CN110124441B - Method and system for treating air leakage of rotary valve - Google Patents

Method and system for treating air leakage of rotary valve Download PDF

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Publication number
CN110124441B
CN110124441B CN201910417963.4A CN201910417963A CN110124441B CN 110124441 B CN110124441 B CN 110124441B CN 201910417963 A CN201910417963 A CN 201910417963A CN 110124441 B CN110124441 B CN 110124441B
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pipeline
real
flue gas
rotary valve
value
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CN110124441A (en
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魏进超
李俊杰
傅旭明
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Zhongye Changtian International Engineering Co Ltd
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Zhongye Changtian International Engineering Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/102—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/40003—Methods relating to valve switching
    • B01D2259/40005—Methods relating to valve switching using rotary valves

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Abstract

A method for judging and processing air leakage of a rotary valve comprises the following steps: 1) the flue gas is absorbed and purified by active carbon in the absorption tower and then is discharged; the activated carbon adsorbing the pollutants in the flue gas enters an analytic tower for analysis, and the analyzed activated carbon enters an adsorption tower; 2) recording the frequency F of the fan motor of the second dust removal system at the initial stage of the operation of the second rotary valve2And the display value P of the second pressure gauge2(ii) a 3) The second rotary valve continuously operates, the value of the second pressure gauge is kept unchanged, and the change of the frequency of a fan motor of the second dust removal system is observed; 4) setting the variation range of the fan motor frequency of the second dust removal system, and if the variation of the fan motor frequency is within the set frequency variation range, enabling the second rotary valve to normally operate; and if the change of the frequency of the fan motor exceeds the set frequency change range, judging that the second rotary valve leaks air. The method is simple to operate, and can effectively judge whether the rotary valve at the top or the bottom of the adsorption tower leaks air.

Description

Method and system for treating air leakage of rotary valve
Technical Field
The invention relates to a method and a system for treating rotary valve air leakage of an activated carbon system, and belongs to the technical field of flue gas purification.
Background
The discharge temperature of the sintering flue gas after passing through the main exhaust fan is between 110 ℃ and 170 ℃, and SO is contained in the sintering flue gas2、NOxDust, dioxin, heavy metal and other pollutants, and the activated carbon flue gas purification technology is just suitable for a sintering flue gas temperature emission interval, can realize the high-efficient purification in coordination of the multiple pollutants, can simultaneously remove the multiple pollutants on one set of equipment, and realizes the byproduct SO2The technology has the advantages of high pollutant removal efficiency, no water resource consumption, no secondary pollution and the like. The activated carbon flue gas purification device is provided with a plurality of subsystems such as an adsorption system, an analytic system, an acid making system and the like,the flue gas is purified after passing through the activated carbon adsorption unit, and activated carbon particles circularly flow between the adsorption unit and the desorption unit, so that the cyclic utilization of 'adsorption of pollutants (completed in the adsorption tower) → warming desorption activation (completed in the desorption tower, so that pollutants escape) → cooling → adsorption of pollutants (completed in the adsorption tower)' is realized.
The raw flue gas enters the adsorption tower through the booster fan, passes through the activated carbon bed layer to realize flue gas purification and then is discharged. In order to prevent the flue gas from being leaked from an active carbon feeding hole and a discharging hole of an adsorption tower, the active carbon conveying and the flue gas sealing are realized by adopting rotary valves at the upper feeding hole and the lower discharging hole of the adsorption tower at present. The active carbon regenerated in the desorption tower enters the adsorption tower through the conveyor and the rotary valve, the active carbon adsorbed with pollutants in the adsorption tower enters the conveyor through the rotary valve and is conveyed to the desorption tower, certain dust can be generated in the process, and the air sucked from the air suction inlet of the conveyor brings the dust in the conveyor into the dust removal system. The rotary valve (the rotary valve of adsorption tower feed inlet and discharge gate department) generally comprises feed inlet, discharge gate, blade, case and valve casing, and all active carbons that get into the adsorption tower all need pass through the feeding rotary valve, and the active carbon of all discharge adsorption towers all need pass through the discharge rotary valve, and consequently, the blade of rotary valve is because active carbon wearing and tearing and hard thing card shell are out of shape easily. Because the flue gas purification equipment must run with the host computer (equipment such as sintering machine) synchronization, consequently, when the rotary valve blade deformation takes place the gas leakage phenomenon, still can't halt immediately and overhaul or change, must wait until the host computer (for example sintering machine) shut down, just can halt in step and overhaul the rotary valve. Moreover, the rotary valve can make a large amount of flue gas reveal to the conveyer after warping seriously, namely, the flue gas that former flue gas pipeline carried the entering adsorption tower, this flue gas is inside through the adsorption tower, reveal from the rotary valve of adsorption tower feed inlet or discharge gate position easily, and contain certain sulfur dioxide in the flue gas revealed, nitrogen oxide, 8% ~ 10% vapor, 0.6% ~ 1% carbon monoxide, 4% ~ 6% carbon dioxide, will cause the conveyer to corrode after this flue gas condensation, some gas gets into dust pelletizing system, still can cause the dust removal pipeline to block up, the gas of emission also can the polluted environment.
Therefore, the defects of the rotary valve in the activated carbon system in the prior art in the production are mainly as follows:
(1) is the inside of the rotary valve invisible, how can you find out if the rotary valve blades are deformed and the blow-by is severe?
(2) If the rotary valve is abnormal (deformed and leaking), the rotary valve cannot be immediately shut down for maintenance, and how to deal with the problem of leakage of the rotary valve before the main machine (the system generating the original smoke) is shut down? The rotary valve is required to be pollution-free and does not condense and block pipelines while the problem of air leakage of the rotary valve is solved.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a method for determining leakage of a rotary valve. The method controls the frequency of a fan motor of a dust removal system connected with a conveyor to be unchanged (or controls the flow of air flow in a conveying pipeline connecting the conveyor and the dust removal system to be unchanged), and by observing the pressure change of the conveying pipeline; or, controlling the pressure in the pipeline of the conveyor to be unchanged, and observing the frequency change of a fan motor of the dust removal system (or observing the flow change of air flow in the pipeline connecting the conveyor and the dust removal system); the method is used for judging whether a rotary valve (a feeding rotary valve or a second rotary valve) at the top of the adsorption tower or a rotary valve (a discharging rotary valve or a first rotary valve) at the bottom of the adsorption tower is in a normal working state or not, and whether the air leakage exists or not is judged. The method is simple to operate, does not need to invest complicated pipeline equipment and reaction devices, and is low in investment cost and remarkable in effect.
The first purpose of the present invention is to determine whether there is a leak condition in the rotary valve (feed rotary valve or second rotary valve) at the top of the adsorption column.
The second purpose of the invention is to provide a method for treating the air leakage of a rotary valve (a feeding rotary valve or a second rotary valve) if the rotary valve (the feeding rotary valve or the second rotary valve) at the top of an adsorption tower exists or air leakage condition exists.
The third purpose of the invention is to judge whether the rotary valve (the discharging rotary valve or the first rotary valve) at the bottom of the adsorption tower has the air leakage condition.
The fourth purpose of the invention is to provide a method for treating the air leakage of the rotary valve (the discharging rotary valve or the first rotary valve) at the bottom of the adsorption tower if the air leakage exists in the rotary valve (the discharging rotary valve or the first rotary valve).
The invention also aims to provide a corresponding rotary valve gas leakage treatment method and a corresponding rotary valve gas leakage treatment system on the basis of the method for judging the gas leakage of the rotary valve, wherein the treatment method and the system can be used for pumping away the flue gas to be leaked to the conveyor, so that the flue gas is prevented from leaking to the conveyor from the rotary valve, and the corrosion and the damage of the flue gas to the conveyor and a dust removal system are avoided; simultaneously through reasonable control, guarantee the rationality of extraction amount of wind, will carry the flue gas of following the material low reaches of feeding and discharging valve, arrange material rotary valve material upper reaches and take away to former flue gas pipeline, guarantee simultaneously that the pipeline of drawing air (the pipeline of flue gas) does not block up because of flue gas condensation dewfall, pollution-free.
According to a first embodiment of the present invention, a method for determining and processing leakage from a rotary valve is provided.
A method for judging leakage of a rotary valve comprises the following steps:
1) the flue gas enters an adsorption tower through a raw flue gas conveying pipeline, and is discharged after being adsorbed and purified by active carbon in the adsorption tower; the activated carbon adsorbed with the pollutants in the flue gas enters a first conveyor through a first rotary valve at the bottom of the adsorption tower, and the first conveyor conveys the activated carbon to an analytic tower for analysis and regeneration; the activated carbon resolved by the resolving tower enters a second conveyor and enters the adsorption tower through a second rotary valve at the top of the adsorption tower;
2) recording the initial frequency F of the fan motor of the second dust-removing system connected with the second conveyor at the initial stage of the operation of the second rotary valve2Or recording the initial flow Q of a second flowmeter on a conveying pipeline connecting the second conveyor and the second dust removal system2And recording the initial pressure P of a second pressure gauge arranged on the second conveyor and located upstream of the second rotary valve2；
3) The second rotary valve is continuously operated to keep the value of the second pressure gauge unchanged to the initial pressure P2Observing the real-time frequency F of the fan motor of the second dust removal system2' or observe the real-time flow Q of the second flowmeter2'; if the real-time frequency F of the fan motor of the second dust removal system2Is equal to the initial frequency F2Or real-time flow rate Q of the second flowmeter2Is equal to the initial flow rate Q2If the second rotary valve is in a normal running state, the observation is continued; if the real-time frequency F of the fan motor of the second dust removal system2' not equal to the initial frequency F2Or real-time flow rate Q of the second flowmeter2' not equal to initial flow Q2Determining the second rotary valve is leaking
In the present invention, step 3) may be: the second rotary valve continuously operates to keep the frequency of the fan motor of the second dust removing system from changing to the initial frequency F2Or keeping the flow rate of the second flowmeter from changing to the initial flow rate Q2Observing the real-time pressure P of the second pressure gauge2'; if the real-time pressure P of the second pressure gauge2Is equal to the initial pressure P2If the second rotary valve is in a normal running state, the observation is continued; if the real-time pressure P of the second pressure gauge2' not equal to the initial pressure P2And judging that the second rotary valve leaks air.
Preferably, step 3) is: the second rotary valve is continuously operated to keep the value of the second pressure gauge unchanged to the initial pressure P2Observing the real-time frequency F of the fan motor of the second dust removal system2' or observe the real-time flow Q of the second flowmeter2'; if the real-time frequency F of the fan motor of the second dust removal system2The value of' being at an initial frequency F2The value is preferably in the range of 80-120% of the initial frequency F2In the range of 85-115% of the value, more preferably at the initial frequency F2In the range of 90-110% of the value or the real-time flow Q of the second flowmeter2The value of' being at the initial flow rate Q2The value is preferably in the range of 80 to 120% of the initial flow rate Q2In the range of 85-115% of the value, more preferably at the initial flow rate Q2The value is within the range of 90-110%, the second rotary valve is in a normal operation state, and the observation is continued; if the real-time frequency F of the fan motor of the second dust removal system2The value of' exceeds the initial frequency F2The range of 80-120% of the value is preferably beyond the initial frequency F2A value in the range of 85-115%, more preferably outside the initial frequency F2Range of 90-110% of value or real-time flow Q of the second flowmeter2' the value exceeds the initial flow rate Q2The range of 80-120% of the value is preferably outside the initial flow rate Q2A range of values from 85 to 115%, more preferably exceeding the initial flow rate Q2And the range of 90-110% of the value, judging that the second rotary valve is air leakage.
Preferably, step 3) may also be: the second rotary valve continuously operates to keep the frequency of the fan motor of the second dust removing system from changing to the initial frequency F2Or keeping the flow rate of the second flowmeter from changing to the initial flow rate Q2Observing the real-time pressure P of the second pressure gauge2'; if the real-time pressure P of the second pressure gauge2At an initial pressure P2The value in the range of 80 to 120% is preferably in the initial pressure P2In the range of 85-115% of the value, more preferably at the initial pressure P2The value is within the range of 90-110%, the second rotary valve is in a normal operation state, and the observation is continued; if the real-time pressure P of the second pressure gauge2' the value exceeds the initial pressure P2The range of 80-120% of the value is preferably above the initial pressure P2A value in the range of 85 to 115%, more preferably exceeding the initial pressure P2And the range of 90-110% of the value, judging that the second rotary valve is air leakage.
According to a second embodiment of the invention, a method of treating rotary valve blow-by or a method of treating second rotary valve blow-by in the first embodiment is provided.
A method of treating rotary valve blow-by or a method of treating second rotary valve blow-by in the first embodiment, the method further comprising the steps of:
4) a fourth pipeline is additionally arranged between the top of the adsorption tower and the second rotary valve, and the flue gas at the lower part of the second rotary valve is mixed with the gas conveyed by the second external gas conveying pipeline through the fourth pipeline and then conveyed to the original flue gas conveying pipeline;
5) is adjusted and arranged at the firstThe second valve on the four pipelines enables the real-time frequency F of the fan motor of the second dust removal system2' restore to equal the initial frequency F2Or real-time flow Q of the second flowmeter2' restore to equal initial flow Q2(ii) a Or, adjusting a second valve disposed on the fourth pipeline so that the real-time pressure P of the second pressure gauge2' Return to equal initial pressure P2。
Preferably, step 5) of this embodiment may be: adjusting a second valve disposed on the fourth pipe such that a real-time frequency F of a fan motor of the second dust removal system2The value of' is restored to be at the initial frequency F2In the range of 80-120% of the value or such that the real-time flow Q of the second flow meter2' the value is restored to the value at the initial flow rate Q2In the range of 80-120% of the value; alternatively, a second valve provided on the fourth pipe is adjusted so that the real-time pressure P of the second pressure gauge2' the value is restored to the initial pressure P2The value is in the range of 80-120%.
Preferably, the method further comprises the steps of:
6a) the other end of the second external gas conveying pipeline is connected with a cooling section gas outlet of the desorption tower, and a fourth valve arranged on the second external gas conveying pipeline is adjusted, so that the temperature of mixed gas obtained by mixing the flue gas conveyed by the fourth pipeline and the gas conveyed by the second external gas conveying pipeline is higher than the acid dew point of the flue gas conveyed by the fourth pipeline.
Preferably, the flue gas conveyed by the fourth pipeline and the gas conveyed by the second external gas conveying pipeline are mixed and then conveyed to the raw flue gas conveying pipeline through the fifth pipeline. And a second thermometer is arranged on the fifth pipeline. The second thermometer detects the temperature of the mixed gas in the pipeline at the corresponding position on line.
Preferably, in step 6a), the fourth valve disposed on the second external gas conveying pipeline is adjusted, so that the temperature of the mixed gas obtained by mixing the flue gas conveyed by the fourth pipeline and the gas conveyed by the second external gas conveying pipeline is higher than the acid dew point of the flue gas conveyed by the fourth pipeline, specifically:
calculating the concentration of sulfur trioxide in the flue gas conveyed by the fourth pipeline: measuring the concentration of sulfur dioxide in the flue gas conveyed by the fourth pipeline as
Figure GDA0003029903750000041
Therefore, the concentration of sulfur trioxide in the flue gas conveyed by the fourth pipeline
Figure GDA0003029903750000042
Comprises the following steps:
Figure GDA0003029903750000043
in the formula (1), k is a constant, and k is 0.1 to 5%, preferably 0.3 to 48%, and more preferably 0.5 to 3%;
calculating an acid dew point of the flue gas conveyed by the fourth pipeline: measuring the concentration of the water vapor in the flue gas conveyed by the fourth pipeline as
Figure GDA0003029903750000044
Therefore, the acid dew point t of the flue gas conveyed by the fourth pipeline can be obtainedld2Comprises the following steps:
Figure GDA0003029903750000051
in the formula (4), the reaction mixture is,
Figure GDA0003029903750000052
the concentration of the water vapor in the flue gas conveyed by the fourth pipeline is percent;
Figure GDA0003029903750000053
is the concentration of sulfur trioxide in the flue gas conveyed by the fourth pipeline,%;
adjusting a fourth valve on the second incoming gas delivery line so that a reading t of a second thermometer on the fifth line2＞tld2。
Preferably, the method may further comprise the steps of:
6b) and adjusting a fourth valve arranged on the second external gas conveying pipeline, so that the acid dew point of the mixed gas obtained by mixing the flue gas conveyed by the fourth pipeline and the gas conveyed by the second external gas conveying pipeline is lower than the ambient temperature.
Preferably, the flue gas conveyed by the fourth pipeline and the gas conveyed by the second external gas conveying pipeline are mixed and then conveyed to the raw flue gas conveying pipeline through the fifth pipeline. The fifth pipeline is provided with second CO (or CO)2) And (7) detecting the instrument. And the second CO detector detects the concentration of CO in the mixed gas in the pipeline at the corresponding position on line.
Preferably, the fourth valve disposed on the second external gas conveying pipeline in step 6b) is adjusted, so that the acid dew point of the mixed gas obtained by mixing the flue gas conveyed by the fourth pipeline and the gas conveyed by the second external gas conveying pipeline is lower than the ambient temperature, specifically:
calculating the concentration of sulfur trioxide in the flue gas conveyed by the fourth pipeline: measuring the concentration of sulfur dioxide in the flue gas conveyed by the fourth pipeline as
Figure GDA0003029903750000054
Therefore, the concentration of sulfur trioxide in the flue gas conveyed by the fourth pipeline
Figure GDA0003029903750000055
Comprises the following steps:
Figure GDA0003029903750000056
in the formula (1), k is a constant, and k is 0.1 to 5%, preferably 0.3 to 4%, and more preferably 0.5 to 3%;
calculating the acid dew point of the mixed gas obtained by mixing the flue gas conveyed by the fourth pipeline and the gas conveyed by the second external gas conveying pipeline: measuring the concentration of the water vapor in the flue gas conveyed by the fourth pipeline as
Figure GDA0003029903750000057
Gas delivered by a second external gas delivery pipelineThe dilution factor of the flue gas conveyed by the fourth pipeline by the body is n2, so that the acid dew point t of the mixed gasld2' is:
Figure GDA0003029903750000058
in the formula (8), the reaction mixture is,
Figure GDA0003029903750000059
is the concentration of water vapor in the mixed gas,%;
Figure GDA00030299037500000510
is the concentration of sulfur trioxide in the mixed gas,%;
thirdly, according to the measured ambient temperature tEnvironment(s)And the acid dew point of the mixed gas obtained by mixing the flue gas conveyed by the fourth pipeline and the gas conveyed by the second external gas conveying pipeline is lower than the ambient temperature, so that the following results are obtained:
tld2'＜tenvironment(s)；………(9)；
Obtaining the dilution factor n2 of the gas conveyed by the second external gas conveying pipeline to the flue gas conveyed by the fourth pipeline according to the formula (9);
and fourthly, calculating the concentration of CO in the mixed gas obtained by mixing the flue gas conveyed by the fourth pipeline and the gas conveyed by the second external gas conveying pipeline:
measuring the concentration of CO in the flue gas conveyed by the fourth pipeline as CCO2Whereby the concentration C of CO in the mixed gas in the fifth pipelineCO2' is:
CCO2’＝CCO2/n2；………(10)；
adjusting a fourth valve on the second incoming gas delivery line so that a second CO detector on the fifth line reads CCO2’。
According to a third embodiment of the present invention, a method for determining leakage from a rotary valve at a discharge position is provided. The method further comprises the following steps:
7) at the beginning of the first rotary valve operation, recording and the secondInitial frequency F of fan motor of first dust removal system connected with conveyor1Or recording the initial flow Q of the first flowmeter on the conveying pipeline connecting the first conveyor and the first dust removal system1And recording the initial pressure P of a first pressure gauge arranged on the first conveyor and located downstream of the first rotary valve1；
8) The first rotary valve is continuously operated, and the value of the first pressure gauge is kept unchanged to the initial pressure P1Observing the real-time frequency F of the fan motor of the first dust removal system1' or observe the real-time flow Q of the first flowmeter1'; if the real-time frequency F of the fan motor of the first dust removal system1Is equal to the initial frequency F1Or real-time flow Q of the first flow meter1Is equal to the initial flow rate Q1If the first rotary valve is in a normal running state, the observation is continued; if the real-time frequency F of the fan motor of the first dust removal system1' not equal to the initial frequency F1Or real-time flow Q of the first flow meter1' not equal to initial flow Q1And judging that the first rotary valve leaks air.
