A tail gas recovery device for PET production

Abstract

The utility model relates to the technical field of PET production, and specifically to an exhaust gas recovery device for PET production, comprising: a tank body, a partition plate is arranged in the tank body, a plurality of groups of filter screens are arranged on the surface of the partition plate, and a top cover is arranged on the top of the tank body; the beneficial effect is that the top cover and the tank body adopt a split design, when it is necessary to replace the filter filler, the two groups of screw sleeves rotate at the same time, and the screw rod cannot rotate under the action of the guide groove and the guide rail, so under the action of the threaded connection between the screw sleeve and the screw rod, the screw rod moves upward and extends out of the screw rod groove, and at the same time pushes the top cover upward, so that the partition plate and the filter screen fixed on the surface of the partition plate gradually extend out of the tank body from the top of the tank body, so that the side of the filter filler filled on the top of the filter screen is exposed to the outside, and large equipment can be used to directly unload and then the new filter filler can be spread on the top of the filter screen by the large equipment, thereby avoiding the efficiency and safety problems caused by workers working in a closed tank body.

Description

Technical Field

[0001] The utility model relates to the field of PET production, in particular to a tail gas recovery device used for PET production. Background Art

[0002] PET (polyethylene terephthalate) is a widely used engineering plastic and fiber material. Its production process is complex and involves chemical reactions in multiple stages. A large amount of exhaust gas will be generated during the production of PET. These exhaust gases may contain unreacted monomers and low-polymerization PET, as well as catalysts and diluents used. If these substances are not effectively filtered and treated, they will not only pollute the environment, but may also affect production efficiency and product quality.

[0003] In the prior art, a patent document with application number CN201320247301.5 reviewed and published by the State Intellectual Property Office of China discloses a tail gas recovery device for PET production, including a tank body and a partition, wherein a filter filler is installed in the cavity of the tank body, and a liquid outlet is provided at the bottom of the tank body; the partition is arranged in the tank body and divides the internal space of the tank body into an air inlet area and an air outlet area, the top of the partition is sealed and connected to the inner wall of the top of the tank body, and a gap is left on the inner wall of the bottom of the tank body at the bottom end, the opening of the air inlet area at the top of the tank body forms an air inlet, and the opening of the air outlet area at the top of the tank body forms an air outlet. The utility model also discloses a PET tail gas treatment system. Compared with the prior art, the utility model has the advantages of effectively controlling the emission of tail gas, reducing the unit consumption of raw materials, and saving costs.

[0004] However, in the prior art, when the filter packing needs to be replaced, the exhaust gas recovery device used for PET production can only be loaded manually into the tank body and then lifted out by a crane because the tank body and the top cover are integrated and there are only narrow air inlet and exhaust ports to enter the tank body. In addition, the volume of the container used for loading the filter packing is relatively small due to the limitation of the air inlet and exhaust ports, which not only leads to very slow progress in the replacement of the filter packing but also easily leads to poisoning of workers in the tank body due to the influence of residual exhaust gas in the tank. Utility Model Content

[0005] The purpose of the utility model is to provide a tail gas recovery device for PET production to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tail gas recovery device for PET production, comprising: a tank body, a partition plate is arranged in the tank body, a plurality of filter screens are arranged on the surface of the partition plate, a top cover is arranged on the top of the tank body, a screw groove is opened on the top of the tank body, a screw is movably inserted in the screw groove, a screw sleeve hole is opened on the inner wall of the screw groove, a screw sleeve is rotatably connected in the screw sleeve hole,

[0007] The screw sleeve is sleeved on the surface of the screw rod, and the top end of the screw rod is fixed on the bottom end of the top cover.

[0008] Preferably, the screws are provided in two groups, and the two groups of screws are symmetrically distributed about the tank body.

[0009] Preferably, the screw sleeve hole is provided with an opening on the side of the tank body, a motor is fixed on the side of the tank body, a driving gear is fixed on the transmission shaft of the motor, a passive gear is sleeved on the surface of the screw sleeve, and the driving gear is meshed with the passive gear.

[0010] Preferably, the diameter of the screw is smaller than the diameter of the screw groove, and the screw sleeve is an annular cylindrical structure.

[0011] The inner ring of the screw sleeve is provided with threads which match the threads of the screw rod.

[0012] Preferably, a stop plate is fixed to the bottom end of the screw rod, the stop plate is a circular plate structure, and the diameter of the stop plate is equal to the diameter of the groove body of the screw rod groove.

[0013] Preferably, guide grooves are provided on the surfaces of the screw and the screw groove, and guide rails are provided on the inner wall of the groove body of the screw groove, and the guide rails are slidably connected in the guide grooves.

