High-efficiency and durable ammonia-containing tail gas purification device

Abstract

This utility model relates to the field of ammonia-containing exhaust gas purification technology, and discloses a highly efficient and durable ammonia-containing exhaust gas purification device, which includes a purification tower. The upper end of the purification tower is bolted to a tower top. A sealing ring is provided between the outer wall of the tower top and the outer wall of the purification tower. An air inlet pipe is connected to one side wall of the purification tower via a flange. A drain pipe is connected to the side wall of the purification tower below the air inlet pipe via a flange. A support mesh is provided on the inner wall of the purification tower above the air inlet pipe. The three-layer support mesh and packing structure greatly increase the gas-liquid contact area, which facilitates the mass transfer process between the ammonia-containing exhaust gas and the absorbent liquid within the purification tower, allowing for the full absorption of ammonia in the exhaust gas. The structure of the chemical tank, water tank, liquid level sensor, chemical inlet pipe, and flow valve eliminates the need for a pump to add chemicals to the water tank, making chemical addition more convenient and reducing manual labor.

Description

Technical Field

[0001] This utility model belongs to the field of ammonia-containing exhaust gas purification technology, specifically a high-efficiency and durable ammonia-containing exhaust gas purification device. Background Technology

[0002] Ammonia pollution refers to the environmental pollution caused by the production and utilization of ammonia during human activities. The background concentration of ammonia in the atmosphere is less than 10 × 10⁻⁶, and it reaches the explosive limit when its volume fraction in the air reaches 16%–25%. Synthetically produced ammonia is widely used in the medical, chemical, and gas industries. In the biosphere, ammonia is a product of nitrogen-fixing bacteria activity, denitrification of nitrogen compounds, and the decomposition of organic nitrogen and animal urine. The main route of ammonia harm to human health is through inhalation. Excessive inhalation of ammonia causes respiratory diseases, leading to headaches, runny nose, sore throat, loss of smell, excessive sweating, vomiting, and chest pain. It also has a strong irritant effect on the skin and eyes. Therefore, ammonia-containing exhaust gases produced in industrial production must be purified before being released.

[0003] However, existing ammonia-containing exhaust gas purification devices have a low ammonia recovery rate. The addition of chemicals to ammonia-containing exhaust gas purification devices requires the assistance of multiple pumps, resulting in a large amount of manual labor and easy corrosion affecting service life. Therefore, a high-efficiency and durable ammonia-containing exhaust gas purification device is proposed here. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides a highly efficient and durable ammonia-containing exhaust gas purification device, which effectively solves the problems existing in the current ammonia-containing exhaust gas purification devices.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a highly efficient and durable ammonia-containing tail gas purification device, comprising a purification tower, the upper end of which is bolted to a tower top. Both the purification tower and the tower top are made of aluminum alloy with a galvanized surface, providing good corrosion resistance. A sealing ring is provided between the outer wall of the tower top and the outer wall of the purification tower. An air inlet pipe is connected to one side wall of the purification tower via a flange. A drain pipe is connected to the side wall of the purification tower below the air inlet pipe via a flange. A support mesh is provided on the inner wall of the purification tower above the air inlet pipe. Packing material is provided at the upper end of the support mesh. The support mesh and the packing material consist of three layers. The tower is equipped with a spray head, a delivery pipe at the upper end of the spray head, a filter screen on the inner wall of the tower top above the spray head, an anti-corrosion pump at the end of the delivery pipe away from the spray head, a water tank on one side wall of the anti-corrosion pump, a medicine tank on one side of the upper end of the water tank, a medicine inlet pipe at the lower end of the medicine tank, the medicine inlet pipe passing through the upper end of the water tank, a flow valve on the medicine inlet pipe, liquid level sensors connected to the inner walls of the water tank and the medicine tank by screws, and a water supply pipe at the upper end of the water tank on one side of the medicine tank. The support net, the delivery pipe, the water tank, the spray head, and the medicine tank are all made of corrosion-resistant engineering plastics.

