CN207822767U - A kind of heat-engine plant wet desulfurization outlet SO2 emission control circuits - Google Patents
A kind of heat-engine plant wet desulfurization outlet SO2 emission control circuits Download PDFInfo
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- CN207822767U CN207822767U CN201721917609.0U CN201721917609U CN207822767U CN 207822767 U CN207822767 U CN 207822767U CN 201721917609 U CN201721917609 U CN 201721917609U CN 207822767 U CN207822767 U CN 207822767U
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- heat
- emission control
- control circuits
- wet desulfurization
- cems
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 24
- 230000023556 desulfurization Effects 0.000 title claims abstract description 23
- 238000010521 absorption reaction Methods 0.000 claims abstract description 20
- 239000002002 slurry Substances 0.000 claims abstract description 20
- 238000000738 capillary electrophoresis-mass spectrometry Methods 0.000 claims abstract description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 8
- 239000003546 flue gas Substances 0.000 abstract description 8
- 238000000151 deposition Methods 0.000 abstract description 4
- 238000010926 purge Methods 0.000 abstract description 4
- 230000004044 response Effects 0.000 abstract description 3
- 206010037544 Purging Diseases 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 abstract description 2
- 230000009102 absorption Effects 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000009955 starching Methods 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 210000002966 serum Anatomy 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model provides a kind of heat-engine plant wet desulfurization outlet SO2 emission control circuits, including PID controller, digital filter device, calculator；The PID controller, calculator, digital filter device are sequentially connected, and digital filter device accesses to CEMS, and PID connections are controlled for slurry valve.The utility model is greatly facilitated changes feedforward control using unit load and SO_2 in flue gas variation feedforward and absorption tower PH, to solve the problems, such as absorption tower response lag；The tracking pH value variation solution CEMS when exporting CEMS purgings is contributed to purge the influence brought；It is easy to implement the holding valve minimum aperture when automatically engaging, prevents pipeline from depositing or blocking and absorption tower pH value goes beyond the scope and exits automatic alarm, operating personnel is reminded to adjust pH value in time, final realize automatically controls optimization.
Description
Technical field
The utility model is related to a kind of heat-engine plant wet desulfurization to export SO2 emission control circuits.
Background technology
It is domestic at present that there is desulfuration efficiency height using very ripe wet desulfurization of flue gas by limestone-gypsum method, adapt to coal
Extensively, desulfurizing agent is cheap and purchases the features such as convenient, technology maturation is reliable and device is stable, which is suitable for
Different type, the power plant boiler of different size and other coal-burning boilers, and the widest desulfurization work of domestic and international application at present
Skill (account for all sulfur removal technologies 90% or so).Wet processing when operating mode is more stable (serum recycle pump operation number of units, desulfurization into
Mouth SO2 concentration of flue gas and import exhaust gas volumn are more stable) mainly absorption tower PH is controlled by adjusting the stock volume into absorption tower
Value exports SO2 concentration to achieve the purpose that control desulfurization, this process needs operating personnel frequently to adjust stock volume, and is easy
Cause the short time discharge beyond standards of outlet SO2 concentration.
To sum up, wet desulfurization system automatically controls desulfurization outlet SO2 concentration of emissions at present, is primarily present following difficulty
Point：
(1) absorption tower desulphurization reaction is a larger reaction process of delay, desulfurization export SO2 concentration-response lag times compared with
It is long, bring difficulty to automatically controlling；
(2) desulfurization outlet SO2 measuring systems (i.e. CEMS, smoke on-line monitoring system) need periodically to carry out blowback, blowback
When generally outlet SO2 concentration remain unchanged, this section of time inner outlet SO2 concentration is not true SO2 concentration of emissions, to outlet
The automatic track band of SO2 is next difficult, easily causes outlet SO2 and substantially vibrates；
(3) absorption tower pH value needs to control in a relatively reasonable range, to ensure desulphurization reaction in absorption tower
Efficiently, and the purity of guarantee gypsum, SO2 discharges automatically control the control for needing to take into account absorption tower pH value.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of heat-engine plant wet desulfurization outlet SO2 emission controls
Circuit, heat-engine plant wet desulfurization outlet SO2 emission control circuits pass through
The utility model is achieved by the following technical programs.
A kind of heat-engine plant wet desulfurization outlet SO2 emission control circuits provided by the utility model, including PID controller,
Digital filter device, calculator；The PID controller, calculator, digital filter device are sequentially connected, and digital filter device accesses to
CEMS, PID connection control are for slurry valve.
It is described for slurry valve include first for slurry valve and second for slurry valve.
