CN204018028U - A kind of high-efficient wet-type electric precipitation purifier of wet-method desulfurized fume - Google Patents
A kind of high-efficient wet-type electric precipitation purifier of wet-method desulfurized fume Download PDFInfo
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- CN204018028U CN204018028U CN201420488710.9U CN201420488710U CN204018028U CN 204018028 U CN204018028 U CN 204018028U CN 201420488710 U CN201420488710 U CN 201420488710U CN 204018028 U CN204018028 U CN 204018028U
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- Prior art keywords
- flue gas
- wet
- several
- dust collection
- purification device
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- 238000000034 method Methods 0.000 title description 25
- 239000003517 fume Substances 0.000 title description 13
- 238000001556 precipitation Methods 0.000 title description 7
- 239000000428 dust Substances 0.000 claims abstract description 59
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000003546 flue gas Substances 0.000 claims abstract description 35
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 17
- 230000023556 desulfurization Effects 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical class O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 238000000746 purification Methods 0.000 claims abstract 11
- 239000007788 liquid Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000012719 wet electrostatic precipitator Substances 0.000 claims 9
- 238000005507 spraying Methods 0.000 claims 2
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 239000011521 glass Substances 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 238000009833 condensation Methods 0.000 abstract description 23
- 230000005494 condensation Effects 0.000 abstract description 23
- 239000002245 particle Substances 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 12
- 230000008859 change Effects 0.000 abstract description 7
- 230000005684 electric field Effects 0.000 abstract description 6
- 229920006395 saturated elastomer Polymers 0.000 abstract description 2
- 239000012071 phase Substances 0.000 description 12
- 238000001816 cooling Methods 0.000 description 9
- 239000002253 acid Substances 0.000 description 8
- 239000003595 mist Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 238000006555 catalytic reaction Methods 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- 230000007704 transition Effects 0.000 description 6
- 239000013618 particulate matter Substances 0.000 description 5
- 230000009466 transformation Effects 0.000 description 5
- 239000000443 aerosol Substances 0.000 description 4
- 229910052602 gypsum Inorganic materials 0.000 description 4
- 239000010440 gypsum Substances 0.000 description 4
- 239000012808 vapor phase Substances 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 235000019628 coolness Nutrition 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 239000012716 precipitator Substances 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical class N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005367 electrostatic precipitation Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
本实用新型公开了一种湿法脱硫后烟气的高效湿式电除尘净化装置。该装置包括自下向上依次设置在壳体中的气体进口、换热管、数个增湿喷嘴、阴极固定框架、数个集尘管、数个清洗喷嘴和气体出口，其中，数个集尘管上、下两端分别与上花板和下花板密封连接，组成集尘管束；数条放电极线分别内置于集尘管，由阴极固定框架固定；所述阴极固定框架与壳体外的高压电源连接。净化湿法脱硫后烟气时，烟气由气体进口通入装置，经换热管降温及增湿喷嘴喷淋增湿降温后达到饱和或过饱和水汽状态；烟气经过集尘管内发生水汽凝结相变，微粒在电场力作用下被收集到集尘管内表面。本实用新型集水汽凝结相变与湿式电除尘于一体，能达到湿法脱硫后烟气的深度净化效果。
The utility model discloses a high-efficiency wet electric dust removal and purification device for flue gas after wet desulfurization. The device includes a gas inlet, a heat exchange tube, several humidifying nozzles, a cathode fixing frame, several dust collecting pipes, several cleaning nozzles and a gas outlet arranged in the shell in sequence from bottom to top, among which several dust collecting The upper and lower ends of the tube are sealed and connected with the upper flower plate and the lower flower plate respectively to form a dust collection tube bundle; several discharge electrode wires are respectively built into the dust collection tube and fixed by the cathode fixed frame; High voltage power connection. When purifying the flue gas after wet desulfurization, the flue gas enters the device from the gas inlet, and reaches a saturated or supersaturated water vapor state after being cooled by the heat exchange tube and sprayed by the humidification nozzle; the flue gas passes through the dust collection pipe and condenses Phase change, the particles are collected to the inner surface of the dust collection tube under the action of the electric field force. The utility model integrates water vapor condensation phase change and wet electric dust removal, and can achieve the effect of deep purification of flue gas after wet desulfurization.
Description
Technical field
The utility model relates to a kind of high-efficient wet-type electric precipitation purifier of wet-method desulfurized fume, belongs to air pollution control technique field.
Background technology
At present, coal burning flue gas desulfurization mainly adopts Wet Flue Gas Desulfurization Technique.In service at wet desulfurization system, unavoidably produce SO
3acid mist, slurry drops aerosol, or the PM such as ammonia salt aerosol
2.5, health and environment are caused to serious harm; The anticorrosion cost of follow-up equipment improves thereupon.
