Novel wet-type electric dust removal device
By setting up a swirl assembly and a diameter-reducing tube in the wet electrostatic dust removal device, the flue gas is rotated and flowed and diffused, which solves the problem of uneven flue gas distribution; at the same time, using a water-gas heat exchanger to heat and flush water, solving the stress problem caused by water temperature changes, achieving a more efficient dust removal effect and a longer service life.
Patent Information
- Application Number
- CN202421603884.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-09
AI Technical Summary
In the existing vertical flow wet electrostatic dust removal device, the flue gas cannot dissipate quickly, resulting in uneven distribution of dust adsorbed by the anode system, affecting the dust removal effect; at the same time, the change in the water temperature sprayed by the water washing system causes stress in the device components, shortening the service life.
A new wet electro-dust removal device was designed. By installing a swirl assembly and a diameter-reducing tube before the flue gas inlet, the flue gas rotates and flows and initially diffuses, ensuring that the flue gas is distributed quickly and evenly before entering the shell; at the same time, a water-gas heat exchanger is used to heat the flue water to avoid stress caused by temperature differences.
It improves the uniform distribution of flue gas and enhances the dust removal effect; at the same time, by heating and flushing water, the stress of the device components is reduced and the service life is extended.
Smart Images
Figure CN222805338U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flue gas treatment, in particular to a novel wet electric dust removal device. Background Art
[0002] Wet electrostatic precipitator, referred to as WESP, is a new dust removal equipment used to deal with trace dust and microparticles. It can remove dust, acid mist, water droplets, aerosols, odor, PM2.5 and other harmful substances in humid gases. According to the direction of exhaust gas, it is divided into cross-flow and vertical flow. The cross-flow type is mostly a plate structure, and the gas flows in and out horizontally. The structure is similar to that of a dry electrostatic precipitator; the vertical flow type is mostly a tubular structure, and the gas flows in and out vertically. Since the dust removal efficiency of the vertical flow type is higher than that of the cross-flow type, it is more commonly used. The existing vertical flow wet electrostatic precipitator has the following defects:
[0003] 1. The flue gas entering the shell cannot be dispersed quickly before entering the cathode system and the anode system, which makes the dust adsorbed by the anode system unevenly distributed, thus affecting the dust removal effect;
[0004] 2. The water sprayed by the water washing system is prone to change with the external ambient temperature. Since the flue gas temperature is high, when the sprayed water temperature is low, it will cause greater stress on the cathode system and the anode system, thereby reducing the service life of the device. Utility Model Content
[0005] The purpose of the utility model is to provide a novel wet electrostatic precipitator in view of the deficiencies in the prior art.
[0006] To achieve the above-mentioned purpose, the utility model provides a novel wet electrostatic precipitator, comprising a shell, a cathode system, an anode system and a water washing system arranged in the shell, the shell being provided with a smoke inlet and a smoke outlet, the smoke inlet being connected to one end of a cyclone component, the other end of the cyclone component being connected to one end of a heat exchange box, the other end of the heat exchange box being connected to a smoke inlet pipe, and a water-gas heat exchanger being provided inside the shell, the water inlet of the water-gas heat exchanger being connected to a water pump through a pump outlet valve and a pipeline, the water pump being connected to a water source through a pump inlet valve and a pipeline, and the water outlet of the water-gas heat exchanger being connected to the water washing system through a water outlet valve and a pipeline.
[0007] Furthermore, a reducing pipe is connected between the smoke inlet and the swirl assembly, and the inner diameter of one end of the reducing pipe close to the smoke inlet is larger than the inner diameter of the other end thereof.
[0008] Furthermore, the swirl assembly includes a cylinder, both ends of which are fixedly connected to the reducer and the heat exchange box respectively, and a plurality of swirl blades are fixedly connected to the inner side of the cylinder.
[0009] Furthermore, the inner ends of the plurality of rotary blades are welded to the outer side of the connecting pipe.
