CN106556028A - A kind of coal unit boiler combustion runs comprehensive optimization system with denitration - Google Patents
A kind of coal unit boiler combustion runs comprehensive optimization system with denitration Download PDFInfo
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- CN106556028A CN106556028A CN201510621092.XA CN201510621092A CN106556028A CN 106556028 A CN106556028 A CN 106556028A CN 201510621092 A CN201510621092 A CN 201510621092A CN 106556028 A CN106556028 A CN 106556028A
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- denitration
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- operation oxygen
- air quantity
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Abstract
The present invention relates to a kind of coal unit boiler combustion runs comprehensive optimization system with denitration, including：Burning unit Load obtaining module, for receiving the load of burning unit to be optimized；NOx discharge computing module, for burning air quantity and the corresponding NOx discharge of operation oxygen amount calculating according to the load of burning unit to be optimized and the multigroup of setting, forms combustion parameter control table；Optimal result output module, for obtaining the minimum NOx discharge under current loads, and exports the corresponding air quantity that burns with operation oxygen amount；Air quantity control module is burnt, for receiving the air quantity that burns of optimal result output module output, and the first control signal that control burns throttle opening is generated；Operation oxygen content control module, for receiving the operation oxygen amount of optimal result output module output, and generates the second control signal that control enters the operation oxygen amount of burning unit.Compared with prior art, the present invention has the advantages that to reduce the discharge of NOx, reduces denitration cost.
Description
Technical field
The present invention relates to thermal power plant combustion control technology, more particularly, to a kind of coal unit boiler combustion with
Denitration runs comprehensive optimization system.
Background technology
, with the development of China's power industry, the discharge capacity of NOx is all with day for the escaping of ammonia problem of flue gas denitrification system
Increasing, the NOx produced pollution and its impact increasingly cause the concern of people.Existing denitration technology scheme one
As be：Newly-built 2 units all adopt low NO, 1 installation denitrification apparatus, another 1 reserved glue ammonium nitrate
Holding position, denitration efficiency are not less than 80% in principle, and catalyst module is considered by 2 layers+1 layer reserved layer.But should
Method is relatively costly.With continuous improvement of the country to environmental requirement and the increase of fuel cost, thermal power plant
Itself economic performance must more be focused on the premise of environmental protection and safety is ensured, ensure electricity by improving economy
The profitability of factory.Accordingly, it would be desirable to studying one kind can effectively reduce NOx's under existing denitrating system environment
Discharge, so as to reduce the optimisation technique of denitration cost.
The content of the invention
The purpose of the present invention is exactly to provide one kind and can reduce to overcome the defect of above-mentioned prior art presence
The discharge of NOx, the coal unit boiler combustion and denitration operation comprehensive optimization system for reducing denitration cost.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of coal unit boiler combustion runs comprehensive optimization system with denitration, including：
Burning unit Load obtaining module, for receiving the load of burning unit to be optimized；
NOx discharge computing module, for being burnt according to the load of burning unit to be optimized and the multigroup of setting
Air quantity and operation oxygen amount calculate corresponding NOx discharge, form combustion parameter control table；
Optimal result output module, for obtaining minimum under current loads according to the combustion parameter control table
NOx discharge, and the corresponding air quantity that burns is exported with operation oxygen amount；
Air quantity control module is burnt, and air quantity is burnt for receive the output of optimal result output module, and is generated control
Burn the first control signal of throttle opening；
Operation oxygen content control module, for receiving the operation oxygen amount of optimal result output module output, and generates control
Into the second control signal of the operation oxygen amount of burning unit.
The load of the burning unit includes 1000MW, 700MW, 450MW or 400MW.
The air door that burns includes SOFA air doors and/or CCOFA air doors.
First control signal includes that increase burns throttle opening or increases burnt wind gate layer number.
Second control signal includes reducing operation oxygen amount.
Compared with prior art, the invention has the advantages that：
1st, NOx discharge is effectively reduced, denitration cost is reduced：After the burning optimization of present system, take off
Nitre device portal NOx concentration is from 255mg/m3@6%O2It is reduced to 150～160mg/m3@6%O2, it is ensured that volume
Determine under operating mode, SCR inlet nitrous oxides concentration is not more than 200mg/Nm3。
2nd, ammonia slip concentration is reduced：Through present system burning optimization and spray ammonia adjustment after, the escaping of ammonia from
2.55 μ L/L@6%O2It is reduced to 0.5 μ L/L@6%O2, reduce system ammonia slip concentration.
Specific embodiment
With reference to specific embodiment, the present invention is described in detail.The present embodiment is with technical solution of the present invention as front
Carry and being implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited
In following embodiments.
The present embodiment provides a kind of coal unit boiler combustion and runs comprehensive optimization system with denitration, including：
Burning unit Load obtaining module, for receiving the load of burning unit to be optimized, the burning unit
Load includes 1000MW, 700MW, 450MW, 400MW etc.；
NOx discharge computing module, for being burnt according to the load of burning unit to be optimized and the multigroup of setting
Air quantity and operation oxygen amount calculate corresponding NOx discharge, form combustion parameter control table；
Optimal result output module, for obtaining minimum under current loads according to the combustion parameter control table
NOx discharge, and the corresponding air quantity that burns is exported with operation oxygen amount；
Air quantity control module is burnt, and air quantity is burnt for receive the output of optimal result output module, and is generated control
The first control signal of throttle opening is burnt, the air door that burns includes SOFA air doors and/or CCOFA air doors,
First control signal includes that increase burns throttle opening or increases burnt wind gate layer number etc.；
Operation oxygen content control module, for receiving the operation oxygen amount of optimal result output module output, and generates control
Into the second control signal of the operation oxygen amount of burning unit, second control signal includes reducing operation oxygen amount
Deng.
