Polyvinyl chloride paste resin recycling and washing device
Through the design of the dual washing tower structure and circulation components, the problem of latex foam and latex blockage in the recovery exhaust gas in the production of polyvinyl chloride paste resin is solved, achieving efficient gas purification and safe and stable operation of the equipment.
Patent Information
- Application Number
- CN202422472335.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-10-14
AI Technical Summary
During the production process of polyvinyl chloride paste resin, recycling latex foam and latex entrained in the exhaust gas can easily cause pipeline blockage, threatening the normal operation of gas cabinets and compressors, reducing production efficiency and increasing equipment maintenance costs.
The dual washing tower structure is adopted, combining the circulation assembly, water inlet assembly and liquid level sensor, and alternately set through the spray pipe and wire mesh trap to achieve gas-liquid separation and multiple interception, removing latex foam and latex from the recovered gas, ensuring the continuity and effectiveness of the washing process.
It effectively removes latex foam and latex from the recycling gas, avoids pipeline blockage, ensures the normal operation of subsequent equipment, improves production efficiency and equipment safety, and reduces operating costs.
Smart Images
Figure CN223287830U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of polyvinyl chloride paste resin recovery, and particularly relates to a polyvinyl chloride paste resin recovery and washing device. Background Art
[0002] Due to its low processing cost, simple molds, flexible molding, and easy foaming properties, paste resins are widely used in the manufacturing of wallpaper, gloves, imitation leather, and conveyor belts. With the continuous innovation of PVC paste resin processing technology, market requirements for its performance are also increasing, driving the continuous advancement of production technology and processes. However, the production process of polyvinyl chloride paste resin, especially when recovering unreacted monomers after the polymerization reaction, faces a significant problem: latex foam and small amounts of latex are carried in the recovered exhaust gas. This foam easily accumulates and clogs the pipeline during the pressure relief and recovery process, causing obstruction of the compressor air intake filter, posing a threat to the normal operation of the gas cabinet and compressor. This not only reduces the overall production load but also increases the frequency and cost of equipment maintenance and overhaul. Therefore, solving this problem is of great significance for improving production efficiency and reducing costs. Utility Model Content
[0003] In response to the shortcomings of the existing technology, the utility model provides a polyvinyl chloride paste resin recovery and washing device, which effectively solves the problem that latex foam and latex entrained in the tail gas of paste resin recovery easily cause pipeline blockage, and reduces the threat to equipment such as gas cabinets and compressors.
[0004] The technical solutions provided by this utility model are as follows:
[0005] A polyvinyl chloride paste resin recovery and washing device comprises a first water washing tower and a second water washing tower, wherein the lower air inlet of the first water washing tower is connected to an air inlet pipe, and the top air outlet of the first water washing tower is connected to the lower air inlet of the second water washing tower through a first exhaust pipe; the top air outlet of the second water washing tower is connected to the air inlet of a compressor through a second exhaust pipe, and the air outlet of the compressor is connected to a gas cabinet through a pipeline; a first circulation component is provided on one side of the first water washing tower and a first water inlet component is provided on the other side, and a second circulation component is provided on one side of the second water washing tower and a second water inlet component is provided on the other side.
[0006] Furthermore, the first circulation component includes a first circulation pump and a first circulation pipe. The first circulation pump is connected to the first water washing tower through the first circulation pipe. Solenoid valves are respectively installed on the first circulation pipes on both sides of the first circulation pump.
[0007] Furthermore, the second circulation component includes a second circulation pump and a second circulation pipe. The second circulation pump is connected to the second water washing tower through the second circulation pipe. Solenoid valves are respectively installed on the second circulation pipes on both sides of the second circulation pump.
[0008] Furthermore, the first water inlet assembly includes a first water inlet pipe, a first solenoid valve and a first flow meter. The first solenoid valve and the first flow meter are both arranged on the first water inlet pipe, and the first solenoid valve is installed upstream of the first flow meter.
[0009] Furthermore, the first water inlet pipe downstream of the first flow meter is respectively connected to the first spray pipe a and the first spray pipe b, the first spray pipe a is connected to the upper part of the first water washing tower and extends into the interior thereof, and the first spray pipe b is connected to the middle part of the first water washing tower and extends into the interior thereof.
