White fog eliminating electrostatic demister for waste gas treatment

Abstract

The utility model discloses an electrostatic demister for eliminating white fog for waste gas treatment, which comprises a reaction tower, a reaction cavity is arranged in the reaction tower, the lower part and the upper part of the reaction tower are respectively provided with a gas inlet and an outlet which are connected with the reaction cavity, and a filler area and an electrostatic demisting area which are positioned between the gas inlet and the outlet are arranged in the reaction cavity. A gas-liquid separation plate is arranged at the joint of the filler area and the electrostatic demisting area, a plurality of flow guide holes used for communicating the filler area with the electrostatic demisting area are formed in the gas-liquid separation plate, and a gas-liquid separator used for gas-liquid diversion is arranged above the flow guide holes. The utility model discloses an electrostatic demister for eliminating rime fog for waste gas treatment, which can be used for carrying out mass transfer process on a gas-liquid interface, tempering waste gas components, efficiently removing pollutant components in high-concentration waste gas, reducing aerial fog components in the waste gas, meeting the requirement of low emission and reducing the rime fog phenomenon at an exhaust port. The method can be used for modular production and manufacturing.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection and purification technology, and in particular to an electrostatic precipitator for eliminating white fog in waste gas treatment. Background Technology

[0002] In the pharmaceutical manufacturing industry, the waste gas generated by chemical reactions is characterized by simple pollutant composition, high concentration, and low air volume. Some of the waste gas is suitable for treatment by wet packed towers. However, due to the requirements of pollutant regulations, the discharge concentration requirements are low, and it is difficult for a single wet packed tower to guarantee that the discharge data meets the emission requirements. At the same time, due to the entrainment of gas mist, the surrounding steel components are severely corroded. Summary of the Invention

[0003] This invention overcomes the shortcomings of the prior art and provides an electrostatic precipitator for eliminating white fog in waste gas treatment. It can perform a mass transfer process at the gas-liquid interface to condition the components of the waste gas, efficiently remove pollutants from high-concentration waste gas, and reduce the aerosol components in the waste gas to meet the requirements of low emissions and reduce the generation of white fog at the exhaust port. It can be used for modular production.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an electrostatic precipitator for eliminating white fog in waste gas treatment, comprising a reaction tower, a reaction chamber provided inside the reaction tower, an air inlet and an outlet connected to the reaction chamber respectively provided at the lower and upper parts of the reaction tower, a packing zone and an electrostatic precipitator provided inside the reaction chamber between the air inlet and the outlet, and a gas-liquid isolation plate provided at the junction of the packing zone and the electrostatic precipitator, a plurality of guide holes for connecting the packing zone and the electrostatic precipitator provided on the gas-liquid isolation plate, and a gas-liquid separator for gas-liquid separation provided above the guide holes.

[0005] In a preferred embodiment of the present invention, a circulating water tank is provided at the bottom of the reaction tower, and an air inlet is provided above the circulating water tank between the packing area and the circulating water tank. The packing area includes a packing layer embedded in the reaction chamber and a spray layer located above the packing layer. A spray head of the spray layer is connected to the circulating water tank through a spray pipe and a circulating water pump. The spraying direction of the spray head is towards the packing layer.

[0006] In a preferred embodiment of this utility model, the gas-liquid isolation plate is a partition plate embedded in the reaction chamber, and the partition plate has a plurality of guide holes arranged longitudinally.

[0007] The gas-liquid separator includes a guide pipe, one end of which is connected to a guide hole, and a cover is provided on the other end of the guide pipe. Several side-opening guide grooves are reserved between the cover and the guide pipe. The cover is placed on the guide pipe.

[0008] In a preferred embodiment of this utility model, a liquid collection area is formed between the outside of the guide pipe, the gas-liquid isolation plate, and the inner wall of the reaction chamber. The liquid collection area is connected to the primary flushing spray layer via a spray pipe and a circulating water pump. The primary flushing spray layer is embedded in the reaction chamber and is located between the gas-liquid separator and the electrostatic demisting zone.

[0009] In a preferred embodiment of the present invention, the electrostatic demisting zone includes a plurality of dust collection pipes disposed within the reaction chamber; and an electrode suspension disposed within the reaction chamber, wherein a plurality of discharge electrodes inserted into the dust collection pipes are suspended on the electrode suspension, and the discharge electrodes are connected to an electrostatic demisting mechanism disposed outside the reaction tower.

