CN113946173B - Temperature control system, method and device for analytical tower - Google Patents
Temperature control system, method and device for analytical tower Download PDFInfo
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- CN113946173B CN113946173B CN202010680500.XA CN202010680500A CN113946173B CN 113946173 B CN113946173 B CN 113946173B CN 202010680500 A CN202010680500 A CN 202010680500A CN 113946173 B CN113946173 B CN 113946173B
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- G05D23/32—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature with provision for adjustment of the effect of the auxiliary heating device, e.g. a function of time
Abstract
The application discloses temperature control system, method and device of analytic tower, the system includes: the analysis tower is connected with the hot-blast stove and heats the analysis tower, and the bottom of the analysis tower is provided with a detection device, wherein the control end is configured to execute the following steps: firstly, calculating the current actual analysis efficiency according to the parameters measured by the detection device; then judging whether the current actual analysis efficiency is equal to a preset target analysis efficiency or not; and if the current actual analysis efficiency is not equal to the target analysis efficiency, adjusting the temperature of the hot blast stove according to an analysis temperature adjustment table until the actual analysis efficiency corresponding to the adjusted analysis temperature is equal to the target analysis efficiency, wherein the adjusted analysis temperature is the optimal analysis temperature. By adopting the scheme, the optimal analysis temperature can be found according to the actual analysis efficiency, so that the operation energy consumption of the analysis tower is the lowest on the premise of meeting the target analysis efficiency, the resources are saved, and the operation cost of the system is reduced.
Description
Technical Field
The application relates to the technical field of flue gas purification, in particular to a temperature control system, method and device of an analytic tower.
Background
For industrial flue gas, especially for sintering flue gas generated by sintering machine in steel industry, it is an ideal scheme to adopt a desulfurization and denitrification system comprising an activated carbon adsorption tower and a desorption tower to purify flue gas. In a desulfurization and denitrification system, an activated carbon adsorption tower is used for adsorbing pollutants including sulfur oxides, nitrogen oxides and dioxin from sintering flue gas or waste gas, and an analytic tower is used for carrying out high-temperature analytic regeneration on the activated carbon adsorbed with the pollutants, namely when the analytic temperature is higher than 350 ℃, the pollutants such as the sulfur oxides, the nitrogen oxides and the dioxin adsorbed on the activated carbon are quickly analyzed or decomposed in the analytic tower (sulfur dioxide is analyzed, and the nitrogen oxides and the dioxin are decomposed), and the analytic efficiency of the activated carbon is further improved along with the increase of the temperature, so that the regeneration time is shortened.
Fig. 1 shows an activated carbon desulfurization and denitrification system, which comprises: the device comprises an adsorption tower 1 and a desorption tower 2, wherein the lower part of the side surface of the adsorption tower 1 is connected with a booster fan 3, the bottom of the adsorption tower 1 is provided with a discharge round roller 101, and a first star-shaped ash discharge valve X1 is arranged below the discharge round roller 101; the analytic tower 2 is connected with an acid making system 4, a second star-shaped ash discharge valve X2 is arranged at the bottom of the analytic tower 2, and an activated carbon vibrating screen 5 is arranged below the second star-shaped ash discharge valve X2. The sintering flue gas purification process by using the system comprises the following steps: the original sintering flue gas after dust removal passes through a booster fan 3, the original sintering flue gas is sent to an adsorption tower 1 after being pressurized, sulfur oxides in the sintering flue gas are adsorbed by activated carbon in the adsorption tower 1 and are catalytically oxidized into sulfuric acid, meanwhile, nitrogen oxides and ammonia gas for denitration react in the adsorption tower 1 to generate ammonium nitrate, and the nitrogen oxides and the ammonia gas generate denitration reaction to produce nitrogen and water, the sulfuric acid and the ammonium nitrate generated by the reaction are adsorbed by the activated carbon, the purified flue gas is discharged through an exhaust port on the adsorption tower 1, the activated carbon with saturated adsorption is discharged into a hopper of a first activated carbon conveyor G1 through a discharge round roller 101 and a first star-shaped ash discharge valve X1, and then the activated carbon with saturated adsorption is conveyed to an analysis tower 2 through the first activated carbon conveyor G1. The active carbon with saturated adsorption enters an analytical tower 2, the high-temperature gas in the analytical tower 2 carries out indirect heating analysis on the active carbon with saturated adsorption, and a large amount of SO with high concentration generated in the analysis process 2 And a large amount of water and other pollutant (SRG) gas are sent to an acid making system 4 for making acid, the activated carbon after being heated and analyzed is unloaded onto an activated carbon vibrating screen 5 through a second star-shaped ash unloading valve X2, coarse-particle activated carbon is screened out through the activated carbon vibrating screen 5 and is discharged onto a second activated carbon conveyor G2, and the coarse-particle activated carbon is input into the adsorption tower 1 again through the second activated carbon conveyor G2 for recycling.
In the above process, the analysis temperature of the analysis column is usually set to a fixed temperature by manual experience, and the analysis temperature is usually set to a high value in order to completely analyze the activated carbon, but the method of fixing the analysis temperature does not consider the content of the pollutants adsorbed by the activated carbon in the analysis column, and the higher the analysis temperature is, the higher the energy consumption of the system is, which not only wastes resources but also increases the operation cost of the system, so how to obtain the optimum analysis temperature is a problem to be solved urgently.
Disclosure of Invention
The application provides a temperature control system, a temperature control method and a temperature control device for an analytic tower, which are used for solving the problem of obtaining the optimal analytic temperature of the analytic tower.
