CN109365135A - A kind of thermal power plant's dust pelletizing system intelligent power saving autocontrol method - Google Patents

A kind of thermal power plant's dust pelletizing system intelligent power saving autocontrol method Download PDF

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Publication number
CN109365135A
CN109365135A CN201811216065.4A CN201811216065A CN109365135A CN 109365135 A CN109365135 A CN 109365135A CN 201811216065 A CN201811216065 A CN 201811216065A CN 109365135 A CN109365135 A CN 109365135A
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wet
power supply
electricity
precipitator
high voltage
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CN109365135B (en
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刘增瑞
白永岗
张华东
张超
边明心
李东阳
李�杰
郭明
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Huaneng Xindian Power Generation Co Ltd
Xian Thermal Power Research Institute Co Ltd
Xian Xire Boiler Environmental Protection Engineering Co Ltd
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Huaneng Xindian Power Generation Co Ltd
Xian Thermal Power Research Institute Co Ltd
Xian Xire Boiler Environmental Protection Engineering Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/66—Applications of electricity supply techniques
    • B03C3/68—Control systems therefor

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Electrostatic Separation (AREA)

Abstract

The invention discloses a kind of thermal power plant's dust pelletizing system intelligent power saving autocontrol methods, the following steps are included: obtaining unit coal-burning amount, coal-fired ash content and exhaust gas volumn in real time, the high voltage power supply secondary voltage U of electric precipitator is calculated further according to unit coal-burning amount, coal-fired ash content and exhaust gas volumnElectricitySetting value Uesp, then according to the high voltage power supply secondary voltage U of electric precipitatorElectricitySetting value UespAdjust the high voltage power supply secondary voltage U of electric precipitatorElectricity；The practical smoke dust discharge concentration of real-time measurement wet electrostatic precipitator outlet calculates by PID mode the secondary voltage U of wet electrical dust precipitator high voltage power supply further according to the practical smoke dust discharge concentration of wet electrostatic precipitator outletWet electricitySetting value Uwesp(n), then according to the secondary voltage U of wet electrical dust precipitator high voltage power supplyWet electricitySetting value Uwesp(n) the secondary voltage U of wet electrical dust precipitator high voltage power supply is adjustedWet electricity, this method enables to the energy-efficient operation under different working conditions of electric precipitator and wet electrical dust precipitator high voltage power supply.

