Laboratory waste gas purification device with multi-stage treatment structure

Abstract

The invention discloses a laboratory waste gas purification device with a multi-stage treatment structure, and particularly relates to the field of waste gas purification treatment.The laboratory waste gas purification device comprises a filter box, the bottom of one side of the filter box is communicated with a gas inlet groove, the bottom of the other side of the filter box is communicated with an exhaust port, and a cover ventilation mechanism and a ventilation filter mechanism are arranged in the filter box; according to the invention, entering waste gas is covered by the cover cylinder box, and at the moment, the waste gas within a certain range is independently separated and is collected and filtered by the gas pressing plate, namely, a certain amount of waste gas is independently conveyed to a filtering position and then is slowly and effectively treated; meanwhile, the passing and persistent waste gas is heated through the reciprocating electric heating plate, namely microorganisms such as germs possibly contained in the waste gas are killed through high temperature, so that the microorganisms such as the germs in the waste gas are purified, and the purification effect on the waste gas is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas purification and treatment, and more specifically, to a laboratory waste gas purification device with a multi-stage treatment structure. Background Art

[0002] Waste gas refers to toxic and harmful gases discharged by humans in the process of production and life, especially from chemical plants, steel mills, pharmaceutical plants, coking plants and refineries. The waste gas emitted has a strong odor, seriously polluting the environment and affecting human health.

[0003] Chinese invention patent CN114042361A discloses a laboratory internal waste gas tower multi-stage adsorption treatment device, which is to suck the polluted gas inside the laboratory from the primary filter suction net under the negative pressure in the upper circular air chamber, and then be discharged from the primary filter net into the deep filter enclosure box after being filtered by the primary filter material, and then be filtered by the intermediate filter material, and then be continuously sucked by the turbine fan at the top of the liquid and gas main tower, and then pass through the tower inlet air hole and the deep filter net into the liquid and gas main tower, and then be adsorbed and purified by the sprayed atomized elution liquid and the exchange filler to form trace polluted gas, and then pass through the exchange net into the static exhaust box for high-efficiency filter membrane adsorption treatment, and the turbine fan on the air box upper cover of the static exhaust box drives the clean gas after multi-stage adsorption, and is sucked up from the bottom of the clean gas net and discharged to all directions along the gap between the upper cover brackets;

[0004] However, although the above-mentioned patent document has the function of purifying exhaust gas, it only drives the exhaust gas through the filtering area continuously and quickly through the negative pressure airflow. Since the prior art lacks a structure for filtering the airflow in batches, the exhaust gas passes through the purification area too fast, resulting in a low purification effect. At the same time, the exhaust gas is simply physically filtered, and the pathogens and other microorganisms that may be contained in the exhaust gas generated in the laboratory cannot be effectively purified, resulting in the presence of pathogens and other microorganisms in the final discharged gas, that is, the exhaust gas purification is not comprehensive and effective.

[0005] In view of the above technical defects, a solution is now provided. Summary of the invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a laboratory waste gas purification device with a multi-stage treatment structure, which covers the incoming waste gas through a cover box. At this time, the waste gas within a certain range is separated separately and collected and filtered through a pressure plate, so that the treatment of the waste gas is intermittent and quantitative and the flow rate can be controlled, that is, a certain amount of waste gas is separately transported to the filtering position and then slowly and effectively treated; at the same time, the passing and temporarily retained waste gas is heated by a reciprocating electric heating plate, that is, microorganisms such as pathogens that may be contained in the waste gas are killed by high temperature, so that the microorganisms such as pathogens in the waste gas are purified, and the purification effect of the waste gas is improved to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a laboratory waste gas purification device with a multi-stage treatment structure, comprising a filter box, one side of the filter box is connected to an air inlet groove at the bottom, the other side of the filter box is connected to an exhaust port at the bottom, and a cover ventilation mechanism and a ventilation filter mechanism are arranged inside the filter box;

[0008] The cover ventilation mechanism includes a motor fixedly mounted on the top inner wall, a reciprocating threaded rotating rod is provided at the bottom of the motor, the reciprocating threaded rotating rod is rotatably mounted on the inner wall of the filter box, the reciprocating threaded rotating rod is arranged in a vertical state, the outer wall of the reciprocating threaded rotating rod is threadedly connected with an air pressure plate, the air pressure plate is arranged in a horizontal state, a rubber ring is fixedly mounted on the outer wall of the air pressure plate, the rubber ring is arranged in a horizontal state, a plurality of top supporting columns are fixedly mounted on the top of the air pressure plate, and the plurality of top supporting columns are arranged in a vertical state.