In a first aspect, an embodiment of the present application provides a temperature control system of a desorption tower, where the temperature control system includes: the analysis tower and the control end;
the upper part of the desorption tower is a heating section, the lower part of the heating section is provided with a heating gas inlet, and the heating gas inlet is connected to an air outlet of the hot blast stove; a temperature sensor is arranged at a position close to a heating gas inlet pipeline of the desorption tower; the bottom of the desorption tower is provided with a detection device, and the detection device is arranged between the second star-shaped ash discharge valve and the activated carbon vibrating screen; wherein:
the control terminal is configured to perform the following steps:
calculating the current actual analysis efficiency according to the parameters for calculating the analysis efficiency measured by the detection device;
judging whether the current actual analysis efficiency is equal to a preset target analysis efficiency or not;
if the current actual analysis efficiency is not equal to the target analysis efficiency, adjusting the temperature of the hot blast stove until the actual analysis efficiency corresponding to the adjusted analysis temperature is equal to the target analysis efficiency, wherein the adjusted analysis temperature is the optimal analysis temperature;
wherein adjusting the temperature of the hot blast stove comprises:
acquiring the current analysis temperature of the analysis tower, wherein the current analysis temperature is measured by a temperature sensor;
and adjusting the air outlet temperature of the hot blast stove according to the current analysis temperature and a preset analysis temperature adjustment table.
With reference to the first aspect, in one implementation manner, a heating gas outlet is arranged at the upper part of the heating section, the heating gas outlet is connected to a gas inlet of the hot blast stove through a hot air circulating fan, and a valve is arranged at an outlet of the hot air circulating fan;
the lower part of the heating section is sequentially provided with a transition section and a heat exchange cooling section, the lower part of the transition section is provided with an SRG gas outlet and is connected to an acid making system, the lower part of the heat exchange cooling section is provided with a heat exchange cooling gas inlet, and the heat exchange cooling gas inlet is connected with a cooling fan;
adjusting the air outlet temperature of the hot blast stove, comprising:
if the current actual analysis efficiency is smaller than the target analysis efficiency, the gas flow and the corresponding air flow of the hot blast stove are increased to increase the air outlet temperature of the hot blast stove, or the valve opening degree of a hot air circulating fan is increased, the circulating hot air quantity of the hot air circulating fan is increased, and the air outlet temperature of the hot blast stove is increased.
With reference to the first aspect, in an implementation manner, the adjusting of the outlet air temperature of the hot blast stove further includes:
if the current actual analysis efficiency is larger than the target analysis efficiency, reducing the gas flow of the hot blast stove to reduce the air outlet temperature of the hot blast stove, or reducing the valve opening degree of the hot air circulating fan to further reduce the air outlet temperature of the hot blast stove.
With reference to the first aspect, in an implementation manner, the method for calculating the analysis efficiency includes:
wherein m is 1 (SO 2 ) The releasable sulfur dioxide mass m of the current unit mass of activated carbon after high temperature desorption 2 (SO 2 ) The mass of sulfur dioxide adsorbed by unit mass of activated carbon when entering the desorption tower.
With reference to the first aspect, in an implementation manner, determining whether the current actual parsing efficiency is equal to a preset target parsing efficiency, and then further including:
if the current actual analysis efficiency is not equal to the target analysis efficiency, judging whether the current actual analysis efficiency is smaller than a preset target analysis efficiency;
if the current actual analysis efficiency is smaller than the preset target analysis efficiency, acquiring the current analysis temperature of the analysis tower;
according to the current analysis temperature and a preset analysis temperature adjustment table, increasing a temperature adjustment amplitude to obtain a first analysis temperature of the analysis tower;
after a first preset period, acquiring first actual analysis efficiency corresponding to the first analysis temperature;
judging whether the first actual analysis efficiency is greater than or equal to the target analysis efficiency; if not, continuing to increase the current analysis temperature, and executing a plurality of cycles in a circulating manner until the actual analysis efficiency corresponding to the adjusted analysis temperature is greater than or equal to the target analysis efficiency, wherein the analysis temperature of the last adjustment cycle is the optimal analysis temperature.
With reference to the first aspect, in an implementation manner, determining whether the current actual analysis efficiency is smaller than a preset target analysis efficiency, and then further includes:
and if the current actual analysis efficiency is greater than the preset target analysis efficiency, acquiring the current analysis temperature of the analysis tower.
And reducing the temperature adjustment amplitude according to the current analysis temperature and a preset analysis temperature adjustment table to obtain a second analysis temperature of the analysis tower.
And after a second preset period, acquiring a second actual analysis efficiency corresponding to the first analysis temperature.
Judging whether the second actual analysis efficiency is less than or equal to the target analysis efficiency; if not, continuing to reduce the current analysis temperature, and executing a plurality of cycles in a circulating manner until the actual analysis efficiency corresponding to the adjusted analysis temperature is less than or equal to the target analysis efficiency, wherein the analysis temperature of the last adjustment cycle is the optimal analysis temperature.
In a second aspect, an embodiment of the present application provides a method for controlling a temperature of a desorption tower, where the method for controlling a temperature includes:
acquiring parameters for calculating the analysis efficiency, and calculating the current actual analysis efficiency;
judging whether the current actual analysis efficiency is equal to a preset target analysis efficiency or not;
if the current actual analysis efficiency is not equal to the target analysis efficiency, adjusting the analysis temperature according to the current analysis temperature and a preset analysis temperature adjustment table until the actual analysis efficiency corresponding to the adjusted analysis temperature is equal to the target analysis efficiency, wherein the adjusted analysis temperature is the optimal analysis temperature.
With reference to the second aspect, in an implementation manner, determining whether the current actual parsing efficiency is equal to a preset target parsing efficiency, and then further including:
if the current actual analysis efficiency is not equal to the target analysis efficiency, judging whether the current actual analysis efficiency is smaller than a preset target analysis efficiency;
if the current actual analysis efficiency is smaller than the preset target analysis efficiency, acquiring the current analysis temperature of the analysis tower;
according to the current analysis temperature and a preset analysis temperature adjustment table, increasing a temperature adjustment amplitude to obtain a first analysis temperature of the analysis tower;
after a first preset period, acquiring first actual analysis efficiency corresponding to the first analysis temperature;
judging whether the first actual analysis efficiency is greater than or equal to the target analysis efficiency; if not, continuing to increase the current analysis temperature, and executing a plurality of cycles in a circulating manner until the actual analysis efficiency corresponding to the adjusted analysis temperature is greater than or equal to the target analysis efficiency, wherein the analysis temperature of the last adjustment cycle is the optimal analysis temperature.
With reference to the second aspect, in an implementation manner, determining whether the current actual analysis efficiency is smaller than a preset target analysis efficiency, and then further includes:
and if the current actual analysis efficiency is greater than the preset target analysis efficiency, acquiring the current analysis temperature of the analysis tower.
