Tandem type large electrostatic dust collection equipment
By adopting parallel connectors and improving gray outlet design in large electrostatic dust collectors, the problems of uneven pressure and dust adhesion in series electrostatic dust collectors are solved, and efficient dust removal effect is achieved.
Patent Information
- Application Number
- CN202421789147.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-26
AI Technical Summary
In large thermal power plants, the series electrostatic dust collector causes the first dust collector to bear a large pressure, and the subsequent dust collector’s dust removal effect is reduced. At the same time, the dust in the ash bin is difficult to shake off due to water vapor, which affects the normal operation of the dust collector.
A large series electrostatic dust removal device is adopted, and the first electrostatic dust removal device is connected in parallel with the second electrostatic dust removal device through the connector, and an annular tube and a jet head are arranged in the connector to smoothly transition the air flow, improve the ash outlet design of the ash outlet of the ash outlet of the ash outlet, and add a soot blowing function to promote dust discharge using high-pressure gas.
It effectively avoids the problem of excessive pressure on the first dust collector, ensures the efficient operation of subsequent dust removal equipment, solves the problem of dust adhesion in the ash bin, and significantly improves the dust removal efficiency.
Smart Images
Figure CN222901353U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of electrostatic precipitators, in particular to a series-connected large-scale electrostatic precipitator device. Background Technique
[0002] In the process of treating the tail gas of thermal power plants, electrostatic precipitators are a commonly used high-efficiency dust removal equipment. Traditional electrostatic precipitators make dust particles charged in an electric field and then adsorb them on the dust collecting plate for separation, thereby achieving the purification of the tail gas.
[0003] Pressure problem of series-connected precipitators: In large thermal power plants, in order to improve the dust removal efficiency, multiple electrostatic precipitators are often connected in series. However, this series connection method will cause the first precipitator to bear a large pressure, and the dust removal effect of subsequent precipitators will be reduced accordingly. The bottom ash bin of the existing electrostatic precipitator is usually equipped with a vibrator for regularly vibrating and discharging the ash in the ash bin. However, since electrostatic precipitators are mostly in outdoor environments, especially in winter, the water vapor generated after the circulating water flushes the ash will enter the ash bin, causing the ash in the ash bin to adhere to water and form lumps that are difficult to vibrate off, affecting the normal operation of the precipitator. The falling ash of the electrostatic precipitator is directly discharged into the ash flushing ditch, but due to the above adhesion problem, the ash discharge efficiency is not ideal, and the ash in the ash bin cannot be effectively discharged, resulting in an accumulation problem. Content of the Utility Model
[0004] The main purpose of the utility model is to provide a series-connected large-scale electrostatic precipitator device to solve the problem that the series connection method will cause the first precipitator to bear a large pressure, and the dust removal effect of subsequent precipitators will be reduced accordingly.
[0005] To solve the above technical problems, the technical solution adopted by the utility model is: a series-connected large-scale electrostatic precipitator device, the first electrostatic precipitator device and the second electrostatic precipitator device are connected end to end through a connector. The connector includes two inlet covers and outlet covers with a horn-shaped structure. The inlet cover and the outlet cover are connected at the reduced diameter position. At least one annular pipe is arranged inside the outlet cover, and a plurality of jet heads facing the outlet direction of the outlet cover are arranged on the annular pipe. The gas tank is communicated with the annular pipe through an air inlet pipe.
[0006] In a preferred solution, a sleeve is sleeved on the ash outlet of a plurality of ash buckets at the lower parts of the first electrostatic precipitator device and the second electrostatic precipitator device. A gap is left between the inner wall of the sleeve and the outer wall of the ash outlet. One side of the sleeve is communicated with an air filling pipe, and the air filling pipe is communicated with the gas tank.
[0007] In a preferred solution, the ash blowing port of the sleeve extends out of the end of the ash outlet.
[0008] In a preferred solution, the annular pipe is arranged on the inner wall of the outlet cover through a plurality of fixing seats.
[0009] In a preferred embodiment, the air outlet of the second electrostatic dust removal device is connected to the exhaust pipe, and the exhaust pipe is connected to the exhaust duct through a suction fan.
[0010] In a preferred embodiment, the air pump is connected to the air tank through a valve.
