CN109850852A - Crouse's air-distribution control system based on sulfur recovery facility - Google Patents
Crouse's air-distribution control system based on sulfur recovery facility Download PDFInfo
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Abstract
The invention belongs to Crouse's recovery technology of sulfur technical field, it is related to Crouse's air-distribution control system based on sulfur recovery facility.The device includes fuel element, claus reaction unit and distribution unit, and the valve for being connected to the pipeline of the above unit according to the technological requirements and being arranged on pipeline；H is provided on pipeline between the level-one converter and secondary reformer of claus reaction unit2S/SO2On-line checking instrument.Crouse's air-distribution control system of the invention is by H2S/SO2The set-up site of in-line analyzer is exported by Crouse's second reactor, and change is exported in Crouse's first-stage reactor, reduces the lag time of detection feedback；Utilize H in Process Gas2S content control air distribution, alleviate as ratio control it is unstable caused by shake problem.
Description
Technical field
The invention belongs to Crouse's recovery technology of sulfur technical field, it is related to Crouse's air distribution based on sulfur recovery facility
Control system.
Background technique
Existing sour gas recovery technology of sulfur, capital equipment include burner for producing sulfur along airflow direction, two-stage gram labor
This reactor etc..High temperature thermal response occurs in burner for producing sulfur, the H of one third in feeding gas2S is combusted into SO2, three points
Two H2The SO of S and generation2Claus reaction occurs, the mixed gas for leaving combustion chamber is cooled, and then Molten sulphur is divided
From gas successively enters two-stage claus reaction device again and claus catalytic reaction occurs, and further increasing sulfur recovery rate will be sour
H in property gas2S is converted into sulphur recovery.I&C system is utilized in entire technique, it is ensured that device held stationary, efficient operation.
For example, forming in-line analyzer in acid gas pipeline setting sour gas, H is set after second level claus reaction device2S/SO2Ratio
Analyzer realizes effective control to air distribution.
Crouse's reaction of Salmon-Saxl overall reaction equation can be expressed as follows:
2H2S+SO2=S2+2H2O+Q (heat release)
As the reactant H in claus reaction device2S、SO2Concentration is cured closer to equivalent reaction ratio, the conversion ratio of the reaction
It is high.Therefore the air distribution of control claus process is the key that improve claus process conversion ratio.
Traditional Crouse's air-distribution control system use " ratio+feedforward " double loop mode, the 80 of the main total volume of air supply of wind Zhan
It~90% and keeps proportional with sour gas flow, and changes, referred to as ratio control with the fluctuation of sour gas flow
System.Secondary wind accounts for always matching the 10~20% of air quantity, by the H of final stage claus reaction device outlet setting2S/SO2In-line analyzer pair
Reaction result carries out real-time monitoring, and will test result with standard value compared with afterwards to secondary wind progress amendment appropriate, referred to as before
Feedback control.
Ratio control model mainly copes with the fluctuation of sour gas flow, and main wind tracks sour gas flow according to a certain percentage
Variation, and the amplitude of accommodation is bigger, belongs to extensive adjustment modes.
Feed-forward control mode mainly copes with the variation of acid gas concentration, is installed on the online of Crouse's final stage reactor outlet
Detect H in instrument monitoring reactor product2S and SO2Ratio variation, is accurately adjusted by PID controller pair wind flow make
Claus process reactor outlet H2S and SO2Ratio level off to ideal response ratio.
Ratio+feedforward control system has the characteristics that control loop is simple, but due to H2S/SO2In-line analyzer peace
It is exported mounted in final stage claus reaction device, the testing result of acquisition always lags behind the real-time change of sour gas.When Crouse end
The Process Gas composition data of stage reactor outlet is from H2S/SO2After in-line analyzer shows, since sour gas and air are mixed
Combination burning simultaneously needs the regular hour by the reaction of claus reaction device, and sour gas is matched before what is actually indicated is a period of time
Landscape condition.
Meanwhile feedforward control is actually constantly to compare and carry out a modified process according to target value and measured value,
The process exacerbates the time lag of control system, and the control system of existing ratio+feedforward is caused to be unable to reach higher gram of labor
This reaction yield.