And reducing the temperature adjustment amplitude according to the current analysis temperature and a preset analysis temperature adjustment table to obtain a second analysis temperature of the analysis tower.
And after a second preset period, acquiring a second actual analysis efficiency corresponding to the second analysis temperature.
Judging whether the second actual analysis efficiency is less than or equal to the target analysis efficiency; if not, continuing to reduce the current analysis temperature, and executing a plurality of cycles in a circulating manner until the actual analysis efficiency corresponding to the adjusted analysis temperature is less than or equal to the target analysis efficiency, wherein the analysis temperature of the last adjustment cycle is the optimal analysis temperature.
In a third aspect, an embodiment of the present application provides a temperature control apparatus for a desorption tower, the temperature control apparatus including:
the current actual analysis efficiency acquisition module is used for calculating the current actual analysis efficiency according to the parameter for calculating the analysis efficiency;
the judging module is used for judging whether the current actual analysis efficiency is equal to a preset target analysis efficiency or not;
and the optimal analysis temperature acquisition module is used for adjusting the analysis temperature according to the current analysis temperature and a preset analysis temperature adjustment table when the current actual analysis efficiency is not equal to the target analysis efficiency until the actual analysis efficiency corresponding to the adjusted analysis temperature is equal to the target analysis efficiency, and the adjusted analysis temperature is the optimal analysis temperature.
With reference to the third aspect, in an implementation manner, the temperature control device further includes:
the first judging module is used for judging whether the current actual analysis efficiency is smaller than the preset target analysis efficiency or not when the current actual analysis efficiency is not equal to the target analysis efficiency;
the first current analysis temperature acquisition module is used for acquiring the current analysis temperature of the analysis tower when the current actual analysis efficiency is smaller than the preset target analysis efficiency;
the first analysis temperature acquisition module is used for increasing a temperature adjustment amplitude according to the current analysis temperature and a preset analysis temperature adjustment table to obtain a first analysis temperature of the analysis tower;
the first actual analysis efficiency acquisition module is used for acquiring first actual analysis efficiency corresponding to the first analysis temperature after a first preset period;
a first loop module, configured to determine whether the first actual analysis efficiency is greater than or equal to the target analysis efficiency; if not, continuing to increase the current analysis temperature, and executing a plurality of cycles in a circulating manner until the actual analysis efficiency corresponding to the adjusted analysis temperature is greater than or equal to the target analysis efficiency, wherein the analysis temperature of the last adjustment cycle is the optimal analysis temperature.
With reference to the third aspect, in one implementation manner, the temperature control device further includes:
and the second judging module is used for acquiring the current analysis temperature of the analysis tower when the current actual analysis efficiency is greater than the preset target analysis efficiency.
And the second current analysis temperature acquisition module is used for reducing the temperature adjustment amplitude according to the current analysis temperature and a preset analysis temperature adjustment table to obtain a second analysis temperature of the analysis tower.
And the second actual analysis efficiency obtaining module is used for obtaining a second actual analysis efficiency corresponding to the second analysis temperature after a second preset period.
A second loop module, configured to determine whether the second actual analysis efficiency is less than or equal to the target analysis efficiency; if not, continuing to reduce the current analysis temperature, and executing a plurality of cycles in a circulating manner until the actual analysis efficiency corresponding to the adjusted analysis temperature is less than or equal to the target analysis efficiency, wherein the analysis temperature in the last adjustment cycle is the optimal analysis temperature.
The application discloses temperature control system, method and device of analytic tower, the system includes analytic tower and control end, and the analytic tower is connected the hot-blast furnace and is heated it, and analytic tower bottom is provided with detection device, and wherein, the control end is configured to carry out following step: firstly, calculating the current actual analysis efficiency according to the parameters for calculating the analysis efficiency measured by the detection device; then judging whether the current actual analysis efficiency is equal to a preset target analysis efficiency or not; and if the current actual analysis efficiency is not equal to the target analysis efficiency, adjusting the temperature of the hot blast stove according to an analysis temperature adjustment table until the actual analysis efficiency corresponding to the adjusted analysis temperature is equal to the target analysis efficiency, wherein the adjusted analysis temperature is the optimal analysis temperature. By adopting the scheme, the optimal analytic temperature can be found according to the actual analytic efficiency, so that the operation energy consumption of the analytic tower is the lowest on the premise of meeting the target analytic efficiency, the resources are saved, and the operation cost of the system is reduced.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an activated carbon desulfurization and denitrification system provided by the prior art;
fig. 2 is a schematic structural diagram of a temperature control system of a desorption tower according to an embodiment of the present application;
fig. 3 is a schematic flowchart illustrating steps executed by a control end in a temperature control system of a desorption tower according to an embodiment of the present disclosure;
FIG. 4 is a schematic flow chart diagram of a first embodiment provided herein;
FIG. 5 is a graph showing the analytical efficiency with time at different temperatures.
Fig. 6 is a flowchart of a temperature control method for a desorption tower according to an embodiment of the present application;
FIG. 7 is a schematic flow chart diagram of a second embodiment provided herein;
fig. 8 is a schematic structural diagram of a temperature control device of a desorption tower according to an embodiment of the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.
In order to save resources to the maximum extent and reduce the operation cost of the system, the application provides a temperature control system of an analytic tower, which can adjust the analytic temperature according to the actual analytic efficiency of the analytic tower, and further find the optimal analytic temperature, wherein the optimal analytic temperature is the analytic temperature which enables the operation energy consumption of the analytic tower to be the lowest on the premise that the analytic tower meets the target value of the system analytic efficiency.
Referring to fig. 2, fig. 2 shows a block diagram of a temperature control system of a desorption tower, the temperature control system comprising: an analysis tower 2 and a control end C.
The control terminal C may be a system control center, or may be a terminal device, such as a computer.
The upper part of the analysis tower 2 is provided with a heating section 201, the lower part of the heating section 201 is provided with a heating gas inlet 2011, and the heating gas inlet 2011 is connected to an air outlet 601 of the hot blast stove 6; a temperature sensor 7 is arranged at a pipeline close to a heating gas inlet 2011 of the desorption tower 2; the bottom of the desorption tower 2 is provided with a detection device 8, and the detection device 8 is arranged between the second star-shaped ash discharge valve X2 and the activated carbon vibrating screen 5.
