A wet electrostatic fume precipitator

Abstract

The application relates to the technical field of electrostatic oil fume removal equipment, and discloses a wet electrostatic oil fume removal equipment which comprises a shell, a spraying assembly, an electrostatic adsorption assembly and a pollution discharge assembly are arranged in the shell from top to bottom, an air inlet pipe is arranged on the outer wall of the shell between the electrostatic adsorption assembly and the pollution discharge assembly, a detachable filter element is arranged in the air inlet pipe, an air outlet pipe is arranged on the top of the shell above the spraying assembly, a heat exchange assembly is arranged in the shell corresponding to the air inlet pipe, and the heat exchange assembly is used for heating water entering the spraying assembly. The heat exchange assembly arranged in the shell corresponding to the air inlet pipe can heat the high-temperature oil fume waste gas entering the shell through the air inlet pipe, so that the water in the spraying assembly can be heated, and part of the heat in the high-temperature oil fume waste gas can be recycled. Meanwhile, the spraying assembly can spray hot water, so that the oil stains accumulated on the electrostatic adsorption assembly and the heat exchange assembly below can be washed clean.

Description

Technical Field

[0001] This application relates to the technical field of electrostatic precipitator equipment, and more specifically, to a wet electrostatic precipitator equipment. Background Technology

[0002] Wet electrostatic precipitator is a purification technology that combines the principles of wet washing and electrostatic dust removal. It is especially suitable for high humidity and high viscosity oil fume scenarios (such as catering frying and food processing), and can effectively solve the pain points of traditional purification technologies such as easy clogging and difficult maintenance.

[0003] Unlike traditional dry electrostatic precipitators, wet electrostatic precipitators use a spray system above the electrostatic field. This system is intermittently activated to rinse the electrostatic field, removing oil adsorbed on the inner wall of the anode tube and preventing oil buildup that could cause the electrostatic field to fail. However, in practice, the fumes generated in restaurant frying and food processing are mostly high-temperature fumes. A significant portion of the heat in these high-temperature fumes can be recovered and reused. Existing wet electrostatic precipitators lack components for recovering and utilizing this heat, resulting in a waste of heat from the high-temperature fumes. Utility Model Content

[0004] The purpose of this application is to provide a wet electrostatic oil fume removal device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: A wet electrostatic precipitator for removing oil fumes includes a housing. Inside the housing, from top to bottom, are a spray assembly, an electrostatic adsorption assembly, and a drain assembly. An air inlet pipe is provided on the outer wall of the housing, located between the electrostatic adsorption assembly and the drain assembly. A removable filter element is provided inside the air inlet pipe. An air outlet pipe is provided at the top of the housing, located above the spray assembly. A heat exchange assembly is provided inside the housing corresponding to the air inlet pipe, which is used to heat the water entering the spray assembly.

[0006] Preferably, the upper side of the air inlet pipe is provided with an insertion interface for inserting the filter element, and the inner side wall of the air inlet pipe is provided with a limiting block extending into the insertion interface. The filter element is inserted and installed between the limiting blocks. The upper end of the limiting block is provided with a threaded hole. The insertion interface is provided with a cover plate for pressing the filter element into the air inlet pipe. The four corners of the cover plate are provided with mounting holes corresponding to the threaded holes, and bolts are threaded into the threaded holes in the mounting holes.

[0007] Preferably, the heat exchange assembly includes heat exchange frames arranged opposite each other, multiple heat exchange plates arranged in parallel between the heat exchange frames, and heat exchange coils passing through the multiple heat exchange plates; the heat exchange assembly also includes a water tank located on the outer wall of the shell, one end of the heat exchange coil is connected to the water tank, and the other end is connected to the heat exchange assembly.

[0008] Preferably, the water tank is equipped with a water inlet pipe and a chemical dosing pipe, and a stirring element for agitating the water in the water tank is provided inside the water tank and at the bottom.

[0009] Preferably, the stirring component includes a rotating shaft arranged along the length of the water tank, the rotating shaft is rotatable, the rotating shaft is provided with a spiral stirring blade, and a motor for driving the rotating shaft is provided on the outer wall of the water tank.