In this embodiment, step 8) may also be: the first rotary valve continuously operates to keep the frequency of the fan motor of the first dust removal system unchanged to the initial frequency F1Or keeping the flow rate of the first flowmeter from becoming the initial flow rate Q1Observing the real-time pressure P of the first pressure gauge1'; if the real-time pressure P of the first pressure gauge1Is equal to the initial pressure P1If the first rotary valve is in a normal running state, the observation is continued; if the real-time pressure P of the first pressure gauge1' not equal to the initial pressure P1And judging that the first rotary valve leaks air.
Preferably, step 8) is: the first rotary valve is continuously operated, and the value of the first pressure gauge is kept unchanged to the initial pressure P1Observing the real-time frequency F of the fan motor of the first dust removal system1' or observe the real-time flow Q of the first flowmeter1'; if the real-time frequency F of the fan motor of the first dust removal system1The value of' being at an initial frequency F1In the range of 80-120% of the valuePreferably at an initial frequency F1In the range of 85-115% of the value, more preferably at the initial frequency F1In the range of 90-110% of the value or real-time flow Q of the first flow meter1The value of' being at the initial flow rate Q1The value is preferably in the range of 80 to 120% of the initial flow rate Q1In the range of 85-115% of the value, more preferably at the initial flow rate Q1The value is in the range of 90-110%, the first rotary valve is in a normal operation state, and the observation is continued; if the real-time frequency F of the fan motor of the first dust removal system1The value of' exceeds the initial frequency F1The range of 80-120% of the value is preferably beyond the initial frequency F1A value in the range of 85-115%, more preferably outside the initial frequency F1Range of 90-110% of value or real-time flow Q of the first flow meter1' the value exceeds the initial flow rate Q1The range of 80-120% of the value is preferably outside the initial flow rate Q1A range of values from 85 to 115%, more preferably exceeding the initial flow rate Q1And the range of 90-110% of the value, judging that the first rotary valve is air leakage.
Preferably, step 8) may also be: the first rotary valve continuously operates to keep the frequency of the fan motor of the first dust removal system unchanged to the initial frequency F1Or keeping the flow rate of the first flowmeter from becoming the initial flow rate Q1Observing the real-time pressure P of the first pressure gauge1'; if the real-time pressure P of the first pressure gauge1At an initial pressure P1The value in the range of 80 to 120% is preferably in the initial pressure P1In the range of 85-115% of the value, more preferably at the initial pressure P1The value is in the range of 90-110%, the first rotary valve is in a normal operation state, and the observation is continued; if the real-time pressure P of the first pressure gauge1' the value exceeds the initial pressure P1The range of 80-120% of the value is preferably above the initial pressure P1A value in the range of 85 to 115%, more preferably exceeding the initial pressure P1And the range of 90-110% of the value, judging that the first rotary valve is air leakage.
According to a fourth embodiment of the present invention, a method of treating rotary valve blow-by at a dump location is provided. The method further comprises the following steps:
9) a first pipeline is additionally arranged between the bottom of the adsorption tower and the first rotary valve, and the flue gas on the upper part of the first rotary valve is mixed with the gas conveyed by the first external gas conveying pipeline through the first pipeline and then conveyed to the original flue gas conveying pipeline;
10) adjusting a first valve arranged on the first pipeline to enable the real-time frequency F of the fan motor of the first dust removal system1' restore to equal the initial frequency F,1Or real-time flow Q of the first flowmeter1' restore to equal initial flow Q1. Or, adjusting a first valve disposed on the first pipe so that the real-time pressure P of the first pressure gauge1Is equal to the initial pressure P1。
In this embodiment, step 10) may also be: adjusting a first valve arranged on the first pipeline to enable the real-time frequency F of the fan motor of the first dust removal system1' the value restores the initial frequency F1In the range of 80-120% of the value or such that the real-time flow Q of the first flow meter1' the value restores the initial flow Q1The value is in the range of 80-120%. Or, adjusting a first valve disposed on the first pipe so that the real-time pressure P of the first pressure gauge1' value restores the initial pressure P1The value is in the range of 80-120%.
Preferably, the method further comprises the steps of:
11a) the other end of the first external gas conveying pipeline is connected with a cooling section gas outlet of the desorption tower, and a third valve arranged on the first external gas conveying pipeline is adjusted, so that the temperature of mixed gas obtained after mixing the flue gas conveyed by the first pipeline and the gas conveyed by the first external gas conveying pipeline is higher than the acid dew point of the flue gas conveyed by the first pipeline.
Preferably, the flue gas conveyed by the first pipeline and the gas conveyed by the first external gas conveying pipeline are mixed and then conveyed to the original flue gas conveying pipeline through the second pipeline. The second pipeline is provided with a first thermometer. The first thermometer detects the temperature of the mixed gas in the pipeline at the corresponding position on line.
Preferably, the third valve disposed on the first external gas conveying pipeline in step 11a) is adjusted, so that the temperature of the mixed gas obtained by mixing the flue gas conveyed by the first pipeline and the gas conveyed by the first external gas conveying pipeline is higher than the acid dew point of the flue gas conveyed by the first pipeline, specifically:
calculating the concentration of sulfur trioxide in the flue gas conveyed by the first pipeline: measuring the concentration of sulfur dioxide in the flue gas conveyed by the first pipeline as
Figure GDA0003029903750000081
Therefore, the concentration of sulfur trioxide in the flue gas conveyed by the first pipeline
Figure GDA0003029903750000082
Comprises the following steps:
Figure GDA0003029903750000083
in the formula (1), k is a constant, and k is 0.1 to 5%, preferably 0.3 to 4%, and more preferably 0.5 to 3%;
calculating the acid dew point of the flue gas conveyed by the first pipeline: measuring the concentration of the water vapor in the flue gas conveyed by the first pipeline as
Figure GDA0003029903750000084
Therefore, the acid dew point t of the flue gas conveyed by the first pipeline can be obtainedld1Comprises the following steps:
Figure GDA0003029903750000085
in the formula (2), the reaction mixture is,
Figure GDA0003029903750000086
the concentration of water vapor in the flue gas conveyed by the first pipeline is percent;
Figure GDA0003029903750000087
the concentration of sulfur trioxide in the flue gas conveyed for the first pipe%；
Adjusting a third valve on the first external gas delivery line such that a reading t of a first thermometer on the second line1＞tld1。
Preferably, the method may further comprise the steps of:
11b) and adjusting a third valve arranged on the first external gas conveying pipeline, so that the acid dew point of the mixed gas obtained by mixing the flue gas conveyed by the first pipeline and the gas conveyed by the first external gas conveying pipeline is lower than the ambient temperature.
Preferably, the flue gas conveyed by the first pipeline and the gas conveyed by the first external gas conveying pipeline are mixed and then conveyed to the original flue gas conveying pipeline through the second pipeline. The second pipeline is provided with first CO (or CO)2) And (7) detecting the instrument. The first CO detector detects CO (or CO) in the mixed gas in the pipeline at the corresponding position on line2) The concentration of (c).
Preferably, the adjusting step 11b) is to adjust a third valve disposed on the first external gas conveying pipeline, so that the acid dew point of the mixed gas obtained by mixing the flue gas conveyed by the first pipeline and the gas conveyed by the first external gas conveying pipeline is lower than the ambient temperature, specifically:
calculating the concentration of sulfur trioxide in the flue gas conveyed by the first pipeline: measuring the concentration of sulfur dioxide in the flue gas conveyed by the first pipeline as
Figure GDA0003029903750000088
Therefore, the concentration of sulfur trioxide in the flue gas conveyed by the first pipeline
Figure GDA0003029903750000089
Comprises the following steps:
Figure GDA00030299037500000810
in the formula (1), k is a constant, and k is 0.1 to 5%, preferably 0.3 to 4%, and more preferably 0.5 to 3%;
calculating the smoke and the first foreign matter transported by the first pipelineAcid dew point of mixed gas obtained by mixing two gases conveyed by a gas conveying pipeline: measuring the concentration of the water vapor in the flue gas conveyed by the first pipeline as
Figure GDA00030299037500000811
Setting the dilution multiple of the gas conveyed by the first external gas conveying pipeline to the flue gas conveyed by the first pipeline as n1, so that the acid dew point t of the mixed gasld1' is:
Figure GDA0003029903750000091
in the formula (5), the reaction mixture is,
Figure GDA0003029903750000092
is the concentration of water vapor in the mixed gas,%;
Figure GDA0003029903750000093
is the concentration of sulfur trioxide in the mixed gas,%;
thirdly, according to the measured ambient temperature tEnvironment(s)The acid dew point of the mixed gas obtained by mixing the flue gas conveyed by the first pipeline and the gas conveyed by the first external gas conveying pipeline is lower than the ambient temperature, so that the following results are obtained:
tld1'＜tenvironment(s)；………(6)；
Obtaining the dilution multiple n1 of the gas conveyed by the first external gas conveying pipeline to the flue gas conveyed by the first pipeline according to the formula (6);
and fourthly, calculating the concentration of CO in the mixed gas obtained by mixing the flue gas conveyed by the first pipeline and the gas conveyed by the first external gas conveying pipeline:
measuring the concentration of CO in the flue gas conveyed by the first pipeline as CCO1Whereby the concentration C of CO in the mixed gas in the second pipelineCO1' is:
CCO1’＝CCO1/n1；………(7)；
adjusting a third valve on the first external gas delivery line so that the second tubeThe reading of the first CO detector on the way is CCO1’。
Preferably, the first dust removal system is connected to the first conveyor through a third pipe. Preferably, the third pipeline is provided with a first flow meter.
Preferably, the second dust removing system is connected to the second conveyor through a sixth pipe. Preferably, the sixth pipeline is provided with a second flowmeter.
According to a fifth embodiment of the present invention, there is provided a system for determining leakage from a rotary valve or a system for use in the method of determining of the first embodiment.
A system for judging and processing air leakage of a rotary valve comprises an adsorption tower, a desorption tower, a second rotary valve, a second conveyor, a second dust removal system, a second pressure gauge, a raw flue gas conveying pipeline and a sixth pipeline; wherein, the raw flue gas conveying pipeline is connected to a flue gas inlet of the adsorption tower; the second conveyor is connected with an activated carbon outlet of the desorption tower and an activated carbon inlet of the adsorption tower; a second rotary valve is arranged at an active carbon inlet of the adsorption tower; the second dust removal system is connected with the second conveyor through a sixth pipeline; and a second pressure gauge is arranged on the second conveyor.
Preferably, the sixth pipeline is provided with a second flowmeter.
According to a sixth embodiment of the present invention, there is provided a treatment system for rotary valve blow-by or a treatment system for treating the treatment method of the second embodiment.
The system comprises the system described in the fifth embodiment, and further comprises: a feeding pipeline is arranged between the active carbon inlet of the adsorption tower and the second conveyor. The second rotary valve is arranged on the feeding pipeline. And a fourth pipeline and a second external gas conveying pipeline which are led out from the feeding pipeline and positioned at the downstream of the second rotary valve are combined and then connected to the original flue gas conveying pipeline through a fifth pipeline.
Preferably, a second valve is arranged on the fourth pipeline.
Preferably, the second external gas conveying pipeline is provided with a fourth valve.
Preferably, a second detection device is arranged on the fifth pipeline;
preferably, the second detection means is a second thermometer or a second CO (or CO)2) And (7) detecting the instrument.
Preferably, the feeding pipeline is provided with a second online smoke analyzer.
Preferably, the other end of the second external gas conveying pipeline is connected to a cooling section gas outlet of the desorption tower.
According to a seventh embodiment of the present invention, there is provided a system for determining leakage from a rotary valve or a system for use in the method of determining of the third embodiment.
The system comprises the system described in the fifth embodiment, and further comprises: the device comprises a first rotary valve, a first conveyor, a first dust removal system, a first pressure gauge and a third pipeline; wherein the first conveyor is connected with an active carbon outlet of the adsorption tower and an active carbon inlet of the desorption tower; a first rotary valve is arranged at an active carbon outlet of the adsorption tower; the first dust removal system is connected with the first conveyor through a third pipeline; a first pressure gauge is arranged on the first conveyor.
Preferably, the third pipeline is provided with a first flowmeter.
According to an eighth embodiment of the present invention, there is provided a treatment system for rotary valve blow-by or a treatment system for treating the treatment method of the fourth embodiment.
The system comprises the system described in the sixth and seventh embodiments, and further comprises: a discharging pipeline is arranged between the active carbon outlet of the adsorption tower and the first conveyor; the first rotary valve is arranged on the discharging pipeline; the first pipeline and the first external gas conveying pipeline which are led out from the feeding pipeline and positioned at the upstream of the first rotary valve are combined and then connected to the original flue gas conveying pipeline through the second pipeline.
Preferably, the first pipeline is provided with a first valve.
Preferably, the first external gas conveying pipeline is provided with a third valve.
Preferably, the second pipeline is provided with a first detection device; preferably, the first detection device is a first thermometer or a first CO (or CO)2) And (7) detecting the instrument.
Preferably, the blanking pipeline is provided with a first online smoke analyzer.
Preferably, the other end of the first external gas conveying pipeline is connected to a cooling section gas outlet of the desorption tower.
In the invention, the flue gas enters the adsorption tower under the action of the booster fan, and is adsorbed and purified by the active carbon in the adsorption tower and then discharged. The active carbon that has adsorbed pollutant in the flue gas gets into first conveyer through the first rotary valve in adsorption tower bottom, and first conveyer carries the active carbon to the analytic tower and resolves, the regeneration, and the active carbon after the resolution gets into the second conveyer, gets into the adsorption tower via the second rotary valve at adsorption tower top, via carrying out purification treatment to the flue gas, accomplishes once complete material and circulates.
According to the communication characteristics among the adsorption tower, the conveyor and the dust removal system, if the rotary valve leaks gas, the flue gas conveyed to the adsorption tower passes through the adsorption tower, leaks when passing through the second rotary valve from the top of the adsorption tower and then enters the second conveyor. The second conveyor has a fixed gas flow inside, and if the second rotary valve does not generate gas leakage, the pressure in the second conveyor, the flow rate of the second gas conveyed to the dust removal system and the frequency of the fan of the second dust removal system are fixed (or changed within a set range). If the second rotary valve generates air leakage, the flue gas entering the adsorption tower leaks from the position of the second rotary valve and enters the second conveyor. In the application, a second pressure gauge is arranged on the second conveyor and at the downstream of the discharge material flow of the second rotary valve, if the second rotary valve leaks air, the pressure of the second pressure gauge displays, the air flow in a pipeline connecting the second conveyor and the dust removal system and the fan frequency of the second dust removal system, and the reading of one position of the second pressure gauge, the air flow in the pipeline connecting the second conveyor and the dust removal system can be changed.
In the invention, the method for judging the air leakage of the second rotary valve comprises the following steps: recording a second dust removal connected with a second conveyor at the initial stage of commissioning of the second rotary valve or when the second rotary valve is in a normal working stateInitial frequency F of the fan motor of the system2And initial pressure P of a second pressure gauge provided on the second conveyor2The size of (d); secondly, the second rotary valve continuously operates, and the value of the second pressure gauge is kept unchanged to the initial pressure P2Observing the change of the real-time frequency of a fan motor of the second dust removal system; setting the variation range of the real-time frequency of the fan motor of the second dust removing system, and if the real-time frequency of the fan motor of the second dust removing system is F2The variation of' is within a set frequency variation range (or the real-time frequency F of the fan motor of the second dust removal system)2Is equal to the initial frequency F2) If so, the second rotary valve is judged to be in a normal running state, and the real-time frequency F of the fan motor of the second dust removal system is continuously observed2Variations of' are possible. If the real-time frequency F of the fan motor of the dust removing system2' the variation exceeds a set frequency variation range (or a real-time frequency F of a fan motor of the second dust removal system)2' not equal to the initial frequency F2) And judging that the second rotary valve has air leakage.
In the invention, another method for judging the leakage of the rotary valve comprises the following steps: recording the initial frequency F of a fan motor of a dust removal system connected with a second conveyor at the initial stage of commissioning of the second rotary valve or when the second rotary valve is in a normal working state2And initial pressure P of a second pressure gauge provided on the second conveyor2The size of (d); secondly, the second rotary valve continuously operates to keep the frequency of the fan motor of the second dust removal system unchanged to the initial frequency F2Observing the real-time pressure P of the second pressure gauge2'; setting real-time pressure P of second pressure gauge2' if the real-time pressure P of the second pressure gauge2The variation of' is within the set pressure variation range (or the real-time pressure P of the second pressure gauge)2Is equal to the initial pressure P2) And if the second rotary valve is in a normal running state, continuously observing the change of the real-time frequency of the fan motor of the second dust removal system. If the real-time pressure P of the second pressure gauge2' the variation exceeds the set pressure variation range (or the real-time pressure P of the second pressure gauge)2' not equal to the initial pressure P2) And judging that the second rotary valve has air leakage.