The control terminal C is configured to perform the steps disclosed in fig. 3, including:
and step S11, calculating the current actual analysis efficiency according to the parameters used for calculating the analysis efficiency and measured by the detection device 8.
The detection device 8 obtains the activated carbon sample after high-temperature analysis, and then calculates the current actual analysis efficiency of the analysis tower through assay analysis processing.
And S12, judging whether the current actual analysis efficiency is equal to a preset target analysis efficiency.
Wherein, the analysis efficiency eta j The method is characterized in that after the active carbon with unit mass adsorbs sulfur dioxide, the mass of the sulfur dioxide is analyzed at high temperature to account for the ratio of the adsorbed sulfur dioxide, and the analysis efficiency is calculated by the following steps:
wherein m is 1 (SO 2 ) For the sulfur dioxide mass, unit, that is still releasable for the present unit mass of activated carbon after high temperature desorption: g; m is 2 (SO 2 ) When the sulfur dioxide enters the desorption tower 2, the mass of sulfur dioxide adsorbed by the activated carbon per unit mass is as follows: g; the unit mass of the activated carbon is generally 300g to 1000g, preferably 500g.
The target analysis efficiency can theoretically reach 100%, and in the present application and all the embodiments described below, the target analysis efficiency can be set to be within a threshold range.
And S13, if the current actual analysis efficiency is not equal to the target analysis efficiency, adjusting the temperature of the hot blast stove 6 until the actual analysis efficiency corresponding to the adjusted analysis temperature is equal to the target analysis efficiency, wherein the adjusted analysis temperature is the optimal analysis temperature.
Wherein adjusting the temperature of the hot blast stove 6 comprises the following processes:
acquiring the current analysis temperature of the analysis tower 2, wherein the current analysis temperature is measured by a temperature sensor 7;
and adjusting the air outlet temperature of the hot blast stove 6 according to the current analysis temperature and a preset analysis temperature adjusting table.
The analysis temperature adjustment table adjusts the analysis temperature according to the temperature range, that is, the adjustment amplitude of the analysis temperature in different temperature ranges is different, for example, table 1, where table 1 lists an analysis temperature adjustment table:
TABLE 1
| Analytic temperature T | Adjusting amplitude Δ T |
| 390<T≤400 |
3℃ |
| 400<T≤410℃ | 2℃ |
| 410<T≤420℃ | 1℃ |
| 420<T≤430℃ | 1℃ |
| 430<T≤440℃ | 2℃ |
| 440<T≤450 |
3℃ |
In this step, when the current actual analysis efficiency is not equal to the target analysis efficiency, the temperature of the hot blast stove 6 is adjusted according to the current analysis temperature measured by the temperature sensor 7 and a preset analysis temperature adjustment table, the analysis temperature is adjusted by adjusting the temperature of the hot blast stove 6 until the actual analysis efficiency corresponding to the adjusted analysis temperature is equal to the target analysis efficiency, the adjustment is stopped, the adjusted analysis temperature is the optimal analysis temperature, and at this time, the analysis tower 2 is controlled to operate at the optimal analysis temperature.
And S14, if the current actual analysis efficiency is equal to the target analysis efficiency, the current analysis temperature is the optimal analysis temperature, and the analysis tower 2 is controlled to keep the current analysis temperature to operate.
The application provides a pair of temperature control system of analytic tower, the system includes analytic tower 2 and control end C, and analytic tower 2 is connected hot-blast furnace 6 and is heated it, and analytic tower 2 bottoms are provided with detection device 8, and wherein, control end C is configured to carry out following step: firstly, calculating the current actual analysis efficiency according to the parameters for calculating the analysis efficiency measured by the detection device 8; then judging whether the current actual analysis efficiency is equal to a preset target analysis efficiency or not; if the current actual analysis efficiency is not equal to the target analysis efficiency, the temperature of the hot blast stove 6 is adjusted according to an analysis temperature adjusting table until the actual analysis efficiency corresponding to the adjusted analysis temperature is equal to the target analysis efficiency, and the adjusted analysis temperature is the optimal analysis temperature. By adopting the scheme, the optimal analysis temperature can be found according to the actual analysis efficiency, so that the operation energy consumption of the analysis tower 2 is the lowest on the premise of meeting the target analysis efficiency, the resources are saved, and the operation cost of the system is reduced.
In order to further improve the accuracy of the temperature control system of the analysis tower, the embodiment of the application further discloses a specific heating structure of the analysis tower 2 and a specific adjusting method of the outlet air temperature (i.e. the analysis temperature) of the hot blast stove 6 when the analysis tower 2 is heated by adopting the structure. Referring to fig. 2, the upper part of the heating section 201 is provided with a heated gas outlet 2012, the heated gas outlet 2012 is connected to the gas inlet 602 of the hot blast stove 6 through a heated air circulation fan 9, and a valve is arranged at the outlet of the heated air circulation fan 9.
Wherein, the heated air circulation of analysis tower 2 is formed between hot-blast furnace 6, analysis tower 2, heating section 201 and heated air circulation fan 9, air outlet 601 of hot-blast furnace 6 is connected to the heating gas entry 2011 of heating section 201, the activated carbon in analysis tower 2 is heated and is analyzed, gas after the heat exchange is sent to heated air circulation fan 9 from heating gas export 2012, through heated air circulation fan 9 exit linkage to hot-blast furnace 6, make hot-blast circulated utilization, heated air fan 9 exit is equipped with the valve, with the flow of control circulating hot-blast.
The lower part of the heating section 201 is sequentially provided with a transition section 202 and a heat exchange cooling section 203, the lower part of the transition section 202 is provided with an SRG gas outlet 2021 and is connected to an acid making system 4, the lower part of the heat exchange cooling section 203 is provided with a heat exchange cooling gas inlet 2031, and the heat exchange cooling gas inlet 2031 is connected with a cooling fan.
