Ammonia water volatile gas absorption device

Abstract

The utility model provides a kind of ammonia volatile gas absorption device, belong to ammonia recovery processing technical field, comprising: ammonia water storage tank, water seal absorption tank and spray absorption tower connected in order along ammonia gas flow direction;Gas outlet is provided at the top of spray absorption tower, gas outlet is connected with exhaust gas unit and the gas inlet of spray absorption tower respectively by pipeline;The liquid phase pipe of water seal absorption tank is connected with the liquid return port of ammonia water storage tank by liquid outlet pump, and the liquid outlet of spray absorption tower is connected with the liquid return port of ammonia water storage tank by discharge pump;The liquid phase pipe of water seal absorption tank and the water supplement port of spray absorption tower are also connected with the outlet of water supplement pump respectively by pipeline, and the inlet of water supplement pump is connected with pure water pipe network;The liquid phase pipe of water seal absorption tank is connected with liquid outlet pump and water supplement pump respectively by tee joint conversion valve.The device is timely and fully absorbed to ammonia volatile gas by the absorption mode of continuous water seal and spraying, absorption effect is good, avoid resource waste, improve resource utilization.

Description

Technical Field

[0001] This utility model relates to the field of ammonia recovery and treatment technology, and in particular to an ammonia volatilization gas absorption device. Background Technology

[0002] In the ammonia electrolysis process for zinc production, ammonia is a crucial raw material. Ammonia acts as a reacting agent with zinc oxide to form a zinc-ammonia complex for subsequent electrowinning. The main reaction equation is as follows: ZnO + 2NH3·H2O → Zn(NH3)2(OH)2 + H2O. In the electrowinning circulating mixing tank, the zinc-ammonia complex solution, a portion of the lean electrowinning solution, additives, and ammonia are mixed and continuously pumped into the electrowinning tank from the inlet. The lean electrowinning solution flows into the circulating tank through a chute at the outlet, and the cycle continues. Using graphite as the anode and aluminum alloy as the cathode, metallic zinc is deposited on the cathode when direct current is applied. It is evident that ammonia is used in multiple stages of the production process. Generally, the principle of the high solubility of gaseous ammonia in water is utilized, and a certain concentration of ammonia is produced by absorbing gaseous ammonia through water circulation. However, due to the highly volatile nature of ammonia, it readily volatilizes during the ammonia water production process, especially when the ammonia water reaches a certain concentration or when pressure and temperature increase. To ensure the stability and safety of the ammonia water production process, it is necessary to treat the large amount of ammonia gas in the ammonia water storage tank. If not absorbed in time, the leaked ammonia gas will form ammonia mist, which is heavier than air and will remain on the ground, causing harm to on-site workers. It not only pollutes the environment but also poses safety hazards. It may mix with air to form an explosive mixture, which is prone to combustion and explosion when exposed to open flames or high heat. Furthermore, it wastes raw materials, increases production costs, and causes certain economic losses to the enterprise.

[0003] Currently, the common method for absorbing volatile ammonia gas in ammonia storage areas is to connect the overflow pipe of the ammonia storage tank to a wastewater pond. The volatile ammonia gas flows through the overflow pipe into the wastewater pond and is absorbed by the water there. This method requires a wastewater pond and its associated wastewater pumps, resulting in a large footprint, increased investment costs, and the wastewater ponds are generally not perfectly sealed, leading to the continued generation of ammonia odor in the ammonia area. Furthermore, the waste ammonia water from the wastewater pond is typically pumped to the plant's wastewater treatment system, resulting in waste of ammonia. Therefore, how to efficiently absorb volatile ammonia gas, reduce environmental pollution, and conserve production resources and costs has become an urgent problem to be solved. Utility Model Content

[0004] This utility model provides an ammonia volatilization gas absorption device to solve the problems of poor volatilization gas absorption effect, untimely and insufficient recovery, pollution of the production environment, increased production safety hazards, and increased production costs due to waste of volatilization gas in existing ammonia storage tanks.

