CN110124480A - A kind of streamer-discahrge plasma electric dedusting remodeling method based on coal-burning power plant - Google Patents

A kind of streamer-discahrge plasma electric dedusting remodeling method based on coal-burning power plant Download PDF

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Publication number
CN110124480A
CN110124480A CN201910391813.0A CN201910391813A CN110124480A CN 110124480 A CN110124480 A CN 110124480A CN 201910391813 A CN201910391813 A CN 201910391813A CN 110124480 A CN110124480 A CN 110124480A
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China
Prior art keywords
streamer
power supply
discahrge
electric
temperature plasma
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CN201910391813.0A
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Chinese (zh)
Inventor
徐荣田
郭靖
梁晶
李逢茂
侯开忠
冯小平
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Shanxi Jinzhe Environmental Protection Technology Co ltd
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Shanxi Jinzhe Environmental Protection Technology Co ltd
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Priority to CN201910391813.0A priority Critical patent/CN110124480A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/32Separation 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 electrical effects other than those provided for in group B01D61/00
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/60Simultaneously removing sulfur oxides and nitrogen oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/017Combinations of electrostatic separation with other processes, not otherwise provided for
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

The invention discloses a kind of streamer-discahrge plasma electric dedusting remodeling method based on coal-burning power plant is transformed by high voltage power supply to all electric fields of electric precipitator and ontology while realizing particulate matter emission reduction and the oxidation of gas pollutant.The high voltage power supply transformation is exactly to transform streamer-discahrge plasma power supply as to the high voltage power supply of former negative polarity, after the ontology is transformed aiming at streamer-discahrge plasma power supply is transform as, for the transformation for meeting deduster efficiency of dust collection and the small subregion carried out and high intensity discharge pole arrangement.The present invention can efficiently use existing electric precipitation, realize dedusting and gaseous pollutant (NOx, SO simultaneously2, heavy metal etc.) oxidation, for solve because SCR excessively spray ammonia due to caused by the escaping of ammonia, SCR catalyst and air preheater blockage problem provide a kind of new process and new method.

