Wet-type electric dust remover

Abstract

The utility model relates to a wet-type electric dust remover which comprises a box body, a guide air duct is arranged in the box body, the guide air duct is arranged downwards in an inclined mode, a ventilation duct is formed between the tail end of the guide air duct and the box body, and an electrode assembly used for adsorbing dust is arranged in the guide air duct. The guide air channels are internally provided with spraying assemblies used for spraying the electrode assemblies, the multiple guide air channels are arranged at intervals in the vertical direction, the inclination directions of any two adjacent guide air channels are opposite, the ventilation channels of every two adjacent guide air channels are sequentially arranged in a staggered mode, any ventilation channel communicates with the lower guide air channel, and the ventilation channels communicate with the upper guide air channel. An air inlet notch is formed in the top of the box body, and an air outlet notch is formed in the bottom of the box body. The wet-type electric dust remover has the effect of improving the dust removal effect of the wet-type electric dust remover on high-concentration particulate matter flue gas and the working efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of waste gas treatment, and in particular to a wet electrostatic precipitator. Background Art

[0002] In industrial production, dust removal equipment is an important part of waste gas treatment. Electrostatic precipitator is a common type of dust removal equipment, which is divided into wet electrostatic precipitator and dry electrostatic precipitator. The dust removal mechanism of wet electrostatic precipitator and dry electrostatic precipitator is the same. They both adsorb dust through electrostatic effect. The difference is the cleaning method after collecting dust. The wet electrostatic precipitator uses cleaning fluid to flush the electrode to remove the collected dust, while the latter uses hammering and vibration to separate the dust from the electrode. The wet electrostatic precipitator is not limited by resistivity when collecting particulate matter, and has a high removal efficiency for inhalable dust. It can also adsorb gases and remove sulfuric acid trioxide mist and heavy metals in flue gas.

[0003] In the related art, when it is necessary to treat flue gas with high concentration of particulate matter, in order to make the outlet particulate matter concentration meet the standard, the dust collecting pole length is often increased and the dust collecting area is increased to increase the dust removal efficiency.

[0004] When producing wet electrostatic precipitators, if the collecting pole is too long, it will lead to difficulties in processing and transportation. In actual operation, when the collecting pole is too long, the flushing water cannot be sprayed to the lower area of ​​the collecting pole. Even if the water film formed on the upper part reaches the lower part, channel flow will occur, making it impossible to remove the particulate matter accumulated in the lower part, forming a flushing blind area, which seriously affects the operation of the precipitator. Therefore, how to improve the dust removal effect of the wet electrostatic precipitator on high-concentration particulate matter flue gas and improve the working efficiency of the wet electrostatic precipitator is a technical problem that needs to be solved urgently by technicians in this field. Summary of the invention

[0005] In order to improve the dust removal effect and working efficiency of a wet electrostatic precipitator on flue gas with high concentration of particulate matter, the present application provides a wet electrostatic precipitator.

[0006] The wet electrostatic precipitator provided in this application adopts the following technical solution:

[0007] A wet electrostatic precipitator comprises a box body, wherein a guide air duct is arranged in the box body, the guide air duct is arranged obliquely downward, a ventilation duct is formed between the end of the guide air duct and the box body, an electrode assembly for adsorbing dust is arranged in the guide air duct, and a spray assembly for spraying the electrode assembly is also arranged in the guide air duct, a plurality of guide air ducts are arranged at intervals in the vertical direction, the inclination directions of any two adjacent guide air ducts are opposite, the ventilation ducts of two adjacent guide air ducts are arranged in sequence in an alternating manner, any ventilation duct is connected to the lower guide air duct, an air inlet slot is arranged at the top of the box body, and an air outlet slot is arranged at the bottom of the box body.

