CN103463944A - Electrostatic cooperative pollutant removing method and device - Google Patents
Electrostatic cooperative pollutant removing method and device Download PDFInfo
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- CN103463944A CN103463944A CN2013104352768A CN201310435276A CN103463944A CN 103463944 A CN103463944 A CN 103463944A CN 2013104352768 A CN2013104352768 A CN 2013104352768A CN 201310435276 A CN201310435276 A CN 201310435276A CN 103463944 A CN103463944 A CN 103463944A
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- lime powder
- electrostatic precipitator
- static
- flue gas
- temperature plasma
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Abstract
The invention discloses an electrostatic cooperative pollutant removing method and device. The method comprises the following steps: firstly, conveying exhaust gas to an electrostatic dust collector for dust removal in advance, thus removing more than 90% of particles in the exhaust gas; secondly, generating low-temperature plasmas by a low-temperature plasma generating system, oxidizing and degrading pollutants in the exhaust gas subjected to dust removal in advance; thirdly, sucking or adsorbing the exhaust gas processed in the second step with a calcium oxide powder spraying method; fourthly, conveying the exhaust gas processed in the third step and used calcium oxide powder to a high-frequency impulse power supply electrostatic dust collector. The device is simple in system, compact in structure, high in pollutant removal efficiency, little in equipment investment, small in occupied space and low in operating cost.
Description
Technical field
The present invention relates to environmental protection technical field, relate in particular to the collaborative method for removing pollutant of a kind of static and device.
Background technology
Coal-burning power plant is important stationary source, and pollutant kind is various, removes system complex, and floor space is large, and expense is high.Dedusting, desulphurization and denitration device are generally equipped by existing power plant, for mercury, sulfur trioxide, hydrogen fluoride, hydrogen chloride, organic gaseous contamination thing, lack the means that effectively remove.Adopting multiple pollutant cooperation-removal method is to solve the effective and economic means that current coal-burning power plant pollutes.Research finds, low temperature plasma has the characteristics of high activity strong oxidizing property, the effectively gaseous contaminant in coal-fired flue-gas the organic gaseous contamination thing of degrading, and the product after oxidation can be used lime powder efficiently to remove.Set up a set of multiple pollutant cooperation-removal method based on this technology, can be effectively the major pollutants of power plant be carried out to efficient cooperation-removal, the system floor space is little, and investment and operating cost are little, are the preferred means that solves at present coal-burning power plant's pollutant.
Summary of the invention
The deficiency existed for solving prior art, the invention discloses the collaborative method for removing pollutant of a kind of static and device, the present invention is by combining Low Temperature Plasma Treating technology, chemical absorbing/absorption and efficient electric dedusting technology, remove the various major pollutants of power plant, solved the single shortcoming of traditional pollutant removing capacity of equipment, there is floor space little, the little characteristics of investment operating cost simultaneously.
For achieving the above object, concrete scheme of the present invention is as follows:
A kind of static is worked in coordination with method for removing pollutant, comprises the following steps:
Step 1: flue gas is transported to electrostatic precipitator and carries out pre-dedusting, remove the particle more than 90% in flue gas;
Step 2: the low temperature plasma generation systems produces low temperature plasma, by pollutant oxidation and the degraded in the flue gas after pre-dedusting;
Step 3: utilize the lime powder injection method to absorb or the flue gas of absorption after step 2 is processed;
Step 4: the flue gas after step 3 is processed and the lime powder after use are delivered to high-frequency impulse power supply electrostatic precipitator.
In described step 1, electrostatic precipitator is the conventional DC electrostatic dust collection device of two electric fields or three electric fields.
In described step 2 in flue gas the pollutant oxidation and the degraded detailed process be: sulfur dioxide, nitric oxide, gaseous elementary mercury are oxidized to respectively to sulfur trioxide, nitrogen dioxide and gaseous state divalence mercury, organic gas is carried out to oxidative degradation simultaneously, produce carbon dioxide and water.
In described step 3, lime powder absorbs sulfur trioxide, nitrogen dioxide, oxidation state mercury and sour gas, the adsorptive gaseous divalence mercury of lime powder.Sour gas is hydrogen fluoride, hydrogen chloride etc.
