CN108295621A - A kind of multi-process flue gas purification system and its control method - Google Patents
A kind of multi-process flue gas purification system and its control method Download PDFInfo
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- CN108295621A CN108295621A CN201810084374.4A CN201810084374A CN108295621A CN 108295621 A CN108295621 A CN 108295621A CN 201810084374 A CN201810084374 A CN 201810084374A CN 108295621 A CN108295621 A CN 108295621A
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- 238000000034 method Methods 0.000 title claims abstract description 474
- 239000003546 flue gas Substances 0.000 title claims abstract description 420
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 413
- 238000000746 purification Methods 0.000 title claims abstract description 342
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 1360
- 230000004913 activation Effects 0.000 claims abstract description 230
- 230000008569 process Effects 0.000 claims abstract description 218
- 239000000779 smoke Substances 0.000 claims abstract description 12
- 238000004458 analytical method Methods 0.000 claims description 208
- 229910052799 carbon Inorganic materials 0.000 claims description 174
- 238000005245 sintering Methods 0.000 claims description 104
- 239000013589 supplement Substances 0.000 claims description 76
- 238000007599 discharging Methods 0.000 claims description 57
- 238000003795 desorption Methods 0.000 claims description 48
- 229910000831 Steel Inorganic materials 0.000 claims description 35
- 239000010959 steel Substances 0.000 claims description 35
- 230000001502 supplementing effect Effects 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 27
- 238000012216 screening Methods 0.000 claims description 25
- 238000011049 filling Methods 0.000 claims description 18
- 239000003575 carbonaceous material Substances 0.000 claims description 15
- 238000009826 distribution Methods 0.000 claims description 7
- 230000014759 maintenance of location Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 150000001721 carbon Chemical class 0.000 claims description 5
- 244000241872 Lycium chinense Species 0.000 claims description 4
- 235000015468 Lycium chinense Nutrition 0.000 claims description 4
- 238000004886 process control Methods 0.000 abstract description 15
- 238000004064 recycling Methods 0.000 abstract description 6
- 239000012141 concentrate Substances 0.000 abstract description 4
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 239000012190 activator Substances 0.000 abstract 1
- 238000001179 sorption measurement Methods 0.000 description 37
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 20
- 241000196324 Embryophyta Species 0.000 description 13
- 238000004140 cleaning Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 10
- 239000003344 environmental pollutant Substances 0.000 description 9
- 231100000719 pollutant Toxicity 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000003860 storage Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000007873 sieving Methods 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- RJIWZDNTCBHXAL-UHFFFAOYSA-N nitroxoline Chemical compound C1=CN=C2C(O)=CC=C([N+]([O-])=O)C2=C1 RJIWZDNTCBHXAL-UHFFFAOYSA-N 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- HOWHQWFXSLOJEF-MGZLOUMQSA-N systemin Chemical compound NCCCC[C@H](N)C(=O)N[C@@H](CCSC)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CC(O)=O)C(=O)OC(=O)[C@@H]1CCCN1C(=O)[C@H]1N(C(=O)[C@H](CC(O)=O)NC(=O)[C@H](CCCN=C(N)N)NC(=O)[C@H](CCCCN)NC(=O)[C@H](CO)NC(=O)[C@H]2N(CCC2)C(=O)[C@H]2N(CCC2)C(=O)[C@H](CCCCN)NC(=O)[C@H](CO)NC(=O)[C@H](CCC(N)=O)NC(=O)[C@@H](NC(=O)[C@H](C)N)C(C)C)CCC1 HOWHQWFXSLOJEF-MGZLOUMQSA-N 0.000 description 1
- 108010050014 systemin Proteins 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/06—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/06—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
- B01D53/08—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds according to the "moving bed" method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/06—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
- B01D53/10—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds with dispersed adsorbents
- B01D53/12—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds with dispersed adsorbents according to the "fluidised technique"
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
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Abstract
This application discloses a kind of multi-process flue gas purification system and its control methods, parsing activation subsystem is concentrated including activated carbon, and smoke eliminator corresponding with each process, each smoke eliminator concentrates parsing activation subsystem to connect by activated carbon transport subsystem with activated carbon respectively, realizes recycling for activated carbon.The summation for the activated carbon circular flow that main control unit is sent using the corresponding process control unit of all process steps, represent the activated carbon circular flow that activated carbon concentrates parsing activation subsystem, and it controls activator system control unit adjustment activated carbon and concentrates belt conveyer scale in parsing activation subsystem, the given frequency of charging gear and discharge device, so that the activated carbon circular flow and the activated carbon circular flow summation of smoke eliminator in each process at activated carbon concentration parsing activation subsystem are substantially equal, so that the absorbed portion of multi-process flue gas purification system achievees the purpose that synchronous operation with parsing part, improve operational efficiency.
Description
Technical Field
The application relates to the technical field of gas purification, in particular to a multi-process flue gas purification system and a control method thereof.
Background
The iron and steel enterprises are the supporting enterprises of the whole national economy, but the iron and steel enterprises make important contribution to the economic development and are accompanied with the problem of serious atmospheric pollution. Fume emission is generated in a plurality of processes in the steel industry, for example, sintering, pelletizing, coking, ironmaking, steelmaking, steel rolling and the like, and fume emitted in each processThe gas contains a large amount of dust and SO2And NOXAnd the like. After the polluted flue gas is discharged into the atmosphere, the environment is polluted, and the human health is threatened. For this reason, the steel enterprises generally adopt an activated carbon flue gas purification technology, that is, a material (for example, activated carbon) with an adsorption function is placed in a flue gas purification device to adsorb flue gas, so as to realize purification treatment of flue gas discharged by each process.
The active carbon flue gas purification technology of current iron and steel enterprise uses in flue gas purification system, and flue gas purification system is including setting up the flue gas purification device 1 at every process to and several active carbon analytic activation subsystem 2, and every active carbon analytic activation subsystem 2 corresponds the intercommunication with every flue gas purification device 1 through corresponding active carbon conveying subsystem 3 respectively. As shown in fig. 1, the activated carbon flue gas purification device 1 comprises a feeding device 11, an adsorption tower 12, a discharging device 13, a buffer bin 14 and a discharging device 15; the activated carbon desorption activation subsystem 2 comprises a buffer bin 21, a feeding device 22, a desorption tower 23 and a discharging device 24. When the system is operated, the activated carbon enters the adsorption tower 12 from the feeding device 11, an activated carbon material layer is formed in the adsorption tower 12, meanwhile, the raw flue gas 17 containing the pollutants continuously enters the adsorption tower 12, and the pollutants in the raw flue gas 17 are adsorbed by the activated carbon in the adsorption tower 12 to obtain clean flue gas 16 which is discharged outside. The polluted activated carbon adsorbed with pollutants is discharged to a buffer bin 14 through a discharging device 13, then is discharged to an activated carbon conveying subsystem 3 through a discharging device 15 arranged below the buffer bin 14, the polluted activated carbon is conveyed to a corresponding buffer bin 21 of an activated carbon analysis and activation subsystem 2 through the activated carbon conveying subsystem 3, the polluted activated carbon is released into an analysis tower 23 through a feeding device 22 arranged below the buffer bin 21, and clean activated carbon obtained through analysis and activation treatment is discharged through a discharging device 24. The activated carbon delivery subsystem 3 delivers clean activated carbon to the corresponding feeding equipment 11 of the flue gas purification device 1, and the clean activated carbon enters the adsorption tower 12 again to purify flue gas, so that one-to-one flue gas purification treatment and activated carbon recycling of the flue gas purification device 1 and the activated carbon desorption activation subsystem 2 are realized.
In practical application, each flue gas emission process in iron and steel enterprises is provided with a set of flue gas purification device and a set of activated carbon analysis and activation subsystem, and the plurality of flue gas purification devices and the activated carbon analysis and activation subsystems work simultaneously to realize the purification treatment of the polluted flue gas generated by each process. However, since the scale of each process and the amount of flue gas generated are different in a steel enterprise, in order to achieve the best flue gas purification effect, the processes of different scales need to be provided with flue gas purification devices of matching scales, so that the types of flue gas purification devices provided in the steel enterprise are many, and the unified management cannot be performed. And each flue gas purification device is respectively provided with an independent activated carbon analysis and activation subsystem, so that the number of the activated carbon analysis and activation subsystems in the steel enterprise is excessive, the overall structure of the flue gas purification system in the steel enterprise is complex, and the flue gas generated in each process is treated independently, so that the operating efficiency of the flue gas purification system is low. Therefore, how to provide a flue gas purification system capable of efficiently treating flue gas becomes a problem to be solved in the field.
Disclosure of Invention
The application provides a multi-process flue gas purification system and a control method thereof, which aim to solve the problem of low operation efficiency of the existing flue gas purification system.
In a first aspect, the present application provides a multiple process flue gas purification system, comprising: the system comprises an active carbon centralized analysis and activation subsystem, an active carbon conveying subsystem and flue gas purification devices corresponding to all working procedures, wherein each flue gas purification device is respectively connected with the active carbon centralized analysis and activation subsystem through the active carbon conveying subsystem; wherein,
the active carbon centralized analysis and activation subsystem comprises an analysis tower, a feeding device, a discharging device, a screening device, an active carbon bin, a total active carbon bin, a belt scale and a new active carbon supplementing device, wherein the feeding device is used for controlling the flow of the polluted active carbon entering the analysis tower, the discharging device is used for discharging the activated active carbon after activation treatment in the analysis tower, the screening device is used for screening the activated active carbon discharged by the discharging device, the active carbon bin is used for collecting the activated active carbon obtained after the activated active carbon passes through the screening device, the total active carbon bin is arranged between the outlet end of a flue gas purification device corresponding to each process and the feeding device, the total active carbon bin is used for collecting the polluted active carbon discharged by the flue gas purification device in each process, the belt scale is arranged between the total active carbon bin and the feeding device, the belt scale is used for conveying the polluted active carbon in the total active carbon bin to the analysis tower, and the new active carbon supplementing device is arranged, the new active carbon supplementing device is used for supplementing new active carbon into the total active carbon bin.
Optionally, the method further comprises: the flue gas purification device is arranged corresponding to the sintering process of the activated carbon centralized analysis and activation subsystem, and the material distribution device is positioned below the activated carbon bin; the polluted active carbon discharged by the flue gas purification device corresponding to the sintering procedure is sent into the desorption tower through the active carbon conveying subsystem and the feeding device;
the material distributing device comprises a process n discharging device used for distributing activated carbon for each process and a sintering process discharging device used for distributing the activated carbon for the sintering process.
In a second aspect, an embodiment of the present application provides a control method for a multi-process flue gas purification system, including the following steps:
determining tniThe activated carbon circulation flow W of the flue gas purification device in the working procedure n corresponding to the momentXn(tni)(ii) a Wherein n is the serial number of each procedure in the multi-procedure flue gas purification system; t is tni＝t-Tni，TniThe time for conveying the polluted activated carbon corresponding to the flue gas purification device at the moment i to the activated carbon centralized analysis and activation subsystem in the process n is shown;
according to the activated carbon circulation flow W of the flue gas purification device in the working procedure nXn(tni)Determining the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time tX0；
According to the activated carbon concentrated solutionActivated carbon circulation flow W of analysis and activation subsystemX0Adjusting the discharge flow W of the belt weigherC(ii) a And, obtaining WC＝WX0Running frequency f of the belt scalec；
According to the operating frequency f of the belt scalecAdjusting the given frequency f of a feeding device in the active carbon centralized analysis and activation subsystemgAnd a given frequency f of the discharge devicepSo as to realize the control of the multi-process flue gas purification system.