[0010] Furthermore, the water outlet valve is also connected to a bypass valve and a through valve respectively, the bypass valve is connected to a bypass pipe, and the through valve is connected to a water washing system.
[0011] Furthermore, an inspection platform is provided on the outer side of the shell, and a ladder is provided on the lower side of the inspection platform.
[0012] Furthermore, the water-gas heat exchanger is a tube-fin heat exchanger.
[0013] Furthermore, a heat-insulating layer is provided on the outside of the pipeline.
[0014] Beneficial effects: The utility model arranges a swirl component on the front side of the smoke inlet so that the smoke turns into a rotating forward flow after passing through the swirl component, and arranges a reducer to initially diffuse the smoke. After entering the shell, the smoke can further diffuse quickly, thereby quickly distributing the smoke evenly and improving the dust removal effect; and arranges a water-to-air heat exchanger to heat the flushing water used in the flushing system to avoid greater stress on internal components when the flushing water temperature is low. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of a novel wet electrostatic precipitator according to an embodiment of the utility model;
[0016] Figure 2 It is a schematic diagram of the structure of the swirl component of the embodiment of the utility model. DETAILED DESCRIPTION
[0017] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. The embodiments are implemented based on the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.
[0018] like Figure 1As shown, the embodiment of the utility model provides a new wet electrostatic precipitator, including a shell 1, a cathode system 2, an anode system 3 and a water washing system 4 in the shell 1, wherein the cathode system 2 and the anode system 3 are respectively connected to the negative electrode and the positive electrode of the high-voltage DC power supply. The water washing system 4 includes a plurality of spray pipes arranged in parallel at the top of the inner side of the shell 1 and a plurality of nozzles arranged on the spray pipe. A flue gas inlet 5 and a flue gas outlet 6 are provided on the shell 1, and the above are all prior art and will not be repeated. The flue gas inlet 5 of the utility model embodiment is connected to one end of the cyclone component 7, the other end of the cyclone component 7 is connected to one end of the heat exchange box 5, and the other end of the heat exchange box 8 is connected to the smoke inlet pipe. A water-gas heat exchanger 9 is provided inside the heat exchange box 8, and the water-gas heat exchanger 9 is preferably a tube-fin heat exchanger. The water inlet of the water-gas heat exchanger 9 is connected to the water pump 11 through the outlet pump valve 10 and the pipeline, and the water pump 11 is connected to the water source through the inlet pump valve 12 and the pipeline, and the above water source can be groundwater or tap water. The water outlet of the water-gas heat exchanger 9 is connected to the water washing system through the water outlet valve 13 and the pipeline. A heat preservation layer can also be arranged on the outside of the above pipeline to prevent the water in the pipeline from freezing or rapidly decreasing in temperature when the ambient temperature is low.
[0019] A reducer 14 is connected between the smoke inlet 5 and the swirl assembly 7 of the embodiment of the utility model, and the inner diameter of the reducer 14 at one end close to the smoke inlet 5 is larger than the inner diameter of the other end. After passing through the swirl assembly 7, the smoke will rotate and flow forward, initially diffuse outward in the reducer 14, and further diffuse outward after entering the housing 1, which is conducive to rapid and uniform distribution of the smoke.
[0020] The swirl assembly 7 of the embodiment of the utility model includes a cylinder 71, and the two ends of the cylinder 71 are fixedly connected to the reducer 14 and the heat exchange box 8, respectively. Preferably, a flange is provided at the two ends of the cylinder 1, the reducer 14 and the heat exchange box 8, respectively, so as to be fixedly connected by flanges, which is convenient for disassembly during maintenance. A plurality of rotary blades 72 are fixedly connected to the inner side of the cylinder 71. The rotary blades 72 play a role in changing the direction of flue gas flow. After the horizontal flue gas discharged from the heat exchange box 8 passes through the rotary blades 72, the flue gas will rotate and flow forward. In order to improve the stability of the rotary blades 72 without significantly increasing the flow resistance, it is preferred that the inner ends of the plurality of rotary blades 72 are welded to the outer side of the connecting pipe 73.
