Wet dust removal device for waste gas of gasification furnace

Abstract

The utility model discloses a wet dust removal device for waste gas of a gasification furnace, which belongs to the technical field of waste gas treatment of the gasification furnace and comprises a dust removal box, a curved primary filter tank, a mixing tank and a dust removal tank are arranged in the dust removal box. According to the waste gas treatment device, when water in the curved primary filter tank is used for preliminarily removing dust in waste gas, the water at the bottom of the inner cavity of the curved primary filter tank is pumped into the inner cavity of the filter tank from the water pumping pipe by the first water pump, and the dust in the water is filtered through the filter screen in the inner cavity of the filter tank; and the filtered water is discharged back to the inner cavity of the curved primary filter tank from the water return pipe, so that the function of cleaning dust in the water in the inner cavity of the curved primary filter tank is realized, the cleanliness of the water in the inner cavity of the curved primary filter tank is ensured, the effect of cleaning the dust in the waste gas by the water is ensured, and the practicability of the wet dust removal device for the waste gas of the gasification furnace is improved.

Description

Technical Field

[0001] This utility model relates to the field of gasification furnace exhaust gas treatment technology, and more specifically, to a wet dust removal device for gasification furnace exhaust gas. Background Technology

[0002] A gasifier is a device that converts solid fuel into syngas under oxygen-deficient or limited oxygen conditions. The exhaust gas generated during the operation of a gasifier contains dust and needs to be treated.

[0003] A search revealed a utility model patent with publication number CN214159033U, which discloses a wet scrubber for waste gas treatment. The patent includes a primary filter box with an air inlet pipe on its front surface, a water-air barrier plate fixedly connected to its inner wall, a jet nozzle on the upper surface of the water-air barrier plate, a baffle plate on the inner wall of the primary filter box above the water-air barrier plate, a first exhaust port on the upper inner wall of the primary filter box, and a mixing box fixedly connected to the left surface of the primary filter box. The patent's design incorporates a diversion needle to allow larger diameter particles to drip off, reducing the number of solid particles on the filter screen and simplifying cleaning. The design also includes pre-rotating blades and nozzles facing the opposite direction of airflow to achieve more thorough mixing of water mist and airflow, improving filtration efficiency. A water tank is included for pretreatment to remove large particles and some water-soluble gases from the waste gas, further enhancing filtration and energy efficiency. However, the above patent still has the following shortcomings: after the dust in the exhaust gas is treated in the primary filter box, it is not convenient to filter the dust in the water, which affects the effect of subsequent dust cleaning. In addition, there are gaps between the diversion columns in the sedimentation box, which makes it difficult to completely remove the wet dust in the exhaust gas. Therefore, we have proposed a wet dust removal device for gasification furnace exhaust gas. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a wet dust removal device for gasification furnace exhaust gas.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A wet dust removal device for gasification furnace exhaust gas includes a dust collection box, an interior curved primary filter tank, an interior mixing tank, and an interior dust removal trough. One side of the top and the other side of the bottom of the mixing tank are respectively connected to the interior cavities of the curved primary filter tank and the dust removal trough. An air jet mechanism, a spray mechanism, and a cleaning mechanism are provided on the dust collection box. An electrostatic precipitator is installed inside the dust removal trough. A water receiving hopper is fixedly fitted to the bottom of the dust removal trough. A drain valve is fixedly installed at the bottom of the hopper. A filter box is fixedly connected to the side of the dust collector. A first water pump is fixedly installed on the side of the dust collector. The input end of the first water pump extends to the bottom of the inner cavity of the curved primary filter tank. A water pumping pipe is fixedly connected to the output end of the first water pump. The end of the water pumping pipe is fixedly sleeved to the inner cavity of the filter box. A return water pipe is fixedly sleeved to the top of the filter box. The end of the return water pipe is fixedly sleeved to the top of the inner cavity of the curved primary filter tank. A filter screen is fixedly sleeved to the inner cavity of the filter box. A sealing door is hinged to the front of the filter box.