Alternatively, t is determined as followsniThe activated carbon circulation flow W of the flue gas purification device in the working procedure n corresponding to the momentXn(tni)：
The total amount of raw flue gas V generated in the production process according to the procedure nnAnd calculating t according to the following formulaniSO in the original flue gas corresponding to the time2And NOXTotal flow rate;
WSn(tni)＝Vn×CSn/106；
WNn(tni)＝Vn×CNn/106；
in the formula, WSn(tni)For the process n at tniSO in original flue gas corresponding to each moment2Total flow, unit kg/h; wNn(tni)For the process n at tniNO in original smoke corresponding to timeXTotal flow, unit kg/h; cSnFor the process n at tniSO in original flue gas corresponding to each moment2Concentration in mg/Nm3；CNnFor the process n at tniNO in original smoke corresponding to timeXConcentration in mg/Nm3；
According to SO in the raw flue gas2And NOXTotal flow, and the following equation, calculate tniThe activated carbon circulation flow W of the flue gas purification device in the working procedure n corresponding to the momentXn(tni)；
WXn(tni)＝K1×WSn(tni)+K2×WNn(tni)；
In the formula, WXn(tni)T corresponding to the flue gas purification device in the working procedure nniThe circulating flow of the activated carbon at the moment is unit kg/h; k1The coefficient is a first coefficient, and the value range is 15-21; k2The second coefficient is a value range of 3-5.
Optionally, the activated carbon circulation flow W of the activated carbon centralized analysis and activation subsystem corresponding to the current time t is determined according to the following stepsX0：
According to the following formula, the activated carbon circulation flow W of the flue gas purification device in the working procedure n is determinedXn(tni)Determining the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time tX0；
WX0＝∑WXn(tni)＝∑WXn(t-Tni)；
Where T is the current time, TniAnd (4) conveying the polluted activated carbon corresponding to the flue gas purification device at the moment i to the activated carbon centralized analysis and activation subsystem in the process n.
Optionally, the activated carbon circulation flow W of the activated carbon centralized analysis and activation subsystem corresponding to the current time t is determined according to the following stepsX0：
Determining the supplement flow W of the new active carbon supplement device for supplementing the new active carbonSupplement deviceAccording to the supplement flow WSupplement deviceControlling the new active carbon supplementing device to supplement new active carbon into the total active carbon bin;
according to the activated carbon circulation flow W of the flue gas purification device in the working procedure nXn(tni)Supplement flow rate WSupplement deviceAnd determining the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time t according to the following formulaX0；
WX0＝∑WXn(t-Tni)+WSupplement device。
Optionally, the flow rate W of the new activated carbon replenishing device for replenishing new activated carbon is determined according to the following stepsSupplement device：
According to the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystemX0Determining the filling quantity Q of the activated carbon in the desorption tower in the activated carbon centralized desorption and activation subsystem according to the following formula0；
Q0＝WX0×T0；
In the formula, Q0The filling amount of the activated carbon in unit kg in an analytic tower in an activated carbon centralized analysis and activation subsystem; t is0The retention time of the activated carbon in the desorption tower is 4-8, and the unit h;
detecting the actual active carbon material quantity Q of the active carbon bin in the active carbon centralized analysis and activation subsystemFruit of Chinese wolfberry；
According to the active carbon filling quantity Q of the desorption tower0And actual amount of activated carbon material QFruit of Chinese wolfberryAccording to formula QDecrease in the thickness of the steel＝Q0-QFruit of Chinese wolfberryDetermining the amount Q of the lost active carbon material after the active carbon is screened by the screening deviceDecrease in the thickness of the steel；
Controlling the amount Q of the supplementary activated carbon material of the new activated carbon supplementary deviceSupplement deviceWith the amount of lost active carbon material QDecrease in the thickness of the steelEqual according to the adjusted quantity Q of the supplementary activated carbonSupplement deviceDetermining the replenishment flow rate W of the new activated carbon for replenishment of the new activated carbon replenishment device per unit timeSupplement device。
Optionally, the operation frequency f of the belt scale is determined according to the following stepscAdjusting the given frequency f of a feeding device in the active carbon centralized analysis and activation subsystemgAnd a given frequency f of the discharge devicep：
Determining the discharge flow W of the belt scaleC＝Kc×fcDischarge flow W of the feeding deviceG＝Kg×fgDischarge flow W of discharge deviceP＝Kp×fp(ii) a In the formula, Kc, KgAnd KpAre all constants;
controlling the feeding device, the discharging device and the belt scale of the activated carbon centralized analysis and activation subsystem to have the same blanking flow so as to ensure that the W isG＝WP＝WC＝WX0；
According to the above formula, obtaining the given frequency f of the feeding devicegOperating frequency f of belt scalecSatisfies the following relation:according to the above formula and the running frequency f of the belt scalecAdjusting the given frequency f of the feeding deviceg(ii) a And the number of the first and second groups,
obtaining a given frequency f of the discharge devicepOperating frequency f of belt scalecSatisfies the following relation:according to the above formula and the running frequency f of the belt scalecAdjusting the given frequency f of the discharge devicep。
In a third aspect, an embodiment of the present application provides a control method for a multi-process flue gas purification system, including the following steps:
determining the activated carbon circulation flow W of the flue gas purification device in the sintering procedure corresponding to the current time tX01(ii) a And, determining tniThe activated carbon circulation flow W of the flue gas purification device in the working procedure n corresponding to the momentXn(tni)(ii) a Wherein n is the serial number of each procedure in the multi-procedure flue gas purification system; t is tni＝t-Tni，TniThe time for conveying the polluted activated carbon corresponding to the flue gas purification device at the moment i to the activated carbon centralized analysis and activation subsystem in the process n is shown;
according to the flue gas purification device in the working procedure nCirculation flow W of activated carbonXn(tni)And the activated carbon circulation flow W of the flue gas purification device in the sintering processX01And determining the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time t according to the following formulaX0；
WX0＝∑WXn(t-Tni)+WX01；
According to the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystemX0Adjusting the discharge flow W of the belt weigherC(ii) a And, obtaining WC＝WX0-WX01Running frequency f of the belt scalec；
According to the operating frequency f of the belt scalecAdjusting the given frequency f of a feeding device in the active carbon centralized analysis and activation subsystemgAnd a given frequency f of the discharge devicepSo as to realize the control of the multi-process flue gas purification system.
Optionally, the method further comprises:
according to the activated carbon circulation flow W of the flue gas purification device in the sintering processX01And formula WUnloading 1＝WX01Xj, determining the discharge flow W of the discharging device in the sintering processUnloading 1(ii) a Wherein j is a coefficient and has a value range of 0.9-0.97; and controlling the discharge flow W of the discharge device in the step nUnloading 2Is the largest.
In a fourth aspect, an embodiment of the present application provides a control method for a multi-process flue gas purification system, including the following steps:
determining the activated carbon circulation flow W of the flue gas purification device in the sintering procedure corresponding to the current time tX01Determining tniThe activated carbon circulation flow W of the flue gas purification device in the working procedure n corresponding to the momentXn(tni)(ii) a And determining the supplementary flow W of the new activated carbon supplementary device for supplementing the new activated carbonSupplement device(ii) a Wherein n is the serial number of each procedure in the multi-procedure flue gas purification system; t is tni＝t-Tni，TniThe time for conveying the polluted activated carbon corresponding to the flue gas purification device at the moment i to the activated carbon centralized analysis and activation subsystem in the process n is shown;
according to the activated carbon circulation flow W of the flue gas purification device in the working procedure nXn(tni)Activated carbon circulation flow W of flue gas purification device in sintering processX01And a supplementary flow rate WSupplement deviceAnd determining the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time t according to the following formulaX0；
WX0＝∑WXn(t-Tni)+WSupplement device+WX01；
According to the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystemX0Adjusting the discharge flow W of the belt weigherC(ii) a And, obtaining WC＝WX0-WX01Running frequency f of the belt scalec；
According to the operating frequency f of the belt scalecAdjusting the given frequency f of a feeding device in the active carbon centralized analysis and activation subsystemgAnd a given frequency f of the discharge devicepSo as to realize the control of the multi-process flue gas purification system.
According to the technical scheme, the multi-process flue gas purification system and the control method thereof comprise an active carbon centralized analysis and activation subsystem, an active carbon conveying subsystem and flue gas purification devices corresponding to all processes, wherein each flue gas purification device is connected with the active carbon centralized analysis and activation subsystem through the active carbon conveying subsystem, polluted active carbon discharged by the flue gas purification devices corresponding to all processes is conveyed to a main active carbon bin of the active carbon centralized analysis and activation subsystem respectively, analysis and activation are performed by an analysis tower, and the obtained activated carbon is conveyed to the flue gas purification devices of all processes, so that cyclic utilization of the active carbon is realized. The process control unit arranged in the flue gas purification device in each process sends the activated carbon circulation flow of the corresponding flue gas purification device to the main control unit, the main control unit utilizes the sum of the activated carbon circulation flow corresponding to all the processes to represent the activated carbon circulation flow of the activated carbon centralized analysis activation subsystem, and controls the activation subsystem control unit arranged in the activated carbon centralized analysis activation subsystem to adjust the given frequency of a belt scale, a feeding device and a discharging device in the activated carbon centralized analysis activation subsystem, so that the activated carbon circulation flow at the activated carbon centralized analysis activation subsystem is substantially equal to the sum of the activated carbon circulation flow of the flue gas purification device in each process, the adsorption part and the analysis part of the multi-process flue gas purification system achieve the purpose of synchronous operation, and further the theoretical activated carbon circulation flow of the activated carbon centralized analysis activation subsystem and the activated carbon circulation flow of the flue gas purification device in each process are balanced, the operation efficiency is improved.
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 any creative effort.
FIG. 1 is a schematic diagram of a conventional flue gas purification system;
FIG. 2 is a schematic structural diagram of a multi-process flue gas purification system according to an embodiment of the present disclosure;
FIG. 3 is a block diagram of a multi-process flue gas purification system according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a multi-process flue gas purification system provided in the second embodiment of the present application;
fig. 5 is a block diagram of a multi-process flue gas purification system according to a second embodiment of the present application;
FIG. 6 is a flow chart of a control method of the multi-process flue gas purification system according to the embodiment of the present application;
FIG. 7 is a flowchart of an embodiment of the present application for determining a circulating flow method of activated carbon in a flue gas purification apparatus in each process;
FIG. 8 is a flow chart of a method for determining a replenishment flow rate for replenishing new activated carbon according to an embodiment of the present disclosure;
FIG. 9 is a flow chart of a method for controlling a multi-process flue gas cleaning system according to yet another embodiment of the present application;
FIG. 10 is a flow chart of a method for controlling a multi-process flue gas cleaning system according to another embodiment of the present application.
Illustration of the drawings:
wherein, 1-a flue gas purification device, 11-a feeding device, 12-an adsorption tower, 13-a discharging device, 14-a buffer bin, 15-a discharging device, 16-a clean flue gas, 17-a raw flue gas, 2-an active carbon centralized analysis and activation subsystem, 21-a buffer bin, 22-a feeding device, 23-an analysis tower, 24-a discharging device, 25-a total active carbon bin, 26-a belt scale, 27-a screening device, 28-an active carbon bin, 29-a new active carbon replenishing device, 20-a separating device, 201-a sintering process discharging device, 202-a process discharging device, 3-an active carbon conveying subsystem, 110-a process 1 flue gas purification device, 111-a process 1 feeding device, 112-a process 1 adsorption tower, 113-process 1 discharge equipment, 114-process 1 buffer bin, 115-process 1 discharge equipment, 116-process 1 clean flue gas, 117-process 1 raw flue gas, 118-process 1 activated carbon bin, 119-process 1 belt scale, 120-process 2 flue gas purification device, 121-process 2 feed equipment, 122-process 2 adsorption tower, 123-process 2 discharge equipment, 124-process 2 buffer bin, 125-process 2 discharge equipment, 126-process 2 clean flue gas, 127-process 2 raw flue gas, 128-process 2 activated carbon bin, 129-process 2 belt scale, 10-computer subsystem, 100-main control unit, 1011-process 1 control unit, 101 n-process n control unit, 102-activation subsystem control unit, 103-sintering process control unit, 104-new carbon supply control unit, 4-flue gas purification device in sintering process, 41-sintering process feeding equipment, 42-sintering process adsorption tower, 43-sintering process discharging equipment, 44-sintering process raw flue gas and 45-sintering process clean flue gas.
