High-efficiency ammonia gas absorption device with plate tower structure replacing packing layer

Abstract

The utility model relates to ammonia gas absorption technical field discloses high -efficient ammonia gas absorption device of plate type tower structure replacement padding layer, including padding absorption tower, the outside front side fixed connection of padding absorption tower has waste gas entrance, the outside right side fixed connection of padding absorption tower has the water tank, the outside back fixed connection of water tank has the pump body, the output fixed connection of pump body has the water pipe no.

Description

Technical Field

[0001] This utility model relates to the field of ammonia absorption technology, and in particular to a high-efficiency ammonia absorption device that uses a plate tower structure to replace the packing layer. Background Technology

[0002] This high-efficiency ammonia absorption device, which uses a plate tower structure to replace the packing layer, is suitable for ammonia emission processes in chemical production, such as fertilizer manufacturing, pharmaceuticals, and fine chemicals. It can efficiently treat reaction tail gas. In landfills and sewage treatment plants, it can effectively absorb ammonia odor and improve the surrounding environment. Feed processing plants and livestock farms can also use this device to purify ammonia-containing waste gas, reducing the health hazards of ammonia to workers and the pollution to the atmospheric environment.

[0003] In existing high-efficiency ammonia absorption devices that partially replace packing layers with plate tower structures, ammonia-containing gas rises from the bottom of the tower, while the absorbent is sprayed down from the top, resulting in counter-current gas-liquid contact on the tower plates. Special structures on the tower plates, such as sieves, float valves, or bubble caps, promote gas dispersion into small bubbles that pass through the liquid layer, significantly increasing the gas-liquid contact area and time. Driven by the concentration difference, ammonia rapidly dissolves in the absorbent, undergoing physical absorption or a chemical reaction to achieve ammonia removal.

[0004] However, in practical applications, if the high-efficiency ammonia absorption device that uses a plate tower structure to replace the packing layer cannot prevent backflow of the liquid, it will cause many problems. When the ammonia-containing gas and the absorbent are in a countercurrent mass transfer in the tower, the liquid will flow in the opposite direction due to factors such as airflow fluctuations and pressure changes in the tower, which will disrupt the normal countercurrent contact state between the gas and liquid, resulting in a significant decrease in gas-liquid mass transfer efficiency and a significant reduction in ammonia absorption effect. In response to the above problems, a high-efficiency ammonia absorption device that uses a plate tower structure to replace the packing layer is proposed. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a high-efficiency ammonia absorption device that uses a plate tower structure to replace the packing layer, aiming to improve the problem that some high-efficiency ammonia absorption devices using a plate tower structure to replace the packing layer in the prior art cannot prevent liquid backflow.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-efficiency ammonia absorption device that replaces the packing layer with a plate tower structure includes a packed absorption tower. An exhaust gas inlet is fixedly connected to the front side of the packing absorption tower. A water tank is fixedly connected to the right side of the packing absorption tower. A pump body is fixedly connected to the rear side of the water tank. A water pipe is fixedly connected to the output end of the pump body. An anti-backflow mechanism is connected to the outside of the water pipe. An anti-detachment mechanism is fixedly connected inside the packed absorption tower.

[0008] The anti-backflow mechanism includes an anti-backflow housing, which is fixedly connected to the outside of the water pipe. A cross-shaped placement plate is fixedly connected to the top of the anti-backflow housing, and a mounting housing is fixedly connected to the bottom of the cross-shaped placement plate. A reset spring is provided inside the mounting housing, and a limit plate is slidably connected inside the mounting housing. A sliding rod is fixedly connected to the bottom of the limit plate, and a sealing component is fixedly connected to the bottom of the sliding rod.

[0009] As a further description of the above technical solution:

[0010] The sealing assembly includes a sealing plate, the outer top end of which is fixedly connected to the outer bottom end of the sliding rod, and a sealing ring is fixedly connected to the inner bottom end of the anti-backflow housing. The outer bottom end of the sealing plate is in contact with the outer top end of the sealing ring.