Summary of the invention
It is an object of the invention to overcome drawbacks described above existing for existing process units and technique, proposes and returned based on sulphur
Crouse's air-distribution control system of receiving apparatus.Technique of the invention can greatly shorten lag time, improve the accurate of air distribution
Degree, to improve the conversion ratio of claus process.
The present invention, which is that the following technical solution is employed, to be realized:
A kind of Crouse's air-distribution control system based on sulfur recovery facility, including fuel element, claus reaction unit
With distribution unit, and the valve for being connected to the pipeline of the above unit according to the technological requirements and being arranged on pipeline, the burning list
First sulphur waste heat boiler processed for including burner for producing sulfur and being connected to burner for producing sulfur escape pipe；Burner for producing sulfur be provided with blast pipe and
Sour gas air inlet pipe, the Claus unit include level-one condensate cooler, heater, level-one converter, B-grade condensation cooling
Device, secondary reformer, three-level condensate cooler, tail gas liquid separation tank；The distribution unit includes sulphur air blower processed, is located at system
Sulphur air blower main air duct and main wind volume damper and secondary wind volume damper in secondary air piping, main air duct and secondary air hose
Road converges to be connected to the blast pipe of burner for producing sulfur；
It is provided with the detection instrument of flow on the main air duct and secondary air piping, basis is set on main wind volume damper
The PID controller that setting value is controlled is provided with the flow instrumentation of measurement sour gas flow in sour gas air inlet pipe, main
PID controller on the signal output end of air piping and the flow instrumentation in sour gas air inlet pipe and main wind volume damper
Signal input part electrical connection；H is provided on pipeline between level-one converter and secondary reformer2S/SO2On-line detector
Table, H2S/SO2The signal that flow instrumentation in on-line checking instrument and secondary air piping is connected to the DCS control system is defeated
Enter end, the flow controller being arranged on secondary wind volume damper is connected to the signal output end of the DCS control system.
Further, the sour gas air inlet pipe includes cleaning sour gas air inlet pipe and the air inlet pipe of sour gas containing ammonia, cleaning
The detection instrument of measurement sour gas flow is respectively arranged on the pipeline that sour gas inlet pipe, the air inlet pipe of sour gas containing ammonia are connected to.
Further, the H2S/SO2On-line checking instrument is set on the outlet conduit of B-grade condensation cooler.
Crouse's air distribution control of above system includes following process:
(1) it is formed based on sour gas and sour gas theory air distribution coefficient is calculated according to chemical equation, according to acid
Property throughput, set initial main airstream amount and secondary wind flow, combustion reaction occurs in burner for producing sulfur for sour gas after ventilation；
(2) level-one converter and secondary reformer are sequentially entered from the Process Gas that burner for producing sulfur is discharged, carries out Crouse
Reaction；
(3) H between level-one converter and secondary reformer2S/SO2H in on-line checking instrument detection process gas2S and SO2
Content, DCS control system collect H2S/SO2The data of on-line checking instrument, the secondary wind original setting value in amendment step (1), according to
Secondary wind volume damper is adjusted according to secondary wind new settings value, controls secondary wind flow；
(4) H is completed2S and SO2The Process Gas of catalyzed conversion, eventually enters into exhaust gas processing device；The sulphur that catalysis reaction generates
Sulphur simple substance flows into sulfur recovery facility.
Specifically, according to sour gas air quantity, PID control system regulating main air setting value, regulating main air in the step (1)
Volume damper controls the flow of main wind, as follows according to formula:
Main wind is controlled according to the flow proportional of sour gas, and calculation formula is as follows:
QMain wind setting value=QSour gas×K0Formula I
In formula I:
QSour gas: sour gas flow, Nm3/h；
K0: sour gas theory air distribution coefficient is formed based on sour gas and initial value is calculated according to chemical equation
It adjusts according to the actual operation, which is this field conventional Calculation Method.
