A multi-stage purification device for phenylhydrazine hydrochloride production waste gas treatment
By designing a multi-stage purification device, combining purification towers and activated carbon particles for multi-stage purification treatment, the problem of residual fine particulate matter and acidic gases in the waste gas from the production of phenylhydrazine hydrochloride was solved, achieving efficient waste gas purification and cost control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QIDONG A&P CHEM FACTORY
- Filing Date
- 2025-06-30
- Publication Date
- 2026-05-29
AI Technical Summary
Existing waste gas treatment devices for phenylhydrazine hydrochloride production lack auxiliary filtration structures, resulting in the residue of pollutants such as fine particulate matter, incompletely absorbed acidic gas molecules, and aerosols, which affects air quality.
Design a multi-stage purification device, including a liquid storage tank, a purification mechanism and an auxiliary mechanism. Utilize a purification tower for acid-base neutralization reaction, combined with deep filtration of activated carbon particles, to achieve gas-liquid countercurrent contact and activated carbon adsorption, ensuring purification effect.
It achieves deep purification of exhaust gas, reduces operating costs, ensures that emissions meet high standards, and reduces potential harm to the environment and human health.
Smart Images
Figure CN224292919U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waste gas purification technology, and in particular to a multi-stage purification device for treating waste gas from the production of phenylhydrazine hydrochloride. Background Technology
[0002] The waste gas generated during the production of phenylhydrazine hydrochloride is mainly sulfur dioxide, and may also contain small amounts of pollutants such as phenylhydrazine and hydrogen chloride.
[0003] To address the aforementioned issues, existing patents have provided solutions. However, existing multi-stage purification devices for treating waste gas from phenylhydrazine hydrochloride production lack a structure for auxiliary filtration of the purified waste gas. This results in some fine particulate matter, unabsorbed acidic gas molecules, and aerosols remaining in the waste gas, thus affecting the quality of the surrounding air.
[0004] Therefore, a multi-stage purification device for treating waste gas from the production of phenylhydrazine hydrochloride is proposed. Utility Model Content
[0005] The purpose of this invention is to provide a multi-stage purification device for treating waste gas from the production of phenylhydrazine hydrochloride. This device addresses the problem that existing waste gas purification systems lack an auxiliary filtration structure for the purified waste gas, resulting in some fine particulate matter, incompletely absorbed acidic gas molecules, and aerosols remaining in the waste gas, thus affecting the quality of the surrounding air.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage purification device for treating waste gas from the production of phenylhydrazine hydrochloride, comprising a storage tank, a purification mechanism fixedly connected to the top of the storage tank, an auxiliary mechanism fixedly connected to the top right side of the purification mechanism, a receiving tray slidably connected to the top inside the storage tank, a filling pipe fixedly connected to the top right side of the storage tank, and a PLC controller fixedly connected to the left side of the top of the storage tank.
[0007] The auxiliary mechanism includes a fixed pipe, a purification box, two purification containers, activated carbon granules, and an exhaust pipe. The fixed pipe is fixedly connected to the right side of the purification mechanism, the purification box is fixedly connected to the bottom of the fixed pipe, the purification container is slidably connected to the inside of the purification box, the activated carbon granules are placed inside the purification container, and the exhaust pipe is fixedly connected to the top of the purification box.
[0008] Preferably, the purification mechanism includes a purification tower, an air inlet pipe, an air outlet pipe, a solenoid one-way valve, a connecting pipe, a spray head, a circulation pipe, and a circulation pump, with the purification tower installed on top of the liquid storage tank.
[0009] Preferably, the air inlet pipe is fixedly connected to the bottom of the left side of the purification tower, the air outlet pipe is fixedly connected to the top of the right side of the purification tower, the electromagnetic one-way valves are fixedly connected to the left side of the air inlet pipe and the right side of the air outlet pipe respectively, and the connecting pipe is fixedly connected to the left side of the left electromagnetic one-way valve.