[0008] By adopting the above technical solution, multiple groups of inclined guide air ducts can shorten the electrode length of the electrode assembly while extending the gas processing time, thereby helping to ensure that the gas discharged from the box meets the processing standards. The inclined guide air ducts and staggered ventilation ducts help to reduce the footprint of the entire wet electrostatic precipitator box. In actual work, the staff introduces polluted gas into the entire box from the air inlet slot. The gas passes through the electrode assembly along the uppermost guide air duct and enters the adjacent guide air duct on the lower side from the ventilation duct. After passing through all the guide air ducts, it is discharged from the box through the air outlet slot. This method helps to improve the dust removal effect and work efficiency of the wet electrostatic precipitator for high-concentration particulate matter flue gas.

[0009] Preferably, any of the guide air ducts includes a top plate and a bottom plate, both of which are inclined along the inclination direction of the guide air duct, the electrode assembly and the spray assembly are fixed on the top plate, and the lower end of the bottom plate extends horizontally to form a stacking plate.

[0010] By adopting the above technical solution, during operation, the spray assembly sprays cleaning liquid to wash the waste accumulated in the electrode assembly, and the cleaning liquid drives the waste to flow downward along the bottom plate arranged downwardly and accumulate in the accumulation plate. The accumulation plate helps to reduce the possibility of waste entering the lower guide air duct.

[0011] Preferably, a baffle is provided on the side of the stacking plate facing away from the bottom plate, and the baffle is vertically arranged.

[0012] By adopting the above technical solution, the baffle helps to further reduce the waste in the first layer of guide air duct from entering the lower layer of guide air duct and polluting the dust-removed gas.

[0013] Preferably, an overflow pool is also provided on the upper side of the top plate, and the overflow pool is located on the upper side of the electrode assembly along the inclination direction of the top plate. A water inlet pipe is fixed on the box body, and the water inlet pipe is connected to the overflow pool. An overflow groove is opened at the bottom of the overflow pool, and the overflow groove passes through the top plate.

[0014] By adopting the above technical solution, water enters the overflow tank through the water inlet pipe, and flows from the overflow tank into the guide air duct under the action of gravity, forming a water curtain. The polluted gas contacts the water curtain, and part of the waste will be taken away by the fast-flowing water. At the same time, the water curtain will humidify the polluted gas. When the wet electrostatic precipitator needs to be cleaned, the cleaning liquid is introduced from the water inlet pipe. The cleaning liquid falls on the bottom plate under the action of gravity and takes away the pollutants settled on the bottom plate.

[0015] Preferably, an abutment plate is also provided on the top plate, and the abutment plate is slidably arranged in the overflow groove, one side surface of the abutment plate in the horizontal direction is pressed against the side wall of the overflow groove, and the other side of the abutment plate in the horizontal direction is provided with a driving component for driving the abutment plate to slide in the horizontal direction.

[0016] By adopting the above technical solution, the staff can drive the abutment plate to slide in the overflow groove in the horizontal direction through the driving assembly, thereby changing the flow rate of the water forming the water curtain.

[0017] Preferably, the electrode assembly comprises anode plates and cathode wires, the anode plates and cathode wires are arranged correspondingly at intervals along the inclination direction of the guide air duct, and a plurality of groups of anode plates and cathode wires are evenly spaced along the width direction of the guide air duct.

[0018] By adopting the above technical solution, high voltage direct current is passed to the anode plate and cathode line to generate a strong electric field, so that the surface of dust or droplet particles in the polluted gas passing through is charged. These charged particles move toward the anode plate under the action of the electric field force and are deposited on the anode plate.

[0019] Preferably, the anode plates and cathode wires are arranged in multiple rows at intervals along the inclination direction of the guide air duct.

[0020] By adopting the above technical solution, increasing the number of anode plates and cathode wires can form multiple strong electric fields, which helps to further improve the dust removal effect of the equipment on high-concentration particulate matter flue gas.

[0021] Preferably, any two adjacent rows of anode plates are staggered along the width direction of the guide air duct.