[0005] This utility model provides an ammonia volatilization gas absorption device, comprising: an ammonia storage tank, a water-sealed absorption tank, and a spray absorption tower; the ammonia outlet of the ammonia storage tank is connected to the inlet of the water-sealed absorption tank via a pipeline, the outlet of the water-sealed absorption tank is connected to the gas inlet of the spray absorption tower, a gas outlet is provided at the top of the spray absorption tower, an ammonia detector is installed at the gas outlet, and the gas outlet is connected to the waste gas unit and the gas inlet of the spray absorption tower via pipelines respectively; the liquid phase pipe of the water-sealed absorption tank is connected to the return port of the ammonia storage tank via a liquid discharge pump, and the liquid outlet of the spray absorption tower is connected to the return port of the ammonia storage tank via a discharge pump; the liquid phase pipe of the water-sealed absorption tank and the water supply port of the spray absorption tower are also connected to the outlet of the water supply pump via pipelines, and the inlet of the water supply pump is connected to the pure water network; the liquid phase pipe of the water-sealed absorption tank is connected to the liquid discharge pump and the water supply pump respectively via a three-way switching valve.

[0006] Furthermore, both the water-sealed absorption tank and the spray absorption tower are equipped with online ammonia concentration detectors and level gauges.

[0007] Furthermore, the online ammonia concentration detector is electrically connected to the controller, and both the liquid discharge pump and the feed pump are electrically connected to the controller.

[0008] Furthermore, the liquid discharge pump and the feed pump are interlocked with the level gauge and the water replenishment pump via the controller; the three-way switching valve is also electrically connected to the controller.

[0009] Furthermore, the upper part of the spray absorption tower is equipped with at least one spray pipe, and the spray pipe is equipped with multiple spray heads evenly distributed on it; the spray pipe is connected to the circulating liquid outlet at the bottom of the spray absorption tower through a circulating pump.

[0010] Furthermore, the gas inlet of the spray absorption tower is connected to an inlet pipe, which is located inside the spray absorption tower; the inlet pipe extends to the bottom of the spray absorption tower, and the other end is not sealed; multiple air outlets are evenly distributed on the inlet pipe; the circulating liquid outlet is positioned at a height higher than the uppermost air outlet of the inlet pipe.

[0011] Furthermore, the water seal absorption tank includes a tank body and an inner cylinder; the inner cylinder is a hollow structure, coaxially and longitudinally arranged in the center of the tank body; gaps are left between the top and bottom ends of the inner cylinder and the tank body; an annular first partition is provided between the outer wall of the inner cylinder and the inner wall of the tank body, the first partition divides the tank body into an upper chamber and a lower chamber; an annular second partition is provided in the lower chamber, the second partition is vertically fixed to the inner bottom surface of the tank body, and the top end of the second partition is higher than the bottom end of the inner cylinder and located on the outside of the inner cylinder.

[0012] Furthermore, the air inlet is located in the lower part of the upper chamber of the tank and is positioned at a height lower than the top of the inner cylinder; the air outlet is located in the lower part of the lower chamber of the tank and is positioned at a height lower than the top of the second partition; both the upper and lower chambers are provided with liquid phase ports at their lower parts, the two liquid phase ports are located on the same side and are respectively connected to the liquid phase pipe through pipes.

[0013] Furthermore, the air inlet is connected to an air distribution pipe, which has a ring structure and is located between the inner cylinder and the tank body; multiple air outlets are evenly distributed on the air distribution pipe.

[0014] The ammonia volatile gas absorption device provided by this utility model uses a water-sealed absorption tank and a spray absorption tower in combination to absorb the volatile gas generated by ammonia water through water-sealing and spray absorption in sequence. The absorption liquid is promptly returned to the ammonia water storage tank for reuse. It has good absorption effect and high absorption efficiency, reduces the waste of ammonia gas and its pollution to the environment and safety hazards in production, eliminates the ammonia smell in the ammonia area, improves resource utilization, and saves production costs.

