CN111111923A - Dust collecting polar plate for wet electric dust collector - Google Patents
Dust collecting polar plate for wet electric dust collector Download PDFInfo
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- CN111111923A CN111111923A CN202010135568.XA CN202010135568A CN111111923A CN 111111923 A CN111111923 A CN 111111923A CN 202010135568 A CN202010135568 A CN 202010135568A CN 111111923 A CN111111923 A CN 111111923A
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- Prior art keywords
- dust collecting
- electrode plate
- collecting electrode
- plate
- dust
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- 239000000428 dust Substances 0.000 title claims abstract description 112
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 59
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000003546 flue gas Substances 0.000 claims abstract description 19
- 239000012717 electrostatic precipitator Substances 0.000 claims abstract description 5
- 238000005192 partition Methods 0.000 claims description 10
- 239000011152 fibreglass Substances 0.000 claims description 8
- 239000012719 wet electrostatic precipitator Substances 0.000 claims 10
- 230000005684 electric field Effects 0.000 abstract description 6
- 239000003595 mist Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 229910001039 duplex stainless steel Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005686 electrostatic field Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Images
Classifications
-
- 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
- B03C3/02—Plant or installations having external electricity supply
- B03C3/16—Plant or installations having external electricity supply wet type
-
- 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
- B03C3/40—Electrode constructions
- B03C3/45—Collecting-electrodes
- B03C3/49—Collecting-electrodes tubular
Landscapes
- Electrostatic Separation (AREA)
Abstract
本发明涉及一种湿式电除尘器用收尘极板，湿式电除尘器用于对湿烟气进行除尘，收尘极板为中空结构，内部设有空腔，收尘极板一外侧底部设有进水口，另一外侧顶部设有出水口，进水口与出水口均与空腔连通，本发明将收尘极板设置为中空结构并通入低温循环水，使收尘极板表面温度降低，湿烟气中的粉尘和雾滴，在电场力的作用下迁移，将荷电的粉尘及雾滴收集在收尘极板上，雾滴受冷凝结，在收尘极表面形成大量的自流连续的水膜，实现收尘极表面清灰，同时可去除烟气中的水分。
The invention relates to a dust collecting electrode plate for a wet type electrostatic precipitator. The wet type electrostatic precipitator is used for dust removal of wet flue gas. The dust collecting electrode plate is a hollow structure with a cavity inside. The water outlet and the top of the other outer side are provided with a water outlet, and the water inlet and the water outlet are both connected to the cavity. The dust and mist droplets in the flue gas migrate under the action of the electric field force, and the charged dust and mist droplets are collected on the dust collector plate. The water film can realize the dust removal on the surface of the dust collector, and at the same time remove the moisture in the flue gas.
Description
Technical Field
The invention relates to a dust collecting polar plate for a wet electric dust collector, and belongs to the field of wet electric dust collectors.
Background
The wet electric dust collector is mainly used for removing harmful substances such as dust, acid mist and the like in wet flue gas after a desulfurizing tower in the power industry, and is environment-friendly equipment for treating the emission of atmospheric pollutants in a thermal power plant.
The existing wet electric dust collector is used for removing pollutants such as dust, sulfuric acid mist and the like in wet flue gas. One of the wet electric dust collectors is a wet electric dust collector of conductive glass fiber reinforced plastic, which is washed with water to remove dust adsorbed on an anode plate. The dust collecting electrode is made of conductive glass fiber reinforced plastic, the discharge electrodes are made of metal alloy, and each discharge electrode is placed in the center of the dust collecting electrode. When the dust collector works, smoke is ionized through a strong electric field generated by a high-voltage current direct current power supply, corona discharge is generated, dust and fog drops in wet smoke are charged and migrate under the action of the electric field force, and the charged dust and fog drops are collected on the conductive glass fiber reinforced plastic dust collecting electrode. And after the fog drops are collected, a small amount of self-flowing continuous water film is formed on the surface of the dust collecting electrode, so that dust removal on the surface of the dust collecting electrode is realized. And adopts intermittent spraying technology to realize the ash removal of the anode and the cathode. The existing wet-type electric dust collector also has some defects: because the flue gas temperature is higher, the surface temperature of the dust collection pole plate is raised, only a small amount of fog drops are condensed on the surface of the dust collection pole plate, the amount of generated water film is less, the dust removal of the anode and the cathode needs to be matched with an intermittent spraying technology, and the electric energy and the water energy are increased. The electric field stops running during spraying, and the whole-time operation cannot be kept. Fire accidents also occur in the conductive glass fiber reinforced plastic wet electric dust collector.
