Tail gas multi-stage spraying equipment for polyimide film production

Abstract

The utility model discloses tail gas multi-stage spraying equipment for polyimide film production, which comprises a tower body, a gas inlet, a gas outlet and an access hole which are distributed on the tower body, a spraying water tank arranged on the outer side of the tower body, and a multi-stage spraying structure arranged on the inner side of the tower body, wherein the interior of the tower body is sequentially divided into a gas inlet cavity, a pre-filtering cavity, a spraying cavity A, a spraying cavity B and a gas outlet cavity from bottom to top through separation net frames, a gas inlet and a gas outlet are formed in the gas inlet cavity and the gas outlet cavity respectively, and the gas inlet is communicated with a waste gas outlet of a film salivation production line; the multi-stage spraying structure can be connected with the output side of the spraying water tank through a plurality of pipelines. The spraying assembly A and the spraying assembly B are correspondingly arranged in the spraying cavity A and the spraying cavity B respectively, waste gas passes through the spraying cavity A to the spraying cavity B and then is exhausted, a spraying structure capable of swinging and rotating is used in the spraying cavity A, the spraying range is wider, the position can be adjusted according to the flow of the waste gas, and the waste gas can make full contact with spraying liquid.

Description

Technical Field

[0001] This utility model relates to the field of polyimide film production, specifically to a multi-stage exhaust gas spraying device for polyimide film production. Background Technology

[0002] Polyimide, as a high-performance material, possesses excellent properties such as high temperature resistance, corrosion resistance, radiation resistance, and high strength, and is widely used in the production of films. However, the production process of polyimide films generates many harmful exhaust gases, especially during the casting process and high-temperature imidization, which produce mixed exhaust gases containing dimethylacetamide (DMAC) solvent. DMAC-containing exhaust gases are low-toxicity but highly irritating gases; direct emission into the atmosphere will pollute the air and soil.

[0003] Currently, the main treatment for exhaust gas from the drooping stage is using spray towers to purify it. However, most spray towers are single-layer sprayers, which have a small spray range and cannot effectively ensure sufficient contact between the exhaust gas and the spray liquid. Therefore, this invention proposes a multi-stage spraying device for exhaust gas in polyimide film production. This multi-stage spraying device has spray components A and B respectively configured in spray chambers A and B. The exhaust gas passes through spray chamber A to spray chamber B before being discharged. Spray chamber A utilizes a swingable and rotatable spray structure, resulting in a wider spray range and adjustable position according to the exhaust gas flow rate, ensuring sufficient contact between the exhaust gas and the spray liquid. Spray component B uses a cross-shaped direct spray structure, which can quickly flush away harmful substances or impurities in the exhaust gas, improving the quality of exhaust gas treatment. Utility Model Content

[0004] The purpose of this invention is to provide a multi-stage exhaust gas spraying device for polyimide film production, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage spraying device for exhaust gas in polyimide film production, comprising a tower body, an air inlet, an air outlet, an inspection port distributed on the tower body, a spraying water tank arranged on the outside of the tower body, and a multi-stage spraying structure arranged on the inside of the tower body. The tower body is divided from bottom to top by a partition frame into an air inlet chamber, a pre-filtration chamber, a spraying chamber A, a spraying chamber B, and an air outlet chamber. The air inlet and air outlet are located on the air inlet and air outlet chambers, respectively. The air inlet is connected to the exhaust gas outlet of the film casting production line. The multi-stage spraying structure can be connected to the output side of the spraying water tank via multiple pipelines. The multi-stage spraying structure includes spraying component A and spraying component B, which are respectively configured in spraying chamber A and spraying chamber B. Spraying component B is a cross-shaped spray frame with multiple nozzles arranged on it.

[0006] Preferably, the spray assembly A is a multi-angle spray frame. The spray assembly A includes a first motor, a bevel gear transmission box, a rotating support, a rotating frame, a second motor, a first connecting arm, a second connecting arm, an electric push rod, a base frame, a rotating plate, and a spray support. The shaft end of the first motor is connected to the bevel gear transmission box, and the rotating support is connected to the lower side of the bevel gear transmission box.