Wherein, SRG is gaseous to be discharged from changeover portion 202 and is sent to acid making system 4 and make sour, and the effect of heat transfer cooling section 203 is to cool off the active carbon after the analysis, utilizes cooling blower suction air, and cooling air sends the heat transfer cooling section 203 of analysis tower 2 to through heat transfer cooling gas entry 2031, carries out indirect heat transfer through cooling air and active carbon, cools off the active carbon.
Adopt aforementioned structure adjustment the air-out temperature of hot-blast furnace 6, including two kinds of circumstances: the first is to increase the air outlet temperature of the hot blast stove 6, and the second is to decrease the air outlet temperature of the hot blast stove 6, and the specific adjustment method is as follows:
and if the current actual analysis efficiency is smaller than the target analysis efficiency, increasing the gas flow and the corresponding air flow of the hot blast stove 6 so as to increase the air outlet temperature of the hot blast stove 6, or increasing the valve opening degree of a hot air circulating fan 9, increasing the circulating hot air quantity of the hot air circulating fan 9 and further increasing the air outlet temperature of the hot blast stove 6.
If the current actual analysis efficiency is greater than the target analysis efficiency, the gas flow of the hot blast stove 6 is reduced to reduce the air outlet temperature of the hot blast stove 6, or the valve opening degree of the hot air circulating fan 9 is reduced, and the air outlet temperature of the hot blast stove 6 is further reduced.
Based on the temperature control system of the analytic tower 2 disclosed in fig. 2, a first embodiment of the present application discloses specific steps of controlling the analytic tower 2 to obtain an optimal analytic temperature by a control terminal C, and with reference to fig. 4, the steps include:
and step S21, calculating the current actual analysis efficiency according to the parameter for calculating the analysis efficiency measured by the detection device 8.
In this step, the detection device 8 may obtain the activated carbon sample after the high-temperature analysis of the analysis tower, and then the current actual analysis efficiency of the analysis tower is calculated through chemical examination analysis processing.
And S22, judging whether the current actual analysis efficiency is equal to a preset target analysis efficiency.
The principle of step S21 is the same as that of step S11, and the principle of step S22 is the same as that of step S12, and please refer to the related description for details.
And S23, if the current actual analysis efficiency is equal to the target analysis efficiency, the current analysis temperature is the optimal analysis temperature.
Step S24, if the current actual analysis efficiency is not equal to the target analysis efficiency, judging whether the current actual analysis efficiency is smaller than a preset target analysis efficiency.
At this time, when the current actual analysis efficiency does not accord with the target analysis efficiency, two situations are distinguished, one is that the current actual analysis efficiency is smaller than the preset target analysis efficiency; the current actual analysis efficiency is larger than the preset target analysis efficiency; when the current actual analysis efficiency is smaller than the preset target analysis efficiency, executing the following steps:
in step S240, the current analysis temperature of the analysis tower 2 is obtained.
In this step, the current analyzing temperature of the analyzing tower 2 is a real-time temperature, which can be represented as T 1 。
And step S241, increasing a temperature adjustment amplitude according to the current analysis temperature and a preset analysis temperature adjustment table to obtain a first analysis temperature of the analysis tower 2.
In this step, the temperature adjustment amplitude is increased by the hot-blast stove 6, that is, the corresponding temperature adjustment amplitude is determined according to the current analysis temperature and a preset analysis temperature adjustment table, and then the hot-blast stove is used to increase the corresponding outlet air temperature.
Step S242, after a first preset period, obtaining a first actual analysis efficiency corresponding to the first analysis temperature.
Step S243, determining whether the first actual analysis efficiency is greater than or equal to the target analysis efficiency; if yes, go to step S244, otherwise, go back to step S240 again, and loop through multiple cycles.
In step S244, the analysis temperature of the last adjustment period is the optimal analysis temperature.
In this embodiment, since the actual analysis efficiency is smaller than the preset target analysis efficiency, T is 1 The value needs to be increased to improve the analysis efficiency, firstly, the current temperature value T is used 1 Increasing the corresponding adjusting amplitude value delta T1, then judging whether the actual analysis efficiency reaches the target analysis efficiency after a first preset period time, and if not, increasing the amplitude value delta T1 according to the increased amplitude value delta T 1 Adding corresponding adjusting amplitude value delta T2 according to the temperature value range of the + delta T1, judging whether the actual analysis efficiency reaches the target analysis efficiency again after the first preset period time, and circulating until the measured efficiency value reaches or exceeds the target analysis efficiency, and increasing the T after the time 1 The + Δ T1+ Δ T2+. + Δ Tn value is used as the optimum analysis temperature of the system.
When the current actual analysis efficiency is greater than the preset target analysis efficiency, executing the following steps:
in step S245, the current analysis temperature of the analysis tower 2 is acquired.
In step S246, the temperature adjustment amplitude is reduced according to the current analysis temperature and the preset analysis temperature adjustment table, so as to obtain the second analysis temperature of the analysis tower 2.
In this step, the temperature adjustment amplitude is reduced by the hot blast stove 6, that is, the corresponding temperature adjustment amplitude is determined according to the current analytic temperature and the preset analytic temperature adjustment table, and then the hot blast stove 6 is utilized to reduce the corresponding outlet air temperature.
Step S247, after a second preset period, obtaining a second actual analytic efficiency corresponding to the second analytic temperature.
Step S248, determining whether the second actual analysis efficiency is less than or equal to the target analysis efficiency; if so, go to step S249, otherwise, go back to step S245 again, and cycle through multiple cycles.
In step S249, the analysis temperature in the previous adjustment period is the optimal analysis temperature.
In this embodiment, since the actual analysis efficiency is greater than the preset target analysis efficiency, T is 1 The value needs to be small, so that the resources can be saved on the premise of keeping high efficiency, and firstly, the current temperature value T is used 1 To reduce the corresponding adjustment amplitude Δ T1, and then determining whether the analysis efficiency measured value is greater than the efficiency target value after a second preset period time, if not, determining the T at the initial time 1 The value is the optimum analytic temperature value, if yes, T after reduction 1 Continuing to reduce the corresponding adjustment range Δ T2 at the Δ T1 value, determining whether the analysis efficiency measured value is greater than the efficiency target value after a second predetermined period of time, if so, continuing to reduce the adjustment value Δ T3 at the corresponding range, and repeating the above steps until the analysis efficiency measured value is less than the target analysis efficiency value, at which time, the optimal analysis temperature is the temperature value of the previous adjustment period, i.e. T 1 - Δ T1- Δ T2-. - Δ T (n-1) as the optimum resolution temperature of the system.