[0010] Furthermore, the second water inlet assembly includes a second water inlet pipe, a second solenoid valve and a second flow meter. The second solenoid valve and the second flow meter are both arranged on the second water inlet pipe, and the second solenoid valve is installed upstream of the second flow meter.
[0011] Furthermore, the second water inlet pipe downstream of the second flow meter is respectively connected to a second spray pipe a and a second spray pipe b, the second spray pipe a is connected to the upper part of the second water washing tower and extends into the interior thereof, and the second spray pipe b is connected to the middle part of the second water washing tower and extends into the interior thereof.
[0012] Furthermore, liquid level sensors are provided on the side walls near the top of the first water washing tower and the second water washing tower.
[0013] Furthermore, the first water washing tower and the second water washing tower are respectively provided with a first wire mesh collector and a second wire mesh collector from top to bottom, and the first water washing tower and the second water washing tower are respectively provided with a spray pipe a, a first wire mesh collector, a spray pipe b, and a second wire mesh collector 8 from top to bottom.
[0014] Furthermore, the bottoms of the first water washing tower and the second water washing tower are connected to the collection tank through a first discharge pipe and a second discharge pipe, respectively.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] (1) The utility model provides a polyvinyl chloride paste resin recovery and washing device, which removes latex foam and latex in the recovered gas by water washing. The gas to be recovered first passes through a first water washing tower for preliminary washing to remove most impurities, and then the purified gas enters a second water washing tower for secondary washing to further improve the cleanliness of the gas; and the spray pipes and wire mesh collectors in the water washing tower are alternately arranged, so that the foam and latex entrained in the gas to be recovered are intercepted, and at the same time, the gas-liquid separation and foam barrier elimination are played, thereby avoiding pipeline blockage and providing favorable conditions for subsequent equipment operation.
[0017] (2) The present invention is also provided with a circulation assembly, which includes a circulation pump and a circulation pipe, the main function of which is to maintain the water circulation in the water washing tower, ensuring the continuity and effectiveness of the water washing process. The circulation pump extracts water from the bottom of the water washing tower and re-injects it into the water washing tower through the circulation pipe, which can maintain the flow state of the water washing liquid and promote the effective removal of latex foam and latex in the gas to be recovered; and the solenoid valves on the pipes on both sides of the circulation pump can achieve more precise control as needed.
[0018] (3) The utility model is also provided with a water inlet assembly, which accurately controls the flow of the washing liquid in the washing tower through the coordinated action of the solenoid valve, the flow meter and the liquid level sensor, thereby ensuring the best washing effect in the washing tower and effectively removing the latex foam and latex in the gas to be recovered, thereby reducing the risk of pipeline blockage, ensuring the normal operation of subsequent equipment such as compressors and gas cabinets, and improving production efficiency and equipment safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a structural schematic diagram of a polyvinyl chloride paste resin recovery and washing device of the utility model;
[0020] Figure 2 For this utility model Figure 1 Schematic diagram of the structure of the medium water washing tower.
[0021] In the figure: 1 first water washing tower, 11 first water inlet pipe, 12 first solenoid valve, 13 first flow meter, 14 first spray pipe a, 15 first spray pipe b, 16 first circulation pump, 17 first circulation pipeline, 18 first exhaust pipe, 19 first discharge pipe, 20 air inlet pipe, 2 second water washing tower, 21 second water inlet pipe, 22 second solenoid valve, 23 second flow meter, 24 second spray pipe a, 25 second spray pipe b, 26 second circulation pump, 27 second circulation pipeline, 28 second exhaust pipe, 29 second discharge port, 3 compressor, 4 gas cabinet, 5 collection tank, 6 liquid level sensor, 7 first wire mesh trap, 8 second wire mesh trap. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention; in addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0024] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0025] The utility model provides a polyvinyl chloride paste resin recovery and washing device. The technical solution of the utility model is further described below with reference to the accompanying drawings:
[0026] See Figure 1 It can be seen that a polyvinyl chloride paste resin recovery and washing device includes a first water washing tower 1 and a second water washing tower 2. The lower air inlet of the first water washing tower 1 is connected to the air inlet pipe 20, and the top air outlet of the first water washing tower 1 is connected to the air inlet of the lower part of the second water washing tower 2 through the first exhaust pipe 18; the top air outlet of the second water washing tower 2 is connected to the air inlet of the compressor 3 through the second exhaust pipe 28, and the air outlet of the compressor 3 is connected to the gas cabinet 4 through a pipeline; a first circulation component is provided on one side of the first water washing tower 1, and a first water inlet component is provided on the other side, and a second circulation component is provided on one side of the second water washing tower 2, and a second water inlet component is provided on the other side.