[0011] As a further description of the above technical solution:

[0012] The anti-fall-off mechanism includes a fixing plate, which is fixedly connected to the left and right sides of the inside of the packed absorption tower. A connecting rod is fixedly connected inside the fixing plate. An installation spring is sleeved on the outside of the connecting rod. A demister plate is slidably connected to the outside of the connecting rod. A connecting plate is fixedly connected to the bottom of the connecting rod.

[0013] As a further description of the above technical solution:

[0014] The top of the packed absorption tower is fixedly connected to a through-hole plate, the bottom of the packed absorption tower is fixedly connected to a packing support frame, and the top of the packing support frame is fixedly connected to the packing body.

[0015] As a further description of the above technical solution:

[0016] The top of the water tank is rotatably connected to a water inlet, and the outer right side of the packing absorption tower is fixedly connected to a maintenance door.

[0017] As a further description of the above technical solution:

[0018] The exhaust gas inlet has an internal cavity, and the outside of the cavity is in contact with the outside of the packing body.

[0019] As a further description of the above technical solution:

[0020] The sealing plate is slidably connected to the outside of the anti-backflow housing, the sliding rod is slidably connected to the outside of the anti-backflow housing, and a water spray pipe is fixedly connected to the top of the anti-backflow housing;

[0021] As a further description of the above technical solution:

[0022] One end of the reset spring is fixedly connected to the inside of the mounting housing, and the other end of the reset spring is fixedly connected to the outside of the limiting plate.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, after the pump body is started, the water flow pushes the sealing plate to compress the reset spring, forming a passage for water to flow into the spray pipe for spraying; when the pump body stops, the spring rebounds and drives the sealing plate to adhere to the sealing ring, blocking backflow. This design utilizes water flow pressure and spring force to automatically control the on / off state, eliminating the need for manual operation. It ensures the continuity of water spraying operations in the packed absorber tower and effectively prevents water backflow from causing equipment damage, thereby improving system reliability and operating efficiency.

[0025] 2. In this utility model, when exhaust gas is discharged, the demister plate is impacted and squeezed by the airflow, causing it to slide and buffer on the connecting rod. The elastic force generated by the spring deformation limits its sliding range, preventing it from falling off. This design utilizes the elasticity of the spring to buffer the impact force of the airflow, allowing the demister plate to slide slightly with the airflow to relieve the force while being limited and fixed by the connecting rod. This effectively prevents the demister plate from falling off due to airflow impact, ensuring the operational stability and safety of the exhaust gas treatment equipment. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of the high-efficiency ammonia absorption device that uses a plate tower structure to replace the packing layer, as proposed in this utility model.

[0027] Figure 2 This is a schematic diagram of the waste gas inlet of the high-efficiency ammonia absorption device that uses a plate tower structure to replace the packing layer, as proposed in this utility model.

[0028] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 This is a schematic diagram of the water tank structure of the high-efficiency ammonia absorption device that uses a plate tower structure to replace the packing layer, as proposed in this utility model.

[0030] Figure 5 for Figure 4 Enlarged view of section B in the middle.

[0031] Legend:

[0032] 1. Packed absorption tower; 2. Exhaust gas inlet; 3. Water tank; 4. Pump body; 5. Water pipe 1; 6. Anti-backflow shell; 7. Cross placement plate; 8. Mounting shell; 9. Return spring; 10. Limiting plate; 11. Sliding rod; 12. Sealing plate; 13. Sealing ring; 14. Water spray pipe; 15. Water inlet; 16. Maintenance door; 17. Cavity; 18. Through-hole plate; 19. Packing body; 20. Packing support frame; 21. Fixing plate; 22. Connecting rod; 23. Connecting plate; 24. Mounting spring; 25. Demisting plate. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figures 1 to 3 This utility model provides an embodiment of a high-efficiency ammonia absorption device that uses a plate tower structure to replace the packing layer. It includes a packed absorption tower 1, the interior of which provides space for the gas-liquid mass transfer reaction between ammonia and the absorbent liquid. The reasonable design of its height and diameter ensures sufficient contact time and space between the gas and liquid phases, thereby achieving efficient ammonia absorption. An exhaust gas inlet 2 is fixedly connected to the front exterior of the packed absorption tower 1. The exhaust gas inlet 2 is responsible for introducing industrial waste gas containing ammonia into the tower. Its position and direction must ensure that the waste gas is evenly distributed across the entire tower cross-section, avoiding short-circuiting or dead zones, and ensuring efficient absorption of ammonia. The gas and absorbent are in full contact to improve the ammonia absorption efficiency. A water tank 3 is fixedly connected to the right side of the packed absorption tower 1 to facilitate the storage, circulation and replenishment of the absorbent. The water tank 3 is tightly connected to the tower body to ensure that the absorbent can be stably supplied to the tower. It also facilitates the centralized management and monitoring of the absorbent. A pump body 4 is fixedly connected to the rear side of the water tank 3. The working principle of the pump body 4 is to drive the impeller to rotate by the motor, draw the absorbent in the water tank 3 into the pump body, pressurize it and deliver it into the tower to realize the recycling of the absorbent and ensure that there is always enough absorbent in the tower to contact and react with the ammonia in the waste gas.