[0011] The present utility model provides a series-connected large-scale electrostatic dust removal device. By connecting the first electrostatic dust removal device and the second electrostatic dust removal device in parallel and using a connector to ensure a smooth transition of the air flow, the problem that the first dust collector in the series layout bears too much pressure is effectively avoided, and at the same time, the efficient operation of the subsequent dust removal devices is ensured. The annular pipe and the jet heads thereon in the connector can eject high-pressure gas, which not only helps to form a negative pressure at the inlet hood, but also can guide the air flow to flow more smoothly from the first electrostatic dust removal device into the second electrostatic dust removal device, improving the air flow distribution uniformity and dust removal efficiency of the overall system. A sleeve with a dust blowing function is installed at the ash outlet of the ash bucket. Through the negative pressure formed by the improved ash outlet of the ash bucket and the high-pressure gas, the dust inside the ash bucket will be discharged faster. The present invention effectively solves the problem of ash adhesion in the ash bin of the electrostatic dust collector and significantly improves the dust removal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The present utility model will be further described below in conjunction with the drawings and embodiments:
[0013] Figure 1 is the overall connection structure diagram of the present utility model;
[0014] Figure 2 is the installation structure diagram of the ash bucket and the sleeve of the present utility model;
[0015] Figure 3 is the connector structure diagram of the present utility model;
[0016] Figure 4 is the front view sectional structure diagram of the connector of the present utility model.
[0017] In the figure: the first electrostatic dust removal device 1; the second electrostatic dust removal device 2; the connector 3; the inlet hood 301; the outlet hood 302; the annular pipe 303; the jet head 304; the fixed seat 305; the intake pipe 306; the ash bucket 4; the ash outlet 401; the exhaust pipe 5; the suction fan 6; the exhaust duct 7; the air tank 8; the air pump 9; the sleeve 10; the charging pipe 11; the dust blowing port 1001. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] As Figures 1 to 4As shown in the figure, a series-connected large-scale electrostatic precipitator. The first electrostatic precipitator 1 and the second electrostatic precipitator 2 are connected end to end through a connector 3. The connector 3 includes an inlet hood 301 and an outlet hood 302 with two horn-shaped structures. The inlet hood 301 and the outlet hood 302 are connected at the necking position. At least one annular tube 303 is provided inside the outlet hood 302. A plurality of jet nozzles 304 facing the outlet direction of the outlet hood 302 are provided on the annular tube 303. The gas tank 8 is connected to the annular tube 303 through an air inlet pipe 306.
[0019] When the gas passes through the first electrostatic precipitator 1, the gas after preliminary purification will be introduced into the connector 3. The high-pressure gas is transported from the gas tank 8 to the annular tube 303 via the air inlet pipe 306 and ejected through the jet nozzles 304. The ejected high-pressure gas forms a high-speed air flow in the outlet hood 302, which helps to guide the gas inside the first electrostatic precipitator 1 into the second electrostatic precipitator 2. At the same time, the high-speed air flow generated by the jet nozzles 304 will form a negative pressure at the inlet hood 301, which helps the gas to transition smoothly. The gas purified again by the second electrostatic precipitator 2 is discharged through the exhaust pipe 5, the exhaust fan 6 and the exhaust duct 7.
[0020] The design of connecting the inlet hood 301 and the outlet hood 302 at the necking position can form a relatively narrow area inside the connector 3. This area helps to increase the speed of the air flow, thereby increasing the air pressure. By connecting at the necking position, the Bernoulli principle can be utilized to form a higher speed and a lower pressure at the necking, which helps to transfer the air flow from the first electrostatic precipitator 1 to the second electrostatic precipitator 2 smoothly.
[0021] When the high-pressure gas is transported from the gas tank 8 to the annular tube 303 through the air inlet pipe 306, the jet nozzles 304 will eject high-speed air flows. These high-speed air flows help to further compress and guide the air flow, ensuring a smooth transition of the air flow to the next dust removal device.
[0022] In a preferred embodiment, a sleeve 10 is sleeved on the ash outlet 401 of a plurality of ash buckets 4 at the lower parts of the first electrostatic precipitator 1 and the second electrostatic precipitator 2. A gap is left between the inner wall of the sleeve 10 and the outer wall of the ash outlet 401. One side of the sleeve 10 is connected to an air filling pipe 11, and the air filling pipe 11 is connected to the gas tank 8. One side of the sleeve 10 is connected to the air filling pipe 11, and the air filling pipe 11 is then connected to the gas tank 8, so as to provide high-pressure gas for the sleeve 10.
