Energy-saving flue gas purification and dehumidification device

Abstract

The utility model provides an energy-saving flue gas purification dehumidification device, which relates to the technical field of flue gas purification, and comprises a tower body and a surge tank, a gas inlet is arranged below one side of the tower body, an exhaust port is arranged in the middle of the top of the tower body, a slurry tank is arranged at the bottom of the interior of the tower body, and a water outlet is arranged at the bottom of the tower body. A slurry tank is arranged in the tower body, a first spraying part is arranged in the tower body above the slurry tank, the first spraying part is located above the air inlet, a first pipeline is connected between the first spraying part and the slurry tank, a collecting hopper is arranged at the middle end in the tower body, a second spraying part is arranged in the tower body above the collecting hopper, and a second pipeline is connected between the second spraying part and the slurry tank. A second pipeline is connected between the second spraying piece and the pressure stabilizing tank; on the premise that the purification effect is maintained, the lift and the spraying pressure are reduced to the maximum extent, the flue investment and the fan energy consumption are reduced, flue gas side series connection and absorbent side series connection are achieved, the flue gas purification efficiency can be improved, multiple purification can be achieved through a single tower body, the occupied area is small, and the energy consumption is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to flue gas purification technical field especially, relates to a kind of energy-saving flue gas purification dehumidification device. BACKGROUND

[0002] Limestone-gypsum wet desulfurization is the most widely used and reliable flue gas treatment process in the world at present, which uses limestone slurry as absorbent to wash and react with flue gas in the absorption tower to remove SO2 in flue gas;

[0003] The commonly used absorption device is the first generation of single-tower circulating absorption device, the second generation of double-tower device and single-tower multi-stage absorption device. These absorption devices all use flue gas side cascade absorption to remove harmful gases. In order to meet the environmental protection emission requirements, circulating pumps are used to transport the absorbent to the spraying area. In this process, high-energy consumption motors are needed to use pumps with large spraying lift to cover a large area of the spraying area. This also causes the spraying pressure to be too large, which makes the flue gas pass through a larger resistance, resulting in high energy consumption, high investment and operating cost of the fan. The flue gas after purification treatment is not only low in temperature but also contains too much water, which affects the flue gas lifting height and the atmospheric environment. Therefore, the utility model provides an energy-saving flue gas purification dehumidification device to solve the problems in the prior art. SUMMARY

[0004] To solve the above problems, the utility model provides an energy-saving flue gas purification dehumidification device. The energy-saving flue gas purification dehumidification device maximizes the reduction of lift and spraying pressure under the premise of maintaining the purification effect, reduces the flue investment and fan energy consumption, realizes the connection of flue gas side and absorbent side, effectively removes water in flue gas and recycles, improves the "smoke plume" condition, improves the flue gas purification efficiency and the influence on the environment. A single tower body can realize multiple purification, occupies less land and has low energy consumption. To achieve the purpose of the utility model, the following technical solutions are used: an energy-saving flue gas purification dehumidification device includes a tower body and a pressure stabilizing tank. A gas inlet is arranged below one side of the tower body, and an exhaust port is arranged at the middle position of the top of the tower body. A slurry pool is arranged at the bottom of the inside of the tower body, and a first spraying element is arranged in the inside of the tower body at the position above the slurry pool. The first spraying element is located above the gas inlet, and a first pipeline is connected between the first spraying element and the slurry pool. A collecting hopper is arranged at the middle end of the inside of the tower body, and a second spraying element is arranged in the inside of the tower body at the position above the collecting hopper. A second pipeline is connected between the second spraying element and the pressure stabilizing tank. A transmission pipe is obliquely connected between the bottom of the collecting hopper and the pressure stabilizing tank. An overflow pipe is connected between the side of the pressure stabilizing tank and the slurry pool above;

[0005] The first pipeline is provided with a first liquid driving member, the second pipeline is provided with a second liquid driving member, the slurry tank and the pressure stabilizing tank are both provided with an absorbent, and the upper portion of the tower body is provided with a demister and a dehumidifying device from bottom to top.

[0006] Further improvement lies in that the dehumidifying device comprises an outer cylinder and an inner cylinder pipe bundle, the top of the tower body is provided with a support beam, the outer cylinder is arranged above the support beam, the inner cylinder pipe bundle is arranged on the inner side of the outer cylinder, and the upper portion of the inner cylinder pipe bundle penetrates through the support beam, the upper portion of the outer cylinder is provided with a flue gas passage opening along the circumferential direction of the cylinder, and one side of the bottom of the outer cylinder is provided with a drain pipe extending out of the tower body.