Description

A kind of streamer-discahrge plasma electric dedusting remodeling method based on coal-burning power plant
Technical field
The present invention relates to a kind of sides that the oxidation of dedusting gaseous pollutant is transformed by electric precipitation high voltage power supply and electric field subregion Method, specially a kind of streamer based on coal-burning power plant put plasma electric dedusting remodeling method.
Background technique
The removing of the big pollutant of coal-burning boiler three mainly use electric precipitation (Electrostatic Precipitator, ESP flue dust) is collected, using selective catalytic reduction and selective non-catalytic reduction denitration, using wet desulphurization.Selectivity is urged Changing reduction (Selective Catalytic Reduction, SCR) is under the action of catalyst, to utilize NH3, the reduction such as urea NOx is selectively generating N by agent2And H2The technology of O;Non-selective catalytic reduction (Selective Non-catalytic Reduction, SNCR) it is to utilize NH3NOx is reduced to N at high temperature by equal reducing agents2Technology.Wet desulphurization has lime stone stone Cream method and ammonia process (Flue Gas Desulfurization, FGD) etc., coal-fired flue-gas first SCR/SNCR denitration at high temperature, ESP dedusting and FGD desulfurization again.
With the implementation of coal-burning boiler minimum discharge transformation and the development of depth emission reduction, SCR/SNCR denitrating system excess load It runs and excessive a series of problems, such as spraying ammonia, causing the escaping of ammonia, catalyst and the blocking of rear end air preheater, dust collector efficiency decline. The present invention carries out plasma power supply to former electric precipitation and electrode is transformed, and realizes dedusting, NOXIt is oxidation integrated, the gaseous state after oxidation Pollutant can absorb in FGD, to reach control while combined pollution.
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of streamer-discahrge plasma electric dedusting transformation side based on coal-burning power plant Method.
The present invention adopts the following technical scheme that realization: a kind of streamer-discahrge plasma electric based on coal-burning power plant removes Dirt remodeling method follows the steps below transformation:
S1: the negative polarity high voltage power supply in electric precipitator is changed to streamer by the coal-burning power plant for being 150 MW for unit scale Discharge low-temperature plasma positive polarity power supply, the quantity of streamer-discahrge low-temperature plasma electrical source are 8-10 platform, every furnace streamer The general power of discharge low-temperature plasma power supply is 1000-1200 KW;
S2: the negative polarity high voltage power supply in electric precipitator is changed to streamer by the coal-burning power plant for being 200 MW for unit scale Discharge low-temperature plasma positive polarity power supply, the quantity of streamer-discahrge low-temperature plasma electrical source are 16-20 platform, every furnace stream The general power of light discharge low-temperature plasma power supply is 1400-1600 KW;
S3: the negative polarity high voltage power supply in electric precipitator is changed to streamer by the coal-burning power plant for being 300 MW for unit scale Discharge low-temperature plasma positive polarity power supply, the quantity of streamer-discahrge low-temperature plasma electrical source are 20-24 platform, every furnace stream The general power of light discharge low-temperature plasma power supply is 2000-2400 KW;
S4: the negative polarity high voltage power supply in electric precipitator is changed to streamer by the coal-burning power plant for being 600 MW for unit scale Discharge low-temperature plasma positive polarity power supply, the quantity of streamer-discahrge low-temperature plasma electrical source are 32-40 platform, every furnace stream The general power of light discharge low-temperature plasma power supply is 4000-4800 KW,
S5: the negative polarity high voltage power supply in electric precipitator is changed to stream by the coal-burning power plant for being 1000 MW for unit scale Light discharge low-temperature plasma positive polarity power supply, the quantity of streamer-discahrge low-temperature plasma electrical source are 48-60 platform, every furnace The general power of streamer-discahrge low-temperature plasma electrical source is 6000-7200 KW.
The technical principle of technical solution of the present invention is as follows:
Streamer-discahrge low temperature plasma deduster auxiliary SCR/SNCR denitration principle is in streamer-discahrge, and high energy electron can be with It is high chemically active free radical (OH, O, N etc.) or other active materials (O by gas molecule excitation3、H2O2、H3O+ Deng), following reaction is carried out to the combined pollutant in flue gas:
(1) O + NO –> NO2
(2) OH + NO –> HNO2
(3) OH + NO2 –> HNO3
(4) NO2+ SO2–>N2+ SO3
(5) H + O2 –> HO2
(6) O + SO2 –> SO3
(7) OH + SO2 –> HSO3
Because reaction (1), (2) and (3) speed significantly larger than react (5) and (6), improved main process be react (1), (2) and (3), the NO in subsequent FGD2、HNO2And HNO3It is absorbed, NO in reaction (3)2Direct-reduction, realizes electric precipitation and changes Denitration is made, the ammonia spraying amount in SCR or SNCR can be reduced after Retrofit on electrostatic precipitator.
A kind of above-mentioned streamer-discahrge plasma electric dedusting remodeling method based on coal-burning power plant, streamer-discahrge low temperature etc. from Daughter positive polarity power supply is other positive high voltage power supplys such as three phase mains, high frequency electric source or the pulse power of positive high voltage output.
A kind of above-mentioned streamer-discahrge plasma electric dedusting remodeling method based on coal-burning power plant is for unit scale The electric precipitator of the coal-burning power plant of 600 MW or more carries out the transformation of electric field subregion;It is 600 MW fire coal below for unit scale The electric precipitator of power plant may be selected to carry out the transformation of electric field subregion, if electric precipitator is the deduster of top electromagnetic shaking, before The mode of subregion carries out electric field subregion transformation afterwards;It, can be using left and right point if electric precipitator is the deduster of side mechanical vibrator The mode in area carries out electric field subregion transformation.Subregion transformation can not only meet deduster efficiency of dust collection simultaneously but also meet high intensity discharge pole Arrangement.
The present invention has following technical effect that
1, realize that high-effective dust-removing, house outlet dust concentration are lower than 20mg/m3;
2, effectively inhibit the escaping of ammonia, prevention air preheater blocking;
3, SCR efficient denitration is assisted, catalyst service life is extended;
4, it is consumed without denitration materials such as ammonia, urea;
5, equipment is simple, and Power supply alteration is carried out on the basis of former electric precipitation, not other occupied ground, outstanding for old scrap build It is advantageous;
6, the equipment installation period is short, and unit influence on system operation is small;
7, it runs, safeguard simply, and former electric precipitation is without significant change;
8, operating cost is low, and relatively former deduster power consumption variation is little, to reduce operating cost;
9, security performance is high, and no toxic, harmful, inflammable, explosive substance participates in reaction.
Detailed description of the invention
Fig. 1 is Electric Field in ESP subregion schematic diagram after transformation.
Specific embodiment
The present invention is transformed electric precipitation as shown in the table:
For the body of deduster of top electromagnetic shaking, the small subregion of electric field can be carried out by the way of the subregion of front and back;And for The body of deduster of side mechanical vibrator can carry out the small subregion of electric field, as shown in Figure 1 by the way of the subregion of left and right.
By the transformation to electric precipitator, the present invention brings following economic benefit:
1, plasma deduster removes 50mg/m3NOX, it is possible to reduce the ammonia spraying amount of SCR or SNCR moderate.
2, electric precipitation uses plasma positive polarity power supply, is not affected by temperature, and when underload, equally there is higher denitration to imitate Fruit reduces air preheater and blocks risk, to save air preheater because of the escaping of ammonia caused by excessively spraying ammonia when can avoid underload in this way Block clearing expense, and due to air preheater blocking needs shutdown maintenance caused by power generation loss.
3, ammonia spraying amount is reduced for a long time, and catalyst is run at low load, can also extend the service life of catalyst, Jin Erjie Save catalyst costs;
4, using plasma power supply, electric precipitator has the heavy metals effects such as removing mercury.