Preferably, the second flowmeter is arranged on a sixth pipeline between the second conveyor and the second dust removal system. The method does not need to consider the frequency of a fan motor of the second dust removal system, and can also judge the air leakage of the second rotary valve by matching the second flowmeter with the second pressure gauge. The method specifically comprises the following steps: 1) recording the initial flow Q of the second flowmeter at the initial stage of the operation of the second rotary valve or when the second rotary valve is in a normal working state2And initial pressure P of a second pressure gauge provided on the second conveyor2(ii) a 2) The second rotary valve is continuously operated to keep the value of the second pressure gauge unchanged to the initial pressure P2Is observed, the real-time flow Q of the second flowmeter is observed2'; 3) setting the real-time flow rate variation range of the second flow meter on the sixth pipeline, and if the reading variation of the second flow meter is within the set flow rate variation range (or the real-time flow rate Q of the second flow meter)2Is equal to the initial flow rate Q2) If the second rotary valve is in the normal operation state, the real-time flow Q of the second flowmeter is continuously observed2' to get it; if the real-time flow change of the second flowmeter exceeds the set flow change range (or the real-time flow Q of the second flowmeter)2' not equal to initial flow Q2) And judging that the second rotary valve has air leakage.
In the present invention, another method for determining air leakage of the second rotary valve is: recording the initial flow Q of a second flowmeter connected with a second conveyor at the initial stage of commissioning of the second rotary valve or when the second rotary valve is in a normal working state2And initial pressure P of a second pressure gauge provided on the second conveyor2The size of (d); the second rotary valve continuously operates to keep the real-time flow Q of the second flowmeter2' not changing to initial flow Q2Observing the real-time pressure P of the second pressure gauge2'; setting real-time pressure P of second pressure gauge2' if the real-time pressure P of the second pressure gauge2The variation of' is within the set pressure variation rangeReal-time pressure P of internal (or, second pressure gauge)2Is equal to the initial pressure P2) If the second rotary valve is in the normal operation state, the real-time pressure P of the second pressure gauge is continuously observed2Variations of' are possible. If the real-time pressure P of the second pressure gauge2' the variation exceeds the set pressure variation range (or, the real-time pressure P of the second pressure gauge2' not equal to the initial pressure P2) And judging that the second rotary valve has air leakage.
In the present invention, the change of the real-time frequency of the fan motor of the second dust removal system in the set frequency change range means: real time frequency F2The value of' is the initial frequency F2In the range of 80-120% of the value, preferably the initial frequency F2In the range of 85-115% of the value, more preferably the initial frequency F2In the range of 90-110% of the value. I.e. the real-time frequency F2Values of' are (80-120%) F2Preferably the real-time frequency F2The value of' is (85-115%) F2More preferably the real-time frequency F2Values of' are (90-110%) F2Within the range of (1). Correspondingly, the change of the real-time frequency of the fan motor of the second dust removal system exceeds the set frequency change range, namely the change exceeds the range.
In the present invention, the real-time pressure P of the second pressure gauge2The variation of' within the set frequency variation range means: real time pressure P2The value of' is the initial pressure P2In the range of 80-120% of the value, preferably the initial pressure P2In the range of 85-115% of the value, more preferably the initial pressure P2In the range of 90-110% of the value. I.e. real time pressure P2A value of' P (80-120%)2Preferably the real-time pressure P2A value of' P (85-115%)2More preferably the real-time pressure P2A value of' P (90-110%)2Within the range of (1). Accordingly, the real-time pressure P of the second pressure gauge2The variation of' is beyond the set pressure variation range, that is, beyond the above range.
In the present invention, of the second flowmeterThe change of the reading is within the set flow change range, and the reading is as follows: real-time flow Q2The value of' is the initial flow rate Q2In the range of 80 to 120% of the value, preferably the initial flow rate Q2Within the range of 85-115% of the value, more preferably the initial flow rate Q2In the range of 90-110% of the value. I.e. real time traffic Q2A value of' is (80-120%). Q2Preferably the real-time flow rate Q2A value of' is (85-115%) Q2More preferably the real-time flow rate Q2A value of' is (90-110%) Q2Within the range of (1). Correspondingly, the real-time flow change of the second flow meter exceeds the set flow change range, namely the real-time flow change of the second flow meter exceeds the range.
By the method, whether the second rotary valve has the air leakage condition can be judged timely and accurately. The method provided by the invention can detect whether the vane of the second rotary valve is deformed without seeing the specific structure condition in the second rotary valve, namely, without seeing whether the vane in the second rotary valve is damaged by abrasion and the like. Meanwhile, the severity of the air leakage of the second rotary valve can be judged through the change of any one parameter of the real-time frequency of a fan motor of the second dust removal system, the real-time pressure of the second pressure gauge or the real-time flow of the second flow meter and the amplitude range of the change; the larger the change amplitude of any one of the three data is, the more serious the air leakage of the second rotary valve is; the smaller the amplitude of the change, the lighter the air leakage of the second rotary valve is, and even the air leakage is.
In the invention, the method for treating the leakage gas of the second rotary valve comprises the following steps: the flue gas to be leaked to the second conveyor is pumped away, so that the flue gas is prevented from corroding the second conveyor after entering the second conveyor for condensation, and further the flue gas is prevented from entering the second dust removal system, so that the second dust removal pipeline is prevented from being blocked and the second dust removal system is prevented from being corroded; meanwhile, the corresponding air quantity is conveyed by the second external gas conveying pipeline to be mixed with the flue gas to be leaked, so that the corrosion and blockage of the air suction pipeline (the pipeline for conveying the flue gas to be leaked) due to condensation and condensation of the flue gas are avoided. In addition, the flue gas to be leaked and the gas conveyed by the second external gas conveying pipeline enter the adsorption tower through the original flue gas conveying pipeline for purification treatment, so that the pollution of the emission of the flue gas to the environment is also reduced.
In the embodiment of the invention for judging the leakage of the rotary valve, the fourth pipeline led out from the feeding pipeline and the second external gas conveying pipeline are combined and then connected to the original flue gas conveying pipeline through the fifth pipeline. Preferably, the other end of the second external gas conveying pipeline is connected to a cooling section gas outlet of the desorption tower. Generally, a booster fan is arranged on the raw flue gas conveying pipeline, and the connection position of the fifth pipeline and the raw flue gas conveying pipeline is located at the upstream of the booster fan (the upstream is set according to the flow direction of the flue gas in the raw flue gas conveying pipeline). The invention utilizes the negative pressure at the inlet of the booster fan to extract the flue gas to be leaked to the conveyor through the fourth pipeline, and simultaneously extracts the cooling air discharged from the gas outlet of the cooling section of the analysis tower through the second external gas conveying pipeline. Adjusting a second valve arranged on the fourth pipeline to recover the frequency of the fan motor of the second dust removal system to the initial frequency F under the condition that the value of the second pressure gauge is not changed0(or return to within a set range); or, a second valve arranged on the fourth pipeline is adjusted, so that the reading of the second flowmeter is recovered to the initial flow Q under the condition that the value of the second pressure gauge is unchanged0(or return to within a set range); thereby prevented that the flue gas in the adsorption tower from revealing to the second conveyer because the deformation of second rotary valve, also guaranteed the rationality of extraction amount of wind. Or, a second valve arranged on the fourth pipeline is adjusted, so that the value of the second pressure gauge is recovered to the initial pressure P under the condition that the frequency of a fan motor of the second dust removal system or the reading of the second flow meter is not changed0(or return to within a set range); thereby prevented that the flue gas in the adsorption tower from revealing to the second conveyer because the deformation of second rotary valve, also guaranteed the rationality of extraction amount of wind.
Because the high-temperature active carbon in the desorption tower indirectly exchanges heat with cooling air in the cooling section, the temperature of the cooling air discharged from the gas outlet of the cooling section of the desorption tower is higher and is 100-130 ℃. In consideration of heat dissipation of the pipeline, the air volume of the extracted cooling air at the gas outlet of the cooling section of the desorption tower is controlled by adjusting the fourth valve arranged on the second external gas conveying pipeline, so that the temperature of the mixed gas obtained by mixing the cooling air at the outlet of the desorption tower and the flue gas leaked to the second conveyor is higher than the acid dew point of the mixed gas, namely the temperature of the mixed gas obtained by mixing the gas conveyed by the second external gas conveying pipeline and the flue gas conveyed by the fourth pipeline is higher than the acid dew point of the mixed gas, and the corrosion and blockage of the air suction pipeline due to condensation and condensation of the flue gas are avoided.
According to the relation formula, the acid dew point of the flue gas
Figure GDA0003029903750000141
(wherein,
Figure GDA0003029903750000142
concentration,%, of water vapour in the flue gas conveyed by the fourth conduit (L6);
Figure GDA0003029903750000143
the concentration and the percent of sulfur trioxide in the flue gas conveyed by the fourth pipeline (L6) show that the acid dew point of the flue gas is related to the content of the water vapor and the sulfur trioxide in the flue gas, when the flue gas to be leaked is mixed with the cooling air at the outlet of the desorption tower, the content of the water vapor and the sulfur trioxide in the mixed gas is reduced, and correspondingly, the acid dew point of the mixed gas is reduced. Therefore, in order to avoid the corrosion and blockage of the exhaust pipeline due to the condensation and the condensation of the flue gas, the fourth valve is adjusted to enable the temperature of the mixed gas to be higher than the acid dew point of the mixed gas, and the acid dew point of the mixed gas is lower than the acid dew point of the flue gas to be leaked, so that the temperature of the mixed gas is higher than the acid dew point of the flue gas to be leaked only by adjusting the fourth valve, namely, the temperature of the mixed gas after the mixed gas of the gas conveyed by the second external gas conveying pipeline and the flue gas conveyed by the fourth pipeline is higher than the acid dew point of the flue gas conveyed by the fourth pipeline.
In the invention, the concentration of sulfur dioxide and the concentration of water vapor in the flue gas conveyed by the fourth pipeline are both measured by a second on-line flue gas analyzer of the activated carbon flue gas purification system. The second on-line flue gas analyzer is arranged on the feeding pipeline of the adsorption tower and is used for measuring the concentration of sulfur dioxide and water vapor in the flue gas at the position, namely the concentration of the sulfur dioxide and the water vapor in the flue gas which is about to leak to the second conveyor. The concentration of sulfur trioxide in the flue gas can be obtained by measuring the concentration of sulfur dioxide in the flue gas, so that the acid dew point of the flue gas to be leaked to the second conveyor is calculated. And adjusting a fourth valve on the second external gas conveying pipeline, and controlling the cooling air quantity at the outlet of the extracted desorption tower, so that the temperature of the mixed gas, namely the reading of a thermometer on the fifth pipeline, is greater than the acid dew point of the flue gas to be leaked, and the corrosion and blockage of the air suction pipeline due to condensation and dewing of the flue gas are avoided.
In the present invention, the method for treating the second rotary valve leakage gas may further be: and a fourth pipeline and a second external gas conveying pipeline which are led out from the feeding pipeline are combined and then connected to the original flue gas conveying pipeline through a fifth pipeline. The second external gas conveying pipeline is not connected with a gas outlet of the cooling section of the desorption tower, and directly conveys dilution gas (such as air) to dilute the flue gas to be leaked. According to the invention, the fourth valve arranged on the second external gas conveying pipeline is adjusted to control the air volume of the conveyed diluent gas, so that the acid dew point of the mixed gas obtained by mixing the cold air conveyed by the second external gas conveying pipeline and the flue gas conveyed by the fourth pipeline is lower than the ambient temperature, and the corrosion and blockage of the air suction pipeline due to condensation and condensation of the flue gas are avoided.
And obtaining the dilution multiple n2 of the cold air conveyed by the second external gas conveying pipeline to the flue gas conveyed by the fourth pipeline according to the condition that the acid dew point of the mixed gas is lower than the ambient temperature. Because the content of CO in the flue gas is relatively fixed, and the atmosphere contains almost no CO (or the content of CO is very little) and can be ignored, the concentration C of CO in the mixed gasCO2' that is, the concentration C of CO in the flue gas conveyed by the fourth pipelineCO2Concentration after dilution by n2 times, i.e. CCO2’＝CCO2And/n 2. Adjusting a fourth valve on the second external gas conveying pipeline to control the air quantity of the conveyed cold air, so that the reading of a second CO detector on the fifth pipeline is CCO2', thereby realizing the acid of the mixed gasThe dew point is lower than the environment temperature, so that the corrosion and blockage of the exhaust pipeline due to the condensation and the dewing of the flue gas are avoided.
In addition, due to CO in the flue gas2Is also relatively constant and contains atmospheric CO2The content of (A) is also very low, and is 0.03-0.04% (volume ratio), which can be ignored. Therefore, in the third and fourth embodiments of the present invention, the second detection means provided on the fifth pipeline is replaced with the second CO2The detector can also realize the technical scheme.
In the invention, the concentration of sulfur dioxide and the concentration of water vapor in the flue gas conveyed by the fourth pipeline and CO (or CO) in the flue gas conveyed by the fourth pipeline2) The concentration of (b) is measured by a second on-line flue gas analyzer of the activated carbon flue gas purification system.
In the invention, the frequency of the fan motor of the second dust removal system can be obtained by displaying the fan motor. The second flow meter detects the flow rate of the gas in the conveying pipe (i.e., the sixth pipe) connecting between the second conveyor and the second dust removal system. The second pressure gauge is used for detecting the pressure value of gas circulation in the second conveyor. The fourth pipeline is used for carrying the flue gas that will reveal above the rotary valve to former flue gas pipeline, avoids revealing of second rotary valve. The second external gas conveying pipeline is used for mixing with the flue gas in the fourth pipeline, and the mixed flue gas is combined and conveyed to the original flue gas conveying pipeline through the fifth pipeline. The second external gas is used for adjusting the temperature of the mixed gas in the fifth pipeline, so that the temperature of the mixed gas is higher than the acid dew point temperature of the mixed gas; or adjusting the acid dew point temperature of the mixed gas in the fifth pipeline to enable the acid dew point temperature of the mixed gas to be lower than the ambient temperature; thereby avoiding the corrosion of the pipeline for conveying the mixed gas.
According to the communication characteristics among the adsorption tower, the first conveyor and the first dust removal system, if the first rotary valve leaks gas, the flue gas conveyed to the adsorption tower passes through the adsorption tower, leaks when passing through the first rotary valve from the bottom of the adsorption tower and then enters the first conveyor. The first conveyor has a fixed gas circulation inside, and if the first rotary valve does not generate gas leakage, the pressure in the first conveyor, the gas flow in the pipeline connecting the first conveyor and the dust removal system and the fan frequency of the first dust removal system are fixed (or changed within a set range). If the first rotary valve generates air leakage, the flue gas entering the adsorption tower leaks from the position of the first rotary valve and enters the first conveyor. In the application, a first pressure gauge is arranged on a first conveyor and at the downstream of the material discharging flow of a first rotary valve, if the first rotary valve leaks air, the pressure of the first pressure gauge displays, the air flow in a pipeline connecting the first conveyor and a dust removal system and the fan frequency of the first dust removal system, and the reading of one position of the first pressure gauge, the air flow in the pipeline connecting the first conveyor and the dust removal system can be changed.
In the invention, the method for judging the air leakage of the first rotary valve comprises the following steps: recording initial frequency F of a fan motor of a first dust removal system connected with a first conveyor at the initial stage of commissioning of the first rotary valve or when the first rotary valve is in a normal working state1And an initial pressure P of a first pressure gauge provided on the first conveyor1The size of (d); secondly, the first rotary valve continuously operates, and the value of the first pressure gauge is kept unchanged to be the initial pressure P1Observing the change of the real-time frequency of a fan motor of the first dust removal system; setting the variation range of the real-time frequency of the fan motor of the first dust removal system, and if the real-time frequency of the fan motor of the first dust removal system is F1The variation of' is within a set frequency variation range (or the real-time frequency F of the fan motor of the first dust removal system)1Is equal to the initial frequency F1) If so, the first rotary valve is judged to be in a normal running state, and the real-time frequency F of the fan motor of the first dust removal system is continuously observed1Variations of' are possible. If the real-time frequency F of the fan motor of the dust removing system1' the variation exceeds a set frequency variation range (or a real-time frequency F of a fan motor of the first dust removal system)1' not equal to the initial frequency F1) And judging that the first rotary valve has air leakage.
In the present invention, the other oneThe method for judging the air leakage of the rotary valve comprises the following steps: recording initial frequency F of a fan motor of a dust removal system connected with a first conveyor at the initial stage of commissioning of the first rotary valve or when the first rotary valve is in a normal working state1And an initial pressure P of a first pressure gauge provided on the first conveyor1The size of (d); secondly, the first rotary valve continuously operates to keep the frequency of the fan motor of the first dust removal system unchanged to the initial frequency F1Observing the real-time pressure P of the first pressure gauge1'; setting real-time pressure P of first pressure gauge1' if the real-time pressure P of the first pressure gauge1The variation of' is within the set pressure variation range (or the real-time pressure P of the first pressure gauge)1Is equal to the initial pressure P1) And if the first rotary valve is in a normal running state, continuously observing the change of the real-time frequency of the fan motor of the first dust removal system. If the real-time pressure P of the first pressure gauge1' the variation exceeds the set pressure variation range (or the real-time pressure P of the first pressure gauge)1' not equal to the initial pressure P1) And judging that the first rotary valve has air leakage.
Preferably, the first flow meter is arranged on a third pipeline between the first conveyor and the first dust removal system. The method does not need to consider the frequency of the fan motor of the first dust removal system, and can also judge the air leakage of the first rotary valve by matching the first flowmeter with the first pressure gauge. The method specifically comprises the following steps: 1) recording the initial flow Q of the first flowmeter at the initial operation stage of the first rotary valve or when the first rotary valve is in a normal working state1And an initial pressure P of a first pressure gauge provided on the first conveyor1(ii) a 2) The first rotary valve is continuously operated, and the value of the first pressure gauge is kept unchanged to the initial pressure P1Is observed, the real-time flow Q of the first flowmeter is observed1'; 3) setting the real-time flow rate variation range of the first flow meter on the third pipeline, and if the reading variation of the first flow meter is within the set flow rate variation range (or the real-time flow rate Q of the first flow meter)1Is equal to the initial flow rate Q1) The first rotary valve is in normal operationContinuously observing the real-time flow Q of the first flowmeter1' to get it; if the real-time flow change of the first flowmeter exceeds the set flow change range (or the real-time flow Q of the first flowmeter)1' not equal to initial flow Q1) And judging that the first rotary valve has air leakage.
In the present invention, another method for determining air leakage of a first rotary valve is: recording initial flow Q of a first flowmeter connected with a first conveyor at the initial stage of commissioning of the first rotary valve or when the first rotary valve is in a normal working state1And an initial pressure P of a first pressure gauge provided on the first conveyor1The size of (d); the first rotary valve continuously operates to keep the real-time flow Q of the first flowmeter1' not changing to initial flow Q1Observing the real-time pressure P of the first pressure gauge1'; setting real-time pressure P of first pressure gauge1' if the real-time pressure P of the first pressure gauge1The variation of' is within the set pressure variation range (or, the real-time pressure P of the first pressure gauge1Is equal to the initial pressure P1) If the first rotary valve is in a normal operation state, the real-time pressure P of the first pressure gauge is continuously observed1Variations of' are possible. If the real-time pressure P of the first pressure gauge1' the variation exceeds the set pressure variation range (or, the real-time pressure P of the first pressure gauge1' not equal to the initial pressure P1) And judging that the first rotary valve has air leakage.