The patent with application number 2012105535494 in the prior art provides an electrostatic dust collection device and method for a hollow polar plate made of porous medium materials, the device adopts the hollow polar plate made of porous medium materials, after water is introduced, the water passes through the porous medium materials to form a water film on the surface of the polar plate, particles deposited on the surface of the polar plate under the action of an electrostatic field are collected, when more particles which are difficult to remove are deposited on the surface of the polar plate, gas is introduced into the polar plate, and the gas passes through the porous medium materials to form a transient gas film on the surface of the polar plate, so that the particles are removed. Water inlet and air supply are alternately carried out. The technical scheme has the following disadvantages: the water is pressed to the outside of the polar plate to form a water film through the self gravity of the water, and the porous material to be adopted has the characteristic that the pore diameter is gradually reduced from the top end of the polar plate to the top, so that the design requirement is high and the difficulty is high; meanwhile, the introduced water can not be recycled due to the formation of a water film carrying particles, and water resources are wasted; the porous structure is easy to collect particles and needs to be cleaned regularly.
Disclosure of Invention
The invention provides a dust collecting polar plate for a wet electric dust collector, which is used for forming a large amount of water films by using fog drops in wet flue gas to solve the problems in the prior art.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: the utility model provides a wet-type electrostatic precipitator is with polar plate that gathers dust, wet-type electrostatic precipitator is used for removing dust wet flue gas, the polar plate that gathers dust is hollow structure, and inside is equipped with the cavity, and a polar plate outside bottom of gathering dust is equipped with the water inlet, and another outside top is equipped with the delivery port, the water inlet all communicates with the cavity with the delivery port.
The technical scheme is further designed as follows: and low-temperature circulating water is introduced into the cavity.
The dust collecting polar plate is vertically arranged, and wet flue gas passes through the dust collecting polar plate from top to bottom.
The dust collecting polar plate comprises six sub-polar plates, and is in a tubular shape surrounded by the six sub-polar plates, and the cross section of the dust collecting polar plate is in a regular hexagon shape.
The dust collecting polar plate comprises four sub-polar plates, and is in a tubular shape surrounded by the four sub-polar plates, and the cross section of the dust collecting polar plate is square.
The water inlet and the water outlet are respectively arranged on two opposite side surfaces of the dust collecting polar plate.
The dust collecting polar plate is divided into an inner plate and an outer plate by the cavity, a plurality of partition plates are arranged in the cavity, and two sides of each partition plate are fixedly connected with the inner plate and the outer plate respectively.
The length of the partition board is smaller than the width of the sub-pole plate, and the partition boards are arranged on two sides inside the sub-pole plate at intervals.
And polar lines are arranged at the central axis of the dust collecting polar plate.
The dust collecting polar plate is made of conductive glass fiber reinforced plastic materials.
Compared with the prior art, the invention has the distinguishing technical characteristics that:
according to the invention, the dust collecting pole plate is arranged to be a hollow structure, and low-temperature circulating water is introduced, so that the surface temperature of the dust collecting pole plate is reduced, dust and fog drops in wet flue gas migrate under the action of an electric field force, charged dust and fog drops are collected on the dust collecting pole plate, the fog drops are condensed by cooling, a large amount of self-flowing continuous water films are formed on the surface of the dust collecting pole plate, the dust cleaning of the surface of the dust collecting pole is realized, and meanwhile, the moisture in the flue gas can be removed; because the water film formed after condensation of the fog drops has large amount, a flushing device is not required to be arranged to clean the dust collecting polar plate regularly, water and energy are saved, and the full-time operation of an electric field is ensured.
The low water introduced into the dust collecting polar plate in the invention is not contacted with particulate matters such as dust in the flue gas, can be recycled, and saves water resources.
The dust collecting polar plate has the advantages of simple structure, easy manufacture and low manufacturing cost.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a rear view of FIG. 1;
FIG. 3 is a cross-sectional view of a first embodiment of the present invention;
FIG. 4 is a cross-sectional view of the neutron plate of FIG. 1;
FIG. 5 is a cross-sectional view of the neutron plate of FIG. 4 in the direction A-A;
fig. 6 is a schematic structural diagram of a second embodiment of the present invention.
In the figure: 1-dust collecting polar plate, 11-inner plate, 12-outer plate, 3-clapboard, 2-cavity, 3-water inlet, 4-water outlet and 5-polar line.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
Example one
As shown in fig. 1, the dust collecting polar plate for the wet electric dust collector of the present embodiment is used for removing dust from wet flue gas, the dust collecting polar plate 1 is made of conductive glass fiber reinforced plastic material, and is in a hexagonal tube shape, and a cross section of the dust collecting polar plate is in a regular hexagon shape, and as shown in fig. 3, the dust collecting polar plate 1 in the present embodiment is in a hollow structure, and a cavity 2 is arranged inside the dust collecting polar plate.