Wherein, the initial secondary wind flow of setting in the step (1), secondary wind flow adjusts to the 1/5 of secondary wind flow range~
4/5。
Specifically, according to H in the step (3)2S/SO2Ratio, the air quantity that secondary wind needs to track after controlled load case variation,
Secondary wind new settings value is set, secondary wind volume damper is adjusted, as follows according to formula:
Secondary wind new settings value calculation formula:
QSecondary wind new settings value=QSecondary wind original setting value+(QSour gas+QAir)×K×(CH2S-2CSO2The formula of) × 2.5 II
In formula II:
QSecondary wind original setting value: the original flow setting value of secondary wind regulating valve, Nm3/h；
QSecondary wind new settings value: the flow setting value that secondary wind regulating valve needs, Nm3/h；
QSour gas: sour gas flow, Nm3/h；
QAir: according to formula I, total airflow amount is QMain wind setting valueAnd QSecondary wind original setting valueThe sum of, Nm3/h；
K: volume-correction coefficient is calculated volume according to the chemical equation of each component based on sour gas composition and repairs
Positive coefficient, the calculation method are this field conventional Calculation Method；
CH2S: H2S/SO2In-line analyzer detects H2S concentration, mol%；
CSO2: H2S/SO2In-line analyzer detects SO2Concentration, mol%.
In the present invention, the control for operating air quantity equipment and its associated can take over the flow detection configured through the invention
Instrument, pid stream amount controller and DCS control system are realized, realize process flow switching control according to pre-set programs.
Steam heater, electric heater, on-line heating furnace, high-temp mixing valve etc. can be used in heater in system of the invention
Heating device.
The beneficial effects of the present invention are:
1) Crouse's air-distribution control system of the invention based on sulfur recovery facility, by H2S/SO2In-line analyzer is set
It sets place to be exported by Crouse's second reactor, change is exported in Crouse's first-stage reactor, when reducing the lag of detection feedback
Between；Utilize H in Process Gas2S、SO2Content control air distribution, alleviate as ratio control it is unstable caused by shake problem.
2) H that blowing system of the invention is exported according to Crouse's first-stage reactor2S/SO2In-line analyzer H2S concentration is straight
It connects and calculates oxygen demand and assign secondary wind regulating valve as target tracking value, no longer adjusted by pid loop, when shortening adjustment
Between.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described.
Fig. 1 is the schematic diagram for Crouse's air-distribution control system based on sulfur recovery facility that embodiment 1 provides；
Fig. 2 is the schematic diagram for traditional Crouse's air-distribution control system that comparative example 1 provides；
Figure label: 1 burner for producing sulfur, 2 sulphur waste heat boilers processed, 3 level-one condensate coolers, 4 heaters, the conversion of 5 level-ones
Device, 6 Process Gas heat exchangers, 7 B-grade condensation coolers, 8 secondary reformers, 9 three-level condensate coolers, 10 tail gas liquid separation tanks, 11
Sulphur air blower processed, 12 main wind volume dampers, 13 secondary wind volume dampers, A sour gas air inlet pipe, B tail gas escape pipe.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.Experimental method used in following embodiments is such as without special
Illustrate, is conventional method.Equipment as used in the following examples, material, reagent etc. unless otherwise specified can be from business
Approach obtains.In the description of the present invention, the direction or position of the instructions such as term " on ", "lower", "left", "right", "inner", "outside"
The term of relationship is direction based on the figure or positional relationship, this is intended merely to facilitate description, rather than is indicated or dark
Show that described device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this
The limitation of invention.
In the present invention, control system controls H2S/SO2On-line checking instrument, volume damper are common in the prior art
Means, PID controller is classical control system.