Description

A kind of thermal power plant's dust pelletizing system intelligent power saving autocontrol method
Technical field
The invention belongs to coal-fired plant flue gas dedusting technology fields, and it is automatic to be related to a kind of thermal power plant's dust pelletizing system intelligent power saving Control method.
Background technique
According to the requirement of National Development and Reform Committee, Chinese Ministry of Environmental Protection, National Energy Board in 2014, ended for the end of the year 2017, it is most of coal-fired Power plant has been completed that minimum discharge is transformed.Many power plant are by the traditional high pressure silicon commutating power supply upgrading of electric precipitator for first Into efficient high frequency electric source and the pulse power.Wet electrical dust precipitator is arranged as a kind of novel cleaner in wet desulphurization After device, large-scale application is also achieved.Wet electrical dust precipitator generallys use power frequency constant-current supply or high frequency electric source as receipts Dirt high voltage power supply.Electric precipitator and wet electrical dust precipitator are imitated using good dedusting is achieved after novel high voltage power supply Fruit, the smoke dust discharge concentration of coal-burning power plant have mostly reached minimum discharge standard.Dust pelletizing system equipment is taken off by electric precipitator, wet process The composition such as sulphur, wet electrical dust precipitator, each equipment operation condition influence factor are more.
By taking 300MW unit as an example, every electric precipitator need to be equipped with 16~20 sets of high voltage power supplies, and every wet electrical dust precipitator needs It is equipped with 4 sets of high voltage power supplies.However, the unreasonable method of operation and operating parameter of high voltage power supply causes deduster operation power consumption inclined Height, the power consumption of these high voltage power supplies account for about 80% or more that entire dust pelletizing system runs total power consumption, and in unit coal-burning amount, cigarette The duty parameters such as tolerance cannot automatically adjust operating parameter at any time when changing, so that electric precipitator and wet electrical dust precipitator Station service power consumption rate is high.How to realize electric precipitator and wet electrical dust precipitator collaboration optimal control, how to make these high-voltage electricity Source operation energy-efficient under different working conditions, it is energy-saving to electric precipitator and wet electrical dust precipitator that there is important meaning Justice.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, a kind of thermal power plant's dust pelletizing system intelligence section is provided Energy autocontrol method, this method enable to electric precipitator and wet electrical dust precipitator high voltage power supply high under different working conditions Imitate energy-saving run.
In order to achieve the above objectives, thermal power plant's dust pelletizing system intelligent power saving autocontrol method of the present invention includes following Step:
Unit coal-burning amount, coal-fired ash content and exhaust gas volumn are obtained in real time, further according to unit coal-burning amount, coal-fired ash content and exhaust gas volumn Calculate the high voltage power supply secondary voltage U of electric precipitatorElectricitySetting value Uesp, then according to the secondary electricity of the high voltage power supply of electric precipitator Press UElectricitySetting value UespAdjust the high voltage power supply secondary voltage U of electric precipitatorElectricity；
The practical smoke dust discharge concentration of real-time measurement wet electrostatic precipitator outlet, further according to the reality of wet electrostatic precipitator outlet Border smoke dust discharge concentration calculates the secondary voltage U of wet electrical dust precipitator high voltage power supply by PID modeWet electricitySetting value Uwesp(n), Then according to the secondary voltage U of wet electrical dust precipitator high voltage power supplyWet electricitySetting value Uwesp(n) wet electrical dust precipitator high-voltage electricity is adjusted The secondary voltage U in sourceWet electricity。
The high voltage power supply secondary voltage U of electric precipitatorElectricitySetting value UespExpression formula are as follows:
Wherein, A is the dust-collecting area of electric precipitator, k1For preset coefficient, W is the Coal-fired capacity of unit, and Q is electric precipitator The exhaust gas volumn of entrance, n are coal-fired ash, Cesp.outSmoke dust discharge concentration is exported for electric precipitator.
The secondary voltage U of wet electrical dust precipitator high voltage power supplyWet electricitySetting value Uwesp(n) expression formula are as follows:
Wherein, KpFor proportionality coefficient, T is sampling time, TiFor the time of integration, TDFor derivative time, Δ C is that wet type electricity removes The practical smoke dust discharge concentration of dirt device outlet and the departure of setting smoke dust discharge concentration.
