Polyimide film production waste gas recovery treatment equipment

Abstract

The embodiment of the utility model provides polyimide film production waste gas recovery treatment equipment, and relates to the technical field of polyimide film production. The polyimide film production waste gas recovery treatment equipment comprises a support, an air inlet cylinder is installed in the support, a treatment box is arranged on the lower side of the support, a second-stage filter cylinder is fixedly arranged in the treatment box, a first-stage filter cylinder is rotationally arranged in the second-stage filter cylinder, and an air inlet pipe is arranged on the upper side of the first-stage filter cylinder. The first-stage filter cylinder and the second-stage filter cylinder are arranged in the treatment box, waste gas is secondarily filtered, the filtering effect is improved, meanwhile, the first gear and the second gear are meshed, the second gear drives the air inlet pipe to rotate, then the first-stage filter cylinder drives the annular brush to rotate, the arc brush on the outer side of the annular brush is used for cleaning the second-stage filter cylinder, and the waste gas treatment efficiency is improved. Meanwhile, the annular brush slides in the sliding rail, so that the cleaning area of the secondary filter cartridge is enlarged, and the waste gas filtering quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of polyimide film production, in particular to a polyimide film production waste gas recovery and treatment device. Background Art

[0002] The most common production method of polyimide film is to first polymerize diamine and dianhydride into polyamic acid (PAA) in a non-protonic high-polarity solvent, and then use aluminum foil method, cast method or stretching method to make polyamic acid into polyimide film (PI film). However, the waste gas generated by the production of polyimide film contains more harmful substances, and direct emission will increase pollution to the environment.

[0003] Chinese Patent Announcement No.: CN214982578U A high-temperature waste gas condensation recovery device for a polyimide film casting machine includes a base, a condensation box and a condenser are provided on the upper end face of the base through a first pillar, a filter box is provided on the upper end face of the condensation box through a second pillar, and a first wind hood is provided in the through groove of the upper end face of the filter box, a second wind hood is provided in the through groove of the lower end face of the filter box, a filter frame filled with activated carbon is provided inside the filter box, an induced draft fan is provided in the middle of the upper end face of the condensation box, one end of the induced draft fan is connected to the second wind hood, and the other end of the induced draft fan is connected to an air outlet pipe. In the utility model, when in use, this high-temperature waste gas condensation recovery device for a polyimide film casting machine can not only condense and recover the high-temperature waste gas generated by the production of polyimide film, but also filter it, thereby greatly reducing pollution to the environment.

[0004] From the above, it can be seen that in the prior art, activated carbon is used to purify the exhaust gas. However, since the exhaust gas also contains certain impurities, directly using activated carbon to purify the exhaust gas without filtering will reduce the quality of exhaust gas treatment. Of course, there is also a situation in the prior art where a filter is used to filter the exhaust gas. However, a single filter not only has a poor filtering effect, but also needs to be regularly disassembled and cleaned after a certain period of use, otherwise it will affect the filtering effect, making the operation cumbersome. Utility Model Content

[0005] The purpose of the utility model is to provide a polyimide film production waste gas recovery and treatment equipment, which can avoid the situation that the quality of waste gas treatment is reduced by directly using activated carbon to purify the waste gas without filtering. Of course, there is also a situation in the prior art that uses a filter to filter the waste gas, but a single filter not only has a poor filtering effect, but also needs to be regularly disassembled and cleaned after a certain period of use, otherwise it will affect the filtering effect.

[0006] The utility model provides a polyimide film production waste gas recovery and treatment equipment, comprising a bracket, an air inlet cylinder is installed inside the bracket, a treatment box is arranged on the lower side of the bracket, a secondary filter cartridge is fixedly arranged in the treatment box, a primary filter cartridge is rotatably arranged inside the secondary filter cartridge, an air inlet pipe is arranged on the upper side of the primary filter cartridge, the upper end of the air inlet pipe passes through the treatment box and is rotatably connected to the air outlet end of the air inlet cylinder, and a cleaning mechanism is slidably arranged on the outer side of the primary filter cartridge.

[0007] In a specific embodiment, the size of the filter mesh of the primary filter cartridge is larger than the size of the filter mesh of the secondary filter cartridge.