[0022] By adopting the above technical solution, the staggered anode plates can reduce the possibility of polluted gases missing the anode plates, which helps to further improve the dust removal effect of the equipment on high-concentration particulate matter flue gas.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The inclined multi-layer guide air duct helps to improve the dust removal effect and working efficiency of the wet electrostatic precipitator for high-concentration particulate matter flue gas;

[0025] 2. The bottom plate, accumulation plate and baffle plate help to reduce the waste in one layer of guide air duct from entering the lower layer of guide air duct, and improve the dust removal effect of each layer of guide air duct;

[0026] 3. The overflow trough and abutment plate on the overflow tank facilitate the humidification of polluted gases and the cleaning of waste sediments in the entire wet electrostatic precipitator. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1It is an axonometric schematic diagram of the internal structure of a wet electrostatic precipitator mainly embodied in the embodiment of the present application;

[0028] Figure 2 It is a side view of the guide air duct structure mainly embodied in the embodiment of the present application.

[0029] Figure numerals: 1. Box body; 11. Air inlet slot; 12. Air outlet slot; 13. Exhaust duct; 2. Guide air duct; 21. Top plate; 22. Bottom plate; 23. Stacking plate; 24. Baffle; 25. Ventilation duct; 3. Overflow pool; 31. Overflow trough; 32. Abutment plate; 33. Drive assembly; 34. Water inlet pipe; 4. Electrode assembly; 41. Mounting bracket; 42. Anode plate; 43. Cathode line; 44. Charging device; 5. Spray assembly; 51. Water tank; 52. Water spray pipe; 53. Spray head. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-2 This application is described in further detail.

[0031] The embodiment of the present application discloses a wet electrostatic precipitator.

[0032] See also Figure 1-2 The wet electrostatic precipitator includes a housing 1, a guide air duct 2 is arranged in the housing 1, an electrode assembly 4 and a spray assembly 5 are arranged in the guide air duct 2, an overflow pool 3 is arranged on the upper side of the guide air duct 2, an overflow trough 31 is opened on the overflow pool 3, and the overflow trough 31 connects the guide air duct 2 and the overflow pool 3. When the wet electrostatic precipitator is in working state, the polluted gas to be treated is introduced into the guide air duct 2, and the treatment liquid for treating the polluted gas (non-special polluted gas generally uses water as the treatment liquid) is introduced into the overflow pool 3 and the spray assembly 5. The water in the overflow pool 3 flows out along the overflow trough 31 to form a water curtain under the force of gravity, and the water curtain and the spray assembly 5 humidify the polluted gas. High-voltage direct current is introduced into the electrode assembly 4, and the electrode assembly 4 forms a strong electric field, so that the surface of the dust or droplet particles in the polluted gas passing through is charged. These charged particles are deposited on the electrode assembly 4 under the action of the electric field force. The treatment liquid sprayed by the water curtain and the spray assembly 5 will take away the deposited waste.

[0033] The guide air duct 2 is arranged to be inclined downward along its length direction, and the end of the guide air duct 2 is arranged at intervals with the inner wall of the box body 1 to form a ventilation duct 25. A plurality of guide air ducts 2 are evenly spaced along the vertical direction. The inclination directions of any two adjacent guide air ducts 2 are opposite, and the ventilation duct 25 of any upper guide air duct 2 is connected to the lower guide air duct 2. An air inlet slot 11 is also provided on the box body 1, and the air inlet slot 11 is located on the side of the box body 1 that is away from the ventilation duct 25 along its own length direction of the uppermost guide air duct 2. An air outlet slot 12 is also provided on the lower side of the box body 1, and the air outlet slot 12 is located on the side of the box body 1 that is away from the ventilation duct 25 along its own length direction of the lowermost guide air duct 2, and the air outlet slot 12 is located on the lower side of the lowermost guide air duct 2. An exhaust pipe 13 is connected to the air outlet slot 12. The gas after dust removal is extracted out of the box body 1 through the exhaust pipe 13 to complete the dust removal.