[0007] As a preferred embodiment of the present invention, the electrostatic precipitator includes multiple connecting columns fixedly connected to the top of the inner cavity of the dust collection tank, multiple suspension plates fixedly connected to the bottom ends of the multiple connecting columns, multiple collecting electrode plates provided on the bottom surface of the multiple suspension plates, and discharge electrodes provided on the bottom surface of the multiple suspension plates.

[0008] As a preferred embodiment of this utility model, the jetting mechanism includes an air pump fixedly installed on the back of the dust collector. The output end of the air pump extends to the bottom of the inner cavity of the curved primary filter tank and is fixedly fitted with an air distribution box. Multiple one-way valves are fixedly installed on the top surface of the air distribution box.

[0009] As a preferred embodiment of this utility model, the spraying mechanism includes three water distribution pipes fixedly sleeved in the inner cavity of the mixing tank. Multiple atomizing nozzles are fixedly installed on the top of the three water distribution pipes respectively. One end of the three water distribution pipes extends to the back of the dust removal box and is fixedly installed with a four-way connector. One end of the four-way connector is fixedly connected to a water guide pipe.

[0010] As a preferred embodiment of the present invention, the cleaning mechanism includes a second water pump fixedly installed on the back of the dust removal box. The output end of the second water pump extends into the inner cavity of the dust removal tank and is fixedly fitted with a water distribution tank. The bottom surface of the water distribution tank is provided with multiple water spray holes.

[0011] As a preferred embodiment of this utility model, a water inlet pipe is fixedly sleeved on one side of the dust collector, and the end of the water inlet pipe extends to the top of the inner cavity of the curved primary filter tank. A drain valve is fixedly installed on one side of the dust collector, and the end of the drain valve extends to the bottom of the inner cavity of the curved primary filter tank. An exhaust pipe is fixedly sleeved on the other side of the dust collector, and the end of the exhaust pipe extends to the inner cavity of the dust collector tank.

[0012] As a preferred embodiment of this utility model, a control panel is fixedly installed on the front of the dust collection box.

[0013] Compared with existing technologies, the advantages of this utility model are:

[0014] (1) In this utility model, when the water in the curved primary filter tank is used to initially remove dust from the exhaust gas, the first water pump is used to pump the water at the bottom of the inner cavity of the curved primary filter tank from the water pumping pipe to the inner cavity of the filter box. The dust in the water is filtered through the filter screen in the inner cavity of the filter box. The filtered water is discharged back to the inner cavity of the curved primary filter tank through the return water pipe. This realizes the function of cleaning the dust in the water in the inner cavity of the curved primary filter tank, ensuring the cleanliness of the water in the inner cavity of the curved primary filter tank, thereby ensuring the effect of water in removing dust from the exhaust gas and improving the practicality of the gasifier exhaust gas wet dust removal device.

[0015] (2) In this utility model, when the exhaust gas enters the inner cavity of the dust removal tank, the exhaust gas moves upward between two adjacent collecting electrode plates. At the same time, the discharge electrode is used to make the dust in the exhaust gas carry an electric charge, and the charged dust moves to the collecting electrode plate. In addition, the dust that moves to the collecting electrode plate carries water, so that water droplets are formed and move downward, so that the water collection bucket collects the water droplets and dust, thereby realizing the function of completely removing the dust in the exhaust gas and improving the practicality of the gasifier exhaust gas wet dust removal device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the front of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure of the back of this utility model;

[0018] Figure 3 This is a schematic cross-sectional view of the present invention;

[0019] Figure 4 This is a cross-sectional schematic diagram of the filter box of this utility model;

[0020] Figure 5 This is a schematic diagram of the electrostatic precipitator mechanism of this utility model.

