Harmful gas filtering device for plastic production and processing

Abstract

The invention relates to the field of plastic production, in particular to a harmful gas filtering device for plastic production and processing, which comprises a gas input pipeline, a cooling water tank containing cooling liquid and a drying box, one end of the gas input pipeline extends to the cooling liquid in the cooling water tank, and one side of the cooling water tank is communicated with a first pipeline; one end of the first pipeline communicates with one side of the drying box, one side of the outer wall of the drying box communicates with a second pipeline, one end of the second pipeline is provided with a shaking assembly, the bottom end of the shaking assembly is provided with an annular channel, and the outer wall of the annular channel communicates with filtering facilities. Through cooperative use of the shaking assembly, the annular channel and the filtering facility, the filtering device can convey harmful gas to different filtering paths according to the types of the harmful gas, so that damage of the harmful gas to part of the filter element structure is reduced, and normal operation of the filtering device is guaranteed.

Description

TECHNICAL FIELD

[0001] The application relates to the field of plastic production, in particular to a harmful gas filtering device for plastic production and processing. BACKGROUND

[0002] Plastic is an important organic synthetic polymer material and is widely used. At present, the use demand of various industries is also relatively large, which requires a large amount of plastic production and processing work. In the plastic production and processing work process, different types of raw materials and catalysts are usually added, which leads to the generation of some harmful gases in the plastic production and processing work process. Therefore, some waste gas treatment devices need to be used to ensure the safe discharge of waste gas. According to the search, a harmful gas filtering device for plastic production and processing is disclosed in Chinese Patent No. CN2126815U, which comprises a plastic production device, a suction pump and a filter core main body. The upper end of the plastic production device is provided with an air inlet and a suction pump, and the other end of the suction pump is communicated with a gas filtering main body. The outer side of the gas filtering main body is provided with a fixed lock, and the inner side of the fixed lock is connected with an outer connecting edge. The inside of the gas filtering main body is provided with a filter core frame, and the filter core frame is provided with a filter core main body. The both ends of the filter core frame are fixedly provided with an outer connecting edge, and the middle position of the filter core frame is fixedly provided with an inner connecting plate. The inner side of the filter core frame is fixedly provided with a layered plate, and the inner side of the layered plate is fixedly provided with a filter core main body. The harmful gas filtering device for plastic production and processing can not only ensure the normal working state of the filter core frame on the gas filtering main body, but also facilitate the replacement of the filter core main body on the filter core frame, thereby effectively improving the working efficiency of the device.

[0003] At present, different raw materials need to be mixed in plastic production and processing. Due to the difference in material types, the harmful gases discharged will also change. The existing filtering device mainly adopts a composite structure for centralized filtering. However, since there are many harmful gases, some of them will damage some filter cores. For example, the oil mist, viscous substances produced by the volatilization or high-temperature decomposition of plasticizers and lubricants in plastic processing will adhere to the surface of the filter core like "glue", causing the filter material to be blocked. Therefore, in order to ensure the normal work of other filter cores, different harmful gases need to be guided to different filtering facilities according to different harmful gases. SUMMARY

[0004] The application provides a harmful gas filtering device for plastic production and processing.

[0005] The above technical purpose of the application is realized by the following technical scheme:

[0006] The utility model provides a harmful gas filtering device for plastic production and processing, including gas input pipeline, the cooling water tank of containing cooling liquid and drying box, one end of gas input pipeline extends to the cooling liquid in cooling water tank inside, one side of cooling water tank is connected with first pipeline, one end of first pipeline is connected with one side of drying box, its characterized in be: the outer wall one side of drying box is connected with second pipeline, one end of second pipeline is equipped with shaking subassembly, the bottom of shaking subassembly is equipped with annular channel, the outer wall of annular channel is connected with filter facility respectively.