[0021] If there is no need to continuously cool the flue gas, when the water washing system 4 is not working, the water pump 11 can be stopped. If there is a need to continuously cool the flue gas, the water outlet valve 13 can be connected to the bypass valve 15 and the through valve 16 respectively, the bypass valve 15 is connected to the bypass pipe, and the through valve 16 is connected to the water washing system 4. When the water washing system 4 is not working, the water pump 11 can be kept running, and the bypass valve 15 can be opened and the through valve 16 can be closed, so that the water-gas heat exchanger 9 can continue to cool the flue gas, and the bypass pipe can supply the heated hot water to the designated location; when the water washing system is working, the bypass valve 15 can be closed and the through valve 16 can be opened.
[0022] In order to facilitate maintenance, a maintenance platform 17 is provided on the outside of the shell 1, and a ladder 18 is provided on the lower side of the maintenance platform 17 so that the user can climb up to the maintenance platform 17 via the ladder 18 to perform maintenance work.
[0023] During use, when the water washing system 4 is working, the water supplied by the water pump 11 to the water-gas heat exchanger 9 exchanges heat with the flue gas, so that the water temperature in the water-gas heat exchanger 9 increases, and then it is supplied to the water washing system 4 to avoid the water temperature being too low; at the same time, the flue gas temperature is lowered and then sent to the swirl component 7, so that the flue gas generates a swirl and then enters the reducer 14 for preliminary diffusion, and then enters the shell 1 for further diffusion, so that the flue gas can be quickly and evenly distributed.
[0024] The above is only a preferred embodiment of the utility model. It should be pointed out that for ordinary technicians in this technical field, other parts not specifically described belong to the prior art or common knowledge. Under the premise of not departing from the principle of the utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the utility model.
Claims
1. A novel wet electrostatic precipitator, comprising a housing, a cathode system, an anode system and a water washing system arranged in the housing, wherein a flue gas inlet and a flue gas outlet are arranged on the housing, and characterized in that: The smoke inlet is connected to one end of the cyclone component, the other end of the cyclone component is connected to one end of the heat exchange box, the other end of the heat exchange box is connected to the smoke inlet pipe, and a water-gas heat exchanger is provided inside it, the water inlet of the water-gas heat exchanger is connected to the water pump through a pump outlet valve and a pipeline, the water pump is connected to a water source through a pump inlet valve and a pipeline, and the water outlet of the water-gas heat exchanger is connected to a water washing system through a water outlet valve and a pipeline.
2. A novel wet electrostatic precipitator according to claim 1, characterized in that: A reducing pipe is connected between the smoke inlet and the swirl assembly, and the inner diameter of one end of the reducing pipe close to the smoke inlet is larger than the inner diameter of the other end.
3. A novel wet electrostatic precipitator according to claim 2, characterized in that: The swirl assembly comprises a cylinder, two ends of which are fixedly connected to the reducer and the heat exchange box respectively, and a plurality of swirl blades are fixedly connected to the inner side of the cylinder.
4. A novel wet electrostatic precipitator according to claim 3, characterized in that: The inner ends of the plurality of rotary blades are all welded to the outer side of the connecting pipe.
5. A novel wet electrostatic precipitator according to claim 1, characterized in that: The water outlet valve is also connected to a bypass valve and a through valve respectively. The bypass valve is connected to a bypass pipe, and the through valve is connected to a water washing system.
6. A novel wet electrostatic precipitator according to claim 1, characterized in that: An inspection platform is provided on the outer side of the shell, and a ladder is provided on the lower side of the inspection platform.
7. A novel wet electrostatic precipitator according to claim 1, characterized in that: The water-gas heat exchanger is a tube-fin heat exchanger.
8. A novel wet electrostatic precipitator according to claim 1, characterized in that: A heat-insulating layer is arranged on the outside of the pipeline.