[0010] Preferably, the spray assembly includes mounting plates arranged opposite each other, with multiple spray pipes arranged side by side between the mounting plates, and spray heads evenly distributed on the spray pipes; the spray assembly also includes a water supply pipe located outside the shell, with the spray pipes connected to the water supply pipe through conduits, and the other end of the heat exchange coil connected to the water supply pipe.

[0011] Preferably, the sewage discharge assembly includes a collection hopper and a sewage discharge pipe located at the lower end of the collection hopper and extending out of the housing.

[0012] Compared with the prior art, the beneficial effects of this application are: 1. In this application, by setting a heat exchange component in the housing corresponding to the air inlet pipe, the high-temperature oil fume exhaust gas entering the housing through the air inlet pipe can exchange heat through the heat exchange component to heat the water added to the spray component, thereby recovering and utilizing some of the heat in the high-temperature oil fume exhaust gas. At the same time, the spray component can spray hot water to better wash away the oil stains accumulated on the electrostatic adsorption component and the heat exchange component below.

[0013] 2. In this application, an oil remover can be added to the water tank through the dosing pipe, and the water in the water tank can be stirred by the agitator, thereby promoting the mixing of the oil remover with the spray water, so that a cleaning liquid is generated in the water tank and heat exchange coil, and the hot cleaning liquid sprayed by the spray assembly can improve the oil removal effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a wet electrostatic precipitator for removing oil fumes according to this application.

[0015] Figure 2 This is a schematic diagram of the internal structure of the shell in this application.

[0016] Figure 3 This is a schematic diagram of the structure between the heat exchange components and the spray components in this application.

[0017] Figure 4 This is an exploded structural diagram of the filter element installed inside the air inlet duct in this application.

[0018] Figure 5 This is a schematic diagram of the internal structure of the water tank in this application.

[0019] The meanings of the labels in the diagram are as follows: 100. Housing; 110. Air inlet duct; 120. Air outlet duct; 130. Water tank; 210. Spray assembly; 220. Electrostatic adsorption assembly; 221. Upper mounting plate; 222. Lower mounting plate; 223. Anode tube; 224. Upper electrode rack; 225. Lower electrode rack; 226. Electrode wire; 230. Sewage discharge assembly; 231. Collection hopper; 232. Sewage discharge pipe; 240. Heat exchange assembly; 310. Heat exchange frame; 320. Heat exchange fins; 330. Heat exchange coil; 340. Support plate; 341. Spray pipe; 342. Spray head; 350. Water supply pipe; 400. Filter element; 401. Outer frame; 402. Metal mesh; 411. Insertion interface; 412. Limiting block; 413. Threaded hole; 420. Cover plate; 501. Water inlet pipe; 502. Chemical dosing pipe; 510. Rotating shaft; 511. Spiral agitator; 512. Motor. Detailed Implementation

[0020] To further understand the content of this application, a detailed description of this application will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative and not intended to limit the scope of this application.

[0021] The following is in conjunction with the appendix Figures 1-5 This embodiment will be described in further detail.

[0022] like Figure 1 and Figure 2 As shown, a wet electrostatic precipitator for removing oil fumes in this embodiment includes a housing 100. Inside the housing 100, from top to bottom, are a spray assembly 210, an electrostatic adsorption assembly 220, and a wastewater discharge assembly 230. An air inlet pipe 110 is formed on the outer wall of the housing 100, located between the electrostatic adsorption assembly 220 and the wastewater discharge assembly 230. A removable filter element 400 is provided inside the air inlet pipe 110. Specifically, in conjunction with... Figure 4 As shown, a slot is provided on the outer side wall of the housing 100. The air inlet pipe 110 has an open structure at both ends, and the open ends of both ends extend outward to form a flange. The flange at one end of the air inlet pipe 110 is fixedly installed on the outer side wall of the housing 100 by screws so that the air inlet pipe 110 is installed in accordance with the slot, thereby allowing the oil fume exhaust gas to enter the housing 100 through the air inlet pipe 110. The top of the housing 100 is provided with an air outlet pipe 120 located above the spray assembly 210. Inside the housing 100, corresponding to the air inlet pipe 110, a heat exchange assembly 240 is provided to heat the water entering the spray assembly 210.