[0007] Further improvement lies in that the upper portion of the support beam is provided with a cover plate, the upper end of the inner cylinder pipe bundle penetrates through the cover plate, and a sealing plate is arranged between the outer side of the cover plate and the inner wall of the tower body.

[0008] Further improvement lies in that the first spraying member comprises a first spraying pipe and a first spray head, the first spray head is arranged below the first spraying pipe, and the first spray head is provided with a plurality of groups, the first spraying pipe is connected with the first pipeline, and the tower body is provided with a first cleaning door at the position of the front side of the first spraying pipe.

[0009] Further improvement lies in that the first liquid driving member comprises a first circulating pump and a first valve, and the first circulating pump and the first valve are both arranged on the first pipeline.

[0010] Further improvement lies in that the second spraying member comprises a second spraying pipe and a second spray head, the second spray head is arranged below the second spraying pipe, and the second spray head is provided with a plurality of groups, the second spraying pipe is connected with the second pipeline, and the tower body is provided with a second cleaning door at the position of the front side of the second spraying pipe.

[0011] Further improvement lies in that the second liquid driving member comprises a second circulating pump and a second valve, and the second circulating pump and the second valve are both arranged on the second pipeline.

[0012] Further improvement lies in that the middle portion of the outer wall of the tower body is recessed inward to form a funnel, the funnel is arranged between the collecting hopper and the second spraying member, the outer side of the collecting hopper is fixed with the tower body through a flow guide plate, and the flow guide plate is arranged at an equal angle around the center of the tower body.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. This utility model discharges flue gas into the tower body through the inlet and flows upward into the first spray element area. The absorbent in the slurry tank flows into the first spray element area through the first pipe. After reacting with the harmful substances in the flue gas, the absorbent flows into the slurry tank. The reacted flue gas then flows upward into the second spray element area. The absorbent in the pressure stabilizing tank flows to the second spray element area through the second pipe. After reacting with the harmful substances in the flue gas, the absorbent flows into the pressure stabilizing tank through the collection hopper. The clean gas is discharged after being dehumidified and dust-removed by the demister and dehumidifier. The overflow in the pressure stabilizing tank enters the slurry tank through the overflow pipe. Throughout the process, the first spray element and the slurry tank are close together, and the second spray element and the collection hopper are close together. While maintaining the purification effect, the head and spray pressure are minimized, reducing flue gas investment and fan energy consumption. It also achieves flue gas side-connection and absorbent side-connection, which can improve flue gas purification efficiency. A single tower body can achieve multiple purifications, occupying less space and consuming less energy.

[0015] 2. In the dehumidification process of this utility model, the flue gas enters the outer cylinder through the flue gas passage, then flows down around the outside of the inner cylinder tube bundle to the bottom of the outer cylinder, and then enters the inner cylinder tube bundle again to rise, and is discharged into the atmosphere through the exhaust port. The water generated by collision and condensation is collected at the bottom of the outer cylinder and discharged through the drain pipe for recycling, thereby reducing system water consumption and saving water resources. Attached Figure Description

[0016] Figure 1 This is a diagram of the internal structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the dehumidification device of this utility model;

[0018] Figure 3 This is an external schematic diagram of the present invention.

[0019] The components are as follows: 1. Tower body; 2. Pressure stabilizing tank; 3. Air inlet; 4. Exhaust outlet; 5. Slurry pool; 6. First pipe; 7. Collection hopper; 8. Second pipe; 9. Overflow pipe; 10. Demister; 11. Dehumidifier; 12. Outer cylinder; 13. Inner cylinder tube bundle; 14. Support beam; 15. Flue gas passage opening; 16. Drain pipe; 17. Cover plate; 18. Sealing plate; 19. First spray pipe; 20. First nozzle; 21. First cleaning door; 22. First circulation pump; 23. First valve; 24. Second spray pipe; 25. Second nozzle; 26. Second cleaning door; 27. Second circulation pump; 28. Second valve; 29. ​​Funnel; 30. Guide plate. Detailed Implementation

[0020] To deepen the understanding of this utility model, the following detailed description will be provided in conjunction with embodiments. These embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model.

