CN116713114A - Dust collection polar plate of wet electric precipitator with uniformly distributed liquid film and liquid film distribution method - Google Patents
Dust collection polar plate of wet electric precipitator with uniformly distributed liquid film and liquid film distribution method Download PDFInfo
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- CN116713114A CN116713114A CN202310988152.6A CN202310988152A CN116713114A CN 116713114 A CN116713114 A CN 116713114A CN 202310988152 A CN202310988152 A CN 202310988152A CN 116713114 A CN116713114 A CN 116713114A
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- dust collecting
- flushing water
- polar plate
- liquid film
- collecting polar
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- 239000000428 dust Substances 0.000 title claims abstract description 160
- 239000007788 liquid Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000012716 precipitator Substances 0.000 title claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 184
- 238000011010 flushing procedure Methods 0.000 claims abstract description 99
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 4
- 238000000926 separation method Methods 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 abstract description 15
- 239000000779 smoke Substances 0.000 abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052742 iron Inorganic materials 0.000 abstract description 3
- 238000005245 sintering Methods 0.000 abstract description 3
- 238000000746 purification Methods 0.000 abstract description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 4
- 239000012718 dry electrostatic precipitator Substances 0.000 description 4
- 239000012719 wet electrostatic precipitator Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 239000010883 coal ash Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- -1 PM2.5 Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- 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
- B03C3/47—Collecting-electrodes flat, e.g. plates, discs, gratings
-
- 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
- B03C3/74—Cleaning the electrodes
- B03C3/78—Cleaning the electrodes by washing
-
- 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
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
Abstract
The invention discloses a dust collecting polar plate of a wet electric dust collector with uniformly distributed liquid films and a liquid film distribution method, comprising a dust collecting polar plate which is vertically arranged and a flushing water distributor which is arranged at the upper end of the dust collecting polar plate, wherein vertical dividing strips are arranged on the dust collecting polar plate side by side, and the surface of the dust collecting polar plate is divided into a plurality of liquid film flowing areas along the vertical direction through the vertical dividing strips; a flushing water redistributor for stabilizing the flow speed of water flow is arranged on the dust collecting polar plate along the horizontal direction; according to the invention, the washing water redistributors are arranged on the dust collecting polar plates, and the washing water is slowed down and distributed again through the washing water redistributors, so that the flow rate of the washing water reaching the lower end of the dust collecting polar plates can be reduced, and the tearing of a water film caused by too fast flow rate is avoided, thereby increasing the design height of the dust collecting polar plates, greatly reducing the width of the polar plates and the number of channels, reducing the occupied area, improving the space utilization rate, and being applicable to large smoke amount dust removal and purification occasions such as large thermal power units, large steel-iron sintering machines and the like.
Description
Technical Field
The invention relates to the technical field of dust removal equipment, in particular to a dust collection polar plate of a wet electric dust collector with uniformly distributed liquid films and a liquid film distribution method.
Background
Currently, dust removal technologies for industrial applications are various, such as dry electrostatic precipitators, bag house dust collectors or electric bag house dust collectors are commonly used in thermal power plants. The dry electrostatic precipitator has the advantages of higher dust removal efficiency, small pressure loss, wide application range, safe and reliable equipment, lower equipment investment and operation cost and good economical efficiency. However, the dust collection efficiency is greatly affected by the components and properties of coal and fly ash, and in addition, the dry electrostatic precipitator mainly relies on vibration to remove dust adsorbed on a dust collection polar plate, so that secondary dust emission is easily caused to reduce the efficiency. The bag type dust collector has the advantages of being free from the influence of the components and properties of coal and fly ash, high and stable in dust collection efficiency, capable of collecting fine dust, heavy metals and the like, and meeting the environmental protection development emission requirements in the future. However, the system has the defects of large pressure loss, sensitivity to flue gas temperature and components, easy breakage of filter bags and excessive emission if the system is improperly used, and low resource utilization rate of the old filter bags at present, and high running cost although the investment of the whole equipment is low.
