Ammonia gas recovery device

Abstract

The utility model discloses an ammonia gas recovery device, and particularly relates to the technical field of ammonia gas recovery, the ammonia gas recovery device comprises a recovery box assembly, a gas diffusion assembly is fixedly installed in the middle of the front face of the recovery box assembly, the recovery box assembly comprises a recovery box body, an absorption cavity is formed in the recovery box body, the gas diffusion assembly comprises a gas inlet pipe, and the gas inlet pipe is communicated with the absorption cavity. The ammonia gas recovery device comprises a gas inlet pipe, a filter plate, a conical gas expansion hopper and two annular pipes are sequentially and fixedly installed in the gas inlet pipe from the front end to the rear end, and an impurity removal pipe is fixedly connected to the front end of the bottom of a pipe body of the gas inlet pipe in an inserted mode. According to the ammonia gas recycling device, the ammonia gas flowing speed can be effectively reduced, the ammonia gas can be dispersed, the diffused ammonia gas can be fully sprayed through mutual cooperation of a first spraying head and a second spraying head, the ammonia gas can be rapidly dissolved in cold water, the ammonia gas recycling efficiency is effectively improved, and the practicability is higher.

Description

Technical Field

[0001] This utility model relates to the field of ammonia recovery technology, specifically to an ammonia recovery device. Background Technology

[0002] Wet strength agents are mainly used in the papermaking industry. The production process of wet strength agents generates a large amount of ammonia gas. Direct emission of ammonia gas causes environmental pollution, and since ammonia gas has multiple uses after dissolving in water, direct emission also results in unnecessary waste. Therefore, the ammonia gas generated during the wet strength agent production process is mostly collected by cold water, dissolved in water, and then reused in industry. These collection devices typically pass the ammonia gas directly through a recovery tank equipped with a spray mechanism. The cold water sprayed by the mechanism comes into contact with the ammonia gas from the wet strength agent reaction vessel, thereby achieving the recovery and reuse of the ammonia gas.

[0003] Chinese patent application number 202420201425.8 discloses an ammonia recovery device and a wet strength agent production system, including a heat exchange box and a recovery box. The heat exchange box contains a heat exchange coil for introducing cold water. The outer wall of the heat exchange box has an inlet pipe and an outlet pipe. The inlet pipe connects to the wet strength agent reactor, and the outlet pipe connects to the recovery box via a pipeline. The recovery box is equipped with a spray mechanism and a drain pipe. This application achieves heat recovery from ammonia by exchanging heat with the high-temperature ammonia through the heat exchange coil in the heat exchange box before the ammonia enters the recovery box. This significantly reduces the temperature of the ammonia, improves the efficiency of ammonia dissolving in water, and removes the heat from the ammonia through the water medium. The hot water can then be used in production, thus realizing heat recovery from the ammonia and reducing production costs.

[0004] However, the ammonia recovery device for wet strength agent production still has some shortcomings in actual use. For example, ammonia generally enters the recovery tank directly, and the ammonia flow rate is relatively high, which affects the effective spraying of ammonia and reduces the degree of ammonia absorption. Utility Model Content

[0005] The purpose of this invention is to provide an ammonia recovery device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an ammonia recovery device, comprising a recovery box assembly, wherein a gas diffusion component is fixedly installed in the center of the front side of the recovery box assembly, the recovery box assembly includes a recovery box body, and an absorption chamber is provided inside the recovery box body;

[0007] The gas diffusion assembly includes an inlet pipe, inside which a filter plate, a conical diffuser, and two annular pipes are fixedly installed sequentially from front to rear. A sludge discharge pipe is fixedly inserted into the front bottom of the inlet pipe, and the top of the sludge discharge pipe is connected to the inside of the inlet pipe. A threaded cap is threaded onto the bottom end of the sludge discharge pipe. Several air inlet holes are opened on the side of the cylindrical part of the conical diffuser. Several second-order spray heads are fixedly installed on the inner annular surfaces of the two annular pipes. The several second-order spray heads are evenly distributed in a ring on the inner side of the annular pipes. A bifurcated pipe is fixedly inserted into the rear top of the inlet pipe, and the bottom end of the bifurcated pipe is connected to the two annular pipes.