Embodiment 1
As shown in Figure 1, Crouse air-distribution control system of the present embodiment based on sulfur recovery facility, including fuel element,
Claus reaction unit and distribution unit, and the valve for being connected to the pipeline of the above unit according to the technological requirements and being arranged on pipeline
Door, which is characterized in that
The fuel element includes burner for producing sulfur 1 and the sulphur waste heat boiler 2 processed for being connected to burner for producing sulfur escape pipe；Sulphur processed
Combustion furnace is provided with blast pipe and sour gas air inlet pipe A；
The Claus unit include the level-one condensate cooler 3 for being sequentially communicated setting, heater 4, level-one converter 5,
B-grade condensation cooler 7, secondary reformer 8, three-level condensate cooler 9, tail gas liquid separation tank 10；Level-one condensate cooler and sulphur processed
The tail gas escape pipe of waste heat boiler is connected, and level-one condensate cooler is provided with molten sulfur outlet tube；The setting of B-grade condensation cooler
There are the air inlet pipe being connected to level-one converter escape pipe, the escape pipe being connected to secondary reformer air inlet pipe, B-grade condensation is cooling
Device air inlet pipe, escape pipe are partially set to inside Process Gas heat exchanger 6, Process Gas heat exchanger, B-grade condensation cooler difference
It is provided with molten sulfur outlet tube；The tail gas escape pipe that three-level condensate cooler is provided with molten sulfur outlet tube, is connected to tail gas liquid separation tank；
The tail gas escape pipe B that tail gas liquid separation tank is provided with molten sulfur outlet tube, is in communication with the outside；The liquid stream outlet tube and sulphur of each equipment
Sealed cans connection；
The distribution unit includes sulphur air blower 11 processed, the main wind wind being located on two wind pipes of sulphur air blower processed
Adjustable valve 12 and secondary wind volume damper 13, main wind and secondary wind both are from sulphur air blower processed, and main wind air quantity is big, and secondary wind flow is small
But it is accurate, main wind enters burner for producing sulfur after converging with secondary wind together, and two wind pipes of sulphur air blower processed converge and sulphur processed
The blast pipe of combustion furnace is connected to.
It is provided with the detection instrument of flow on the main air duct and secondary air piping, basis is set on main wind volume damper
The PID controller that setting value is controlled is provided with the flow instrumentation of measurement sour gas flow in sour gas air inlet pipe, main
PID controller on the signal output end of air piping and the flow instrumentation in sour gas air inlet pipe and main wind volume damper
Signal input part electrical connection.
H2S/SO2On-line checking instrument is specifically set on the outlet conduit of B-grade condensation cooler, B-grade condensation cooler
Outlet temperature is suitable for, and the sulphur mist in Process Gas is less, can effectively protect the service life of in-line meter sampling system.H2S/
SO2Flow instrumentation in on-line checking instrument and secondary air piping is connected to the signal input part of the DCS control system, secondary
The flow controller being arranged on wind volume damper is connected to the signal output end of the DCS control system.
Sour gas air inlet pipe includes cleaning sour gas air inlet pipe and the air inlet pipe of sour gas containing ammonia, and cleaning sour gas inlet pipe contains
The detection instrument of measurement sour gas flow is respectively arranged on the pipeline of ammonia sour gas air inlet pipe connection.
With 100,000 tons/year of sulfur recovery facility Design cooling load operating conditions, gram provided by the invention based on sulfur recovery facility
The control process of Louth air-distribution control system includes step in detail below:
(1) it is formed based on sour gas and sour gas theory air distribution coefficient is calculated according to chemical equation, according to acid
Property throughput, set initial main wind volume damper and secondary wind volume damper；Sour gas enters after mixing in proportion with main wind
Combustion reaction occurs for burner for producing sulfur, sour gas；
(2) enter sulphur waste heat boiler cooling processed from the pyroprocess gas that burner for producing sulfur is discharged, cooling Process Gas enters
Level-one condensate cooler；Sulphur in Process Gas is coagulated in level-one condensate cooler for molten sulfur, is entered sulphur after molten sulfur trapping separation and is sealed
Tank, the heated device heating of subsequent process gas, into level-one converter；Under the action of catalyst in level-one converter, process
H in gas2S and SO2Claus reaction is carried out, elementary sulfur is converted into, the pyroprocess gas of discharge level-one converter passes through Process Gas
Heat exchanger enters B-grade condensation cooler；In Process Gas heat exchanger, pyroprocess gas from level-one converter with come from two
The chilling process gas of grade condensate cooler exchanges heat, and the pyroprocess gas of cooling enters B-grade condensation cooler；It is cold in second level
In solidifying cooler, Process Gas is further cooled down, and sulphur therein coagulates for molten sulfur, enters sulphur sealed cans after molten sulfur trapping separation, then cold
But Process Gas passes through H2S/SO2On-line checking instrument, after the heating of reentry procedure gas heat exchanger, into secondary reformer；
(3)H2S/SO2H in on-line checking instrument detection process gas2S and SO2Content, DCS system collect H2S/SO2Online
The data of instrument are detected, the secondary wind original setting value in amendment step (1) adjusts secondary wind air quantity according to secondary wind new settings value and adjusts
Valve controls secondary wind flow；
(4) in secondary reformer, remaining H in Process Gas2S and SO2Further occurrence catalyzed conversion, the height after conversion
Warm Process Gas is further cooled down through three-level condensate cooler enters tail gas liquid separation tank, in three-level condensate cooler and tail gas liquid separation tank
The molten sulfur of condensation be captured separation after enter sulphur sealed cans；Sulphur tail gas processed enters vent gas treatment part, recycles the molten sulfur in sulphur sealed cans.