With the continuous trend of environmental protection requirements, the emission control requirements on various composite pollutants such as PM2.5, acid mist, aerosol, heavy metal and the like are greatly improved. The wet electrostatic precipitator can meet the requirement of comprehensive control of the pollutants, and has the electrostatic adsorption principle similar to that of the traditional dry electrostatic precipitator, except that the wet electrostatic precipitator adopts a liquid film which uniformly and continuously flows to be distributed on the dust collecting polar plate so as to carry away dust particles trapped on the polar plate. Therefore, secondary dust caused by oscillation is thoroughly eliminated, secondary dust caused by back corona can be avoided for dust with high specific resistance, and escape phenomenon of dust with low specific resistance is eliminated. Therefore, the wet electric dust collector can achieve very high dust collection efficiency, and the dust emission concentration can be controlled below 5mg/Nm3, so that the world strictest emission standard requirement is met.
Wet electrostatic precipitators are a dust collection technology commonly used in chemical industry, metallurgy industry and the like, and are generally classified into plate type and pipe type structures according to the type of dust collection polar plates.
The anode (i.e. dust collecting polar plate) of the wet electric dust collector with a traditional tubular structure is generally of a tubular structure (also of a circular tubular structure) with a regular hexagon cross section, a cathode discharge electrode wire passes through the middle of the tube, smoke passes through the tube, dust is adsorbed on the anode plate (i.e. the inner wall of the tube) under the action of an electric field, and then the dust is removed by flushing a water film. Because of the large number of parallel tube bundles and the complex structure of the wet electric dust collector with the tubular structure, particularly, the difficulty and the workload of accurate positioning are large when thousands of cathode wires are installed, the implementation difficulty is large in large-scale flue gas amount application occasions.
The plate-type wet electric dust collector anode (i.e. dust collecting polar plate) is generally of a plate-shaped structure, a plurality of cathode discharge wires pass through between two adjacent plates at equal intervals, flue gas passes through between the two plates, dust is adsorbed on an anode plate (i.e. a plate wall) under the action of an electric field, and then the dust is removed by flushing a water film. The wet electrostatic precipitator with the plate structure is relatively simple in structure, but the flushing water film on the wall surface of the anode plate flows from top to bottom under the action of gravity, so that the plate wall surface with large wall surface and large height is always torn, converged and the like on the surface of the plate along with the acceleration of water flow speed from top to bottom, the probability of occurrence is higher when the height of the plate is higher and the water flow speed is higher, so that a complete and uniform water film cannot be formed below the plate, and therefore, places are not covered by the water film, dust in the places cannot be cleaned, the dust is accumulated more and thicker, discharge between a dust layer and the electrode occurs, and the condition that the electric precipitator cannot normally supply power is caused. Therefore, the height of the polar plate of the existing wet electric dust collector generally cannot exceed 6m, and for a certain scale project, the height is reduced under the condition that the total area of the polar plate is fixed, and the dust collection effect can only be ensured by increasing the width (the length along the flue gas direction) of the polar plate, so that the general wet electric dust collector is short and fat, occupies large area and cannot process large flue gas amount.
Therefore, an important problem faced by popularization and application of wet electric dust collectors in large-scale flue gas amount, especially thermal power plants, is that the occupied area needs to be effectively reduced so as to adapt to the transformation of the existing thermal power environmental protection facilities and reduce the investment of the whole system.
Disclosure of Invention
The technical purpose is that: aiming at the defects of the existing wet electric dust collector, the invention discloses a dust collection polar plate of the wet electric dust collector with uniformly distributed liquid film and a liquid film distribution method.
The technical scheme is as follows: in order to achieve the technical purpose, the invention adopts the following technical scheme:
the wet electric dust collector dust collecting polar plate comprises a dust collecting polar plate which is vertically arranged and a flushing water distributor which is arranged at the upper end of the dust collecting polar plate, wherein vertical dividing strips are arranged on the dust collecting polar plate side by side, and the surface of the dust collecting polar plate is divided into a plurality of liquid film flowing areas along the vertical direction through the vertical dividing strips; and a flushing water redistributor for stabilizing the flow speed of water flow is arranged below the flushing water distributor on the dust collecting polar plate along the horizontal direction.