[0008] In a specific embodiment, the cleaning mechanism includes an annular brush sliding on the outside of the primary filter cartridge, and the bristles inside the annular brush fit into the mesh of the outer wall of the primary filter cartridge.

[0009] In a specific embodiment, a plurality of arc brushes are arranged on the outer side of the annular brush, and the bristles of the arc brushes fit with the mesh of the secondary filter cartridge.

[0010] In a specific embodiment, slide rails are symmetrically arranged on the outer side of the primary filter cartridge, a screw rod is rotatably arranged in one of the slide rails, and the screw rod is threadedly connected to one side of an annular brush sliding in the slide rail.

[0011] In a specific implementation manner, a second gear is connected to the outer side of the air inlet pipe, and a first gear is rotatably provided on the upper side of the processing box, and the first gear is meshed with the second gear.

[0012] In a specific implementation manner, a rotating rod 2 is provided at the center of the gear 1, and the upper end of the rotating rod 2 passes through the bracket and is connected to one end of the transmission member.

[0013] In a specific implementation manner, a rotating rod 1 is rotatably arranged in the air inlet cylinder, a stirring blade is arranged on the rotating rod 1, and the upper end of the rotating rod 1 is connected to the other end of the transmission member.

[0014] In a specific embodiment, an air outlet is provided on one side of the treatment box, and the air outlet is communicated with an opening provided on the lower side of the filter box. An exhaust port is provided on the upper side of the filter box.

[0015] In a specific embodiment, an activated carbon layer is provided in the filter box.

[0016] The embodiment of the utility model provides a polyimide film production waste gas recovery and treatment device, compared with the prior art:

[0017] 1. The utility model provides a primary filter cartridge and a secondary filter in a processing box to perform secondary filtration on the exhaust gas, thereby improving the filtration effect. At the same time, the meshing of gear one and gear two is utilized to make gear two rotate with the air inlet pipe, thereby making the primary filter cartridge rotate with the annular brush, so that the arc brush outside the annular brush cleans the secondary filter cartridge. At the same time, the sliding of the annular brush in the slide rail is utilized to expand the cleaning area of ​​the secondary filter cartridge, thereby improving the quality of exhaust gas filtration. Therefore, by cleaning the primary filter cartridge and the secondary filter cartridge during the filtration process, the step of regular disassembly is eliminated.

[0018] 2. The utility model drives the rotating rod 1 and the rotating rod 2 to rotate through the transmission member provided, so that the stirring blades can disperse the exhaust gas in the air inlet tube, thereby making it easier to filter the harmful substances in the exhaust gas. When the stirring blades rotate, the rotating rod 2 rotates with the gear 1, so as to achieve the purpose of rotating the primary filter cartridge and realize the purpose of cleaning the filter mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the following is a brief introduction to the drawings required for use in the implementation mode. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0021] Figure 2 This is a schematic cross-sectional view of the air inlet tube structure of an embodiment of the utility model;

[0022] Figure 3 It is a schematic cross-sectional view of the processing box structure of an embodiment of the utility model;

[0023] Figure 4 It is a schematic plan view of the processing box structure of an embodiment of the utility model;

[0024] Figure 5 This is a schematic diagram of the air outlet structure of an embodiment of the utility model;

[0025] Figure 6 This is a schematic diagram of the structure of a primary filter cartridge according to an embodiment of the utility model;

[0026] Figure 7 This is a schematic diagram of the structure of a processing box according to an embodiment of the utility model;

[0027] Figure 8 This is a schematic diagram of the structure of the stirring blade and the like according to an embodiment of the utility model.