[0006] Preferably, the sealing ring is pressed between the outer wall of the purification tower and the outer wall of the tower top, the support mesh is connected to the inner wall of the purification tower by bolts, the packing is a honeycomb-structured multifaceted sphere made of corrosion-resistant engineering plastic, the sealing ring can improve the sealing between the tower top and the purification tower, and the packing can greatly increase the gas-liquid contact area, which helps the mass transfer process between the ammonia-containing tail gas and the absorption liquid in the purification tower, so that the ammonia in the ammonia-containing tail gas can be fully absorbed.

[0007] Preferably, the delivery pipe is threaded to the spray head, the delivery pipe is flanged to the side wall of the purification tower, the delivery pipe is flanged to the output end of the anti-corrosion pump, and the input pipe of the anti-corrosion pump is flanged to the water tank. The anti-corrosion pump can draw the mixed liquid in the water tank and then deliver it to the spray head through the delivery pipe, spraying it out as water mist onto the three layers of packing material to fully contact the ammonia-containing tail gas.

[0008] Preferably, the lower end of the medicine tank is bolted to the upper end of the water tank, the medicine inlet pipe is flanged to the lower end of the medicine tank, and the flow valve is threaded to the medicine inlet pipe. The medicine tank can contain dilute sulfuric acid or other ammonia absorption liquid, which can flow into the water tank through the medicine inlet pipe to be diluted with water. The flow valve can control the amount of medicine entering the water tank.

[0009] Preferably, the water supply pipe is connected to the upper end of the water tank via a flange, and the water supply pipe is connected to an external water supply pipeline to supply water to the water tank.

[0010] Preferably, the filter screen is connected to the inner wall of the tower top by bolts, and the filter screen is an activated carbon composite cotton filter screen, which can filter out impurities such as water vapor in the exhaust gas after ammonia removal.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] In this highly efficient and durable ammonia-containing exhaust gas purification device, the three-layer support mesh and packing structure greatly increase the gas-liquid contact area, which facilitates the mass transfer process between the ammonia-containing exhaust gas and the absorbent liquid within the purification tower, ensuring that the ammonia in the exhaust gas is fully absorbed. The structure of the chemical tank, water tank, liquid level sensor, inlet pipe, and flow valve eliminates the need for a pump to add chemicals to the water tank, making dosing more convenient and reducing manual labor. The purification tower and tower top are made of galvanized aluminum alloy, while the support mesh, packing, delivery pipe, water tank, spray head, and chemical tank are all made of corrosion-resistant engineering plastics, effectively resisting corrosion from ammonia-containing exhaust gas and extending the service life of the device. The structural design of the purification tower and tower top allows for convenient maintenance and replacement of the filter screen. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a front sectional view of the present invention;

[0016] Figure 3 This utility model Figure 2 A magnified view of a section at point A in the middle;

[0017] In the diagram: 1. Purification tower; 2. Tower top; 3. Sealing ring; 4. Air inlet pipe; 5. Drain pipe; 6. Support mesh; 7. Packing material; 8. Spray head; 9. Delivery pipe; 10. Filter screen; 11. Corrosion-resistant pump; 12. Water tank; 13. Medicine tank; 14. Medicine inlet pipe; 15. Flow valve; 16. Liquid level sensor; 17. Water delivery pipe. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0019] In this embodiment, by Figures 1-3 The present invention includes a purification tower 1, with a tower top 2 bolted to the upper end of the purification tower 1. A sealing ring 3 is provided between the outer wall of the tower top 2 and the outer wall of the purification tower 1. An air inlet pipe 4 is connected to one side wall of the purification tower 1 via a flange. A drain pipe 5 is connected to the side wall of the purification tower 1 below the air inlet pipe 4 via a flange. A support mesh 6 is provided on the inner wall of the purification tower 1 above the air inlet pipe 4. Packing material 7 is provided on the upper end of the support mesh 6. There are three layers of support mesh 6 and packing material 7. A spray head 8 is provided above the packing material 7, and a conveying pipe is provided on the upper end of the spray head 8. 9. A filter screen 10 is installed on the inner wall of the tower top 2 above the spray head 8. An anti-corrosion pump 11 is installed at the end of the delivery pipe 9 away from the spray head 8. A water tank 12 is installed on one side wall of the anti-corrosion pump 11. A medicine tank 13 is installed on one side of the upper end of the water tank 12. A medicine inlet pipe 14 is installed at the lower end of the medicine tank 13. The medicine inlet pipe 14 passes through the upper end of the water tank 12. A flow valve 15 is installed on the medicine inlet pipe 14. Liquid level sensors 16 are connected to the inner walls of the water tank 12 and the medicine tank 13 by screws. A water delivery pipe 17 is installed at the upper end of the water tank 12 located on one side of the medicine tank 13.