In the first embodiment, the first preset period and the second preset period are the heating desorption time of the activated carbon in the desorption tower 2, and the calculation process is as follows:
in the actual operation process of the activated carbon desulfurization and denitrification system, in order to meet the requirement of material balance of the system, the material circulation amount of the activated carbon is basically determined by the amount of sintering flue gas entering an adsorption tower and SO in the flue gas 2 And NO X The feed rate of the analytical tower 2 can be determined from the material circulation amount, and the heating analysis time of the activated carbon can be determined from the volume structure of the heating zone 201 of the analytical tower 2 and the feed rate, and the heating analysis time is calculated as follows:
wherein, t 1 The heating desorption time of the activated carbon is unit: min; s 1 Is the cross-sectional area of the heating section 201, in units: m is 2 ；L 1 Is a heating sectionHeight of 201, unit: m; ρ is the density of the activated carbon, unit: t/m 3 ；v 1 The unit of the blanking speed of the desorption tower 2 is: t/h.
From the experimental results, it was found that the higher the analysis temperature, the higher the analysis efficiency in the same heating time, but when the analysis temperature exceeds the threshold, the analysis efficiency does not increase any more, that is, in the same analysis temperature, the longer the heating time, the SO of the activated carbon 2 The cleaner the release, the higher the desorption efficiency, which does not increase any more after the heating time exceeds the threshold. Specifically, as shown in FIG. 5, T1, T2 and T3 in FIG. 5 are different analysis temperatures, the horizontal axis S represents analysis time in min, and the vertical axis η j Indicating the analysis efficiency.
Therefore, the setting of the first preset period and the second preset period is: and at the current temperature, the shortest time threshold when the analysis efficiency reaches the maximum is reached.
The application also discloses a temperature control method of the analytic tower, which can be applied to the temperature control system disclosed in fig. 2 and also can be applied to control systems of other structures, and the application is not specifically limited, and as shown in fig. 6, the temperature control method includes:
and step S31, calculating the current actual analysis efficiency according to the parameters for calculating the analysis efficiency.
In this step, the parameter for calculating the analytic efficiency may be obtained from the detection device in fig. 2 through the activated carbon detection sample after the high temperature analysis, and the sample is analyzed by assay to obtain assay analysis data, and the current actual analytic efficiency may be calculated by using the assay analysis data, or may be obtained from other devices capable of obtaining the relevant parameter, which is not specifically limited in this application.
And step S32, judging whether the current actual analysis efficiency is equal to a preset target analysis efficiency.
Step S33, if the current actual analysis efficiency is not equal to the target analysis efficiency, adjusting the analysis temperature according to the current analysis temperature and a preset analysis temperature adjustment table until the actual analysis efficiency corresponding to the adjusted analysis temperature is equal to the target analysis efficiency, wherein the adjusted analysis temperature is the optimal analysis temperature.
Wherein the current analytic temperature is measured by a temperature sensor.
In this step, the method for adjusting the analytic temperature may be implemented by using the hot-blast stove and the hot-circulation fan in fig. 2, or may be implemented by using other structures capable of implementing the analytic temperature of the analytic tower, which is not specifically limited in this application.
And step S34, if the current actual analysis efficiency is equal to the target analysis efficiency, the current analysis temperature is the optimal analysis temperature, and the analysis tower is controlled to keep the current analysis temperature to operate.
In order to more clearly implement the temperature control method of the analytic tower, a second embodiment of the present application discloses specific implementation steps of the temperature control method, and as shown in fig. 7, the method includes:
and S41, calculating the current actual analysis efficiency according to the parameters for calculating the analysis efficiency.
The step can be that the detection device obtains the activated carbon sample after the high-temperature analysis of the analysis tower, and then the current actual analysis efficiency of the analysis tower is calculated through the analysis and processing.
And step S42, judging whether the current actual analysis efficiency is equal to a preset target analysis efficiency.
And S43, if the current actual analysis efficiency is equal to the target analysis efficiency, the current analysis temperature is the optimal analysis temperature.
Step S44, if the current actual analysis efficiency is not equal to the target analysis efficiency, determining whether the current actual analysis efficiency is less than a preset target analysis efficiency.
At this time, when the previous actual analysis efficiency does not accord with the target analysis efficiency, the two conditions are divided, wherein one condition is that the current actual analysis efficiency is smaller than the preset target analysis efficiency; the current actual analysis efficiency is larger than the preset target analysis efficiency; when the current actual analysis efficiency is smaller than the preset target analysis efficiency, executing the following steps:
and step S440, acquiring the current analysis temperature of the analysis tower.
Step S441, a temperature adjustment amplitude is increased according to the current analysis temperature and a preset analysis temperature adjustment table, so as to obtain a first analysis temperature of the analysis tower.
Step S442, after a first preset period, obtaining a first actual analysis efficiency corresponding to the first analysis temperature.
Step S443, determining whether the first actual analysis efficiency is greater than or equal to the target analysis efficiency; if yes, go to step S444, otherwise, go back to step S440 again, and loop through multiple cycles.
In step S444, the analysis temperature of the last adjustment period is the optimal analysis temperature.
When the current actual analysis efficiency is greater than the preset target analysis efficiency, executing the following steps:
in step S445, the current analysis temperature of the analysis tower is obtained.
Step S446, the temperature adjustment amplitude is reduced according to the current analysis temperature and a preset analysis temperature adjustment table, so as to obtain a second analysis temperature of the analysis tower.
Step S447, after a second preset period, obtaining a second actual analytic efficiency corresponding to the second analytic temperature.
Step S448, determining whether the second actual parsing efficiency is less than or equal to the target parsing efficiency; if yes, go to step S449, otherwise, go back to step S445 again, and execute a plurality of cycles in a loop.
In step S449, the analysis temperature of the previous adjustment period is the optimal analysis temperature.
The principle of the temperature control method disclosed in the second embodiment of the present application is similar to that in the first embodiment, and reference may be made to the specific details of the first embodiment, which will not be described herein too much.