[0010] In a preferred embodiment of the present invention, the dust collection tube includes a plurality of dust collection plates embedded in the reaction chamber, the dust collection plates being staggered and spliced ​​to form a plurality of square tubes, and the discharge electrode being inserted into the dust collection tube.

[0011] In a preferred embodiment of this utility model, a secondary flushing spray layer is further provided in the reaction chamber between the electrostatic demisting zone and the outlet. The secondary flushing spray layer is connected to the circulating water tank or external clean water pipeline through the spray management and sewage discharge electric valve 0.

[0012] In a preferred embodiment of this utility model, the spray nozzles of the secondary rinsing spray layer spray downwards toward the discharge electrode and the dust collection pipe, while the spray nozzles of the primary rinsing spray layer spray upwards toward the discharge electrode and the dust collection pipe.

[0013] In a preferred embodiment of this utility model, the dust collection pipe is in the form of, but is not limited to, a square pipe and a hexagonal pipe, and the dust collection plate is conductive and made of CFRP or steel.

[0014] And / or, the materials of the electrode suspension 8 and the discharge electrode 9 are selected from different metal materials according to the composition of the exhaust gas, including one of SUS304 stainless steel, SUS316 stainless steel, titanium, and 904L stainless steel.

[0015] In a preferred embodiment of this utility model, the air outlet of the blower is introduced into the insulation box through a heater and a hot air pipe, and a filter screen is installed at the inlet of the blower to prevent debris from entering the blower.

[0016] And / or, the exhaust outlet is located at the top of the equipment;

[0017] And / or, the drain valve is installed on the circulating water pipe at the outlet of the second circulating water pump to control the discharge of circulating water from the static electricity area, and the discharged circulating water enters the circulating water tank.

[0018] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0019] This utility model discloses an electrostatic precipitator for eliminating white fog in waste gas treatment, which meets the requirements of low emission of high-concentration waste gas; it can ensure the emission of exhaust gas; the equipment is integrated and occupies a small area, and is suitable for low air volume and high concentration environments; it can be used for modular production.

[0020] 1. When the exhaust gas passes through the packing zone, it comes into full contact with the wetted surface of the packing material, and a mass transfer process occurs at the gas-liquid interface. High-concentration pollutants are removed efficiently, and the composition of the exhaust gas is conditioned at the same time.

[0021] 2. When the exhaust gas passes through the electrostatic zone again, a large number of water droplets, pollutant components and aerosol components mixed in the exhaust gas are charged by the discharge electrode. Driven by the electrostatic field force, they are enriched on the dust collection plate, and then enter the circulating water tank under the impact of gravity or water flow.

[0022] 3. It efficiently removes pollutants from high-concentration exhaust gases, while reducing aerosol components in the exhaust gases to meet low emission requirements and reduce white fog at the exhaust outlet; the integrated manufacturing process of the equipment occupies a small area. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the structure of an electrostatic precipitator for eliminating white fog in waste gas treatment according to a preferred embodiment of the present invention. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the structure of an electrostatic precipitator for eliminating white fog in waste gas treatment according to a preferred embodiment of the present invention. Figure 2 ;

[0026] The components are as follows: 1. Circulating water tank; 2. Air inlet; 3. Packing area; 4. Spray layer; 5. Gas-liquid isolation plate; 6. Gas-liquid separator; 7. Primary flushing spray layer; 8. Electrostatic demisting area; 9. Insulation box; 10. Hot air duct; 11. Secondary flushing spray layer; 12. Outlet; 13. Purge fan; 14. Circulating water pump one; 15. Circulating water pump two; 16. Electrical control panel; 17. Heater; 18. Electrode suspension; 19. Discharge electrode; 20. Sewage discharge electric valve; 21. Reaction tower; 22. Feed valve; 23. Drain valve; 24. Liquid level switch; 25. pH meter. Detailed Implementation

[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention / utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention / utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention / utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention / utility model based on the specific circumstances. Example 1

[0029] like Figure 1 As shown, an electrostatic precipitator for eliminating white fog in waste gas treatment includes a reaction tower 21, a reaction chamber inside the reaction tower 21, an air inlet 2 and an outlet 12 connected to the reaction chamber at the lower and upper parts of the reaction tower 21, respectively, a packing zone 3 and an electrostatic precipitator 8 located between the air inlet 2 and the outlet 12 in the reaction chamber, and a gas-liquid isolation plate 5 is provided at the junction of the packing zone 3 and the electrostatic precipitator 8, the gas-liquid isolation plate 5 is provided with a plurality of guide holes for connecting the packing zone 3 and the electrostatic precipitator 8, and a gas-liquid separator 6 for gas-liquid separation is provided above the guide holes.