[0035] A water pipe 5 is fixedly connected to the output end of pump body 4. Water pipe 5 is responsible for transporting the absorbent from pump body 4 to the spray device or distributor inside the tower, ensuring that the absorbent can be evenly distributed on the packing or plate tower structure inside the tower. An anti-backflow mechanism is externally connected to water pipe 5. An anti-detachment mechanism is fixedly connected internally to the packed absorption tower 1. The anti-detachment mechanism includes a fixing plate 21. The shape and size of the fixing plate 21 match the internal structure of the tower. Its installation position and method must ensure that it can withstand the force generated by the gas-liquid flow inside the tower, providing a stable installation foundation for the connecting rod 22 and other components. The fixing plate 21 is externally fixedly connected to the left and right sides inside the packed absorption tower 1. The connecting rod 22 is fixedly connected internally to the fixing plate 21. 2. Extending upwards, it provides connection and support for the demister plate 25 and other components, ensuring the stability of the entire anti-fall mechanism in the vertical direction within the tower. The connecting rod 22 is fitted with a mounting spring 24, which can effectively absorb and alleviate these forces, preventing damage or detachment of components due to excessive vibration or displacement. It also helps to ensure the sealing and contact effect between the demister plate 25 and other components within the tower. The connecting rod 22 is slidably connected to the demister plate 25. The surface structure of the demister plate 25 can effectively capture and separate droplets and mist in the exhaust gas, reducing the droplet content at the exhaust gas outlet and reducing the loss of absorbent liquid. It also helps to improve the purification quality of the exhaust gas. The bottom of the connecting rod 22 is fixedly connected to a connecting plate 23.

[0036] The anti-backflow mechanism includes an anti-backflow housing 6. The anti-backflow housing 6 has a reasonable shape and size design, with sufficient internal space to accommodate other internal components. Its internal surface is smooth to reduce resistance to liquid flow and the generation of eddies. The anti-backflow housing 6 is externally fixedly connected to the outside of the water pipe 5. A cross-shaped placement plate 7 is fixedly connected to the top of the inside of the anti-backflow housing 6. The cross-shaped placement plate 7 is designed in a cross shape to minimize the occupation of internal space while ensuring sufficient support strength, allowing the liquid to flow smoothly. A mounting housing 8 is fixedly connected to the bottom of the cross-shaped placement plate 7. The mounting housing 8 is usually a cylindrical cavity structure made of the same or similar material as the anti-backflow housing 6.