[0023] In this embodiment, combined with Figure 2As shown, the electrostatic adsorption assembly 220 includes an upper mounting plate 221 and a lower mounting plate 222 fixedly installed in the housing 100. A plurality of anode tubes 223 are arranged side by side between the upper mounting plate 221 and the lower mounting plate 222. The two ends of the anode tubes 223 are respectively arranged through the upper mounting plate 221 and the lower mounting plate 222. The electrostatic adsorption assembly 220 also includes an upper electrode frame 224 fixedly installed above the upper mounting plate 221 and a lower electrode frame 225 fixedly installed below the lower mounting plate 222. An electrode wire 226 is arranged between the upper electrode frame 224 and the lower electrode frame 225, passing through the corresponding anode tube 223. Specifically, the electrode wire 226 passes through the anode tube 223 approximately along the axis of the anode tube 223. In actual use, the oily fumes enter the housing 100 through the air inlet pipe 110. The oily fumes entering the housing 100 flow upwards, and then flow upwards through the anode pipe 223. After passing through the spray assembly 210, they are discharged outside the housing 100 through the air outlet pipe 120. When the electrostatic adsorption component 220 is energized, a high-voltage electrostatic field is formed in the anode tube 223 due to the action of the electrode wire 226. As a result, harmful substances such as oil fume particles in the oil fume exhaust gas flowing through the anode tube 223 are adsorbed onto the tube wall of the anode tube 223, thereby purifying the oil fume exhaust gas. The purified oil fume exhaust gas continues to rise and is discharged from the housing 100 through the exhaust pipe 120 via the spray component 210. Thus, the oil fume exhaust gas is purified.

[0024] In this embodiment, the oil fume particles adsorbed on the wall of the anode tube 223 continuously deposit and form oil stains. Therefore, the spray assembly 210 is turned on at regular intervals to rinse the wall of the anode tube 223, thereby achieving better cleaning of the anode tube 223.

[0025] In this embodiment, the filter element 400 is configured to pre-filter the oily exhaust gas entering the housing 100 through the air inlet pipe 110, thereby filtering out dust, sticky impurities, etc. in the oily exhaust gas, which can reduce the load on the subsequent electrostatic adsorption component 220 and prevent the subsequent anode tube 223 from accumulating scale too quickly.

[0026] Specifically, such as Figure 4 As shown, the filter element 400 includes a square column-shaped outer frame 401. The two ends of the outer frame 401 correspond to the two ends of the air inlet pipe 110 and are inserted into the air inlet pipe 110. Metal mesh 402 is provided at both ends of the outer frame 401, and composite fiber filter cotton is filled inside the outer frame 401.

[0027] In this embodiment, the heat exchange component 240 is configured to heat the water added to the spray component 210, thereby recovering and utilizing some of the heat in the high-temperature oil fume exhaust gas. At the same time, the spray component 210 can spray hot water, which can effectively wash away the oil stains accumulated on the electrostatic adsorption component 220 and the heat exchange component 240 below.

[0028] In this embodiment, the sewage discharge component 230 is disposed inside the housing 100 below the heat exchange component 240, so that it can discharge the wastewater generated by the spray component 210 rinsing the electrostatic adsorption component 220 and the heat exchange component 240 outside the housing 100.

[0029] Specifically, the sewage discharge assembly 230 includes a collection hopper 231 and a sewage discharge pipe 232 located at the lower end of the collection hopper 231 and extending out of the housing 100. The side wall of the upper opening of the collection hopper 231 is fixedly connected to the inner wall of the housing 100, and the lower opening is fixedly connected to the sewage discharge pipe 232. Thus, the collection hopper 231 can collect the wastewater generated by the spraying and discharge it through the sewage discharge pipe 232.