[0030] Specifically, a circulating water tank 1 connected to the reaction chamber is provided at the bottom of the reaction tower 21. An air inlet 2 is provided above the circulating water tank 1 between the packing area 3 and the circulating water tank 1. The packing area 3 includes a packing layer embedded in the reaction chamber and a spray layer 4 located above the packing layer. The spray head 1 of the spray layer 4 is connected to the circulating water tank 1 through a spray pipe 1 and a circulating water pump 14. The spray direction of the spray head 1 is towards the packing layer.

[0031] Specifically, the gas-liquid isolation plate 5 is a partition embedded in the reaction chamber, with several guide holes arranged longitudinally on the partition; the gas-liquid separator 6 includes a guide pipe, one end of which is connected to the guide holes, and the other end of which is provided with a cover. Several side-opening guide grooves are reserved between the cover and the guide pipe; and the cover is placed on the guide pipe. The projected area of ​​the cover covers the projected area of ​​the guide pipe. Furthermore, a liquid collection area is formed between the outside of the guide pipe, the gas-liquid isolation plate 5, and the inner wall of the reaction chamber. The liquid collection area is connected to the primary flushing spray layer 7 via a spray pipe and the circulating water pump 15; the primary flushing spray layer 7 is embedded in the reaction chamber and is located between the gas-liquid separator 6 and the electrostatic demister zone 8.

[0032] Specifically, the electrostatic demister zone 8 includes several dust collection pipes installed within the reaction chamber; and an electrode suspension 18 installed within the reaction chamber, on which several discharge electrodes 19 inserted into the dust collection pipes are suspended. The discharge electrodes 19 are connected to an electrostatic demister mechanism installed outside the reaction tower 21. Further, the electrostatic demister mechanism includes an insulating box 9 and an electrical control panel 16. The electrical control panel 16 is electrically connected to the insulating box 9, and the insulating box 9 is electrically connected to the discharge electrodes 19. The dust collection pipes include several dust collection plates embedded within the reaction chamber, with the dust collection plates interlaced to form several square tube-shaped dust collection pipes. The discharge electrodes 19 are inserted into the dust collection pipes.

[0033] Specifically, a secondary rinsing spray layer 11 is also provided inside the reaction chamber, located between the electrostatic demister zone 8 and the outlet 12. The secondary rinsing spray layer 11 is connected to the circulating water tank 1 or an external clean water pipeline via a spray management system and a drain electric valve 20. Furthermore, the spray heads of the secondary rinsing spray layer 11 spray downwards towards the discharge electrode 19 and the dust collection pipe, while the spray heads of the primary rinsing spray layer 7 spray upwards towards the discharge electrode 19 and the dust collection pipe. Example 2

[0034] like Figure 1 As shown, an electrostatic precipitator for eliminating white fog in waste gas treatment includes a reaction tower 21, a reaction chamber inside the reaction tower 21, an air inlet 2 and an outlet 12 connected to the reaction chamber at the lower and upper parts of the reaction tower 21, respectively, a packing zone 3 and an electrostatic precipitator 8 located between the air inlet 2 and the outlet 12 in the reaction chamber, and a gas-liquid isolation plate 5 is provided at the junction of the packing zone 3 and the electrostatic precipitator 8, the gas-liquid isolation plate 5 is provided with a plurality of guide holes for connecting the packing zone 3 and the electrostatic precipitator 8, and a gas-liquid separator 6 for gas-liquid separation is provided above the guide holes.

