A waste gas treatment device for PCB photosensitive dry film production

Abstract

This disclosure provides a waste gas treatment device for PCB photosensitive dry film production, belonging to the technical field of waste gas treatment devices. It includes: an inner cylinder with an outer cylinder rotatably fitted around its outer periphery; a plurality of sieve holes are evenly spaced on the outer peripheral wall of the inner cylinder; two sealing rings are slidably fitted onto the outer peripheral wall via an annular groove, symmetrically positioned at both ends of the sieve holes; and the outer peripheral wall of the sealing rings contacts the inner wall of the outer cylinder. An air inlet mechanism is located at one end of the outer cylinder and is used to introduce waste gas into the inner cylinder. During the adsorption of organic waste gas by activated carbon, the inner cylinder rotates within the outer cylinder, continuously agitating the activated carbon particles within it. This prevents some activated carbon from constantly contacting a high concentration of organic waste gas, thus avoiding rapid saturation of some activated carbon, reducing the desorption frequency of the activated carbon, and improving the waste gas treatment efficiency of the device.

Description

Technical Field

[0001] This utility model relates to the technical field of waste gas treatment devices, specifically to a waste gas treatment device for PCB photosensitive dry film production. Background Technology

[0002] PCB photosensitive dry film is a key material used to manufacture precision circuit patterns and is widely used in the PCB pattern transfer process. During the production of PCB photosensitive dry film, a certain amount of volatile organic waste gas is often emitted. At this time, waste gas treatment devices are often used to treat the volatile organic waste gas in a harmless manner. In the process of waste gas treatment in PCB photosensitive dry film production, zeolite rotor adsorption concentration or activated carbon adsorption is generally required.

[0003] When using activated carbon to adsorb organic waste gas from exhaust gases, the gas typically flows from the beginning of the activated carbon into the gaps between the activated carbon particles and then exits from the end. This means that the activated carbon at the beginning is always in contact with a high concentration of organic waste gas, causing it to reach saturation first and become unable to continue adsorbing the organic waste gas. As a result, due to the overall deterioration of the device's performance, it is often necessary to perform overall activated carbon desorption treatment, which increases the desorption frequency of the activated carbon and reduces the waste gas treatment efficiency of the device. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to provide a waste gas treatment device for PCB photosensitive dry film production. During the process of activated carbon adsorbing organic waste gas in the waste gas, the inner cylinder rotates inside the outer cylinder, continuously turning the activated carbon particles in the inner cylinder. This avoids some activated carbon from being in constant contact with high concentrations of organic waste gas, thus preventing some activated carbon from quickly reaching saturation, reducing the desorption frequency of activated carbon, and improving the waste gas treatment efficiency of the device.

[0005] To solve the above problems, this utility model provides a waste gas treatment device for PCB photosensitive dry film production, including: an inner cylinder, an outer cylinder rotatably sleeved on its outer periphery, a plurality of sieve holes equally spaced on its outer periphery wall, and two sealing rings slidably sleeved on its outer periphery wall through an annular groove, with the two sealing rings symmetrically arranged at both ends of the plurality of sieve holes, and the outer periphery wall of the sealing rings contacting the inner wall of the outer cylinder. An air intake mechanism, located at one end of the outer cylinder, is used to guide exhaust gas into the inner cylinder; A rectangular hole is formed on the bottom side of the outer cylinder. A flow guiding mechanism is provided on the bottom side of the rectangular hole to discharge the gas inside. Two rotating shafts are symmetrically mounted inside the rectangular hole. A soft sleeve is fixedly sleeved on the outer periphery of the rotating shaft, and the outer wall of the soft sleeve is in contact with the inner wall of the rectangular hole, the outer periphery of the inner cylinder, and the outer periphery of the sealing ring. The material replacement mechanism, located below the air inlet mechanism, is used to replace the activated carbon inside the inner cylinder.

[0006] Preferably, a driver is fixedly installed on the side wall of the other end of the outer cylinder, and the driving end of the driver is inserted into the outer cylinder and fixedly connected to the inner cylinder.