Detailed Description
FIG. 2 is a schematic structural diagram of a multi-process flue gas purification system according to an embodiment of the present disclosure; fig. 3 is a block diagram of a multi-process flue gas purification system according to an embodiment of the present disclosure.
Referring to fig. 2, the multi-process flue gas purification system provided by the embodiment of the present application includes: the device comprises an active carbon centralized analysis and activation subsystem 2, an active carbon conveying subsystem 3 and flue gas purification devices corresponding to all working procedures, wherein each flue gas purification device is respectively connected with the active carbon centralized analysis and activation subsystem 2 through the active carbon conveying subsystem 3.
In this embodiment, in order to improve the efficiency of flue gas purification in the steel plant, set up an active carbon centralized analysis activation subsystem 2 throughout the plant, the flue gas purification device that each process department set up is concentrated analysis activation subsystem 2 intercommunication with same active carbon respectively, forms one-to-many structural relation promptly.
For example, as shown in fig. 2, in the multi-process flue gas purification system, the flue gas purification device 110 in process 1 and the flue gas purification device 120 in process 2 are respectively connected in series through the activated carbon delivery subsystem 3 and the activated carbon centralized analysis and activation subsystem 2, the contaminated activated carbon discharged from each flue gas purification device is respectively delivered to the activated carbon centralized analysis and activation subsystem 2, and the activated carbon obtained after analysis and activation is respectively delivered to the flue gas purification devices in each process, so as to realize the recycling of the activated carbon.
It should be noted that fig. 2 is only an exemplary diagram showing the relationship between the process 1 flue gas cleaning device 110 and the process 2 flue gas cleaning device 120 and the activated carbon concentrated desorption activation subsystem 2. There are actually a plurality of processes for generating flue gas according to the production process of the steel plant. Therefore, the multi-process flue gas purification system comprises flue gas purification devices corresponding to a plurality of processes. In this embodiment, the multi-process flue gas purification system is exemplified by including the process 1 flue gas purification device 110 and the process 2 flue gas purification device 120.
In order to realize the recycling of the activated carbon between each flue gas purification device and the activated carbon centralized analysis and activation subsystem 2, the activated carbon is transported by using the activated carbon conveying subsystem 3. In a steel plant, the distance between two adjacent flue gas purification devices is far, and the activated carbon centralized analysis and activation subsystem 2 and each flue gas purification device are in a series connection relationship, so that the distances between different flue gas purification devices and the activated carbon centralized analysis and activation subsystem 2 are different. The transportation by belt or conveyer may not be suitable for the case of long distance in order to realize the efficient transportation and recycling of the activated carbon. Therefore, in this embodiment, the activated carbon conveying subsystem 3 can be transported by an automobile besides a belt or a conveyor, so as to avoid the arrangement of the conveyor or the belt in the whole plant, increase the occupied area, influence the structural layout in the whole plant, and improve the efficiency of conveying the activated carbon at a longer distance.
Specifically, the active carbon centralized analysis and activation subsystem 2 comprises an analysis tower 23 for analyzing and activating the polluted active carbon discharged by the flue gas purification device corresponding to each process so as to obtain activated active carbon for recycling; the feeding device 22 is arranged at the inlet end of the desorption tower 23 and is used for feeding total pollution activated carbon discharged by the flue gas purification device corresponding to each process into the desorption tower 23 according to a certain frequency or flow so as to adapt to the desorption activation frequency of the desorption tower 23; the discharging device 24 is arranged at the outlet end of the desorption tower 23, the discharging device 24 is connected with the inlet end of the flue gas purification device corresponding to each process through the activated carbon conveying subsystem 3, and the discharging device 24 is used for discharging activated carbon obtained after desorption and activation of the desorption tower 23 into the activated carbon conveying subsystem 3 at a certain frequency or flow rate, and further transporting the activated carbon to the flue gas purification device in each process; the total activated carbon bin 25 is arranged between the outlet end of the flue gas purification device corresponding to each procedure and the feeding device and is used for collecting the polluted activated carbon discharged by the flue gas purification device in each procedure; and a belt scale 26 arranged between the total activated carbon bin 25 and the feeding device 22, and used for conveying all the polluted activated carbon collected in the total activated carbon bin 25 to the activated carbon conveying subsystem 3, and further conveying the polluted activated carbon into the buffer bin 21 arranged above the feeding device 22, wherein the feeding device 22 realizes the communication between the buffer bin 21 and the desorption tower 23, so that the polluted activated carbon is conveyed into the desorption tower 23 through the feeding device 22 according to a certain flow or frequency.
The process 1 flue gas purification apparatus 110 includes: a step 1 feeding device 111, a step 1 adsorption tower 112, a step 1 discharging device 113, a step 1 buffer bin 114, a step 1 discharging device 115, a step 1 activated carbon bin 118 and a step 1 belt scale 119. In the operation process of the flue gas purification device, the activated carbon bin 118 in the process 1 is used for containing activated carbon transported by the activated carbon centralized analysis and activation subsystem 2, and the activated carbon is transported to the activated carbon transport subsystem 3 through the belt scale 119 in the process 1, and because the flue gas purification device has a high height, in order to transport the activated carbon at a low position to the buffer bin in the process 1 at a high position, the activated carbon transport subsystem 3 can select a conveyor. Activated carbon stored in the working procedure 1 surge bin enters the working procedure 1 adsorption tower 112 through the working procedure 1 feeding device 111, meanwhile, the raw flue gas 117 of the working procedure 1 also enters the working procedure 1 adsorption tower 112, and after pollutants carried by the raw flue gas 117 of the working procedure 1 are adsorbed by the activated carbon in the working procedure 1 adsorption tower 112, the obtained clean flue gas 116 of the working procedure 1 is discharged outside. And the contaminated activated carbon adsorbed with the contaminants is discharged to the process 1 buffer bin 114 through the process 1 discharging device 113 for temporary storage, and when the contaminated activated carbon stored in the process 1 buffer bin 114 reaches a certain amount, the contaminated activated carbon is discharged to the activated carbon conveying subsystem 3 through the process 1 discharging device 115. Here, in order to increase the conveying amount and speed, the activated carbon conveying subsystem 3 may be an automobile, and the contaminated activated carbon is conveyed into the total activated carbon bin 25 by the activated carbon conveying subsystem 3 to wait for the desorption activation treatment.
Similarly, the process 2 flue gas purification apparatus 120 includes: a process 2 feeding device 121, a process 2 adsorption tower 122, a process 2 discharging device 123, a process 2 buffer bin 124, a process 2 discharging device 125, a process 2 activated carbon bin 128 and a process 2 belt scale 129, and process 2. The process of performing flue gas purification on the raw flue gas 117 in the process 2 by the flue gas purification device 120 in the process 2 to obtain the purified flue gas 126 in the process 2 is the same as that of the flue gas purification device 110 in the process 1, and the description thereof is omitted.
As shown in fig. 3, in order to realize accurate control of each subsystem and device in the multi-process flue gas purification system and improve the operation efficiency, the multi-process flue gas purification system provided in this embodiment further includes a computer subsystem 10, the computer subsystem 10 is configured with a main control unit 100, and an activation subsystem control unit 102 disposed in the activated carbon centralized analysis activation subsystem is configured to control the working state of each structure in the activated carbon centralized analysis activation subsystem 2 and adjust the working parameters; the process control unit is arranged in the flue gas purification device in each process and is used for controlling the working state of each structure in the corresponding flue gas purification device and adjusting working parameters; the main control unit 100 is used for performing bidirectional data transmission with the activation subsystem control unit 102 and the process control unit, and controls the activation subsystem control unit 102 and the process control unit to execute corresponding instructions through calculation and analysis of data, so that uniform and accurate control over the whole multi-process flue gas purification system is realized, and the operating efficiency of flue gas purification is improved.
Specifically, in practical application, the process control unit at each process has the function of determining that the flue gas purification device is at t in the current processniActivated carbon circulation flow W corresponding to momentXn(tni)(ii) a And the activated carbon circulation flow W of the flue gas purification device in the current working procedureXn(tni)To the main control unit 100; wherein n is the serial number of each procedure in the multi-procedure flue gas purification system; t is tni＝t-TniI is the time at which the corresponding data is transmitted, TniAnd (4) conveying the polluted activated carbon corresponding to the flue gas purification device at the moment i to the activated carbon centralized analysis and activation subsystem in the process n.
In this embodiment, the process control unit at each process sends the activated carbon flow in the corresponding flue gas purification device to the main control unit 100, so that the main control unit 100 performs calculation and analysis according to the activated carbon flow of the flue gas purification devices in all the processes to adjust the working state of the flue gas purification devices in the corresponding processes, thereby maximizing the operation efficiency of the overall multi-process flue gas purification system.
For this purpose, as shown in fig. 7, the process control unit corresponding to the respective process n determines that the flue gas cleaning device is in the current process at t as followsniActivated carbon circulation flow W corresponding to momentXn(tni)：
S21, generating total amount V of raw flue gas in the production process according to the procedure nnAnd calculating t according to the following formulaniSO in original flue gas corresponding to each moment2And NOXTotal flow rate;
WSn(tni)＝Vn×CSn/106；
WNn(tni)＝Vn×CNn/106；
in the formula, WSn(tni)For the process n at tniSO in original flue gas corresponding to each moment2Total flow, unit kg/h; wNn(tni)For the process n at tniNO in original smoke corresponding to timeXTotal flow, unit kg/h; vnIs tniTotal amount of raw flue gas in Nm corresponding to time3/h；CSnFor the process n at tniSO in original flue gas corresponding to each moment2Concentration in mg/Nm3；CNnFor the process n at tniNO in original smoke corresponding to timeXConcentration in mg/Nm3。
The main components of the pollutants generated by the steel plant are dust and SO2And NOXIn addition, there are a small amount of VOCs, dioxin, heavy metals, etc., but each step has a dust removal function and SO2And NOXThe content of other pollutants is less, SO the flue gas purifying device mainly removes SO in the flue gas2And NOXTherefore, according to the entering of the suctionSO carried in flue gas of attached tower2And NOXThe amount of the activated carbon is calculated to obtain the optimal adsorption effect, and the conditions of adsorption saturation and insufficient adsorption can not occur.
S22, according to SO in the original flue gas2And NOXTotal flow, and the following equation, calculate tniThe activated carbon circulation flow W of the flue gas purification device in the working procedure n corresponding to the momentXn(tni)；
WXn(tni)＝K1×WSn(tni)+K2×WNn(tni)；
In the formula, WXn(tni)T corresponding to the flue gas purification device in the working procedure nniThe circulating flow of the activated carbon at the moment is unit kg/h; k1The coefficient is a first coefficient, and the value range is 15-21; k2The second coefficient is a value range of 3-5.
Because the activated carbon is in a flowing state in the adsorption tower and the flue gas is in a flowing state, in order to enable the activated carbon in the adsorption tower to perform the optimal adsorption action on the flue gas entering the adsorption tower, the flowing state of the activated carbon and the flowing state of the flue gas need to satisfy a certain proportional relationship, that is, the circulating flow of the activated carbon in the flue gas purification device and the SO in the original flue gas need to satisfy a certain proportional relationship2And NOXThere is a proportional relationship to the total flow.
The process control unit at each process respectively controls the activated carbon circulation flow W of the flue gas purification device in the current processXn(tni)The activated carbon circulation flow W sent to the main control unit 100, for example, the process 1 control unit 1011 of the process 1 flue gas cleaning device 110X1(t1i)To the main control unit 100; the step 2 control means 1012 sets the activated carbon circulation flow rate W of the flue gas purification apparatus 120 of step 2X2(t2i)To the main control unit 100; the process n control unit 101n controls the flow rate W of the activated carbon circulation of the flue gas purification apparatus in the process nXn(tni)To the main control unit 100.