[0009] In a preferred embodiment, the outer wall of the rubber ring is provided with a cover box, and the cover box is slidably installed on the inner wall of the filter box. The outer wall of the cover box and the inner wall of the filter box are in contact with each other, and the inner wall of the cover box and the outer wall of the rubber ring are in contact with each other. A rubber gasket is fixedly installed on the bottom outer wall of the cover box.

[0010] In a preferred embodiment, a partition is provided on one side of the cover barrel box, and the partition is fixedly mounted on the bottom inner wall of the filter box. The partition is arranged in an inverted L shape, and the outer wall of the partition fits with the outer wall of the cover barrel box.

[0011] In a preferred embodiment, a groove is provided on the top of the air compression plate, a thin plate is rotatably installed inside the groove, the thin plate is arranged in a horizontal state, the outer wall of the thin plate and the inner wall of the groove are in contact with each other, a limit block is provided at the bottom of one side of the thin plate, and the limit block is fixedly installed on the inner wall of the groove.

[0012] In a preferred embodiment, the ventilation filter mechanism includes a filter layer fixedly mounted on the outer wall of the partition, the filter layer is arranged in a horizontal state, the outer wall of the filter layer is in contact with the inner wall of the filter box, a baffle plate is provided at the bottom of the filter layer, the baffle plate is fixedly mounted on the inner wall of the filter box, and the baffle plate and the bottom of the filter layer are arranged parallel to each other.

[0013] In a preferred embodiment, a groove is provided in the middle of the baffle plate, a cover plate is provided at the bottom of the groove, the area of ​​the cover plate is larger than the area of ​​the groove, a plurality of sliding rods are fixedly installed on the top of the cover plate, the plurality of sliding rods are slidably installed on the top of the baffle plate, a limit spring is fixedly installed on the top of the slide rods, and the limit spring is fixedly installed on the top of the baffle plate.

[0014] In a preferred embodiment, a reciprocating heating and drying mechanism is provided on the top of the partition, and the reciprocating heating and drying mechanism includes a heating oven body slidably mounted on the inner wall of the filter box, the outer wall of the heating oven body and the inner wall of the filter box are in contact with each other, and a plurality of electric heating plates are provided inside the heating oven body. A guide plate is provided on one side of the heating oven body, and the guide plate is fixedly mounted on the top of the partition, and the guide plate is arranged to be inclined upward.

[0015] In a preferred embodiment, a reciprocating threaded vertical rod is threadedly connected to one side of the heat drying oven body, and the reciprocating threaded vertical rod is rotatably mounted on the top inner wall of the filter box, and a first pulley is fixedly mounted on the bottom of the reciprocating threaded vertical rod, and the first pulley is rotatably mounted on the outer wall of the guide plate, and a synchronous belt is rotatably mounted on the outer wall of the first pulley, and the synchronous belt passes through the inner wall of the guide plate, and the synchronous belt is arranged in a horizontal state, and a second pulley is rotatably mounted on one side of the synchronous belt, and the second pulley is fixedly mounted on the outer wall of the reciprocating threaded rotating rod.

[0016] Technical effects and advantages of the present invention:

[0017] The present invention is to arrange a cover ventilation mechanism and a ventilation filter mechanism in coordination, and to cover the incoming exhaust gas through a cover tube box. At this time, the exhaust gas within a certain range is separated separately and collected and filtered through a pressure plate, so that the treatment of the exhaust gas is intermittent and quantitative and the flow rate can be controlled, that is, a certain amount of exhaust gas is separately transported to the filtering position and then slowly and effectively treated. At the same time, a reciprocating heat drying mechanism is arranged to assist, and the exhaust gas passing through and temporarily retained is heated by a reciprocating electric heating plate, that is, microorganisms such as pathogens that may be contained in the exhaust gas are killed by high temperature, and the microorganisms such as pathogens in the exhaust gas are purified, thereby improving the purification effect of the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is an internal front view of the present invention.