In the present invention, the change of the real-time frequency of the fan motor of the first dust removal system in the set frequency change range means: real time frequency F1The value of' is the initial frequency F1In the range of 80-120% of the value, preferably the initial frequency F1In the range of 85-115% of the value, more preferably the initial frequency F1In the range of 90-110% of the value. I.e. the real-time frequency F1Values of' are (80-120%) F1Preferably the real-time frequency F1The value of' is (85-115%) F1More preferably the real-time frequency F1Values of' are (90-110%) F1Within the range of (1). Correspondingly, the change of the real-time frequency of the fan motor of the first dust removal system exceeds the set frequency change range, namely the change exceeds the range.
In the present invention, the real-time pressure P of the first pressure gauge1The variation of' within the set frequency variation range means: real time pressure P1The value of' is the initial pressure P1In the range of 80-120% of the value, preferably the initial pressure P1In the range of 85-115% of the value, more preferably the initial pressure P1In the range of 90-110% of the value. I.e. real time pressure P1A value of' P (80-120%)1Preferably the real-time pressure P1A value of' P (85-115%)1More preferably the real-time pressure P1A value of' P (90-110%)1Within the range of (1). Accordingly, the real-time pressure P of the first pressure gauge1The variation of' is beyond the set pressure variation range, that is, beyond the above range.
In the invention, the change of the reading of the first flowmeter in the set flow rate change range refers to that: real-time flow Q1The value of' is the initial flow rate Q1In the range of 80 to 120% of the value, preferably the initial flow rate Q1Within the range of 85-115% of the value, more preferably the initial flow rate Q1In the range of 90-110% of the value. I.e. real time traffic Q1A value of' is (80-120%). Q1Preferably the real-time flow rate Q1A value of' is (85-115%) Q1More preferably the real-time flow rate Q1A value of' is (90-110%) Q1Within the range of (1). Correspondingly, the real-time flow change of the first flow meter exceeds the set flow change range, namely the real-time flow change of the first flow meter exceeds the range.
By the method, whether the first rotary valve has the air leakage condition or not can be judged timely and accurately. The method provided by the invention can detect whether the vane of the first rotary valve is deformed without seeing the specific structure condition in the first rotary valve, namely, without seeing whether the vane in the first rotary valve is worn or not. Meanwhile, the severity of the air leakage of the first rotary valve can be judged through the change of any one parameter of the real-time frequency of a fan motor of the first dust removal system, the real-time pressure of the first pressure gauge or the real-time flow of the first flowmeter and the amplitude range of the change; the larger the change amplitude of any one of the three data is, the more serious the air leakage of the first rotary valve is; the smaller the amplitude of the change, the lighter the air leakage of the first rotary valve is, and even the air leakage is.
In the invention, the method for treating the leakage gas of the first rotary valve comprises the following steps: the flue gas to be leaked to the first conveyor is pumped away, so that the flue gas is prevented from corroding the first conveyor after entering the first conveyor for condensation, and further the flue gas is prevented from entering the first dust removal system, so that the first dust removal pipeline is prevented from being blocked and the first dust removal system is prevented from being corroded; meanwhile, the first external gas conveying pipeline conveys corresponding air quantity to be mixed with the leaked flue gas, so that the corrosion and blockage of the air suction pipeline (the pipeline conveying the flue gas to be leaked) due to flue gas condensation and condensation are avoided. In addition, the flue gas to be leaked and the gas conveyed by the first external gas conveying pipeline enter the adsorption tower through the original flue gas conveying pipeline for purification treatment, so that the pollution of the emission of the flue gas to the environment is also reduced.
In the embodiment of the invention for judging the air leakage of the rotary valve, the first pipeline led out from the blanking pipeline and the first external gas conveying pipeline are combined and then connected to the original flue gas conveying pipeline through the second pipeline. Preferably, the other end of the first external gas conveying pipeline is connected to a cooling section gas outlet of the desorption tower. Generally, a booster fan is arranged on the raw flue gas conveying pipeline, and the connection position of the first pipeline and the raw flue gas conveying pipeline is located at the upstream of the booster fan (the upstream is set according to the flow direction of the flue gas in the raw flue gas conveying pipeline). The invention utilizes the negative pressure at the inlet of the booster fan to extract the flue gas which is about to leak to the conveyor through the first pipeline, and simultaneously extracts the cooling air discharged from the gas outlet of the cooling section of the analysis tower through the first external gas conveying pipeline. Adjusting a first valve arranged on the first pipeline to recover the frequency of a fan motor of the first dust removal system to the initial frequency F under the condition that the value of the first pressure gauge is unchanged1(or return to the set range)Inner); or, adjusting a first valve arranged on the first pipeline, so that the reading of the first flowmeter is recovered to the initial flow Q under the condition that the value of the first pressure gauge is unchanged1(or return to within a set range); thereby prevented that the flue gas in the adsorption tower from revealing to first conveyer because the deformation of first rotary valve, also guaranteed the rationality of extraction amount of wind. Or, the first valve arranged on the first pipeline is adjusted, so that the value of the first pressure gauge is recovered to the initial pressure P under the condition that the frequency of a fan motor of the first dust removal system or the reading of the first flow meter is not changed1(or return to within a set range); thereby prevented that the flue gas in the adsorption tower from revealing to first conveyer because the deformation of first rotary valve, also guaranteed the rationality of extraction amount of wind.
Because the high-temperature active carbon in the desorption tower indirectly exchanges heat with cooling air in the cooling section, the temperature of the cooling air discharged from the gas outlet of the cooling section of the desorption tower is higher and is 100-130 ℃. In consideration of heat dissipation of the pipeline, the air volume of the extracted cooling air at the gas outlet of the cooling section of the desorption tower is controlled by adjusting the fourth valve arranged on the first external gas conveying pipeline, so that the temperature of the mixed gas obtained by mixing the cooling air at the outlet of the desorption tower and the flue gas leaked to the first conveyor is higher than the acid dew point of the mixed gas, namely the temperature of the mixed gas obtained by mixing the gas conveyed by the first external gas conveying pipeline and the flue gas conveyed by the first pipeline is higher than the acid dew point of the mixed gas, and the corrosion and blockage of the air suction pipeline due to condensation and condensation of the flue gas are avoided.
According to the relation, the acid dew point t of the flue gasld2'：
Figure GDA0003029903750000191
(wherein,
Figure GDA0003029903750000192
is the concentration of water vapor in the mixed gas,%;
Figure GDA0003029903750000193
concentration of sulfur trioxide in the mixed gas,%), it can be known that the acid dew point of the flue gas is related to the contents of the water vapor and sulfur trioxide in the flue gas, and after the flue gas to be leaked is mixed with the cooling air at the outlet of the desorption tower, the contents of the water vapor and sulfur trioxide in the mixed gas are reduced, and correspondingly, the acid dew point of the mixed gas is reduced. Therefore, in order to avoid the corrosion and blockage of the exhaust pipeline due to the condensation and the condensation of the flue gas, the fourth valve is adjusted to enable the temperature of the mixed gas to be higher than the acid dew point of the mixed gas, the acid dew point of the mixed gas is lower than the acid dew point of the flue gas to be leaked, and only the fourth valve is required to be adjusted to enable the temperature of the mixed gas to be higher than the acid dew point of the flue gas to be leaked, namely, the temperature of the mixed gas after the mixed gas of the gas conveyed by the first external gas conveying pipeline and the flue gas conveyed by the first pipeline is higher than the acid dew point of the flue gas conveyed by the first pipeline.
In the invention, the concentration of sulfur dioxide and the concentration of water vapor in the flue gas conveyed by the first pipeline are both measured by a first online flue gas analyzer of the activated carbon flue gas purification system. A first on-line flue gas analyzer is arranged on the feed line of the adsorption tower to measure the concentration of sulphur dioxide and water vapour in the flue gas at that location, i.e. to measure the concentration of sulphur dioxide and water vapour in the flue gas that is about to leak to the first conveyor. The concentration of sulfur trioxide in the flue gas can be obtained by measuring the concentration of sulfur dioxide in the flue gas, so that the acid dew point of the flue gas to be leaked to the first conveyor is calculated. And adjusting a third valve on the first external gas conveying pipeline, and controlling the cooling air quantity at the outlet of the extracted desorption tower, so that the temperature of the mixed gas, namely the reading of a thermometer on the second pipeline, is greater than the acid dew point of the flue gas to be leaked, and the corrosion and blockage of the air suction pipeline due to condensation and dewing of the flue gas are avoided.
In the present invention, the method for treating the first rotary valve blow-by gas may further be: the first pipeline and the first external gas conveying pipeline which are led out from the blanking pipeline are combined and then connected to the original smoke conveying pipeline through the second pipeline. The first external gas conveying pipeline is not connected with a gas outlet of the cooling section of the desorption tower, and directly conveys dilution gas (such as air) to dilute the flue gas to be leaked. According to the invention, the air quantity of the diluent gas is controlled by adjusting the third valve arranged on the first external gas conveying pipeline, so that the acid dew point of the mixed gas obtained by mixing the cold air conveyed by the first external gas conveying pipeline and the flue gas conveyed by the first pipeline is lower than the ambient temperature, and the corrosion and blockage of the air suction pipeline due to condensation and condensation of the flue gas are avoided.
And obtaining the dilution multiple n2 of the cold air conveyed by the first external gas conveying pipeline to the flue gas conveyed by the fourth pipeline according to the condition that the acid dew point of the mixed gas is lower than the ambient temperature. Because the content of CO in the flue gas is relatively fixed, and the atmosphere contains almost no CO (or the content of CO is very little) and can be ignored, the concentration C of CO in the mixed gasCO2' that is, the concentration C of CO in the flue gas conveyed by the fourth pipelineCO2Concentration after dilution by n2 times, i.e. CCO2’＝CCO2And/n 2. Adjusting a third valve on the first external gas conveying pipeline, and controlling the air volume of the conveyed cold air to ensure that the reading of the first CO detector on the second pipeline is CCO2' so as to realize that the acid dew point of the mixed gas is lower than the ambient temperature and avoid the corrosion and blockage of the exhaust pipeline caused by the condensation and the dewing of the flue gas.
In addition, due to CO in the flue gas2Is also relatively constant and contains atmospheric CO2The content of (A) is also very low, and is 0.03-0.04% (volume ratio), which can be ignored. Therefore, in an embodiment of the present invention, the first detection means provided on the second pipeline is replaced with the first CO2The detector can also realize the technical scheme.
In the invention, the concentration of sulfur dioxide and the concentration of water vapor in the flue gas conveyed by the first pipeline and the concentration of CO (or CO) in the flue gas conveyed by the fourth pipeline2) The concentrations of (a) and (b) are all measured by a first on-line flue gas analyzer of the activated carbon flue gas purification system.
In the invention, the frequency of the fan motor of the first dust removal system can be obtained by displaying the fan motor. The first flow meter detects the flow rate of the gas in the delivery pipe (i.e., the third pipe) connecting the first conveyor and the first dust removal system. The first pressure gauge is used for detecting the pressure value of gas circulation in the first conveyor. First pipeline is used for carrying the flue gas that will reveal above the rotary valve to former flue gas pipeline, avoids revealing of first rotary valve. The first external gas conveying pipeline is used for mixing with the flue gas in the first pipeline, and the mixed flue gas is combined and conveyed to the original flue gas conveying pipeline through the second pipeline. The first external gas is used for adjusting the temperature of the mixed gas in the second pipeline, so that the temperature of the mixed gas is higher than the acid dew point temperature of the mixed gas; or adjusting the acid dew point temperature of the mixed gas in the second pipeline to enable the acid dew point temperature of the mixed gas to be lower than the ambient temperature; thereby avoiding the corrosion of the pipeline for conveying the mixed gas.
That is, when the second rotary valve at the top of the adsorption tower is judged to leak gas, the negative pressure at the inlet of the booster fan can be utilized to extract the flue gas to be leaked to the second conveyor through the fourth pipeline, and the second valve arranged on the fourth pipeline is adjusted to ensure the reasonability of the amount of the flue gas to be leaked; meanwhile, cooling air discharged from a cooling section gas outlet of the desorption tower is extracted through the second external gas conveying pipeline, a fourth valve arranged on the second external gas conveying pipeline is adjusted to control the amount of cooling air mixed into the leaked flue gas, and the temperature of mixed gas obtained by mixing the gas conveyed by the second external gas conveying pipeline and the flue gas conveyed by the fourth pipeline is higher than the acid dew point of the flue gas conveyed by the fourth pipeline by utilizing the waste heat adjustment of the cooling air of the desorption tower, so that the corrosion and blockage of the air pumping pipeline due to flue gas condensation and condensation are avoided. In addition, when judging the second rotary valve gas leakage, the second export gas conveying pipeline also can not be connected with the cooling section gas outlet of analytic tower, and direct transport diluent gas (for example air) dilutes the flue gas that will leak, adjust the fourth valve that sets up on the export gas conveying pipeline of second, come the control and carry the volume of diluent gas for the mixed gas's of cold wind that the export gas conveying pipeline of second mixes with flue gas that the fourth pipeline carried acid dew point of both is less than ambient temperature, can avoid the exhaust pipeline to take place the corruption jam because of flue gas condensation dewfall equally.
Correspondingly, when the first rotary valve at the bottom of the adsorption tower is judged to leak gas, the negative pressure at the inlet of the booster fan can be utilized to extract the flue gas to be leaked to the first conveyor through the first pipeline, and the first valve arranged on the first pipeline is adjusted to ensure the reasonability of the amount of the leaked flue gas; meanwhile, cooling air discharged from a cooling section gas outlet of the desorption tower is extracted through the first external gas conveying pipeline, a third valve arranged on the first external gas conveying pipeline is adjusted to control the amount of cooling air mixed into the leaked flue gas, and the temperature of mixed gas obtained after mixing of the gas conveyed by the first external gas conveying pipeline and the flue gas conveyed by the first pipeline is higher than the acid dew point of the flue gas conveyed by the first pipeline by utilizing the waste heat adjustment of the cooling air of the desorption tower, so that the phenomenon that the air pumping pipeline is corroded and blocked due to condensation and condensation of the flue gas is avoided. Similarly, when the first rotary valve is used for judging the air leakage, the first external gas conveying pipeline can also be not connected with a cooling section gas outlet of the desorption tower, and directly conveys diluent gas (such as air) to dilute the flue gas to be leaked, and the third valve arranged on the first external gas conveying pipeline is adjusted to control the quantity of the conveyed diluent gas, so that the acid dew point of the mixed gas obtained by mixing the cold air conveyed by the first external gas conveying pipeline and the flue gas conveyed by the first pipeline is lower than the ambient temperature, and the corrosion and blockage of the air pumping pipeline due to condensation and condensation of the flue gas can also be avoided.
In the present invention, the rotary valve and the discharge valve are common and are the same component. The adsorption tower is universal to a desulfurizing tower, a denitration tower and a desulfurizing and denitrating tower. The desorption tower and the regeneration tower are commonly used. The conveyer is an active carbon conveying device, and can be conveying equipment such as a conveying belt and the like for conveying active carbon. The conveyor is provided with a gas inlet for gas circulation in the conveyor, and the design is the existing design. The dust removing system can adopt any existing dust removing equipment. The pressure gauge is used for detecting the pressure of the air flow in the conveyor.
In the present invention, the height of the adsorption column is 5 to 80m, preferably 8 to 60m, and more preferably 10 to 40 m.
The height of the stripping column is from 5 to 80m, preferably from 8 to 60m, more preferably from 10 to 40 m.
The outer diameter of the first rotary valve is 0.1 to 5m, preferably 0.2 to 3m, more preferably 0.3 to 2m, and still more preferably 0.4 to 1 m.
The outer diameter of the second rotary valve is 0.1 to 5m, preferably 0.2 to 3m, more preferably 0.3 to 2m, and still more preferably 0.4 to 1 m.
The diameter of the sixth duct (the duct for transporting the flue gas downstream of the second rotary valve material) is 10-1000mm, preferably 20-800mm, further preferably 30-500mm, more preferably 50-300 mm.
The diameter of the third duct (the duct for conveying the flue gas upstream of the first rotary valve material) is 10-1000mm, preferably 20-800mm, further preferably 30-500mm, more preferably 50-300 mm.
In the present application, "upstream" and "downstream" are set according to the flow direction of the activated carbon in the adsorption column. The "top" and "bottom" are set according to the height direction of the apparatus or device.
Compared with the prior art, the invention has the following beneficial technical effects:
1. the method of the invention controls the frequency of a fan motor of a dust removal system connected with a conveyor or the gas flow in a pipeline connecting the conveyor and the dust removal system and the condition of pressure change in the conveyor to judge whether a rotary valve at the top of an adsorption tower or a rotary valve at the bottom of the adsorption tower is in a normal working state; the method is simple to operate, and can effectively judge whether the rotary valve leaks air or not;
2. aiming at the condition of air leakage of the rotary valve, the method provided by the invention can be used for pumping away the flue gas to be leaked to the conveyor, simultaneously ensuring the reasonability of the air pumping quantity, preventing the flue gas from corroding the conveyor after the flue gas enters the conveyor for condensation, further preventing the flue gas from entering a dust removal system to cause blockage of a dust removal pipeline and the dust removal system, and reducing the environmental pollution;
3. according to the method, when the flue gas to be leaked to the conveyor is extracted, the corresponding air quantity is conveyed through the external gas conveying pipeline to be mixed with the flue gas to be leaked, so that the corrosion and blockage of the air extraction pipeline caused by flue gas condensation and condensation are avoided;
4. the method effectively utilizes the cooling air discharged from the gas outlet of the cooling section of the desorption tower, reasonably utilizes the waste heat resources of the part of the cooling air, and simultaneously reduces the environmental pollution;
5. the system has simple structure, low investment cost and obvious effect, and does not need to invest complicated pipeline equipment and reaction devices.
Drawings
FIG. 1 is a schematic view of a rotary valve;
FIG. 2 is a schematic structural diagram of an activated carbon flue gas treatment system in the prior art;
FIG. 3 is a schematic structural diagram of a system for determining and treating gas leakage of a rotary valve at the top of an adsorption tower according to the present invention;
FIG. 4 is a schematic structural diagram of a system for determining and treating gas leakage of a rotary valve at the top of an adsorption tower according to another embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a system for determining and treating gas leakage from a rotary valve at the top and a rotary valve at the bottom of an adsorption tower according to the present invention;
fig. 6 is a schematic structural diagram of another system for determining and treating gas leakage from a rotary valve at the top and a rotary valve at the bottom of an adsorption tower according to the present invention.