The main control unit 100 obtains tniThe activated carbon circulation flow W of the flue gas purification device in the working procedure n corresponding to the momentXn(tni)According to the activated carbon circulation flow W of the flue gas purification device in all the working proceduresXn(tni)Determining the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time tX0. The circulation amount WX0The theoretical active carbon circulation quantity of the active carbon centralized analysis activation subsystem can be accurately controlled according to the theoretical value, and the operating state and the working parameters of the active carbon centralized analysis activation subsystem can be accurately controlled.
Specifically, the main control unit 100 follows the following formula according to the activated carbon circulation flow rate W of the flue gas purification device in the process nXn(tni)Determining the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time tX0；
WX0＝∑WXn(tni)＝∑WXn(t-Tni)；
Where T is the current time, TniAnd the time for conveying the polluted activated carbon corresponding to the flue gas purification device at the moment i to the activated carbon centralized analysis and activation subsystem in the process n is provided by the activated carbon conveying subsystem 3.
Activated carbon circulation flow W of activated carbon centralized analysis activation subsystemX0The total of the activated carbon circulation flow of the flue gas purification device in each process, but the current time t when the theoretical activated carbon circulation flow of the activated carbon centralized analysis and activation subsystem 2 is calculated is not the time t when each process control unit determines the activated carbon circulation flow of the flue gas purification device in each corresponding process and sends datani. This is because the transportation of the contaminated activated carbon exhausted from the flue gas purification device to the activated carbon centralized analysis and activation subsystem 2 requires a certain time, and the transportation of the contaminated activated carbon from different processes to the activated carbon centralized analysis and activation subsystem 2 requires different times at different times. The flue gas volume and the pollutant concentration generated in the production process of each procedure are changed constantly, so that the circulation flow of the activated carbon in the flue gas purification device is changed at different moments, and the current moment cannot be guaranteedT, the polluted activated carbon received by the activated carbon centralized analysis and activation subsystem 2 is just the polluted activated carbon discharged by the flue gas purification device in the corresponding process, i.e. it cannot be ensured that the circulation flow of the polluted activated carbon received by the activated carbon centralized analysis and activation subsystem 2 is the actual activated carbon circulation flow of the activated carbon in the corresponding flue gas purification device, and the activated carbon circulation flow obtained by the activated carbon centralized analysis and activation subsystem control unit 102 at the current moment T needs the corresponding process after the transportation time T passesniCan be acquired later, namely the accurate control of the multi-process flue gas purification system needs to be delayed by TniAfter a period of time, this reduces the operating efficiency, resulting in a theoretical activated carbon circulation flow W of the resulting activated carbon concentrated analytical activation subsystemX0Is inaccurate.
For example, the current time T when the theoretical activated carbon circulation flow of the activated carbon centralized analysis and activation subsystem 2 is calculated is 10:00, and the time T when the polluted activated carbon discharged by the flue gas purification device in the process 1 is transported to the activated carbon centralized analysis and activation subsystem1i0.5 hour, the process 1 control unit 1011 needs to change t1iThe activated carbon circulation flow W of the flue gas purification device in the working procedure 1 corresponding to the time of 9:30X1(t1i)To the main control unit 100; for another example, the current time T when the theoretical activated carbon circulation flow of the activated carbon centralized analysis and activation subsystem 2 is calculated is 14:20, and the time T when the polluted activated carbon discharged by the flue gas purification device in the working procedure 2 is transported to the activated carbon centralized analysis and activation subsystem2i40 minutes, then, the process 2 control unit 1012 sets t to2iThe activated carbon circulation flow W of the flue gas purification device in the working procedure 2 corresponding to the time of 13:40X2(t2i)To the main control unit 100.
Therefore, in order to ensure the operation efficiency of the multi-process flue gas purification system, and the data obtained by the activation sub-system control unit 102, i.e., the activated carbon circulation flow W of the flue gas purification apparatus in each processXn(tni)So that the acquired data can accurately represent the activated carbon circulation flow W of the activated carbon centralized analysis and activation subsystem at the current moment tX0Therefore, it is necessary to acquire the advance transit time at the current time tTniThe time corresponds to the active carbon circulation flow of the flue gas purification device in each process at the moment, namely W is utilizedXn(t-Tni)And converting into the activated carbon circulation flow of the flue gas purification device in each process corresponding to the current time t.
When the main control unit 100 determines that the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystemX0Then, the blanking flow of the belt weigher 26 needs to be adjusted according to the data, so as to adjust the blanking flows of the feeding device 22 and the discharging device 24 of the analysis tower 23 according to the blanking flow of the belt weigher 26, so that the blanking flow of the belt weigher 26, the blanking flow of the feeding device 22 and the blanking flow of the discharging device 24 are equal to the theoretical activated carbon circulation flow of the activated carbon centralized analysis activation subsystem 2, and the effect of accurately controlling the multi-process flue gas purification system is achieved.
In actual operation, the actual operation frequency of the belt scale 26 may not reach the degree of accurate control, and therefore, in order that the activated carbon circulation flow rate of the flue gas purification device of each process may be the same as the activated carbon circulation flow rate of the active carbon centralized analysis activation subsystem 2, the whole multi-process flue gas purification system may be operated synchronously, and it is avoided that the amount of activated carbon transported by the activated carbon centralized analysis activation subsystem 2 is insufficient to support the amount of flue gas adsorbed by the flue gas purification device in each process, thereby reducing the adsorption effect, or the amount of activated carbon transported by the activated carbon centralized analysis activation subsystem 2 is too much, thereby leading to the flue gas purification device in each process being in a saturated state and causing the activated carbon to overflow. Therefore, it is necessary to control the discharge flow rate W of the belt scale 26CActivated carbon circulation flow W of activated carbon centralized analysis activation subsystemX0Are equal.
Specifically, the activation sub-system control unit 102 analyzes the activated carbon circulation flow W of the activation sub-system according to the activated carbon concentrationX0Adjusting the discharge flow W of the belt weigher 26CThe blanking flow of the belt weigher 26 is gradually equal to the activated carbon circulation flow of the activated carbon centralized analysis and activation subsystem 2, and W is determinedC＝WX0Belt with time-to-time correspondence functionOperating frequency f of the balance 26c. The operating frequency fcIs the theoretical operating frequency of the belt weigher 26, i.e. the operating frequency which enables the multi-process flue gas cleaning system to operate synchronously.
The main control unit 100 then obtains the operating frequency f of the belt scale 26cAccording to the operating frequency f of the belt scale 26cSending an adjustment instruction to the activation subsystem control unit 102 to cause the activation subsystem control unit 102 to adjust the given frequency f of the feeder 22gAnd a given frequency f of the discharge device 24pSo as to realize the control of the multi-process flue gas purification system.
Specifically, in this embodiment, the main control unit 100 analyzes and calculates the data according to the acquired data, and generates a control instruction according to the result to control the activation subsystem control unit 102 to execute a corresponding operation. Therefore, to accurately depend on the operating frequency f of the belt scale 26cAdjusting the given frequency f of the feeding device 22gAnd a given frequency f of the discharge device 24pThe main control unit 100 is configured to perform the following program steps:
s61, determining the blanking flow W of the belt scaleC＝Kc×fcDischarge flow W of the feeding deviceG＝Kg×fgDischarge flow W of discharge deviceP＝Kp×fp(ii) a In the formula, Kc, KgAnd KpAre constants related to the width of the belt scale 26, the width of the outlet of the feeding device 22, the width of the outlet of the discharging device 24, the parameters of the motor and the frequency converter, the specific gravity of the activated carbon and the like.
Because the belt weigher 26, the feeding device 22 and the discharging device 24 are all feeding devices driven by the motor to transport materials, the motor is dragged by the frequency converter, and the operating frequency of the frequency converter determines the rotating speed of the frequency converter, the material conveying flow of the belt weigher 26, the feeding device 22 and the discharging device 24 is in direct proportion to the rotating speed of the motor, namely the blanking flow is in direct proportion to the rotating speed of the motor.
S62 control supply of activated carbon centralized analysis activation subsystemThe discharging flow of the material device, the discharging device and the belt scale is the same, so that W isG＝WP＝WC＝WX0。
According to the above description, in order to make the activated carbon circulation flow rate of the flue gas purification device of each process be the same as the activated carbon circulation flow rate of the activated carbon centralized analysis and activation subsystem 2, so that the whole multi-process flue gas purification system can be operated synchronously, it is necessary to analyze the theoretical activated carbon circulation flow rate W of the activation subsystem 2 according to the activated carbon centralized analysisX0Adjusting the blanking flow of the belt weigher 26, and adjusting the blanking flow of the feeding device 22 and the discharging device 24 of the analysis tower 23 according to the blanking flow of the belt weigher 26, so that the blanking flow W of the belt weigher 26CThe discharge flow W of the feeder 22GAnd the discharge flow rate W of the discharge device 24PAnd the theoretical activated carbon circulation flow W of the activated carbon centralized analysis activation subsystemX0Are equal.
S63, obtaining the given frequency f of the feeding device according to the formulagOperating frequency f of belt scalecSatisfies the following relation:so that the operating frequency f of the belt scale is adjusted according to the above formulacAdjusting the given frequency f of the feeding deviceg(ii) a And the number of the first and second groups,
to obtain a given frequency f of the discharge devicepOperating frequency f of belt scalecSatisfies the following relation:so that the operating frequency f of the belt scale is adjusted according to the above formulacAdjusting the given frequency f of the discharge devicep。
According to a given frequency f of the feed device 22gA given frequency f of the discharge device 24pWith the operating frequency f of the belt scale 26cProportional relationship therebetween, i.e. fg、fpIs adjusted tocEqual to each other, thereby ensuring the practical transportationIn-line, the discharge flow W of the belt weigher 26CThe discharge flow W of the feeder 22GAnd the discharge flow rate W of the discharge device 24PAnd the theoretical activated carbon circulation flow W of the activated carbon centralized analysis activation subsystemX0Equal to each other, so that the theoretical activated carbon circulation flow W of the activated carbon centralized analysis activation subsystemX0The activated carbon circulation flow of the flue gas purification device of each process is balanced, so that the whole multi-process flue gas purification system can be ensured to synchronously operate, and the operation efficiency is optimal.
Since the weight of the contaminated activated carbon is changed after the desorption and activation treatment in the desorption tower 23, and the activated carbon is wasted when the activated carbon is discharged, in order to keep the balance between the discharge flow of the feeding device 22 and the discharge flow of the discharging device 24 in the desorption tower 23, the activated carbon centralized desorption and activation subsystem 2 needs to be supplemented with new activated carbon.
In this embodiment, the supplementing point for supplementing new activated carbon is located in the activated carbon centralized analysis and activation subsystem 2, that is, the activated carbon centralized analysis and activation subsystem 2 provided in this embodiment further includes: a new activated carbon supplement device 29 disposed above the total activated carbon bin 25.
In the embodiment, the device for supplementing new activated carbon is arranged at the total activated carbon bin 25, because the total activated carbon bin 25 is used for receiving the polluted activated carbon discharged by the flue gas purification devices in each procedure of the whole plant, all the polluted activated carbon is received and then is uniformly conveyed to the analysis tower 23 for analysis and activation, and the obtained activated carbon is uniformly conveyed to the flue gas purification devices in each procedure, so that the cyclic utilization of the activated carbon is realized. The total activated carbon bin 25 receives all the polluted activated carbon, so that the amount of the total consumed activated carbon can be totally reduced when the activated carbon of the flue gas purification device in each process is used for adsorbing flue gas and transporting the flue gas, further the activated carbon can be uniformly supplemented at the total activated carbon bin 25, the situation that the activated carbon is singly supplemented at the flue gas purification device in each process is avoided, the amount of the new activated carbon which is supplemented every time cannot be guaranteed, and the overall operation efficiency of the system can be influenced.
The new activated carbon supplementing device 29 is internally provided with a new activated carbon supplementing control unit 104, the new activated carbon supplementing control unit 104 performs bidirectional data transmission with the main control unit 100, and the new activated carbon supplementing control unit 104 is used for controlling the new activated carbon supplementing device 29 to supplement new activated carbon for the total activated carbon bin 25 according to a certain frequency according to an instruction of the main control unit 100.