[0020] Figure 3 It is a partial cross-sectional view of the cover ventilation mechanism in the present invention.

[0021] Figure 4 It is a structural schematic diagram of the ventilation and filtering mechanism in the present invention.

[0022] Figure 5 It is a vertical cross-sectional view of the ventilation and filtering mechanism in the present invention.

[0023] Figure 6 It is a schematic diagram of the structure of the reciprocating heat drying mechanism in the present invention.

[0024] Figure 7 It is a vertical cross-sectional view of the reciprocating heat drying mechanism in the present invention.

[0025] The accompanying drawings are marked as follows: 1. filter box; 2. air inlet groove; 3. exhaust port; 4. cover ventilation mechanism; 41. motor; 42. reciprocating threaded rotating rod; 43. air pressure plate; 44. rubber ring; 45. top support column; 46. cover tube box; 47. rubber gasket; 48. partition; 49. thin plate; 410. limit block; 5. ventilation and filtering mechanism; 51. filter layer; 52. barrier plate; 53. cover sealing plate; 54. sliding rod; 55. limit spring; 6. reciprocating heat drying mechanism; 61. heat drying box body; 62. electric heating plate; 63. guide plate; 64. reciprocating threaded vertical rod; 65. first pulley; 66. synchronous belt; 67. second pulley. DETAILED DESCRIPTION

[0026] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0027] Embodiment 1: Refer to the attached specification Figure 1-Figure 7 , laboratory exhaust gas purification device with multi-stage treatment structure, such as Figure 1 and Figure 2 As shown, it comprises a filter box 1, the bottom of one side of the filter box 1 is connected to an air inlet groove 2, the bottom of the other side of the filter box 1 is connected to an exhaust port 3, and a cover ventilation mechanism 4 and a ventilation filter mechanism 5 are arranged inside the filter box 1;

[0028] like Figure 2 and Figure 3As shown, the cover ventilation mechanism 4 includes a motor 41 fixedly mounted on the top inner wall, a reciprocating threaded rotating rod 42 is provided at the bottom of the motor 41, the reciprocating threaded rotating rod 42 is rotatably mounted on the inner wall of the filter box 1, the reciprocating threaded rotating rod 42 is arranged in a vertical state, and an air pressure plate 43 is threadedly connected to the outer wall of the reciprocating threaded rotating rod 42, and the air pressure plate 43 is arranged in a horizontal state;

[0029] The motor 41 drives the reciprocating threaded rotating rod 42 to move the air compression plate 43 downward. A rubber ring 44 is fixedly installed on the outer wall of the air compression plate 43, and the rubber ring 44 is arranged in a horizontal state. A plurality of top supporting columns 45 are fixedly installed on the top of the air compression plate 43, and the plurality of top supporting columns 45 are arranged in a vertical state. Then, the air compression plate 43 drives the rubber ring 44 to move downward synchronously, and the air compression plate 43 drives the plurality of top supporting columns 45 to move downward synchronously.

[0030] like Figure 2 and Figure 3 As shown, the outer wall of the rubber ring 44 is provided with a cover box 46, and the cover box 46 is slidably installed on the inner wall of the filter box 1. The outer wall of the cover box 46 and the inner wall of the filter box 1 fit together, and the inner wall of the cover box 46 and the outer wall of the rubber ring 44 fit together. A rubber gasket 47 is fixedly installed on the bottom outer wall of the cover box 46. The exhaust gas in the cover box 46 is squeezed by the movement of the rubber ring 44, and the cover box 46 covers the exhaust gas in the filter box 1 through its cover structure when it moves downward.

[0031] like Figure 3 As shown, a partition 48 is provided on one side of the cover box 46, and the partition 48 is fixedly mounted on the bottom inner wall of the filter box 1. The partition 48 is arranged in an inverted L shape, and the outer wall of the partition 48 fits with the outer wall of the cover box 46. The partition 48 allows the cover box 46 to move to cover part of the exhaust gas and separate it from the outside, and the partition 48 allows the cover box 46 that moves upward to be restricted and stop moving.