[0007] Preferably, a second motor is provided on the outer side of the rotating support, and a rotating frame connected to the shaft end of the second motor is provided on the inner side of the rotating support. The front end and the rear end of the rotating frame are respectively movably connected to the first connecting arm and the second connecting arm.

[0008] Preferably, the lower ends of the first connecting arm and the second connecting arm are movably connected to the rear end and the middle of the base frame, respectively. An electric actuator is installed on the inner side of the first connecting arm through a pin seat, and the front end of the electric actuator is connected to a rotating plate.

[0009] Preferably, the rotating plate is rotatably connected to the front end of the base frame, and a spray support is installed on the rotating plate. The rotating plate can drive the spray support to swing when the second motor and electric push rod are started.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] The multi-stage spraying device of this utility model is equipped with spraying component A and spraying component B respectively, which are configured in spraying chamber A and spraying chamber B. The exhaust gas passes through spraying chamber A and spraying chamber B and is then discharged. Spraying chamber A utilizes a swingable and rotatable spraying structure, which has a wider spraying range and can be adjusted according to the flow rate of the exhaust gas, so that the exhaust gas can fully contact the spraying liquid. Spraying component B adopts a cross-shaped direct spraying structure, which can quickly flush away harmful substances or impurities in the exhaust gas and improve the quality of exhaust gas treatment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the internal structure of the tower body of this utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the spray assembly B in this embodiment of the present invention;

[0015] Figure 4 This is a schematic diagram of the structure of the spray assembly A in an embodiment of this utility model.

[0016] In the diagram: 1. Tower body; 2. Spray water tank; 3. Partition frame; 4. Air inlet chamber; 5. Pre-filter chamber; 6. Spray chamber A; 7. Spray chamber B; 8. Spray assembly B; 9. First motor; 10. Bevel gear transmission box; 11. Rotating support; 12. Rotating frame; 13. Second motor; 14. First connecting arm; 15. Second connecting arm; 16. Electric push rod; 17. Base frame; 18. Rotating plate; 19. Spray support. Detailed Implementation

[0017] 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 making creative efforts are within the scope of protection of the present invention.

[0018] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] Please see Figure 1-4This utility model provides a technical solution: a multi-stage spraying device for exhaust gas in polyimide film production, comprising a tower body 1, an air inlet, an air outlet, an inspection port distributed on the tower body 1, a spraying water tank 2 arranged on the outside of the tower body 1, and a multi-stage spraying structure arranged on the inside of the tower body 1. The tower body 1 is divided from bottom to top by a partition frame 3 into an air inlet chamber 4, a pre-filtration chamber 5, a spraying chamber A6, a spraying chamber B7, and an exhaust chamber. The air inlets are located on the air inlet chamber 4 and the air outlet chamber, respectively. The air inlet is connected to the exhaust gas outlet of the thin film casting production line. The multi-stage spray structure can be connected to the output side of the spray water tank 2 through multiple pipelines. The multi-stage spray structure includes spray assembly A and spray assembly B8, wherein spray assembly A and spray assembly B8 are respectively configured in spray chamber A6 and spray chamber B7. Spray assembly B8 is a cross-shaped spray frame, on which multiple nozzles are arranged.

[0021] In this embodiment, the spray assembly A is a multi-angle spray frame. The spray assembly A includes a first motor 9, a bevel gear transmission box 10, a rotating support 11, a rotating frame 12, a second motor 13, a first connecting arm 14, a second connecting arm 15, an electric push rod 16, a base frame 17, a rotating plate 18, and a spray support 19. The shaft end of the first motor 9 is connected to the bevel gear transmission box 10, and the lower side of the bevel gear transmission box 10 is connected to the rotating support 11.

[0022] In this embodiment, a second motor 13 is provided on the outer side of the rotating support 11, and a rotating frame 12 connected to the shaft end of the second motor 13 is provided on the inner side of the rotating support 11. The front end and the rear end of the rotating frame 12 are respectively movably connected to the first connecting arm 14 and the second connecting arm 15.