If new active carbon enters the total active carbon bin 25, the active carbon circulation volume W of the active carbon centralized analysis and activation subsystem is changedX0Thus, in calculating WX0Not only the activated carbon circulation flow of the flue gas purification device in each process but also the activated carbon flow when new activated carbon is supplemented into the total activated carbon bin 25 need to be considered.
Specifically, in this embodiment, the main control unit 100 of the multi-process flue gas purification system determines the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time t according to the following stepsX0：
S41, determining the supplementary flow W of the new activated carbon supplementary deviceSupplement deviceAccording to the supplement flow WSupplement deviceAnd controlling the new active carbon supplementing device to supplement new active carbon into the total active carbon bin.
In this embodiment, the fresh carbon supply control unit 104 determines the supply flow rate W of the fresh activated carbon supply from the fresh activated carbon supply device 29Supplement device. Because the centralized analysis and activation subsystem 2 of the activated carbon carries out uniform analysis and activation on all the polluted activated carbon, the obtained activated carbon is uniformly conveyed to each procedure, and the flue gas purification device is not provided with screening loss carbon in each procedure, but the centralized analysis and activation subsystem 2 of the activated carbon carries out uniform screening loss carbon, so that the data accuracy of the screening loss carbon is ensured, and the operation efficiency of the whole system can be improved.
In this embodiment, the centralized activated carbon desorption and activation subsystem 2 further includes: the screening device 27 is located below the discharge device 24, and the activated carbon bin 28 is located below the screening device 27, the screening device 27 is used for screening the activated carbon analyzed and activated by the analysis tower 23, the activated carbon with the target granularity is obtained and stored in the activated carbon bin 28, and the activated carbon in the activated carbon bin 28 is a source of the activated carbon required by the flue gas purification device in each process. In this embodiment, the screening device 27 may be a vibrating screen, or may be another device having a screening function, and is not specifically limited in this embodiment.
In actual operation, the sieving device 27 generates a small amount of loss when sieving the desorbed activated carbon, and the loss may include the loss of activated carbon generated when the flue gas is adsorbed by the flue gas purification device in each process, the loss generated during transportation, the loss generated in the desorption tower 23, and the loss generated after passing through the sieving device 27. It can be seen that the carbon consumption generated by the sieving device 27 disposed at the position of the active carbon centralized analysis and activation subsystem 2 is the sum of all carbon consumption generated by the multi-process flue gas purification system during operation. According to the amount of the consumed carbon generated at the position, the new amount of the activated carbon needing to be supplemented at the position of the total activated carbon bin 25 can be accurately and quickly determined so as to ensure the theoretical activated carbon circulation flow W of the activated carbon centralized analysis activation subsystemX0The activated carbon circulation flow of the flue gas purification device of each process is balanced, so that the whole multi-process flue gas purification system can be ensured to synchronously operate, and the operation efficiency is optimal.
For this purpose, the replenishment flow rate W for replenishing new activated carbon by the new activated carbon replenishment device 29 per unit time is accurately determinedSupplement device. As shown in fig. 8, the activation subsystem control unit 102 in this embodiment adopts the following steps:
s411, analyzing the activated carbon circulation flow W of the activation subsystem according to the activated carbon concentrationX0Determining the filling quantity Q of the activated carbon in the desorption tower in the activated carbon centralized desorption and activation subsystem according to the following formula0；
Q0＝WX0×T0；
In the formula, Q0For the desorption tower in the active carbon centralized desorption activation subsystemThe filling amount of the activated carbon is unit kg; t is0The retention time of the activated carbon in the desorption tower is 4-8, and the unit h;
in this example, the amount of lost activated carbon was determined using the difference between the amount of all contaminated activated carbon entering the desorption column and the amount of activated carbon discharged.
Therefore, it is necessary to analyze the activated carbon circulation flow rate W of the activation sub-system in accordance with the activated carbon concentrationX0And the retention time T of the contaminated activated carbon in the desorption tower0Determining the active carbon filling quantity Q of the analytical tower at the current moment t0。
S412, detecting the actual active carbon material quantity Q of the active carbon bin in the active carbon centralized analysis and activation subsystemFruit of Chinese wolfberry；
S413, according to the active carbon filling amount Q of the desorption tower0And actual amount of activated carbon material QFruit of Chinese wolfberryAccording to formula QDecrease in the thickness of the steel＝Q0-QFruit of Chinese wolfberryDetermining the amount Q of the lost active carbon material after the active carbon is screened by the screening deviceDecrease in the thickness of the steel；
The activation subsystem control unit 102 detects the actual quantity Q of the activated carbon material in the activated carbon bin corresponding to the current time tFruit of Chinese wolfberryThen according to the filling quantity Q of the active carbon in the desorption tower 230And the amount of all the lost active carbon materials generated by the multi-process flue gas purification system in one-time circulating operation can be determined.
S414, controlling the quantity Q of the supplementary active carbon material of the new active carbon supplementary deviceSupplement deviceWith the amount of lost active carbon material QDecrease in the thickness of the steelEqual according to the adjusted quantity Q of the supplementary activated carbonSupplement deviceDetermining the replenishment flow rate W of the new activated carbon for replenishment of the new activated carbon replenishment device per unit timeSupplement device。
The amount Q of the lost activated carbon material generated after passing through the screening device 27Decrease in the thickness of the steelThat is, the amount of the new activated carbon material to be actually supplemented by the new activated carbon supplementing device 29. Therefore, the amount of the activated carbon material Q will be lostDecrease in the thickness of the steelAs a reference, the control unit 1 is controlled by a fresh carbon04 controlling new active carbon supplement device 29 according to the amount Q of the lost active carbon materialDecrease in the thickness of the steelDetermining the quantity Q of the supplemented active carbon materialSupplement device. When the amount of the supplementary material is determined, the supplementary flow W of the supplementary new active carbon in unit time can be determinedSupplement device。
When the new activated carbon replenishing device 29 replenishes the new activated carbon with the replenishment flow WSupplement deviceAfter the determination, the new activated carbon supplement device is controlled by the new activated carbon control unit 104 according to the supplement flow WSupplement deviceAnd supplementing new active carbon into the total active carbon bin.
S42, according to the activated carbon circulation flow W of the flue gas purification device in the procedure nXn(tni)Supplement flow rate WSupplement deviceAnd determining the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time t according to the following formulaX0；
WX0＝∑WXn(t-Tni)+WSupplement device。
Because the total activated carbon bin 25 comprises the polluted activated carbon discharged by the flue gas purification device in each process and the newly supplemented new activated carbon, the activated carbon circulation flow needs to be comprehensively considered when the theoretical activated carbon circulation flow of the activated carbon centralized analysis activation subsystem 2 is determined. The active carbon centralized analysis and activation subsystem 2 generates carbon loss during the current circulation, and then supplements the carbon loss to ensure that the corresponding active carbon circulation flow of the active carbon centralized analysis and activation subsystem during the next circulation is equal to the sum of the active carbon circulation flow of the flue gas purification device in each procedure. Therefore, the embodiment can ensure the accuracy of loss and supplement amount by uniformly screening the loss carbon and uniformly supplementing new active carbon, and can reduce the operation time to the maximum extent, thereby improving the operating efficiency of the multi-process flue gas purification system.
According to the technical scheme, the multi-process flue gas purification system provided by the embodiment of the application comprises an active carbon centralized analysis and activation subsystem 2, an active carbon conveying subsystem 3 and flue gas purification devices corresponding to all processes, wherein each flue gas purification device respectively conveys the activated carbon to the corresponding sub-systemThe system 3 is connected with the active carbon centralized analysis and activation subsystem 2, the polluted active carbon discharged by the flue gas purification device corresponding to each process is respectively conveyed to the total active carbon bin 25 of the active carbon centralized analysis and activation subsystem 2, and then is analyzed and activated by the analysis tower 23, and the obtained activated active carbon is conveyed to the flue gas purification device of each process, so that the cyclic utilization of the active carbon is realized. The process control unit arranged in the flue gas purification device in each process sends the activated carbon circulation flow of the corresponding flue gas purification device to the main control unit 100, the main control unit 100 represents the activated carbon circulation flow of the activated carbon centralized analysis and activation subsystem 2 by using the sum of the activated carbon circulation flow corresponding to all the processes, and controls an activation sub-system control unit 102 provided in the activated carbon centralized analysis activation sub-system 2, so as to adjust the given frequency of the belt weigher 26, the feeding device 22 and the discharging device 24 in the active carbon centralized analysis activation subsystem 2, the circulation flow of the activated carbon at the activated carbon centralized analysis and activation subsystem 2 is substantially equal to the sum of the circulation flow of the activated carbon of the flue gas purification device in each process, the adsorption part and the desorption part of the multi-process flue gas purification system can synchronously run, and the theoretical activated carbon circulation flow W of the activated carbon centralized desorption and activation subsystem can be further realized.X0The flow rate of the activated carbon circulation of the flue gas purification device in each process is balanced, and the operation efficiency is improved.
Fig. 4 is a schematic structural diagram of a multi-process flue gas purification system provided in the second embodiment of the present application; fig. 5 is a block diagram of a multi-process flue gas purification system according to a second embodiment of the present application.
As shown in fig. 4 and fig. 5, the multi-process flue gas purification system provided in the second embodiment of the present application is different from the above embodiments in that the system can also be applied to a sintering process, and in a steel plant, flue gas generated by the sintering process is much larger than flue gas generated by other processes, that is, the amount of flue gas generated by the sintering process is 70% of the total amount of flue gas generated by the steel plant. Therefore, in order to improve the operation efficiency during flue gas purification, the sintering process and the active carbon centralized analysis and activation subsystem 2 are arranged together, i.e. the multi-process flue gas purification system further comprises a flue gas purification device corresponding to the sintering process arranged in the active carbon centralized analysis and activation subsystem 2.
In this embodiment, the contaminated activated carbon discharged from the flue gas purification device 4 in the sintering process need not to be transported to the total activated carbon bin 25 for temporary storage, and can be directly transported to the desorption tower 23 for desorption and activation.
Because the flue gas that the sintering process produced is too much, and according to steel plant scale, the sintering process can include 1# sintering and 2# sintering, at this moment, in order to improve flue gas purification's operating efficiency, can set up two active carbon centralized analysis activation subsystem 2 correspondingly. In this embodiment, only one activated carbon centralized analysis activation subsystem 2, one flue gas purification device 4 in the sintering process, and a plurality of flue gas purification devices in other processes are provided as examples for illustration.
The flue gas purification device 4 in the sintering process has the same structure as the flue gas purification devices in the respective processes shown in fig. 2, and specifically, the flue gas purification device 4 in the sintering process includes: a sintering process feeding device 41, a sintering process adsorption tower 42 and a sintering process discharging device 43. The process of performing flue gas purification on the raw flue gas 44 in the sintering process by the flue gas purification device 4 in the sintering process to obtain the clean flue gas 45 in the sintering process is the same as that of the flue gas purification device 110 in the process 1, and reference may be made to the contents of the first embodiment for the corresponding process, which is not described herein again.
The flue gas purification device 4 in the sintering process is internally provided with a sintering process control unit 103 for performing bidirectional data transmission with the main control unit 100, and controlling the working state and adjusting the working parameters of the flue gas purification device 4 in the sintering process according to the instruction of the main control unit 100.
After a sintering process is added in the multi-process flue gas purification system, the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem is calculatedX0The activated carbon circulation flow of the flue gas purification device 4 in the sintering process and the activated carbon circulation flow of the flue gas purification device in each process are considered at the same time.
In practical applications, it is necessary to determine the current time using the sintering process control unit 103t corresponding to the activated carbon circulation flow W of the flue gas purification device in the sintering processX01(ii) a The activated carbon is circulated with a flow rate WX01To the main control unit 100.
Wherein, the activated carbon circulation flow W of the flue gas purification device 4 in the sintering processX01The method provided in the above embodiment can be referred to, according to SO in flue gas2And NOXThe total flow rate is determined and will not be described in detail herein.