[0020] Among them, the sealing ring 3 is pressed between the outer wall of the purification tower 1 and the outer wall of the tower top 2, the support mesh 6 is connected to the inner wall of the purification tower 1 by bolts, the packing 7 is a honeycomb structure multi-faceted sphere, and the material is corrosion-resistant engineering plastic. The sealing ring 3 can improve the sealing between the tower top 2 and the purification tower 1, and the packing 7 can greatly increase the gas-liquid contact area, which helps the mass transfer process between the ammonia-containing tail gas and the absorption liquid in the purification tower 1, so that the ammonia in the ammonia-containing tail gas can be fully absorbed.

[0021] The conveying pipe 9 is connected to the spray head 8 by a thread, the conveying pipe 9 is connected to the side wall of the purification tower 1 by a flange, the conveying pipe 9 is connected to the output end of the anti-corrosion pump 11 by a flange, and the input pipe of the anti-corrosion pump 11 is connected to the water tank 12 by a flange. The anti-corrosion pump 11 can draw the mixed liquid in the water tank 12 and then deliver it to the spray head 8 through the conveying pipe 9, spraying it onto the three-layer packing 7 in the form of water mist, so as to fully contact the ammonia-containing tail gas.

[0022] The lower end of the medicine tank 13 is connected to the upper end of the water tank 12 by bolts, the medicine inlet pipe 14 is connected to the lower end of the medicine tank 13 by flange, and the flow valve 15 is connected to the medicine inlet pipe 14 by thread. The medicine tank 13 can contain dilute sulfuric acid or other ammonia absorption liquid, which can flow into the water tank 12 through the medicine inlet pipe 14 to be diluted with water. The flow valve 15 can control the amount of medicine entering the water tank 12.

[0023] The water supply pipe 17 is connected to the upper end of the water tank 12 via a flange. The water supply pipe 17 is connected to an external water supply pipeline and can supply water to the water tank 12. The filter screen 10 is connected to the inner wall of the tower top 2 via bolts. The filter screen 10 is an activated carbon composite cotton filter screen, which can filter water vapor and other impurities in the exhaust gas after ammonia removal.