Described step 4 medium-high frequency pulse power supply electrostatic precipitator is for collecting particle, the lime powder of flue gas.
A kind of static is worked in coordination with device for smoke pollutants, comprise smoke inlet, smoke inlet is connected with electrostatic precipitator, electrostatic precipitator is connected with the low temperature plasma generation systems, the low temperature plasma generation systems is connected with the lime powder spraying system, and the lime powder spraying system is connected with high-frequency impulse power supply electrostatic precipitator.
Described lime powder spraying system comprises that lime powder sprays or adsorption zone, be provided with the lime powder storehouse in lime powder injection or adsorption zone, below, lime powder storehouse is connected with the lime powder injection apparatus, and the lime powder injection apparatus is connected with the powder feeding blower fan.
Described high-frequency impulse power supply electrostatic precipitator is connected with high-voltage pulse power source.
Described electrostatic precipitator is connected with high-voltage DC power supply.
Described electrostatic precipitator is the conventional DC electrostatic dust collection device of two electric fields or three electric fields.
Described low temperature plasma generation systems is used high pressure pulse discharge or dielectric barrier discharge to produce low temperature plasma.
Use the conventional DC electrostatic dust collection device of two electric fields or three electric fields to carry out pre-dedusting, remove the particle more than 90% in flue gas, effectively reduce the energy consumption of low-temperature plasma generator, guarantee its operation steady in a long-term.
Use high pressure pulse discharge or dielectric barrier discharge to produce low temperature plasma, the sulfur dioxide in flue gas, nitric oxide, gaseous elementary mercury are oxidized to respectively to sulfur trioxide, nitrogen dioxide and gaseous state divalence mercury, oxidation efficiency all can reach more than 80%.Organic gas is carried out to oxidative degradation simultaneously, produce harmless carbon dioxide and water, its efficiency can reach more than 90%.
Use the lime powder injection method, the sour gas such as efficient absorption sulfur dioxide, sulfur trioxide, nitrogen dioxide, hydrogen fluoride, hydrogen chloride, absorption efficiency reaches more than 95%; Adsorb divalence mercury, adsorption efficiency reaches more than 80% simultaneously.
Use efficient high-frequency impulse power supply electrostatic precipitator to collect superfine particulate matter and lime powder and reacted other calcium base salt in flue gas, reach the purpose that flue gas is thoroughly purified, efficiency of dust collection reaches more than 99%, and the outlet particle concentration is lower than 30mg/m
3.
Beneficial effect of the present invention:
By two electric fields or the pre-dedusting of three electric field routine intravenous electric cleaners, remove the particle more than 90%, then utilize low temperature plasma oxidation sulfur dioxide, nitric oxide, gaseous elementary mercury degradable organic pollutant, follow-up by the jet paraffin oxidation calcium powder secondary pollution and the hydrogen fluoride after to oxidation, hydrogen chloride, the sour gas such as sulfur dioxide efficiently remove, removal efficiency reaches more than 99%, finally utilize the high-frequency electrostatic deduster efficiently to remove the calcium base salt particle that particle remaining in flue gas and lime powder and reaction generate, thereby realize the cooperation-removal of particle and gas pollutant.
Main advantage of the present invention:
1, realized the cooperation-removal of flue dust, oxysulfide, nitrogen oxide, hydrogen fluoride, hydrogen chloride, mercury, organic gaseous contamination thing.
2, the pollutant cooperation-removal only consumes electric energy and lime powder.
3, system is simple, compact conformation, and pollutant removing efficiency is high, and equipment investment is few, takes up room little, and operating cost is low.The accompanying drawing explanation
Fig. 1 process flow diagram of the present invention;
In figure, 1. smoke inlet, 2. electrostatic precipitator, 3. reaction of low temperature plasma district, 4. calcium oxide sprays and absorbs or adsorption zone, 5. lime powder storehouse, 6. powder feeding blower fan, 7. lime powder injection apparatus, 8. high-frequency impulse power supply electrostatic precipitator, 9. chimney.