As shown in fig. 9, the sintering process control unit 103 determines the current activated carbon circulation flow W of the flue gas cleaning apparatusX01Then, the activated carbon is circulated at a flow rate WX01Sending the current time t to the main control unit 100, and determining the activated carbon circulation flow W of the activated carbon centralized analysis and activation subsystem corresponding to the current time t by the main control unit 100 according to the following stepsX0：
S71, determining the activated carbon circulation flow W of the flue gas purification device in the sintering process corresponding to the current time tX01(ii) a And, determining tniThe activated carbon circulation flow W of the flue gas purification device in the working procedure n corresponding to the momentXn(tni)(ii) a Wherein n is the serial number of each procedure in the multi-procedure flue gas purification system; t is tni＝t-Tni，TniThe time for conveying the polluted activated carbon corresponding to the flue gas purification device at the moment i to the activated carbon centralized analysis and activation subsystem in the process n is shown;
because the sintering process and the activated carbon centralized analysis and activation subsystem 2 are integrated, the conveying time of the polluted activated carbon from the outlet of the adsorption tower of the flue gas purification device to the inlet of the analysis tower 23 can be ignored to be 0, and therefore, the activated carbon circulation flow W of the flue gas purification device 4 in the sintering process is obtainedX01The time of the step (b) may be the current time t for calculating the activated carbon circulation flow of the activated carbon centralized analysis and activation subsystem 2.
Activated carbon circulation flow W of flue gas purification device in procedure nXn(tni)The content of the above embodiments can be referred to for determining the method, and details are not repeated here.
S72, purifying the flue gas according to the procedure nCirculation flow W of activated carbonXn(tni)And the activated carbon circulation flow W of the flue gas purification device in the sintering processX01And determining the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time t according to the following formulaX0；
WX0＝∑WXn(t-Tni)+WX01。
S73, according to the activated carbon circulation flow W of the activated carbon centralized analysis and activation subsystemX0Adjusting the discharge flow W of the belt weigherC(ii) a And, obtaining WC＝WX0-WX01Running frequency f of the belt scalec；
S74, according to the running frequency f of the belt scalecAdjusting the given frequency f of a feeding device in the active carbon centralized analysis and activation subsystemgAnd a given frequency f of the discharge devicepSo as to realize the control of the multi-process flue gas purification system.
At this time, the activated carbon circulation flow rate of the activated carbon centralized analysis and activation subsystem 2 is the sum of the activated carbon circulation flow rate of the flue gas purification device 4 in the sintering process and the activated carbon circulation flow rate of the flue gas purification devices in the respective processes, and if the multi-process flue gas purification system is provided with operations of screening activated carbon and supplementing new activated carbon, when the activated carbon circulation flow rate of the activated carbon centralized analysis and activation subsystem is calculated, the supplementing flow rate W of the new activated carbon supplemented in the total activated carbon bin 25 is also consideredSupplement deviceFurther ensuring the theoretical activated carbon circulation flow W of the activated carbon centralized analysis activation subsystemX0The activated carbon circulation flow of the flue gas purification device in the sintering process and each process is balanced, so that the whole multi-process flue gas purification system can be ensured to synchronously operate, and the operation efficiency is optimal.
When a sintering process is added in the multi-process flue gas purification system, the theoretical activated carbon circulation flow of the activated carbon centralized analysis and activation subsystem is changed immediately, and the polluted activated carbon discharged by the flue gas purification device 4 in the sintering process is directly dischargedThen the waste water is conveyed to a desorption tower 23, and only the polluted activated carbon discharged by other processes is contained in a total activated carbon bin 25. At this time, the theoretical activated carbon circulation flow rate of the activated carbon centralized analysis activation subsystem 2 is the sum of the activated carbon circulation flow rate discharged from the flue gas purification device 4 in the sintering process and the activated carbon circulation flow rate of the flue gas purification device in other processes. Therefore, in order to accurately determine the blanking flow of the belt weigher 26 below the total activated carbon bin 25, the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem needs to be determined according to the activated carbon circulation flow WX0And the activated carbon circulation flow W of the flue gas purification device in the sintering processX01The difference is determined.
To this end, the activation subsystem control unit 102 is further configured to perform the following program steps: according to the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystemX0And the activated carbon circulation flow W of the flue gas purification device in the sintering processX01Adjusting the discharge flow W of the belt weigher 26CDetermining WC＝WX0-WX01Operating frequency f of belt scale 26c。
When the operating frequency f of the belt weigher 26 is redeterminedcThereafter, the given frequency f of the feeding device 22 of the stripper 23 is calculated againgA given frequency f of the discharge device 24pWith the operating frequency f of the belt scale 26cAnd then according to the re-determined proportional relationship, adjusting fg、fpAnd fcEqual to each other, thereby ensuring that the blanking flow W of the belt weigher 26 is equal to each other in actual operationCThe discharge flow W of the feeder 22GAnd the discharge flow rate W of the discharge device 24PEqual to each other, so that the theoretical activated carbon circulation flow W of the activated carbon centralized analysis activation subsystemX0The activated carbon circulation flow of the flue gas purification device of each process is balanced, so that the whole multi-process flue gas purification system can be ensured to synchronously operate, and the operation efficiency is optimal.
In addition, f isg、fpAnd fcThe determination of the proportional relationship can be made according to the corresponding method provided in the first embodiment, hereAnd will not be described in detail.
Because the multi-process flue gas purification system provided by the embodiment comprises the flue gas purification devices corresponding to the sintering process and the flue gas purification devices corresponding to other processes, after the activated carbon is generated, the problem that the activated carbon with corresponding amount is distributed to each process in the steel plant exists. And the amount of flue gas generated in the sintering process is far greater than that of flue gas generated in other processes, so that more activated carbon needs to be distributed to the sintering process in order to ensure the optimal adsorption effect of the flue gas purification device in the sintering process, the distribution amount needs to be determined according to the filling amount of an adsorption tower of the corresponding flue gas purification device or the activated carbon circulation flow corresponding to the sintering process, and the amount of activated carbon distributed to other processes is all the activated carbon left after being distributed to the sintering process.
Therefore, in order to achieve accurate distribution of activated carbon so that the multi-process flue gas purification system maintains a balanced cycle state, the distribution device 20 is required to distribute the activated carbon as required.
In this embodiment, the activated carbon centralized analysis and activation subsystem 2 further includes a material distribution device 20 located below the activated carbon bin 28; the material distribution device 20 includes a process discharge device 202 for distributing activated carbon for each process, and a sintering process discharge device 201 for distributing activated carbon for a sintering process.
Firstly, activated carbon is distributed to the flue gas purification device 4 in the sintering process in the steel plant by using the discharging device 201 in the sintering process, and the distributed amount of the activated carbon is determined according to the filling amount of an adsorption tower in the corresponding flue gas purification device or the circulation flow of the activated carbon corresponding to the sintering process.
In one specific embodiment, the amount of activated carbon distributed in the sintering process is determined according to the filling amount of the adsorption tower in the corresponding flue gas purification device.
In this example, the loading Q of the adsorption tower in the flue gas purification apparatus for the sintering processBurn 0Determined according to the following formula:
Qburn 0＝WX01×TBurn 0；
In the formula, QBurn 0The unit kg is the filling amount of the active carbon in the adsorption tower in the sintering process; wX01The activated carbon circulation flow of the flue gas purification device at the current moment t in the sintering process is unit kg/h; t isBurn 0The retention time of the activated carbon in the adsorption tower in the sintering process is 110-170, and the unit h is obtained; wherein the residence time TBurn 0And determining according to the smoke amount, the smoke flow rate and the like.
After the loading of the adsorption tower of the flue gas purification device corresponding to the sintering process is determined, the total discharge capacity of the discharging device in the sintering process can be determined, and the discharge flow W of the discharging device 201 in the sintering process in unit time can be further determinedUnloading 1。
In another specific embodiment, the amount of activated carbon dispensed in the sintering process is determined according to the activated carbon circulation flow rate corresponding to the sintering process.
Because the activated carbon discharged from the adsorption tower adsorbs pollutants, the weight of the activated carbon with the same volume can be increased by 3% -10%, namely the weight of the activated carbon in the same batch is 0.9-0.97% of the weight of the activated carbon after adsorbing the pollutants, so that when the theoretical activated carbon circulation flow corresponding to the flue gas purification device 4 in the sintering process is determined, the weight change coefficient j, namely the discharge flow W of the discharge device 201 in the sintering process is consideredUnloading 1Determined according to the following formula:
Wunloading 1＝WX01×j；
In the formula, j is a coefficient and has a value range of 0.9-0.97.
When the discharge flow rate of the discharging device 201 in the sintering process is determined, the discharge flow rates W of other processes are actually determinedUnloading 2Theoretical activated carbon circulation flow W of centralized analysis activation subsystem for activated carbonX0Discharge flow rate W of the discharging device 201 in the sintering processUnloading 1Difference, but in order to ensure continuous operation of the multi-process flue gas cleaning systemIn this embodiment, the discharge flow W of the process discharger 202 for distributing the activated carbon to the flue gas cleaning apparatus in each of the other processes is set to be highUnloading 2The material distributing device is set to be maximum so as to achieve the purpose of transporting a large amount of materials when storing a large amount of materials in the material distributing device.
In a third embodiment, a new activated carbon supplement device 29 can be further configured in the multi-process flue gas purification system provided in the second embodiment, specifically, as shown in fig. 10, the main control unit 100 is configured to perform the following steps to achieve precise control of the multi-process flue gas purification system:
s81, determining the activated carbon circulation flow W of the flue gas purification device in the sintering process corresponding to the current time tX01Determining tniThe activated carbon circulation flow W of the flue gas purification device in the working procedure n corresponding to the momentXn(tni)(ii) a And determining the supplementary flow W of the new activated carbon supplementary device for supplementing the new activated carbonSupplement device(ii) a Wherein n is the serial number of each procedure in the multi-procedure flue gas purification system; t is tni＝t-Tni，TniThe time for conveying the polluted activated carbon corresponding to the flue gas purification device at the moment i to the activated carbon centralized analysis and activation subsystem in the process n is shown;
s82, according to the activated carbon circulation flow W of the flue gas purification device in the step nXn(tni)Activated carbon circulation flow W of flue gas purification device in sintering processX01And a supplementary flow rate WSupplement deviceAnd determining the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time t according to the following formulaX0；
WX0＝∑WXn(t-Tni)+WSupplement device+WX01；
S83, according to the activated carbon circulation flow W of the activated carbon centralized analysis and activation subsystemX0Adjusting the discharge flow W of the belt weigherC(ii) a And, obtaining WC＝WX0-WX01Running frequency f of the belt scalec；
S84According to the operating frequency f of the belt scalecAdjusting the given frequency f of a feeding device in the active carbon centralized analysis and activation subsystemgAnd a given frequency f of the discharge devicepSo as to realize the control of the multi-process flue gas purification system.
The specific implementation process of the multi-process flue gas purification system provided in this embodiment can refer to the corresponding contents of the first embodiment and the second embodiment, and details are not described here.
The multiple operation gas cleaning system that this embodiment provided, the sintering process that will produce more flue gas is concentrated with the active carbon and is analyzed activation subsystem setting together, and the pollution active carbon that 4 gas cleaning device discharged in the sintering process can get into active carbon and concentrate analysis activation subsystem 2 with the fastest speed and analyze the activation, avoids carrying the time waste on the way, causes the system operating efficiency to reduce. When the operation parameters of the whole system are controlled according to the activated carbon circulation flow of the activated carbon centralized analysis and activation subsystem 2, the activated carbon circulation flow corresponding to the sintering process and the activated carbon circulation flow corresponding to other processes are fully considered, so that the given frequency f of the feeding device 22 of the analysis tower is controlledgA given frequency f of the discharge device 24pWith the operating frequency f of the belt scale 26cThe equal data is accurate so as to ensure the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystemX0The activated carbon circulation flow of the flue gas purification device corresponding to the sintering process and other processes is balanced, so that the whole multi-process flue gas purification system can be ensured to synchronously and stably run, and the running efficiency is optimal.