Comprehensive optimization system is run by above-mentioned coal unit boiler combustion and denitration and obtains combustion parameter control table, and
Control signal is generated according to the combustion parameter control table to be controlled Actual combustion unit, it is specific as follows：
1) under 1000MW loads, (increased by suitably reducing oxygen amount (reducing by 0.3%) and increasing combustion air quantity
Open one layer of SOFA), NOx emission (about reducing 10%～20%) is effectively reduced, boiler efficiency has risen,
Vapor (steam) temperature is not reduced.
2) under 700MW loads, by suitably reducing oxygen amount (reducing by 0.3%～0.6%) and increasing combustion wind
Amount (increases SOFA throttle openings), is effectively reduced NOx emission (about reducing 10%～20%), boiler efficiency
Rise, vapor (steam) temperature is not reduced.
3) under 450MW and 400MW loads, reduced can NOx emission by reducing oxygen amount, but
Its effect substantially weakens compared with high load capacity.The reproducible decline of NOx emission was not observed after increasing combustion air quantity.
Claims (5)
1. a kind of coal unit boiler combustion runs comprehensive optimization system with denitration, it is characterised in that include：
Burning unit Load obtaining module, for receiving the load of burning unit to be optimized；
NOx discharge computing module, for being burnt according to the load of burning unit to be optimized and the multigroup of setting
Air quantity and operation oxygen amount calculate corresponding NOx discharge, form combustion parameter control table；
Optimal result output module, for obtaining minimum under current loads according to the combustion parameter control table
NOx discharge, and the corresponding air quantity that burns is exported with operation oxygen amount；
Air quantity control module is burnt, and air quantity is burnt for receive the output of optimal result output module, and is generated control
Burn the first control signal of throttle opening；
Operation oxygen content control module, for receiving the operation oxygen amount of optimal result output module output, and generates control
Into the second control signal of the operation oxygen amount of burning unit.
2. coal unit boiler combustion according to claim 1 runs comprehensive optimization system with denitration, and which is special
Levy and be, the load of the burning unit includes 1000MW, 700MW, 450MW or 400MW.
3. coal unit boiler combustion according to claim 1 runs comprehensive optimization system with denitration, and which is special
Levy and be, the air door that burns includes SOFA air doors and/or CCOFA air doors.
4. coal unit boiler combustion according to claim 1 runs comprehensive optimization system with denitration, and which is special
Levy and be, first control signal includes that increase burns throttle opening or increases burnt wind gate layer number.
5. coal unit boiler combustion according to claim 1 runs comprehensive optimization system with denitration, and which is special
Levy and be, second control signal includes reducing operation oxygen amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510621092.XA CN106556028A (en) | 2015-09-25 | 2015-09-25 | A kind of coal unit boiler combustion runs comprehensive optimization system with denitration |
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| CN201510621092.XA CN106556028A (en) | 2015-09-25 | 2015-09-25 | A kind of coal unit boiler combustion runs comprehensive optimization system with denitration |
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| CN106556028A true CN106556028A (en) | 2017-04-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113587139A (en) * | 2021-07-29 | 2021-11-02 | 苏州西热节能环保技术有限公司 | Method for controlling NOx generation concentration in deep peak-load-reducing process |
| CN113701187A (en) * | 2021-08-04 | 2021-11-26 | 苏州西热节能环保技术有限公司 | Method for controlling opening degree of burnout air door and storage medium thereof |
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| GB2443551B (en) * | 2006-11-02 | 2011-08-24 | Gen Electric | Systems to increase efficiency and reduce fouling in coal-fired power plants |
| CN103759290A (en) * | 2014-01-16 | 2014-04-30 | 广东电网公司电力科学研究院 | Large coal-fired unit online monitoring and optimal control system and implementation method thereof |
| CN103968371A (en) * | 2014-02-07 | 2014-08-06 | 广东电网公司电力科学研究院 | Electric combustion boiler and SOFA (separated over fire air) adjustment method based on numerical simulation technique |
| CN104456615A (en) * | 2014-12-05 | 2015-03-25 | 苏州华瑞能泰发电技术有限公司 | Integrated debugging method of opposed firing pulverized coal boiler |
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2015
- 2015-09-25 CN CN201510621092.XA patent/CN106556028A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2443551B (en) * | 2006-11-02 | 2011-08-24 | Gen Electric | Systems to increase efficiency and reduce fouling in coal-fired power plants |
| CN103759290A (en) * | 2014-01-16 | 2014-04-30 | 广东电网公司电力科学研究院 | Large coal-fired unit online monitoring and optimal control system and implementation method thereof |
| CN103968371A (en) * | 2014-02-07 | 2014-08-06 | 广东电网公司电力科学研究院 | Electric combustion boiler and SOFA (separated over fire air) adjustment method based on numerical simulation technique |
| CN104456615A (en) * | 2014-12-05 | 2015-03-25 | 苏州华瑞能泰发电技术有限公司 | Integrated debugging method of opposed firing pulverized coal boiler |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113587139A (en) * | 2021-07-29 | 2021-11-02 | 苏州西热节能环保技术有限公司 | Method for controlling NOx generation concentration in deep peak-load-reducing process |
| CN113587139B (en) * | 2021-07-29 | 2022-08-30 | 苏州西热节能环保技术有限公司 | Method for controlling NOx generation concentration in deep peak-load-reducing process |
| CN113701187A (en) * | 2021-08-04 | 2021-11-26 | 苏州西热节能环保技术有限公司 | Method for controlling opening degree of burnout air door and storage medium thereof |
| CN113701187B (en) * | 2021-08-04 | 2023-02-17 | 苏州西热节能环保技术有限公司 | Method for controlling opening degree of burnout air door and storage medium thereof |
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Application publication date: 20170405 |
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