[0007] Through the above technical scheme, by setting the shaking subassembly and the annular channel, a selective gas distribution system is constructed. This enables the device to purposefully guide different types of harmful gases generated during plastic production to the most suitable filter facility, fundamentally avoiding damage to specific filter cartridges by incompatible gases, solving the problem of composite filter cartridges being easily damaged by cross filtering in the background art, thereby significantly prolonging the service life of the filter cartridges, ensuring long-term stable operation of the filtering device, and reducing maintenance costs.

[0008] Optionally, the shaking subassembly includes a vertical pipe, one end of the second pipe is rotatably connected to the vertical pipe, a dial is sleeved on the outer wall of the vertical pipe, a plug shaft is inserted into one side of the dial, and an indicator arrow is connected to the bottom end of one side of the plug shaft.

[0009] Through the above technical scheme, the mechanical linkage structure of the dial and the plug shaft makes the rotation operation intuitive and labor-saving. The indicator arrow provides a clear visual indication of the gas path for the operator, making the operation of switching the filter path simple and accurate, effectively preventing poor filtering effect or equipment damage caused by incorrect path selection, and greatly improving the operation convenience and reliability of the device.

[0010] Optionally, the annular channel includes an outer cylinder and an inner cylinder rotatably connected inside, the bottom end of the vertical pipe penetrates the top center of the outer cylinder and is in communication with the top center of the inner cylinder, three groups of second air holes are formed in the outer wall of the outer cylinder, a first air hole is formed in one side of the inner cylinder and matches one of the second air holes, and the orientation of the first air hole is consistent with the orientation of the indicator arrow.

[0011] Through the above technical scheme, the compact design of the inner cylinder rotating inside the outer cylinder is adopted, and the air path is realized by aligning and misaligning the first air hole and the second air hole. The structure is ingenious and the sealing surface is controllable. At the same time, the orientation of the first air hole is set to be consistent with the orientation of the indicator arrow, establishing a direct correlation between the arrow operation indication and the internal air hole path state, further ensuring the accuracy of path switching, and making the invisible internal structure state clear at a glance through the visible external indication.

[0012] Optionally, a ball bearing is rotatably connected to the bottom surface of the insert shaft, the bottom surface of the ball bearing is in contact with the top surface of the outer cylinder, and a handle is rotatably connected to the top end of the insert shaft.

[0013] By adopting the above technical solution, the ball bearings, positioned between the insert shaft and the top surface of the outer cylinder, transform sliding friction into rolling friction, greatly reducing resistance when rotating the dial. This makes the operation smoother and easier, avoiding operational difficulties or component wear caused by jamming. The grip provides an ergonomically designed force application point, further optimizing the operating experience and improving the ease of use of the device.

[0014] Optionally, the filtration device includes a filter box and an air inlet pipe and an air outlet pipe connected at both ends. One end of the air inlet pipe is connected to one end of the second air hole. An insert plate is inserted inside the filter box, and a filter element is embedded in the outer wall of the insert plate.

[0015] By adopting the above technical solution and using a plug-in design to install the filter elements, filter element replacement and maintenance become extremely convenient. When a filter element needs to be replaced, simply pull out the corresponding plug-in plate; there is no need to disassemble the entire filter box or interrupt the operation of other filter units, achieving modular maintenance. This greatly shortens maintenance time, simplifies the operation process, and effectively improves the efficiency and maintainability of the equipment.

[0016] Optionally, the drying oven includes an outer box, a top cover is snapped onto the top surface of the outer box, and support columns are connected to the four corners of the bottom surface of the top cover. A vent frame is installed at the bottom end of the support column, and the vent frame is slidably connected to the inside of the outer box. The outer walls of the outer box are respectively provided with interfaces for a first pipe and a second pipe that are connected, and the horizontal height of the first pipe interface is less than the horizontal height of the second pipe interface.

[0017] By adopting the above technical solution, a highly efficient drying chamber is formed by setting up a vented frame to hold the desiccant and using a support column to suspend it inside the outer box. By setting the interfaces of the first and second pipes at different heights, the gas is forced to flow from bottom to top in the drying chamber and must pass through the desiccant in the entire vented frame. This prolongs the contact time and contact area between the gas and the desiccant, significantly improving the dehydration and drying effect and providing drier and cleaner gas conditions for subsequent filtration facilities.