Preferably, the vertical separation strips are arranged in a plurality of rows along the height direction of the dust collecting polar plate, the length of each row of vertical separation strips is 3-5m, and the flushing water redistributor is arranged below the vertical separation strips.
Preferably, the flushing water redistributor of the present invention comprises a water tank arranged in a horizontal direction, the length of the water tank is matched with that of the dust collecting electrode plate, flushing water is blocked by the water tank, and after the vertical speed is reduced to zero, the flushing water flows downwards from the upper end of the water tank into the next liquid film flowing area.
Preferably, the cross section of the water tank adopts an arc-shaped structure, one end of the water tank, which is close to the dust collecting polar plate, is fixedly connected with the dust collecting polar plate, the other end of the water tank is tilted upwards, and the concave surface of the arc-shaped structure faces to the side where the dust collecting polar plate is located.
Preferably, the vertical dividing strips positioned at the upper side and the lower side of the flushing water redistributor are arranged in a staggered manner along the horizontal direction, and the formed liquid film flowing areas are staggered from each other at the two sides of the flushing water redistributor.
Preferably, the flushing water distributor adopts a tubular structure which is arranged along the length direction parallel to the dust collecting polar plate, flushing water outlet holes are uniformly formed at the lower end of the tubular structure, and the flushing water outlet holes correspond to the liquid film flowing areas adjacent below; two ends of the flushing water distributor are provided with water inlets for flushing water to enter.
Preferably, the surface of the wash water redistributor of the present invention is coated with a hydrophilic material.
Preferably, the horizontal spacing of the vertical separator bars of the present invention is 200-400mm.
The invention discloses a dust collecting polar plate liquid film distribution method, which comprises the steps that the dust collecting polar plate of a wet electric dust collector with uniformly distributed liquid films is used, flushing water enters a flushing water distributor, enters a corresponding liquid film flowing area from the flushing water distributor, forms a liquid film on the surface of the dust collecting polar plate, and flows downwards to clean dust on the surface of the dust collecting polar plate; after the wash water flows to the wash water redistributor, the vertical velocity is zeroed and the wash water again flows out from the end of the wash water redistributor.
Preferably, after the flushing water of the present invention flows to the flushing water redistributor, it is blocked by the trough of the arc-shaped structure of the flushing water redistributor and does not continue to flow downwards, and flows into the liquid film flow area below the flushing water redistributor after the water level exceeds the end of the trough which is tilted.
The beneficial effects are that: the wet-type electric dust collector dust collection polar plate with uniformly distributed liquid films and the liquid film distribution method provided by the invention have the following beneficial effects:
1. according to the invention, the vertical separation strips are arranged on the dust collecting polar plates to separate the surfaces of the dust collecting polar plates into the independent liquid film flowing areas, so that water film water flow can be limited to stably flow in the middle of the adjacent separation strips without the staggered confluence phenomenon during flushing, and the flushing effect is improved.
2. According to the invention, the washing water redistributors are arranged on the dust collecting polar plates, and the washing water is slowed down and distributed again through the washing water redistributors, so that the flow rate of the washing water reaching the lower end of the dust collecting polar plates can be reduced, and the tearing of a water film caused by too fast flow rate is avoided, thereby increasing the design height of the dust collecting polar plates, greatly reducing the width of the polar plates and the number of channels, reducing the occupied area, improving the space utilization rate, and being applicable to large smoke amount dust removal and purification occasions such as large thermal power units, large steel-iron sintering machines and the like.
3. The invention utilizes the flushing water redistributor to redistribute the flushing water, so that the flow rate of the flushing water is controllable, thereby reducing the water consumption while ensuring the thickness of the water film, saving the water consumption, reducing the post-treatment capacity of the ash cleaning water and simultaneously reducing the power consumption of the circulating flushing water pump.