Reference numerals: 1: an adsorption tower; 201: a first rotary valve; 202: a second rotary valve; 301: a first conveyor; 302: a second conveyor; 401: a first dust removal system; 402: a second dust removal system; 501: a first pressure gauge; 502: a second pressure gauge; 601: a first valve; 602: a second valve; 7: a resolution tower; 701: a cooling section gas outlet; 801: a third valve; 802: a fourth valve; 901: a first thermometer; 902: a second thermometer; 1001: first CO (or CO)2) A detector; 1002: second CO (or CO)2) A detector; 1101: a first flow meter; 1102: a second flow meter; 1201: a first online flue gas analyzer; 1202: a second on-line flue gas analyzer;
l0: an original flue gas conveying pipeline; l1: a first conduit; l2: a first external gas delivery duct; l3: a second conduit; l4: a third pipeline; l5: a blanking pipeline; l6: a fourth conduit; l7: a second incoming gas delivery conduit; l8: a fifth pipeline; l9: a sixth pipeline; l10: a feed line.
Detailed Description
According to a first embodiment of the present invention, a system for determining a leak in a rotary valve is provided.
A system for judging and treating gas leakage of a rotary valve comprises an adsorption tower 1, an analytical tower 7, a second rotary valve 202, a second conveyor 302, a second dust removal system 402, a second pressure gauge 502, an original flue gas conveying pipeline L0 and a sixth pipeline L9. Wherein the raw flue gas duct L0 is connected to the flue gas inlet of the adsorption tower 1. The second conveyor 302 connects the activated carbon outlet of the desorption column 7 and the activated carbon inlet of the adsorption column 1. The activated carbon inlet of the adsorption tower 1 is provided with a second rotary valve 202. The second dust removal system 402 is connected to the second conveyor 302 through a sixth conduit L9. A second pressure gauge 502 is provided on the second conveyor 302.
Preferably, the sixth line L9 is provided with a second flow meter 1102.
According to a second embodiment of the present invention, a system for treating rotary valve blow-by is provided. The system comprises the system described in the first embodiment, and further comprises: a feed line L10 is provided between the activated carbon inlet of the adsorption tower 1 and the second conveyor 302. The second rotary valve 202 is provided on the feed line L10. A fourth line L6, which leads from the feed line L10 downstream of the second rotary valve 202, is combined with a second foreign gas transfer line L7 and connected via a fifth line L8 to the raw flue gas transfer line L0.
Preferably, a second valve 602 is provided in the fourth pipe L6.
Preferably, the second external gas delivery pipe L7 is provided with a fourth valve 802.
Preferably, the fifth pipeline L8 is provided with a second detection device.
Preferably, the second detection device is a second thermometer 902 or a second CO (or CO)2) And a detector 1002.
Preferably, the feed line L10 is provided with a second on-line flue gas analyzer 1202.
Preferably, the other end of the second external gas transport pipe L7 is connected to the cooling stage gas outlet 701 of the desorption tower 7.
According to a third embodiment of the present invention, a system for determining a leak in a rotary valve is provided. The system includes the judgment system described in the first embodiment, and further includes: a first rotary valve 201, a first conveyor 301, a first dust removal system 401, a first pressure gauge 501, and a third pipeline L4. Wherein the first conveyor 301 connects the activated carbon outlet of the adsorption tower 1 and the activated carbon inlet of the desorption tower 7. The activated carbon outlet of the adsorption tower 1 is provided with a first rotary valve 201. The first dust removing system 401 is connected to the first conveyor 301 through a third duct L4. The first conveyor 301 is provided with a first pressure gauge 501.
Preferably, the third line L4 is provided with a first flow meter 1101.
According to a fourth embodiment of the present invention, a system for treating rotary valve blow-by is provided. The system includes the system described in the second and third embodiments above, and further includes: a blanking pipeline L5 is arranged between the active carbon outlet of the adsorption tower 1 and the first conveyor 301. The first rotary valve 201 is provided on the blanking line L5. The first pipeline L1 led out from the blanking pipeline L5 upstream of the first rotary valve 201 is merged with the first foreign gas transport pipeline L2 and then connected to the raw flue gas transport pipeline L0 via the second pipeline L3.
Preferably, the first pipe L1 is provided with a first valve 601.
Preferably, third valve 801 is provided on first foreign gas delivery pipe L2.
Preferably, the second duct L3 is provided with a first detection device.
Preferably, the first detection device is a first thermometer 901 or a first CO (or CO)2) A detector 1001.
Preferably, the first on-line flue gas analyzer 1201 is arranged on the blanking pipeline L5.
Preferably, the other end of the first external gas transfer pipe L2 is connected to the cooling stage gas outlet 701 of the desorption tower 7.
In the present invention, the height of the adsorption column is 5 to 80m, preferably 8 to 60m, and more preferably 10 to 40 m.
The height of the stripping column is from 5 to 80m, preferably from 8 to 60m, more preferably from 10 to 40 m.
The outer diameter of the first rotary valve is 0.1 to 5m, preferably 0.2 to 3m, more preferably 0.3 to 2m, and still more preferably 0.4 to 1 m.
The outer diameter of the second rotary valve is 0.1 to 5m, preferably 0.2 to 3m, more preferably 0.3 to 2m, and still more preferably 0.4 to 1 m.
The diameter of the sixth duct (the duct for transporting the flue gas downstream of the second rotary valve material) is 10-1000mm, preferably 20-800mm, further preferably 30-500mm, more preferably 50-300 mm.
The diameter of the third duct (the duct for conveying the flue gas upstream of the first rotary valve material) is 10-1000mm, preferably 20-800mm, further preferably 30-500mm, more preferably 50-300 mm.
Example 1
A method for judging leakage of a rotary valve comprises the following steps:
1) the flue gas enters the adsorption tower 1 through a raw flue gas conveying pipeline L0, and is adsorbed and purified by activated carbon in the adsorption tower 1 and then discharged; the activated carbon adsorbing the pollutants in the flue gas enters a first conveyor 301 through a first rotary valve 201 at the bottom of the adsorption tower 1, and the first conveyor 301 conveys the activated carbon to an analytical tower 7 for analysis and regeneration; the activated carbon desorbed by the desorption tower 7 enters the second conveyor 302, and enters the adsorption tower 1 through the second rotary valve 202 at the top of the adsorption tower 1;
2) at the beginning of the commissioning of the second rotary valve 202, the initial frequency F of the fan motor of the second dust removal system 402 connected to the second conveyor 302 is recorded2And recording the initial pressure P of a second pressure gauge 502 provided on the second conveyor 302 and upstream of the second rotary valve 2022；
3) The second rotary valve 202 is continuously operated to keep the value of the second pressure gauge 502 constant at the initial pressure P2Observe the real-time frequency F of the fan motor of the second dust pelletizing system 4022'; if the real-time frequency F of the fan motor of the second dust pelletizing system 402 is2Is equal to the initial frequency F2If so, the second rotary valve 202 is in a normal operation state and continues to observe; if the real-time frequency F of the fan motor of the second dust pelletizing system 402 is2' not equal to the initial frequency F2Then the second rotary valve 202 is determined to be leaking.
Example 2
A method for judging leakage of a rotary valve comprises the following steps:
1) the flue gas enters the adsorption tower 1 through a raw flue gas conveying pipeline L0, and is adsorbed and purified by activated carbon in the adsorption tower 1 and then discharged; the activated carbon adsorbing the pollutants in the flue gas enters a first conveyor 301 through a first rotary valve 201 at the bottom of the adsorption tower 1, and the first conveyor 301 conveys the activated carbon to an analytical tower 7 for analysis and regeneration; the activated carbon desorbed by the desorption tower 7 enters the second conveyor 302, and enters the adsorption tower 1 through the second rotary valve 202 at the top of the adsorption tower 1;
2) at the beginning of the commissioning of the second rotary valve 202, the initial flow Q of the second flow meter 1102 on the conveying pipe connecting the second conveyor 302 and the second dust removal system 402 is recorded2And recording the initial pressure P of a second pressure gauge 502 provided on the second conveyor 302 and upstream of the second rotary valve 2022；
3) The second rotary valve 202 is continuously operated to keep the value of the second pressure gauge 502 constant at the initial pressure P2Observe the real-time flow Q of the second flow meter 11022'; if the real-time flow rate Q of the second flow meter 11022Is equal to the initial flow rate Q2If so, the second rotary valve 202 is in a normal operation state and continues to observe; if the real-time flow rate Q of the second flow meter 11022' not equal to initial flow Q2Then the second rotary valve 202 is determined to be leaking.
Example 3
A method for judging leakage of a rotary valve comprises the following steps:
1) the flue gas enters the adsorption tower 1 through a raw flue gas conveying pipeline L0, and is adsorbed and purified by activated carbon in the adsorption tower 1 and then discharged; the activated carbon adsorbing the pollutants in the flue gas enters a first conveyor 301 through a first rotary valve 201 at the bottom of the adsorption tower 1, and the first conveyor 301 conveys the activated carbon to an analytical tower 7 for analysis and regeneration; the activated carbon desorbed by the desorption tower 7 enters the second conveyor 302, and enters the adsorption tower 1 through the second rotary valve 202 at the top of the adsorption tower 1;
2) at the second placeThe initial frequency F of the fan motor of the second dust pelletizing system 402 connected to the second conveyor 302 is recorded during the initial period of operation of the rotary valve 2022And recording the initial pressure P of a second pressure gauge 502 provided on the second conveyor 302 and upstream of the second rotary valve 2022；
3) The second rotary valve 202 is continuously operated to keep the frequency of the fan motor of the second dust removing system 402 from changing to the initial frequency F2Observe the real-time pressure P of the second manometer 5022'; if the real-time pressure P of the second pressure gauge 5022Is equal to the initial pressure P2If so, the second rotary valve 202 is in a normal operation state and continues to observe; if the real-time pressure P of the second pressure gauge 5022' not equal to the initial pressure P2Then the second rotary valve 202 is determined to be leaking.
Example 4
A method for judging leakage of a rotary valve comprises the following steps:
1) the flue gas enters the adsorption tower 1 through a raw flue gas conveying pipeline L0, and is adsorbed and purified by activated carbon in the adsorption tower 1 and then discharged; the activated carbon adsorbing the pollutants in the flue gas enters a first conveyor 301 through a first rotary valve 201 at the bottom of the adsorption tower 1, and the first conveyor 301 conveys the activated carbon to an analytical tower 7 for analysis and regeneration; the activated carbon desorbed by the desorption tower 7 enters the second conveyor 302, and enters the adsorption tower 1 through the second rotary valve 202 at the top of the adsorption tower 1;
2) at the beginning of the commissioning of the second rotary valve 202, the initial flow Q of the second flow meter 1102 on the conveying pipe connecting the second conveyor 302 and the second dust removal system 402 is recorded2And recording the initial pressure P of a second pressure gauge 502 provided on the second conveyor 302 and upstream of the second rotary valve 2022；
3) The second rotary valve 202 continues to operate to keep the flow of the second flow meter 1102 from changing to the initial flow Q2Observe the real-time pressure P of the second manometer 5022'; if the real-time pressure P of the second pressure gauge 5022Is equal to the initial pressure P2If so, the second rotary valve 202 is in a normal operation state and continues to observe; if the second pressure isReal-time pressure P of force meter 5022' not equal to the initial pressure P2Then the second rotary valve 202 is determined to be leaking.
Example 5
Example 1 was repeated except that step 3) was: the second rotary valve 202 is continuously operated to keep the value of the second pressure gauge 502 constant at the initial pressure P2Observe the real-time frequency F of the fan motor of the second dust pelletizing system 4022'; if the real-time frequency F of the fan motor of the second dust pelletizing system 402 is2The value of' being at an initial frequency F2Within the range of 80-120% of the value, the second rotary valve 202 is in a normal operating state and continues to observe; if the real-time frequency F of the fan motor of the second dust pelletizing system 402 is2The value of' exceeds the initial frequency F2A range of 80-120% of the value, the second rotary valve 202 is judged to be leaking.
Example 6
Example 2 was repeated except that step 3) was: the second rotary valve 202 is continuously operated to keep the value of the second pressure gauge 502 constant at the initial pressure P2Observe the real-time flow Q of the second flow meter 11022'; if the real-time flow rate Q of the second flow meter 11022The value of' being at the initial flow rate Q2Within the range of 80-120% of the value, the second rotary valve 202 is in a normal operating state and continues to observe; if the real-time flow rate Q of the second flow meter 11022' the value exceeds the initial flow rate Q2A range of 80-120% of the value, the second rotary valve 202 is judged to be leaking.
Example 7
Example 3 was repeated except that step 3) was: the second rotary valve 202 is continuously operated to keep the frequency of the fan motor of the second dust removing system 402 from changing to the initial frequency F2(ii) a If the real-time pressure P of the second pressure gauge 5022At an initial pressure P2Within the range of 80-120% of the value, the second rotary valve 202 is in a normal operating state and continues to observe; if the real-time pressure P of the second pressure gauge 5022' the value exceeds the initial pressure P2A range of 80-120% of the value, the second rotary valve 202 is judged to be leaking.
Example 8
Example 4 was repeated except that step 3) was: the second rotary valve 202 continues to operate to keep the flow of the second flow meter 1102 from changing to the initial flow Q2Observe the real-time pressure P of the second manometer 5022'; if the real-time pressure P of the second pressure gauge 5022At an initial pressure P2Within the range of 80-120% of the value, the second rotary valve 202 is in a normal operating state and continues to observe; if the real-time pressure P of the second pressure gauge 5022' the value exceeds the initial pressure P2A range of 80-120% of the value, the second rotary valve 202 is judged to be leaking.
Example 9
A method of treating rotary valve blow-by or a method of treating blow-by from the second rotary valve 202 described in example 1, the method further comprising the steps of:
4) a fourth pipeline L6 is additionally arranged between the top of the adsorption tower 1 and the second rotary valve 202, and the flue gas at the lower part of the second rotary valve 202 is mixed with the gas conveyed by the second external gas conveying pipeline L7 through the fourth pipeline L6 and then conveyed to the original flue gas conveying pipeline L0;
5) the second valve 602 provided on the fourth pipe L6 is adjusted such that the real-time frequency F of the fan motor of the second dust pelletizing system 402 is2' restore to equal the initial frequency F2。
Example 10
A method of treating rotary valve blow-by or a method of treating blow-by from the second rotary valve 202 described in example 2, the method further comprising the steps of:
4) a fourth pipeline L6 is additionally arranged between the top of the adsorption tower 1 and the second rotary valve 202, and the flue gas at the lower part of the second rotary valve 202 is mixed with the gas conveyed by the second external gas conveying pipeline L7 through the fourth pipeline L6 and then conveyed to the original flue gas conveying pipeline L0;
5) the second valve 602 provided on the fourth pipe L6 is adjusted so that the real-time flow rate Q of the second flow meter 11022' restore to equal initial flow Q2。
Example 11
A method of treating rotary valve blow-by or a method of treating blow-by from the second rotary valve 202 of embodiments 3 or 4, the method further comprising the steps of:
4) a fourth pipeline L6 is additionally arranged between the top of the adsorption tower 1 and the second rotary valve 202, and the flue gas at the lower part of the second rotary valve 202 is mixed with the gas conveyed by the second external gas conveying pipeline L7 through the fourth pipeline L6 and then conveyed to the original flue gas conveying pipeline L0;
5) the second valve 602 provided on the fourth pipe L6 is adjusted so that the real-time pressure P of the second pressure gauge 5022' Return to equal initial pressure P2。
Example 12
A method of treating rotary valve blow-by or a method of treating blow-by from the second rotary valve 202 described in example 5, the method further comprising the steps of:
4) a fourth pipeline L6 is additionally arranged between the top of the adsorption tower 1 and the second rotary valve 202, and the flue gas at the lower part of the second rotary valve 202 is mixed with the gas conveyed by the second external gas conveying pipeline L7 through the fourth pipeline L6 and then conveyed to the original flue gas conveying pipeline L0;
5) adjusting a second valve (602) disposed on a fourth conduit (L6) such that a real-time frequency F of a fan motor of the second dust pelletizing system (402)2The value of' is restored to be at the initial frequency F2The value is in the range of 80-120%.
Example 13
A method of treating rotary valve blow-by or a method of treating blow-by from the second rotary valve 202 of example 6, the method further comprising the steps of:
4) a fourth pipeline L6 is additionally arranged between the top of the adsorption tower 1 and the second rotary valve 202, and the flue gas at the lower part of the second rotary valve 202 is mixed with the gas conveyed by the second external gas conveying pipeline L7 through the fourth pipeline L6 and then conveyed to the original flue gas conveying pipeline L0;
5) the second valve 602 provided in the fourth line L6 is adjusted to regulate the real-time flow Q of the second flowmeter 11022' the value is restored to the value at the initial flow rate Q2The value is in the range of 80-120%.
Example 14
A method of treating rotary valve blow-by or a method of treating blow-by from the second rotary valve 202 of embodiments 7 or 8, the method further comprising the steps of:
4) a fourth pipeline L6 is additionally arranged between the top of the adsorption tower 1 and the second rotary valve 202, and the flue gas at the lower part of the second rotary valve 202 is mixed with the gas conveyed by the second external gas conveying pipeline L7 through the fourth pipeline L6 and then conveyed to the original flue gas conveying pipeline L0;
5) adjusting a second valve (602) disposed on the fourth conduit (L6) such that a real-time pressure P of the second pressure gauge (502) is2' the value is restored to the initial pressure P2The value is in the range of 80-120%.
Example 15
Example 9 is repeated except that the method further comprises the steps of:
6a) the other end of the second external gas conveying pipeline L7 is connected to the cooling section gas outlet 701 of the desorption tower 7, and the fourth valve 802 arranged on the second external gas conveying pipeline L7 is adjusted, so that the temperature of the mixed gas of the flue gas conveyed by the fourth pipeline L6 and the gas conveyed by the second external gas conveying pipeline L7 is higher than the acid dew point of the flue gas conveyed by the fourth pipeline L6.
The flue gas conveyed by the fourth pipeline L6 and the gas conveyed by the second external gas conveying pipeline L7 are mixed and then conveyed to the original flue gas conveying pipeline L0 through a fifth pipeline L8, and a second thermometer 902 is arranged on the fifth pipeline L8; the second thermometer 902 detects the temperature of the mixed gas in the pipe at the corresponding position on line.
In step 6a), the fourth valve 802 arranged on the second external gas conveying pipeline L7 is adjusted, so that the temperature of the mixed gas obtained by mixing the flue gas conveyed by the fourth pipeline L6 and the gas conveyed by the second external gas conveying pipeline L7 is higher than the acid dew point of the flue gas conveyed by the fourth pipeline L6, specifically:
calculating the concentration of sulfur trioxide in the flue gas conveyed by the fourth pipeline L6: the concentration of sulfur dioxide in the flue gas conveyed by the fourth pipeline L6 is measured to be
Figure GDA0003029903750000281
0.01%, whereby the fourthConcentration of sulfur trioxide in flue gas delivered by pipeline L6
Figure GDA0003029903750000282
Comprises the following steps:
Figure GDA0003029903750000283
in the formula (1), k is a constant and k is 1.5%;
secondly, calculating the acid dew point of the flue gas conveyed by the fourth pipeline L6: the concentration of water vapor in the flue gas fed through the fourth pipeline L6 was measured to be
Figure GDA0003029903750000284
8%, the acid dew point t of the flue gas fed via the fourth line L6 can thus be determinedld2Comprises the following steps:
Figure GDA0003029903750000285
in the formula (4), the reaction mixture is,
Figure GDA0003029903750000286
concentration,%, of water vapor in the flue gas delivered by the fourth conduit L6;
Figure GDA0003029903750000287
is the concentration,%, of sulfur trioxide in the flue gas delivered by the fourth pipeline L6;
the fourth valve 802 on the second incoming gas delivery line L7 was adjusted so that the second thermometer 902 on the fifth line L8 read 115 ℃.