[0018] Optionally, a handle is installed on the top surface of the top cover.

[0019] By adopting the above technical solution, an extremely convenient and labor-saving point of leverage is provided for opening and closing the top cover, making the operation of replacing the desiccant in the drying chamber easy and quick.

[0020] Optionally, heat dissipation fins are installed on both sides of the outer wall of the cooling water tank.

[0021] By adopting the above technical solution, the heat exchange area between the water tank and the surrounding air is significantly increased. This can accelerate the dissipation of heat absorbed by the coolant from the high-temperature gas into the air, which helps maintain the low temperature of the coolant. This ensures a continuous and efficient cooling effect on the high-temperature harmful gas and protects the subsequent equipment from high-temperature damage.

[0022] In summary, this application has the following technical effects:

[0023] 1. By setting up gas input pipelines, cooling water tanks and drying chambers, different types of harmful gases generated during plastic production can be purposefully guided to the most suitable filtration facilities. This fundamentally avoids damage to specific filter elements by incompatible gases, solves the problem of composite filter elements easily failing due to cross-filtration mentioned in the background technology, thus significantly extending the service life of filter elements, ensuring the long-term stable operation of the filtration device, and reducing maintenance costs.

[0024] 2. By setting up risers, dials, insert shafts, and indicator arrows, the mechanical linkage structure of the dials and insert shafts makes the rotation operation intuitive and labor-saving. The indicator arrows provide operators with clear visual indication of the gas path, making the operation of switching the filter path simple and accurate. This effectively prevents poor filtration or equipment damage caused by incorrect path selection, greatly improving the ease of operation and reliability of the device.

[0025] 3. By incorporating an outer cylinder, an inner cylinder, a first vent, and a second vent, a compact design is employed. The airflow is controlled by aligning and offsetting the first and second vents, resulting in an ingenious structure and controllable sealing surface. Furthermore, by aligning the orientation of the first vent with that of the indicator arrow, a direct link is established between the arrow's operation indication and the internal vent passage status, further ensuring the accuracy of path switching. This makes the internally invisible structural state readily apparent through externally visible indicators. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a harmful gas filtration device for plastic production and processing according to this application;

[0027] Figure 2 This is a schematic diagram of the drying oven structure of a harmful gas filtration device for plastic production and processing according to this application;

[0028] Figure 3 This is a bottom view of the shaking component of a harmful gas filtration device for plastic production and processing according to this application;

[0029] Figure 4 This is a cross-sectional view of the annular channel structure of a harmful gas filtration device for plastic production and processing according to this application;

[0030] Figure 5 This is a schematic diagram of a filtration facility for a harmful gas filtration device used in plastic production and processing, as described in this application.

[0031] Explanation of reference numerals in the attached diagram: 1. Gas input pipe; 2. Cooling water tank; 3. Drying oven; 31. Outer casing; 32. Top cover; 33. Support column; 34. Ventilation frame; 35. Handle; 4. Shaking assembly; 41. Riser; 42. Dial; 43. Insert shaft; 44. Indicating arrow; 45. Ball bearing; 46. Grip; 5. Annular channel; 51. Outer cylinder; 52. Inner cylinder; 53. First vent; 54. Second vent; 6. Filtration system; 61. Filter box; 62. Inlet pipe; 63. Outlet pipe; 64. Insert plate; 65. Filter element; 7. First pipe; 8. Second pipe; 9. Heat dissipation fins. Detailed Implementation

[0032] The present application will be further described in detail below with reference to the accompanying drawings.