[0010] Preferably, the fixed pipe is fixedly connected to the right side of the right electromagnetic one-way valve, the spray head is fixedly connected to the top of the inner side of the purification tower, the circulation pipe is fixedly connected to the top of the spray head, the side of the circulation pipe away from the spray head is fixedly connected to the front side of the circulation pump, and the rear side of the circulation pump is fixedly connected to the rear side of the liquid storage tank.
[0011] Preferably, a stopper cap is snapped onto the top of the inner side of the filling tube, and the surface of the stopper cap is engraved with anti-slip texture.
[0012] Preferably, the bottom of the purification box is configured as a filter screen, and handles are welded to the front side of the purification box and the front side of the receiving tray.
[0013] Preferably, a reinforcing base is fixedly connected to the bottom of the circulating pump, and the surface of the reinforcing base is coated with an anti-corrosion coating.
[0014] Preferably, three Pall rings are fixedly connected to the inner side of the purification tower, and the surface of the Pall rings is coated with an anti-corrosion coating.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] 1. The purification mechanism of this application introduces the waste gas into the purification tower through the air inlet pipe. The circulation pump drives the absorbent liquid in the storage tank to be sprayed out through the circulation pipe and spray head, and contact the waste gas in the opposite direction. The acid pollutants are removed by acid-base neutralization reaction, realizing the recycling of absorbent liquid and reducing costs. The electromagnetic one-way valve controls the unidirectional flow of gas to avoid waste gas backflow.
[0017] 2. The exhaust gas treated by the purification mechanism in this application enters the purification box through a fixed pipe. Inside the box are two purification boxes containing activated carbon granules, which can effectively adsorb residual fine particulate matter, odor substances, and incompletely absorbed acidic gas molecules, achieving deep filtration. The filter mesh design at the bottom of the purification box ensures smooth gas passage and full contact with the activated carbon. The sliding purification box design makes it easy to remove and replace the activated carbon periodically, making operation convenient. The exhaust pipe discharges the finally purified gas, ensuring that the emission gas meets higher standards and reducing potential harm to the environment and human health. Attached Figure Description
[0018] Figure 1 This is an overall structural diagram of the multi-stage purification device for treating waste gas from the production of phenylhydrazine hydrochloride according to this utility model.
[0019] Figure 2This is a schematic diagram of the auxiliary mechanism of this utility model;
[0020] Figure 3 This is a schematic diagram of the structure of the purification tower of this utility model;
[0021] Figure 4 This is a schematic diagram of the structure of the Pall ring of this utility model;
[0022] Figure 5 This is a schematic diagram of the structure of the reinforcing base of this utility model.
[0023] In the diagram, 1. Storage tank; 2. Purification mechanism; 21. Purification tower; 22. Inlet pipe; 23. Outlet pipe; 24. Solenoid one-way valve; 25. Connecting pipe; 26. Spray head; 27. Circulation pipe; 28. Circulation pump; 3. Auxiliary mechanism; 31. Fixing pipe; 32. Purification box; 33. Purification container; 34. Activated carbon granules; 35. Exhaust pipe; 4. Receiving tray; 5. Filling pipe; 6. PLC controller; 7. Plug; 8. Handle; 9. Reinforcing base; 10. Pall ring. Detailed Implementation
[0024] 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.
[0025] Please see Figure 1-5 The present invention provides the following technical solution:
[0026] A multi-stage purification device for treating waste gas from the production of phenylhydrazine hydrochloride includes a storage tank 1, a purification mechanism 2 fixedly connected to the top of the storage tank 1, an auxiliary mechanism 3 fixedly connected to the top right side of the purification mechanism 2, a receiving tray 4 slidably connected to the top inside the storage tank 1, a filling pipe 5 fixedly connected to the top right side of the storage tank 1, and a PLC controller 6 fixedly connected to the left side of the top of the storage tank 1.