The specific embodiment:
Below in conjunction with accompanying drawing, the present invention is described in detail:
As shown in Figure 1, a kind of static is worked in coordination with method for removing pollutant, comprises the following steps:
Step 1: flue gas is transported to electrostatic precipitator 2 and carries out pre-dedusting, remove the particle more than 90% in flue gas;
Step 2: the low temperature plasma generation systems produces low temperature plasma, by pollutant oxidation and the degraded in the flue gas after pre-dedusting;
Step 3: utilize the lime powder injection method to absorb or the flue gas of absorption after step 2 is processed;
Step 4: the flue gas after step 3 is processed and the lime powder after use are delivered to high-frequency impulse power supply electrostatic precipitator 8.
In described step 1, electrostatic precipitator 2 is the conventional DC electrostatic dust collection device of two electric fields or three electric fields.
In described step 2 in flue gas the pollutant oxidation and the degraded detailed process be: sulfur dioxide, nitric oxide, gaseous elementary mercury are oxidized to respectively to sulfur trioxide, nitrogen dioxide and gaseous state divalence mercury, organic gas is carried out to oxidative degradation simultaneously, produce carbon dioxide and water.
In described step 3, lime powder absorbs sulfur trioxide, nitrogen dioxide, oxidation state mercury and sour gas, the adsorptive gaseous divalence mercury of lime powder.
Particle, the lime powder of described step 4 medium-high frequency pulse power supply electrostatic precipitator 8 for collecting flue gas.
A kind of static is worked in coordination with device for smoke pollutants, comprise smoke inlet 1, smoke inlet 1 is connected with electrostatic precipitator 2, electrostatic precipitator 2 is connected with the low temperature plasma generation systems, the low temperature plasma generation systems is connected with the lime powder spraying system, and the lime powder spraying system is connected with high-frequency impulse power supply electrostatic precipitator.
Described lime powder spraying system comprises that lime powder sprays or adsorption zone 4, be provided with lime powder storehouse 5 in lime powder injection or adsorption zone 4,5 belows, lime powder storehouse are connected with lime powder injection apparatus 7, and lime powder injection apparatus 7 is connected with powder feeding blower fan 6.
Described high-frequency impulse power supply electrostatic precipitator 8 is connected with high-voltage pulse power source.
Described electrostatic precipitator 2 is connected with high-voltage DC power supply.
Described electrostatic precipitator 2 is the conventional DC electrostatic dust collection device of two electric fields or three electric fields.
Described low temperature plasma generation systems is used high pressure pulse discharge or dielectric barrier discharge to produce low temperature plasma.
Flue gas enters electrostatic precipitator 2 through smoke inlet 1, the particle removed more than 90% enters reaction of low temperature plasma district 3 later, utilize in the reactor that the high voltage narrow pulse electric discharge is 4cm in the heteropole spacing and produce low temperature plasma, a large amount of free radicals and a small amount of ozone are to sulfur dioxide, nitric oxide, gaseous elementary mercury carries out oxidation degradable organic pollutant, flue gas enters calcium oxide injection absorption or adsorption zone 4 subsequently, by powder feeding blower fan 6, the powder in lime powder storehouse 5 is sprayed into to calcium oxide by lime powder injection apparatus 7 and spray absorption or adsorption zone 4, efficiently remove the sulfur trioxide that oxidation generates, nitrogen dioxide, with the sulfur dioxide in oxidation state mercury and flue gas, hydrogen fluoride, hydrogen chloride, tail gas enters high-frequency impulse power supply electrostatic precipitator 8 and thoroughly purifies, finally enter chimney 9.Realize that the outlet particle concentration is lower than 30mg/m
3, sulfur dioxide concentration is lower than 100mg/m
3, nitrous oxides concentration is lower than 100mg/m
3, mercury concentration is lower than 0.05mg/m
3, the organic gaseous contamination substrate concentration is lower than 5mg/m
3, other acidic gas concentration are lower than 5mg/m
3, reach the final goal of protection of the environment
The present invention is applicable to all industry coal-boilers, and especially applicable for the boiler of having equipped routine intravenous electric cleaner and semi-dry desulphurization equipment, improvement cost is low, and reforming technology is simple.Be particularly related to the novel process that low temperature plasma oxidation bonding lime powder absorbs cooperation-removal flue gas particles, oxysulfide, nitrogen oxide, mercury, organic gaseous contamination thing.