Example 16
Example 11 is repeated, except that the method further comprises the steps of:
6b) the fourth valve 802 arranged on the second external gas conveying pipeline L7 is adjusted, so that the acid dew point of the mixed gas after the flue gas conveyed by the fourth pipeline L6 and the gas conveyed by the second external gas conveying pipeline L7 are mixed is lower than the ambient temperature.
The flue gas conveyed by the fourth pipeline L6 and the gas conveyed by the second external gas conveying pipeline L7 are mixed and then conveyed to the original flue gas conveying pipeline L0 through a fifth pipeline L8, and a second CO detector 1002 is arranged on the fifth pipeline L8; the second CO detector 1002 detects the concentration of CO in the mixed gas in the pipeline at the corresponding position on line.
In step 6b), the fourth valve 802 arranged on the second external gas conveying pipeline L7 is adjusted, so that the acid dew point of the mixed gas obtained by mixing the flue gas conveyed by the fourth pipeline L6 and the gas conveyed by the second external gas conveying pipeline L7 is lower than the ambient temperature, specifically:
calculating the concentration of sulfur trioxide in the flue gas conveyed by the fourth pipeline L6: the concentration of sulfur dioxide in the flue gas conveyed by the fourth pipeline L6 is measured to be
Figure GDA0003029903750000291
Is 0.005%, whereby the concentration of sulfur trioxide in the flue gas delivered by the fourth conduit L6
Figure GDA0003029903750000292
Comprises the following steps:
Figure GDA0003029903750000293
in the formula (1), k is a constant and k is 1%;
calculating the acid dew point of the mixed gas obtained by mixing the flue gas conveyed by the fourth pipeline L6 and the gas conveyed by the second external gas conveying pipeline L7: the concentration of water vapor in the flue gas fed through the fourth pipeline L6 was measured to be
Figure GDA0003029903750000294
At 10%, the dilution ratio of the gas delivered by the second external gas delivery pipeline L7 to the flue gas delivered by the fourth pipeline L6 is n2, so that the acid dew point t of the mixed gas isld2' is:
Figure GDA0003029903750000295
in the formula (8), the reaction mixture is,
Figure GDA0003029903750000296
is the concentration of water vapor in the mixed gas,%;
Figure GDA0003029903750000297
is the concentration of sulfur trioxide in the mixed gas,%;
thirdly, according to the measured ambient temperature tEnvironment(s)The acid dew point of the mixed gas obtained by mixing the flue gas conveyed by the fourth pipeline L6 and the gas conveyed by the second external gas conveying pipeline L7 is lower than the ambient temperature, so that:
tld2'＜tenvironment(s)；………(9)；
According to the formula (9), the dilution multiple n2 of the gas conveyed by the second external gas conveying pipeline L7 to the flue gas conveyed by the fourth pipeline L6 is 40;
fourthly, calculating the concentration of CO in the mixed gas obtained by mixing the flue gas conveyed by the fourth pipeline L6 and the gas conveyed by the second external gas conveying pipeline L7:
the CO concentration in the flue gas conveyed by the fourth pipeline L6 is measured to be CCO20.4%, whereby the concentration C of CO in the mixed gas in the fifth line L8CO2' is:
CCO2’＝CCO2/n2＝0.1％；………(10)；
the fourth valve 802 on the second incoming gas delivery line L7 was adjusted so that the second CO detector 1002 on the fifth line L8 read 1000 ppm.
Example 17
Example 1 was repeated except that the process further included the following steps:
7) at the beginning of the commissioning of the first rotary valve 201, the initial frequency F of the fan motor of the first dust removal system 401 connected to the first conveyor 301 is recorded1Or recording the initial flow rate Q of the first flow meter 1101 on the conveying pipeline connecting the first conveyor 301 and the first dust removal system 4021And a recording medium provided on the first conveyor 301 and located on the first rotary valve 201 initial pressure P of the first pressure gauge 501 downstream1；
8) The first rotary valve 201 is continuously operated to keep the value of the first pressure gauge 501 constant to the initial pressure P1Observe the real-time frequency F of the fan motor of the first dust pelletizing system 4011'; if the real-time frequency F of the fan motor of the first dust pelletizing system 401 is1Is equal to the initial frequency F1If yes, the first rotary valve 201 is in a normal operation state, and observation is continued; if the real-time frequency F of the fan motor of the first dust pelletizing system 401 is1' not equal to the initial frequency F1Then the first rotary valve 201 is judged to be leaking.
Example 18
Example 2 was repeated except that the method further included the steps of:
7) at the beginning of the commissioning of the first rotary valve 201, the initial frequency F of the fan motor of the first dust removal system 401 connected to the first conveyor 301 is recorded1Or recording the initial flow rate Q of the first flow meter 1101 on the conveying pipeline connecting the first conveyor 301 and the first dust removal system 4021And recording the initial pressure P of a first pressure gauge 501 arranged on the first conveyor 301 and downstream of the first rotary valve 2011；
8) The first rotary valve 201 is continuously operated to keep the value of the first pressure gauge 501 constant to the initial pressure P1Observe the real-time flow rate Q of the first flow meter 11011'; if the real-time flow rate Q of the first flow meter 11011Is equal to the initial flow rate Q1If yes, the first rotary valve 201 is in a normal operation state, and observation is continued; if the real-time flow rate Q of the first flow meter 11011' not equal to initial flow Q1Then the first rotary valve 201 is judged to be leaking.
Example 19
Example 3 was repeated except that the method further included the steps of:
7) at the beginning of the commissioning of the first rotary valve 201, the initial frequency F of the fan motor of the first dust removal system 401 connected to the first conveyor 301 is recorded1Or recording the first flow meter 11 on the conveying pipe connecting the first conveyor 301 and the first dust removal system 40201 initial flow rate Q1And recording the initial pressure P of a first pressure gauge 501 arranged on the first conveyor 301 and downstream of the first rotary valve 2011；
8) The first rotary valve 201 is continuously operated to keep the fan motor frequency of the first dust removing system 401 from changing to the initial frequency F1Observe the real-time pressure P of the first pressure gauge 5011'; if the real-time pressure P of the first pressure gauge 5011Is equal to the initial pressure P1If yes, the first rotary valve 201 is in a normal operation state, and observation is continued; if the real-time pressure P of the first pressure gauge 5011' not equal to the initial pressure P1Then the first rotary valve 201 is judged to be leaking.
Example 20
Example 4 was repeated except that the method further included the steps of:
7) at the beginning of the commissioning of the first rotary valve 201, the initial frequency F of the fan motor of the first dust removal system 401 connected to the first conveyor 301 is recorded1Or recording the initial flow rate Q of the first flow meter 1101 on the conveying pipeline connecting the first conveyor 301 and the first dust removal system 4021And recording the initial pressure P of a first pressure gauge 501 arranged on the first conveyor 301 and downstream of the first rotary valve 2011；
8) The first rotary valve 201 is continuously operated to keep the flow rate of the first flow meter 1101 from becoming the initial flow rate Q1Observe the real-time pressure P of the first pressure gauge 5011'; if the real-time pressure P of the first pressure gauge 5011Is equal to the initial pressure P1If yes, the first rotary valve 201 is in a normal operation state, and observation is continued; if the real-time pressure P of the first pressure gauge 5011' not equal to the initial pressure P1Then the first rotary valve 201 is judged to be leaking.
Example 21
Example 17 was repeated except that step 8) was: the first rotary valve 201 is continuously operated to keep the value of the first pressure gauge 501 constant to the initial pressure P1Observe the real-time frequency F of the fan motor of the first dust pelletizing system 4011'; if the fan motor of the first dust removing system 401Real time frequency F1The value of' being at an initial frequency F1Within the range of 80-120% of the value, the first rotary valve 201 is in a normal operation state, and observation is continued; if the real-time frequency F of the fan motor of the first dust pelletizing system 401 is1The value of' exceeds the initial frequency F1The range of 80-120% of the value, it is determined that the first rotary valve 201 is leaking.
Example 22
Example 18 was repeated except that step 8) was: the first rotary valve 201 is continuously operated to keep the value of the first pressure gauge 501 constant to the initial pressure P1Observe the real-time flow rate Q of the first flow meter 11011'; if the real-time flow rate Q of the first flow meter 11011The value of' being at the initial flow rate Q1Within the range of 80-120% of the value, the first rotary valve 201 is in a normal operation state, and observation is continued; if the real-time flow rate Q of the first flow meter 11011' the value exceeds the initial flow rate Q1The range of 80-120% of the value, it is determined that the first rotary valve 201 is leaking.
Example 23
Example 19 was repeated except for step 8): the first rotary valve 201 is continuously operated to keep the fan motor frequency of the first dust removing system 401 from changing to the initial frequency F1Observe the real-time pressure P of the first pressure gauge 5011'; if the real-time pressure P of the first pressure gauge 5011At an initial pressure P1Within the range of 80-120% of the value, the first rotary valve 201 is in a normal operation state, and observation is continued; if the real-time pressure P of the first pressure gauge 5011' the value exceeds the initial pressure P1The range of 80-120% of the value, it is determined that the first rotary valve 201 is leaking.
Example 24
Example 20 was repeated except that step 8) was: the first rotary valve 201 is continuously operated to keep the flow rate of the first flow meter 1101 from becoming the initial flow rate Q1Observe the real-time pressure P of the first pressure gauge 5011'; if the real-time pressure P of the first pressure gauge 5011At an initial pressure P1Within the range of 80-120%, the first rotary valve 201 is in a normal operation state, and the observation is continued(ii) a If the real-time pressure P of the first pressure gauge 5011' the value exceeds the initial pressure P1The range of 80-120% of the value, it is determined that the first rotary valve 201 is leaking.
Example 25
Example 17 was repeated except that the method further included:
9) a first pipeline L1 is additionally arranged between the bottom of the adsorption tower 1 and the first rotary valve 201, and the flue gas at the upper part of the first rotary valve 201 is mixed with the gas conveyed by the first external gas conveying pipeline L2 through a first pipeline L1 and then conveyed to an original flue gas conveying pipeline L0;
10) the first valve 601 provided on the first pipe L1 is adjusted so that the real-time frequency F of the fan motor of the first dust removing system 4011' restore to equal the initial frequency F,1。
Example 26
Example 18 is repeated except that the method further comprises:
9) a first pipeline L1 is additionally arranged between the bottom of the adsorption tower 1 and the first rotary valve 201, and the flue gas at the upper part of the first rotary valve 201 is mixed with the gas conveyed by the first external gas conveying pipeline L2 through a first pipeline L1 and then conveyed to an original flue gas conveying pipeline L0;
10) adjusting a first valve 601 provided on the first line L1, or causing a real-time flow Q of the first flow meter 11011Is equal to the initial flow Q1。
Example 27
Example 19 or 20 was repeated except that the method further included:
9) a first pipeline L1 is additionally arranged between the bottom of the adsorption tower 1 and the first rotary valve 201, and the flue gas at the upper part of the first rotary valve 201 is mixed with the gas conveyed by the first external gas conveying pipeline L2 through a first pipeline L1 and then conveyed to an original flue gas conveying pipeline L0;
10) the first valve 601 provided on the first pipe L1 is adjusted so that the real-time pressure P of the first pressure gauge 5011' Return to equal initial pressure P1。
Example 26
Example 21 is repeated except that the method further comprises:
9) a first pipeline L1 is additionally arranged between the bottom of the adsorption tower 1 and the first rotary valve 201, and the flue gas at the upper part of the first rotary valve 201 is mixed with the gas conveyed by the first external gas conveying pipeline L2 through a first pipeline L1 and then conveyed to an original flue gas conveying pipeline L0;
10) the first valve 601 provided on the first pipe L1 is adjusted so that the real-time frequency F of the fan motor of the first dust removing system 4011' the value restores the initial frequency F1The value is in the range of 80-120%.
Example 27
Example 22 is repeated, except that the method further comprises:
9) a first pipeline L1 is additionally arranged between the bottom of the adsorption tower 1 and the first rotary valve 201, and the flue gas at the upper part of the first rotary valve 201 is mixed with the gas conveyed by the first external gas conveying pipeline L2 through a first pipeline L1 and then conveyed to an original flue gas conveying pipeline L0;
10) the first valve 601 provided on the first pipe L1 is adjusted so that the real-time flow rate Q of the first flow meter 11011' the value restores the initial flow Q1The value is in the range of 80-120%.
Example 28
Example 23 or 24 was repeated except that the method further included:
9) a first pipeline L1 is additionally arranged between the bottom of the adsorption tower 1 and the first rotary valve 201, and the flue gas at the upper part of the first rotary valve 201 is mixed with the gas conveyed by the first external gas conveying pipeline L2 through a first pipeline L1 and then conveyed to an original flue gas conveying pipeline L0;
10) the first valve 601 provided on the first pipe L1 is adjusted so that the real-time pressure P of the first pressure gauge 5011' value restores the initial pressure P1The value is in the range of 80-120%.
Example 29
Example 21 is repeated except that the method further comprises:
11a) the other end of the first external gas conveying pipeline L2 is connected to the cooling section gas outlet 701 of the desorption tower 7, and the third valve 801 provided on the first external gas conveying pipeline L2 is adjusted so that the temperature of the mixed gas of the flue gas conveyed by the first pipeline L1 and the gas conveyed by the first external gas conveying pipeline L2 is higher than the acid dew point of the flue gas conveyed by the first pipeline L1.
The flue gas conveyed by the first pipeline L1 and the gas conveyed by the first external gas conveying pipeline L2 are mixed and then conveyed to the original flue gas conveying pipeline L0 through a second pipeline L3, and a first thermometer 901 is arranged on the second pipeline L3; the first thermometer 901 detects the temperature of the mixed gas in the pipe at the corresponding position on-line.
In step 11a), the third valve 801 disposed on the first external gas conveying pipeline L2 is adjusted so that the temperature of the mixed gas obtained by mixing the flue gas conveyed by the first pipeline L1 and the gas conveyed by the first external gas conveying pipeline L2 is higher than the acid dew point of the flue gas conveyed by the first pipeline L1, specifically:
calculating the concentration of sulfur trioxide in the flue gas conveyed by the first pipeline L1: the concentration of sulfur dioxide in the flue gas conveyed by the first pipeline L1 is measured to be
Figure GDA0003029903750000341
Is 0.005%, and therefore the concentration of sulfur trioxide in the flue gas delivered by the first pipeline L1
Figure GDA0003029903750000342
Comprises the following steps:
Figure GDA0003029903750000343
in the formula (1), k is a constant and k is 1.2%;
calculating the acid dew point of the flue gas conveyed by the first pipeline L1: the concentration of water vapor in the flue gas conveyed by the first pipeline L1 was measured to be
Figure GDA0003029903750000344
9%, the acid dew point t of the flue gas conveyed by the first duct L1 can thus be obtainedld1Comprises the following steps:
Figure GDA0003029903750000345
in the formula (2), the reaction mixture is,
Figure GDA0003029903750000346
is the concentration,%, of water vapor in the flue gas conveyed by the first conduit L1;
Figure GDA0003029903750000347
is the concentration,%, of sulfur trioxide in the flue gas delivered by the first pipeline L1;
the third valve 801 on the first external gas delivery line L2 was adjusted so that the first thermometer 901 on the second line L3 read 105 ℃.
Example 30
Example 23 was repeated except that the method further included:
11b) adjusting a third valve 801 disposed on first foreign gas delivery line L2 such that the acid dew point of the mixed gas of flue gas delivered by first line L1 and gas delivered by first foreign gas delivery line L2 is below ambient temperature;
preferably, the flue gas conveyed by the first pipeline L1 and the gas conveyed by the first external gas conveying pipeline L2 are mixed and then conveyed to the raw flue gas conveying pipeline L0 through the second pipeline L3, and the first CO (or CO) is arranged on the second pipeline L32) A detector 1001; first CO detector 1001 detects CO (or CO) in mixed gas in pipeline at corresponding position on line2) The concentration of (c).
In step 11b), the third valve 801 disposed on the first external gas conveying pipeline L2 is adjusted so that the acid dew point of the mixed gas obtained by mixing the flue gas conveyed by the first pipeline L1 and the gas conveyed by the first external gas conveying pipeline L2 is lower than the ambient temperature, specifically:
calculating the concentration of sulfur trioxide in the flue gas conveyed by the first pipeline L1: the concentration of sulfur dioxide in the flue gas conveyed by the first pipeline L1 is measured to be
Figure GDA0003029903750000351
0.005%, whereby the flue gas conveyed by the first duct L1Concentration of sulfur trioxide
Figure GDA0003029903750000352
Comprises the following steps:
Figure GDA0003029903750000353
in the formula (1), k is a constant and k is 1%;
calculating the acid dew point of the mixed gas obtained by mixing the flue gas conveyed by the first pipeline L1 and the gas conveyed by the first external gas conveying pipeline L2: the concentration of water vapor in the flue gas conveyed by the first pipeline L1 was measured to be
Figure GDA0003029903750000354
At 8%, the dilution ratio of the gas delivered by the first external gas delivery pipeline L2 to the flue gas delivered by the first pipeline L1 is n1, so that the acid dew point t of the mixed gas isld1' is:
Figure GDA0003029903750000355
in the formula (5), the reaction mixture is,
Figure GDA0003029903750000356
is the concentration of water vapor in the mixed gas,%;
Figure GDA0003029903750000357
is the concentration of sulfur trioxide in the mixed gas,%;
thirdly, according to the measured ambient temperature tEnvironment(s)At 25 ℃, the acid dew point of the mixed gas obtained by mixing the flue gas conveyed by the first pipeline L1 and the gas conveyed by the first external gas conveying pipeline L2 is lower than the ambient temperature, so that:
tld1'＜tenvironment(s)；………(6)；
According to the formula (6), the dilution multiple n1 of the gas conveyed by the first external gas conveying pipeline L2 to the flue gas conveyed by the first pipeline L1 is 34;
fourthly, calculating the concentration of CO in the mixed gas obtained by mixing the flue gas conveyed by the first pipeline L1 and the gas conveyed by the first external gas conveying pipeline L2:
the CO concentration in the flue gas conveyed by the first pipeline L1 is measured to be CCO10.45%, whereby the concentration C of CO in the mixed gas in the second line L3CO1' is:
CCO1’＝CCO1/n1；………(7)；
third valve 801 on first foreign gas delivery line L2 was adjusted so that first CO detector 1001 on second line L3 reads 1320 ppm.