[0027] The auxiliary mechanism 3 includes a fixed pipe 31, a purification box 32, two purification boxes 33, activated carbon particles 34, and an exhaust pipe 35. The fixed pipe 31 is fixedly connected to the right side of the purification mechanism 2, the purification box 32 is fixedly connected to the bottom of the fixed pipe 31, the purification box 33 is slidably connected to the inside of the purification box 32, the activated carbon particles 34 are placed inside the purification box 33, and the exhaust pipe 35 is fixedly connected to the top of the purification box 32.
[0028] In this embodiment: A storage tank 1 serves as the container for the absorbent liquid, providing a continuous source of absorbent liquid for the purification mechanism 2, ensuring the continuity of the purification process. A receiving tray 4 is slidably installed on the top inner side of the storage tank 1 to collect sediment and impurities generated during the purification process. Regular cleaning prevents impurities from clogging the pipes and affecting the purification effect, ensuring normal equipment operation. A filling pipe 5 facilitates the addition of absorbent liquid to the storage tank 1, maintaining the effective concentration and quantity of the absorbent liquid. A PLC controller 6 allows operators to easily control the start and stop of the circulating pump 28, and the opening and closing of the solenoid single-way valve 24. A fixed pipe 31 serves as a channel connecting the purification mechanism 2 and the purification tank 32, guiding the purified waste gas to the purification chamber. The purification box 32 supports and limits the purification box 33 and the exhaust pipe 35. The sliding connection of the purification box 33 greatly facilitates daily maintenance and replacement. Operators can easily pull out the purification box 33 to replace or clean the activated carbon particles 34. At the same time, it can support and limit the activated carbon particles 34. The activated carbon particles 34 utilize their well-developed pore structure and huge specific surface area to deeply adsorb the residual micro-particles, odor substances, incompletely absorbed acidic gas molecules, and some organic pollutants after being treated by the purification mechanism 2, further improving the degree of exhaust gas purification. The exhaust pipe 35 discharges the gas that has been fully adsorbed and purified by the activated carbon.
[0029] Specifically, such as Figure 3 , Figure 4 As shown, the purification mechanism 2 includes a purification tower 21, an air inlet pipe 22, an air outlet pipe 23, a solenoid one-way valve 24, a connecting pipe 25, a spray head 26, a circulation pipe 27, and a circulation pump 28. The purification tower 21 is installed on top of the liquid storage tank 1.
[0030] Specifically, such as Figure 3 , Figure 4 As shown, the air inlet pipe 22 is fixedly connected to the bottom left side of the purification tower 21, the air outlet pipe 23 is fixedly connected to the top right side of the purification tower 21, the electromagnetic single-way valve 24 is fixedly connected to the left side of the air inlet pipe 22 and the right side of the air outlet pipe 23 respectively, and the connecting pipe 25 is fixedly connected to the left side of the left electromagnetic single-way valve 24.
[0031] Specifically, such as Figure 3 , Figure 4 As shown, the fixed pipe 31 is fixedly connected to the right side of the right electromagnetic single-way valve 24, the spray head 26 is fixedly connected to the top of the inner side of the purification tower 21, the circulation pipe 27 is fixedly connected to the top of the spray head 26, the side of the circulation pipe 27 away from the spray head 26 is fixedly connected to the front side of the circulation pump 28, and the rear side of the circulation pump 28 is fixedly connected to the rear side of the liquid storage tank 1.
[0032] In this embodiment: a purification tower 21 is set up to provide a site for gas-liquid reaction. The inlet pipe 22 allows the waste gas to enter the purification tower 21 from bottom to top, forming a countercurrent contact with the absorbent sprayed from top to bottom, increasing the mass transfer efficiency. The outlet pipe 23 discharges the purified gas, and its position is diagonally opposite to the inlet pipe 22, guiding the waste gas to flow fully in the purification tower 21. The electromagnetic one-way valve 24 is installed on the inlet pipe 22 and the outlet pipe 23 respectively, and realizes the unidirectional flow of gas through electromagnetic control, controlling the inflow of waste gas and the discharge of purified gas. The connecting pipe 25 connects the external waste gas source to the inlet pipe 22. The spray head 26 atomizes the absorbent into fine droplets and sprays them out, greatly increasing the gas-liquid contact area. The circulation pipe 27 connects the spray head 26 and the circulation pump 28 to form an absorbent circulation channel, realizing the reuse of absorbent and reducing operating costs. The circulation pump 28 provides power for the circulation of absorbent, pumping the absorbent in the storage tank 1 to the spray head 26 through the circulation pipe 27.