[0027] It is worth noting that the gas to be recovered is first preliminarily cleaned by the first water washing tower 1 to remove most of the impurities, and then enters the second water washing tower 2 for secondary cleaning to further improve the cleanliness of the gas. Finally, the clean gas discharged from the second water washing tower 2 is compressed by the compressor 3 through the second exhaust pipe 28 and stored in the gas cabinet 4 for subsequent use. A cooler, filter, pressure regulating valve, flow meter, safety valve, check valve and other equipment are also arranged between the air outlet of the compressor 3 and the gas cabinet 4 to ensure that the gas entering the gas cabinet 4 is of appropriate temperature, clean and dry, and has stable pressure, and prevents gas backflow, thereby ensuring the safety and efficient operation of the system; the circulation component is responsible for reprocessing the used water washing liquid and returning it to the corresponding water washing tower for reuse, thereby improving the utilization rate of water resources and reducing environmental pollution; the water inlet component is used to replenish fresh water to the water washing tower to ensure the effectiveness of the washing process.
[0028] In the above embodiment, the first circulation assembly includes a first circulation pump 16 and a first circulation pipe 17. The first circulation pump 16 is connected to the first water scrubber 1 via the first circulation pipe 17. Solenoid valves are installed on the first circulation pipe 17 on both sides of the first circulation pump 16. The second circulation assembly includes a second circulation pump 26 and a second circulation pipe 27. The second circulation pump 26 is connected to the second water scrubber 2 via the second circulation pipe 27. Solenoid valves are installed on the second circulation pipe 27 on both sides of the second circulation pump 26.
[0029] It is worth noting that the above-mentioned circulation pump pumps the washing liquid collected at the bottom of the tower back into the washing tower, realizing the recycling of the washing liquid, reducing the consumption of fresh water and lowering the operating costs; at the same time, the recycled washing liquid can continuously contact with the recovered gas, enhancing the mass transfer effect during the washing process.
[0030] In the above embodiment, the first water inlet assembly includes a first water inlet pipe 11, a first solenoid valve 12 and a first flowmeter 13. The first solenoid valve 12 and the first flowmeter 13 are both arranged on the first water inlet pipe 11, and the first solenoid valve 12 is installed upstream of the first flowmeter 13; the first water inlet pipe 11 downstream of the first flowmeter 13 is respectively connected to the first spray pipe a 14 and the first spray pipe b 15, the first spray pipe a 14 is connected to the upper part of the first water washing tower 1 and extends into the interior thereof, and the first spray pipe b 15 is connected to the middle part of the first water washing tower 1 and extends into the interior thereof. The second water inlet assembly includes a second water inlet pipe 21, a second solenoid valve 22 and a second flow meter 23. The second solenoid valve 22 and the second flow meter 23 are both arranged on the second water inlet pipe 21, and the second solenoid valve 22 is installed upstream of the second flow meter 23; the second water inlet pipe 21 downstream of the second flow meter 23 is respectively connected to the second spray pipe a 24 and the second spray pipe b 25, the second spray pipe a 24 is connected to the upper part of the second water washing tower 2 and extends to its interior, and the second spray pipe b 25 is connected to the middle part of the second water washing tower 2 and extends to its interior.