[0021] Example one

[0022] According to Figure 1 、 2 , 3, the embodiment proposes an energy-saving flue gas purification and dehumidification device, which comprises a tower body 1 and a pressure stabilizing tank 2. A gas inlet 3 is arranged at the lower side of one side of the tower body 1, and an exhaust port 4 is arranged at the middle position of the top of the tower body 1. A slurry pool 5 is arranged at the bottom of the inside of the tower body 1, and a first spraying member is arranged at the inside of the tower body 1 at the position above the slurry pool 5. The first spraying member is located at the position above the gas inlet 3, and a first pipeline 6 is connected between the first spraying member and the slurry pool 5. A collecting hopper 7 is arranged at the middle end of the inside of the tower body 1, and a second spraying member is arranged at the inside of the tower body 1 at the position above the collecting hopper 7. A second pipeline 8 is connected between the second spraying member and the pressure stabilizing tank 2. A transmission pipe is obliquely connected between the bottom of the collecting hopper 7 and the pressure stabilizing tank 2. An overflow pipe 9 is connected between the upper side of the pressure stabilizing tank 2 and the slurry pool 5.

[0023] A first liquid driving member is arranged on the first pipeline 6, and a second liquid driving member is arranged on the second pipeline 8. Absorbents are arranged in the slurry pool 5 and the pressure stabilizing tank 2. A demister 10 and a dehumidification device 11 are arranged in the inside of the tower body 1 from bottom to top. In use, flue gas is discharged from the gas inlet 3 into the tower body 1 and flows upward, enters the first spraying member area, and the absorbent in the slurry pool 5 flows into the first spraying member area through the first pipeline 6. After the absorbent reacts with the harmful substances in the flue gas, it flows into the slurry pool 5. The reacted flue gas flows upward into the second spraying member area. The absorbent in the pressure stabilizing tank 2 flows to the second spraying area through the second pipeline 8. After the absorbent reacts with the harmful substances in the flue gas, it flows into the pressure stabilizing tank 2 through the collecting hopper 7. Clean gas is discharged after being dehumidified and dedusted by the demister 10 and the dehumidification device 11. The overflow in the pressure stabilizing tank 2 enters the slurry pool 5 through the overflow pipe 9.

[0024] The dehumidification device comprises an outer cylinder 12 and an inner cylinder pipe bundle 13. A support beam 14 is arranged at the top of the inside of the tower body 1. The outer cylinder 12 is arranged above the support beam 14. The inner cylinder pipe bundle 13 is arranged at the inner side of the outer cylinder 12, and the upper side of the inner cylinder pipe bundle 13 passes through the support beam 14. A flue gas passage 15 is arranged at the upper side of the outer cylinder 12 along the circumference of the cylinder, and a drain pipe 16 extending out of the tower body 1 is arranged at one side of the bottom of the outer cylinder 12. A cover plate 17 is arranged above the support beam 14. The upper end of the inner cylinder pipe bundle 13 penetrates through the cover plate 17. A sealing plate 18 is arranged between the outer side of the cover plate 17 and the inner wall of the tower body 1. In dehumidification, flue gas enters the outer cylinder 12 from the flue gas passage 15, then flows downward along the outer side of the inner cylinder pipe bundle 13 to the bottom of the outer cylinder 12, and then flows upward in the inner cylinder pipe bundle 13, and is discharged into the atmosphere through the exhaust port 4. The water produced by collision and condensation is collected at the bottom of the outer cylinder 12 and is discharged through the drain pipe 16 for recycling, thereby reducing water consumption of the system and saving water resources.

[0025] The first spray member includes a first spray pipe 19 and a first spray head 20, the first spray head 20 is arranged below the first spray pipe 19, and the first spray head 20 is provided in multiple groups, the first spray pipe 19 is connected with the first pipeline 6, and the first cleaning door 21 is arranged on the tower body 1 at a position in front of the first spray pipe 19. The first liquid driving member includes a first circulating pump 22 and a first valve 23, and the first circulating pump 22 and the first valve 23 are arranged on the first pipeline 6. In use, the first valve 23 is opened, and the first circulating pump 22 is started, so that the absorbent in the slurry pool 5 flows into the first spray member area through the first pipeline 6, and is sprayed through the first spray pipe 19 and the first spray head 20, and after the absorbent reacts with the harmful substances in the flue gas, the absorbent flows into the slurry pool 5. In cleaning, the first cleaning door 21 is opened, and the first spray head 20 can be cleaned to prevent blockage.

[0026] The second spray member includes a second spray pipe 24 and a second spray head 25, the second spray head 25 is arranged below the second spray pipe 24, and the second spray head 25 is provided in multiple groups, the second spray pipe 24 is connected with the second pipeline 8, and the second cleaning door 26 is arranged on the tower body 1 at a position in front of the second spray pipe 24. The second liquid driving member includes a second circulating pump 27 and a second valve 28, and the second circulating pump 27 and the second valve 28 are arranged on the second pipeline 8. In use, the second valve 28 is opened, and the second circulating pump 27 is started, so that the absorbent in the surge tank 2 flows into the second spray member area through the second pipeline 8, and is sprayed through the second spray pipe 24 and the second spray head 25, and after the absorbent reacts with the harmful substances in the flue gas, the absorbent flows into the surge tank 2 through the collecting hopper 7, and the overflow in the surge tank 2 flows into the slurry pool 5 through the overflow pipe 9. In cleaning, the second cleaning door 26 is opened, and the second spray head 25 can be cleaned to prevent blockage.