Example 31
A system for judging and treating gas leakage of a rotary valve comprises an adsorption tower 1, an analytical tower 7, a second rotary valve 202, a second conveyor 302, a second dust removal system 402, a second pressure gauge 502, an original flue gas conveying pipeline L0 and a sixth pipeline L9; wherein, the raw flue gas conveying pipeline L0 is connected to the flue gas inlet of the adsorption tower 1; the second conveyor 302 is connected with the activated carbon outlet of the desorption tower 7 and the activated carbon inlet of the adsorption tower 1; a second rotary valve 202 is arranged at an active carbon inlet of the adsorption tower 1; the second dust removal system 402 is connected to the second conveyor 302 through a sixth conduit L9; a second pressure gauge 502 is provided on the second conveyor 302.
Example 32
Embodiment 31 is repeated except that the sixth conduit L9 is provided with a second flow meter 1102.
Example 33
Example 32 was repeated except that a feed line L10 was provided between the activated carbon inlet of adsorption column 1 and second conveyor 302; the second rotary valve 202 is provided on the feed line L10; a fourth line L6, which leads from the feed line L10 downstream of the second rotary valve 202, is combined with a second foreign gas transfer line L7 and connected via a fifth line L8 to the raw flue gas transfer line L0. The second valve 602 is provided in the fourth line L6. The second incoming gas line L7 is provided with a fourth valve 802.
Example 34
Example 33 was repeated except that the fifth pipeline L8 was provided with a second detecting means; the second detection means is a second thermometer 902.
Example 35
Example 33 was repeated except that the fifth pipeline L8 was provided with a second detecting means; the second detection device is a second CO detector 1002.
Example 36
Example 34 was repeated except that a second on-line flue gas analyzer 1202 was provided on feed line L10. The other end of the second external gas transport pipe L7 is connected to the cooling stage gas outlet 701 of the desorption tower 7.
Example 37
Example 31 was repeated except that the system further included a first rotary valve 201, a first conveyor 301, a first dedusting system 401, a first pressure gauge 501, a third conduit L4; wherein, the first conveyor 301 is connected with the activated carbon outlet of the adsorption tower 1 and the activated carbon inlet of the desorption tower 7; a first rotary valve 201 is arranged at an active carbon outlet of the adsorption tower 1; the first dust removal system 401 is connected to the first conveyor 301 through a third pipe L4; the first conveyor 301 is provided with a first pressure gauge 501.
Example 38
Embodiment 37 is repeated except that the third pipe L4 is provided with the first flow meter 1101.
Example 39
Example 38 was repeated except that a blanking line L5 was provided between the activated carbon outlet of the adsorption tower 1 and the first conveyor 301; the first rotary valve 201 is arranged on the blanking pipeline L5; a first pipeline L1 and a first external gas conveying pipeline L2 which are led out from the blanking pipeline L5 and are positioned at the upstream of the first rotary valve 201 are combined and then are connected to the raw flue gas conveying pipeline L0 through a second pipeline L3; the first pipe L1 is provided with a first valve 601.
Example 40
Embodiment 39 is repeated except that third valve 801 is provided on first foreign gas delivery pipe L2. A first detection device is arranged on the second pipeline L3; the first detection device is a first thermometer 901
EXAMPLE 41
Embodiment 39 is repeated except that third valve 801 is provided on first foreign gas delivery pipe L2. A first detection device is arranged on the second pipeline L3; the first detection device is a first CO detector 1001.
Example 42
Example 40 was repeated except that the first on-line flue gas analyzer 1201 was provided on the feeding line L5. The other end of the first external gas conveying pipe L2 is connected to the cooling stage gas outlet 701 of the desorption tower 7.

Claims (35)

1. A method of treating rotary valve blow-by, the method further comprising the steps of:
1) the flue gas enters the adsorption tower (1) through a raw flue gas conveying pipeline (L0), and is adsorbed and purified by activated carbon in the adsorption tower (1) and then discharged; the activated carbon adsorbing the pollutants in the flue gas enters a first conveyor (301) through a first rotary valve (201) at the bottom of the adsorption tower (1), and the first conveyor (301) conveys the activated carbon to a desorption tower (7) for desorption and regeneration; the active carbon resolved by the resolving tower (7) enters a second conveyor (302) and enters the adsorption tower (1) through a second rotary valve (202) at the top of the adsorption tower (1);
2) recording the initial frequency F of the fan motor of the second dust removal system (402) connected to the second conveyor (302) at the beginning of the commissioning of the second rotary valve (202)2Or recording the initial flow Q of the second flowmeter (1102) on the conveying pipeline connecting the second conveyor (302) and the second dust removal system (402)2And recording an initial pressure P of a second pressure gauge (502) arranged on the second conveyor (302) and upstream of the second rotary valve (202)2；
3) The second rotary valve (202) is continuously operated, and the value of the second pressure gauge (502) is kept unchanged to the initial pressure P2Observing the real-time frequency F of the fan motor of the second dust removal system (402)2' or observe the real-time flow Q of the second flowmeter (1102)2'; if the real-time frequency F of the fan motor of the second dust removal system (402)2Is equal to the initial frequency F2Or the real-time flow rate Q of the second flowmeter (1102)2Is equal to the initial flow rate Q2If so, the second rotary valve (202) is in a normal running state and continues to observe; if the fan motor of the second dust removal system (402) is realTime frequency F2' not equal to the initial frequency F2Or the real-time flow rate Q of the second flowmeter (1102)2' not equal to initial flow Q2If so, judging that the second rotary valve (202) leaks air;
or keeping the frequency of the fan motor of the second dust removal system (402) unchanged from the initial frequency F2Or the flow rate of the second flowmeter (1102) is kept unchanged from the initial flow rate Q2Observing the real-time pressure P of the second pressure gauge (502)2'; if the real-time pressure P of the second pressure gauge (502) is higher than the real-time pressure P2Is equal to the initial pressure P2If so, the second rotary valve (202) is in a normal running state and continues to observe; if the real-time pressure P of the second pressure gauge (502) is higher than the real-time pressure P2' not equal to the initial pressure P2If so, judging that the second rotary valve (202) leaks air;
4) a fourth pipeline (L6) is additionally arranged between the top of the adsorption tower (1) and the second rotary valve (202), and the flue gas at the lower part of the second rotary valve (202) is mixed with the gas conveyed by the second external gas conveying pipeline (L7) through the fourth pipeline (L6) and then is conveyed to the original flue gas conveying pipeline (L0);
5) adjusting a second valve (602) disposed on the fourth conduit (L6) such that a real-time frequency F of a fan motor of the second dust pelletizing system (402) is2' restore to equal the initial frequency F2Or the real-time flow Q of the second flowmeter (1102)2' restore to equal initial flow Q2(ii) a Alternatively, the second valve (602) provided on the fourth pipe (L6) is adjusted so that the real-time pressure P of the second pressure gauge (502) is2' Return to equal initial pressure P2；
6a) The other end of the second external gas conveying pipeline (L7) is connected with a gas outlet (701) of a cooling section of the desorption tower (7), and a fourth valve (802) arranged on the second external gas conveying pipeline (L7) is adjusted, so that the temperature of mixed gas obtained by mixing the flue gas conveyed by the fourth pipeline (L6) and the gas conveyed by the second external gas conveying pipeline (L7) is higher than the acid dew point of the flue gas conveyed by the fourth pipeline (L6);
in the step 6a), the fourth valve (802) arranged on the second external gas conveying pipeline (L7) is adjusted, so that the temperature of the mixed gas obtained by mixing the flue gas conveyed by the fourth pipeline (L6) and the gas conveyed by the second external gas conveying pipeline (L7) is higher than the acid dew point of the flue gas conveyed by the fourth pipeline (L6), specifically:
calculating the concentration of sulfur trioxide in the flue gas conveyed by a fourth pipeline (L6): measuring the concentration of sulfur dioxide in the flue gas conveyed by the fourth pipeline (L6) to be
Figure FDA0003045021880000021
The concentration of sulfur trioxide in the flue gas conveyed by the fourth pipeline (L6)
Figure FDA0003045021880000022
Comprises the following steps:
Figure FDA0003045021880000023
in the formula (3), k is a constant and is 0.1-5%;
calculating the acid dew point of the flue gas conveyed by the fourth pipeline (L6): the concentration of water vapor in the flue gas conveyed by the fourth pipeline (L6) is measured to be
Figure FDA0003045021880000024
Thus, the acid dew point t of the flue gas conveyed by the fourth pipeline (L6) can be obtainedld2Comprises the following steps:
Figure FDA0003045021880000025
in the formula (4), the reaction mixture is,
Figure FDA0003045021880000026
concentration,%, of water vapour in the flue gas conveyed by the fourth conduit (L6);
Figure FDA0003045021880000027
is the concentration,%, of sulfur trioxide in the flue gas conveyed by the fourth conduit (L6);
regulatingA fourth valve (802) on the second external gas delivery line (L7) so that the reading t of the second thermometer (902) on the fifth line (L8)2＞tld2。
2. The method of claim 1, wherein: the step 3) is as follows: the second rotary valve (202) is continuously operated, and the value of the second pressure gauge (502) is kept unchanged to the initial pressure P2Observing the real-time frequency F of the fan motor of the second dust removal system (402)2' or observe the real-time flow Q of the second flowmeter (1102)2'; if the real-time frequency F of the fan motor of the second dust removal system (402)2The value of' being at an initial frequency F2A value in the range of 80-120% or a real-time flow Q of the second flow meter (1102)2The value of' being at the initial flow rate Q2Within the range of 80-120% of the value, the second rotary valve (202) is in a normal operation state, and the observation is continued; if the real-time frequency F of the fan motor of the second dust removal system (402)2The value of' exceeds the initial frequency F2Range of 80-120% of the value or real-time flow Q of the second flow meter (1102)2' the value exceeds the initial flow rate Q2Determining that the second rotary valve (202) is leaking air if the value is within the range of 80-120%;
or keeping the frequency of the fan motor of the second dust removal system (402) unchanged from the initial frequency F2Or the flow rate of the second flowmeter (1102) is kept unchanged from the initial flow rate Q2Observing the real-time pressure P of the second pressure gauge (502)2'; if the real-time pressure P of the second pressure gauge (502) is higher than the real-time pressure P2At an initial pressure P2Within the range of 80-120% of the value, the second rotary valve (202) is in a normal operation state, and the observation is continued; if the real-time pressure P of the second pressure gauge (502) is higher than the real-time pressure P2' the value exceeds the initial pressure P2Determining that the second rotary valve (202) is leaking air if the value is within the range of 80-120%;
5) adjusting a second valve (602) disposed on the fourth conduit (L6) such that a real-time frequency F of a fan motor of the second dust pelletizing system (402) is2The value of' is restored to be at the initial frequency F2A range of values 80-120 or a second flow meter (1102)Time flow rate Q2' the value is restored to the value at the initial flow rate Q2A range of values from 80 to 120; alternatively, the second valve (602) provided on the fourth pipe (L6) is adjusted so that the real-time pressure P of the second pressure gauge (502) is2' the value is restored to the initial pressure P2A range of values from 80 to 120;
k is 0.3-4%.
3. The method of claim 1, wherein: the step 3) is as follows: the second rotary valve (202) is continuously operated, and the value of the second pressure gauge (502) is kept unchanged to the initial pressure P2Observing the real-time frequency F of the fan motor of the second dust removal system (402)2' or observe the real-time flow Q of the second flowmeter (1102)2'; if the real-time frequency F of the fan motor of the second dust removal system (402)2The value of' being at an initial frequency F2A value in the range of 85-115% or the real-time flow Q of the second flow meter (1102)2The value of' being at the initial flow rate Q2The value is within the range of 85-115%, the second rotary valve (202) is in a normal operation state, and the observation is continued; if the real-time frequency F of the fan motor of the second dust removal system (402)2The value of' exceeds the initial frequency F2Range of 85-115% of the value or real-time flow Q of the second flow meter (1102)2' the value exceeds the initial flow rate Q2A range of 85-115% of the value, determining that the second rotary valve (202) is leaking;
or keeping the frequency of the fan motor of the second dust removal system (402) unchanged from the initial frequency F2Or the flow rate of the second flowmeter (1102) is kept unchanged from the initial flow rate Q2Observing the real-time pressure P of the second pressure gauge (502)2'; if the real-time pressure P of the second pressure gauge (502) is higher than the real-time pressure P2At an initial pressure P2The value is within the range of 85-115%, the second rotary valve (202) is in a normal operation state, and the observation is continued; if the real-time pressure P of the second pressure gauge (502) is higher than the real-time pressure P2' the value exceeds the initial pressure P2A range of 85-115% of the value, determining that the second rotary valve (202) is leaking;
5) regulating a second valve arranged on a fourth line (L6)(602) Enabling real-time frequency F of a fan motor of a second dust removal system (402)2The value of' is restored to be at the initial frequency F2A range of values from 85 to 115 or real-time flow Q of the second flow meter (1102)2' the value is restored to the value at the initial flow rate Q2A range of values from 85 to 115; alternatively, the second valve (602) provided on the fourth pipe (L6) is adjusted so that the real-time pressure P of the second pressure gauge (502) is2' the value is restored to the initial pressure P2A range of values from 85 to 115;
k is 0.5-3%.
4. The method of claim 1, wherein: the step 3) is as follows: the second rotary valve (202) is continuously operated, and the value of the second pressure gauge (502) is kept unchanged to the initial pressure P2Observing the real-time frequency F of the fan motor of the second dust removal system (402)2' or observe the real-time flow Q of the second flowmeter (1102)2'; if the real-time frequency F of the fan motor of the second dust removal system (402)2The value of' being at an initial frequency F2A range of values of 90-110% or a real-time flow Q of the second flow meter (1102)2The value of' being at the initial flow rate Q2Within the range of 90-110% of the value, the second rotary valve (202) is in a normal operation state, and the observation is continued; if the real-time frequency F of the fan motor of the second dust removal system (402)2The value of' exceeds the initial frequency F2Range of 90-110% of value or real-time flow Q of the second flow meter (1102)2' the value exceeds the initial flow rate Q2Determining that the second rotary valve (202) is leaking air if the value is in the range of 90-110%;
or keeping the frequency of the fan motor of the second dust removal system (402) unchanged from the initial frequency F2Or the flow rate of the second flowmeter (1102) is kept unchanged from the initial flow rate Q2Observing the real-time pressure P of the second pressure gauge (502)2'; if the real-time pressure P of the second pressure gauge (502) is higher than the real-time pressure P2At an initial pressure P2Within the range of 90-110% of the value, the second rotary valve (202) is in a normal operation state, and the observation is continued; if the real-time pressure P of the second pressure gauge (502) is higher than the real-time pressure P2' ofValue exceeding initial pressure P2Determining that the second rotary valve (202) is leaking air if the value is in the range of 90-110%;
5) adjusting a second valve (602) disposed on the fourth conduit (L6) such that a real-time frequency F of a fan motor of the second dust pelletizing system (402) is2The value of' is restored to be at the initial frequency F2A range of values of 90-110 or real-time flow Q of the second flow meter (1102)2' the value is restored to the value at the initial flow rate Q2A value in the range of 90-110; alternatively, the second valve (602) provided on the fourth pipe (L6) is adjusted so that the real-time pressure P of the second pressure gauge (502) is2' the value is restored to the initial pressure P2A value in the range of 90-110.
5. The method according to any one of claims 1-4, wherein: the flue gas conveyed by the fourth pipeline (L6) and the gas conveyed by the second external gas conveying pipeline (L7) are mixed and then conveyed to the original flue gas conveying pipeline (L0) through a fifth pipeline (L8), and a second thermometer (902) is arranged on the fifth pipeline (L8); the second thermometer (902) detects the temperature of the mixed gas in the pipe at the corresponding position on line.
6. The method of claim 5, wherein: the method further comprises the following steps:
6b) and adjusting a fourth valve (802) arranged on the second external gas conveying pipeline (L7) to enable the acid dew point of mixed gas obtained by mixing the flue gas conveyed by the fourth pipeline (L6) and the gas conveyed by the second external gas conveying pipeline (L7) to be lower than the ambient temperature.
7. The method of claim 6, wherein: the flue gas conveyed by the fourth pipeline (L6) and the gas conveyed by the second external gas conveying pipeline (L7) are mixed and then conveyed to the original flue gas conveying pipeline (L0) through a fifth pipeline (L8), and a second CO detector (1002) is arranged on the fifth pipeline (L8); and a second CO detector (1002) detects the concentration of CO in the mixed gas in the pipeline at the corresponding position on line.