[0035] Specifically, a circulating water tank 1 connected to the reaction chamber is provided at the bottom of the reaction tower 21. An air inlet 2 is provided above the circulating water tank 1 between the packing area 3 and the circulating water tank 1. The packing area 3 includes a packing layer embedded in the reaction chamber and a spray layer 4 located above the packing layer. The spray head 1 of the spray layer 4 is connected to the circulating water tank 1 through a spray pipe 1 and a circulating water pump 14. The spray direction of the spray head 1 is towards the packing layer.

[0036] Specifically, the gas-liquid isolation plate 5 is a partition embedded in the reaction chamber, with several guide holes arranged longitudinally on the partition; the gas-liquid separator 6 includes a guide pipe, one end of which is connected to the guide holes, and the other end of which is provided with a cover. Several side-opening guide grooves are reserved between the cover and the guide pipe; and the cover is placed on the guide pipe. The projected area of ​​the cover covers the projected area of ​​the guide pipe. Furthermore, a liquid collection area is formed between the outside of the guide pipe, the gas-liquid isolation plate 5, and the inner wall of the reaction chamber. The liquid collection area is connected to the primary flushing spray layer 7 via a spray pipe and the circulating water pump 15; the primary flushing spray layer 7 is embedded in the reaction chamber and is located between the gas-liquid separator 6 and the electrostatic demister zone 8.

[0037] Specifically, the electrostatic demister zone 8 includes several dust collection pipes installed within the reaction chamber; and an electrode suspension 18 installed within the reaction chamber, on which several discharge electrodes 19 inserted into the dust collection pipes are suspended. The discharge electrodes 19 are connected to an electrostatic demister mechanism installed outside the reaction tower 21. Further, the electrostatic demister mechanism includes an insulating box 9 and an electrical control panel 16. The electrical control panel 16 is electrically connected to the insulating box 9, and the insulating box 9 is electrically connected to the discharge electrodes 19. The dust collection pipes include several dust collection plates embedded within the reaction chamber, with the dust collection plates interlaced to form several square tube-shaped dust collection pipes. The discharge electrodes 19 are inserted into the dust collection pipes.

[0038] Specifically, a secondary rinsing spray layer 11 is also provided inside the reaction chamber, located between the electrostatic demister zone 8 and the outlet 12. The secondary rinsing spray layer 11 is connected to the circulating water tank 1 or an external clean water pipeline via a spray management system and a drain electric valve 20. Furthermore, the spray heads of the secondary rinsing spray layer 11 spray downwards towards the discharge electrode 19 and the dust collection pipe, while the spray heads of the primary rinsing spray layer 7 spray upwards towards the discharge electrode 19 and the dust collection pipe.

[0039] Specifically, the secondary flushing spray layer 11 is arranged above the electrostatic demister zone 8. Circulating water is sprayed downwards through the nozzles of the secondary flushing spray layer 11 to flush the dust collection plate of the electrostatic demister zone 8. The blower 13 draws in outside air, heats it through the heater 17, and then the hot air enters the insulation box 9 through the hot air pipe 10 to keep the insulation box 9 dry. A filter screen is installed at the inlet of the blower 13 to prevent debris from entering the blower 13. Example 3

[0040] When processing an air volume of 3000 CMH, the exhaust gas originates from hydrochloric acid mist from the pharmaceutical industry. The imported hydrochloric acid concentration is 10000 mg / m³. The electrostatic precipitator used for eliminating white mist in the exhaust gas treatment, namely reaction tower 1, has dimensions of L2*W*H7m, and the bottom water tank has dimensions of L3*W2*H1m. The main body of the outer shell is made of FRP material. Figure 1 As shown, an electrostatic precipitator for eliminating white fog in waste gas treatment includes a reaction tower 21, a reaction chamber inside the reaction tower 21, an air inlet 2 and an outlet 12 connected to the reaction chamber at the lower and upper parts of the reaction tower 21, respectively, a packing zone 3 and an electrostatic precipitator 8 located between the air inlet 2 and the outlet 12 in the reaction chamber, and a gas-liquid isolation plate 5 is provided at the junction of the packing zone 3 and the electrostatic precipitator 8, the gas-liquid isolation plate 5 is provided with a plurality of guide holes for connecting the packing zone 3 and the electrostatic precipitator 8, and a gas-liquid separator 6 for gas-liquid separation is provided above the guide holes.