[0007] Preferably, a number of levers are fixedly installed in a circumferential array on the inner wall of the inner cylinder, and each lever is located between two corresponding sieve holes.

[0008] Preferably, the air intake mechanism includes a duct, which is laterally disposed at the axial position of the inner cylinder, and one end of the duct is rotatably connected to the inner cylinder, the other end of the duct extends to the outside of the outer cylinder and is fixedly connected to the outer cylinder, the other end of the duct is rotatably connected to the inner cylinder through a bearing and a sealing ring, and a plurality of exhaust holes are equally spaced on the bottom side of the duct.

[0009] Preferably, the flow guiding mechanism includes a housing located on the bottom side of the outer cylinder, with its top opening fitted around the outer periphery of the rectangular hole and fixedly connected to the outer wall of the outer cylinder. An exhaust pipe is connected to the bottom side of the housing.

[0010] Preferably, the material changing mechanism includes a threaded hole, which is opened on the side wall of one end of the outer cylinder and communicates with the interior of the inner cylinder. The threaded hole is located below the guide tube. The internal thread of the threaded hole is fitted with a cap, and the cap is located inside the cylinder wall of the inner cylinder. The cap has a hexagonal groove.

[0011] This utility model has at least the following beneficial effects: 1. During the adsorption of organic waste gas in the waste gas by activated carbon, the inner cylinder rotates inside the outer cylinder, continuously agitating the activated carbon particles in the inner cylinder. This prevents some activated carbon from being in constant contact with a high concentration of organic waste gas, thus preventing some activated carbon from quickly reaching saturation, reducing the desorption frequency of activated carbon, and improving the waste gas treatment efficiency of the device. 2. When the activated carbon in the inner cylinder needs to be desorbed, hot air or nitrogen is injected into the cylinder by the air inlet mechanism, and the activated carbon is turned over at the same time. This allows the hot air or nitrogen to come into full contact with the activated carbon and avoids continuous blockage between the activated carbon particles, thereby improving the desorption effect of the activated carbon. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1This is a perspective view of the overall structure of this utility model; Figure 2 This is a front view of the internal structure of the inner and outer cylinders of this utility model; Figure 3 This utility model Figure 2 Enlarged view of the structure at point A in the middle; Figure 4 This is a right view of the internal structure of the inner and outer cylinders of this utility model; Figure 5 This is a perspective view of the outer cylinder of this utility model after it has been inverted.

[0014] The reference numerals in the attached figures are as follows: 1. Inner cylinder; 2. Outer cylinder; 3. Air inlet mechanism; 31. Guide tube; 32. Exhaust port; 4. Flow guiding mechanism; 41. Box body; 42. Exhaust pipe; 5. Material changing mechanism; 51. Threaded hole; 52. Cover; 53. Hexagonal groove; 6. Screen hole; 7. Sealing ring; 8. Rectangular hole; 9. Rotating shaft; 10. Soft sleeve; 11. Driver; 12. Paddle plate. Detailed Implementation

[0015] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0016] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0017] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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.

[0018] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0019] See also Figure 1 , Figure 2 and Figure 3 As shown, according to an embodiment of the present invention, a waste gas treatment device for PCB photosensitive dry film production is provided, comprising: an inner cylinder 1, an outer cylinder 2 rotatably sleeved on its outer periphery, a plurality of sieve holes 6 evenly spaced on its outer periphery wall, and two sealing rings 7 slidably sleeved on its outer periphery wall through an annular groove, the two sealing rings 7 being symmetrically arranged at both ends of the plurality of sieve holes 6, the outer periphery wall of the sealing rings 7 being in contact with the inner wall of the outer cylinder 2; The air intake mechanism 3 is located at one end of the outer cylinder 2 and is used to introduce exhaust gas into the inner cylinder 1; A rectangular hole 8 is opened on the bottom side of the outer cylinder 2. A flow guiding mechanism 4 is provided on the bottom side of the rectangular hole 8 to discharge the gas inside the rectangular hole 8. Two rotating shafts 9 are symmetrically rotated inside the rectangular hole 8. A soft sleeve 10 is fixedly sleeved on the outer periphery of the rotating shaft 9, and the outer wall of the soft sleeve 10 is in contact with the inner wall of the rectangular hole 8, the outer periphery of the inner cylinder 1, and the outer periphery of the sealing ring 7. The material replacement mechanism 5 is located below the air inlet mechanism 3 and is used to replace the activated carbon in the inner cylinder 1.