[0023] Install a socket 10 with a dust blowing function on the ash outlet 401 of the ash discharging bucket 4. Through the negative pressure effect formed by the socket 10 and high-pressure gas, it can effectively promote the rapid discharge of dust inside the ash discharging bucket 4. By using the high-pressure gas dust blowing function, the problem of unsmooth ash discharge of the traditional electrostatic precipitator is solved, ensuring the smooth discharge of ash and reducing the ash accumulation in the ash bin. The improved ash discharging system not only solves the problem of ash adhesion, but also indirectly improves the dust removal efficiency of the entire electrostatic dust removal equipment by improving the ash discharge efficiency.
[0024] In a preferred embodiment, the dust blowing port 1001 of the socket 10 extends out of the end of the ash outlet 401. When the high-pressure gas is ejected from the dust blowing port 1001 of the socket 10, it will generate a strong air flow at the end of the ash outlet 401, which helps to blow the ash out of the ash outlet 401. At the same time, since the dust blowing port 1001 extends out of the end of the ash outlet 401, the ejected high-pressure gas will form a negative pressure inside the ash outlet 401, which helps to accelerate the discharge of dust. By blowing the high-pressure gas from the dust blowing port 1001, the rapid discharge of dust inside the ash discharging bucket 4 can be effectively promoted.
[0025] In a preferred embodiment, the annular pipe 303 is arranged on the inner wall of the outlet hood 302 through a plurality of fixing seats 305. It is used to fix the position of the annular pipe 303, which is convenient for disassembly and installation.
[0026] In a preferred embodiment, the air outlet of the second electrostatic dust removal device 2 is communicated with the exhaust pipe 5, and the exhaust pipe 5 is communicated with the exhaust duct 7 through the exhaust fan 6. The gas purified again by the second electrostatic dust removal device 2 is discharged through the exhaust pipe 5, the exhaust fan 6 and the exhaust duct 7.
[0027] In a preferred embodiment, the air pump 9 is communicated with the air tank 8 through a valve. The air pump 9 inflates the air tank 8 to provide air pressure.
[0028] The above embodiments are only the preferred technical solutions of the present invention, and should not be regarded as a limitation to the present invention. The protection scope of the present invention should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.
Claims
1. A large-scale tandem electrostatic dust removal device, characterized in that: The first electrostatic precipitator (1) and the second electrostatic precipitator (2) are connected end to end via a connector (3); the connector (3) comprises an inlet cover (301) and an outlet cover (302) of two trumpet-shaped structures; the inlet cover (301) and the outlet cover (302) are connected at a constricted position; at least one annular tube (303) is provided inside the outlet cover (302); a plurality of jet heads (304) are provided on the annular tube (303) facing the outlet direction of the outlet cover (302); and the gas tank (8) is connected to the annular tube (303) via an inlet pipe (306).
2. A large-scale tandem electrostatic precipitator according to claim 1, characterized in that: A sleeve (10) is sleeved on the ash outlets (401) of the plurality of ash outlet buckets (4) at the bottom of the first electrostatic precipitator (1) and the second electrostatic precipitator (2); a gap is left between the inner wall of the sleeve (10) and the outer wall of the ash outlet (401); one side of the sleeve (10) is connected to an air charging pipe (11), and the air charging pipe (11) is connected to an air tank (8).
3. According to claim 1, a large-scale tandem electrostatic precipitator is characterized in that: The soot blowing port (1001) of the sleeve (10) extends out of the end of the soot outlet (401).
4. According to claim 1, a large-scale tandem electrostatic precipitator is characterized in that: The annular tube (303) is arranged on the inner wall of the outlet cover (302) via a plurality of fixing seats (305).
5. According to claim 1, a large-scale tandem electrostatic precipitator is characterized in that: The air outlet of the second electrostatic dust removal device (2) is connected to the exhaust pipe (5), and the exhaust pipe (5) is connected to the exhaust pipe (7) through the exhaust fan (6).
6. A large-scale tandem electrostatic precipitator according to claim 1, characterized in that: The air pump (9) is connected to the air tank (8) through a valve.