Claims (10)
1. the collaborative method for removing pollutant of static, is characterized in that, comprises the following steps:
Step 1: flue gas is transported to electrostatic precipitator and carries out pre-dedusting, remove the particle more than 90% in flue gas;
Step 2: the low temperature plasma generation systems produces low temperature plasma, by pollutant oxidation and the degraded in the flue gas after pre-dedusting;
Step 3: utilize the lime powder injection method to absorb or the flue gas of absorption after step 2 is processed;
Step 4: the flue gas after step 3 is processed and the lime powder after use are delivered to high-frequency impulse power supply electrostatic precipitator.
2. a kind of static as claimed in claim 1 is worked in coordination with method for removing pollutant, it is characterized in that, in described step 2 in flue gas the pollutant oxidation and the degraded detailed process be: sulfur dioxide, nitric oxide, gaseous elementary mercury are oxidized to respectively to sulfur trioxide, nitrogen dioxide and gaseous state divalence mercury, organic gas is carried out to oxidative degradation simultaneously, produce carbon dioxide and water.
3. the collaborative method for removing pollutant of a kind of static as claimed in claim 2, is characterized in that, in described step 3, lime powder absorbs sulfur trioxide, nitrogen dioxide, oxidation state mercury and sour gas, the adsorptive gaseous divalence mercury of lime powder.
4. the collaborative method for removing pollutant of a kind of static as claimed in claim 1, is characterized in that, described step 4 medium-high frequency pulse power supply electrostatic precipitator is for collecting particle, the lime powder of flue gas.
5. a static is worked in coordination with device for smoke pollutants, it is characterized in that, comprise smoke inlet, smoke inlet is connected with electrostatic precipitator, electrostatic precipitator is connected with the low temperature plasma generation systems, the low temperature plasma generation systems is connected with the lime powder spraying system, and the lime powder spraying system is connected with high-frequency impulse power supply electrostatic precipitator.
6. a kind of static as claimed in claim 5 is worked in coordination with device for smoke pollutants, it is characterized in that, described lime powder spraying system comprises that lime powder sprays or adsorption zone, be provided with the lime powder storehouse in lime powder injection or adsorption zone, below, lime powder storehouse is connected with the lime powder injection apparatus, and the lime powder injection apparatus is connected with the powder feeding blower fan.
7. the collaborative device for smoke pollutants of a kind of static as claimed in claim 5, is characterized in that, described high-frequency impulse power supply electrostatic precipitator is connected with high-voltage pulse power source.
8. the collaborative device for smoke pollutants of a kind of static as claimed in claim 5, is characterized in that, described electrostatic precipitator is connected with high-voltage DC power supply.
9. the collaborative device for smoke pollutants of a kind of static as claimed in claim 5, is characterized in that, described electrostatic precipitator is the conventional DC electrostatic dust collection device of two electric fields or three electric fields.
10. the collaborative device for smoke pollutants of a kind of static as claimed in claim 5, is characterized in that, described low temperature plasma generation systems is used high pressure pulse discharge or dielectric barrier discharge to produce low temperature plasma.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075335A (en) * | 2014-07-22 | 2014-10-01 | 山东山大能源环境有限公司 | Process and device for realizing up-to-standard emission of boiler flue gas with coupling technology |
| CN105727732A (en) * | 2016-04-21 | 2016-07-06 | 成都华西堂环保科技有限公司 | Flue gas synchronous desulfurization, denitration and dust removal technology combined with cold plasma conversion and sodium alkali method |
| CN106914111A (en) * | 2016-03-18 | 2017-07-04 | 浙江工业大学 | A kind of method of nuisance in nuisance removal device and its removal air-flow |