[0034] The guide air duct 2 also includes a top plate 21 and a bottom plate 22, and the inclination direction of the top plate 21 and the bottom plate 22 is the same as the inclination direction of the guide air duct 2. The top plate 21 and the bottom plate 22 are arranged at intervals in the vertical direction. The top plate 21 and the bottom plate 22 are relatively fixed to the box body 1. The bottom plate 22 is also formed with a stacking plate 23 on one side close to the ventilation duct 25 along its length direction, and the stacking plate 23 is arranged horizontally. The stacking plate 23 is also formed with a baffle 24 on one side away from the bottom plate 22 along the length direction of the bottom plate 22, and the baffle 24 is arranged vertically. The water curtain formed by the overflow pool 3 and the water mist sprayed by the spray assembly 5 will wash the electrode assembly 4, and the deposited waste will fall on the bottom plate 22 with the water flow. The horizontally arranged stacking plate 23 and the vertically arranged baffle 24 make the waste deposited in the guide air duct 2 accumulate in the stacking plate 23, which helps to reduce the possibility of waste falling into the lower guide air duct 2 with the water flow, and reduce the secondary pollution of the polluted gas by the raised waste.

[0035] A mounting bracket 41 is also fixed on the top plate 21, and the electrode assembly 4 includes an anode plate 42 and a cathode line 43, and the anode plate 42 and the cathode line 43 are respectively fixedly connected to the mounting bracket 41. A charging device 44 is also provided on the upper side of the top plate 21, and the charging device 44 is electrically connected to the anode plate 42 and the cathode line 43. The charging device 44, the anode plate 42 and the cathode line 43 are all prior art.

[0036] One anode plate 42 and one cathode line 43 are correspondingly arranged as a group, and multiple groups of anode plates 42 and cathode lines 43 are evenly spaced along the width direction of the top plate 21 to form a row of anode plates 42 and cathode lines 43. Multiple rows of anode plates 42 and cathode lines 43 are evenly spaced along the length direction of the top plate 21. Anode plates 42 in any two adjacent rows are staggered. The anode plates 42 and cathode lines 43 arranged in this way will form multiple strong electric fields, which will help improve the dust removal effect on high-concentration particulate matter flue gas. Multiple staggered anode plates 42 help reduce the possibility of polluted gas missing the anode plates 42.

[0037] The spray assembly 5 includes a water tank 51 and a water spray pipe 52. The water tank 51 is fixed on the upper side of the top plate 21. The water spray pipe 52 is relatively fixed on the lower side of the top plate 21. Both ends of the water spray pipe 52 are connected to the water tank 51. A nozzle 53 is connected to the water spray pipe 52, and a plurality of nozzles 53 are evenly spaced along the width direction of the top plate 21. One water spray pipe 52 is provided on both sides of any anode plate 42 along its own thickness direction. Any two adjacent anode plates 42 can share one nozzle 53. The water spray pipes 52 and nozzles 53 on both sides of the anode plate 42 facilitate cleaning of waste deposited on the surface of the anode plate 42.

[0038] The box body 1 is also connected with a water inlet pipe 34, one end of which is connected to the overflow tank 3. The overflow tank 3 is located on the upper side of the electrode assembly 4 along the length direction of the guide air duct 2. An abutment plate 32 is also provided in the overflow trough 31, and the abutment plate 32 is horizontally arranged. The abutment plate 32 abuts against a side wall of the overflow trough 31 along one side of the length direction of the box body 1, and the abutment plate 32 slides and cooperates in the overflow trough 31 along the length direction of the box body 1. A driving assembly 33 is provided on the other side of the abutment plate 32, and the driving assembly 33 drives the abutment plate 32 to slide, and the driving assembly 33 is generally a telescopic motor. The staff can change the gap between the abutment plate 32 and the overflow trough 31 by operating the driving assembly 33, thereby controlling the formation of the water curtain and the amount of water in the water curtain.