[0041] Specifically, a circulating water tank 1 connected to the reaction chamber is located at the bottom of the reaction tower 21. An air inlet 2 is positioned above the circulating water tank 1, between the packing zone 3 and the circulating water tank 1. The packing zone 3 includes a packing layer embedded in the reaction chamber and a spray layer 4 above the packing layer. The spray head 1 of the spray layer 4 is connected to the circulating water tank 1 via a spray pipe 1 and a circulating water pump 14, with the spray direction of the spray head 1 facing the packing layer. Furthermore, the circulating water tank 1 is located at the bottom of the equipment and is equipped with inlet / outlet valves, a dosing valve, a level gauge, a pH meter, and a conductivity meter. The circulating water pump 14 is installed on the circulating water tank 1 using an internal installation method. 30% NaOH is used for dosing, and the pH meter controls the start and stop of the dosing valve. The pH meter's control range is 8-10. The packing zone 3 is installed above the air inlet 2. It is formed by structured packing with a height of 400mm. The circulating water pump 14 transports the circulating water in the circulating water tank 1 to the spray layer 4 through the circulating water pipe, and sprays it downward through the nozzles of the spray layer 4 to wet the packing in the packing zone 3.

[0042] Specifically, the gas-liquid isolation plate 5 is a partition embedded in the reaction chamber, with several guide holes arranged longitudinally on the partition; the gas-liquid separator 6 includes a guide pipe, one end of which is connected to the guide holes, and the other end of which is provided with a cover. Several side-opening guide grooves are reserved between the cover and the guide pipe; and the cover is placed on the guide pipe. The projected area of ​​the cover covers the projected area of ​​the guide pipe. Furthermore, a liquid collection area is formed between the outside of the guide pipe, the gas-liquid isolation plate 5, and the inner wall of the reaction chamber. The liquid collection area is connected to the primary flushing spray layer 7 via a spray pipe and the circulating water pump 15; the primary flushing spray layer 7 is embedded in the reaction chamber and is located between the gas-liquid separator 6 and the electrostatic demister zone 8. The packing zone 3 and the electrostatic zone 8 are separated from the gas-liquid separator 6 by the gas-liquid isolation plate 5. Simultaneously, the gas-liquid isolation plate 5 and the guide pipe at the bottom of the gas-liquid separator 6 form the inner circulating water tank of the electrostatic zone, equipped with an inlet valve, a dosing valve, a level gauge, a pH meter, and a conductivity meter. Circulating water pump 2 15 is installed on this inner circulating water tank using an external mounting method. More specifically, the inner circulating water tank uses 30% NaOH as a dosing agent, with the dosing valve controlled by a pH meter, the pH setting range being 8-10. The primary flushing spray layer 7 is located above the inner circulating water tank of the electrostatic zone 8, formed by the guide pipe at the bottom of the gas-liquid isolation plate 5 and the gas-liquid separator 6. Circulating water is sprayed upwards through the nozzles of the spray heads in the primary flushing spray layer 7 to flush the dust collection plate of the electrostatic demisting zone 8.

[0043] Specifically, the electrostatic demister zone 8 includes several dust collection pipes installed within the reaction chamber; and an electrode suspension 18 installed within the reaction chamber, on which several discharge electrodes 19 inserted into the dust collection pipes are suspended. The discharge electrodes 19 are connected to the electrostatic demister mechanism installed outside the reaction tower 21. Further, the electrostatic demister mechanism includes an insulating box 9 and an electrical control panel 16. The electrical control panel 16 is electrically connected to the insulating box 9, and the insulating box 9 is electrically connected to the discharge electrodes 19. Further, insulators and the electrode suspension 18 are placed in the insulating box 9. High voltage converted by the high-voltage frequency converter in the electrical control panel 16 is transmitted to the electrode suspension 18 and the discharge electrodes 19 via a circuit, and discharge occurs through the discharge electrodes 19, forming an electrostatic field in the multiple dust collection pipes of the electrostatic demister zone 8 to remove pollutants. The electrode suspension 18 is made of 904L stainless steel; the discharge electrodes 19 are made of titanium.

[0044] Specifically, the dust collection tube includes several dust collection plates embedded in the reaction chamber. The dust collection plates are staggered and spliced ​​to form several square tubes. The discharge electrode 19 is inserted into the dust collection tube. The electrostatic demister zone 8 consists of multiple dust collection tubes, which are spliced ​​from multiple dust collection plates. The dust collection tubes are square tubes, and the dust collection plates are made of conductive material. The conductive material can be CFRP fiberglass containing carbon powder.