[0024] Working Principle: The device uses an external power supply and is controlled by an external control device. Ammonia-containing exhaust gas is sent into the purification tower 1 through the inlet pipe 4. The water tank 12 contains water, and the water supply pipe 17 is connected to an external water supply line to supply water to the water tank 12. The liquid level sensor 16 in the water tank 12 can sense the water level in the water tank 12 in real time and feed the sensing information back to the external control device. The chemical tank 13 can hold dilute sulfuric acid or other ammonia absorption liquid, which can flow into the water tank 12 through the chemical inlet pipe 14 to dilute with water. The flow valve 15 can control the amount of chemical entering the water tank 12. The liquid level sensor 16 in the chemical tank 13 can sense the amount of chemical in the chemical tank 13 in real time and feed the sensing information back to the external control device. When the absorption liquid in the chemical tank 13 is insufficient, it will notify the operator. The staff adds the medicine in a timely manner, and the control equipment of the device controls the flow valve 15 according to the set ratio to send the appropriate amount of medicine into the water tank 12 through the medicine inlet pipe 14. When the anti-corrosion pump 11 is working, it can draw the mixed liquid in the water tank 12 and then transport it to the purification tower 1 through the delivery pipe 9. It is sprayed out in the form of water mist through the spray head 8 onto the three-layer packing 7. The honeycomb structure of the multi-faceted spherical packing 7 can greatly increase the gas-liquid contact area, which helps the mass transfer process between the ammonia-containing tail gas and the absorption liquid in the purification tower 1, so that the ammonia in the ammonia-containing tail gas can be fully absorbed. The ammonium sulfate solution produced by the absorption liquid absorbing ammonia flows to the bottom of the purification tower 1. After the valve on the drain pipe 5 is opened, it can be discharged through the drain pipe 5 for recycling and reuse. The purified tail gas can be discharged through the top of the purification tower.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] 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. A highly efficient and durable ammonia-containing exhaust gas purification device, comprising a purification tower (1), characterized in that: The purification tower (1) is bolted to a tower top (2). A sealing ring (3) is provided between the outer wall of the tower top (2) and the outer wall of the purification tower (1). An air inlet pipe (4) is connected to one side wall of the purification tower (1) via a flange. A drain pipe (5) is connected to the side wall of the purification tower (1) below the air inlet pipe (4) via a flange. A support net (6) is provided on the inner wall of the purification tower (1) above the air inlet pipe (4). A packing material (7) is provided at the upper end of the support net (6). The support net (6) and the packing material (7) have three layers. A spray head (8) is provided above the packing material (7). A conveying pipe (9) is provided at the upper end of the spray head (8). (8) A filter screen (10) is provided on the inner wall of the top of the tower (2) above. A corrosion-resistant pump (11) is provided at the end of the delivery pipe (9) away from the spray head (8). A water tank (12) is provided on one side wall of the corrosion-resistant pump (11). A medicine tank (13) is provided on one side of the upper end of the water tank (12). A medicine inlet pipe (14) is provided at the lower end of the medicine tank (13). The medicine inlet pipe (14) passes through the upper end of the water tank (12). A flow valve (15) is provided on the medicine inlet pipe (14). A liquid level sensor (16) is connected to the inner wall of the water tank (12) and the medicine tank (13) by screws. A water delivery pipe (17) is provided at the upper end of the water tank (12) located on one side of the medicine tank (13).

2. The efficient and durable ammonia-containing exhaust gas purification device according to claim 1, characterized in that: The sealing ring (3) is pressed between the outer wall of the purification tower (1) and the outer wall of the tower top (2). The support net (6) is connected to the inner wall of the purification tower (1) by bolts. The filler (7) is a honeycomb structure multifaceted sphere made of corrosion-resistant plastic.

3. The efficient and durable ammonia-containing exhaust gas purification device according to claim 1, characterized in that: The delivery pipe (9) is connected to the spray head (8) by a thread, the delivery pipe (9) is connected to the side wall of the purification tower (1) by a flange, the delivery pipe (9) is connected to the output end of the anti-corrosion pump (11) by a flange, and the input pipe of the anti-corrosion pump (11) is connected to the water tank (12) by a flange.

4. The efficient and durable ammonia-containing exhaust gas purification device according to claim 1, characterized in that: The lower end of the medicine tank (13) is connected to the upper end of the water tank (12) by bolts, the medicine inlet pipe (14) is connected to the lower end of the medicine tank (13) by flange, and the flow valve (15) is connected to the medicine inlet pipe (14) by thread.

5. The efficient and durable ammonia-containing exhaust gas purification device according to claim 1, characterized in that: The water supply pipe (17) is connected to the upper end of the water tank (12) via a flange.

6. The efficient and durable ammonia-containing exhaust gas purification device according to claim 1, characterized in that: The filter screen (10) is connected to the inner wall of the tower top (2) by bolts.

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