[0031] It is worth noting that in the above embodiment, the solenoid valve is designed to automatically open or close according to system requirements, achieving precise control of the water inlet volume. The flow meter is used to monitor and control the amount of fresh water entering the water scrubber. The solenoid valve and flow rate work together to ensure a stable water supply within the water scrubber. Furthermore, by installing spray pipes a and b at different heights within the water scrubber, the water wash liquid can be sprayed in multiple layers within the scrubber, increasing the contact area between the recovered gas and the water wash liquid and improving the removal rate of latex foam and latex contained in the recovered gas.
[0032] See Figure 1 、 Figure 2 It can be seen that a liquid level sensor 6 is provided on the side wall near the top of the first water washing tower 1 and the second water washing tower 2 for real-time monitoring of the liquid level in the water washing tower; the first water washing tower 1 and the second water washing tower 2 are provided with a first wire mesh catcher 7 and a second wire mesh catcher 8 from top to bottom, and the first water washing tower 1 and the second water washing tower 2 are arranged from top to bottom in the spray pipe a, the first wire mesh catcher 7, the spray pipe 2, and the second wire mesh catcher 8.
[0033] It is worth noting that in the above embodiment, the spray pipes and the wire mesh collectors are arranged alternately. Through the combination of multiple sprays and wire mesh collectors, the latex foam and latex in the recovered gas can be intercepted multiple times, and the impurities in the recovered gas can be removed layer by layer, so that the gas discharged from the second water washing tower reaches a higher degree of cleanliness.
[0034] In the above embodiment, the bottoms of the first and second water scrubbers 1 and 2 are connected to the collection tank 5 via first and second discharge pipes 19 and 29, respectively. Foam and materials intercepted by the wire mesh traps within the scrubbers are washed and then discharged through outlet pipes at the bottoms of the scrubbers to the collection tank for recovery. Furthermore, to prevent explosions caused by the recycled gases within the scrubbers mixing with oxygen, inert gas exchange pipes are installed at the bottoms of the scrubbers to reduce the risk of combustible gases mixing with oxygen.
[0035] The working principle of the utility model is as follows: before starting washing, the staff uses nitrogen or other inert gas to replace the air in the water washing tower to reduce the oxygen content, and then introduces the washing liquid into the first water washing tower 1 and the second water washing tower 2 through the first water inlet pipe 11 and the second water inlet pipe 21. When the washing liquid in the water washing tower reaches the preset value, the liquid level sensor 6 located in the water washing tower transmits the real-time monitored liquid level information in the water washing tower to the controller, and the controller starts the circulation pump to circulate the water in the water washing tower. When the first water washing tower 1 and the second water washing tower 2 circulate, the water in the water washing tower 1 and the second water washing tower 2 are circulated. After stabilization, the recovered gas inlet pipe 20 at the lower part of the first water washing tower 1 is opened to allow the recovered gas to enter the tower from the bottom of the first water washing tower 1. The recovered gas rising in the first water washing tower 1 contacts the circulating water washing liquid in the tower through the first wire mesh collector 7 and the second wire mesh collector 8 to perform the first washing; at this time, if the liquid level of the water washing liquid in the first water washing tower 1 is lower than the set value, the liquid level sensor 6 will send the real-time monitored liquid level data to the controller, and the controller will open the first solenoid valve 11 to allow new water washing liquid to flow into the water washing tower until the liquid level returns to normal.
[0036] The recovered gas, after being scrubbed by the first water scrubber 1, flows into the second water scrubber 2 through the first exhaust pipe 18 at the top. Within the second water scrubber 2, the recovered gas passes through the first and second wire mesh traps 7 and 8 inside the scrubber, where it comes into contact with the circulating water wash liquid within the scrubber for secondary purification, further removing any residual latex impurities. The recovered gas, after being purified in the second water scrubber 2, passes through the second exhaust pipe 28 at the top of the scrubber, via the compressor 3, and is stored in the gas cabinet 4. The device provided by the utility model not only effectively purifies the recovered gas, but also ensures the efficient operation and safety performance of the entire system.
[0037] The above is a detailed introduction to a polyvinyl chloride paste resin recovery and washing device provided by the present invention. The above embodiments are only used to illustrate the technical solution of the present invention and are not limiting. Those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, and should be covered by the scope of the claims of the present invention.