[0015] The water-sealed absorption tank in this device allows ammonia gas to be absorbed once by the liquid layer in the upper chamber through the gas distribution pipe. After bubbling and overflowing, it is absorbed a second time by the liquid layer in the lower chamber. This two-stage water-sealed absorption, with a relatively long flow path, prolongs the flow and residence time of the ammonia gas in the water-sealed absorption tank, thereby improving the absorption efficiency. The spray absorption tower, through the gas inlet pipe, allows ammonia gas to be preferentially absorbed once in the absorbent liquid at the bottom of the tower, and then absorbed a second time by spraying, further improving the absorption efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the ammonia volatilization gas absorption device provided in one embodiment of this utility model; Figure 2 This is a schematic diagram of the structure of a spray absorption tower provided in one embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a water seal absorption tank provided in one embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Ammonia storage tank; 2. Water seal absorption tank; 3. Spray absorption tower; 4. Ammonia detector; 5. Liquid discharge pump; 6. Feed pump; 7. Make-up water pump; 8. Online ammonia concentration detector; 21. Gas inlet; 22. Gas outlet; 23. Liquid phase pipe; 24. Three-way switching valve; 25. Tank body; 26. Inner cylinder; 27. First baffle; 28. Second baffle; 29. ​​Liquid phase port; 31. Gas inlet; 32. Gas outlet; 33. Make-up water port; 34. Spray pipe; 35. Circulation pump; 36. Circulating liquid outlet; 37. Gas inlet pipe; 211. Gas distribution pipe. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are also within the protection scope of this utility model.

[0020] like Figures 1-3 This utility model discloses an ammonia volatilization gas absorption device, comprising: an ammonia storage tank 1, a water-sealed absorption tank 2, and a spray absorption tower 3; the ammonia outlet of the ammonia storage tank 1 is connected to the inlet 21 of the water-sealed absorption tank 2 via a pipeline, the outlet 22 of the water-sealed absorption tank 2 is connected to the gas inlet 31 of the spray absorption tower 3, a gas outlet 32 ​​is provided at the top of the spray absorption tower 3, an ammonia detector 4 is provided at the gas outlet 32, and the gas outlet 32 ​​is connected to the exhaust gas unit and the gas inlet of the spray absorption tower 3 via pipelines respectively. The inlet 31 of the water seal absorption tank 2 is connected; the liquid phase pipe 23 of the water seal absorption tank 2 is connected to the return port of the ammonia storage tank 1 through the liquid outlet pump 5, and the liquid outlet of the spray absorption tower 3 is connected to the return port of the ammonia storage tank 1 through the discharge pump 6; the liquid phase pipe 23 of the water seal absorption tank 2 and the water supply port 33 of the spray absorption tower 3 are also connected to the outlet of the water supply pump 7 through pipes, and the inlet of the water supply pump 7 is connected to the pure water pipeline network; the liquid phase pipe 23 of the water seal absorption tank 2 is connected to the liquid outlet pump 5 and the water supply pump 7 through the three-way switching valve 24.

[0021] The prepared ammonia solution is usually temporarily stored in ammonia storage tank 1. The volatile ammonia gas enters the water-sealed absorption tank 2 through the ammonia outlet of ammonia storage tank 1. After water-sealed absorption, the ammonia gas enters the spray absorption tower 3 for spray absorption. The gas discharged from the gas outlet 32 ​​of the spray absorption tower 3 is detected by an ammonia detector 4. If the ammonia concentration is lower than the preset value (set by technicians according to production conditions), it is discharged to the waste gas unit for purification treatment. If it is higher than the preset value, it is discharged back to the spray absorption tower 3 for reabsorption to avoid ammonia waste. Both the water-sealed absorption tank 2 and the spray absorption tower 3 use pure water to absorb ammonia. After the absorbent-ammonia solution reaches a certain concentration (set by technicians according to production conditions), it is sent back to the ammonia storage tank 1 for reuse through the liquid return port via the liquid discharge pump 5 and the material discharge pump 6, respectively. The water supply pump 7 replenishes the absorption water to the water-sealed absorption tank 2 and the spray absorption tower 3. The device absorbs the volatile gases generated by ammonia water through water seal absorption and spray absorption. The absorbent is then returned to the ammonia water storage tank 1 for reuse. This continuous cycle of absorption effectively absorbs and utilizes the ammonia gas volatilized during the ammonia water preparation process. The absorption effect is excellent, reducing ammonia waste, environmental pollution, and safety hazards in production. It also eliminates the ammonia odor in the ammonia area, improves resource utilization, and saves production costs.

[0022] In one embodiment, both the water-sealed absorption tank 2 and the spray absorption tower 3 are equipped with an online ammonia concentration detector 8 and a level gauge. The online ammonia concentration detector 8 facilitates real-time monitoring of the absorbent concentration in the water-sealed absorption tank 2 and the spray absorption tower 3. The level gauge is used to collect the level of the absorbent in the water-sealed absorption tank 2 and the spray absorption tower 3, facilitating timely water replenishment and other operations.