Early stage wet desulfurization system is all equipped with flue gas heat-exchange unit (GGH) as in limestone-gypsum method process system, to add clean flue gas after thermally desulfurizing, improves atmosphere hoist height, is conducive to flue gas diffusion, has effectively avoided " gypsum rain " phenomenon.But in actual moving process, GGH easily produces obstruction, etching problem, has a strong impact on the safe operation of system.At present, exceed 70% WFGD system and cancel GGH.But cancel after GGH, around chimney, produce significantly " gypsum rain ", surrounding enviroment are produced to severe contamination.
A PM of coal-burning power plant's discharge
2.5superfine particulate matter is divided into the PM that directly solid-state (or liquid) form is discharged
2.5superfine particulate matter, and discharging with gaseous state or vapor form under flue-gas temperature state condenses into the condensation type PM of solid-state (or liquid) in the dilution of plume and cooling procedure
2.5superfine particulate matter.These condensation type particles are (as SO
3acid mist, HCl, NH
3, steam) be the precursor of gray haze mostly, the impact of power plant's surrounding enviroment be can not ignore.
At present, traditional wet electrical dust precipitator technology can effectively trap fine particle (PM
2.5dust, SO
3acid mist, aerosol), heavy metal (Hg, As, Se, Pb, Cr); To PM
2.5the arresting efficiency of particle is more than 98%, and soot emissions can reach 10mg/m
3even 5mg/m
3below; Can effectively solve the landscape pollution problem such as pipe-line equipment corrosion and " gypsum rain " that wet desulfurization system brings.But (m) the endocorpuscular arresting efficiency of particle size range is lower for≤1 μ, limited in one's ability to the removal of condensation type particle (gray haze precursor) to sub-micron for traditional wet electric cleaner.Therefore, be further deep purifying wet-method desulfurized fume, need to strengthen the removal capacity of wet electrical dust precipitator to superfine particulate matter and condensation type particle.
Utility model content
The purpose of this utility model is to provide a kind of high-efficient wet-type electric precipitation purifier of wet-method desulfurized fume, and this device catchments vapour condensation phase change and wet-esp in one, and compact conformation can reach the deep purifying effect of coal-burning boiler wet-method desulfurized fume.
For achieving the above object, the utility model is by the following technical solutions:
A kind of high-efficient wet-type electric precipitation purifier of wet-method desulfurized fume, this device comprises bottom-up gas feed, heat exchanger tube, several humidifying nozzle, negative electrode fixed frame, several dust leg, several washer jet and the gas vent being successively set in housing, wherein, several dust leg upper/lower terminals are tightly connected with upper face plate and lower face plate respectively, the tube bank of composition control of dust; Several discharge plumes are built in respectively dust leg, are fixed by negative electrode fixed frame; Described negative electrode fixed frame is connected with the high voltage source outside housing.
In purifier of the present utility model, described heat exchanger tube can be common pipe, and in order to increase the external surface area of heat exchanger tube, improves heat exchange efficiency, also can select finned tube; Further, for optimization airflow distributes, described heat exchanger tube is stratiform setting in housing.In heat exchanger tube using air or water as heat catalysis.
Preferably, described dust leg material is stainless steel or electroconductive frp, and its cross section is circle or regular polygon.
Preferably, the internal diameter of described circular cross section or the inscribed circle diameter of regular polygon are 200mm～800mm.
Preferably, in order to increase the external surface area of dust leg, improve heat exchange efficiency, the outer wall of described dust leg is provided with fin.
Preferably, the control of dust tube bank of described several dust legs composition is for single-stage or be made up of plural serial stage, between dust leg outer wall using air or water as heat catalysis.
Preferably, described humidifying nozzle adopts the mode of operation of spray continuously, and described washer jet adopts the mode of operation of intermittent shower.
Preferably, described hull outside is provided with liquid circulation pump, and this liquid circulation pump is connected to humidifying nozzle and washer jet by liquid line, and the liquid that takes this housing bottom is received is recycled.
Adopt the utility model to purify the process of wet-method desulfurized fume to be: the flue gas after coal-burning boiler wet desulphurization by air inlet access to plant after, through heat exchanger tube heat exchange cooling, approach saturation vapour state; After humidifying nozzle further sprays humidification, cooling, reach capacity or supersaturated vapor state; When flue gas passes through dust leg, between dust leg outer wall, cool as heat catalysis using air or water, the phase transformation of flue gas generation condensation vapor, most condensation type particles are (as SO
3acid mist, HCl, NH
3, steam) form liquid-state soluble (or solid-state) particulate; In phase transition process, supersaturated vapor is with PM
2.5condense for the nuclei of condensation undergo phase transition, make PM
2.5particle diameter increases, mass penalty; In condensation phase change, these particulates are collected into dust leg inner surface under electric field force effect, and flue gas reaches the effect of deep purifying.