[0020] In this embodiment, when the improved waste gas treatment device is used, the waste gas generated during the production of PCB photosensitive dry film is collected by the existing gas collection device, and the waste gas is injected into the inner cylinder 1 through the air inlet mechanism 3. Then the waste gas passes through the gaps between the activated carbon particles and the inflow rectangular hole 8 at the bottom. At the same time, the activated carbon removes the organic waste gas in the waste gas. Finally, the gas is discharged out of the outer cylinder 2 through the flow guide mechanism 4, and the flow guide mechanism 4 guides the filtered waste gas to the corresponding position for discharge or to the existing subsequent waste gas treatment equipment for further harmless treatment. During the adsorption of organic waste gas in the waste gas by activated carbon, the activated carbon particles in the inner cylinder 1 are continuously turned over by the rotation of the inner cylinder 1 inside the outer cylinder 2. This avoids some activated carbon from being in constant contact with high concentrations of organic waste gas, thus preventing some activated carbon from reaching saturation quickly, reducing the desorption frequency of activated carbon, and improving the waste gas treatment efficiency of the device. It should be noted that when the activated carbon in the inner cylinder 1 needs to be desorbed, hot air or nitrogen is injected into the inner cylinder by the air inlet mechanism 3, and the activated carbon is turned over at the same time, so that the hot air or nitrogen can fully contact the activated carbon and avoid continuous blocking between the activated carbon, thereby improving the desorption effect of the activated carbon.

[0021] In a further preferred embodiment of this utility model, such as Figure 1 and Figure 2 As shown, a driver 11 is fixedly installed on the side wall of the other end of the outer cylinder 2, and the driving end of the driver 11 is inserted into the outer cylinder 2 and fixedly connected to the inner cylinder 1. In this embodiment, please refer to Figure 1 and Figure 2 As shown, when the organic waste gas in the waste gas is adsorbed by activated carbon, the inner cylinder 1 is driven by the driver 11 to rotate at a constant speed inside the outer cylinder 2. (The inner cylinder 1 and the outer cylinder 2 are connected by a bearing, and the driver 11 is mainly composed of a shell, a servo motor, and a gear transmission structure.) The device has a high degree of automation.

[0022] In a further preferred embodiment of this utility model, such as Figure 1 , Figure 2 and Figure 4 As shown, a number of levers 12 are fixedly installed in a circular array on the inner wall of the inner cylinder 1, and each lever 12 is located between two corresponding sieve holes 6. In this embodiment, please refer to Figure 2 and Figure 4 As the inner cylinder 1 rotates within the outer cylinder 2, the activated carbon particles located at the bottom can be directly pushed out of the bottom activated carbon particle pile in the inner cylinder 1 due to the mutual contact between the deflector 12 and the bottom activated carbon particles, thereby enhancing the turning effect of the activated carbon particles.

[0023] In a further preferred embodiment of this utility model, such as Figure 2 and Figure 4 As shown, the air intake mechanism 3 includes a duct 31, which is laterally located at the axial position of the inner cylinder 1. One end of the duct 31 is rotatably connected to the inner cylinder 1, and the other end of the duct 31 extends to the outside of the outer cylinder 2 and is fixedly connected to the outer cylinder 2. The other end of the duct 31 is rotatably connected to the inner cylinder 1 through a bearing and a sealing ring. Several exhaust holes 32 are equally spaced on the bottom side of the duct 31. In this embodiment, (the other end of the conduit 31 is connected to an existing gas collection device and a gas injection device via an electrically controlled three-way valve and a pipeline, respectively. Both devices inject waste gas, hot air, or nitrogen generated during the PCB photosensitive dry film production process into the conduit 31 via pipelines and the electrically controlled three-way valve). Please refer to... Figure 2 and Figure 4 As shown, after the gas (waste gas, hot air or nitrogen generated during the production of PCB photosensitive dry film) is injected into the conduit 31, it is discharged downward through the exhaust port 32. Since the gas passage volume at the exhaust port 32 is limited, the gas in the injection conduit 31 will be diverted into multiple streams and discharged from different positions in the inner cylinder 1 to accelerate the mixing of the gas in the inner cylinder 1 with the injected gas.