Specifically, sour gas H in step (1)2S concentration 85%, initial acidity throughput 1060Nm3/ h, PID control system
System controls the flow of main wind according to main wind setting value, regulating main air volume damper, as follows according to formula:
Main wind is controlled according to the flow proportional of sour gas, and calculation formula is as follows:
QMain wind setting value=QSour gas×K0Formula I
In formula I:
QSour gas: sour gas flow, Nm3/h；
K0: sour gas theory air distribution coefficient is formed based on sour gas and is calculated as 2 according to chemical equation.
It is calculated according to formula I, sets initial main airstream amount as 2120Nm3/ h, secondary wind flow are preset as 100Nm3/h。
Sulphur waste heat boiler high temperature Process Gas processed is cooled to 320 DEG C in step (2), and process is gas-cooled in level-one condensate cooler
But to 160 DEG C, Process Gas is warming up to 240 DEG C in heater, and Process Gas is cooled to 275 DEG C in Process Gas heat exchanger, B-grade condensation
Process Gas is cooled to 160 DEG C in cooler, and Process Gas is warming up to 210 DEG C in Process Gas heat exchanger, mistake in three-level condensate cooler
Journey air cooling is to 160 DEG C.
H in step (3)2S/SO2On-line checking instrument detects SO2Concentration 0.3% (mol%), H2S concentration 0.6%
(mol%), when sour gas flow is constant but concentration changes, in-line meter testing result changes, testing result
SO2Concentration 0.2% (mol%), H2S concentration 0.8% (mol%)；At this time therefore main wind is protected since the flow of sour gas does not change
It holds motionless；And secondary wind will change according to testing result: the air quantity that secondary wind needs to track after the variation of DCS system controlled load case,
Secondary wind new settings value is set, secondary wind volume damper is adjusted, as follows according to formula:
Secondary wind new settings value calculation formula:
QSecondary wind new settings value=QSecondary wind original setting value+(QSour gas+QAir)×K×(CH2S-2CSO2The formula of) × 2.5 II
In formula II:
QSecondary wind original setting value: the original flow setting value of secondary wind regulating valve, Nm3/h；
QSecondary wind new settings value: the flow setting value that secondary wind regulating valve needs, Nm3/h；
QSour gas: sour gas flow, Nm3/h；
QAir: total airflow amount (QMain wind setting value+QSecondary wind original setting value), Nm3/h；
K: volume-correction coefficient is calculated volume according to the chemical equation of each component based on sour gas composition and repairs
Positive coefficient；
CH2S: H2S/SO2In-line analyzer detects H2S concentration, mol%；
CSO2: H2S/SO2In-line analyzer detects SO2Concentration, mol%.