[0045] Specifically, a secondary rinsing spray layer 11 is also installed inside the reaction chamber, located between the electrostatic demister zone 8 and the outlet 12. The secondary rinsing spray layer 11 is connected to the circulating water tank 1 or an external clean water pipeline via a spray management system and a drain electric valve 20. Furthermore, the spray nozzles of the secondary rinsing spray layer 11 spray downwards towards the discharge electrode 19 and the dust collection pipe, while the spray nozzles of the primary rinsing spray layer 7 spray upwards towards the discharge electrode 19 and the dust collection pipe. The secondary rinsing spray layer 11 is positioned above the electrostatic demister zone 8, and circulating water is sprayed downwards through the nozzles of the secondary rinsing spray layer 11 to rinse the dust collection plate of the electrostatic demister zone 8. The blower 13 draws in outside air, heats it through the heater 17, and then the hot air enters the insulation box 9 through the hot air pipe 10 to keep the insulation box 9 dry. A filter screen is installed at the inlet of the blower 13 to prevent debris from entering the blower 13.

[0046] Specifically, exhaust outlet 12 is located at the top of the equipment. A drain valve 20 is installed on the circulating water pipe at the outlet of the circulating water pump 15 to control the discharge of circulating water from the electrostatic area; the discharged circulating water enters the circulating water tank 1. The outlet detection data shows an average hourly hydrochloric acid concentration of 8.6 mg / m³. 3 . Example 4

[0047] Based on Example 3, such as Figure 2 As shown, a feed valve 22 and a drain valve 23, communicating with the reaction chamber, are connected to the bottom of the reaction tower 21. The feed valve 22 is positioned at a higher height on the reaction tower 21 than the drain valve 23. The reaction chamber at the bottom of the reaction tower 21 is used to collect the reaction liquid. The reaction chamber at the bottom of the reaction tower 21 is connected to the circulating water tank 1, which is also connected to the feed valve 22 and a level switch 24. The circulating water tank 1 is fed through the feed valve 22, and the level is detected by the level switch 24. The level switch 24 is a level alarm switch, which is sufficient for monitoring the level. Furthermore, a pH meter 25 is installed on a branch pipe leading from the output pipe or guide pipe of the circulating water pump 2 15, which forms a collection area between the outside of the pump and the gas-liquid isolation plate 5 and the inner wall of the reaction chamber. This branch pipe is used to detect the pH parameter in the pipe. The pH meter 25 is a pH meter, which is a standard technology. The specific model selection will not be detailed here, as long as it can detect the pH value.

[0048] The working principle is:

[0049] This utility model discloses an electrostatic precipitator for eliminating white fog in waste gas treatment, achieving the requirement of low emissions for high-concentration waste gas; ensuring emissions from the exhaust port; featuring integrated manufacturing with a small footprint; suitable for low-volume, high-concentration environments; and suitable for modular production. When the waste gas passes through the packing zone, it comes into full contact with the wetted surface of the packing material, undergoing a mass transfer process at the gas-liquid interface, efficiently removing high-concentration pollutants while simultaneously conditioning the waste gas composition. When the waste gas passes through the electrostatic zone again, a large number of water droplets, pollutant components, and aerosol components are charged by the discharge electrode. Driven by the electrostatic field, they are concentrated on the dust collection plate and then enter the circulating water tank under the impact of gravity or water flow. This method efficiently removes pollutants from high-concentration waste gas while reducing aerosol components, meeting low emission requirements and reducing white fog formation at the exhaust port; the integrated manufacturing process also minimizes the footprint.

[0050] Based on the preferred embodiments of this utility model, and through the above description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the claims.

Claims

1. An electrostatic precipitator for eliminating white fog in waste gas treatment, characterized in that: The system includes a reaction tower (21), which has a reaction chamber. The lower and upper parts of the reaction tower (21) are respectively provided with an air inlet (2) and an outlet (12) connected to the reaction chamber. The reaction chamber is provided with a packing zone (3) and an electrostatic demister zone (8) located between the air inlet (2) and the outlet (12). A gas-liquid isolation plate (5) is provided at the junction of the packing zone (3) and the electrostatic demister zone (8). The gas-liquid isolation plate (5) is provided with a number of guide holes for connecting the packing zone (3) and the electrostatic demister zone (8). A gas-liquid separator (6) for gas-liquid separation is provided above the guide holes.

