Multi-stage purification and recovery device for waste gas generated in production of acrylic resin

Abstract

The utility model discloses a multistage purification and recovery device for waste gas in acrylic resin production, which is applied to the technical field of acrylic resin production and comprises a box body, a cyclone dust collector is bolted on one side of the box body, and a connecting pipe is fixedly communicated between the box body and the cyclone dust collector. And the side, away from the box body, of the cyclone dust collector fixedly communicates with a waste gas inlet valve, and a sealing cover is arranged at the top of the box body. Internal particulate matters are separated from waste gas through the cyclone dust collector, and after the waste gas enters the box body, internal VOCs and acid gas can be purified through the zeolite molecular sieve plate and the limestone sieve plate in sequence. The waste gas can be subjected to multi-stage purification treatment, and the purification treatment efficiency of the waste gas is improved. And the threaded shaft is rotated to drive the sealing cover to move upwards, so that the zeolite molecular sieve plate and the limestone sieve plate can be uniformly taken out from the interior of the box body, and the adsorbent can be conveniently replaced. Meanwhile, the taken adsorbent is recycled, so that the practicability is improved.

Description

Technical Field

[0001] This utility model belongs to the field of acrylic resin production technology, and specifically relates to a multi-stage purification and recovery device for acrylic resin production waste gas. Background Technology

[0002] Acrylic resin is a high molecular polymer produced by the polymerization reaction of acrylates, methacrylates and their derivatives. During the production process, some harmful waste gases are generated through chemical reactions and physical volatilization.

[0003] Currently, Chinese utility model patent CN221359167U discloses a multi-stage waste gas purification device. The waste gas typically generated during the production of acrylic resin generally consists of volatile organic compounds (VOCs), acidic gases, and particulate matter. Generally, particulate matter is separated using a cyclone dust collector or bag filter, followed by VOCs capture using activated carbon and zeolite molecular sieves, and finally, acidic gases are adsorbed by a dry limestone adsorption process. Because these purification steps require the waste gas to flow sequentially through pipelines within these devices, the flow of waste gas within the pipelines not only reduces the purification efficiency but also makes it inconvenient to uniformly remove and replace the activated carbon, zeolite molecular sieves, or limestone between the devices, thus making recycling cumbersome. Utility Model Content

[0004] The purpose of this invention is to provide a multi-stage purification and recovery device for waste gas from acrylic resin production. Its advantages are improved waste gas purification efficiency and the ability to easily remove, replace, and recycle zeolite molecular sieves or limestone.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a multi-stage purification and recovery device for waste gas from acrylic resin production, comprising a housing, a cyclone dust collector bolted to one side of the housing, a connecting pipe fixedly connected between the housing and the cyclone dust collector, a waste gas inlet valve fixedly connected to the side of the cyclone dust collector away from the housing, a sealing cover provided on the top of the housing, baffles welded to both sides of the bottom of the sealing cover, ventilation holes opened inside the baffles, and zeolite molecular sieve plates and limestone sieve plates respectively provided on both sides of the bottom of the sealing cover.

[0006] Using the above technical solution, after the waste gas is separated into internal particulate matter by a cyclone dust collector and enters the chamber, it can sequentially pass through zeolite molecular sieve plates and limestone sieve plates to purify internal VOCs and acidic gases. This allows for multi-stage purification of the waste gas, improving its purification efficiency. By rotating the threaded shaft, the sealing cover can be moved upwards, allowing both the zeolite molecular sieve plates and limestone sieve plates to be removed from the chamber. This not only facilitates the replacement of the adsorbent but also allows for the recovery of the removed adsorbent, improving its practicality.

[0007] The present invention is further configured such that: a partition plate welded to the inside of the housing is provided between the two baffles, the partition plate has a through groove inside, a fixed column that is slidably connected to the sealing cover is welded to the top of the partition plate, a threaded shaft is rotatably connected inside the fixed column, and a threaded sleeve welded to the sealing cover is threaded onto the surface of the threaded shaft.

[0008] Using the above technical solution, the zeolite molecular sieve plate and limestone sieve plate can be removed from the inside of the box, which not only facilitates the replacement of the adsorbent, but also allows for the recycling of the removed adsorbent.

[0009] The present invention is further configured such that an air outlet valve is fixedly connected to the bottom of the box on the side away from the cyclone dust collector.

[0010] The above technical solution is used to discharge the purified exhaust gas into the chamber. If the purified gas still contains other harmful substances such as nitrogen oxides, it can also be connected to a corresponding purification device for secondary purification treatment.

[0011] The present invention is further configured such that a sealing gasket, which works in conjunction with the sealing cap, is adhered to the top of both the box body and the partition.

[0012] By adopting the above technical solution, the sealing performance of the sealing cover when it is closed on the top of the box is improved, preventing gas leakage.