According to the high voltage power supply secondary voltage U of electric precipitatorElectricitySetting value UespElectric precipitator is adjusted by DCS system High voltage power supply secondary voltage UElectricity。
According to the secondary voltage U of wet electrical dust precipitator high voltage power supplyWet electricitySetting value Uwesp(n) wet type is adjusted by DCS system The secondary voltage U of electric precipitator high voltage power supplyWet electricity。
The invention has the following advantages:
Thermal power plant's dust pelletizing system intelligent power saving autocontrol method of the present invention is when specific operation, by according to machine Group Coal-fired capacity, coal-fired ash content and exhaust gas volumn calculate the high voltage power supply secondary voltage U of electric precipitatorElectricitySetting value Uesp, and successively adjust The high voltage power supply secondary voltage of economize on electricity deduster；It is calculated simultaneously according to the practical smoke dust discharge concentration of wet electrostatic precipitator outlet wet The secondary voltage U of formula electric precipitator high voltage power supplyWet electricitySetting value Uwesp(n), and with this wet electrical dust precipitator high voltage power supply is adjusted Secondary voltage UWet electricity, realize the secondary voltage U of wet electrical dust precipitator high voltage power supplyWet electricityAnd the high voltage power supply secondary voltage of electric precipitator UElectricityAutomatic adjustment while electricity is removed so that high voltage power supply Intelligent efficient energy-saving under required the smallest power consumption state is run Dust concentration at dirt device and wet electrostatic precipitator outlet is stablized within environmental requirement value, realizes the minimum discharge of flue gas.
Detailed description of the invention
Fig. 1 is flow chart of the invention.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
With reference to Fig. 1, thermal power plant's dust pelletizing system intelligent power saving autocontrol method of the present invention the following steps are included:
Unit coal-burning amount, coal-fired ash content and exhaust gas volumn are obtained in real time, further according to unit coal-burning amount, coal-fired ash content and exhaust gas volumn Calculate the high voltage power supply secondary voltage U of electric precipitatorElectricitySetting value Uesp, then according to the secondary electricity of the high voltage power supply of electric precipitator Press UElectricitySetting value UespThe high voltage power supply secondary voltage U of electric precipitator is adjusted by DCS systemElectricity, wherein the height of electric precipitator Voltage source secondary voltage UElectricitySetting value UespExpression formula are as follows:
ω=k1Uesp 2
Wherein, A is the dust-collecting area of electric precipitator, k1For preset coefficient, W is the Coal-fired capacity of unit, and Q is electric precipitator The exhaust gas volumn of entrance, n are coal-fired ash, Cesp.outSmoke dust discharge concentration is exported for electric precipitator.
In practical operation, by measuring the dust concentration that electric precipitator is imported and exported under different operating conditions, transported in conjunction with history Row data obtain the high voltage power supply secondary voltage U of specific electric precipitator using the method for curve matchingespFunctional relation, Cesp.outIt can be chosen for electric precipitator outlet dust concentration design certified value, finally obtain Uesp=f2(w, n, Q).
The practical smoke dust discharge concentration of real-time measurement wet electrostatic precipitator outlet, further according to the reality of wet electrostatic precipitator outlet Border smoke dust discharge concentration calculates the secondary voltage U of wet electrical dust precipitator high voltage power supply by PID modeWet electricitySetting value Uwesp(n), Then according to the secondary voltage U of wet electrical dust precipitator high voltage power supplyWet electricitySetting value Uwesp(n) wet type electricity is adjusted by DCS system to remove The secondary voltage U of dirt device high voltage power supplyWet electricity, wherein the secondary voltage U of wet electrical dust precipitator high voltage power supplyWet electricitySetting value Uwesp(n) Expression formula are as follows:
Wherein, KpFor proportionality coefficient, T is sampling time, TiFor the time of integration, TDFor derivative time, Δ C is that wet type electricity removes The practical smoke dust discharge concentration of dirt device outlet and the departure of setting smoke dust discharge concentration.
Due to operating condition, the fluctuation of wet electrostatic precipitator outlet dust concentration is more frequent, if before can choosing the sampling value The average value and setting value of dry second acquires deviation, and such PID controller work will be more stable.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills Art field, is included within the scope of the present invention.