It is calculated according to formula II, main airstream amount keeps 2120Nm3/ h, QSecondary wind original setting valueFor 100Nm3/ h, QSour gasFor 1060Nm3/ h,
QAirFor 2200Nm3/ h, CH2SIt is 0.008, CSO2It is 0.002；Volume-correction coefficient K is calculated according to chemical equation,
It is 0.87；
QSecondary wind new settings value=128.5Nm3/h；
The setting value of secondary wind flow will be adjusted to rapidly 128.5Nm according to calculated value3/ h, secondary wind regulating valve is according to new settings
The flow of secondary wind is adjusted in place rapidly by value, and adjustment time is about 28.82s；Utilize H in Process Gas2S content, which accurately controls, matches
Wind, alleviate as ratio control it is unstable caused by shake problem.
Comparative example 1
As shown in Fig. 2, comparative example 1 and the difference of embodiment 1 are, H in the distribution unit in the system2S/SO2Online inspection
Survey the gas outlet that instrument is set to tail gas liquid separation tank.With 100,000 tons/year of sulfur recovery facility Design cooling load condition calculating sulphur furnaces
It is as shown in table 1 below to flow through the entire claus process consuming time for Process Gas after burning:
The entire claus process short time consumption table of 1. comparative example of table 1
When on-line checking instrument is mounted on claus process final stage reactor outlet, the sour gas of unit volume enters certainly
Claus process starts processed until reaction end, which obtains the time spent by reaction result, is up to~57.02s, i.e., each time
The period optimized and revised is 57.02s, hence it is evident that higher than the adjustment time in embodiment 1.
Certainly, above content is only presently preferred embodiments of the present invention, be should not be construed as limiting to implementation of the invention
Example range.
The present invention is also not limited to the example above, and those skilled in the art are in essential scope of the invention
Interior made all the changes and improvements etc., should all belong in patent covering scope of the invention.
Claims (7)
1. a kind of Crouse's air-distribution control system based on sulfur recovery facility, including fuel element, claus reaction unit and
Distribution unit, and the valve for being connected to the pipeline of the above unit according to the technological requirements and being arranged on pipeline, the fuel element
Including burner for producing sulfur (1) and the sulphur waste heat boiler (2) processed for being connected to burner for producing sulfur (1) escape pipe；Burner for producing sulfur (1) setting
There are blast pipe and sour gas air inlet pipe (A), the Claus unit includes level-one condensate cooler (3), heater (4), level-one
Converter (5), B-grade condensation cooler (7), secondary reformer (8), three-level condensate cooler (9), tail gas liquid separation tank (10),
It is characterized in that, the distribution unit includes sulphur air blower (11) processed, is located at sulphur air blower (11) main air duct processed
With in secondary air piping main wind volume damper (12) and secondary wind volume damper (13) and DCS control system, main air duct with
Secondary air piping is converged to be connected to the blast pipe of burner for producing sulfur (1)；
It is provided with the detection instrument of flow on the main air duct and secondary air piping, basis is set on main wind volume damper (12)
The PID controller that setting value is controlled is provided with the flow detector of measurement sour gas flow in sour gas air inlet pipe (A)
The signal output end of table, main air duct and the flow instrumentation in sour gas air inlet pipe (A) and main wind volume damper (12)
On PID controller signal input part electrical connection；It is arranged on pipeline between level-one converter (5) and secondary reformer (8)
There is H2S/SO2On-line checking instrument, H2S/SO2Flow instrumentation in on-line checking instrument and secondary air piping is connected to described
The signal input part of DCS control system, the flow controller being arranged on secondary wind volume damper (13) are connected to the DCS control
The signal output end of system.
2. Crouse's air-distribution control system according to claim 1 based on sulfur recovery facility, which is characterized in that described
Sour gas air inlet pipe (A) includes cleaning sour gas air inlet pipe and the air inlet pipe of sour gas containing ammonia, and cleaning sour gas inlet pipe contains propylhomoserin
The detection instrument of measurement sour gas flow is respectively arranged on the pipeline of gas air inlet pipe connection.
3. Crouse's air-distribution control system according to claim 1 based on sulfur recovery facility, which is characterized in that described
H2S/SO2On-line checking instrument is set on the outlet conduit of B-grade condensation cooler (7).