[0013] The present invention is further configured such that: a handwheel is bolted to the top of the threaded shaft and rotates through the fixed column.

[0014] Using the above technical solution, rotating the handwheel causes the threaded shaft to engage with the threaded sleeve, thereby causing the sealing cover to slide up and down.

[0015] The present invention is further configured such that an inspection door is opened and bolted to the other side of the surface of the box.

[0016] By adopting the above technical solution, the interior of the cabinet can be opened when not in use, making it convenient to clean and maintain the interior of the cabinet.

[0017] The present invention is further configured such that the zeolite molecular sieve plate and the limestone sieve plate are respectively bolted to the side of the baffle close to the cyclone dust collector.

[0018] By adopting the above technical solution, zeolite molecular sieve plates and limestone sieve plates are used to purify the waste gas entering the chamber in sequence, thereby improving the purification efficiency.

[0019] In summary, this utility model has the following beneficial effects:

[0020] 1. After the waste gas is separated into internal particulate matter by a cyclone dust collector and enters the housing, it can sequentially pass through zeolite molecular sieve plates and limestone sieve plates to purify internal VOCs and acidic gases. This allows for multi-stage purification of the waste gas, improving its purification efficiency.

[0021] 2. By rotating the threaded shaft, the sealing cover can be moved upwards, allowing both the zeolite molecular sieve plate and the limestone sieve plate to be removed from the inside of the housing. This not only facilitates the replacement of the adsorbent but also enables the recovery of the removed adsorbent, improving its practicality. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0024] Figure 3 This is a utility model Figure 2 Enlarged view of point A in the image.

[0025] Reference numerals in the attached diagram: 1. Housing; 2. Cyclone dust collector; 3. Connecting pipe; 4. Sealing cover; 5. Baffle; 6. Ventilation hole; 7. Zeolite molecular sieve plate; 8. Limestone sieve plate; 9. Partition; 10. Through groove; 11. Exhaust gas inlet valve; 12. Fixed column; 13. Threaded shaft; 14. Threaded sleeve; 15. Exhaust valve; 16. Sealing gasket; 17. Handwheel; 18. Inspection door. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings.

[0027] Example 1:

[0028] refer to Figure 1 , Figure 2 , Figure 3A multi-stage purification and recovery device for acrylic resin production waste gas includes a housing 1. A cyclone dust collector 2 is bolted to one side of the housing 1, and a connecting pipe 3 is fixedly connected between the housing 1 and the cyclone dust collector 2. A waste gas inlet valve 11 is fixedly connected to the side of the cyclone dust collector 2 away from the housing 1. A sealing cover 4 is provided on the top of the housing 1. Baffles 5 are welded to both sides of the bottom of the sealing cover 4. Ventilation holes 6 are opened inside the baffles 5. Zeolite molecular sieve plates 7 and limestone sieve plates 8 are respectively provided on both sides of the bottom of the sealing cover 4. After the waste gas is separated into internal particulate matter by the cyclone dust collector 2 and enters the housing 1, it can sequentially pass through the zeolite molecular sieve plates 7 and limestone sieve plates 8 to purify the internal VOCs and acidic gases. This allows for multi-stage purification of the waste gas, improving the purification efficiency.

[0029] refer to Figure 2 An exhaust valve 15 is fixedly connected to the bottom of the housing 1 on the side away from the cyclone dust collector 2. This valve is used to discharge the purified exhaust gas into the housing 1. If the purified gas still contains nitrogen oxides or other harmful substances, it can be connected to a corresponding purification device for secondary purification.

[0030] refer to Figure 1 An inspection door 18 is opened and bolted to the other side of the surface of the enclosure 1. The interior of the enclosure 1 can be opened when not in use, so as to facilitate cleaning and maintenance of the interior of the enclosure 1.

[0031] refer to Figure 2 Zeolite molecular sieve plate 7 and limestone sieve plate 8 are respectively bolted to the side of baffle 5 near cyclone dust collector 2. The zeolite molecular sieve plate 7 and limestone sieve plate 8 are used to purify the exhaust gas entering the chamber 1 in sequence, thereby improving the purification efficiency.

[0032] Brief description of the usage process: By connecting the exhaust gas inlet valve 11 to the exhaust port of the suction hood, the exhaust gas produced by acrylic resin production can be concentrated and drawn into the exhaust gas inlet valve 11. Then, the particulate matter in the exhaust gas is separated by the cyclone dust collector 2, and the exhaust gas enters the interior of the housing 1 through the connecting pipe 3. The particulate matter falls to the bottom of the cyclone dust collector 2 and is discharged. Afterwards, the exhaust gas flows inside the housing 1. When it passes through the ventilation holes 6 inside the baffle 5, the zeolite molecular sieve plate 7 and the limestone sieve plate 8 purify the exhaust gas in sequence. The zeolite molecular sieve plate 7 can capture VOCs in the exhaust gas, while the limestone sieve plate 8 can adsorb acidic gases in the exhaust gas, thus performing multi-stage purification treatment on the exhaust gas.