According to the multi-process flue gas purification system provided by the above embodiment, as shown in fig. 6, an embodiment of the present application provides a control method of a multi-process flue gas purification system, which is applied to the multi-process flue gas purification system provided by the above embodiment, and the control method includes the following steps:
s1, determining tniThe activated carbon circulation flow W of the flue gas purification device in the working procedure n corresponding to the momentXn(tni)(ii) a Wherein,n is the serial number of each procedure in the multi-procedure flue gas purification system; t is tni＝t-Tni，TniThe time for conveying the polluted activated carbon corresponding to the flue gas purification device at the moment i to the activated carbon centralized analysis and activation subsystem in the process n is shown;
s2, according to the activated carbon circulation flow W of the flue gas purification device in the step nXn(tni)Determining the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time tX0；
S3, according to the activated carbon circulation flow W of the activated carbon centralized analysis and activation subsystemX0Adjusting the discharge flow W of the belt weigherC(ii) a And, obtaining WC＝WX0Running frequency f of the belt scalec；
S4, according to the running frequency f of the belt scalecAdjusting the given frequency f of a feeding device in the active carbon centralized analysis and activation subsystemgAnd a given frequency f of the discharge devicepSo as to realize the control of the multi-process flue gas purification system.
Alternatively, as shown in FIG. 7, t is determined as followsniThe activated carbon circulation flow W of the flue gas purification device in the working procedure n corresponding to the momentXn(tni)：
S21, generating total amount V of raw flue gas in the production process according to the procedure nnAnd calculating t according to the following formulaniSO in the original flue gas corresponding to the time2And NOXTotal flow rate;
WSn(tni)＝Vn×CSn/106；
WNn(tni)＝Vn×CNn/106；
in the formula, WSn(tni)For the process n at tniSO in original flue gas corresponding to each moment2Total flow, unit kg/h; wNn(tni)For the process n at tniRaw cigarette corresponding to timeNO in gasXTotal flow, unit kg/h; cSnFor the process n at tniSO in original flue gas corresponding to each moment2Concentration in mg/Nm3；CNnFor the process n at tniNO in original smoke corresponding to timeXConcentration in mg/Nm3；
S22, according to SO in the raw flue gas2And NOXTotal flow, and the following equation, calculate tniThe activated carbon circulation flow W of the flue gas purification device in the working procedure n corresponding to the momentXn(tni)；
WXn(tni)＝K1×WSn(tni)+K2×WNn(tni)；
In the formula, WXn(tni)T corresponding to the flue gas purification device in the working procedure nniThe circulating flow of the activated carbon at the moment is unit kg/h; k1The coefficient is a first coefficient, and the value range is 15-21; k2The second coefficient is a value range of 3-5.
Optionally, the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time t is determinedX0Comprises the following steps:
according to the following formula, the activated carbon circulation flow W of the flue gas purification device in the working procedure n is determinedXn(tni)Determining the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time tX0；
WX0＝∑WXn(tni)＝∑WXn(t-Tni)；
Where T is the current time, TniAnd (4) conveying the polluted activated carbon corresponding to the flue gas purification device at the moment i to the activated carbon centralized analysis and activation subsystem in the process n.
Optionally, the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time t is determined according to the following stepsX0：
Determining the supplement flow W of the new active carbon supplement device for supplementing new active carbonSupplement deviceAccording to the supplement flow WSupplement deviceControlling the new active carbon supplementing device to supplement new active carbon into the total active carbon bin;
according to the activated carbon circulation flow W of the flue gas purification device in the working procedure nXn(tni)Supplement flow rate WSupplement deviceAnd determining the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time t according to the following formulaX0；
WX0＝∑WXn(t-Tni)+WSupplement device。
Alternatively, as shown in fig. 8, the supplementary flow rate W of the new activated carbon supplementary device for supplementing new activated carbon is determined as followsSupplement device：
According to the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystemX0Determining the filling quantity Q of the activated carbon in the desorption tower in the activated carbon centralized desorption and activation subsystem according to the following formula0；
Q0＝WX0×T0；
In the formula, Q0The filling amount of the activated carbon in unit kg in an analytic tower in an activated carbon centralized analysis and activation subsystem; t is0The retention time of the activated carbon in the desorption tower is 4-8, and the unit h;
detecting the actual active carbon material quantity Q of the active carbon bin in the active carbon centralized analysis and activation subsystemFruit of Chinese wolfberry；
According to the active carbon filling quantity Q of the desorption tower0And actual amount of activated carbon material QFruit of Chinese wolfberryAccording to formula QDecrease in the thickness of the steel＝Q0-QFruit of Chinese wolfberryDetermining the amount Q of the lost active carbon material after the active carbon is screened by the screening deviceDecrease in the thickness of the steel；
Controlling the amount Q of the supplementary activated carbon material of the new activated carbon supplementary deviceSupplement deviceAnd loss of activityAmount of charcoal material QDecrease in the thickness of the steelEqual according to the adjusted quantity Q of the supplementary activated carbonSupplement deviceDetermining the replenishment flow rate W of the new activated carbon for replenishment of the new activated carbon replenishment device per unit timeSupplement device。
Optionally, the operation frequency f of the belt scale is determined according to the following stepscAdjusting the given frequency f of a feeding device in the active carbon centralized analysis and activation subsystemgAnd a given frequency f of the discharge devicep：
Determining the discharge flow W of the belt scaleC＝Kc×fcDischarge flow W of the feeding deviceG＝Kg×fgDischarge flow W of discharge deviceP＝Kp×fp(ii) a In the formula, Kc, KgAnd KpAre all constants;
controlling the feeding device, the discharging device and the belt scale of the activated carbon centralized analysis and activation subsystem to have the same blanking flow so as to ensure that the W isG＝WP＝WC＝WX0；
According to the above formula, obtaining the given frequency f of the feeding devicegOperating frequency f of belt scalecSatisfies the following relation:according to the above formula and the running frequency f of the belt scalecAdjusting the given frequency f of the feeding deviceg(ii) a And the number of the first and second groups,
obtaining a given frequency f of the discharge devicepOperating frequency f of belt scalecSatisfies the following relation:according to the above formula and the running frequency f of the belt scalecAdjusting the given frequency f of the discharge devicep。
In a third aspect, according to the multi-process flue gas purification system provided in the foregoing embodiment, as shown in fig. 9, an embodiment of the present application provides a control method of a multi-process flue gas purification system, which is applied to the multi-process flue gas purification system provided in the foregoing embodiment, and the control method includes the following steps:
s71, determining the activated carbon circulation flow W of the flue gas purification device in the sintering process corresponding to the current time tX01(ii) a And, determining tniThe activated carbon circulation flow W of the flue gas purification device in the working procedure n corresponding to the momentXn(tni)(ii) a Wherein n is the serial number of each procedure in the multi-procedure flue gas purification system; t is tni＝t-Tni，TniThe time for conveying the polluted activated carbon corresponding to the flue gas purification device at the moment i to the activated carbon centralized analysis and activation subsystem in the process n is shown;
s72, according to the activated carbon circulation flow W of the flue gas purification device in the step nXn(tni)And the activated carbon circulation flow W of the flue gas purification device in the sintering processX01And determining the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time t according to the following formulaX0；
WX0＝∑WXn(t-Tni)+WX01；
S73, according to the activated carbon circulation flow W of the activated carbon centralized analysis and activation subsystemX0Adjusting the discharge flow W of the belt weigherC(ii) a And, obtaining WC＝WX0-WX01Running frequency f of the belt scalec；
S74, according to the running frequency f of the belt scalecAdjusting the given frequency f of a feeding device in the active carbon centralized analysis and activation subsystemgAnd a given frequency f of the discharge devicepSo as to realize the control of the multi-process flue gas purification system.
Optionally, the method further comprises:
according to the activated carbon circulation flow W of the flue gas purification device in the sintering processX01And formula WUnloading 1＝WX01Xj, determining the discharge flow W of the discharging device in the sintering processUnloading 1(ii) a Wherein j is a coefficient and has a value range of 0.9-0.97; and controlling the discharge flow W of the discharge device in the step nUnloading 2Is the largest.
In a fourth aspect, according to the multi-process flue gas purification system provided in the foregoing embodiment, as shown in fig. 10, an embodiment of the present application provides a control method of the multi-process flue gas purification system, which is applied to the multi-process flue gas purification system provided in the foregoing embodiment, and the control method includes the following steps:
s81, determining the activated carbon circulation flow W of the flue gas purification device in the sintering process corresponding to the current time tX01Determining tniThe activated carbon circulation flow W of the flue gas purification device in the working procedure n corresponding to the momentXn(tni)(ii) a And determining the supplementary flow W of the new activated carbon supplementary device for supplementing the new activated carbonSupplement device(ii) a Wherein n is the serial number of each procedure in the multi-procedure flue gas purification system; t is tni＝t-Tni，TniThe time for conveying the polluted activated carbon corresponding to the flue gas purification device at the moment i to the activated carbon centralized analysis and activation subsystem in the process n is shown;
s82, according to the activated carbon circulation flow W of the flue gas purification device in the step nXn(tni)Activated carbon circulation flow W of flue gas purification device in sintering processX01And a supplementary flow rate WSupplement deviceAnd determining the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time t according to the following formulaX0；
WX0＝∑WXn(t-Tni)+WSupplement device+WX01；
S83, according to the activated carbon circulation flow W of the activated carbon centralized analysis and activation subsystemX0Adjusting the discharge flow W of the belt weigherC(ii) a And, obtaining WC＝WX0-WX01Running frequency f of the belt scalec；
S84, conveying according to the belt scaleLine frequency fcAdjusting the given frequency f of a feeding device in the active carbon centralized analysis and activation subsystemgAnd a given frequency f of the discharge devicepSo as to realize the control of the multi-process flue gas purification system.
In a specific implementation, the present invention further provides a computer storage medium, where the computer storage medium may store a program, and the program may include some or all of the steps in each embodiment of the control method for a multi-process flue gas purification system provided by the present invention when executed. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM) or a Random Access Memory (RAM).
Those skilled in the art will readily appreciate that the techniques of the embodiments of the present invention may be implemented as software plus a required general purpose hardware platform. Based on such understanding, the technical solutions in the embodiments of the present invention may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.
The same and similar parts in the various embodiments in this specification may be referred to each other. In particular, for the embodiment of the control method of the multi-process flue gas purification system, since it is basically similar to the embodiment of the multi-process flue gas purification system, the description is simple, and the relevant points can be referred to the description in the embodiment of the multi-process flue gas purification system.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention.
Claims (11)
1. A multiple process flue gas purification system, comprising: the system comprises an active carbon centralized analysis and activation subsystem, an active carbon conveying subsystem and flue gas purification devices corresponding to all working procedures, wherein each flue gas purification device is respectively connected with the active carbon centralized analysis and activation subsystem through the active carbon conveying subsystem; wherein,
the active carbon centralized analysis and activation subsystem comprises an analysis tower, a feeding device, a discharging device, a screening device, an active carbon bin, a total active carbon bin, a belt scale and a new active carbon supplementing device, wherein the feeding device is used for controlling the flow of the polluted active carbon entering the analysis tower, the discharging device is used for discharging the activated active carbon after activation treatment in the analysis tower, the screening device is used for screening the activated active carbon discharged by the discharging device, the active carbon bin is used for collecting the activated active carbon obtained after the activated active carbon passes through the screening device, the total active carbon bin is arranged between the outlet end of a flue gas purification device corresponding to each process and the feeding device, the total active carbon bin is used for collecting the polluted active carbon discharged by the flue gas purification device in each process, the belt scale is arranged between the total active carbon bin and the feeding device, the belt scale is used for conveying the polluted active carbon in the total active carbon bin to the analysis tower, and the new active carbon supplementing device is arranged, the new active carbon supplementing device is used for supplementing new active carbon into the total active carbon bin.