[0033] Specifically, such as Figure 1 As shown, a stopper cap 7 is snapped onto the top of the inner side of the filling tube 5, and the surface of the stopper cap 7 is engraved with anti-slip texture.
[0034] Specifically, such as Figure 5 As shown, the bottom of the purification box 33 is designed as a filter screen, and handles 8 are welded to the front of both the purification box 33 and the receiving tray 4.
[0035] In this embodiment: by setting up the filling pipe 5, a channel is provided for replenishing the absorbent liquid in the storage tank 1, which makes it easy for operators to quickly add liquid and maintain the stable operation of the purification system. By setting the plug 7 to be snapped into the top of the inner side of the filling pipe 5, the absorbent liquid can be effectively prevented from evaporating and external dust and impurities can be prevented from entering the storage tank 1 and contaminating the liquid. By setting the anti-slip texture, it is easier for operators to open or close the plug 7 and it is less likely to slip.
[0036] Specifically, such as Figure 5 As shown, a reinforcing base 9 is fixedly connected to the bottom of the circulating pump 28, and the surface of the reinforcing base 9 is coated with an anti-corrosion coating.
[0037] Specifically, such as Figure 4 As shown, three Pall rings 10 are fixedly connected to the inner side of the purification tower 21, and the surface of the Pall rings 10 is coated with anti-corrosion coating.
[0038] In this embodiment: by setting the reinforcing seat 9, the installation stability of the circulating pump 28 is enhanced, and the noise generated by vibration during operation is reduced. By setting the anti-corrosion coating, the erosion of the absorbent liquid and acidic gas can be resisted, and the service life of the reinforcing seat 9 can be extended. By setting the Pall ring 10, its unique hollow annular structure greatly increases the gas-liquid contact area, prolongs the residence time of gas in the purification tower 21, strengthens the mass transfer process, and significantly improves the reaction efficiency of pollutants in the waste gas with the absorbent liquid. By setting the anti-corrosion coating, the Pall ring 10 can be prevented from being corroded by the absorbent liquid, and the packing structure can be kept intact and the performance stable.
[0039] Working principle: First, the waste gas from the production of phenylhydrazine hydrochloride to be treated is connected to the purification tower 21 through connecting pipe 25. Under the control of PLC controller 6, the left-side electromagnetic single-way valve 24 is opened, and the waste gas enters the purification tower 21 from bottom to top through inlet pipe 22. Next, the operator starts the circulation pump 28 through PLC controller 6. The circulation pump 28 transports the absorbent liquid in the storage tank 1 to the spray head 26 at the top of the purification tower 21 through circulation pipe 27. The spray head 26 atomizes the absorbent liquid and sprays it downwards, forming a countercurrent contact with the waste gas from bottom to top. At this time, the Pall rings 10 in the purification tower 21 further increase the gas-liquid contact area and reaction time, and the acidic waste gas reacts with the absorbent liquid. The absorbent undergoes a complete neutralization reaction, completing the initial purification. The purified gas flows out from the outlet pipe 23. Then, the initially purified gas enters the purification box 32 of the auxiliary mechanism 3 through the fixed pipe 31. Inside the box, the gas comes into full contact with the activated carbon particles 34 filled in the purification box 33. The activated carbon utilizes its own adsorption properties to deeply adsorb residual fine particles, odor substances, incompletely absorbed acidic gas molecules, and organic pollutants. Finally, the gas, after being deeply purified by the activated carbon, is discharged from the device through the exhaust pipe 35. When the activated carbon particles 34 have been used for a long time, the operator can simply pull out the purification box 33 through the handle 8 to replace the activated carbon particles 34.