[0027] Embodiment two

[0028] According to Figure 1 , 2 , 3, the embodiment provides an energy-saving flue gas purification and dehumidification device, which comprises a tower body 1 and a surge tank 2, a gas inlet 3 is arranged below one side of the tower body 1, a gas outlet 4 is arranged at a middle position of the top of the tower body 1, a slurry pool 5 is arranged at the bottom of the inside of the tower body 1, a first spray member is arranged at a position above the slurry pool 5 in the inside of the tower body 1, the first spray member is located at a position above the gas inlet 3, a first pipeline 6 is connected between the first spray member and the slurry pool 5, a collecting hopper 7 is arranged at a middle end in the inside of the tower body 1, a second spray member is arranged at a position above the collecting hopper 7 in the inside of the tower body 1, a second pipeline 8 is connected between the second spray member and the surge tank 2, a transmission pipe is obliquely connected between the bottom of the collecting hopper 7 and the surge tank 2, and an overflow pipe 9 is connected between a position above one side of the surge tank 2 and the slurry pool 5.

[0029] The first pipeline 6 is provided with a first liquid driving member, the second pipeline 8 is provided with a second liquid driving member, the slurry tank 5 and the pressure stabilizing tank 2 are both provided with absorbents, and the inside of the tower body 1 is provided with a demister 10 and a dehumidifying device 11 from bottom to top. In use, flue gas is discharged from the gas inlet 3 into the tower body 1 and flows upwards into the first spraying member area, the absorbent in the slurry tank 5 flows into the first spraying member area through the first pipeline 6, the absorbent reacts with harmful substances in the flue gas and then flows into the slurry tank 5, the reacted flue gas flows upwards into the second spraying member area, the absorbent in the pressure stabilizing tank 2 flows into the second spraying member area through the second pipeline 8, the absorbent reacts with harmful substances in the flue gas and then flows into the pressure stabilizing tank 2 through the collecting hopper 7, clean gas is discharged after dehumidification and dust removal by the demister 10 and the dehumidifying device 11, and overflow in the pressure stabilizing tank 2 flows into the slurry tank 5 through the overflow pipe 9.

[0030] The middle outer wall of the tower body 1 is inwardly recessed to form a funnel 29, the funnel 29 is arranged between the collecting hopper 7 and the second spraying member, the funnel 29 is used for guiding the absorbent sprayed by the second spraying member to flow into the collecting hopper 7, and the diameter of the opening at the lower end of the funnel 29 is smaller than the diameter of the collecting opening of the collecting hopper 7.

[0031] The outer side of the collecting hopper 7 is fixed with the tower body 1 through a flow guide plate 30, and the flow guide plates 30 are arranged at equal angles around the center of the tower body 1. While fixing the collecting hopper 7, the spacing between the flow guide plates 30 facilitates the flow guide of flue gas and does not affect the flow of flue gas.

[0032] The energy-saving flue gas purification and dehumidification device discharges flue gas from the gas inlet 3 into the tower body 1 and flows upwards into the first spraying member area, the absorbent in the slurry tank 5 flows into the first spraying member area through the first pipeline 6, the absorbent reacts with harmful substances in the flue gas and then flows into the slurry tank 5, the reacted flue gas flows upwards into the second spraying member area, the absorbent in the pressure stabilizing tank 2 flows into the second spraying member area through the second pipeline 8, the absorbent reacts with harmful substances in the flue gas and then flows into the pressure stabilizing tank 2 through the collecting hopper 7, clean gas is discharged after dehumidification and dust removal by the demister 10 and the dehumidifying device 11, and overflow in the pressure stabilizing tank 2 flows into the slurry tank 5 through the overflow pipe 9, in the whole process, the first spraying member and the slurry tank 5 are close to each other, and the second spraying member and the collecting hopper 7 are close to each other, under the premise of maintaining the purification effect, the lift and spraying pressure are maximally reduced, the flue investment and the fan energy consumption are reduced, flue gas cross connection and absorbent cross connection are realized, the flue gas purification efficiency is improved, a single tower body 1 can realize multiple purification, occupies less land, and has low energy consumption. At the same time, when dehumidifying, flue gas enters the outer cylinder 12 from the flue gas passage opening 15, then flows downwards along the outer side of the inner cylinder pipe bundle 13 to the bottom of the outer cylinder 12, then flows upwards into the inner cylinder pipe bundle 13, and is discharged into the atmosphere through the gas outlet 4. Water produced by collision and condensation is collected at the bottom of the outer cylinder 12 and is discharged through the drain pipe 16 for recycling, so as to reduce the water consumption of the system and save water resources.