4. Crouse's air-distribution control system according to claim 1-3 based on sulfur recovery facility, feature
It is, Crouse's air distribution control of the system includes following process:
(1) it is formed based on sour gas and sour gas theory air distribution coefficient is calculated according to chemical equation, according to sour gas
Flow sets initial main airstream amount and secondary wind flow, and combustion reaction occurs in burner for producing sulfur for sour gas after ventilation；
(2) level-one converter and secondary reformer are sequentially entered from the Process Gas that burner for producing sulfur is discharged, carries out claus reaction；
(3)H2S/SO2H in on-line checking instrument detection process gas2S and SO2Content, DCS control system collect H2S/SO2Online
The data of instrument are detected, the secondary wind original setting value in amendment step (1) adjusts secondary wind air quantity according to secondary wind new settings value and adjusts
Valve controls secondary wind flow；
(4) H is completed2S and SO2The Process Gas of catalyzed conversion, eventually enters into exhaust gas processing device；The sulphur list that catalysis reaction generates
Mass flow enters sulfur recovery facility.
5. Crouse's air-distribution control system according to claim 4 based on sulfur recovery facility, which is characterized in that described
According to sour gas air quantity in step (1), PID control system regulating main air setting value, regulating main air volume damper controls main wind
Flow, according to formula it is as follows:
Main wind is controlled according to the flow proportional of sour gas, and calculation formula is as follows:
QMain wind setting value=QSour gas×K0Formula I
In formula I:
QSour gas: sour gas flow, Nm3/h；
K0: sour gas theory air distribution coefficient is calculated, and according to practical fortune based on sour gas each component chemical equation
The adjustment of market condition.
6. Crouse's air-distribution control system according to claim 5 based on sulfur recovery facility, which is characterized in that described
The initial secondary wind flow of setting, secondary wind flow are adjusted to the 1/5~4/5 of secondary wind flow range in step (1).
7. Crouse's air-distribution control system according to claim 4 based on sulfur recovery facility, which is characterized in that
According to H in the step (3)2S/SO2Ratio, the air quantity that secondary wind needs to track after controlled load case variation set secondary wind and newly set
Definite value adjusts secondary wind volume damper, as follows according to formula:
Secondary wind new settings value calculation formula:
QSecondary wind new settings value=QSecondary wind original setting value+(QSour gas+QAir)×K×(CH2S-2CSO2The formula of) × 2.5 II
In formula II:
QSecondary wind original setting value: the original flow setting value of secondary wind regulating valve, Nm3/h；
QSecondary wind new settings value: the flow setting value that secondary wind regulating valve needs, Nm3/h；
QSour gas: sour gas flow, Nm3/h；
QAir: according to formula I, total airflow amount is QMain wind setting valueAnd QSecondary wind original setting valueThe sum of, Nm3/h；
K: volume-correction coefficient is calculated in volume-correction coefficient, the chemical equation based on sour gas each component；
CH2S: H2S/SO2In-line analyzer detects H2S concentration, mol%；
CSO2: H2S/SO2In-line analyzer detects SO2Concentration, mol%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113739592A (en) * | 2021-09-18 | 2021-12-03 | 山东三维化学集团股份有限公司 | Automatic control method and system for sulfur production combustion furnace |
| CN114132900A (en) * | 2021-12-07 | 2022-03-04 | 北京航化节能环保技术有限公司 | Sulfur recovery device switched by oxygen-enriched/air method in coking industry |
-
2019
- 2019-04-12 CN CN201910292618.2A patent/CN109850852A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113739592A (en) * | 2021-09-18 | 2021-12-03 | 山东三维化学集团股份有限公司 | Automatic control method and system for sulfur production combustion furnace |
| CN113739592B (en) * | 2021-09-18 | 2023-12-08 | 山东三维化学集团股份有限公司 | Automatic control method and system for sulfur-making combustion furnace |
| CN114132900A (en) * | 2021-12-07 | 2022-03-04 | 北京航化节能环保技术有限公司 | Sulfur recovery device switched by oxygen-enriched/air method in coking industry |
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Application publication date: 20190607 |