[0037] An internal reset spring 9 is installed in the mounting housing 8. The main function of the reset spring 9 is to be compressed when the liquid is flowing in the forward direction. When the liquid flow stops or a backflow tendency occurs, the reset spring 9 can quickly extend, pushing the limiting plate 10 and the sealing assembly downwards to achieve a sealing function and prevent liquid backflow. The limiting plate 10 is slidably connected inside the mounting housing 8. The main function of the limiting plate 10 is to limit the extension and contraction range of the reset spring 9, preventing the spring from shifting or deforming during compression and extension. It also provides connection and support for the sliding rod 11, ensuring that the sliding rod 11 can slide stably up and down. The sliding rod 11 is fixedly connected to the outer bottom end of the limiting plate 10. The main function of the sliding rod 11 is to connect the limiting plate 10 and the sealing assembly together and guide the sealing assembly to slide up and down within the anti-backflow housing 6. The bottom of the sliding rod 11 is fixed. A sealing assembly is connected, including a sealing plate 12. The main function of the sealing plate 12 is to be pushed upward by the liquid pressure when the liquid is flowing in the forward direction, allowing the liquid to pass smoothly. When the liquid flow stops or there is a tendency for backflow, the return spring 9 pushes the limiting plate 10 and the sliding rod 11 to move downward, so that the sealing plate 12 is tightly attached to the sealing ring 13, forming an effective seal and preventing liquid backflow. The outer top end of the sealing plate 12 is fixedly connected to the outer bottom end of the sliding rod 11. The inner bottom end of the anti-backflow housing 6 is fixedly connected to the sealing ring 13. The main function of the sealing ring 13 is to cooperate with the sealing plate 12 to form a sealing surface. The surface of the sealing ring 13 is finely processed and has high flatness and smoothness to ensure the sealing effect between it and the sealing plate 12. The outer bottom end of the sealing plate 12 is attached to the outer top end of the sealing ring 13.

[0038] Reference Figures 3 to 5The top of the packed absorption tower 1 is fixedly connected to a perforated plate 18, which evenly distributes the gas and liquid entering the tower, preventing gas flow deviation and uneven liquid distribution, ensuring sufficient contact between the waste gas and the absorbent liquid, and improving mass transfer efficiency. The bottom of the packed absorption tower 1 is fixedly connected to a packing support frame 20, located at the bottom of the tower body. Its main function is to support the packing body 19, preventing the packing from sinking or shifting, ensuring stable stacking of the packing within the tower, and providing a stable environment for gas-liquid mass transfer. The top of the packing support frame 20 is fixedly connected to the packing body 19, filling the tower and providing a large surface area for sufficient contact and mass transfer between the gas and liquid phases, allowing ammonia in the waste gas to be effectively absorbed by the absorbent liquid, thereby improving ammonia absorption efficiency. The top of the water tank 3 is rotatably connected to a water inlet 15. A maintenance door 16 is fixedly connected to the right side of the packed absorption tower 1 for easy operation. Personnel enter the tower to inspect, maintain, and repair the equipment, such as cleaning the packing, inspecting internal components, and replacing damaged parts, to ensure the normal operation and service life of the equipment. The exhaust gas inlet 2 has a cavity 17 inside, and the outside of the cavity 17 is in contact with the outside of the packing body 19. The outside of the sealing plate 12 is slidably connected to the inside of the anti-backflow shell 6, and the outside of the sliding rod 11 is slidably connected to the inside of the anti-backflow shell 6. The top of the anti-backflow shell 6 is fixedly connected to a water spray pipe 14, the main function of which is to transport the absorbent liquid from the water tank 3 and pressurized by the pump body 4 into the tower, and to make the absorbent liquid evenly distributed on the surface of the packing by spraying, forming a liquid film or droplets, which fully contact the rising exhaust gas and improve the absorption efficiency of ammonia. One end of the return spring 9 is fixedly connected to the inside of the mounting shell 8, and the other end of the return spring 9 is fixedly connected to the outside of the limit plate 10.

[0039] Working principle: By starting the pump body 4, the pump body 4 draws water from the inside of the water tank 3 into the anti-backflow housing 6 through the water pipe 5. This water flow then squeezes the sealing plate 12, causing the sealing plate 12 to slide the sliding rod 11 inside the mounting housing 8. This causes the limiting plate 10 to squeeze the return spring 9, causing the return spring 9 to deform. At this moment, the water flow can flow into the spray pipe 14 through the cross placement plate 7, and then spray water into the inside of the packed absorption tower 1. When the pump body 4 stops running, the return spring 9 rebounds, allowing the sealing plate 12 to fit with the sealing ring 13, thus preventing the water flow from flowing back into the water tank 3 through the spray pipe 14.