Claims (5)

1. a kind of thermal power plant's dust pelletizing system intelligent power saving autocontrol method, which comprises the following steps:
Unit coal-burning amount, coal-fired ash content and exhaust gas volumn are obtained in real time, are calculated further according to unit coal-burning amount, coal-fired ash content and exhaust gas volumn The high voltage power supply secondary voltage U of electric precipitatorElectricitySetting value Uesp, then according to the high voltage power supply secondary voltage U of electric precipitatorElectricity Setting value UespAdjust the high voltage power supply secondary voltage U of electric precipitatorElectricity；
The practical smoke dust discharge concentration of real-time measurement wet electrostatic precipitator outlet, further according to the practical cigarette of wet electrostatic precipitator outlet Dirt concentration of emission calculates the secondary voltage U of wet electrical dust precipitator high voltage power supply by PID modeWet electricitySetting value Uwesp(n), then According to the secondary voltage U of wet electrical dust precipitator high voltage power supplyWet electricitySetting value Uwesp(n) wet electrical dust precipitator high voltage power supply is adjusted Secondary voltage UWet electricity。
2. thermal power plant's dust pelletizing system intelligent power saving autocontrol method according to claim 1, which is characterized in that electric precipitation The high voltage power supply secondary voltage U of deviceElectricitySetting value UespExpression formula are as follows:
Wherein, A is the dust-collecting area of electric precipitator, k1For preset coefficient, W is the Coal-fired capacity of unit, and Q is electric precipitator entrance Exhaust gas volumn, n is coal-fired ash, Cesp.outSmoke dust discharge concentration is exported for electric precipitator.
3. thermal power plant's dust pelletizing system intelligent power saving autocontrol method according to claim 1, which is characterized in that wet type electricity The secondary voltage U of deduster high voltage power supplyWet electricitySetting value Uwesp(n) expression formula are as follows:
Wherein, KpFor proportionality coefficient, T is sampling time, TiFor the time of integration, TDFor derivative time, Δ C is wet electrical dust precipitator The practical smoke dust discharge concentration of outlet and the departure of setting smoke dust discharge concentration.
4. thermal power plant's dust pelletizing system intelligent power saving autocontrol method according to claim 1, which is characterized in that according to electricity The high voltage power supply secondary voltage U of dedusterElectricitySetting value UespThe secondary electricity of high voltage power supply of electric precipitator is adjusted by DCS system Press UElectricity。
5. thermal power plant's dust pelletizing system intelligent power saving autocontrol method according to claim 1, which is characterized in that according to wet The secondary voltage U of formula electric precipitator high voltage power supplyWet electricitySetting value Uwesp(n) wet electrical dust precipitator high-voltage electricity is adjusted by DCS system The secondary voltage U in sourceWet electricity。
CN201811216065.4A 2018-10-18 2018-10-18 Intelligent energy-saving automatic control method for thermal power plant dust removal system Active CN109365135B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110801940A (en) * 2019-10-28 2020-02-18 华北电力科学研究院有限责任公司 High-frequency voltage control method and device for electric dust collector
CN110935567A (en) * 2019-12-05 2020-03-31 浙江浙能台州第二发电有限责任公司 Thermal power generating unit dry-type electric precipitator optimization control method and system
CN112536153A (en) * 2020-11-23 2021-03-23 西安热工研究院有限公司 Novel energy-conserving optimization integrated management system of electricity dust removal
CN112742603A (en) * 2020-12-09 2021-05-04 东南大学 Automatic control method for wet-type electric precipitator of thermal power generating unit
CN114798179A (en) * 2022-05-25 2022-07-29 南方电网电力科技股份有限公司 Control method and device of electrostatic dust collector

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CN104578818A (en) * 2013-10-21 2015-04-29 大连德维电子科技有限公司 High-frequency high-voltage power supply used for electrostatic precipitation and control method
CN104971824A (en) * 2015-07-06 2015-10-14 华能国际电力开发公司铜川照金电厂 Combined automatic dust control system based on dry electrical dust precipitator and wet dust collector
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CN2057371U (en) * 1989-10-21 1990-05-23 邯郸市环境保护设备总厂 Power unit of high voltage electrostatic duster
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Publication number Priority date Publication date Assignee Title
CN110801940A (en) * 2019-10-28 2020-02-18 华北电力科学研究院有限责任公司 High-frequency voltage control method and device for electric dust collector
CN110935567A (en) * 2019-12-05 2020-03-31 浙江浙能台州第二发电有限责任公司 Thermal power generating unit dry-type electric precipitator optimization control method and system
CN112536153A (en) * 2020-11-23 2021-03-23 西安热工研究院有限公司 Novel energy-conserving optimization integrated management system of electricity dust removal
CN112742603A (en) * 2020-12-09 2021-05-04 东南大学 Automatic control method for wet-type electric precipitator of thermal power generating unit
CN112742603B (en) * 2020-12-09 2022-11-29 东南大学 Automatic control method for wet-type electric precipitator of thermal power generating unit
CN114798179A (en) * 2022-05-25 2022-07-29 南方电网电力科技股份有限公司 Control method and device of electrostatic dust collector
CN114798179B (en) * 2022-05-25 2024-03-19 南方电网电力科技股份有限公司 Control method and device of electrostatic precipitator

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