[0023] In one embodiment, the online ammonia concentration detector 8 is electrically connected to the controller, and both the liquid discharge pump 5 and the feed pump 6 are electrically connected to the controller. The detection data from the online ammonia concentration detector 8 can also be transmitted to the controller via electrical signals. The controller analyzes the data and compares it with preset values. If the emission concentration threshold (set by technicians based on production conditions) is reached, the liquid discharge pump 5 and the feed pump 6 are activated to promptly return the absorbent to the ammonia storage tank 1, preventing a high ammonia concentration in the absorbent and thus reducing the absorption effect. The controller and its control system are existing technologies, and their related electrical connections are conventional and will not be described in detail here.

[0024] In one embodiment, the liquid discharge pump 5 and the feed pump 6 are interlocked with the level gauge and the water replenishment pump 7 via a controller; the three-way switching valve 24 is also electrically connected to the controller. After the liquid discharge from the liquid discharge pump 5 and the feed pump 6, the water replenishment pump 7 replenishes water in a timely manner to prevent the liquid level in the water-sealed absorption tank 2 and the spray absorption tower 3 from being too low and reducing the absorption effect. The controller can automatically control the three-way switching valve 24 according to the start and stop of the liquid discharge pump 5 and the water replenishment pump 7, so that the liquid phase pipe 23 of the water-sealed absorption tank 2 can automatically switch between the discharge mode and the inlet mode. When the liquid discharge pump 5 starts, it draws out the absorbent from the water-sealed absorption tank 2 through the liquid phase pipe 23. When the water replenishment pump 7 starts, it replenishes the water-sealed absorption tank 2 with pure water for absorbing ammonia through the liquid phase pipe 23.

[0025] like Figure 2 In one embodiment, at least one spray pipe 34 is provided at the upper part of the spray absorption tower 3, and multiple spray heads are evenly distributed on the spray pipe 34. The spray pipe 34 is connected to the circulating liquid outlet 36 at the bottom of the spray absorption tower 3 via a circulating pump 35. The spray pipe 34 and its spray heads can effectively capture and absorb ammonia gas within the ammonia escape height space (i.e., inside the spray absorption tower 3). The number of spray pipes 34 can be determined according to the tower height; for example, multiple spray pipes 34 can be axially distributed at different heights to reduce possible ammonia escape and improve the absorption rate. The number of spray pipes 34 and spray heads is determined by technicians based on production conditions, and their structures are conventional in the art, and will not be described in detail or limited here.

[0026] In one embodiment, the gas inlet 31 of the spray absorption tower 3 is connected to an inlet pipe 37, which is located inside the spray absorption tower 3. The inlet pipe 37 extends to the bottom of the spray absorption tower 3, and its other end is not sealed. Multiple outlet holes are evenly distributed on the inlet pipe 37. The circulating liquid outlet 36 is positioned higher than the uppermost outlet hole of the inlet pipe 37. After ammonia enters the inlet pipe 37, it first enters the absorbent liquid stored at the bottom of the tower and is preferentially absorbed once. After the ammonia bubbles and overflows from the absorbent liquid, it flows upward along the tower body and comes into contact with the absorbent liquid sprayed down by the circulating pump 35 to the spray pipe 34, where it is absorbed again. The ammonia undergoes two absorptions in the spray absorption tower 3, reducing ammonia escape and further improving the absorption efficiency, so that the ammonia absorption efficiency of the entire device can reach more than 99.9% during operation.

[0027] like Figure 3In one embodiment, the water seal absorption tank 2 includes a tank body 25 and an inner cylinder 26; the inner cylinder 26 is a hollow structure and is coaxially and longitudinally arranged in the center of the tank body 25; there are gaps between the top and bottom ends of the inner cylinder 26 and the tank body 25; an annular first partition 27 is provided between the outer wall of the inner cylinder 26 and the inner wall of the tank body 25, the first partition 27 divides the tank body 25 into an upper chamber and a lower chamber; an annular second partition 28 is provided in the lower chamber, the second partition 28 is vertically fixed to the inner bottom surface of the tank body 25, and the top end of the second partition 28 is higher than the bottom end of the inner cylinder 26 and located outside the inner cylinder 26.

[0028] In one embodiment, the air inlet 21 is located in the lower part of the upper chamber of the tank body 25 and is positioned at a height lower than the top of the inner cylinder 26; the air outlet 22 is located in the lower part of the lower chamber of the tank body 25 and is positioned at a height lower than the top of the second partition 28; both the upper and lower chambers are provided with liquid phase ports 29, which are located on the same side and are respectively connected to the liquid phase pipe 23 through pipes.