[0021] Explanation of the labels in the diagram:

[0022] 1. Dust collector; 2. Curved primary filter tank; 3. Mixing tank; 4. Dust collector tank; 5. Electrostatic precipitator; 6. Cleaning mechanism; 7. Spraying mechanism; 8. Air jetting mechanism; 9. Filter box; 10. Sealed door; 11. First water pump; 12. Water pumping pipe; 13. Filter screen; 14. Return water pipe; 15. Connecting column; 16. Suspension plate; 17. Collecting electrode plate; 18. Discharging electrode; 19. Second water pump; 20. Water distribution tank; 21. Spray nozzle; 22. Air pump; 23. Air distribution tank; 24. One-way valve; 25. Water receiving hopper; 26. Drain valve; 27. Water distribution pipe; 28. Atomizing nozzle; 29. ​​Four-way connector; 30. Water guide pipe; 31. Water inlet pipe; 32. Drain valve; 33. Exhaust pipe; 34. Control panel. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this 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 this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example:

[0027] Please see Figure 1-5A wet dust removal device for gasification furnace exhaust gas includes a dust collection box 1, a curved primary filter 2, a mixing tank 3, and a dust collection trough 4. One side of the top and the other side of the bottom of the mixing tank 3 are connected to the inner cavities of the curved primary filter 2 and the dust collection trough 4, respectively. An air jet mechanism 8, a spray mechanism 7, and a cleaning mechanism 6 are installed on the dust collection box 1. An electrostatic precipitator 5 is installed inside the dust collection trough 4. A water receiving hopper 25 is fixedly fitted to the bottom of the inner cavity of the dust collection trough 4. A drain valve 26 is fixedly installed on the dust collector 1. A filter box 9 is fixedly connected to the side of the dust collector 1. A first water pump 11 is fixedly installed on the side of the dust collector 1. The input end of the first water pump 11 extends to the bottom of the inner cavity of the curved primary filter tank 2. A water pump pipe 12 is fixedly connected to the output end of the first water pump 11. The end of the water pump pipe 12 is fixedly sleeved to the inner cavity of the filter box 9. A return water pipe 14 is fixedly sleeved to the top of the filter box 9. The end of the return water pipe 14 is fixedly sleeved to the top of the inner cavity of the curved primary filter tank 2. A filter screen 13 is fixedly sleeved to the inner cavity of the filter box 9. A sealing door 10 is hinged to the front of the filter box 9.

[0028] In this embodiment, the dust in the water is filtered and cleaned by the cooperation of the filter box 9, the first water pump 11, the water pumping pipe 12, the filter screen 13 and the return water pipe 14. In addition, the dust filtered out of the inner cavity of the filter box 9 is cleaned out by opening the sealing door 10.

[0029] For details, please refer to Figure 3 and Figure 5 The electrostatic precipitator 5 includes multiple connecting columns 15 fixedly connected to the top of the inner cavity of the dust collection tank 4. Multiple suspension plates 16 are fixedly connected to the bottom of the multiple connecting columns 15. Multiple collecting electrode plates 17 are provided on the bottom surface of the multiple suspension plates 16. Discharge electrodes 18 are provided on the bottom surface of the multiple suspension plates 16.

[0030] For details, please refer to Figure 2 and Figure 3 The jetting mechanism 8 includes an air pump 22 fixedly installed on the back of the dust collection box 1. The output end of the air pump 22 extends to the bottom of the inner cavity of the curved primary filter tank 2 and is fixedly sleeved with an air distribution box 23. Multiple one-way valves 24 are fixedly installed on the top surface of the air distribution box 23.

[0031] In this embodiment, the input end of the air pump 22 is connected to the exhaust port of the gasifier through a pipe. The air pump 22 guides the waste gas into the inner cavity of the gas distribution box 23, and the waste gas in the gas distribution box 23 is sprayed into the water in the inner cavity of the curved primary filter tank 2 through the one-way valve 24.

[0032] For details, please refer to Figures 1 to 3The spray mechanism 7 includes three water distribution pipes 27 fixedly sleeved in the inner cavity of the mixing tank 3. Multiple atomizing nozzles 28 are fixedly installed on the top of the three water distribution pipes 27 respectively. One end of the three water distribution pipes 27 extends to the back of the dust collection box 1 and is fixedly installed with a four-way connector 29. One end of the four-way connector 29 is fixedly connected to a water guide pipe 30.

[0033] In this embodiment, the water pipe 30 is connected to an external water pipe, so that external water is introduced from the water pipe 30 and the four-way connector 29 into the water distribution pipe 27, and the water in the water distribution pipe 27 is sprayed upward through the atomizing nozzle 28 so that the water mist and exhaust gas are mixed.