[0039] The implementation principle of a wet electrostatic precipitator in an embodiment of the present application is as follows: the staff energizes the electrode assembly 4 through the charging device 44, and multiple strong electric fields are formed between the multiple groups of anode plates 42 and cathode lines 43. Water is passed into the overflow pool 3 through the water inlet pipe 34, and the water flows along the gap between the abutment plate 32 and the overflow groove 31 under the force of gravity to fall left and right to form a water curtain. Turn on the spray device, and the nozzle 53 sprays water mist. The staff introduces polluted gas into the box body 1 through the entrance slot. The polluted gas is humidified by the water curtain and the spray device, and passes through the electrode assembly 4. The dust or droplet particles in the polluted gas are charged and deposited on the surface of the anode plate 42 under the action of the electric field force. The polluted gas passes through the multi-layer guide air duct 2 and is extracted out of the box body 1 through the exhaust pipe 13 to complete the dust removal work.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A wet electrostatic precipitator, characterized in that: The invention comprises a box body (1), wherein a guide air duct (2) is arranged in the box body (1), wherein the guide air duct (2) is arranged obliquely downward, and a ventilation duct (25) is formed between the end of the guide air duct (2) and the box body (1), wherein an electrode assembly (4) for adsorbing dust is arranged in the guide air duct (2), and wherein a spray assembly (5) for spraying the electrode assembly (4) is also arranged in the guide air duct (2), wherein a plurality of guide air ducts (2) are arranged at intervals in a vertical direction, wherein the inclination directions of any two adjacent guide air ducts (2) are opposite, and wherein the ventilation ducts (25) of two adjacent guide air ducts (2) are arranged in sequence in an alternating manner, and wherein any ventilation duct (25) is connected to the lower guide air duct (2), wherein an air inlet slot (11) is arranged at the top of the box body (1), and an air outlet slot (12) is arranged at the bottom of the box body (1).

2. A wet electrostatic precipitator according to claim 1, characterized in that: Any of the guide air ducts (2) comprises a top plate (21) and a bottom plate (22), wherein the top plate (21) and the bottom plate (22) are both arranged obliquely along the inclination direction of the guide air duct (2), the electrode assembly (4) and the spray assembly (5) are both fixed on the top plate (21), and the lower end of the bottom plate (22) extends in a horizontal direction to form a stacking plate (23).

3. A wet electrostatic precipitator according to claim 2, characterized in that: A baffle plate (24) is provided on the side of the stacking plate (23) facing away from the bottom plate (22), and the baffle plate (24) is arranged vertically.

4. A wet electrostatic precipitator according to claim 3, characterized in that: An overflow pool (3) is also provided on the upper side of the top plate (21), and the overflow pool (3) is located on the upper side of the electrode assembly (4) along the inclination direction of the top plate (21). A water inlet pipe (34) is fixed on the box body (1), and the water inlet pipe (34) is connected to the overflow pool (3). An overflow groove (31) is provided at the bottom end of the overflow pool (3), and the overflow groove (31) passes through the top plate (21) and is connected to the guide air duct (2).

5. A wet electrostatic precipitator according to claim 4, characterized in that: The top plate (21) is also provided with an abutment plate (32), the abutment plate (32) being slidably arranged in the overflow groove (31), one side surface of the abutment plate (32) in the horizontal direction being pressed against the side wall of the overflow groove (31), and the other side of the abutment plate (32) in the horizontal direction being provided with a driving component (33) for driving the abutment plate (32) to slide in the horizontal direction.

6. A wet electrostatic precipitator according to claim 1, characterized in that: The electrode assembly (4) comprises an anode plate (42) and a cathode line (43), wherein the anode plate (42) and the cathode line (43) are arranged in a corresponding manner at intervals along the inclination direction of the guide air duct (2), and a plurality of groups of the anode plate (42) and the cathode line (43) are evenly spaced in the width direction of the guide air duct (2).

7. A wet electrostatic precipitator according to claim 6, characterized in that: The anode plates (42) and cathode wires (43) are arranged in multiple rows at intervals along the inclined direction of the guide air duct (2).

8. A wet electrostatic precipitator according to claim 7, characterized in that: Any two adjacent rows of anode plates (42) are staggered along the width direction of the guide air duct (2).

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