[0033] Example 1

[0034] This application discloses a harmful gas filtration device for plastic production and processing, referring to... Figure 1 The filtration device includes a gas input pipe 1, a cooling water tank 2 containing coolant, and a drying chamber 3. One end of the gas input pipe 1 extends into the coolant inside the cooling water tank 2. The gas input pipe 1 can directly transport harmful gases generated during plastic production to the cooling water tank 2. The coolant in the cooling water tank 2 can quickly reduce the temperature of the high-temperature harmful gases, preventing high-temperature damage to subsequent filtration components. A first pipe 7 is connected to one side of the cooling water tank 2. One end of the first pipe 7 is connected to one side of the drying chamber 3. The cooled gas enters the drying chamber 3 through the first pipe 7 to further remove moisture and prevent humid gas from affecting the filtration effect of the filtration facility 6. A second pipe 8 is connected to one side of the outer wall of the drying chamber 3. A shaking component 4 is provided at one end of the second pipe 8. An annular channel 5 is provided at the bottom of the shaking component 4. The outer wall of the annular channel 5 is connected to the filtration facility 6. The dried gas enters the shaking component 4 through the second pipe 8. According to the type of harmful gas generated by the current raw materials, the shaking component 4 is adjusted to change the passage of the annular channel 5, thereby distributing it to the required filtration facility 6 until it receives the corresponding filtration treatment and is discharged.

[0035] Reference Figure 3The rocking assembly 4 includes a riser 41, one end of the second pipe 8 is rotatably connected to the riser 41, a dial 42 is fitted on the outer wall of the riser 41, a shaft 43 is inserted and connected to one side of the dial 42, and an indicator arrow 44 is connected to the bottom end of the shaft 43. The riser 41 provides a flow channel for gas and is rotatably connected to the second pipe 8, and can rotate synchronously with the dial 42; the shaft 43 on one side of the dial provides an installation base for the indicator arrow 44. The indicator arrow 44 can intuitively display the current gas flow direction of the filter facility 6, making it convenient for operators to confirm the filtration path and avoid misoperation.

[0036] Reference Figure 4 The annular channel 5 includes an outer cylinder 51 and an inner cylinder 52 rotatably connected inside. The bottom end of the riser 41 passes through the center of the top surface of the outer cylinder 51 and is connected to the center of the top surface of the inner cylinder 52. The outer wall of the outer cylinder 51 is provided with three sets of second air holes 54. The inner cylinder 52 is provided with a first air hole 53 on one side that matches one of the second air holes 54. The orientation of the first air hole 53 is consistent with the orientation of the indicator arrow 44. The outer cylinder 51 provides installation and protection space for the inner cylinder 52. The inner cylinder 52 is connected to the riser 41 and can rotate synchronously with the riser 41. The first air hole 53 on one side of the inner cylinder 52 cooperates with the second air hole 54 of the outer cylinder 51. By rotating the inner cylinder 52, the alignment of the first air hole 53 with different second air holes 54 can be adjusted, thereby switching the gas to enter the filter facility 6 in different directions. The first air hole 53 is aligned with the orientation of the indicator arrow 44. The position of the air hole in the inner cylinder 52 can be quickly determined by the arrow to ensure accurate switching.

[0037] A ball bearing 45 is rotatably connected to the bottom surface of the insert shaft 43. The bottom surface of the ball bearing 45 contacts the top surface of the outer cylinder 51. A handle 46 is rotatably connected to the top of the insert shaft 43. By rotating the ball bearing 45, the sliding friction between the insert shaft 43 and the top surface of the outer cylinder 51 is converted into rolling friction, reducing the resistance when the dial 42 rotates, making the switching operation of the rocking component 4 smoother. The handle 46 at the top of the insert shaft 43 provides a convenient point of force for rotating the dial 42, improving the flexibility of operation.

[0038] Reference Figure 5 The filtration facility 6 includes a filter box 61 and an inlet pipe 62 and an outlet pipe 63 connected at both ends. One end of the inlet pipe 62 is connected to one end of the second air hole 54. An insert plate 64 is inserted inside the filter box 61, and a filter element 65 is embedded in the outer wall of the insert plate 64. The filter box 61 provides a sealed filtration space for the filter element 65. The inlet pipe 62 is connected to the second air hole 54 of the annular channel 5 and can receive dry gas from the annular channel 5. The outlet pipe 63 is used to discharge the filtered clean gas. The insert plate 64 inside the filter box 61 can fix the position of the filter element 65. At the same time, the insert plate 64 is inserted and connected to the filter box 61, and the insert plate 64 can be directly pulled out to replace the filter element 65 without disassembling the filter box 61. The maintenance is convenient and does not affect the operation of other filtration facilities.