The PID controller is also connected with control absorption tower.
It is connected between the PID and CEMS.
The calculator is variable Rate calculator.
The digital filter device is one order inertia filter.
The beneficial effects of the utility model are：Greatly facilitate using unit load and SO_2 in flue gas variation feedforward and
Absorption tower PH changes feedforward control, to solve the problems, such as absorption tower response lag；Help to track when exporting CEMS purgings
PH value variation solves CEMS and purges the influence brought；It is easy to implement the holding valve minimum aperture when automatically engaging, prevents pipeline
Deposition or blocking and absorption tower pH value go beyond the scope and exit automatic alarm, and operating personnel is reminded to adjust pH value in time, final real
Now automatically control optimization.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model.
Specific implementation mode
Be described further below the technical solution of the utility model, but claimed range be not limited to it is described.
A kind of heat-engine plant wet desulfurization as shown in Figure 1 exports SO2 emission control circuits, including the filter of PID controller, inertia
Wave device, calculator；The PID controller, calculator, digital filter device are sequentially connected, and digital filter device accesses to CEMS, PID
Connection control is for slurry valve.
It is described for slurry valve include first for slurry valve and second for slurry valve.
The PID controller is also connected with control absorption tower.
It is connected between the PID and CEMS.
The calculator is variable Rate calculator.
The digital filter device is one order inertia filter.
The utility model is simply adjusted by the later stage as a result, and code write-in can easily realize purpose control as follows：
1, desulfurization exports SO2 concentration after one order inertia is filtered, and setting SO2 concentration carries out deviation operation, is sent into PID
Controller, calculate for starch pitch aperture, export respectively to 2 for starch pitch, 2 for slurry pitch provided with ± 20% it is inclined
Surplus is set, new, old two-way stock volume is adjusted for operations staff；
2, it is to solve the problems, such as absorption tower desulphurization reaction lag delay, takes feedforward control：Unit load and SO_2 in flue gas
Variation feedforward, SO_2 in flue gas, which is multiplied with flue gas flow after one order inertia filter, carries out variable Rate calculating, the PID that is added to fortune
Output is calculated for starching in pitch elementary instruction, to for slurry when to realize the quick load increase and decrease of unit and SO_2 in flue gas significantly change
Pitch is controlled in advance；Absorption tower PH variation feedforwards, 2, absorption tower PH signals, which first pass through, to be filtered, and is become after processing
Rate calculations, the PID arithmetic that is added to output is in slurry pitch elementary instruction.Feedforward instruction is constant when PH counts flushing gate unlatching,
PH value is distorted the influence brought when being rinsed with eliminating；
3, to solve the influence that outlet SO2 is kept in CEMS blowbacks, within the CEMS blowback times, master controller keeps defeated
Go out constant, pitch instruction trace absorption tower pH value at this time, pH value be multiplied by after variable Rate calculating the original that is added to after amplification coefficient
In controller instruction, output realizes that pitch when blowback automatically controls to for starching pitch；
4, due to the anti-deposition of slurries pipeline and anti-clogging feature, it is unable to Close All for slurry pitch when automatically engaging, is needed
A minimum discharge is kept, according to scene for starching pitch characteristic, 20% is limited in for slurry pitch minimum aperture when automatically engaging,
To prevent pipeline from depositing or block, while it can prevent slurry supply pump from making bored pump；
5, it is to ensure absorption tower pH value in the reasonable scope, is more than that setting range backed off after random is automatic in pH value, is simultaneously emitted by
Warning reminding operating personnel adjust pH value in time.
Claims (6)
1. a kind of heat-engine plant wet desulfurization exports SO2 emission control circuits, including PID controller, digital filter device, calculator,
It is characterized in that：The PID controller, calculator, digital filter device are sequentially connected, and digital filter device accesses to CEMS, and PID connects
Control is connect for slurry valve.
2. heat-engine plant wet desulfurization as described in claim 1 exports SO2 emission control circuits, it is characterised in that：It is described for slurry
Valve include first for slurry valve and second for slurry valve.
3. heat-engine plant wet desulfurization as described in claim 1 exports SO2 emission control circuits, it is characterised in that：The PID controls
Device processed is also connected with control absorption tower.
4. heat-engine plant wet desulfurization as described in claim 1 exports SO2 emission control circuits, it is characterised in that：The PID and
It is connected between CEMS.
5. heat-engine plant wet desulfurization as described in claim 1 exports SO2 emission control circuits, it is characterised in that：The calculating
Device is variable Rate calculator.