[0028] icon:

[0029] 1. Bracket; 2. Air inlet; 3. Treatment box; 31. Air outlet; 4. Filter box; 41. Exhaust outlet; 42. Opening; 43. Activated carbon layer; 5. Rotating rod 1; 51. Stirring blade; 6. Transmission part; 61. Rotating rod 2; 62. Gear 1; 63. Gear 2; 7. Secondary filter cartridge; 8. Primary filter cartridge; 81. Air inlet pipe; 82. Slide rail; 83. Screw rod; 84. Annular brush; 85. Arc brush. DETAILED DESCRIPTION

[0030] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0031] Please refer to Figure 1-Figure 8 The embodiment of the utility model provides a polyimide film production waste gas recovery and treatment equipment, including a bracket 1, an air inlet cylinder 2 is installed inside the bracket 1, and an air inlet pipe is arranged on the air inlet cylinder 2 to introduce waste gas. A treatment box 3 is arranged on the lower side of the bracket 1, and a secondary filter cartridge 7 is fixedly arranged in the treatment box 3. A primary filter cartridge 8 is rotatably arranged inside the secondary filter cartridge 7, and an air inlet pipe 81 is arranged on the upper side of the primary filter cartridge 8. The upper end of the air inlet pipe 81 penetrates the treatment box 3 and is rotatably connected to the air outlet end of the air inlet cylinder 2. At the same time, the air inlet pipe 81 is rotatably connected to the treatment box 3. After the waste gas enters the primary filter cartridge 8 for filtration, it is filtered for the second time through the secondary filter cartridge 7.

[0032] Since an air outlet 31 is opened on one side of the treatment box 3, the air outlet 31 is connected to the opening 42 opened on the lower side of the filter box 4, and an activated carbon layer 43 is arranged in the filter box 4. After the filtered exhaust gas enters the filter box 4 from the opening 42, it is purified by the activated carbon layer 43 and discharged from the exhaust port 41 opened on the upper side of the filter box 4.

[0033] Among them, the size of the filter mesh of the first-level filter cartridge 8 is larger than the size of the filter mesh of the second-level filter cartridge 7. The first-level filter cartridge 8 filters larger impurities, and the second-level filter cartridge 7 performs secondary filtration on smaller impurities.

[0034] In order to improve the filtering effect of the primary filter cartridge 8 and the secondary filter cartridge 7, a cleaning mechanism is slidably arranged on the outer side of the primary filter cartridge 8, and the cleaning mechanism includes an annular brush 84 sliding on the outer side of the primary filter cartridge 8, and the bristles inside the annular brush 84 fit with the outer wall mesh of the primary filter cartridge 8. Slide rails 82 are symmetrically arranged on the outer side of the primary filter cartridge 8, and a screw rod 83 is rotatably arranged in one of the slide rails 82. The screw rod 83 is threadedly connected to one side of the annular brush 84 sliding in the slide rail 82, and the screw rod 83 is driven by a motor. When the screw rod 83 rotates, the annular brush 84 moves up and down to clean the mesh of the primary filter cartridge 8.

[0035] Furthermore, a gear 2 63 is connected to the outer side of the air inlet pipe 81, and a gear 1 62 is rotatably provided on the upper side of the processing box 3. The gear 1 62 is meshed with the gear 2 63 to make the gear 2 63 rotate with the primary filter cartridge 8. Since a plurality of arc brushes 85 are provided on the outer side of the annular brush 84, the bristles of the arc brush 85 fit with the mesh of the secondary filter cartridge 7. Therefore, when the primary filter cartridge 8 rotates, the arc brush 85 cleans the mesh of the secondary filter cartridge 7, and the sliding of the annular brush 84 in the slide rail 82 enables the arc brush 85 to expand the cleaning area of ​​the secondary filter cartridge 7.

[0036] In order to make gear 1 62 rotate, a rotating rod 2 61 is set at the center of gear 1 62. The upper end of the rotating rod 2 61 passes through the bracket 1 and is connected with one end of the transmission member 6. The transmission member 6 is driven by a motor. When the transmission member 6 is in operation, the rotating rod 2 61 can be rotated to achieve the purpose of rotating gear 1 62.

[0037] In addition, a rotating rod 5 is rotatably arranged in the air inlet tube 2, and a stirring blade 51 is arranged on the rotating rod 5. The upper end of the rotating rod 5 is connected to the other end of the transmission member 6. When the transmission member 6 is in operation, the rotating rod 5 is rotated at the same time, so that the stirring blade 51 stirs the exhaust gas in the air inlet tube 2 to break up the exhaust gas, expand the contact area between the exhaust gas and the primary filter cartridge 8, and improve the filtering effect. The transmission member 6 is two pulleys mounted on the upper ends of the rotating rod 5 and the rotating rod 2 61, and a belt mounted on the two pulleys.