[0032] like Figure 3 As shown, a groove is provided at the top of the air compressor plate 43, and a thin plate 49 is rotatably installed inside the groove. The thin plate 49 is arranged in a horizontal state, and the outer wall of the thin plate 49 fits with the inner wall of the groove. A limit block 410 is provided at the bottom of one side of the thin plate 49, and the limit block 410 is fixedly installed on the inner wall of the groove. The exhaust gas can pass through the groove provided at the top of the air compressor plate 43 when it moves downward, that is, the exhaust gas pushes open the thin plate 49 through pressure, and when the air compressor plate 43 moves upward, the thin plate 49 is blocked by the limit block 410 and the groove is sealed, that is, the air compressor plate 43 drives the rubber ring 44 to compress the exhaust gas in the hood box 46 and transport it upward.

[0033] like Figure 4 and Figure 5As shown, the ventilation filtering mechanism 5 includes a filter layer 51 fixedly mounted on the outer wall of the partition 48, the filter layer 51 is arranged in a horizontal state, the outer wall of the filter layer 51 is in contact with the inner wall of the filter box 1, the exhaust gas passing through the filter layer 51 is filtered, and a baffle plate 52 is provided at the bottom of the filter layer 51, the baffle plate 52 is fixedly mounted on the inner wall of the filter box 1, the baffle plate 52 and the bottom of the filter layer 51 are arranged parallel to each other, and the baffle plate 52 can control the passage of the exhaust gas.

[0034] like Figure 4 and Figure 5 As shown, a slot is provided in the middle of the baffle plate 52, and a cover plate 53 is provided at the bottom of the slot. The area of ​​the cover plate 53 is larger than the area of ​​the slot. A plurality of slide bars 54 are fixedly installed on the top of the cover plate 53. The plurality of slide bars 54 are slidably installed on the top of the baffle plate 52. A limit spring 55 is fixedly installed on the top of the plurality of slide bars 54. The limit spring 55 is fixedly installed on the top of the baffle plate 52. When the exhaust gas pressure on the baffle plate 52 is too large, the exhaust gas pushes open the cover plate 53 under the slot, that is, the cover plate 53 compresses the limit spring 55 through the plurality of slide bars 54 to open the slot, so that the exhaust gas can pass normally. When the exhaust gas is squeezed without pressure, the cover plate 53 closes the slot under the action of the limit spring 55, that is, the exhaust gas is retained in the filter box 1.

[0035] like Figure 6 and Figure 7 As shown, a reciprocating heat drying mechanism 6 is provided on the top of the partition 48, and the reciprocating heat drying mechanism 6 includes a heat drying box body 61 slidably mounted on the inner wall of the filter box 1, and the outer wall of the heat drying box body 61 is in contact with the inner wall of the filter box 1, and a plurality of electric heating plates 62 are provided inside the heat drying box body 61. A guide plate 63 is provided on one side of the heat drying box body 61, and the guide plate 63 is fixedly mounted on the top of the partition 48. The guide plate 63 is inclined upward, and the plurality of electric heating plates 62 activated by electricity in the heat drying box body 61 work, and then the plurality of electric heating plates 62 heat and bake the exhaust gas guided by the guide plate 63 at high temperature, thereby killing microorganisms such as pathogens that may be contained in the exhaust gas.

[0036] like Figure 6 and Figure 7As shown, a reciprocating threaded vertical rod 64 is threadedly connected to one side of the heat drying oven body 61, and the reciprocating threaded vertical rod 64 is rotatably installed on the top inner wall of the filter box 1. A first pulley 65 is fixedly installed at the bottom of the reciprocating threaded vertical rod 64, and the first pulley 65 is rotatably installed on the outer wall of the guide plate 63. A synchronous belt 66 is rotatably installed on the outer wall of the first pulley 65, and the synchronous belt 66 penetrates the inner wall of the guide plate 63. The synchronous belt 66 is arranged in a horizontal state, and a second pulley 67 is rotatably installed on one side of the synchronous belt 66. The second pulley 67 is fixedly installed on the outer wall of the reciprocating threaded rotating rod 42. The reciprocating threaded rotating rod 42 rotates to drive the second pulley 67 to drive the first pulley 65 to rotate synchronously with the help of the synchronous belt 66, that is, the first pulley 65 drives the reciprocating threaded vertical rod 64 to rotate synchronously, so that the reciprocating threaded vertical rod 64 drives the heat drying oven body 61 to move reciprocatingly up and down.