Claims
1. A polyvinyl chloride paste resin recovery and washing device, comprising a first water washing tower (1) and a second water washing tower (2), characterized in that: The lower air inlet of the first water washing tower (1) is connected to an air inlet pipe (20), and the top air outlet of the first water washing tower (1) is connected to the lower air inlet of the second water washing tower (2) through a first exhaust pipe (18); the top air outlet of the second water washing tower (2) is connected to the air inlet of the compressor (3) through a second exhaust pipe (28), and the air outlet of the compressor (3) is connected to the gas cabinet (4) through a pipeline; a first circulation component is provided on one side of the first water washing tower (1) and a first water inlet component is provided on the other side; a second circulation component is provided on one side of the second water washing tower (2) and a second water inlet component is provided on the other side.
2. A polyvinyl chloride paste resin recovery and washing device according to claim 1, characterized in that: The first circulation component comprises a first circulation pump (16) and a first circulation pipe (17). The first circulation pump (16) is connected to the first water washing tower (1) through the first circulation pipe (17). Solenoid valves are respectively installed on the first circulation pipes (17) on both sides of the first circulation pump (16).
3. The polyvinyl chloride paste resin recovery and washing device according to claim 1, characterized in that: The second circulation component comprises a second circulation pump (26) and a second circulation pipe (27). The second circulation pump (26) is connected to the second water washing tower (2) through the second circulation pipe (27). Solenoid valves are respectively installed on the second circulation pipes (27) on both sides of the second circulation pump (26).
4. The polyvinyl chloride paste resin recovery and washing device according to claim 1, characterized in that: The first water inlet assembly comprises a first water inlet pipe (11), a first solenoid valve (12) and a first flow meter (13); the first solenoid valve (12) and the first flow meter (13) are both arranged on the first water inlet pipe (11); the first solenoid valve (12) is installed at an upstream position of the first flow meter (13).
5. The polyvinyl chloride paste resin recovery and washing device according to claim 4, characterized in that: The first water inlet pipe (11) downstream of the first flow meter (13) is connected to a first spray pipe a (14) and a first spray pipe b (15), respectively. The first spray pipe a (14) is connected to the upper part of the first water washing tower (1) and extends into the interior thereof. The first spray pipe b (15) is connected to the middle part of the first water washing tower (1) and extends into the interior thereof.
6. The polyvinyl chloride paste resin recovery and washing device according to claim 1, characterized in that: The second water inlet assembly comprises a second water inlet pipe (21), a second solenoid valve (22) and a second flow meter (23); the second solenoid valve (22) and the second flow meter (23) are both arranged on the second water inlet pipe (21); and the second solenoid valve (22) is installed upstream of the second flow meter (23).
7. The polyvinyl chloride paste resin recovery and washing device according to claim 6, characterized in that: The second water inlet pipe (21) downstream of the second flow meter (23) is connected to a second spray pipe a (24) and a second spray pipe b (25), respectively. The second spray pipe a (24) is connected to the upper part of the second water washing tower (2) and extends into the interior thereof. The second spray pipe b (25) is connected to the middle part of the second water washing tower (2) and extends into the interior thereof.
8. A polyvinyl chloride paste resin recovery and washing device according to any one of claims 1 to 7, characterized in that: Liquid level sensors (6) are provided on the side walls near the top of the first water washing tower (1) and the second water washing tower (2).
9. The polyvinyl chloride paste resin recovery and washing device according to claim 8, characterized in that: The first water washing tower (1) and the second water washing tower (2) are both provided with a first wire mesh collector (7) and a second wire mesh collector (8) in sequence from top to bottom, and the first water washing tower (1) and the second water washing tower (2) are provided with a spray pipe a, a first wire mesh collector (7), a spray pipe b, and a second wire mesh collector (8) in sequence from top to bottom.
10. The polyvinyl chloride paste resin recovery and washing device according to claim 1, characterized in that: The bottoms of the first water washing tower (1) and the second water washing tower (2) are connected to the collection tank (5) via a first discharge pipe (19) and a second discharge pipe (29), respectively.