Claims (3)

1. a kind of streamer-discahrge plasma electric dedusting remodeling method based on coal-burning power plant, it is characterised in that according to the following steps into Row transformation:
S1: the negative polarity high voltage power supply in electric precipitator is changed to streamer by the coal-burning power plant for being 150 MW for unit scale Discharge low-temperature plasma positive polarity power supply, the quantity of streamer-discahrge low temperature plasma positive polarity power supply are 8-10 platform, every The general power of furnace streamer-discahrge low-temperature plasma electrical source is 1000-1200 KW;
S2: the negative polarity high voltage power supply in electric precipitator is changed to streamer by the coal-burning power plant for being 200 MW for unit scale Discharge low-temperature plasma positive polarity power supply, the quantity of streamer-discahrge low temperature plasma positive polarity power supply are 16-20 platform, often The general power of platform furnace streamer-discahrge low-temperature plasma electrical source is 1400-1600 KW;
S3: the negative polarity high voltage power supply in electric precipitator is changed to streamer by the coal-burning power plant for being 300 MW for unit scale Discharge low-temperature plasma positive polarity power supply, the quantity of streamer-discahrge low temperature plasma positive polarity power supply are 20-24 platform, often The general power of platform furnace streamer-discahrge low-temperature plasma electrical source is 2000-2400 KW;
S4: the negative polarity high voltage power supply in electric precipitator is changed to streamer by the coal-burning power plant for being 600 MW for unit scale Discharge low-temperature plasma positive polarity power supply, the quantity of streamer-discahrge low temperature plasma positive polarity power supply are 32-40 platform, often The general power of platform furnace streamer-discahrge low-temperature plasma electrical source is 4000-4800 KW;
S5: the negative polarity high voltage power supply in electric precipitator is changed to stream by the coal-burning power plant for being 1000 MW for unit scale Light discharge low-temperature plasma positive polarity power supply, the quantity of streamer-discahrge low temperature plasma positive polarity power supply are 48-60 platform, The general power of every furnace streamer-discahrge low-temperature plasma electrical source is 6000-7200 KW.
2. a kind of streamer-discahrge plasma electric dedusting remodeling method based on coal-burning power plant according to claim 1, special Sign is that streamer-discahrge low temperature plasma positive polarity power supply is three phase mains, high frequency electric source or the pulse electricity of positive high voltage output Source.
3. a kind of streamer-discahrge plasma electric dedusting remodeling method based on coal-burning power plant according to claim 1 or 2, It is characterized in that the electric precipitator for the coal-burning power plant that unit scale is 600 MW or more carries out the transformation of electric field subregion;For unit Scale is that the electric precipitator of the coal-burning power plant below 600 MW may be selected to carry out the transformation of electric field subregion, if electric precipitator is top electricity The deduster of magnetic rapping carries out electric field subregion transformation by the way of the subregion of front and back;If electric precipitator is side mechanical vibrator Deduster can carry out electric field subregion transformation by the way of the subregion of left and right.
CN201910391813.0A 2019-05-13 2019-05-13 A kind of streamer-discahrge plasma electric dedusting remodeling method based on coal-burning power plant Pending CN110124480A (en)