[0037] In the specific implementation, the motor 41 first drives the reciprocating threaded rotating rod 42 to move the air pressure plate 43 downward. At this time, the multiple supporting columns 45 driven by the air pressure plate 43 move downward synchronously, that is, the cover box 46 loses the supporting function of the multiple supporting columns 45 and moves downward by gravity, and the cover box 46 covers the exhaust gas passing through the air inlet groove 2 in the filter box 1. When the air pressure plate 43 continues to move downward, the exhaust gas in the cover box 46 is sealed, and the airflow at the position of the baffle plate 52 is sealed due to the cover plate 53, that is, the filter box 1 is in a sealed state. When the air pressure plate 43 moves downward, the exhaust gas pushes open the thin plate 49 and enters the space above the air pressure plate 43;

[0038] When the air compressor plate 43 moves upward through the reciprocating threaded rotating rod 42, the exhaust gas extrusion thin plate 49 above the air compressor plate 43 closes the air compressor plate 43, that is, the air compressor plate 43 can push the exhaust gas from the hood box 46 into the filter box 1, and the extruded exhaust gas pushes the original exhaust gas in the filter box 1 to push open the cover sealing plate 53 at the bottom of the baffle plate 52, and the exhaust gas in the original filter box 1 is gradually filtered and discharged through the filter layer 51, and at the same time, the air compressor plate 43 drives the rubber ring 44 to move upward in the hood box 46 to seal and make the bottom of the hood box 46 negative pressure, so that the air compressor plate 43 continues to move upward and drives multiple supporting columns 45 to move upward to lift the hood box 46 again. After the hood box 46 moves up to a certain position, it is restricted by the partition 48. At this time, the exhaust gas in the hood box 46 is continuously squeezed and discharged, and the bottom of the hood box 46, that is, the area at the bottom of the filter box 1, sucks in the exhaust gas again due to the negative pressure to complete the circulation process;

[0039] At the same time, the reciprocating threaded rotating rod 42 rotates to drive the second pulley 67 to drive the first pulley 65 to rotate synchronously with the help of the synchronous belt 66, that is, the first pulley 65 drives the reciprocating threaded vertical rod 64 to rotate synchronously, and the reciprocating threaded vertical rod 64 drives the hot drying box body 61 to move back and forth up and down, and the multiple electric heating plates 62 started in the hot drying box body 61 are used to heat and bake the exhaust gas guided by the guide plate 63 and the exhaust gas retained in the filter box 1 at high temperature, so as to kill microorganisms such as pathogens that may be contained in the exhaust gas.

[0040] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0041] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0042] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A laboratory waste gas purification device with a multi-stage treatment structure, comprising a filter box (1), wherein the bottom of one side of the filter box (1) is connected to an air inlet groove (2), and the bottom of the other side of the filter box (1) is connected to an exhaust port (3), characterized in that: The filter box (1) is provided with a cover ventilation mechanism (4) and a ventilation filtering mechanism (5) inside; The cover ventilation mechanism (4) comprises a motor (41) fixedly mounted on the inner wall of the top, a reciprocating threaded rotating rod (42) is provided at the bottom of the motor (41), the reciprocating threaded rotating rod (42) is rotatably mounted on the inner wall of the filter box (1), the reciprocating threaded rotating rod (42) is arranged in a vertical state, and an outer wall of the reciprocating threaded rotating rod (42) is threadedly connected to a pressure plate (43); The air compression plate (43) is arranged in a horizontal state, a rubber ring (44) is fixedly installed on the outer wall of the air compression plate (43), and the rubber ring (44) is arranged in a horizontal state. A plurality of supporting columns (45) are fixedly installed on the top of the air compression plate (43), and the plurality of supporting columns (45) are arranged in a vertical state.