The beneficial effects of the utility model are:
1) the utility model makes full use of the synergy of condensation vapor phase transformation and high voltage electric field, effectively strengthen wet-esp to superfine particulate matter and condensation type particle (as SO
3acid mist, HCl, NH
3, steam) deep purifying performance.By condensation vapor phase transformation, most condensation type particles are (as SO
3acid mist, HCl, NH
3, steam) form liquid-state soluble (or solid-state) particulate; PM
2.5especially the particle diameter of submicron particles increases, and charged ability strengthens, and under the effect of electric field force, arresting efficiency improves.
2) after wet desulphurization, exit gas temperature is conventionally at 45 DEG C～60 DEG C, and water capacity is up to 90%～95%, makes the flue gas state that reaches capacity, and cooling 1～2 DEG C of flue gas can reach.By heat exchanger tube heat exchange, humidifying nozzle humidification, cooling, dust leg bundle indirect heat exchange, can realize the hypersaturated state of flue gas.
3) heat exchanger tube adopts after layered arrangement, can play the effect that optimization airflow distributes; The humidifying nozzle adopting sprays continuously, can play the effect of cleaning heat exchange pipe external surface, prevents dust stratification, fouling, is conducive to keep the stable of heat exchange property.
4) compared with traditional wet electrostatic precipitation technology, the utility model catchments vapour condensation phase change and wet-esp in one, and compact conformation can reach the deep purifying effect of coal-burning boiler wet-method desulfurized fume.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model high-efficient wet-type electric precipitation purifier;
Fig. 2 is the structural representation of circular control of dust tube bank;
Fig. 3 is the structural representation of square control of dust tube bank;
Fig. 4 is the structural representation of regular hexagon control of dust tube bank;
Fig. 5 is the structural representation of circular control of dust tube bank plural serial stage;
Fig. 6 is the structural representation of heat exchanger tube combination.
Reference numeral: 1, gas feed, 2, heat exchanger tube, 3, humidifying nozzle, 4, negative electrode fixed frame, 5, dust leg, 6, discharge plume, 7, insulated case, 8, gas vent, 9, washer jet, 10, high voltage source, 11, upper face plate, 12, valve, 13, lower face plate, 14, liquid circulation pump
Detailed description of the invention
As shown in Figure 1, the high-efficient wet-type electric precipitation purifier of wet-method desulfurized fume of the present utility model comprises bottom-up gas feed 1, heat exchanger tube 2, several humidifying nozzle 3, negative electrode fixed frame 4, several dust leg 5, several washer jet 9, insulated case 7 and the gas vent 8 being successively set in housing, wherein, in conjunction with as shown in Figure 2,3, 4, several dust leg 5 upper/lower terminals are tightly connected with upper face plate 11 and lower face plate 13 respectively, the tube bank of composition control of dust; Several discharge plumes 6 are built in respectively dust leg 5, fixing by negative electrode fixed frame 4; Negative electrode fixed frame 4 is connected with the high voltage source 10 outside housing.
After flue gas access to plant, first will lower the temperature through heat exchanger tube 2, heat exchanger tube 2 can be common pipe, and in order to increase the external surface area of heat exchanger tube, improves heat exchange efficiency, also can select finned tube, as shown in Figure 6.Further, for optimization airflow distributes, described heat exchanger tube is stratiform setting in housing.In heat exchanger tube using air or water as heat catalysis.
Flue gas after heat exchanger tube 2 coolings approaches saturation vapour state, after humidifying nozzle 3 further sprays humidification, cooling, reaches capacity or supersaturated vapor state, and humidifying nozzle 3 adopts the mode of operation of spray continuously.Saturated or supersaturated vapor state flue gas enters dust leg 5, and condensation vapor phase transformation occurs, and most condensation type particles are (as SO
3acid mist, HCl, NH
3, steam) form liquid-state soluble (or solid-state) particulate; In phase transition process, supersaturated vapor is with PM
2.5condense for the nuclei of condensation undergo phase transition, make PM
2.5particle diameter increases, mass penalty; In condensation phase change, these particulates are collected into dust leg 5 inner surfaces under electric field force effect, and flue gas reaches the effect of deep purifying.