[0024] In a further preferred embodiment of this utility model, such as Figure 2 , Figure 4 and Figure 5 As shown, the flow guiding mechanism 4 includes a box 41, which is located on the bottom side of the outer cylinder 2, and its top opening is fitted onto the outer periphery of the rectangular hole 8 and fixedly connected to the outer wall of the outer cylinder 2. An exhaust pipe 42 is installed on the bottom side of the box 41. In this embodiment, (please refer to...) Figure 4 As shown, the portion of the soft sleeve 10 near the inner cylinder 1 abuts against the outer peripheral wall of the inner cylinder 1, causing the soft sleeve 10 to deform and block the corresponding sieve holes 6 on the inner cylinder 1. Please refer to... Figure 4 and Figure 5 As shown, during the rotation of the inner cylinder 1 inside the outer cylinder 2, due to the friction between the inner cylinder 1 and the soft sleeve 10, the rotating inner cylinder 1 drives the rotating shaft 9 to rotate together inside the rectangular hole 8 through the soft sleeve 10. At this time, the rotating soft sleeve 10, together with two sealing rings 7, seals the gap between the inner cylinder 1 and the inner wall of the outer cylinder 2 at the position of the rectangular hole 8, so that the exhaust gas in the inner cylinder 1 always flows downward through the gap of the activated carbon particles and the sieve hole 6 located on the top side of the rectangular hole 8 into the rectangular hole 8, preventing the exhaust gas from flowing directly into the rectangular hole 8 through the gap between the inner cylinder 1 and the inner wall of the outer cylinder 2 without passing through the gap between the activated carbon particles. The filtered exhaust gas flows directly into the housing 41 through the rectangular hole 8, and then the exhaust pipe 42 guides the filtered exhaust gas to the corresponding location for discharge or to the existing subsequent exhaust gas treatment equipment for further harmless treatment.

[0025] In a further preferred embodiment of this utility model, such as Figure 2 , Figure 3 and Figure 4 As shown, the material changing mechanism 5 includes a threaded hole 51, which is opened on the side wall of one end of the outer cylinder 2 and communicates with the interior of the inner cylinder 1. The threaded hole 51 is located below the guide tube 31. The internal thread of the threaded hole 51 is fitted with a cover 52, and the cover 52 is located inside the cylinder wall of the inner cylinder 1. The cover 52 is provided with a hexagonal groove 53. In this embodiment, please refer to Figure 2 , Figure 3 and Figure 4 As shown, when replacing the activated carbon granules in the inner cylinder 1, the angle of the inner cylinder 1 is adjusted by the driver 11 until the cap 52 is aligned with the threaded hole 51 on the outer cylinder 2. Then, the user inserts a hex wrench into the hexagonal groove 53 and twists the cap 52 in the opposite direction to unscrew it from the threaded hole 51. At this time, an existing scraper or shovel can be used to remove the activated carbon granules from the inner cylinder 1 through the threaded hole 51. Then, new activated carbon granules are inserted into the inner cylinder 1 through the threaded hole 51, and the cap 52 is screwed back into the threaded hole 51 in the inner cylinder 1. The replacement of the activated carbon granules in the inner cylinder 1 is thus completed. The operation of replacing activated carbon is simple.