2. The laboratory waste gas purification device with a multi-stage treatment structure according to claim 1 is characterized in that: The outer wall of the rubber ring (44) is provided with a cover box (46), and the cover box (46) is slidably installed on the inner wall of the filter box (1). The outer wall of the cover box (46) and the inner wall of the filter box (1) are in contact with each other, and the inner wall of the cover box (46) and the outer wall of the rubber ring (44) are in contact with each other. A rubber gasket (47) is fixedly installed on the bottom outer wall of the cover box (46).

3. The laboratory waste gas purification device with a multi-stage treatment structure according to claim 2 is characterized in that: A partition (48) is provided on one side of the cover barrel box (46), and the partition (48) is fixedly mounted on the bottom inner wall of the filter box (1). The partition (48) is arranged in an inverted L shape, and the outer wall of the partition (48) is in contact with the outer wall of the cover barrel box (46).

4. The laboratory waste gas purification device with a multi-stage treatment structure according to claim 1 is characterized in that: A groove is provided at the top of the air compression plate (43), a thin plate (49) is rotatably mounted inside the groove, the thin plate (49) is arranged in a horizontal state, the outer wall of the thin plate (49) is in contact with the inner wall of the groove, a limit block (410) is provided at the bottom of one side of the thin plate (49), and the limit block (410) is fixedly mounted on the inner wall of the groove.

5. The laboratory waste gas purification device with a multi-stage treatment structure according to claim 3 is characterized in that: The ventilation filter mechanism (5) comprises a filter layer (51) fixedly mounted on the outer wall of the partition (48); the filter layer (51) is arranged in a horizontal state; the outer wall of the filter layer (51) is in contact with the inner wall of the filter box (1); a baffle plate (52) is provided at the bottom of the filter layer (51); the baffle plate (52) is fixedly mounted on the inner wall of the filter box (1); the baffle plate (52) and the bottom of the filter layer (51) are arranged parallel to each other.

6. The laboratory waste gas purification device with a multi-stage treatment structure according to claim 5 is characterized in that: A groove is provided in the middle of the blocking plate (52), and a cover plate (53) is provided at the bottom of the groove. The area of ​​the cover plate (53) is larger than the area of ​​the groove. A plurality of sliding rods (54) are fixedly installed on the top of the cover plate (53). The plurality of sliding rods (54) are slidably installed on the top of the blocking plate (52). A limit spring (55) is fixedly installed on the top of the plurality of sliding rods (54), and the limit spring (55) is fixedly installed on the top of the blocking plate (52).

7. The laboratory waste gas purification device with a multi-stage treatment structure according to claim 3 is characterized in that: A reciprocating heat drying mechanism (6) is arranged on the top of the partition (48), and the reciprocating heat drying mechanism (6) comprises a heat drying box body (61) slidably mounted on the inner wall of the filter box (1), the outer wall of the heat drying box body (61) and the inner wall of the filter box (1) are mutually fitted, a plurality of electric heating plates (62) are arranged inside the heat drying box body (61), and a guide plate (63) is arranged on one side of the heat drying box body (61), and the guide plate (63) is fixedly mounted on the top of the partition (48), and the guide plate (63) is arranged to be inclined upward.

8. The laboratory waste gas purification device with a multi-stage treatment structure according to claim 7 is characterized in that: A reciprocating threaded vertical rod (64) is threadedly connected to one side of the heat drying oven body (61), and the reciprocating threaded vertical rod (64) is rotatably mounted on the top inner wall of the filter box (1). A first pulley (65) is fixedly mounted on the bottom of the reciprocating threaded vertical rod (64), and the first pulley (65) is rotatably mounted on the outer wall of the guide plate (63). A synchronous belt (66) is rotatably mounted on the outer wall of the first pulley (65), and the synchronous belt (66) passes through the inner wall of the guide plate (63). The synchronous belt (66) is arranged in a horizontal state. A second pulley (67) is rotatably mounted on one side of the synchronous belt (66), and the second pulley (67) is fixedly mounted on the outer wall of the reciprocating threaded rotating rod (42).

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