[0008] Both the filter plate and the air inlet pipe are inclined. The air inlet pipe is fixedly installed in the center of the front of the recovery box, and one end of the air inlet pipe is connected to the absorption chamber.

[0009] Preferably, a circulation pipe is provided at the bottom of the back of the recycling bin, and a solenoid valve is provided at one end of the circulation pipe near the recycling bin.

[0010] Preferably, a circulation pump is installed in the middle of the circulation pipe, and a water injection pipe is fixedly inserted into the middle of the top surface of the recycling tank.

[0011] Preferably, one end of the circulation pipe is connected to the water injection pipe, and a second solenoid valve is provided at the top of the water injection pipe.

[0012] Preferably, a diversion plate is fixedly installed at the bottom end of the water injection pipe, and a plurality of No. 1 spray heads are fixedly installed on the bottom surface of the diversion plate, with the plurality of No. 1 spray heads evenly distributed on the bottom surface of the diversion plate.

[0013] Preferably, a control panel is fixedly installed on the middle of one side of the recycling bin, and a drain pipe is provided at the bottom of the front of the recycling bin.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This ammonia recovery device uses a conical diffuser to divide and disperse the ammonia gas entering the inlet pipe, effectively reducing the flow velocity of the ammonia gas and allowing it to disperse. The coordinated use of two spray heads ensures thorough spraying of the dispersed ammonia gas, enabling it to quickly dissolve into cold water and significantly improving ammonia recovery efficiency, making it more practical. Attached Figure Description

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

[0017] Figure 2This is a cross-sectional three-dimensional structural diagram of the present invention;

[0018] Figure 3 This is a three-dimensional structural diagram of the recycling bin assembly of this utility model;

[0019] Figure 4 This is a schematic diagram of the gas diffusion component structure of this utility model.

[0020] In the diagram: 1. Recycling bin assembly; 101. Recycling bin body; 102. Absorption chamber; 103. Circulation pipe; 104. Solenoid valve No. 1; 105. Circulation pump; 106. Water injection pipe; 107. Solenoid valve No. 2; 108. Diverter plate; 109. Spray head No. 1; 110. Control panel; 111. Drain pipe; 2. Gas diffusion assembly; 201. Air inlet pipe; 202. Filter plate; 203. Conical diffuser; 204. Annular pipe; 205. Waste discharge pipe; 206. Air inlet; 207. Spray head No. 2; 208. Branch pipe. Detailed Implementation

[0021] 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.

[0022] like Figure 1-4 As shown, this utility model provides a technical solution: including a recycling bin assembly 1, a gas diffusion assembly 2 is fixedly installed in the center of the front of the recycling bin assembly 1, the recycling bin assembly 1 includes a recycling bin body 101, and an absorption cavity 102 is opened in the recycling bin body 101;

[0023] The gas diffusion assembly 2 includes an air inlet pipe 201. A filter plate 202, a conical diffuser 203, and two annular pipes 204 are sequentially fixedly installed inside the air inlet pipe 201 from front to rear. A waste discharge pipe 205 is fixedly inserted into the bottom front end of the air inlet pipe 201. The top end of the waste discharge pipe 205 is connected to the interior of the air inlet pipe 201. A threaded cap is threaded onto the bottom end of the waste discharge pipe 205. Several air inlet holes 206 are opened on the side of the cylindrical portion of the conical diffuser 203. Several secondary spray heads 207 are fixedly installed on the inner annular surfaces of the two annular pipes 204. The secondary spray heads 207 are evenly distributed in a ring on the inner side of the annular pipes 204. A branch pipe 208 is fixedly inserted into the top rear end of the air inlet pipe 201. The bottom end of the branch pipe 208 is connected to the two annular pipes 204.