The material of dust leg 5 is stainless steel or electroconductive frp, and its cross section is circular (as shown in Figure 2) or regular polygon, as square (as shown in Figure 3), regular hexagon (as shown in Figure 4).Wherein, the internal diameter of circular cross section or the inscribed circle diameter of regular polygon are that 200mm～800mm is advisable.In order to increase the external surface area of dust leg, improve heat exchange efficiency, the outer wall of described dust leg is provided with fin.The control of dust tube bank that several dust legs 5 form can be single-stage, also can be made up of plural serial stage, as shown in Figure 5.Heat catalysis between dust leg outer wall can be air or water.
After flue gas passes through dust leg 5, PM
2.5the superfine particulate matters such as particulate are collected in dust leg 5 inner surfaces, and the moisture film that wherein part particle forms by dust leg 5 inner surfaces is washed in the ash bucket of device bottom, and remainder can adopt the mode of operation periodic cleaning of intermittent shower to remove by washer jet 9.
Liquid from humidifying nozzle and washer jet ejection is collected in housing bottom, is provided with liquid circulation pump and be arranged on hull outside, liquid-circulating to humidifying nozzle and washer jet can be recycled.
Utilize said apparatus to purify the method for wet-method desulfurized fume as follows:
1) coal-burning boiler wet-method desulfurized fume by gas feed 1 access to plant after, after heat exchanger tube 2 heat exchange coolings, approach saturation vapour state; After humidifying nozzle 3 further sprays humidification, cooling, reach capacity or supersaturated vapor state; When flue gas passes through dust leg 5, the heat catalysis through between dust leg 5 outer walls cools, and condensation vapor phase transformation occurs, and most condensation type particles are (as SO
3acid mist, HCl, NH
3, steam) form liquid-state soluble (or solid-state) particulate; In phase transition process, supersaturated vapor is with PM
2.5condense for the nuclei of condensation undergo phase transition, make PM
2.5particle diameter increases, mass penalty; In condensation phase change, these particulates are collected into dust leg 5 inner surfaces under electric field force effect, and flue gas reaches the effect of deep purifying.In this process, control the interior flue gas flow rate of dust leg 5 at 0.5～3m/s, the time of staying is at 2～12s.
2) PM that dust leg 5 inwalls are collected
2.5particulate, the moisture film forming by dust leg 5 inner surfaces except part is washed in the ash bucket of device bottom, and remainder is removed by washer jet 9 periodic cleanings.
Adopt said apparatus to purify wet-method desulfurized fume, PM
2.5concentration of emission is lower than 5mg/Nm
3, SO
3aerosol concentration is lower than 3mg/Nm
3.
Claims (9)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420488710.9U CN204018028U (en) | 2014-08-27 | 2014-08-27 | A kind of high-efficient wet-type electric precipitation purifier of wet-method desulfurized fume |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420488710.9U CN204018028U (en) | 2014-08-27 | 2014-08-27 | A kind of high-efficient wet-type electric precipitation purifier of wet-method desulfurized fume |
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| Publication Number | Publication Date |
|---|---|
| CN204018028U true CN204018028U (en) | 2014-12-17 |
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ID=52057941
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|---|---|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104226479A (en) * | 2014-08-27 | 2014-12-24 | 中国环境科学研究院 | Efficient wet type electric dedusting and purifying device and method for smoke obtained after wet desulphurization |
| CN108079714A (en) * | 2017-12-06 | 2018-05-29 | 宁波市江北义盈工贸有限公司 | A kind of boiler dust-extraction unit |
| CN109590112A (en) * | 2019-01-22 | 2019-04-09 | 国电环境保护研究院有限公司 | A kind of phase transformation electric dust removing system |
| CN110624340A (en) * | 2019-09-18 | 2019-12-31 | 东南大学 | A dedusting pretreatment device and method based on phase change of water vapor charge |
-
2014
- 2014-08-27 CN CN201420488710.9U patent/CN204018028U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104226479A (en) * | 2014-08-27 | 2014-12-24 | 中国环境科学研究院 | Efficient wet type electric dedusting and purifying device and method for smoke obtained after wet desulphurization |
| CN108079714A (en) * | 2017-12-06 | 2018-05-29 | 宁波市江北义盈工贸有限公司 | A kind of boiler dust-extraction unit |
| CN109590112A (en) * | 2019-01-22 | 2019-04-09 | 国电环境保护研究院有限公司 | A kind of phase transformation electric dust removing system |
| CN110624340A (en) * | 2019-09-18 | 2019-12-31 | 东南大学 | A dedusting pretreatment device and method based on phase change of water vapor charge |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141217 Termination date: 20170827 |