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 PDFInfo
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- 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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- streamer
- power supply
- discahrge
- temperature plasma
- coal
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000007634 remodeling Methods 0.000 title claims abstract description 10
- 239000012716 precipitator Substances 0.000 claims abstract description 21
- 230000009466 transformation Effects 0.000 claims abstract description 17
- 230000005684 electric field Effects 0.000 claims abstract description 13
- 230000005611 electricity Effects 0.000 claims 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 25
- 229910021529 ammonia Inorganic materials 0.000 abstract description 12
- 238000001556 precipitation Methods 0.000 abstract description 9
- 239000003054 catalyst Substances 0.000 abstract description 7
- 239000003344 environmental pollutant Substances 0.000 abstract description 6
- 231100000719 pollutant Toxicity 0.000 abstract description 6
- 230000003647 oxidation Effects 0.000 abstract description 5
- 238000007254 oxidation reaction Methods 0.000 abstract description 5
- 239000000428 dust Substances 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 2
- 239000013618 particulate matter Substances 0.000 abstract 1
- 239000007921 spray Substances 0.000 abstract 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000006722 reduction reaction Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012717 electrostatic precipitator Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- 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
- B01D53/32—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 electrical effects other than those provided for in group B01D61/00
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
-
- 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
- B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Electrostatic Separation (AREA)
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
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910391813.0A CN110124480A (en) | 2019-05-13 | 2019-05-13 | A kind of streamer-discahrge plasma electric dedusting remodeling method based on coal-burning power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910391813.0A CN110124480A (en) | 2019-05-13 | 2019-05-13 | A kind of streamer-discahrge plasma electric dedusting remodeling method based on coal-burning power plant |
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| Publication Number | Publication Date |
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| CN110124480A true CN110124480A (en) | 2019-08-16 |
Family
ID=67573262
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