[0024] Both the filter plate 202 and the air inlet pipe 201 are inclined. The air inlet pipe 201 is fixedly installed in the center of the front of the recycling box 101, and one end of the air inlet pipe 201 is connected to the absorption chamber 102.

[0025] In this embodiment, a circulation pipe 103 is provided at the bottom of the back side of the recycling tank 101. A solenoid valve 104 is provided at one end of the circulation pipe 103 near the recycling tank 101. When the solenoid valve 104 on the circulation pipe 103 is opened, the low-concentration ammonia water in the recycling tank 101 is extracted by the circulation pump 105, and then the low-concentration ammonia water is injected back into the recycling tank 101 through the water injection pipe 106. This circulation can effectively increase the ammonia concentration in the cold water.

[0026] Meanwhile, a circulation pump 105 is installed in the middle of the circulation pipe 103, and a water injection pipe 106 is fixedly inserted into the middle of the top surface of the recovery box 101. A second solenoid valve 107 is installed at the top of the water injection pipe 106. One end of the circulation pipe 103 is connected to the water injection pipe 106. The second solenoid valve 107 is installed on the water injection pipe 106. After the amount of cold water injected in one round reaches the standard, the second solenoid valve 107 is closed, which can control the amount of water injected.

[0027] A diversion plate 108 is fixedly installed at the bottom end of the water injection pipe 106. Several No. 1 spray heads 109 are fixedly installed on the bottom surface of the diversion plate 108. The several No. 1 spray heads 109 are evenly distributed on the bottom surface of the diversion plate 108. The cold water source delivers cold water to the diversion plate 108 through the water injection pipe 106, and then sprays it into the recovery tank 101 from the No. 1 spray heads 109. Ammonia gas enters the recovery tank 101 and comes into contact with the cold water, easily forming ammonia water in the water, thereby realizing the recovery of ammonia gas.

[0028] A control panel 110 is fixedly installed on the middle of one side of the recycling box 101, and a drain pipe 111 is provided at the bottom of the front of the recycling box 101, so that the cold water that has absorbed ammonia can be conveniently discharged from the drain pipe 111.

[0029] In use, connect the air inlet pipe 201 to the exhaust port of the wet strength agent reactor. The ammonia gas generated in the reactor enters the recovery tank 101 through the air inlet pipe 201. During the process of passing through the air inlet pipe 201, the ammonia gas first passes through the filter plate 202, which can intercept larger solid particles of impurities contained in the ammonia gas. Then, the filtered ammonia gas flows to the conical diffuser 203, and then the ammonia gas enters the conical diffuser 203 through the air inlet 206, thereby dispersing the ammonia gas and reducing its flow rate. At the same time, open the second solenoid valve 107, and cold water will enter through the water injection pipe 106. The cold water flowing through the branch pipe 208 into the diversion plate 108 and the branch pipe 208 is injected into the two annular pipes 204. Then, it is sprayed out through two sets of ring-shaped No. 2 spray heads 207 to achieve preliminary and effective spraying of the tail gas ammonia and to fully absorb it. The diffused and slowed ammonia gas will escape into the recovery box 101. In the recovery box 101, it will come into contact with the cold water sprayed from the No. 1 spray head 109 and further dissolve in the cold water, thus realizing the recovery and utilization of ammonia gas in the wet strength agent production process. The intercepted impurities can be manually removed by removing the threaded cap at the bottom of the impurity discharge pipe 205 and then discharged.