4. The two adjacent rows of vertical separation strips are staggered, so that the washing water has enough buffer speed-reducing distance, and meanwhile, the problem of uneven water distribution can be balanced, and the mutual influence of liquid film flowing areas of the upper layer and the lower layer is avoided; the water film formed on the dust collecting polar plate is uniform and complete, the existence of ash removing dead angles is avoided, and the situation of local dust accumulation is avoided, so that the phenomenon of dust discharge by a cathode is avoided, the power supply of the wet electric dust collector is stable, and the dust collecting efficiency is ensured.
5. The flushing water redistributor adopts an arc-shaped structure, so that flushing water is effectively buffered to reduce the flow speed, and the sputtering generated by the flushing water can be avoided.
6. The invention uses the tubular flushing water distributor to supply flushing water, flushing water drips from the flushing water outlet hole to the upper edge of the dust collecting polar plate under the action of gravity, a uniform and stable liquid film can be formed on the surface of the dust collecting polar plate, a plurality of unstable columns of results caused by the splashing of the liquid drops are avoided, and meanwhile, the initial flow velocity of flushing water is reduced, and the water consumption is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a schematic diagram of a dust collecting polar plate structure of the invention;
FIG. 2 is a side view of the dust collector plate of the present invention;
FIG. 3 is a cross-sectional view of the dust collector plate of the present invention taken along line A-A of FIG. 1;
wherein, 1-dust collecting polar plate, 2-washing water distributor, 3-vertical dividing strip, 4-liquid film flowing area, 5-washing water redistributor, 6-water tank, 7-water inlet, 8-washing water outlet hole.
Description of the embodiments
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown, but in which the invention is not so limited.
As shown in fig. 1-3, the invention discloses a dust collecting polar plate of a wet electric dust collector, which comprises a dust collecting polar plate 1 arranged vertically and a flushing water distributor 2 arranged at the upper end of the dust collecting polar plate 1, wherein vertical separation strips 3 are arranged on the dust collecting polar plate 1 side by side, the plate surface of the dust collecting polar plate 1 is separated into a plurality of liquid film flowing areas 4 along the vertical direction through the vertical separation strips 3, and the horizontal distance between the vertical separation strips 3 is 200-400mm; a wash water redistributor 5 for stabilizing the flow rate of the water flow is provided on the dust collecting plate 1 in a horizontal direction below the wash water distributor 2.
The conventional dust collecting polar plate has the advantages that the flow rate of flushing water is accelerated under the action of gravity due to the fact that the flushing water flows downwards from top to bottom, the water film is prevented from tearing, the flushing water amount needs to be increased to ensure the thickness of the water film, so that the water amount needed by the flushing water is large, meanwhile, when the water flows at a high speed, the phenomena of tearing, converging and the like easily occur, the higher the polar plate height is, the higher the water flow speed is, the occurrence probability is high, the part of the area cannot be covered by the water film, the dust removing effect is influenced, and the space utilization rate is low and the height of the dust collecting polar plate is limited generally when the dust collecting polar plate is designed; the cleaning water redistributor 5 is arranged on the dust collecting polar plate 1, so that the flow rate of cleaning water is controllable, the integrity of a water film can be ensured, meanwhile, the dust collecting polar plate with higher height can be arranged under the condition that the material strength of the polar plate is allowed, the occupied area can be reduced under the same dust removing efficiency, the flue gas dust removing and purifying occasion of large-scale equipment can be met, and the water consumption of the cleaning water can be saved.
For the dust collecting polar plate 1 with higher height, a plurality of groups of flushing water redistributors 5 are required to be arranged along the height direction, and in order to facilitate the installation of the vertical separation strips 3 and the flushing water redistributors 5, the vertical separation strips 3 of the invention are provided with a plurality of rows along the height direction of the dust collecting polar plate 1, and the length of each row of the vertical separation strips 3 is 3-5m, so that the too high flow velocity of flushing water in a single liquid film flow area is avoided; the flushing water redistributor 5 is arranged below the vertical separation bars 3 and is used for decelerating and buffering the flushing water in each group of vertical separation bars 3.