[0033] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An energy-saving flue gas purification and dehumidification device, comprising a tower body (1) and a pressure stabilizing tank (2), characterized in that: The lower side of the tower body (1) is provided with an air inlet (3), and the middle position of the top of the tower body (1) is provided with an air outlet (4), the bottom of the inside of the tower body (1) is provided with a pulp pool (5), and the inside of the tower body (1) at the upper position of the pulp pool (5) is provided with a first spraying part, the first spraying part is located at the upper position of the air inlet (3), and the first spraying part and the pulp pool (5) are connected with a first pipeline (6), the middle of the inside of the tower body (1) is provided with a collecting hopper (7), and the inside of the tower body (1) at the upper position of the collecting hopper (7) is provided with a second spraying part, the second spraying part and the surge tank (2) are connected with a second pipeline (8), and the bottom of the collecting hopper (7) and the surge tank (2) are obliquely connected with a conveying pipe, the upper side of the surge tank (2) and the pulp pool (5) are connected with an overflow pipe (9). The first pipeline (6) is provided with a first liquid driving part, the second pipeline (8) is provided with a second liquid driving part, the pulp pool (5) and the surge tank (2) are both filled with an absorbent, and the inside of the tower body (1) is sequentially provided with a demister (10) and a dehumidifying device (11) from bottom to top.

2. The energy saving flue gas cleaning and dehumidifying device according to claim 1, characterized in that: The dehumidifying device comprises an outer cylinder (12) and an inner cylinder pipe bundle (13), the top of the inside of the tower body (1) is provided with a support beam (14), the outer cylinder (12) is arranged above the support beam (14), the inner cylinder pipe bundle (13) is arranged on the inner side of the outer cylinder (12), and the upper side of the inner cylinder pipe bundle (13) penetrates through the support beam (14), the upper side of the outer cylinder (12) is provided with a flue gas passage (15) along the circumferential direction of the cylinder, and one side of the bottom of the outer cylinder (12) is provided with a drain pipe (16) extending out of the tower body (1).

3. The energy saving flue gas cleaning and dehumidifying device according to claim 2, characterized in that: The upper side of the support beam (14) is provided with a cover plate (17), the upper end of the inner cylinder pipe bundle (13) penetrates through the cover plate (17), and the outer side of the cover plate (17) and the inner wall of the tower body (1) are provided with a sealing plate (18).

4. The energy saving flue gas cleaning and dehumidifying device according to claim 1, characterized in that: The first spraying part comprises a first spraying pipe (19) and a first spray head (20), the first spray head (20) is arranged below the first spraying pipe (19), and the first spray head (20) is provided with a plurality of groups, the first spraying pipe (19) is connected with the first pipeline (6), and the first spraying pipe (19) is provided with a first cleaning door (21) on the front side of the tower body (1).

5. The energy saving flue gas cleaning and dehumidifying device according to claim 4, characterized in that: The first liquid driving part comprises a first circulating pump (22) and a first valve (23), and the first circulating pump (22) and the first valve (23) are both arranged on the first pipeline (6).

6. The energy saving flue gas cleaning and dehumidifying device according to claim 1, characterized in that: The second spraying part comprises a second spraying pipe (24) and a second spray head (25), the second spray head (25) is arranged below the second spraying pipe (24), and the second spray head (25) is provided with a plurality of groups, the second spraying pipe (24) is connected with the second pipeline (8), and the second spraying pipe (24) is provided with a second cleaning door (26) on the front side of the tower body (1).

7. The energy saving flue gas cleaning and dehumidifying device according to claim 6, characterized in that: The second liquid driving part comprises a second circulating pump (27) and a second valve (28), and the second circulating pump (27) and the second valve (28) are both arranged on the second pipeline (8).

8. The energy saving flue gas cleaning and dehumidifying device according to claim 1, characterized in that: The middle outer wall of the tower body (1) is recessed inward to form a funnel (29), which is arranged between the collecting hopper (7) and the second spraying member, and the outer side of the collecting hopper (7) is fixed with the tower body (1) through a flow guide plate (30), and the flow guide plate (30) is arranged at an equal angle around the center of the tower body (1).

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