The following are embodiments of the apparatus of the present invention that may be used to perform embodiments of the method of the present invention. For details which are not disclosed in the embodiments of the apparatus of the present invention, reference is made to the embodiments of the method of the present invention.
Referring to fig. 8, fig. 8 shows a temperature control device of a desorption tower, which may be disposed at a control end of the temperature control system of fig. 2 as an implementation manner, and the temperature control device includes:
a current actual analysis efficiency obtaining module 100, configured to calculate a current actual analysis efficiency according to the parameter for calculating the analysis efficiency.
A determining module 200, configured to determine whether the current actual analysis efficiency is equal to a preset target analysis efficiency.
An optimal analysis temperature obtaining module 300, configured to adjust the analysis temperature according to the current analysis temperature and a preset analysis temperature adjustment table when the current actual analysis efficiency is not equal to the target analysis efficiency, until the actual analysis efficiency corresponding to the adjusted analysis temperature is equal to the target analysis efficiency, where the adjusted analysis temperature is the optimal analysis temperature.
Further, in one implementation, the temperature control apparatus further includes:
the first judging module is used for judging whether the current actual analysis efficiency is smaller than the preset target analysis efficiency or not when the current actual analysis efficiency is not equal to the target analysis efficiency;
the first current analysis temperature acquisition module is used for acquiring the current analysis temperature of the analysis tower when the current actual analysis efficiency is smaller than the preset target analysis efficiency;
the first analysis temperature acquisition module is used for increasing a temperature adjustment amplitude according to the current analysis temperature and a preset analysis temperature adjustment table to obtain a first analysis temperature of the analysis tower;
the first actual analysis efficiency acquisition module is used for acquiring first actual analysis efficiency corresponding to the first analysis temperature after a first preset period;
a first loop module, configured to determine whether the first actual analysis efficiency is greater than or equal to the target analysis efficiency; if not, continuing to increase the current analysis temperature, and executing a plurality of cycles in a circulating manner until the actual analysis efficiency corresponding to the adjusted analysis temperature is greater than or equal to the target analysis efficiency, wherein the analysis temperature of the last adjustment cycle is the optimal analysis temperature.
Further, in one implementation, the temperature control apparatus further includes:
and the second judging module is used for acquiring the current analysis temperature of the analysis tower when the current actual analysis efficiency is greater than the preset target analysis efficiency.
And the second current analysis temperature acquisition module is used for reducing the temperature of the hot blast stove according to the current analysis temperature and a preset analysis temperature adjustment table to obtain a second analysis temperature of the analysis tower.
And the second actual analysis efficiency obtaining module is used for obtaining a second actual analysis efficiency corresponding to the second analysis temperature after a second preset period.
A second loop module, configured to determine whether the second actual parsing efficiency is less than or equal to the target parsing efficiency; if not, continuing to reduce the current analysis temperature, and executing a plurality of cycles in a circulating manner until the actual analysis efficiency corresponding to the adjusted analysis temperature is less than or equal to the target analysis efficiency, wherein the analysis temperature of the last adjustment cycle is the optimal analysis temperature.
The same and similar parts in the various embodiments in this specification may be referred to each other. In particular, as for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is simple, and the relevant points can be referred to the description in the method embodiment.
The present application has been described in detail with reference to particular embodiments and illustrative examples, but the description is not intended to be construed as limiting the application. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the presently disclosed embodiments and implementations thereof without departing from the spirit and scope of the present disclosure, and these fall within the scope of the present disclosure. The protection scope of this application is subject to the appended claims.
Claims (9)
1. A temperature control system for a resolution tower, comprising: an analysis tower (2) and a control end;
the upper part of the analysis tower (2) is a heating section (201), the lower part of the heating section (201) is provided with a heating gas inlet (2011), and the heating gas inlet (2011) is connected to an air outlet (601) of the hot blast stove (6); a temperature sensor (7) is arranged at a pipeline close to a heating gas inlet (2011) of the desorption tower (2); a detection device (8) is arranged at the bottom of the desorption tower (2), and the detection device (8) is arranged between the second star-shaped ash discharge valve and the activated carbon vibrating screen; wherein:
the control terminal is configured to perform the following steps:
calculating the current actual analysis efficiency according to the parameters for calculating the analysis efficiency measured by the detection device (8); the analysis efficiency calculation method comprises the following steps:
m 1 (SO 2 ) The releasable sulfur dioxide mass m of the current unit mass of activated carbon after high temperature desorption 2 (SO 2 ) The mass of sulfur dioxide adsorbed by unit mass of active carbon when entering the desorption tower;
judging whether the current actual analysis efficiency is equal to a preset target analysis efficiency or not;
if the current actual analysis efficiency is not equal to the target analysis efficiency, adjusting the temperature of the hot blast stove (6) until the actual analysis efficiency corresponding to the adjusted analysis temperature is equal to the target analysis efficiency, wherein the adjusted analysis temperature is the optimal analysis temperature;
wherein adjusting the temperature of the hot blast stove (6) comprises:
acquiring the current resolving temperature of the resolving tower (2), wherein the current resolving temperature is measured by a temperature sensor (7);
and adjusting the air outlet temperature of the hot blast stove (6) according to the current analysis temperature and a preset analysis temperature adjusting table.
2. The temperature control system of claim 1,
the upper part of the heating section (201) is provided with a heating gas outlet (2012), the heating gas outlet (2012) is connected to a gas inlet (602) of the hot blast stove (6) through a hot air circulating fan (9), and a valve is arranged at the outlet of the hot air circulating fan (9);
the lower part of the heating section (201) is sequentially provided with a transition section (202) and a heat exchange cooling section (203), the lower part of the transition section (202) is provided with an SRG gas outlet (2021) and is connected to an acid making system, the lower part of the heat exchange cooling section (203) is provided with a heat exchange cooling gas inlet (2031), and the heat exchange cooling gas inlet (2031) is connected with a cooling fan;
adjusting the air outlet temperature of the hot blast stove (6), comprising:
and if the current actual analysis efficiency is smaller than the target analysis efficiency, increasing the gas flow of the hot blast stove (6) and the corresponding air flow so as to increase the air outlet temperature of the hot blast stove (6), or increasing the valve opening degree of a hot air circulating fan, increasing the circulating hot air quantity of a hot air circulating fan (9), and further increasing the air outlet temperature of the hot blast stove (6).