[0030] An external cold water source delivers cold water to the diversion plate 108 via the water injection pipe 106, and then sprays it into the recovery tank 101 through the first spray head 109. Ammonia gas enters the recovery tank 101 and comes into contact with the cold water, easily forming ammonia water, thus achieving ammonia recovery. However, a single contact is insufficient for the ammonia gas to fully dissolve in the water, leading to an accumulation of water in the recovery tank 101. This necessitates timely removal of the cold water, resulting in a waste of cold water resources and a low concentration of ammonia water. Therefore, the cold water entering the recovery tank 101 can be circulated, pumped out, and sprayed out through the first spray head 109. The low-concentration ammonia water in the recovery tank 101 is extracted and then reintroduced into the recovery tank 101, so that the low-concentration ammonia water comes into contact with ammonia gas again, increasing the ammonia water concentration. The circulation pipe 103 is equipped with a first solenoid valve 104, and the water injection pipe 106 is equipped with a second solenoid valve 107. After the amount of cold water injected in one round reaches the standard, the second solenoid valve 107 is closed, and the first solenoid valve 104 on the circulation pipe 103 is opened. The low-concentration ammonia water in the recovery tank 101 is extracted by the circulation pump 105, and then the low-concentration ammonia water is injected back into the recovery tank 101 through the water injection pipe 106. This cycle can effectively increase the ammonia gas concentration in the cold water.

[0031] In summary, this ammonia recovery device utilizes a conical diffuser 203 to divide and disperse the ammonia gas entering the inlet pipe 201, thereby achieving ammonia diffusion. This effectively reduces the ammonia flow velocity, causing the ammonia to disperse. Furthermore, the coordinated action of the first spray head 109 and the second spray head 207 ensures thorough spraying of the diffused ammonia, allowing it to quickly dissolve into the cold water. This significantly improves ammonia recovery efficiency and enhances practicality.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ammonia recovery device, comprising a recovery tank assembly (1), characterized in that... A gas diffusion component (2) is fixedly installed in the center of the front of the recycling bin assembly (1). The recycling bin assembly (1) includes a recycling bin body (101) and an absorption chamber (102) is opened inside the recycling bin body (101). The gas diffusion assembly (2) includes an inlet pipe (201). A filter plate (202), a conical diffuser (203), and two annular pipes (204) are sequentially fixedly installed inside the inlet pipe (201) from front to rear. A waste discharge pipe (205) is fixedly inserted into the bottom front end of the inlet pipe (201). The top end of the waste discharge pipe (205) is connected to the inside of the inlet pipe (201). A threaded cap is threaded onto the bottom end of the waste discharge pipe (205). The conical diffuser... The cylindrical part of the air bucket (203) has several air inlets (206) on its side. Several second-level spray heads (207) are fixedly installed on the inner ring surface of the two annular pipes (204). The several second-level spray heads (207) are evenly distributed in a ring on the inner side of the annular pipes (204). A bifurcated pipe (208) is fixedly inserted into the rear end of the top of the air inlet pipe (201). The bottom end of the bifurcated pipe (208) is connected to the two annular pipes (204). The filter plate (202) and the air inlet pipe (201) are both inclined. The air inlet pipe (201) is fixedly installed in the center of the front of the recycling box (101), and one end of the air inlet pipe (201) is connected to the absorption chamber (102).

2. The ammonia recovery device according to claim 1, characterized in that, A circulation pipe (103) is provided at the bottom of the back side of the recycling box (101), and a solenoid valve (104) is provided at one end of the circulation pipe (103) near the recycling box (101).

3. The ammonia recovery device according to claim 2, characterized in that, A circulation pump (105) is installed in the middle of the circulation pipe (103), and a water injection pipe (106) is fixedly inserted into the middle of the top surface of the recovery box (101).

4. The ammonia recovery device according to claim 3, characterized in that, One end of the circulation pipe (103) is connected to the water injection pipe (106), and a second solenoid valve (107) is provided at the top of the water injection pipe (106).

5. An ammonia recovery device according to claim 3, characterized in that, A diversion plate (108) is fixedly installed at the bottom end of the water injection pipe (106). Several No. 1 spray heads (109) are fixedly installed on the bottom surface of the diversion plate (108). The several No. 1 spray heads (109) are evenly distributed on the bottom surface of the diversion plate (108).

6. The ammonia recovery device according to claim 1, characterized in that, A control panel (110) is fixedly installed in the middle of one side of the recycling bin (101), and a drain pipe (111) is provided at the bottom of the front of the recycling bin (101).

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