[0023] In this embodiment, the lower ends of the first connecting arm 14 and the second connecting arm 15 are movably connected to the rear end and the middle of the base frame 17, respectively. An electric push rod 16 is installed on the inner side of the first connecting arm 14 through a pin seat, and the front end of the electric push rod 16 is connected to the rotating plate 18.

[0024] In this embodiment, the rotating plate 18 is rotatably connected to the front end of the base frame 17, and a spray support 19 is installed on the rotating plate 18. The rotating plate 18 can drive the spray support 19 to swing when the second motor 13 and the electric push rod 16 are started.

[0025] The aforementioned multi-stage spray equipment is equipped with spray assembly A and spray assembly B8, which are respectively configured in spray chamber A6 and spray chamber B7. The exhaust gas passes through spray chamber A6 and then exits through spray chamber B7. Spray chamber A6 utilizes a swingable and rotatable spray structure, which has a wider spray range and can adjust its position according to the flow rate of the exhaust gas, ensuring full contact between the exhaust gas and the spray liquid. Spray assembly B8 adopts a cross-shaped direct spray structure, which can quickly flush away harmful substances or impurities in the exhaust gas, improving the quality of exhaust gas treatment.

[0026] It is worth noting that the entire device is controlled by a master control button. Since the device matched with the control button is a common device and belongs to existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage tail gas spraying device for polyimide film production, characterized in that, The system includes a tower body (1), an air inlet, an air outlet, an inspection port distributed on the tower body (1), a spray water tank (2) located on the outside of the tower body (1), and a multi-stage spray structure located on the inside of the tower body (1). The tower body (1) is divided into an air inlet chamber (4), a pre-filtration chamber (5), a spray chamber A (6), a spray chamber B (7), and an air outlet chamber from bottom to top by a partition frame (3). The air inlet and air outlet are located on the air inlet chamber (4) and the air outlet chamber, respectively. The air inlet is connected to the exhaust gas outlet of the thin film casting production line. The multi-stage spray structure can be connected to the output side of the spray water tank (2) through multiple pipelines. The multi-stage spray structure includes... Spray assembly A and spray assembly B (8) are respectively configured in spray chamber A (6) and spray chamber B (7). Spray assembly B (8) is a cross-shaped spray frame with multiple nozzles. Spray assembly A is a multi-angle spray frame. Spray assembly A includes a first motor (9), a bevel gear transmission box (10), a rotating support (11), a rotating frame (12), a second motor (13), a first connecting arm (14), a second connecting arm (15), an electric push rod (16), a base frame (17), a rotating plate (18), and a spray support (19).

2. The multi-stage tail gas spraying device for polyimide film production according to claim 1, characterized in that: The first motor (9) shaft end is connected to the bevel gear transmission box (10), and the lower side of the bevel gear transmission box (10) is connected to the rotating support (11).

3. The multi-stage tail gas spraying device for polyimide film production according to claim 2, characterized in that: The rotating support (11) is provided with a second motor (13) on the outside and a rotating frame (12) connected to the shaft end of the second motor (13) on the inside. The front end and rear end of the rotating frame (12) are respectively movably connected to the first connecting arm (14) and the second connecting arm (15).

4. The multi-stage tail gas spraying device for polyimide film production according to claim 3, characterized in that: The lower ends of the first connecting arm (14) and the second connecting arm (15) are movably connected to the rear end and the middle of the base frame (17), respectively. An electric push rod (16) is installed on the inner side of the first connecting arm (14) through a pin seat. The front end of the electric push rod (16) is connected to the rotating plate (18).

5. The multi-stage tail gas spraying device for polyimide film production according to claim 4, characterized in that: The rotating plate (18) is rotatably connected to the front end of the base frame (17). A spray support (19) is installed on the rotating plate (18). The rotating plate (18) can drive the spray support (19) to swing when the second motor (13) and electric push rod (16) are started.

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