[0034] For details, please refer to Figure 1 and Figure 5 The cleaning mechanism 6 includes a second water pump 19 fixedly installed on the back of the dust collection box 1. The output end of the second water pump 19 extends into the inner cavity of the dust collection tank 4 and is fixedly sleeved with a water distribution tank 20. The bottom surface of the water distribution tank 20 is provided with multiple water spray holes 21.

[0035] In this embodiment, the input end of the second water pump 19 is connected to an external water pipe so as to introduce water into the water distribution tank 20 and make the water in the water distribution tank 20 spray downward from the spray hole 21, thereby cleaning the dust attached to the collecting electrode plate 17.

[0036] For details, please refer to Figures 1 to 3 A water inlet pipe 31 is fixedly connected to one side of the dust collector 1, and the end of the water inlet pipe 31 extends to the top of the inner cavity of the curved primary filter tank 2. A drain valve 32 is fixedly installed on one side of the dust collector 1, and the end of the drain valve 32 extends to the bottom of the inner cavity of the curved primary filter tank 2. An exhaust pipe 33 is fixedly connected to the other side of the dust collector 1, and the end of the exhaust pipe 33 extends to the inner cavity of the dust collector tank 4.

[0037] In this embodiment, external water is introduced into the inner cavity of the curved primary filter tank 2 through the water inlet pipe 31, and large dust particles in the exhaust gas are cleaned by the water. In addition, the wastewater in the curved primary filter tank 2 is released through the drain valve 32 to replace the water. The dust-removed exhaust gas is discharged through the exhaust pipe 33.

[0038] For details, please refer to Figure 1 A control panel 34 is fixedly installed on the front of the dust collection box 1.

[0039] In this embodiment, the device is controlled via control panel 34.

[0040] Working principle: During operation, water is first injected into the inner cavity of the curved primary filter tank 2 through the inlet pipe 31. The exhaust pump 22 is then activated to guide the exhaust gas generated by the gasifier into the inner cavity of the gas distribution box 23. Simultaneously, the exhaust gas in the gas distribution box 23 is sprayed into the water inside the curved primary filter tank 2 through the one-way valve 24. The exhaust gas moves upwards along the inner cavity of the curved primary filter tank 2, and the water removes larger-diameter dust particles from the exhaust gas. Additionally, the first water pump 11 is activated to draw water from the bottom of the inner cavity of the curved primary filter tank 2 through the water pump 12 into the inner cavity of the filter box 9. The filter screen 13 in the inner cavity of the filter box 9 filters the dust in the water. The filtered water is then discharged back into the inner cavity of the curved primary filter tank 2 through the return pipe 14. Then, the exhaust gas in the inner cavity of the curved primary filter tank 2 enters the inner cavity of the mixing tank 3, and water is guided into the inner cavity of the water distribution pipe 27 through the water guide pipe 30 and the four-way connector 29. The water in the water distribution pipe 27 is then atomized... The nozzle 28 atomizes and sprays water, allowing the atomized water to come into contact with the exhaust gas. This mixes the atomized water with the smaller-diameter dust particles in the exhaust gas. The exhaust gas then enters the inner cavity of the dust collection tank 4. As the exhaust gas moves upward between two adjacent collecting electrode plates 17, the discharge electrode 18 charges the dust particles in the exhaust gas, causing them to move onto the collecting electrode plates 17. The dust particles on the collecting electrode plates 17 also carry water, forming droplets that move downward. The water droplets and dust are collected by the water collection hopper 25, and the wastewater in the water collection hopper 25 is subsequently discharged from the drain valve 26. Finally, the dust-removed exhaust gas is discharged from the exhaust pipe 33. Additionally, the second water pump 19 is periodically activated to pump external water into the inner cavity of the water distribution tank 20, causing the water in the water distribution tank 20 to spray downward from the spray nozzle 21, thereby cleaning the dust on the collecting electrode plates 17.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A wet dust removal device for exhaust gas of a gasification furnace, comprising a dust removal tank (1), characterized in that: The inside of the dust removal box (1) is provided with a curved primary filter tank (2), the inside of the dust removal box (1) is provided with a mixing tank (3), the inside of the dust removal box (1) is provided with a dust removal tank (4), the inside of the mixing tank (3) is communicated with the inside of the curved primary filter tank (2) and the dust removal tank (4) respectively, the dust removal box (1) is provided with a jet mechanism (8), the dust removal box (1) is provided with a spraying mechanism (7), the dust removal box (1) is provided with a cleaning mechanism (6), the inside of the dust removal tank (4) is provided with an electric dust removal mechanism (5), the bottom of the inside of the dust removal tank (4) is fixedly sleeved with a water collecting hopper (25), the bottom of the water collecting hopper (25) is fixedly installed with a blowdown valve (26), the side of the dust removal box (1) is fixedly connected with a filter box (9), the side of the dust removal box (1) is fixedly installed with a first water pump (11), the input end of the first water pump (11) extends to the bottom of the inside of the curved primary filter tank (2), the output end of the first water pump (11) is fixedly connected with a water pumping pipe (12), the end of the water pumping pipe (12) is fixedly sleeved into the inside of the filter box (9), the top of the filter box (9) is fixedly sleeved with a water returning pipe (14), the end of the water returning pipe (14) is fixedly sleeved into the top of the inside of the curved primary filter tank (2), the inside of the filter box (9) is fixedly sleeved with a filter screen (13), the front of the filter box (9) is hingedly connected with a sealing door (10).