2. The electrostatic precipitator for eliminating white fog in waste gas treatment according to claim 1, characterized in that: The bottom of the reaction tower (21) is provided with a circulating water tank (1), and the air inlet (2) is located between the packing area (3) and the circulating water tank (1). The packing area (3) includes a packing layer embedded in the reaction chamber and a spray layer (4) located above the packing layer. The spray head of the spray layer (4) is connected to the circulating water tank (1) through a spray pipe and a circulating water pump (14). The spray direction of the spray head is towards the packing layer.

3. An electrostatic precipitator for eliminating white fog in waste gas treatment according to claim 2, characterized in that: The gas-liquid isolation plate (5) is a partition plate embedded in the reaction chamber, and the partition plate is provided with a plurality of flow guide holes in the longitudinal direction; The gas-liquid separator (6) includes a guide pipe, one end of which is connected to the guide hole, and a cover is provided on the other end of the guide pipe. Several side-opening guide grooves are reserved between the cover and the guide pipe. The cover is placed on the guide pipe.

4. An electrostatic precipitator for eliminating white fog in waste gas treatment according to claim 3, characterized in that: The outer side of the guide pipe forms a liquid collection area between the gas-liquid isolation plate (5) and the inner wall of the reaction chamber. The liquid collection area is connected to the primary flushing spray layer (7) through the spray pipe and the second circulating water pump (15). The primary flushing spray layer (7) is embedded in the reaction chamber and is located between the gas-liquid separator (6) and the electrostatic demisting area (8).

5. An electrostatic precipitator for eliminating white fog in waste gas treatment according to claim 4, characterized in that: The electrostatic demisting zone (8) includes several dust collection pipes installed in the reaction chamber; and an electrode suspension (18) installed in the reaction chamber. Several discharge electrodes (19) inserted into the dust collection pipes are suspended on the electrode suspension (18). The discharge electrodes (19) are connected to the electrostatic demisting mechanism installed outside the reaction tower (21).

6. An electrostatic precipitator for eliminating white fog in waste gas treatment according to claim 5, characterized in that: The dust collection tube includes several dust collection plates embedded in the reaction chamber. The dust collection plates are staggered and spliced ​​to form several square tubes. The discharge electrode (19) is inserted into the dust collection tube.

7. An electrostatic precipitator for eliminating white fog in waste gas treatment according to claim 6, characterized in that: The reaction chamber is also provided with a secondary flushing spray layer (11) located between the electrostatic demisting zone (8) and the outlet (12). The secondary flushing spray layer (11) is connected to the circulating water tank (1) or an external clean water pipeline through the spray management and sewage discharge electric valve (20).

8. An electrostatic precipitator for eliminating white fog in waste gas treatment according to claim 7, characterized in that: The spray nozzles of the secondary flushing spray layer (11) spray downwards toward the discharge electrode (19) and the dust collection pipe, while the spray nozzles of the primary flushing spray layer (7) spray upwards toward the discharge electrode (19) and the dust collection pipe.

9. An electrostatic precipitator for eliminating white fog in waste gas treatment according to claim 8, characterized in that: The dust collection pipes are in the form of, but are not limited to, square pipes and hexagonal pipes. The dust collection plates are conductive and made of CFRP or steel. And / or, the materials of the electrode suspension (18) and the discharge electrode (19) are selected from different metal materials according to the composition of the exhaust gas, including one of SUS304 stainless steel, SUS316 stainless steel, titanium, and 904L stainless steel.

10. An electrostatic precipitator for eliminating white fog in waste gas treatment according to claim 9, characterized in that: The air outlet of the blower (13) is introduced into the insulation box (9) through the heater (17) and the hot air pipe (10), and a filter screen is installed at the inlet of the blower (13) to prevent debris from entering the blower (13). And / or, the exhaust outlet (12) is located on top of the equipment; And / or, the drain electric valve (20) is installed on the circulating water pipe at the outlet of the second circulating water pump (15) to control the discharge of circulating water in the static area, and the discharged circulating water enters the circulating water tank (1).

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