[0038] In summary, the working principle of the waste gas recovery and treatment equipment for the production of polyimide film in the embodiment of the utility model is as follows: the waste gas enters from the air inlet duct of the air inlet cylinder 2, and is driven by the motor to drive the transmission part 6, so that the rotating rod 1 5 rotates with the stirring blade 51 to disperse the waste gas, and at the same time, the rotating rod 2 61 rotates with the gear 1 62, so that the gear 1 62 and the gear 2 63 are meshed, and then the primary filter cartridge 8 rotates. At this time, the waste gas is filtered by the primary filter cartridge 8 and discharged from the mesh of the secondary filter cartridge 7. The waste gas enters the filter box 4 from the opening 42 for purification, and the annular brush 84 and the arc brush 85 clean the primary filter cartridge 8 and the secondary filter cartridge 7.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A polyimide film production waste gas recovery and treatment device, comprising a bracket (1), characterized in that: An air inlet cylinder (2) is installed inside the bracket (1), a processing box (3) is arranged at the lower side of the bracket (1), a secondary filter cartridge (7) is fixedly arranged inside the processing box (3), a primary filter cartridge (8) is rotatably arranged inside the secondary filter cartridge (7), an air inlet pipe (81) is arranged on the upper side of the primary filter cartridge (8), the upper end of the air inlet pipe (81) passes through the processing box (3) and is rotatably connected to the air outlet end of the air inlet cylinder (2), and a cleaning mechanism is slidably arranged on the outer side of the primary filter cartridge (8).

2. The polyimide film production waste gas recovery and treatment equipment according to claim 1, characterized in that: The size of the filtering mesh of the primary filter cartridge (8) is greater than the size of the filtering mesh of the secondary filter cartridge (7).

3. The polyimide film production waste gas recovery and treatment equipment according to claim 1, characterized in that: The cleaning mechanism comprises an annular brush (84) sliding on the outside of the primary filter cartridge (8), and the bristles inside the annular brush (84) fit into the mesh of the outer wall of the primary filter cartridge (8).

4. The polyimide film production waste gas recovery and treatment equipment according to claim 3 is characterized in that: A plurality of arc brushes (85) are arranged on the outer side of the annular brush (84), and the bristles of the arc brushes (85) fit into the mesh of the secondary filter cartridge (7).

5. The polyimide film production waste gas recovery and treatment equipment according to claim 4, characterized in that: The outer side of the primary filter cartridge (8) is symmetrically provided with slide rails (82), a screw rod (83) is rotatably provided in one of the slide rails (82), and the screw rod (83) is threadedly connected to one side of an annular brush (84) sliding in the slide rail (82).

6. The polyimide film production waste gas recovery and treatment equipment according to claim 5, characterized in that: The outer side of the air inlet pipe (81) is connected to a second gear (63), and the upper side of the processing box (3) is rotatably provided with a first gear (62), and the first gear (62) is meshed with the second gear (63).

7. The polyimide film production waste gas recovery and treatment equipment according to claim 6, characterized in that: A rotating rod 2 (61) is arranged at the center of the gear 1 (62), and the upper end of the rotating rod 2 (61) passes through the bracket (1) and is connected to one end of the transmission member (6).

8. The polyimide film production waste gas recovery and treatment equipment according to claim 1 or 7, characterized in that: A rotating rod (5) is rotatably arranged in the air inlet cylinder (2), a stirring blade (51) is arranged on the rotating rod (5), and the upper end of the rotating rod (5) is connected to the other end of the transmission member (6).

9. The polyimide film production waste gas recovery and treatment equipment according to claim 1, characterized in that: An air outlet (31) is provided on one side of the processing box (3), and the air outlet (31) is communicated with an opening (42) provided on the lower side of the filter box (4), and an air exhaust port (41) is provided on the upper side of the filter box (4).

10. The polyimide film production waste gas recovery and treatment equipment according to claim 9, characterized in that: An activated carbon layer (43) is arranged in the filter box (4).

Images