| CN106984148A (en) * | 2017-04-24 | 2017-07-28 | 河北工业大学 | A kind of method of low-temperature plasma synergistic catalysis oxidation various pollutants in fume |
| CN107051182A (en) * | 2016-03-18 | 2017-08-18 | 浙江工业大学 | A kind of nitrogen oxides removal device and its method for removing nitrogen oxides in air-flow |
| CN107837661A (en) * | 2017-10-25 | 2018-03-27 | 江苏大学 | The apparatus and method that seaweed bio charcoal combination low-temperature plasma synergistic removes sulphur nitre mercury |
| CN108261918A (en) * | 2018-02-07 | 2018-07-10 | 福建龙净环保股份有限公司 | A kind of dust removal integrated equipment of desulphurization denitration and technique |
| CN109806698A (en) * | 2017-11-19 | 2019-05-28 | 江门市安恒爆破工程有限公司 | Engineering explosion dust degradation treatment device |
| CN110115916A (en) * | 2019-01-30 | 2019-08-13 | 浙江大维高新技术股份有限公司 | The tapping equipment and technique of gas boiler flue gas |
| CN115899732A (en) * | 2022-10-26 | 2023-04-04 | 河南省锅炉压力容器安全检测研究院 | Structure for retarding corrosion of pipeline on heating surface of waste incineration boiler |
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| CN101433801A (en) * | 2008-12-02 | 2009-05-20 | 江苏大学 | Pulse electric field activated dry-type calcium-spraying flue gas desulfurization method and apparatus |
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| CN101433801A (en) * | 2008-12-02 | 2009-05-20 | 江苏大学 | Pulse electric field activated dry-type calcium-spraying flue gas desulfurization method and apparatus |
| CN201337881Y (en) * | 2008-12-02 | 2009-11-04 | 江苏大学 | Dry-type calcium-injection flue gas desulfurization device with the activation by pulsed electric field |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075335A (en) * | 2014-07-22 | 2014-10-01 | 山东山大能源环境有限公司 | Process and device for realizing up-to-standard emission of boiler flue gas with coupling technology |
| CN106914111B (en) * | 2016-03-18 | 2019-12-24 | 浙江工业大学 | Harmful substance removing device and method for removing harmful substances in airflow |
| CN106914111A (en) * | 2016-03-18 | 2017-07-04 | 浙江工业大学 | A kind of method of nuisance in nuisance removal device and its removal air-flow |
| CN107051182A (en) * | 2016-03-18 | 2017-08-18 | 浙江工业大学 | A kind of nitrogen oxides removal device and its method for removing nitrogen oxides in air-flow |
| CN105727732A (en) * | 2016-04-21 | 2016-07-06 | 成都华西堂环保科技有限公司 | Flue gas synchronous desulfurization, denitration and dust removal technology combined with cold plasma conversion and sodium alkali method |
| CN106984148A (en) * | 2017-04-24 | 2017-07-28 | 河北工业大学 | A kind of method of low-temperature plasma synergistic catalysis oxidation various pollutants in fume |
| CN107837661A (en) * | 2017-10-25 | 2018-03-27 | 江苏大学 | The apparatus and method that seaweed bio charcoal combination low-temperature plasma synergistic removes sulphur nitre mercury |
| CN109806698A (en) * | 2017-11-19 | 2019-05-28 | 江门市安恒爆破工程有限公司 | Engineering explosion dust degradation treatment device |
| CN108261918A (en) * | 2018-02-07 | 2018-07-10 | 福建龙净环保股份有限公司 | A kind of dust removal integrated equipment of desulphurization denitration and technique |
| CN108261918B (en) * | 2018-02-07 | 2023-12-19 | 福建龙净环保股份有限公司 | Desulfurization, denitrification and dedusting integrated equipment and process |
| CN110115916A (en) * | 2019-01-30 | 2019-08-13 | 浙江大维高新技术股份有限公司 | The tapping equipment and technique of gas boiler flue gas |
| CN115899732A (en) * | 2022-10-26 | 2023-04-04 | 河南省锅炉压力容器安全检测研究院 | Structure for retarding corrosion of pipeline on heating surface of waste incineration boiler |
| CN115899732B (en) * | 2022-10-26 | 2023-07-28 | 河南省锅炉压力容器安全检测研究院 | Structure for slowing down pipeline corrosion of heating surface of garbage incineration boiler |
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Address after: 250061, No. ten, No. 17923, Lixia District, Ji'nan City, Shandong Province Patentee after: SHANDONG University Patentee after: Guoneng (Shandong) energy environment Co.,Ltd. Address before: 250061, No. ten, No. 17923, Lixia District, Ji'nan City, Shandong Province Patentee before: SHANDONG University Patentee before: SHANDONG SHENHUA SHANDA ENERGY ENVIRONMENTAL Co.,Ltd. |