2. The system of claim 1, further comprising: the flue gas purification device is arranged corresponding to the sintering process of the activated carbon centralized analysis and activation subsystem, and the material distribution device is positioned below the activated carbon bin; the polluted active carbon discharged by the flue gas purification device corresponding to the sintering procedure is sent into the desorption tower through the active carbon conveying subsystem and the feeding device;
the material distributing device comprises a process n discharging device used for distributing activated carbon for each process and a sintering process discharging device used for distributing the activated carbon for the sintering process.
3. A control method of a multi-process flue gas purification system is characterized by comprising the following steps:
determining tniThe activated carbon circulation flow W of the flue gas purification device in the working procedure n corresponding to the momentXn(tni)(ii) a Wherein n is the serial number of each procedure in the multi-procedure flue gas purification system; t is tni＝t-Tni，TniThe time for conveying the polluted activated carbon corresponding to the flue gas purification device at the moment i to the activated carbon centralized analysis and activation subsystem in the process n is shown;
according to the activated carbon circulation flow W of the flue gas purification device in the working procedure nXn(tni)Determining the active carbon centralized analysis activation subsystem corresponding to the current time tSystemic activated carbon circulation flow WX0；
According to the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystemX0Adjusting the discharge flow W of the belt weigherC(ii) a And, obtaining WC＝WX0Running frequency f of the belt scalec；
According to the operating frequency f of the belt scalecAdjusting the given frequency f of a feeding device in the active carbon centralized analysis and activation subsystemgAnd a given frequency f of the discharge devicepSo as to realize the control of the multi-process flue gas purification system.
4. A method according to claim 3, characterized in that t is determined according to the following stepsniThe activated carbon circulation flow W of the flue gas purification device in the working procedure n corresponding to the momentXn(tni)：
The total amount of raw flue gas V generated in the production process according to the procedure nnAnd calculating t according to the following formulaniSO in the original flue gas corresponding to the time2And NOXTotal flow rate;
WSn(tni)＝Vn×CSn/106；
WNn(tni)＝Vn×CNn/106；
in the formula, WSn(tni)For the process n at tniSO in original flue gas corresponding to each moment2Total flow, unit kg/h; wNn(tni)For the process n at tniNO in original smoke corresponding to timeXTotal flow, unit kg/h; cSnFor the process n at tniSO in original flue gas corresponding to each moment2Concentration in mg/Nm3；CNnFor the process n at tniNO in original smoke corresponding to timeXConcentration in mg/Nm3；
According to SO in the raw flue gas2And NOXTotal flow, and the following equation, calculate tniThe activated carbon circulation flow W of the flue gas purification device in the working procedure n corresponding to the momentXn(tni)；
WXn(tni)＝K1×WSn(tni)+K2×WNn(tni)；
In the formula, WXn(tni)T corresponding to the flue gas purification device in the working procedure nniThe circulating flow of the activated carbon at the moment is unit kg/h; k1The coefficient is a first coefficient, and the value range is 15-21; k2The second coefficient is a value range of 3-5.
5. The method according to claim 3, wherein the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time t is determined according to the following stepsX0：
According to the following formula, the activated carbon circulation flow W of the flue gas purification device in the working procedure n is determinedXn(tni)Determining the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time tX0；
WX0＝∑WXn(tni)＝∑WXn(t-Tni)；
Where T is the current time, TniAnd (4) conveying the polluted activated carbon corresponding to the flue gas purification device at the moment i to the activated carbon centralized analysis and activation subsystem in the process n.
6. The method according to claim 3, wherein the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time t is determined according to the following stepsX0：
Determining the supplement flow W of the new active carbon supplement device for supplementing the new active carbonSupplement deviceAccording to the supplement flow WSupplement deviceControlling the new active carbon supplementing device to supplement new active carbon into the total active carbon bin;
according to the activated carbon circulation flow W of the flue gas purification device in the working procedure nXn(tni)Supplement flow rate WSupplement deviceAnd determining the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time t according to the following formulaX0；
WX0＝∑WXn(t-Tni)+WSupplement device。
7. The method of claim 6, wherein the supplementary flow rate W of the new activated carbon for the new activated carbon supplementary device is determined according to the following stepsSupplement device：
According to the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystemX0Determining the filling quantity Q of the activated carbon in the desorption tower in the activated carbon centralized desorption and activation subsystem according to the following formula0；
Q0＝WX0×T0；
In the formula, Q0The filling amount of the activated carbon in unit kg in an analytic tower in an activated carbon centralized analysis and activation subsystem; t is0The retention time of the activated carbon in the desorption tower is 4-8, and the unit h;
detecting the actual active carbon material quantity Q of the active carbon bin in the active carbon centralized analysis and activation subsystemFruit of Chinese wolfberry；
According to the active carbon filling quantity Q of the desorption tower0And actual amount of activated carbon material QFruit of Chinese wolfberryAccording to formula QDecrease in the thickness of the steel＝Q0-QFruit of Chinese wolfberryDetermining the amount Q of the lost active carbon material after the active carbon is screened by the screening deviceDecrease in the thickness of the steel；
Controlling the amount Q of the supplementary activated carbon material of the new activated carbon supplementary deviceSupplement deviceWith the amount of lost active carbon material QDecrease in the thickness of the steelEqual according to the adjusted quantity Q of the supplementary activated carbonSupplement deviceDetermining the replenishment flow rate W of the new activated carbon for replenishment of the new activated carbon replenishment device per unit timeSupplement device。
8. Method according to claim 3, characterized in that the operating frequency f of the belt scale is determined according to the following stepscAdjusting the given frequency f of a feeding device in the active carbon centralized analysis and activation subsystemgAnd a given frequency f of the discharge devicep：
Determining the discharge flow W of the belt scaleC＝Kc×fcDischarge flow W of the feeding deviceG＝Kg×fgDischarge flow W of discharge deviceP＝Kp×fp(ii) a In the formula, Kc, KgAnd KpAre all constants;
controlling the feeding device, the discharging device and the belt scale of the activated carbon centralized analysis and activation subsystem to have the same blanking flow so as to ensure that the W isG＝WP＝WC＝WX0；
According to the above formula, obtaining the given frequency f of the feeding devicegOperating frequency f of belt scalecSatisfies the following relation:according to the above formula and the running frequency f of the belt scalecAdjusting the given frequency f of the feeding deviceg(ii) a And the number of the first and second groups,
obtaining a given frequency f of the discharge devicepOperating frequency f of belt scalecSatisfies the following relation:according to the above formula and the running frequency f of the belt scalecAdjusting the given frequency f of the discharge devicep。
9. A control method of a multi-process flue gas purification system is characterized by comprising the following steps:
determining the activated carbon circulation flow W of the flue gas purification device in the sintering procedure corresponding to the current time tX01(ii) a And, determining tniThe activated carbon circulation flow W of the flue gas purification device in the working procedure n corresponding to the momentXn(tni)(ii) a Wherein n is the serial number of each procedure in the multi-procedure flue gas purification system; t is tni＝t-Tni，TniThe time for conveying the polluted activated carbon corresponding to the flue gas purification device at the moment i to the activated carbon centralized analysis and activation subsystem in the process n is shown;
according to the activated carbon circulation flow W of the flue gas purification device in the working procedure nXn(tni)And sinteringActivated carbon circulation flow W of flue gas purification device in working procedureX01And determining the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time t according to the following formulaX0；
WX0＝∑WXn(t-Tni)+WX01；
According to the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystemX0Adjusting the discharge flow W of the belt weigherC(ii) a And, obtaining WC＝WX0-WX01Running frequency f of the belt scalec；
According to the operating frequency f of the belt scalecAdjusting the given frequency f of a feeding device in the active carbon centralized analysis and activation subsystemgAnd a given frequency f of the discharge devicepSo as to realize the control of the multi-process flue gas purification system.
10. The method of claim 9, further comprising:
according to the activated carbon circulation flow W of the flue gas purification device in the sintering processX01And formula WUnloading 1＝WX01Xj, determining the discharge flow W of the discharging device in the sintering processUnloading 1(ii) a Wherein j is a coefficient and has a value range of 0.9-0.97; and controlling the discharge flow W of the discharge device in the step nUnloading 2Is the largest.
11. A control method of a multi-process flue gas purification system is characterized by comprising the following steps:
determining the activated carbon circulation flow W of the flue gas purification device in the sintering procedure corresponding to the current time tX01Determining tniThe activated carbon circulation flow W of the flue gas purification device in the working procedure n corresponding to the momentXn(tni)(ii) a And determining the supplementary flow W of the new activated carbon supplementary device for supplementing the new activated carbonSupplement device(ii) a Wherein n is the serial number of each procedure in the multi-procedure flue gas purification system; t is tni＝t-Tni，TniFor the flue gas purification device in the working procedure n at the moment iThe corresponding time for transporting the polluted activated carbon to the activated carbon centralized analysis and activation subsystem;
according to the activated carbon circulation flow W of the flue gas purification device in the working procedure nXn(tni)Activated carbon circulation flow W of flue gas purification device in sintering processX01And a supplementary flow rate WSupplement deviceAnd determining the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystem corresponding to the current time t according to the following formulaX0；
WX0＝∑WXn(t-Tni)+WSupplement device+WX01；
According to the activated carbon circulation flow W of the activated carbon centralized analysis activation subsystemX0Adjusting the discharge flow W of the belt weigherC(ii) a And, obtaining WC＝WX0-WX01Running frequency f of the belt scalec；
According to the operating frequency f of the belt scalecAdjusting the given frequency f of a feeding device in the active carbon centralized analysis and activation subsystemgAnd a given frequency f of the discharge devicepSo as to realize the control of the multi-process flue gas purification system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810084374.4A CN108295621B (en) | 2018-01-29 | 2018-01-29 | A kind of multi-process flue gas purification system and its control method |
| MYPI2020002559A MY193803A (en) | 2018-01-29 | 2018-04-18 | Multi-process flue gas purification system and method for controlling the same |
| PCT/CN2018/083579 WO2019144523A1 (en) | 2018-01-29 | 2018-04-18 | Multi-process flue gas purification system and method for controlling same |
| RU2020122728A RU2762190C1 (en) | 2018-01-29 | 2018-04-18 | Multi-process exhaust gas cleaning system and a method for controlling this system |
| BR112020011458-8A BR112020011458B1 (en) | 2018-01-29 | 2018-04-18 | MULTI-PROCESS FLUE GAS PURIFICATION SYSTEM AND METHOD FOR CONTROLLING THE SAME |
| KR1020207012434A KR102343392B1 (en) | 2018-01-29 | 2018-04-18 | Multi-process flue gas purification system and its control method |
| PH12020550665A PH12020550665A1 (en) | 2018-01-29 | 2020-05-20 | Multi-process flue gas purification system and method for controlling the same |
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| CN111249857A (en) * | 2019-07-04 | 2020-06-09 | 广东澄宇实业有限公司 | VOC exhaust-gas treatment purifier and have its baking finish room |
| CN110180324B (en) * | 2019-07-04 | 2023-11-24 | 广东澄宇实业有限公司 | Air purifying device and purifying method |
| CN112742162A (en) * | 2019-10-31 | 2021-05-04 | 中冶长天国际工程有限责任公司 | Material balance control method, device and system for analytic system |
| CN112742162B (en) * | 2019-10-31 | 2022-06-07 | 中冶长天国际工程有限责任公司 | Material balance control method, device and system for analytic system |
| CN114733326A (en) * | 2022-05-09 | 2022-07-12 | 北京市科学技术研究院资源环境研究所 | Organic waste gas treatment monitoring method and device of waste gas discharge equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019144523A1 (en) | 2019-08-01 |
| PH12020550665A1 (en) | 2021-04-26 |
| CN108295621B (en) | 2019-07-12 |
| KR20200058529A (en) | 2020-05-27 |
| RU2762190C1 (en) | 2021-12-16 |
| KR102343392B1 (en) | 2021-12-27 |
| BR112020011458A2 (en) | 2020-12-01 |
| MY193803A (en) | 2022-10-27 |
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