[0029] In one embodiment, the air inlet 21 is connected to an air distribution pipe 211, which is an annular structure and is disposed between the inner cylinder 26 and the tank body 25; multiple air outlets are evenly distributed on the air distribution pipe 211.

[0030] Pure water for ammonia absorption is injected into the upper and lower chambers through the liquid phase pipe 23 and two liquid phase ports 29, forming two liquid layers in the upper and lower chambers. Ammonia is then introduced into the gas distribution pipe 211 through the gas inlet 21. The ammonia enters the liquid layer in the upper chamber through the gas outlet on the gas distribution pipe 211 and is absorbed once. After bubbling and overflowing, it enters the liquid layer in the lower chamber through the inner cylinder 26 and is absorbed a second time. After overflowing again, it is discharged through the gas outlet 22 located at the bottom of the tank body 25. The ammonia undergoes two stages of water seal absorption in the upper and lower chambers, and the flow path is relatively long, which prolongs its flow and residence time in the water seal absorption tank 2, thereby improving the absorption effect of ammonia. The gas distribution pipe 211 can be set with multiple turns to increase the contact area between the ammonia and the liquid layer.

[0031] It should be noted that arrows without reference numerals indicate the flow direction of gas-liquid mixtures, gas phases, or liquid phases.

[0032] In the aforementioned ammonia vapor absorption device, during operation, the ammonia vapor from the ammonia storage tank 1 first enters the water-sealed absorption tank 2 through the ammonia outlet. The water-sealed absorption tank 2 is pre-filled with pure water for ammonia absorption through a water pump 7, a liquid phase pipe 23, and two liquid phase ports 29, forming two liquid layers in the upper and lower chambers. Ammonia is then introduced into the gas distribution pipe 211 through the gas inlet 21. The ammonia enters the liquid layer in the upper chamber through the gas outlet on the gas distribution pipe 211 and is absorbed once. After bubbling and overflowing, it enters the liquid layer in the lower chamber through the inner cylinder 26 and is absorbed a second time. After overflowing again, it is discharged through the gas outlet 22 located at the bottom of the tank body 25.

[0033] In the spray absorption tower 3, pure water is injected into it in advance by the water replenishment pump 7 to form an absorbent liquid layer. After the ammonia gas is absorbed by the water seal, it enters the inlet pipe 37 and is first absorbed once in the absorbent liquid stored at the bottom of the tower. After the ammonia gas bubbles and overflows the absorbent liquid, it flows upward along the tower body and comes into contact with the absorbent liquid sprayed down from the spray pipe 34 by the circulation pump 35 and is absorbed again. The gas discharged from the gas outlet 32 ​​of the spray absorption tower 3 is detected by the ammonia gas detector 4. If the ammonia gas concentration is lower than the preset value, it is discharged to the waste gas unit for purification treatment. If it is higher than the preset value, it is discharged back to the spray absorption tower 3 for reabsorption to avoid ammonia gas waste.

[0034] The detection data from the online ammonia concentration detector 8 is transmitted to the controller. The controller analyzes the data and compares it with the preset value. If the concentration threshold for discharge is reached, the discharge pump 5 and the feed pump 6 are activated to promptly return the absorbent liquid to the ammonia storage tank 1 via the return port for reuse. The water supply pump 7 replenishes the absorption water to the water-sealed absorption tank 2 and the spray absorption tower 3. It is important to note that the controller can automatically control the three-way switching valve 24 based on the start and stop of the discharge pump 5 and the water supply pump 7. This allows the liquid phase pipe 23 of the water-sealed absorption tank 2 to automatically switch between discharge and inlet modes. When the discharge pump 5 starts, it extracts the absorbent liquid from the water-sealed absorption tank 2 through the liquid phase pipe 23. When the water supply pump 7 starts, it replenishes the water-sealed absorption tank 2 with pure water for ammonia absorption through the liquid phase pipe 23.

[0035] It should be noted that the detailed structure of some devices in this utility model is not described in detail, but belongs to the prior art known to those skilled in the art, and therefore will not be described again here. In addition, the parts of this device not described are the same as or can be implemented using existing technology.