6. heat-engine plant wet desulfurization as described in claim 1 exports SO2 emission control circuits, it is characterised in that：The inertia
Filter is one order inertia filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721917609.0U CN207822767U (en) | 2017-12-29 | 2017-12-29 | A kind of heat-engine plant wet desulfurization outlet SO2 emission control circuits |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721917609.0U CN207822767U (en) | 2017-12-29 | 2017-12-29 | A kind of heat-engine plant wet desulfurization outlet SO2 emission control circuits |
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| Publication Number | Publication Date |
|---|---|
| CN207822767U true CN207822767U (en) | 2018-09-07 |
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| CN201721917609.0U Active CN207822767U (en) | 2017-12-29 | 2017-12-29 | A kind of heat-engine plant wet desulfurization outlet SO2 emission control circuits |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109101049A (en) * | 2018-10-26 | 2018-12-28 | 马鞍山当涂发电有限公司 | A kind of desulfuration absorbing tower pH value is exchanged work frequency hybrid control system and method |
| CN110479053A (en) * | 2019-09-12 | 2019-11-22 | 华电国际电力股份有限公司邹县发电厂 | It is a kind of list pid loop add feed-forward regulation desulfurization for starch flow device and control method |
| CN111068503A (en) * | 2019-12-17 | 2020-04-28 | 浙江天地环保科技有限公司 | Limestone slurry supply accurate adjustment controller and control method for desulfurization system after ultralow emission of flue gas |
| CN111111392A (en) * | 2019-12-30 | 2020-05-08 | 杭州电子科技大学 | The method of on-line automatic control of SO2 concentration during backflushing of CEMS meter in power plant |
| CN112206645A (en) * | 2019-07-10 | 2021-01-12 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Thermal power plant desulfurization efficiency control method and system |
| CN112206640A (en) * | 2020-09-16 | 2021-01-12 | 西安热工研究院有限公司 | Limestone slurry pH value concentration fly-up detection system, method, control system and desulfurization system |
| CN112791567A (en) * | 2020-12-25 | 2021-05-14 | 上海曜中能源科技有限公司 | Automatic speed regulating system of wet desulphurization slurry pump and control method |
| CN113058417A (en) * | 2021-04-15 | 2021-07-02 | 大唐环境产业集团股份有限公司 | Control device suitable for restraining pH fluctuation of carbide slag flue gas desulfurization slurry |
-
2017
- 2017-12-29 CN CN201721917609.0U patent/CN207822767U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109101049A (en) * | 2018-10-26 | 2018-12-28 | 马鞍山当涂发电有限公司 | A kind of desulfuration absorbing tower pH value is exchanged work frequency hybrid control system and method |
| CN109101049B (en) * | 2018-10-26 | 2020-11-24 | 马鞍山当涂发电有限公司 | Desulfurization absorption tower pH value-to-power frequency hybrid control system and method |
| CN112206645A (en) * | 2019-07-10 | 2021-01-12 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Thermal power plant desulfurization efficiency control method and system |
| CN112206645B (en) * | 2019-07-10 | 2022-10-04 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Thermal power plant desulfurization efficiency control method and system |
| CN110479053A (en) * | 2019-09-12 | 2019-11-22 | 华电国际电力股份有限公司邹县发电厂 | It is a kind of list pid loop add feed-forward regulation desulfurization for starch flow device and control method |
| CN111068503A (en) * | 2019-12-17 | 2020-04-28 | 浙江天地环保科技有限公司 | Limestone slurry supply accurate adjustment controller and control method for desulfurization system after ultralow emission of flue gas |
| CN111111392A (en) * | 2019-12-30 | 2020-05-08 | 杭州电子科技大学 | The method of on-line automatic control of SO2 concentration during backflushing of CEMS meter in power plant |
| CN112206640A (en) * | 2020-09-16 | 2021-01-12 | 西安热工研究院有限公司 | Limestone slurry pH value concentration fly-up detection system, method, control system and desulfurization system |
| CN112206640B (en) * | 2020-09-16 | 2022-08-19 | 西安热工研究院有限公司 | System and method for detecting pH value and concentration of limestone slurry in flying manner, control system and desulfurization system |
| CN112791567A (en) * | 2020-12-25 | 2021-05-14 | 上海曜中能源科技有限公司 | Automatic speed regulating system of wet desulphurization slurry pump and control method |
| CN113058417A (en) * | 2021-04-15 | 2021-07-02 | 大唐环境产业集团股份有限公司 | Control device suitable for restraining pH fluctuation of carbide slag flue gas desulfurization slurry |
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