[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements 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 multi-stage purification device for treating waste gas from the production of phenylhydrazine hydrochloride, comprising a storage tank (1), characterized in that: A purification mechanism (2) is fixedly connected to the top of the liquid storage tank (1), an auxiliary mechanism (3) is fixedly connected to the top right side of the purification mechanism (2), a receiving tray (4) is slidably connected to the top inside the liquid storage tank (1), a filling pipe (5) is fixedly connected to the top right side of the liquid storage tank (1), and a PLC controller (6) is fixedly connected to the left side of the top of the liquid storage tank (1). The auxiliary mechanism (3) includes a fixed pipe (31), a purification box (32), two purification boxes (33), activated carbon particles (34), and an exhaust pipe (35). The fixed pipe (31) is fixedly connected to the right side of the purification mechanism (2). The purification box (32) is fixedly connected to the bottom of the fixed pipe (31). The purification box (33) is slidably connected to the inside of the purification box (32). The activated carbon particles (34) are placed inside the purification box (33). The exhaust pipe (35) is fixedly connected to the top of the purification box (32).
2. The multi-stage purification device for treating waste gas from phenylhydrazine hydrochloride production according to claim 1, characterized in that: The purification mechanism (2) includes a purification tower (21), an air inlet pipe (22), an air outlet pipe (23), an electromagnetic one-way valve (24), a connecting pipe (25), a spray head (26), a circulation pipe (27), and a circulation pump (28). The purification tower (21) is installed on top of the liquid storage tank (1).
3. The multi-stage purification device for treating waste gas from phenylhydrazine hydrochloride production according to claim 2, characterized in that: The air inlet pipe (22) is fixedly connected to the bottom left side of the purification tower (21), the air outlet pipe (23) is fixedly connected to the top right side of the purification tower (21), the electromagnetic single-way valve (24) is fixedly connected to the left side of the air inlet pipe (22) and the right side of the air outlet pipe (23) respectively, and the connecting pipe (25) is fixedly connected to the left side of the left electromagnetic single-way valve (24).
4. A multi-stage purification device for treating waste gas from phenylhydrazine hydrochloride production according to claim 2, characterized in that: The fixed pipe (31) is fixedly connected to the right side of the right electromagnetic single-way valve (24), the spray head (26) is fixedly connected to the top of the inner side of the purification tower (21), the circulation pipe (27) is fixedly connected to the top of the spray head (26), the side of the circulation pipe (27) away from the spray head (26) is fixedly connected to the front side of the circulation pump (28), and the rear side of the circulation pump (28) is fixedly connected to the rear side of the liquid storage tank (1).
5. A multi-stage purification device for treating waste gas from the production of phenylhydrazine hydrochloride according to claim 1, characterized in that: The top of the inner side of the filling tube (5) is fitted with a stopper cap (7), and the surface of the stopper cap (7) is engraved with anti-slip texture.
6. A multi-stage purification device for treating waste gas from phenylhydrazine hydrochloride production according to claim 1, characterized in that: The bottom of the purification box (33) is made into a filter screen, and handles (8) are welded to the front side of the purification box (33) and the front side of the receiving tray (4).
7. A multi-stage purification device for treating waste gas from the production of phenylhydrazine hydrochloride according to claim 2, characterized in that: The bottom of the circulating pump (28) is fixedly connected to a reinforcing base (9), and the surface of the reinforcing base (9) is coated with an anti-corrosion coating.
8. A multi-stage purification device for treating waste gas from phenylhydrazine hydrochloride production according to claim 2, characterized in that: Three Pall rings (10) are fixedly connected to the inner side of the purification tower (21), and the surface of the Pall rings (10) is coated with anti-corrosion paint.