Because the flushing water redistributor 5 needs to carry out deceleration buffering on flushing water, in order to reduce impact and avoid liquid splashing to influence the normal operation of a dust collecting device, the flushing water redistributor 5 comprises a water tank 6 which is arranged along the horizontal direction, the length of the water tank 6 is matched with that of a dust collecting polar plate 1, flushing water is blocked by the water tank 6, after the vertical speed is reduced to zero, the flushing water flows downwards from the upper end of the water tank 6 into a next liquid film flowing area 4, the section of the water tank 6 adopts an arc-shaped structure, one end, close to the dust collecting polar plate 1, of the water tank 6 is fixedly connected with the dust collecting polar plate 1, the other end of the water tank 6 is tilted upwards, and the concave surface of the arc-shaped structure faces the side where the dust collecting polar plate 1 is located. When the flushing water flows to the flushing water redistributor 5, the flushing water flows upwards along the concave surface of the arc-shaped structure under the action of inertia, and flows back to the lower part of the arc-shaped structure after the impact force is reduced and the flow speed is reduced, so that the purpose of preventing splashing is realized, the surface of the flushing water redistributor 5 is coated with hydrophilic materials, and the flushing water is ensured to flow stably. The curvature of the arcuate structure may be selected based on the height of the single liquid film flow region 4 to ensure that the arcuate structure is greater than the height of the rinse water free flow impact rise.
In order to enable flushing water to cover the surface of the dust collecting polar plate 1 and prevent four corners or local flow velocity from being too fast, the vertical separation strips 3 positioned on the upper side and the lower side of the flushing water redistributor 5 are arranged in a staggered manner along the horizontal direction, so that when all flushing water enters the next liquid film flowing area after being decelerated, the water distribution condition of the upper liquid film flowing area 4 cannot influence the lower liquid film flowing area 4.
The flushing water distributor 2 adopts a tubular structure which is arranged along the length direction parallel to the dust collecting polar plate 1, flushing water outlet holes 8 are uniformly formed at the lower end of the tubular structure, and the flushing water outlet holes 8 correspond to the liquid film flowing areas 4 adjacent below; the two ends of the flushing water distributor 2 are provided with water inlets 7 for the entry of flushing water.
The invention also discloses a dust collecting polar plate liquid film distribution method, which uses the wet electric dust collector dust collecting polar plate with uniformly distributed liquid films, flushing water enters into the flushing water distributor 2, enters into the corresponding liquid film flowing area 4 from the flushing water distributor 2, forms a liquid film on the surface of the dust collecting polar plate 1, and flows downwards to clean dust on the surface of the dust collecting polar plate 1; after the washing water flows to the washing water redistributor 5, the vertical velocity is zeroed, and flows downward from the outer edge of the end of the washing water redistributor 5 that is tilted.
The dust collecting polar plate structure can break through the problem that a complete and uniform water film cannot be formed on the surface with a large height, and the dust collecting polar plate can be limited by the rigidity of the polar plate at the maximum about 20m according to actual needs, so that the 'short-fat' type of a wet electric dust collector can be changed into the 'thin and high' type, the occupied area is greatly reduced, and the dust collecting polar plate structure can be used in dust removing and purifying occasions with large smoke amount such as large thermal power units, large steel-iron sintering machines and the like. On the other hand, the invention can use less water to keep the complete water film, and greatly reduce the use of flushing water.
The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (10)
1. The wet type electric dust collector dust collection pole plates with uniformly distributed liquid films are characterized by comprising vertically arranged dust collection pole plates (1) and flushing water distributors (2) arranged at the upper ends of the dust collection pole plates (1), wherein vertical separation strips (3) are arranged on the dust collection pole plates (1) side by side, and the plate surfaces of the dust collection pole plates (1) are separated into a plurality of liquid film flowing areas (4) along the vertical direction through the vertical separation strips (3); a flushing water redistributor (5) for stabilizing the flow speed of water flow is arranged below the flushing water distributor (2) on the dust collecting polar plate (1) along the horizontal direction.