[0026] Working principle: When this improved waste gas treatment device is in use, the waste gas generated during the production of PCB photosensitive dry film is collected by the existing gas collection device, and the waste gas is injected into the inner cylinder 1 through the air inlet mechanism 3. Then the waste gas passes through the gaps between the activated carbon particles and the inflow rectangular hole 8 at the bottom. At the same time, the organic waste gas in the waste gas is removed by the adsorption of the activated carbon particles. Finally, the filtered waste gas is guided to the corresponding position for discharge through the exhaust pipe 42 or guided to the existing subsequent waste gas treatment equipment for further harmless treatment. During the process of activated carbon adsorbing organic waste gas in the exhaust gas, the driver 11 drives the inner cylinder 1 to rotate at a constant speed, continuously turning the activated carbon particles in the inner cylinder 1 so that the activated carbon particles can fully contact the exhaust gas.

[0027] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0028] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A waste gas treatment device for PCB photosensitive dry film production, characterized by, include: The inner cylinder (1) has an outer cylinder (2) rotatably sleeved on its outer periphery. Several sieve holes (6) are equally spaced on its outer periphery wall. Two sealing rings (7) are slidably sleeved on its outer periphery wall through an annular groove. The two sealing rings (7) are symmetrically arranged at both ends of several sieve holes (6). The outer periphery wall of the sealing ring (7) is in contact with the inner wall of the outer cylinder (2). An air intake mechanism (3) is located at one end of the outer cylinder (2) and is used to introduce exhaust gas into the inner cylinder (1); A rectangular hole (8) is opened on the bottom side of the outer cylinder (2). A flow guiding mechanism (4) is provided on the bottom side of the hole to discharge the gas inside the rectangular hole (8). Two rotating shafts (9) are symmetrically rotated inside the hole. A soft sleeve (10) is fixedly sleeved on the outer periphery of the rotating shaft (9). The outer wall of the soft sleeve (10) is in contact with the inner wall of the rectangular hole (8), the outer periphery of the inner cylinder (1), and the outer periphery of the sealing ring (7). The material replacement mechanism (5) is located below the air intake mechanism (3) and is used to replace the activated carbon in the inner cylinder (1).

2. The waste gas treatment device for PCB photosensitive dry film production according to claim 1, characterized in that: A driver (11) is fixedly installed on the side wall of the other end of the outer cylinder (2), and the driving end of the driver (11) is inserted into the outer cylinder (2) and fixedly connected to the inner cylinder (1).

3. The waste gas treatment device for PCB photosensitive dry film production according to claim 2, characterized in that: The inner wall of the inner cylinder (1) is fixedly equipped with several levers (12) in a circumferential array, and each lever (12) is located between two corresponding sieve holes (6).

4. The waste gas treatment device for PCB photosensitive dry film production according to claim 3, characterized in that: The air intake mechanism (3) includes a conduit (31), which is horizontally positioned at the axial center of the inner cylinder (1). One end of the conduit (31) is rotatably connected to the inner cylinder (1), and the other end of the conduit (31) extends to the outside of the outer cylinder (2) and is fixedly connected to the outer cylinder (2). The other end of the conduit (31) is rotatably connected to the inner cylinder (1) through a bearing and a sealing ring. Several exhaust holes (32) are evenly spaced on the bottom side of the conduit (31).

5. The waste gas treatment device for PCB photosensitive dry film production according to claim 4, characterized in that: The flow guiding mechanism (4) includes a box (41) located on the bottom side of the outer cylinder (2), and its top opening is fitted onto the outer periphery of the rectangular hole (8) and fixedly connected to the outer wall of the outer cylinder (2). The bottom side of the box (41) is connected to an exhaust pipe (42).

6. The waste gas treatment device for PCB photosensitive dry film production according to claim 5, characterized in that: The material changing mechanism (5) includes a threaded hole (51), which is opened on the side wall of one end of the outer cylinder (2) and communicates with the interior of the inner cylinder (1). The threaded hole (51) is located below the guide tube (31). The internal thread of the threaded hole (51) is fitted with a cap (52), and the cap (52) is located inside the cylinder wall of the inner cylinder (1). The cap (52) is provided with a hexagonal groove (53).

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