[0014] Preferably, the partition is fixed on the bottom surface of the top cover, and filter fillers are arranged on the top ends of the plurality of groups of filter screens.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The tail gas recovery device for PET production proposed by the utility model adopts a split design for the top cover and the tank body. When the filter filler needs to be replaced, the two sets of screw sleeves rotate at the same time, and the screw cannot rotate under the action of the guide groove and the guide rail. Therefore, under the action of the threaded connection between the screw sleeve and the screw, the screw moves upward and extends out of the screw groove, and at the same time pushes the top cover upward, so that the partition and the filter screen fixed on the surface of the partition gradually extend out of the tank body from the top of the tank body, so that the side of the filter filler loaded on the top of the filter screen is exposed to the outside, and large equipment can be used to directly unload it and then the new filter filler can be spread on the top of the filter screen by the large equipment, avoiding the efficiency and safety problems caused by workers working in a closed tank body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 3 for Figure 2 A schematic diagram of the structure enlargement in the middle;

[0020] Figure 4 It is a schematic diagram of the cross-sectional structure of the guide groove;

[0021] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point B in the middle.

[0022] In the figure: tank body 1, top cover 2, partition 3, filter screen 4, screw groove 5, screw 6, screw sleeve hole 7, screw sleeve 8, passive gear 9, active gear 10, motor 11, guide rail 12, stop plate 13, guide groove 14. DETAILED DESCRIPTION

[0023] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1

[0025] See also Figure 1-Figure 5 The utility model provides a technical solution: a tail gas recovery device for PET production, comprising: a tank body 1, a partition 3 is arranged in the tank body 1, a plurality of filter screens 4 are arranged on the surface of the partition 3, a top cover 2 is arranged on the top of the tank body 1, a screw groove 5 is opened on the top of the tank body 1, a screw 6 is movably inserted in the screw groove 5, a screw sleeve hole 7 is opened on the inner wall of the screw groove 5, a screw sleeve 8 is rotatably connected in the screw sleeve hole 7, and the screw sleeve 8 is sleeved on the surface of the screw 6 The top end of the screw 6 is fixed to the bottom end of the top cover 2, two groups of screws 6 are provided, and the two groups of screws 6 are symmetrically distributed about the tank body 1. Guide grooves 14 are provided on the surfaces of the screws 6 and the screw grooves 5, and guide rails 12 are provided on the inner wall of the groove body of the screw groove 5. The guide rails 12 are slidably connected in the guide grooves 14. The inner ring of the screw sleeve 8 is provided with threads and cooperates with the threads of the screw 6. The partition 3 is fixed on the bottom end surface of the top cover 2, and the top ends of several groups of filter screens 4 are provided with filter fillers.

[0026] When the filter packing is replaced, the two sets of screw sleeves 8 rotate at the same time, while the screw rod 6 cannot rotate under the action of the guide groove 14 and the guide rail 12. Therefore, under the threaded connection between the screw sleeve 8 and the screw rod 6, the screw rod 6 moves upward and extends out of the screw groove 5, and the top cover 2 is pushed upward, so that the partition plate 3 and the filter screen 4 fixed on the surface of the partition plate 3 gradually extend out of the tank body 1 from the top end of the tank body 1, so that the side of the filter packing loaded on the top end of the filter screen 4 is exposed to the outside, and large equipment can be used to directly unload it and then large equipment can be used to spread new filter packing on the top end of the filter screen 4, avoiding efficiency and safety problems caused by workers working in a closed tank body. After the filter packing is replaced, it is only necessary to rotate the screw sleeve 8 in the opposite direction to retract the screw rod 6 into the screw groove 5, so that the top cover 2 is buckled on the top end of the tank body 1 again to seal the tank body 1.

[0027] Embodiment 2

[0028] On the basis of Example 1, in order to enable the screw sleeve 8 to rotate, the screw sleeve hole 7 is provided with an opening on the side of the tank body 1, a motor 11 is fixed to the side of the tank body 1, a driving gear 10 is fixed on the transmission shaft of the motor 11, and a passive gear 9 is sleeved on the surface of the screw sleeve 8, and the driving gear 10 is meshed with the passive gear 9.

[0029] When the screw sleeve 8 needs to rotate, the two motors 11 are powered on at the same time to drive the driving gear 10 to rotate, and the driving gear 10 drives the passive gear 9 in the screw sleeve hole 7 to rotate, so that the passive gear 9 drives the screw sleeve 8 to rotate.

[0030] Embodiment 3

[0031] On the basis of Example 2, in order to prevent the screw 6 from extending too long from the screw groove 5 and causing the top cover 2 to fall over, the diameter of the screw 6 is smaller than the diameter of the screw groove 5, the screw sleeve 8 is an annular cylindrical structure, and a stop plate 13 is fixed to the bottom end of the screw 6. The stop plate 13 is a circular plate structure, and the diameter of the stop plate 13 is equal to the diameter of the screw groove 5.