[0039] Reference Figure 2 The drying chamber 3 includes an outer box 31, with a top cover 32 snapped onto the top surface of the outer box 31. Support columns 33 are connected to the four corners of the bottom surface of the top cover 32, and a vent frame 34 is installed at the bottom of each support column 33. The vent frame 34 is slidably connected to the inside of the outer box 31. The outer walls of the outer box 31 have interfaces on both sides that connect to a first pipe 7 and a second pipe 8, with the horizontal height of the first pipe 7 interface being lower than that of the second pipe 8 interface. The outer box 31 provides installation space for the vent frame 34. A desiccant can be placed inside the vent frame 34. After gas enters through the first pipe 7 interface, it must pass through the desiccant inside the vent frame 34 before exiting through the second pipe 8 interface. The lower horizontal height of the first pipe 7 interface compared to the second pipe 8 interface extends the gas flow path within the drying chamber 3, ensuring sufficient adsorption of moisture and improving the drying effect. Furthermore, the snap-fit ​​connection between the top cover 32 and the outer box 31 facilitates opening and replacement of the desiccant inside the vent frame 34.

[0040] A handle 35 is installed on the top surface of the top cover 32. The handle 35 provides a convenient point of force for opening the top cover. Operators can easily remove the top cover 32 through the handle and quickly replace the desiccant in the vent frame 34.

[0041] Cooling fins 9 are installed on both sides of the outer wall of the cooling water tank 2. The cooling fins 9 increase the contact area between the water tank and the air, which can quickly dissipate the heat absorbed by the coolant into the air, maintain the low temperature of the coolant, and ensure that the cooling water tank 2 has a stable cooling effect on harmful gases.

[0042] Example 2

[0043] This invention provides a method for using a harmful gas filtration device for plastic production and processing, comprising the following steps:

[0044] Step 1: Before use, check the status of each component: Confirm that the coolant level in the cooling water tank 2 is sufficient and that the heat dissipation fins 9 on the outer wall are free of dust to ensure heat dissipation effect; Open the top cover 32 of the drying box 3 through the handle 35, check whether the desiccant in the vent frame 34 is ineffective, if ineffective, replace it with a new desiccant and close the top cover, ensuring that the outer box 31 and the top cover are tightly locked; Check whether the insert plate 64 of the filter device 6 is inserted in place, and whether the filter element 65 is undamaged or blocked. At the same time, confirm that there are no leaks at the interfaces of the gas input pipe 1, the first pipe 7, and the second pipe 8. This completes the equipment inspection and preparation for the pretreatment stage, laying the foundation for the filtration of harmful gases.

[0045] Step 2: Based on the types of harmful gases generated during plastic production, determine the appropriate filter facility 6: The operator holds the handle 46 at the top of the shaft 43 of the shaking component 4 and manually rotates the dial 42. The dial drives the riser 41 to rotate synchronously, and the inner cylinder 52 of the annular channel 5 connected to the bottom of the riser rotates accordingly. Observe the indicator arrow 44 at the bottom of the shaft. When the arrow points to the second air hole 54 of the outer cylinder 51 corresponding to the target filter facility, stop rotating. At this time, the first air hole 53 of the inner cylinder 52 is precisely aligned with the second air hole, and the gas flow path switching is completed. During the process, the ball bearings 45 on the bottom surface of the shaft reduce the rotation resistance, ensure smooth adjustment, and avoid poor filtration effect due to path mismatch.