[0033] Example 2:

[0034] refer to Figure 1 , Figure 2 , Figure 3A multi-stage purification and recovery device for acrylic resin production waste gas is disclosed. A partition 9, welded to the interior of a housing 1, is positioned between two baffles 5. The partition 9 has an internal through-slot 10. A fixed column 12, slidably connected to a sealing cover 4, is welded to the top of the partition 9. A threaded shaft 13 is rotatably connected inside the fixed column 12, and a threaded sleeve 14, welded to the sealing cover 4, is threaded onto the surface of the threaded shaft 13. By rotating the threaded shaft 13, the sealing cover 4 moves upward, allowing the zeolite molecular sieve plate 7 and limestone sieve plate 8 to be removed from the housing 1. This facilitates adsorbent replacement and allows for the recovery of the removed adsorbent, improving practicality.

[0035] refer to Figure 2 , Figure 3 Both the top of the housing 1 and the partition 9 are bonded with sealing gaskets 16 that work in conjunction with the sealing cover 4. This improves the sealing performance of the sealing cover 4 when it is placed on the top of the housing 1, preventing gas leakage.

[0036] refer to Figure 1 , Figure 2 A handwheel 17, which is rotatably connected to the fixed post 12, is bolted to the top of the threaded shaft 13. By rotating the handwheel 17, the threaded shaft 13 engages with the threaded sleeve 14, thereby causing the sealing cover 4 to slide up and down.

[0037] Brief description of the usage process: By rotating the threaded shaft 13 and engaging the threaded sleeve 14, the sealing cover 4 slides upward on the surface of the fixed column 12, thereby causing the baffle 5 to slide out of the box 1. At this time, the zeolite molecular sieve plate 7 and the limestone sieve plate 8 can be easily replaced. Then, the threaded shaft 13 is rotated in the opposite direction to re-close the sealing cover 4 on the top of the box 1, and the self-locking fixation is achieved by the friction of the thread engagement. The recovered zeolite molecular sieve plate 7 can be desorbed with hot nitrogen and then condensed to recover high-purity solvents such as toluene and ethyl acetate, while the recovered limestone sieve plate 8 can be used in cement admixture production.

[0038] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A multi-stage purification and recovery device for acrylic resin production waste gas, comprising a housing (1), characterized in that: A cyclone dust collector (2) is bolted to one side of the housing (1). A connecting pipe (3) is fixedly connected between the housing (1) and the cyclone dust collector (2). An exhaust gas inlet valve (11) is fixedly connected to the side of the cyclone dust collector (2) away from the housing (1). A sealing cover (4) is provided on the top of the housing (1). Baffles (5) are welded to both sides of the bottom of the sealing cover (4). Ventilation holes (6) are opened inside the baffles (5). Zeolite molecular sieve plates (7) and limestone sieve plates (8) are respectively provided on both sides of the bottom of the sealing cover (4).

2. The multi-stage purification and recovery device for acrylic resin production waste gas according to claim 1, characterized in that: A partition (9) welded to the inside of the housing (1) is provided between the two baffles (5). A through groove (10) is opened inside the partition (9). A fixed column (12) that is slidably connected to the sealing cover (4) is welded to the top of the partition (9). A threaded shaft (13) is rotatably connected inside the fixed column (12). A threaded sleeve (14) that is welded to the sealing cover (4) is threaded onto the surface of the threaded shaft (13).

3. The multi-stage purification and recovery device for acrylic resin production waste gas according to claim 1, characterized in that: An exhaust valve (15) is fixedly connected to the bottom of the housing (1) on the side away from the cyclone dust collector (2).

4. The multi-stage purification and recovery device for acrylic resin production waste gas according to claim 2, characterized in that: The top of both the box (1) and the partition (9) is bonded with a sealing gasket (16) that works in conjunction with the sealing cover (4).

5. The multi-stage purification and recovery device for acrylic resin production waste gas according to claim 2, characterized in that: The top of the threaded shaft (13) is bolted with a handwheel (17) that is rotatably connected to the fixed column (12).

6. The multi-stage purification and recovery device for acrylic resin production waste gas according to claim 1, characterized in that: An inspection door (18) is opened and bolted to the other side of the surface of the housing (1).

7. The multi-stage purification and recovery device for acrylic resin production waste gas according to claim 1, characterized in that: The zeolite molecular sieve plate (7) and limestone sieve plate (8) are respectively bolted to the side of the baffle (5) near the cyclone dust collector (2).

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