[0032] When the screw 6 moves upward, the stop plate 13 also moves upward with the screw 6. The screw 6 has the same diameter as the screw groove 5, and the screw 6 is smaller than the diameter of the screw groove 5. The inner ring of the screw sleeve 8 matches the screw 6, so the inner ring diameter of the screw sleeve 8 is smaller than the diameter of the stop plate 13. Therefore, when the screw 6 and the stop plate 13 rise together, when the stop plate 13 rests against the bottom end of the screw sleeve 8, the screw 6 can be stopped from continuing to rise, thereby preventing the screw 6 from extending too long from the screw groove 5, causing the top cover 2 to tip over.

[0033] In actual use, the tail gas recovery device for PET production has a split design for the top cover 2 and the tank body 1. When the filter filler needs to be replaced, the two sets of screw sleeves 8 rotate at the same time, while the screw 6 cannot rotate under the action of the guide groove 14 and the guide rail 12. Therefore, under the threaded connection between the screw sleeve 8 and the screw 6, the screw 6 moves upward and extends out of the screw groove 5, and at the same time pushes the top cover 2 upward, so that the partition 3 and the filter screen 4 fixed on the surface of the partition 3 gradually extend out of the tank body 1 from the top of the tank body 1, so that the side of the filter filler loaded on the top of the filter screen 4 is exposed to the outside, and large-scale equipment can be used to directly unload it and then large-scale equipment can be used to spread new filter filler on the top of the filter screen 4, avoiding efficiency and safety problems caused by workers working in a closed tank body. After the filter filler is replaced, it is only necessary to rotate the screw sleeve 8 in the opposite direction to re-install the screw 6. When the screw sleeve 8 needs to be rotated, the two motors 11 are powered on at the same time to drive the active gear 10 to rotate, and the active gear 10 drives the passive gear 9 in the screw sleeve hole 7 to rotate, so that the passive gear 9 drives the screw sleeve 8 to rotate; when the screw rod 6 moves upward, the stop plate 13 also moves upward with the screw rod 6, and the screw rod 6 has the same diameter as the screw groove 5, and the screw rod 6 is smaller than the diameter of the screw groove 5. The inner ring of the screw sleeve 8 cooperates with the screw rod 6, so the inner ring diameter of the screw sleeve 8 is smaller than the diameter of the stop plate 13. Therefore, when the screw rod 6 and the stop plate 13 rise together, when the stop plate 13 abuts against the bottom end of the screw sleeve 8, the screw rod 6 can be stopped from continuing to rise, thereby preventing the screw rod 6 from extending out of the screw groove 5 too long to cause the top cover 2 to tip over.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tail gas recovery device for PET production, comprising: A tank body (1) is provided with a partition (3) in the tank body (1), and a plurality of groups of filter screens (4) are provided on the surface of the partition (3). The invention is characterized in that: a top cover (2) is provided at the top of the tank body (1), a screw groove (5) is provided at the top of the tank body (1), a screw (6) is movably inserted in the screw groove (5), a screw sleeve hole (7) is provided on the inner wall of the screw groove (5), a screw sleeve (8) is rotatably connected in the screw sleeve hole (7), the screw sleeve (8) is sleeved on the surface of the screw (6), and the top end of the screw (6) is fixed to the bottom end of the top cover (2).

2. A tail gas recovery device for PET production according to claim 1, characterized in that: The screw rods (6) are provided in two groups, and the two groups of screw rods (6) are symmetrically distributed with respect to the tank body (1).

3. The tail gas recovery device for PET production according to claim 1, characterized in that: The screw sleeve hole (7) is provided with an opening on the side of the tank body (1), a motor (11) is fixed on the side of the tank body (1), a driving gear (10) is fixed on the transmission shaft of the motor (11), a passive gear (9) is sleeved on the surface of the screw sleeve (8), and the driving gear (10) is meshed with the passive gear (9).

4. The tail gas recovery device for PET production according to claim 1, characterized in that: The diameter of the screw (6) is smaller than the diameter of the screw groove (5), the screw sleeve (8) is an annular cylindrical structure, and the inner ring of the screw sleeve (8) is provided with threads which match the threads of the screw (6).

5. A tail gas recovery device for PET production according to claim 4, characterized in that: A stop plate (13) is fixed to the bottom end of the screw (6), the stop plate (13) is a circular plate structure, and the diameter of the stop plate (13) is equal to the diameter of the screw groove (5).

6. A tail gas recovery device for PET production according to claim 5, characterized in that: The surfaces of the screw (6) and the screw groove (5) are both provided with guide grooves (14), the inner wall of the groove body of the screw groove (5) is provided with guide rails (12), and the guide rails (12) are slidably connected in the guide grooves (14).

7. The tail gas recovery device for PET production according to claim 1, characterized in that: The partition plate (3) is fixed on the bottom surface of the top cover (2), and filter fillers are arranged on the top ends of the plurality of groups of filter screens (4).

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