[0030] Combination Figure 4 As shown, in this embodiment, in order to facilitate the replacement of the filter element 400, the upper side of the air inlet pipe 110 is provided with an insertion interface 411 for inserting the filter element 400. On the opposite inner side wall of the air inlet pipe 110, there are corresponding limiting blocks 412 extending into the insertion interface 411. The filter element 400 is inserted and installed between the limiting blocks 412. The upper end of the limiting block 412 is provided with a threaded hole 413. The insertion interface 411 is provided with a cover plate 420 for pressing the filter element 400 into the air inlet pipe 110. The four corners of the cover plate 420 are provided with mounting holes corresponding to the threaded holes 413. The mounting holes are provided with bolts threaded into the threaded holes 413. In this way, the cover plate 420 can be better fixed on the outer side wall of the air inlet pipe 110 at the insertion interface 411. At this time, the cover plate 420 can press against the filter element 400 to realize the pressing of the filter element 400 into the air inlet pipe 110. In actual use, in order to ensure the sealing effect of the filter element 400 installed in the air inlet pipe 110, a sealing ring is provided on the outer peripheral side wall of the filter element 400. When the cover plate 420 presses the filter element 400, the sealing ring can seal the gap between the filter element 400 and the air inlet pipe 110 and the side wall of the cover plate 420.

[0031] Combination Figure 3As shown, in this embodiment, the heat exchange assembly 240 includes heat exchange frames 310 arranged opposite each other. The heat exchange frames 310 are fixedly installed on opposite side walls of the housing 100 by screws. Multiple heat exchange plates 320 are arranged in parallel between the heat exchange frames 310. The heat exchange plates 320 are vertically fixedly installed between the heat exchange frames 310 along the extension direction of the air inlet pipe 110. Thus, the oil fume exhaust gas entering the housing 100 from the air inlet pipe 110 can flow through the heat exchange plates 320 and flow upward within the heat exchange plates 320. Heat exchange coils 330 are inserted between the multiple heat exchange plates 320. The heat exchange coils 330 are arranged horizontally, with both ends extending from the same side of the housing 100. The heat exchange assembly 240 also includes a water tank 130 disposed on the outer side wall of the housing 100. One end of the heat exchange coil 330 is connected to the water tank 130, and the other end is connected to the heat exchange assembly 240.

[0032] In actual use, when spray water is injected into the water tank 130, the water in the water tank 130 can enter the heat exchange coil 330. At this time, the high-temperature oil fume exhaust gas enters the shell 100, and the heat on it is exchanged with the water in the heat exchange coil 330 through the heat exchange plate 320, thereby heating the water in the heat exchange coil 330, and finally turning the water in the water tank 130 and the heat exchange coil 330 into hot water. In this embodiment, the other end of the heat exchange coil 330 extends through the water storage tank 130 toward the top of the housing 100. A water pump (not shown in the figure) is provided at the other end of the heat exchange coil 330 located in the water storage tank 130. By setting the water pump, when the spray assembly 210 needs to spray, starting the water pump can pump the hot water in the heat exchange coil 330 and the water storage tank 130 into the spray assembly 210, so as to realize the spray assembly 210 spraying hot water.

[0033] In this embodiment, the spray assembly 210 includes a support plate 340 arranged opposite to each other. The support plate 340 is fixedly installed on the inner wall of the housing 100 by screws. A plurality of spray pipes 341 are arranged side by side between the support plates 340. Spray heads 342 are evenly distributed on the spray pipes 341. The spray assembly 210 also includes a water supply pipe 350 located outside the housing 100. The spray pipes 341 are connected to the water supply pipe 350 through a conduit. The other end of the heat exchange coil 330 is connected to the water supply pipe 350.

[0034] In this embodiment, the hot water in the heat exchange coil 330 is pumped into the water supply pipe 350 by the water pump, and then enters the spray pipe 341 through the conduit, so that the spray head 342 can spray hot water to rinse the anode tube 223, heat exchange plate 320 and the outer wall of the heat exchange coil 330 below, thereby better removing the oil stains on them. Combined with Figure 5As shown in this embodiment, the water tank 130 is provided with a water inlet pipe 501 and a chemical dosing pipe 502. The water inlet pipe 501 allows spray water to be added to the water tank 130, and the chemical dosing pipe 502 allows degreasing agent to be added to the water tank 130. The water tank 130 is provided with a stirring element at the bottom for stirring the water in the water tank 130, which can promote the mixing of the degreasing agent with the spray water, so that cleaning liquid is generated in the water tank 130 and the heat exchange coil 330, and the spray hot cleaning liquid sprayed by the spray assembly 210 can improve the oil removal effect.