[0040] When preventing the demister plate 25 from falling off, exhaust gas is discharged outwards, causing the demister plate 25 to apply pressure to the mounting spring 24, causing the mounting spring 24 to deform under pressure. This allows the demister plate 25 to slide outside the connecting rod 22, thus preventing it from falling off and achieving the goal of preventing the demister plate 25 from falling off.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency ammonia absorption device that uses a plate tower structure to replace the packing layer, comprising a packed absorption tower (1), characterized in that: The packing absorption tower (1) is fixedly connected to the front of the outside of the exhaust gas inlet (2), the packing absorption tower (1) is fixedly connected to the right side of the outside of the outside of the water tank (3), the water tank (3) is fixedly connected to the rear side of the outside of the water tank (3), the output end of the pump body (4) is fixedly connected to the water pipe (5), the water pipe (5) is connected to the outside of the water pipe (5), and the packing absorption tower (1) is fixedly connected to the inside of the packing absorption tower (1). The anti-backflow mechanism includes an anti-backflow housing (6), the outside of which is fixedly connected to the outside of the water pipe (5). A cross-shaped placement plate (7) is fixedly connected to the top of the inside of the anti-backflow housing (6). An installation housing (8) is fixedly connected to the bottom of the cross-shaped placement plate (7). A reset spring (9) is provided inside the installation housing (8). A limit plate (10) is slidably connected inside the installation housing (8). A sliding rod (11) is fixedly connected to the bottom of the outside of the limit plate (10). A sealing component is fixedly connected to the bottom of the sliding rod (11).

2. The high-efficiency ammonia absorption device that replaces the packing layer with a plate tower structure according to claim 1, characterized in that: The sealing assembly includes a sealing plate (12), the outer top end of which is fixedly connected to the outer bottom end of the sliding rod (11), and a sealing ring (13) is fixedly connected to the inner bottom end of the anti-backflow housing (6). The outer bottom end of the sealing plate (12) is in contact with the outer top end of the sealing ring (13).

3. The high-efficiency ammonia absorption device that replaces the packing layer with a plate tower structure according to claim 1, characterized in that: The anti-fall-off mechanism includes a fixing plate (21), which is fixedly connected to the left and right sides of the inside of the packed absorption tower (1). A connecting rod (22) is fixedly connected inside the fixing plate (21). A mounting spring (24) is sleeved on the outside of the connecting rod (22). A demister plate (25) is slidably connected to the outside of the connecting rod (22). A connecting plate (23) is fixedly connected to the bottom of the connecting rod (22).

4. The high-efficiency ammonia absorption device that replaces the packing layer with a plate tower structure according to claim 1, characterized in that: The top of the packed absorption tower (1) is fixedly connected to a through-hole plate (18), the bottom of the packed absorption tower (1) is fixedly connected to a packing support frame (20), and the top of the packing support frame (20) is fixedly connected to a packing body (19).

5. The high-efficiency ammonia absorption device that replaces the packing layer with a plate tower structure according to claim 4, characterized in that: The top of the water tank (3) is rotatably connected to a water inlet (15), and the outer right side of the packing absorption tower (1) is fixedly connected to a maintenance door (16).

6. The high-efficiency ammonia absorption device that replaces the packing layer with a plate tower structure according to claim 5, characterized in that: The exhaust gas inlet (2) is provided with a cavity (17), and the outside of the cavity (17) is in contact with the outside of the packing body (19).

7. The high-efficiency ammonia absorption device that replaces the packing layer with a plate tower structure according to claim 2, characterized in that: The sealing plate (12) is slidably connected to the outside of the anti-backflow housing (6) and the sliding rod (11) is slidably connected to the outside of the anti-backflow housing (6). A water spray pipe (14) is fixedly connected to the top of the anti-backflow housing (6).

8. The high-efficiency ammonia absorption device that replaces the packing layer with a plate tower structure according to claim 4, characterized in that: One end of the reset spring (9) is fixedly connected to the inside of the mounting housing (8), and the other end of the reset spring (9) is fixedly connected to the outside of the limiting plate (10).

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