Referring to fig. 2, a water inlet 3 is arranged at the bottom of one outer side of the dust collecting polar plate 1, a water outlet 4 is arranged at the top of the other outer side opposite to the water inlet, and the water inlet 3 and the water outlet 4 can be both communicated with the cavity 2; the water inlet 3 can be connected with a water outlet of a low-temperature circulating water pump, and the water outlet 4 is connected with a water inlet of the low-temperature circulating water pump, so that circulating water flowing from bottom to top is formed in the cavity 2 of the dust collecting polar plate 1. The surface temperature of the dust collection pole plate 1 is reduced by the low-temperature circulating water, so that the flow speed of wet flue gas is reduced, collected fog drops can be condensed, a large amount of self-flowing continuous water films are formed on the surface of the dust collection pole plate, water in the wet flue gas is effectively removed, the removal rate of fine particulate matters PM2.5 is improved, the sulfur trioxide removal rate is improved, the removal of flue gas pollutants and soluble particulate matters is enhanced, and the moisture removal efficiency is improved. If the conductive glass fiber reinforced plastic dust collection polar plate catches fire, the low-temperature circulating water and the condensed water film can extinguish the fire automatically, thereby effectively preventing fire and reducing safety risk.
This embodiment still can set up condensing equipment on low temperature circulating water pump's outlet pipe, cools down the circulation.
The dust collecting polar plate 1 of the embodiment is vertically arranged in the wet electric dust collector and is an anode dust collecting pole, and wet flue gas passes through the dust collecting polar plate 1 from top to bottom. The central axis of the dust collecting polar plate 1 is provided with a cathode polar line 5, and the polar line 5 is made of duplex stainless steel 2205 materials or other stainless steel materials.
As shown in fig. 4 and 5, the dust collecting electrode plate 1 in this embodiment is surrounded by six rectangular sub-electrode plates, the dust collecting electrode plate 1 is divided into an inner plate 11 and an outer plate 12 by the cavity 2, a plurality of partition plates 13 are arranged in the cavity 2, and both sides of each partition plate 13 are respectively fixedly connected with the inner plate 11 and the outer plate 12, so that after the cavity 2 is arranged in the dust collecting electrode plate 1, the thicknesses of the inner plate and the outer plate are reduced, the overall strength of the dust collecting electrode plate 1 is reduced, and the overall strength of the dust collecting electrode plate 1 can be; the length of the partition board 13 is smaller than the width of the sub-pole plate, and the partition boards are arranged at intervals on two sides inside the sub-pole plate, so that the cavity 2 is partitioned into an S shape in the range of the sub-pole plate, the path of low-temperature circulating water can be prolonged, and the cooling effect is improved.
The thickness of the plate wall of the dust collection polar plate is about 9-15 mm.
The thickness of the cavity in the dust collection polar plate is about 4-7 mm.
Example two
As shown in fig. 6, the dust collecting electrode plate structure domain of the wet type electric dust collector of the embodiment is basically the same, except that the dust collecting electrode plate 1 is tubular and has a square cross section.
The technical solutions of the present invention are not limited to the above embodiments, and all technical solutions obtained by using equivalent substitution modes fall within the scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010135568.XA CN111111923A (en) | 2020-03-02 | 2020-03-02 | Dust collecting polar plate for wet electric dust collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010135568.XA CN111111923A (en) | 2020-03-02 | 2020-03-02 | Dust collecting polar plate for wet electric dust collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111111923A true CN111111923A (en) | 2020-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010135568.XA Pending CN111111923A (en) | 2020-03-02 | 2020-03-02 | Dust collecting polar plate for wet electric dust collector |
Country Status (1)
| Country | Link |
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| CN (1) | CN111111923A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111545019A (en) * | 2020-05-20 | 2020-08-18 | 中国船舶重工集团公司第七0三研究所 | A shrinkage cooling ion wind mist droplet trapping device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003095095A1 (en) * | 2002-05-09 | 2003-11-20 | Ohio University | Membrane laminar wet electrostatic precipitator |
| CN103008109A (en) * | 2012-12-18 | 2013-04-03 | 清华大学 | Hollow polar plate electrostatic dust removing device made of porous medium material and method |
| CN110354998A (en) * | 2019-07-19 | 2019-10-22 | 福建龙净环保股份有限公司 | Water-saving wet electrical dust precipitator and its anode system, heat exchange anode plate |
-
2020
- 2020-03-02 CN CN202010135568.XA patent/CN111111923A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003095095A1 (en) * | 2002-05-09 | 2003-11-20 | Ohio University | Membrane laminar wet electrostatic precipitator |
| CN103008109A (en) * | 2012-12-18 | 2013-04-03 | 清华大学 | Hollow polar plate electrostatic dust removing device made of porous medium material and method |
| CN110354998A (en) * | 2019-07-19 | 2019-10-22 | 福建龙净环保股份有限公司 | Water-saving wet electrical dust precipitator and its anode system, heat exchange anode plate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111545019A (en) * | 2020-05-20 | 2020-08-18 | 中国船舶重工集团公司第七0三研究所 | A shrinkage cooling ion wind mist droplet trapping device |
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