2. The wet dust removal device for waste gas of a gasifier according to claim 1, characterized in that: The electric dust removal mechanism (5) comprises a plurality of connecting columns (15) fixedly connected to the top of the inside of the dust removal tank (4), the bottom ends of the plurality of connecting columns (15) are fixedly connected with a plurality of suspension plates (16), the bottom surfaces of the plurality of suspension plates (16) are provided with a plurality of collecting electrode plates (17), and the bottom surfaces of the plurality of suspension plates (16) are provided with discharge electrodes (18).

3. The wet dust removal device for waste gas of a gasification furnace according to claim 1, characterized in that: The jet mechanism (8) comprises a gas suction pump (22) fixedly installed on the back of the dust removal box (1), the output end of the gas suction pump (22) extends to the bottom of the inside of the curved primary filter tank (2) and is fixedly sleeved with a gas distribution box (23), and the top surface of the gas distribution box (23) is fixedly installed with a plurality of one-way valves (24).

4. The wet dust removal device for waste gas of a gasification furnace according to claim 1, characterized in that: The spraying mechanism (7) comprises three water distribution pipes (27) fixedly sleeved in the inside of the mixing tank (3), the tops of the three water distribution pipes (27) are respectively fixedly installed with a plurality of atomizing nozzles (28), one end of each of the three water distribution pipes (27) extends to the back of the dust removal box (1) and is fixedly installed with a four-way joint (29), and one end of the four-way joint (29) is fixedly connected with a water guide pipe (30).

5. The wet dust removal device for waste gas of a gasification furnace according to claim 1, characterized in that: The cleaning mechanism (6) comprises a second water pump (19) fixedly installed on the back of the dust removal box (1), the output end of the second water pump (19) extends to the inside of the dust removal tank (4) and is fixedly sleeved with a water distribution box (20), and the bottom surface of the water distribution box (20) is provided with a plurality of water spraying holes (21).

6. The wet dust removal device for waste gas of a gasification furnace according to claim 1, characterized in that: One side of the dust removal box (1) is fixedly sleeved with a water inlet pipe (31), the end of the water inlet pipe (31) extends to the top of the inner cavity of the curved primary filter tank (2), one side of the dust removal box (1) is fixedly installed with a drain valve (32), the end of the drain valve (32) extends to the bottom of the inner cavity of the curved primary filter tank (2), the other side of the dust removal box (1) is fixedly sleeved with an exhaust pipe (33), the end of the exhaust pipe (33) extends to the inner cavity of the dust removal tank (4).

7. The wet dust removal device for waste gas of a gasification furnace according to claim 1, characterized in that: The front of the dust removal box (1) is fixedly installed with a control panel (34).

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