8. The method according to claim 6 or 7, characterized in that: in the step 6b), the fourth valve (802) arranged on the second external gas conveying pipeline (L7) is adjusted, so that the acid dew point of the mixed gas obtained by mixing the flue gas conveyed by the fourth pipeline (L6) and the gas conveyed by the second external gas conveying pipeline (L7) is lower than the ambient temperature, specifically:
calculating the concentration of sulfur trioxide in the flue gas conveyed by a fourth pipeline (L6): measuring the concentration of sulfur dioxide in the flue gas conveyed by the fourth pipeline (L6) to be
Figure FDA0003045021880000051
The concentration of sulfur trioxide in the flue gas conveyed by the fourth pipeline (L6)
Figure FDA0003045021880000052
Comprises the following steps:
Figure FDA0003045021880000053
calculating the acid dew point of the mixed gas obtained by mixing the flue gas conveyed by the fourth pipeline (L6) and the gas conveyed by the second external gas conveying pipeline (L7): the concentration of water vapor in the flue gas conveyed by the fourth pipeline (L6) is measured to be
Figure FDA0003045021880000054
The dilution factor of the gas conveyed by the second external gas conveying pipeline (L7) to the flue gas conveyed by the fourth pipeline (L6) is set to be n2, so that the acid dew point t of the mixed gasld2' is:
Figure FDA0003045021880000055
in the formula (8), the reaction mixture is,
Figure FDA0003045021880000056
is the concentration of water vapor in the mixed gas,%;
Figure FDA0003045021880000057
is the concentration of sulfur trioxide in the mixed gas,%;
thirdly, according to the measured ambient temperature tEnvironment(s)The acid dew point of the mixed gas obtained by mixing the flue gas conveyed by the fourth pipeline (L6) and the gas conveyed by the second external gas conveying pipeline (L7) is lower than the ambient temperature, so that the following results are obtained:
tld2'＜tenvironment(s)；………(9)；
The dilution factor n2 of the gas conveyed by the second external gas conveying pipeline (L7) to the flue gas conveyed by the fourth pipeline (L6) can be obtained according to the formula (9);
fourthly, calculating the concentration of CO in the mixed gas obtained by mixing the flue gas conveyed by the fourth pipeline (L6) and the gas conveyed by the second external gas conveying pipeline (L7):
measuring the CO concentration in the flue gas conveyed by the fourth pipeline (L6) to be CCO2Whereby the concentration C of CO in the mixed gas in the fifth pipeline (L8)CO2' is:
CCO2’＝CCO2/n2；………(10)；
adjusting a fourth valve (802) on a second incoming gas delivery line (L7) such that a second CO detector (1002) on a fifth line (L8) reads CCO2’。
9. The method of any one of claims 1-4, 6-7, wherein: the method further comprises the following steps:
7) recording the initial frequency F of the fan motor of the first dust-removal system (401) connected to the first conveyor (301) at the beginning of the commissioning of the first rotary valve (201)1Or recording the initial flow rate Q of a first flow meter (1101) on a conveying pipeline connecting the first conveyor (301) and the first dust removal system (401)1And recording the initial pressure P of a first pressure gauge (501) arranged on the first conveyor (301) and downstream of the first rotary valve (201)1；
8) The first rotary valve (201) is continuously operated to maintain the first pressureThe value of the meter (501) does not change to the initial pressure P1Observing the real-time frequency F of the fan motor of the first dust removal system (401)1' or observe a real-time flow Q of the first flow meter (1101)1'; if the real-time frequency F of the fan motor of the first dust removal system (401)1Is equal to the initial frequency F1Or the real-time flow rate Q of the first flow meter (1101)1Is equal to the initial flow rate Q1If so, the first rotary valve (201) is in a normal running state and continues to observe; if the real-time frequency F of the fan motor of the first dust removal system (401)1' not equal to the initial frequency F1Or the real-time flow rate Q of the first flow meter (1101)1' not equal to initial flow Q1Judging that the first rotary valve (201) leaks air;
or the fan motor frequency of the first dust removal system (401) is kept not to be changed to the initial frequency F1Or the flow rate of the first flow meter (1101) is kept unchanged from the initial flow rate Q1Observing the real-time pressure P of the first pressure gauge (501)1'; if the real-time pressure P of the first pressure gauge (501)1Is equal to the initial pressure P1If so, the first rotary valve (201) is in a normal running state and continues to observe; if the real-time pressure P of the first pressure gauge (501)1' not equal to the initial pressure P1If so, the first rotary valve (201) is judged to be leaking.
10. The method of claim 9, wherein: step 8) is as follows: the first rotary valve (201) is continuously operated, and the value of the first pressure gauge (501) is kept unchanged to the initial pressure P1Observing the real-time frequency F of the fan motor of the first dust removal system (401)1' or observe a real-time flow Q of the first flow meter (1101)1'; if the real-time frequency F of the fan motor of the first dust removal system (401)1The value of' being at an initial frequency F1A real-time flow rate Q of the first flow meter (1101) or in a range of 80-120% of the value1The value of' being at the initial flow rate Q1The value is within the range of 80-120%, the first rotary valve (201) is in a normal operation state, and the observation is continued; if the real-time frequency F of the fan motor of the first dust removal system (401)1' ofValue exceeding the initial frequency F1Range of 80-120% of the value or real-time flow rate Q of the first flow meter (1101)1' the value exceeds the initial flow rate Q1Determining that the first rotary valve (201) is leaking air if the value is within the range of 80-120%;
or the fan motor frequency of the first dust removal system (401) is kept not to be changed to the initial frequency F1Or the flow rate of the first flow meter (1101) is kept unchanged from the initial flow rate Q1Observing the real-time pressure P of the first pressure gauge (501)1'; if the real-time pressure P of the first pressure gauge (501)1At an initial pressure P1The value is within the range of 80-120%, the first rotary valve (201) is in a normal operation state, and the observation is continued; if the real-time pressure P of the first pressure gauge (501)1' the value exceeds the initial pressure P1And the range of 80-120% of the value, judging that the first rotary valve (201) leaks air.
11. The method of claim 9, wherein: step 8) is as follows: the first rotary valve (201) is continuously operated, and the value of the first pressure gauge (501) is kept unchanged to the initial pressure P1Observing the real-time frequency F of the fan motor of the first dust removal system (401)1' or observe a real-time flow Q of the first flow meter (1101)1'; if the real-time frequency F of the fan motor of the first dust removal system (401)1The value of' being at an initial frequency F1A range of 85-115% of the value or a real-time flow Q of the first flow meter (1101)1The value of' being at the initial flow rate Q1The value is within the range of 85-115%, the first rotary valve (201) is in a normal operation state, and the observation is continued; if the real-time frequency F of the fan motor of the first dust removal system (401)1The value of' exceeds the initial frequency F1Range of 85-115% of the value or real-time flow Q of the first flow meter (1101)1' the value exceeds the initial flow rate Q1The range of 85-115% of the value, then the first rotary valve (201) is judged to be air leakage;
or the fan motor frequency of the first dust removal system (401) is kept not to be changed to the initial frequency F1Or the flow rate of the first flow meter (1101) is kept unchanged from the initial flow rate Q1Observing the real-time pressure P of the first pressure gauge (501)1'; if the real-time pressure P of the first pressure gauge (501)1At an initial pressure P1The value is within the range of 85-115%, the first rotary valve (201) is in a normal operation state, and the observation is continued; if the real-time pressure P of the first pressure gauge (501)1' the value exceeds the initial pressure P1And the range of 85-115% of the value, judging that the first rotary valve (201) leaks air.
12. The method of claim 9, wherein: step 8) is as follows: the first rotary valve (201) is continuously operated, and the value of the first pressure gauge (501) is kept unchanged to the initial pressure P1Observing the real-time frequency F of the fan motor of the first dust removal system (401)1' or observe a real-time flow Q of the first flow meter (1101)1'; if the real-time frequency F of the fan motor of the first dust removal system (401)1The value of' being at an initial frequency F1A range of 90-110% of the value or a real-time flow Q of the first flow meter (1101)1The value of' being at the initial flow rate Q1The value is in the range of 90-110%, the first rotary valve (201) is in a normal operation state, and the observation is continued; if the real-time frequency F of the fan motor of the first dust removal system (401)1The value of' exceeds the initial frequency F1Range of 90-110% of the value or real-time flow Q of the first flow meter (1101)1' the value exceeds the initial flow rate Q1Determining that the first rotary valve (201) is leaking if the value is in the range of 90-110%;
or the fan motor frequency of the first dust removal system (401) is kept not to be changed to the initial frequency F1Or the flow rate of the first flow meter (1101) is kept unchanged from the initial flow rate Q1Observing the real-time pressure P of the first pressure gauge (501)1'; if the real-time pressure P of the first pressure gauge (501)1At an initial pressure P1The value is in the range of 90-110%, the first rotary valve (201) is in a normal operation state, and the observation is continued; if the real-time pressure P of the first pressure gauge (501)1' the value exceeds the initial pressure P1And the range of 90-110% of the value, judging that the first rotary valve (201) leaks air.
13. The method of claim 9, wherein: the method further comprises the following steps:
9) a first pipeline (L1) is additionally arranged between the bottom of the adsorption tower (1) and the first rotary valve (201), and the flue gas at the upper part of the first rotary valve (201) is mixed with the gas conveyed by the first external gas conveying pipeline (L2) through the first pipeline (L1) and then is conveyed to the original flue gas conveying pipeline (L0);
10) adjusting a first valve (601) arranged on the first pipe (L1) such that a real-time frequency F of a fan motor of the first dust removal system (401) is1' restore to equal the initial frequency F1Or the real-time flow Q of the first flow meter (1101)1' restore to equal initial flow Q1(ii) a Alternatively, the first valve (601) provided on the first pipe (L1) is adjusted so that the real-time pressure P of the first pressure gauge (501) is1' Return to equal initial pressure P1。
14. The method of claim 13, wherein: step 10), adjusting a first valve (601) arranged on a first pipeline (L1) to enable the real-time frequency F of a fan motor of the first dust removal system (401)1' the value restores the initial frequency F1In the range of 80-120% of the value or such that the real-time flow rate Q of the first flow meter (1101) is1' the value restores the initial flow Q1In the range of 80-120% of the value; alternatively, the first valve (601) provided on the first pipe (L1) is adjusted so that the real-time pressure P of the first pressure gauge (501) is1' value restores the initial pressure P1The value is in the range of 80-120%.
15. The method according to claim 13 or 14, characterized in that: the method further comprises the following steps:
11a) the other end of the first external gas conveying pipeline (L2) is connected with a cooling section gas outlet (701) of the desorption tower (7), and a third valve (801) arranged on the first external gas conveying pipeline (L2) is adjusted, so that the temperature of mixed gas formed by mixing the flue gas conveyed by the first pipeline (L1) and the gas conveyed by the first external gas conveying pipeline (L2) is higher than the acid dew point of the flue gas conveyed by the first pipeline (L1).
16. The method of claim 15, wherein: the flue gas conveyed by the first pipeline (L1) and the gas conveyed by the first external gas conveying pipeline (L2) are mixed and then conveyed to the original flue gas conveying pipeline (L0) through the second pipeline (L3), and the second pipeline (L3) is provided with a first thermometer (901); a first thermometer (901) detects the temperature of the mixed gas in the pipe at a corresponding position on-line.
17. The method of claim 16, wherein: in the step 11a), the third valve (801) arranged on the first external gas conveying pipeline (L2) is adjusted, so that the temperature of the mixed gas obtained by mixing the flue gas conveyed by the first pipeline (L1) and the gas conveyed by the first external gas conveying pipeline (L2) is higher than the acid dew point of the flue gas conveyed by the first pipeline (L1), specifically:
calculating the concentration of sulfur trioxide in the flue gas conveyed by the first pipeline (L1): measuring the concentration of sulfur dioxide in the flue gas conveyed by the first pipeline (L1) to be
Figure FDA0003045021880000081
Thus, the concentration of sulfur trioxide in the flue gas conveyed by the first pipeline (L1)
Figure FDA0003045021880000082
Comprises the following steps:
Figure FDA0003045021880000083
calculating the acid dew point of the flue gas conveyed by the first pipeline (L1): the concentration of water vapor in the flue gas conveyed by the first pipeline (L1) is measured to be
Figure FDA0003045021880000084
Thus, the smoke conveyed by the first pipeline (L1) can be obtainedAcid dew point t ofld1Comprises the following steps:
Figure FDA0003045021880000085
in the formula (2), the reaction mixture is,
Figure FDA0003045021880000086
is the concentration,%, of water vapour in the flue gas conveyed by the first conduit (L1);
Figure FDA0003045021880000087
is the concentration,%, of sulfur trioxide in the flue gas conveyed by the first conduit (L1);
adjusting a third valve (801) on the first external gas delivery line (L2) such that the reading t of the first thermometer (901) on the second line (L3)1＞tld1。
18. The method according to claim 13 or 14, characterized in that: the method further comprises the following steps:
11b) and adjusting a third valve (801) arranged on the first external gas conveying pipeline (L2) to enable the acid dew point of the mixed gas after the flue gas conveyed by the first pipeline (L1) is mixed with the gas conveyed by the first external gas conveying pipeline (L2) to be lower than the ambient temperature.
19. The method of claim 18, wherein: the flue gas conveyed by the first pipeline (L1) and the gas conveyed by the first external gas conveying pipeline (L2) are mixed and then conveyed to the original flue gas conveying pipeline (L0) through the second pipeline (L3), and the second pipeline (L3) is provided with a first CO detector (1001); a first CO detector (1001) detects the concentration of CO in the mixed gas in the pipeline at the corresponding position on line.
20. The method of claim 19, wherein: in the step 11b), the third valve (801) arranged on the first external gas conveying pipeline (L2) is adjusted, so that the acid dew point of the mixed gas obtained by mixing the flue gas conveyed by the first pipeline (L1) and the gas conveyed by the first external gas conveying pipeline (L2) is lower than the ambient temperature, specifically:
calculating the concentration of sulfur trioxide in the flue gas conveyed by the first pipeline (L1): measuring the concentration of sulfur dioxide in the flue gas conveyed by the first pipeline (L1) to be
Figure FDA0003045021880000091
Thus, the concentration of sulfur trioxide in the flue gas conveyed by the first pipeline (L1)
Figure FDA0003045021880000092
Comprises the following steps:
Figure FDA0003045021880000093
calculating the acid dew point of the mixed gas obtained by mixing the flue gas conveyed by the first pipeline (L1) and the gas conveyed by the first external gas conveying pipeline (L2): the concentration of water vapor in the flue gas conveyed by the first pipeline (L1) is measured to be
Figure FDA0003045021880000094
The dilution factor of the gas conveyed by the first external gas conveying pipeline (L2) to the flue gas conveyed by the first pipeline (L1) is set to be n1, so that the acid dew point t of the mixed gasld1' is:
Figure FDA0003045021880000095
in the formula (5), the reaction mixture is,
Figure FDA0003045021880000096
is the concentration of water vapor in the mixed gas,%;
Figure FDA0003045021880000097
is the concentration of sulfur trioxide in the mixed gas,%;
thirdly, according to the measured ambient temperature tEnvironment(s)When the acid dew point of the mixed gas obtained by mixing the flue gas conveyed by the first pipeline (L1) and the gas conveyed by the first external gas conveying pipeline (L2) is lower than the ambient temperature, the following results are obtained:
tld1'＜tenvironment(s)；………(6)；
Obtaining the dilution factor n1 of the gas conveyed by the first external gas conveying pipeline (L2) to the flue gas conveyed by the first pipeline (L1) according to the formula (6);
fourthly, calculating the concentration of CO in the mixed gas obtained by mixing the flue gas conveyed by the first pipeline (L1) and the gas conveyed by the first external gas conveying pipeline (L2):
measuring the CO concentration in the flue gas conveyed by the first pipeline (L1) to be CCO1Whereby the concentration C of CO in the mixed gas in the second line (L3)CO1' is:
CCO1’＝CCO1/n1；………(7)；
adjusting a third valve (801) on the first external gas delivery line (L2) such that the first CO detector (1001) on the second line (L3) reads CCO1’。
21. The method of any one of claims 1-4, 6-7, 10-14, 16-17, 19-20, wherein: the first dust removal system (401) is connected with the first conveyor (301) through a third pipeline (L4); a first flowmeter (1101) is arranged on the third pipeline (L4); a blanking pipeline (L5) is arranged between an activated carbon outlet of the adsorption tower (1) and the first conveyor (301), a first online smoke analyzer (1201) is arranged on the first pipeline (L1) or the blanking pipeline (L5), and the first online smoke analyzer (1201) detects and analyzes the concentration of sulfur dioxide in the flue gas in the pipeline or the pipeline at the position where the first online smoke analyzer (1201) is arranged
Figure FDA0003045021880000101
And concentration of water vapor
Figure FDA0003045021880000102
And/or
The second dust removal system (402) is connected with the second conveyor (302) through a sixth pipeline (L9); a second flowmeter (1102) is arranged on the sixth pipeline (L9); a feeding pipeline (L10) is arranged between an activated carbon inlet of the adsorption tower (1) and the second conveyor (302), a sixth pipeline (L9) or the feeding pipeline (L10) is provided with a second online flue gas analyzer (1202), and the second online flue gas analyzer (1202) detects and analyzes the concentration of sulfur dioxide in the flue gas in the pipeline or the pipeline at the position where the second online flue gas analyzer is arranged
Figure FDA0003045021880000103
And concentration of water vapor
Figure FDA0003045021880000104
22. A system for determining and treating rotary valve gas leaks for use in the method according to any one of claims 1 to 21, the system comprising an adsorption column (1), a desorption column (7), a second rotary valve (202), a second conveyor (302), a second dust removal system (402), a second pressure gauge (502), a raw flue gas delivery line (L0), a sixth line (L9); wherein the raw flue gas conveying pipeline (L0) is connected to the flue gas inlet of the adsorption tower (1); the second conveyor (302) is connected with the activated carbon outlet of the desorption tower (7) and the activated carbon inlet of the adsorption tower (1); a second rotary valve (202) is arranged at an active carbon inlet of the adsorption tower (1); the second dust removal system (402) is connected with the second conveyor (302) through a sixth pipeline (L9); a second pressure gauge (502) is arranged on the second conveyor (302).
23. The system of claim 22, wherein: a second flowmeter (1102) is provided on the sixth pipeline (L9).
24. The system of claim 22, wherein: a feeding pipeline (L10) is arranged between the active carbon inlet of the adsorption tower (1) and the second conveyor (302); a second rotary valve (202) is arranged on the feed line (L10); a fourth line (L6) which leads from the feed line (L10) downstream of the second rotary valve (202) merges with the second foreign gas supply line (L7) and is connected via a fifth line (L8) to the raw flue gas supply line (L0).
25. The system of claim 24, wherein: and a second valve (602) is arranged on the fourth pipeline (L6).
26. The system of claim 24, wherein: a fourth valve (802) is arranged on the second external gas conveying pipeline (L7); and/or
And a second detection device is arranged on the fifth pipeline (L8).
27. The system of claim 26, wherein: the second detection device is a second thermometer (902) or a second CO detector (1002).
28. The system of claim 24, wherein: a second on-line flue gas analyzer (1202) is arranged on the feeding pipeline (L10); and/or
The other end of the second external gas conveying pipeline (L7) is connected to a cooling section gas outlet (701) of the desorption tower (7).
29. The system according to any one of claims 22-28, wherein: the system also comprises a first rotary valve (201), a first conveyor (301), a first dust removal system (401), a first pressure gauge (501) and a third pipeline (L4); wherein the first conveyor (301) is connected with an activated carbon outlet of the adsorption tower (1) and an activated carbon inlet of the desorption tower (7); a first rotary valve (201) is arranged at an active carbon outlet of the adsorption tower (1); the first dust removal system (401) is connected with the first conveyor (301) through a third pipeline (L4); a first pressure gauge (501) is arranged on the first conveyor (301).
30. The system of claim 29, wherein: a first flow meter (1101) is arranged on the third pipeline (L4).
31. The system of claim 29, wherein: a blanking pipeline (L5) is arranged between the active carbon outlet of the adsorption tower (1) and the first conveyor (301); the first rotary valve (201) is arranged on the blanking pipeline (L5); a first line (L1) which leads out from the blanking line (L5) and is located upstream of the first rotary valve (201) is combined with the first foreign gas supply line (L2) and then connected to the raw flue gas supply line (L0) via a second line (L3).
32. The system of claim 31, wherein: a first valve (601) is arranged on the first pipeline (L1).
33. The system of claim 31, wherein: a third valve (801) is arranged on the first external gas conveying pipeline (L2); and/or
The second pipeline (L3) is provided with a first detection device.
34. The system of claim 33, wherein: the first detection device is a first thermometer (901) or a first CO detector (1001).
35. The system according to any one of claims 31-34, wherein: a first on-line flue gas analyzer (1201) is arranged on the blanking pipeline (L5); and/or
The other end of the first external gas conveying pipeline (L2) is connected to a cooling section gas outlet (701) of the desorption tower (7).
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