[0035] In this embodiment, the stirring component includes a rotating shaft 510 arranged along the length of the water tank 130. The rotating shaft 510 is rotatably arranged. Specifically, the rotating shaft 510 is rotatably installed in the water tank 130 through bearings. The outer surface of the rotating shaft 510 is provided with a spiral stirring blade 511 along its extension direction. The outer wall of the water tank 130 is provided with a motor 512 for driving the rotating shaft 510 to rotate. Thus, the motor 512 can better drive the rotating shaft 510 to drive the spiral stirring blade 511 to rotate, so as to mix the degreasing agent in the spray water.

[0036] In summary, the above description is only a preferred embodiment of this application. All equivalent changes and modifications made within the scope of this application should be covered by this application.

Claims

1. A wet electrostatic precipitator for removing oil fumes, comprising a housing (100), wherein a spray assembly (210), an electrostatic adsorption assembly (220), and a sewage discharge assembly (230) are arranged from top to bottom inside the housing (100), characterized in that: An air inlet pipe (110) is provided on the outer side wall of the housing (100) between the electrostatic adsorption component (220) and the sewage discharge component (230). A removable filter element (400) is provided inside the air inlet pipe (110). An air outlet pipe (120) is provided at the top of the housing (100) above the spray component (210). A heat exchange component (240) is provided inside the housing (100) corresponding to the air inlet pipe (110). The heat exchange component (240) is used to heat the water entering the spray component (210).

2. The wet electrostatic precipitator for removing oil fumes according to claim 1, characterized in that: An insertion interface (411) for inserting a filter element (400) is provided on the upper side of the air inlet pipe (110). A limiting block (412) extending into the insertion interface (411) is provided on the inner side wall of the air inlet pipe (110). The filter element (400) is inserted and installed between the limiting blocks (412). A threaded hole (413) is provided at the upper end of the limiting block (412). A cover plate (420) for pressing the filter element (400) into the air inlet pipe (110) is provided at the insertion interface (411). The four corners of the cover plate (420) are provided with mounting holes corresponding to the threaded holes (413). Bolts threaded into the threaded holes (413) are provided in the mounting holes.

3. The wet electrostatic precipitator for removing oil fumes according to claim 1, characterized in that: The heat exchange assembly (240) includes heat exchange frames (310) arranged opposite each other, and multiple heat exchange plates (320) arranged in parallel between the heat exchange frames (310). A heat exchange coil (330) is passed through the multiple heat exchange plates (320). The heat exchange assembly (240) also includes a water tank (130) located on the outer wall of the shell (100). One end of the heat exchange coil (330) is connected to the water tank (130), and the other end is connected to the heat exchange assembly (240).

4. The wet electrostatic precipitator for removing oil fumes according to claim 3, characterized in that: The water tank (130) is provided with a water inlet pipe (501) and a chemical dosing pipe (502). Inside the water tank (130) and at the bottom, there is a stirring component for stirring the water in the water tank (130).

5. A wet electrostatic precipitator for removing oil fumes according to claim 4, characterized in that: The stirring component includes a rotating shaft (510) arranged along the length of the water tank (130). The rotating shaft (510) is rotatably arranged and has a spiral stirring blade (511) on it. A motor (512) for driving the rotating shaft (510) to rotate is provided on the outer wall of the water tank (130).

6. The wet electrostatic precipitator for removing oil fumes according to claim 3, characterized in that: The spray assembly (210) includes a support plate (340) arranged opposite to each other, and multiple spray pipes (341) are arranged side by side between the support plates (340). Spray heads (342) are evenly distributed on the spray pipes (341). The spray assembly (210) also includes a water supply pipe (350) located outside the shell (100). The spray pipes (341) are connected to the water supply pipe (350) through a conduit. The other end of the heat exchange coil (330) is connected to the water supply pipe (350).

7. The wet electrostatic precipitator for removing oil fumes according to claim 1, characterized in that: The sewage discharge assembly (230) includes a collection hopper (231) and a sewage discharge pipe (232) located at the lower end of the collection hopper (231) and extending out of the housing (100).

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