3. The temperature control system according to claim 2, wherein adjusting the outlet air temperature of the hot blast stove (6) further comprises:
if the current actual analysis efficiency is larger than the target analysis efficiency, reducing the gas flow of the hot blast stove (6) so as to reduce the air outlet temperature of the hot blast stove (6), or reducing the valve opening degree of the hot air circulating fan (9) so as to reduce the air outlet temperature of the hot blast stove (6).
4. The system according to claim 1, wherein determining whether the current actual analysis efficiency is equal to a preset target analysis efficiency further comprises:
if the current actual analysis efficiency is not equal to the target analysis efficiency, judging whether the current actual analysis efficiency is smaller than a preset target analysis efficiency;
if the current actual analysis efficiency is smaller than the preset target analysis efficiency, acquiring the current analysis temperature of the analysis tower (2);
according to the current analysis temperature and a preset analysis temperature adjustment table, increasing a temperature adjustment amplitude to obtain a first analysis temperature of the analysis tower (2);
after a first preset period, acquiring first actual analysis efficiency corresponding to the first analysis temperature;
judging whether the first actual analysis efficiency is greater than or equal to the target analysis efficiency; if not, continuing to increase the current analysis temperature, and executing a plurality of cycles in a circulating manner until the actual analysis efficiency corresponding to the adjusted analysis temperature is equal to the target analysis efficiency, wherein the analysis temperature of the last adjustment cycle is the optimal analysis temperature.
5. The temperature control system of claim 4, wherein determining whether the current actual analysis efficiency is less than a preset target analysis efficiency further comprises:
if the current actual analysis efficiency is larger than the preset target analysis efficiency, acquiring the current analysis temperature of the analysis tower (2);
according to the current analysis temperature and a preset analysis temperature adjustment table, reducing the temperature adjustment amplitude to obtain a second analysis temperature of the analysis tower (2);
after a second preset period, acquiring a second actual analysis efficiency corresponding to the second analysis temperature;
judging whether the second actual analysis efficiency is less than or equal to the target analysis efficiency; if not, continuing to reduce the current analysis temperature, and executing a plurality of cycles in a circulating manner until the actual analysis efficiency corresponding to the adjusted analysis temperature is equal to the target analysis efficiency, wherein the analysis temperature of the last adjustment cycle is the optimal analysis temperature.
6. A method for controlling the temperature of a desorption column, comprising:
acquiring parameters for calculating the analysis efficiency, and calculating the current actual analysis efficiency;
the analysis efficiency calculation method comprises the following steps:
m 1 (SO 2 ) The releasable sulfur dioxide mass m of the current unit mass of activated carbon after high temperature desorption 2 (SO 2 ) The mass of sulfur dioxide adsorbed by unit mass of active carbon when entering the desorption tower;
judging whether the current actual analysis efficiency is equal to a preset target analysis efficiency or not;
if the current actual analysis efficiency is not equal to the target analysis efficiency, adjusting the analysis temperature according to the current analysis temperature and a preset analysis temperature adjustment table until the actual analysis efficiency corresponding to the adjusted analysis temperature is equal to the target analysis efficiency, wherein the adjusted analysis temperature is the optimal analysis temperature.
7. The method of claim 6, wherein determining whether the current actual analysis efficiency is equal to a preset target analysis efficiency further comprises:
if the current actual analysis efficiency is not equal to the target analysis efficiency, judging whether the current actual analysis efficiency is smaller than a preset target analysis efficiency;
if the current actual analysis efficiency is smaller than the preset target analysis efficiency, acquiring the current analysis temperature of the analysis tower;
according to the current analysis temperature and a preset analysis temperature adjustment table, increasing a temperature adjustment amplitude to obtain a first analysis temperature of the analysis tower;
after a first preset period, acquiring first actual analysis efficiency corresponding to the first analysis temperature;
judging whether the first actual analysis efficiency is greater than or equal to the target analysis efficiency; if not, continuing to increase the current analysis temperature, and executing a plurality of cycles in a circulating manner until the actual analysis efficiency corresponding to the adjusted analysis temperature is equal to the target analysis efficiency, wherein the analysis temperature of the last adjustment cycle is the optimal analysis temperature.
8. The temperature control method according to claim 6, wherein determining whether the current actual analysis efficiency is smaller than a preset target analysis efficiency further comprises:
if the current actual analysis efficiency is larger than the preset target analysis efficiency, acquiring the current analysis temperature of the analysis tower;
according to the current analysis temperature and a preset analysis temperature adjustment table, reducing the temperature adjustment amplitude to obtain a second analysis temperature of the analysis tower;
after a second preset period, obtaining a second actual analysis efficiency corresponding to the second analysis temperature;
judging whether the second actual analysis efficiency is less than or equal to the target analysis efficiency; if not, continuing to reduce the current analysis temperature, and executing a plurality of cycles in a circulating manner until the actual analysis efficiency corresponding to the adjusted analysis temperature is equal to the target analysis efficiency, wherein the analysis temperature of the last adjustment cycle is the optimal analysis temperature.
9. A temperature control device for a desorption column, the temperature control device comprising:
the current actual analysis efficiency acquisition module is used for calculating the current actual analysis efficiency according to the parameter for calculating the analysis efficiency;
the judging module is used for judging whether the current actual analysis efficiency is equal to a preset target analysis efficiency or not; the analysis efficiency calculation method comprises the following steps:
m 1 (SO 2 ) The releasable sulfur dioxide mass m of the current unit mass of activated carbon after high temperature desorption 2 (SO 2 ) The mass of sulfur dioxide adsorbed by unit mass of active carbon when entering the desorption tower;
and the optimal analysis temperature acquisition module is used for adjusting the analysis temperature according to the current analysis temperature and a preset analysis temperature adjustment table when the current actual analysis efficiency is not equal to the target analysis efficiency until the actual analysis efficiency corresponding to the adjusted analysis temperature is equal to the target analysis efficiency, and the adjusted analysis temperature is the optimal analysis temperature.
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