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Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1390630A (en) * 2002-04-01 2003-01-15 广东杰特科技发展有限公司 Distributed control type steam-light discharge process for desulfurizing fume by semi-wet method
CN1502402A (en) * 2002-11-26 2004-06-09 广东杰特科技发展有限公司 Industrial apparatus for plasma capable of generating random streamer discharge and application thereof
CN1562445A (en) * 2004-03-29 2005-01-12 广东杰特科技发展有限公司 Method of synchronous cleansing air pollutant by smoke of plasma discharge caused by spreading light
US20090249772A1 (en) * 2008-04-08 2009-10-08 Mitsubishi Electric Corporation Exhaust gas purification device
CN101810990A (en) * 2009-12-31 2010-08-25 北京航空航天大学 Method for efficiently removing NOx in fume
CN101810993A (en) * 2009-12-31 2010-08-25 北京航空航天大学 Method for achieving high effective mercury removal through modifying electrostatic precipitator
CN102059050A (en) * 2010-11-30 2011-05-18 浙江大学 Low-temperature plasma smoke compound pollutant control method
CN102407187A (en) * 2011-12-15 2012-04-11 山西晋浙环保科技有限公司 Optimized power supply device for electric precipitation
CN103566722A (en) * 2013-10-11 2014-02-12 北京睿昱达科技有限公司 Method and device for integrally desulfurizing, denitrating and dust-removing by plasma
CN104548890A (en) * 2013-10-23 2015-04-29 天津市英格环保科技有限公司 Two-media low-temperature plasma flue gas treatment system
US20150265740A1 (en) * 2014-03-24 2015-09-24 Kabushiki Kaisha Toshiba Gas processing apparatus
CN105396441A (en) * 2015-10-28 2016-03-16 山西晋浙环保科技有限公司 Low-temperature economizer and bipolar high-voltage streamer corona discharge combined smoke cleaning method
CN107008571A (en) * 2017-04-19 2017-08-04 山西晋浙环保科技有限公司 A kind of electric cleaner

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1390630A (en) * 2002-04-01 2003-01-15 广东杰特科技发展有限公司 Distributed control type steam-light discharge process for desulfurizing fume by semi-wet method
CN1502402A (en) * 2002-11-26 2004-06-09 广东杰特科技发展有限公司 Industrial apparatus for plasma capable of generating random streamer discharge and application thereof
CN1562445A (en) * 2004-03-29 2005-01-12 广东杰特科技发展有限公司 Method of synchronous cleansing air pollutant by smoke of plasma discharge caused by spreading light
US20090249772A1 (en) * 2008-04-08 2009-10-08 Mitsubishi Electric Corporation Exhaust gas purification device
CN101810990A (en) * 2009-12-31 2010-08-25 北京航空航天大学 Method for efficiently removing NOx in fume
CN101810993A (en) * 2009-12-31 2010-08-25 北京航空航天大学 Method for achieving high effective mercury removal through modifying electrostatic precipitator
CN102059050A (en) * 2010-11-30 2011-05-18 浙江大学 Low-temperature plasma smoke compound pollutant control method
CN102407187A (en) * 2011-12-15 2012-04-11 山西晋浙环保科技有限公司 Optimized power supply device for electric precipitation
CN103566722A (en) * 2013-10-11 2014-02-12 北京睿昱达科技有限公司 Method and device for integrally desulfurizing, denitrating and dust-removing by plasma
CN104548890A (en) * 2013-10-23 2015-04-29 天津市英格环保科技有限公司 Two-media low-temperature plasma flue gas treatment system
US20150265740A1 (en) * 2014-03-24 2015-09-24 Kabushiki Kaisha Toshiba Gas processing apparatus
CN105396441A (en) * 2015-10-28 2016-03-16 山西晋浙环保科技有限公司 Low-temperature economizer and bipolar high-voltage streamer corona discharge combined smoke cleaning method
CN107008571A (en) * 2017-04-19 2017-08-04 山西晋浙环保科技有限公司 A kind of electric cleaner

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
生态环境部环境工程评估中心编: "《火电行业环境保护法律法规、技术规范与标准汇编》", 31 January 2019, 中国环境出版集团 *
蓝虹等: "《大气污染治理的投融资机制研究》", 30 April 2018, 中国金融出版社 *

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