2. The dust collecting polar plate of the wet electric dust collector uniformly distributed with the liquid film according to claim 1, wherein the vertical separation strips (3) are arranged in a plurality of rows along the height direction of the dust collecting polar plate (1), the length of each row of vertical separation strips (3) is 3-5m, and the flushing water redistributor (5) is arranged below the vertical separation strips (3).
3. The dust collecting pole plate of the wet electric dust collector with uniformly distributed liquid films according to claim 1, wherein the flushing water redistributor (5) comprises a water tank (6) arranged along the horizontal direction, the length of the water tank (6) is matched with that of the dust collecting pole plate (1), flushing water is blocked by the water tank (6), and after the vertical speed is reduced to zero, the flushing water flows downwards from the upper end of the water tank (6) to the next liquid film flowing area (4).
4. The dust collecting polar plate of the wet electric dust collector with uniformly distributed liquid films according to claim 3, wherein the section of the water tank (6) adopts an arc-shaped structure, one end of the water tank (6) close to the dust collecting polar plate (1) is fixedly connected with the dust collecting polar plate (1), the other end of the water tank is tilted upwards, and the concave surface of the arc-shaped structure faces to one side of the dust collecting polar plate (1).
5. The dust collecting polar plate of the wet electric dust collector with uniformly distributed liquid films according to claim 3, wherein vertical separation strips (3) positioned on the upper side and the lower side of the flushing water redistributor (5) are arranged in a staggered manner along the horizontal direction, and the formed liquid film flowing areas (4) are staggered from each other on the two sides of the flushing water redistributor (5).
6. The dust collecting polar plate of the wet electric precipitator with uniformly distributed liquid films according to claim 1, wherein the flushing water distributor (2) adopts a tubular structure arranged along the length direction parallel to the dust collecting polar plate (1), flushing water outlet holes (8) are uniformly formed at the lower end of the tubular structure, and the flushing water outlet holes (8) correspond to liquid film flowing areas (4) adjacent below; two ends of the flushing water distributor (2) are provided with water inlets (7) for flushing water to enter.
7. The wet electric precipitator dust collecting pole plate with uniformly distributed liquid film according to claim 1, wherein the surface of the flushing water redistributor (5) is coated with hydrophilic material.
8. The wet type electric precipitator dust collecting polar plate with uniformly distributed liquid film according to claim 1, wherein the horizontal spacing of the vertical separation strips (3) is 200-400mm.
9. A dust collecting polar plate liquid film distribution method, which uses a wet electric dust collector with uniformly distributed liquid film according to any one of claims 1-8, and is characterized in that flushing water enters a flushing water distributor (2), enters a corresponding liquid film flowing area (4) from the flushing water distributor (2), forms a liquid film on the surface of the dust collecting polar plate (1), and flows downwards to clean dust on the surface of the dust collecting polar plate (1); after the flushing water flows to the flushing water redistributor (5), the vertical speed is reset, and the flushing water flows out again from the end part of the flushing water redistributor (5).
10. The dust collecting pole plate liquid film distribution method according to claim 9, wherein after the flushing water flows to the flushing water redistributor (5), the flushing water is blocked by a water tank (6) of an arc-shaped structure of the flushing water redistributor (5), and flows into a liquid film flow area (4) below the flushing water redistributor (5) after the water level exceeds the tilted end of the water tank (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310988152.6A CN116713114B (en) | 2023-08-08 | 2023-08-08 | Dust collection polar plate of wet electric precipitator with uniformly distributed liquid film and liquid film distribution method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310988152.6A CN116713114B (en) | 2023-08-08 | 2023-08-08 | Dust collection polar plate of wet electric precipitator with uniformly distributed liquid film and liquid film distribution method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116713114A true CN116713114A (en) | 2023-09-08 |
| CN116713114B CN116713114B (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310988152.6A Active CN116713114B (en) | 2023-08-08 | 2023-08-08 | Dust collection polar plate of wet electric precipitator with uniformly distributed liquid film and liquid film distribution method |
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| CN (1) | CN116713114B (en) |
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| CN116713114B (en) | 2023-10-20 |
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