[0046] Step 3: Start the device. The harmful gases generated during plastic production enter the cooling water tank 2 through the gas input pipe 1. They are fully cooled in the coolant, and the high-temperature gas temperature decreases and some liquid impurities condense. The cooled gas enters the drying chamber 3 through the first pipe 7. It flows in from the low-level interface of the first pipe 7 in the outer chamber 31, passes through the desiccant in the vent frame 34 to remove moisture, and then enters the riser 41 of the shaking assembly 4 through the high-level interface of the second pipe 8. The gas enters the target filtration facility 6 through the aligned first air hole 53 of the inner cylinder and the second air hole 54 of the outer cylinder. It enters the filter box 61 through the air inlet pipe 62, passes through the filter element 65 to complete the filtration of harmful components, and finally is discharged from the outlet pipe 63 in compliance with standards.

[0047] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A harmful gas filtration device for plastic production and processing, comprising a gas input pipe (1), a cooling water tank (2) containing coolant, and a drying chamber (3), wherein one end of the gas input pipe (1) extends into the coolant inside the cooling water tank (2), and a first pipe (7) is connected to one side of the cooling water tank (2), and one end of the first pipe (7) is connected to one side of the drying chamber (3), characterized in that: One side of the outer wall of the drying box (3) is communicated with a second pipeline (8), one end of the second pipeline (8) is provided with a shaking assembly (4), the bottom end of the shaking assembly (4) is provided with an annular channel (5), and the outer wall of the annular channel (5) is respectively communicated with a filtering device (6).

2. A harmful gas filtering device for plastic production and processing according to claim 1, characterized in that: The shaking assembly (4) comprises a vertical pipe (41), one end of the second pipeline (8) is rotationally communicated with the vertical pipe (41), the outer wall of the vertical pipe (41) is sleeved with a dial plate (42), one side of the dial plate (42) is inserted with a plug shaft (43), and the bottom end of the plug shaft (43) is connected with an indicating arrow (44) on one side.

3. A harmful gas filtering device for plastic production and processing according to claim 2, characterized in that: The annular channel (5) comprises an outer cylinder (51) and an inner cylinder (52) rotationally connected inside, the bottom end of the vertical pipe (41) penetrates the top center of the outer cylinder (51) and is communicated with the top center of the inner cylinder (52), three groups of second air holes (54) are formed in the outer wall of the outer cylinder (51), one side of the inner cylinder (52) is provided with a first air hole (53) matched with one of the second air holes (54), and the direction of the first air hole (53) is consistent with the direction of the indicating arrow (44).

4. The harmful gas filtering device for plastic production and processing according to claim 3, characterized in that: The bottom surface of the plug shaft (43) is rotationally connected with a ball (45), the bottom surface of the ball (45) is in contact with the top surface of the outer cylinder (51), and the top end of the plug shaft (43) is rotationally connected with a handle (46).

5. A harmful gas filtering device for plastic production and processing according to claim 4, characterized in that: The filtering device (6) comprises a filtering box (61), an air inlet pipe (62) and an air outlet pipe (63) communicated at two ends, one end of the air inlet pipe (62) is communicated with one end of the second air hole (54), the inside of the filtering box (61) is inserted with a plug plate (64), and the outer wall of the plug plate (64) is embedded with a filter element (65).

6. The harmful gas filtering device for plastic production and processing according to claim 1, characterized in that: The drying box (3) comprises an outer box (31), the top surface of the outer box (31) is clamped with a top cover (32), the bottom surface of the top cover (32) is respectively connected with a support column (33) at four corners, the bottom end of the support column (33) is provided with a breathable frame (34), the breathable frame (34) is slidingly connected inside the outer box (31), the outer wall of the outer box (31) is respectively provided with an interface for connecting the first pipeline (7) and the second pipeline (8) on both sides, and the horizontal height of the first pipeline (7) interface is less than that of the second pipeline (8) interface.

7. A harmful gas filtering device for plastic production and processing according to claim 6, characterized in that: The top surface of the top cover (32) is provided with a handle (35).

8. The harmful gas filtering device for plastic production and processing according to claim 1, characterized in that: The outer wall of the cooling water tank (2) is respectively provided with a heat dissipation fin (9) on both sides.

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