[0036] It should be noted that those skilled in the art can make some modifications to the above-mentioned device under the guidance of this utility model. For example, the equipment inside the device is also equipped with a level gauge, an overflow / nitrogen pipeline, etc.; pumps, pressure sensors, flow meters or temperature sensors are installed on the conveying pipeline inside the device in different units or devices, and different valves, such as pressure relief valves, pressure regulating valves, safety valves, pneumatic valves, etc., are also installed to regulate and stabilize the pressure of the entire device, and the opening degree of the valves can also be adjusted to regulate the flow rate of materials in the pipeline, etc.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An ammonia vapor absorption device, characterized in that, include: The system comprises an ammonia storage tank, a water-sealed absorption tank, and a spray absorption tower. The ammonia outlet of the ammonia storage tank is connected to the inlet of the water-sealed absorption tank via a pipeline. The outlet of the water-sealed absorption tank is connected to the gas inlet of the spray absorption tower. A gas outlet is located at the top of the spray absorption tower, and an ammonia detector is installed at the gas outlet. The gas outlet is connected via pipelines to both the waste gas unit and the gas inlet of the spray absorption tower. The liquid phase pipe of the water-sealed absorption tank is connected to the return port of the ammonia storage tank via a liquid discharge pump. The liquid outlet of the spray absorption tower is connected to the return port of the ammonia storage tank via a liquid discharge pump. The liquid phase pipe of the water-sealed absorption tank and the water supply port of the spray absorption tower are also connected via pipelines to the outlet of a water supply pump. The inlet of the water supply pump is connected to a pure water network. The liquid phase pipe of the water-sealed absorption tank is connected to both the liquid discharge pump and the water supply pump via a three-way switching valve.

2. The ammonia vapor absorption device according to claim 1, characterized in that, Both the water-sealed absorption tank and the spray absorption tower are equipped with an online ammonia concentration detector and a level gauge.

3. The ammonia vapor absorption device according to claim 2, characterized in that, The online ammonia concentration detector is electrically connected to the controller, and both the liquid discharge pump and the feed pump are electrically connected to the controller.

4. The ammonia vapor absorption device according to claim 3, characterized in that, The liquid discharge pump and the feed discharge pump are respectively interlocked with the liquid level gauge and the water replenishment pump through the controller; the three-way switching valve is also electrically connected to the controller.

5. The ammonia vapor absorption device according to claim 1, characterized in that, The upper part of the spray absorption tower is provided with at least one spray pipe, and the spray pipe is provided with multiple spray heads evenly distributed; the spray pipe is connected to the circulating liquid outlet at the bottom of the spray absorption tower through a circulating pump.

6. The ammonia vapor absorption device according to claim 5, characterized in that, The gas inlet of the spray absorption tower is connected to an inlet pipe, which is located inside the spray absorption tower. The inlet pipe extends to the bottom of the spray absorption tower, and the other end is not sealed. Multiple outlet holes are evenly distributed on the inlet pipe. The circulating liquid outlet is positioned at a height higher than the uppermost outlet hole of the inlet pipe.

7. The ammonia vapor absorption device according to any one of claims 1-6, characterized in that, The water seal absorption tank includes a tank body and an inner cylinder; the inner cylinder is a hollow structure and is coaxially and longitudinally arranged in the center of the tank body; gaps are left between the top and bottom ends of the inner cylinder and the tank body; an annular first partition is provided between the outer wall of the inner cylinder and the inner wall of the tank body, the first partition dividing the tank body into an upper chamber and a lower chamber; an annular second partition is provided in the lower chamber, the second partition is vertically fixed to the inner bottom surface of the tank body, and the top end of the second partition is higher than the bottom end of the inner cylinder and located outside the inner cylinder.

8. The ammonia vapor absorption device according to claim 7, characterized in that, The air inlet is located in the lower part of the upper chamber of the tank body, and its height is lower than the top of the inner cylinder; the air outlet is located in the lower part of the lower chamber of the tank body, and its height is lower than the top of the second partition; both the upper chamber and the lower chamber are provided with liquid phase ports, the two liquid phase ports are located on the same side, and are respectively connected to the liquid phase pipe through pipes.

9. The ammonia vapor absorption device according to claim 8, characterized in that, The air inlet is connected to an air distribution pipe, which is a ring structure and is located between the inner cylinder and the tank body; multiple air outlets are evenly distributed on the air distribution pipe.

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