Laboratory exhaust treatment device

Abstract

This utility model relates to the field of laboratory waste gas treatment, specifically to a laboratory waste gas treatment device, including a filter tube, a flange fixedly connected to the left end of the filter tube, a flame arrester fixedly connected to the outer left wall of the flange, an activated carbon filter frame fixedly connected to the inner wall of the filter tube, and an air supply pipe fixedly connected to the bottom of the filter tube; a treatment tube, a spray assembly installed inside the treatment tube, and a high-efficiency filter fixedly connected to the inner wall of the treatment tube; and a settling bend, the left end of which is fixedly connected to the right end of the filter tube, and the top end of which is fixedly connected to the bottom end of the treatment tube. Through the design of the flow guiding mechanism and auxiliary mechanisms, the waste gas injected into the filter tube can be guided, allowing the waste gas to diffuse evenly on the surface of the activated carbon filter frame, ensuring that the activated carbon filter frame is fully utilized during its service life and effectively avoiding uneven saturation.

Description

Technical Field

[0001] This utility model relates to the field of laboratory waste gas treatment, specifically to a laboratory waste gas treatment device. Background Technology

[0002] Laboratories generate various types of waste gases during chemical experiments, biological cultivation, and other operations. These waste gases are complex in composition and may contain volatile organic compounds, acidic gases, alkaline gases, toxic and harmful gases, etc. If they are directly discharged into the air, they will not only pollute the surrounding environment but may also harm the human respiratory and nervous systems. Therefore, they need to be purified by specialized treatment devices before being discharged.

[0003] Activated carbon filtration is an essential step in waste gas treatment. Activated carbon has a well-developed pore structure and a large specific surface area, enabling it to efficiently adsorb various organic pollutants and odor substances from waste gas through physical adsorption.

[0004] Laboratory exhaust gases are typically directly fed into the treatment device for filtration, resulting in a fixed airflow direction. This fixed airflow direction prevents the exhaust gases from dispersing evenly across the activated carbon filter layer. Over time, this can lead to localized saturation of the activated carbon layer, while areas not covered by the airflow remain underutilized. This not only reduces the efficiency of the activated carbon filter layer but also significantly impacts its lifespan, increasing the frequency and cost of replacement. Therefore, it is essential to invent a laboratory exhaust gas treatment device to address these issues. Utility Model Content

[0005] The purpose of this invention is to provide a laboratory waste gas treatment device. By rotating the bent rod, and in conjunction with the sliding plate and rotating rod, the guide plate can be driven to swing up and down inside the filter tube. The swinging of the guide plate can guide the waste gas injected into the filter tube, so that the waste gas is evenly diffused on the upper and lower sides of the activated carbon filter frame. In this way, the filtration effect of the activated carbon filter frame can be fully utilized. Furthermore, the swinging of the guide plate can guide the waste gas laterally, so that the waste gas is evenly diffused to the left and right sides of the activated carbon filter frame, thereby further improving the coverage of the waste gas on the surface of the activated carbon filter frame. This solves the problem of uneven saturation of activated carbon caused by a fixed flow direction of waste gas.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a laboratory waste gas treatment device, comprising: A filter tube is provided, with a flange fixedly connected to the left end of the filter tube, a flame arrester fixedly connected to the outer left side of the flange, an activated carbon filter frame fixedly connected to the inner wall of the filter tube, and an air supply pipe fixedly connected to the bottom of the filter tube. The treatment pipe is equipped with a spray assembly inside, and a high-efficiency filter is fixedly connected to the inner wall of the treatment pipe. The settling bend has its left end fixedly connected to the right end of the filter pipe, its top end fixedly connected to the bottom end of the treatment pipe, and a water trap pipe fixedly connected to its bottom. The flow guiding mechanism includes a bent rod, both ends of which are fixedly connected to a rotating shaft. A rotating rod is rotatably connected to the inner wall of the filter tube. A flow guiding plate is fixedly connected to the outer wall of the rotating rod. A sliding plate is slidably connected to the inner wall of the flow guiding plate. An auxiliary mechanism is provided inside the flow guiding plate.

[0007] Preferably, the auxiliary mechanism includes a connecting shaft, which is rotatably connected to the inner wall of the guide plate, and a flow guide plate is fixedly connected to the outer wall of the connecting shaft. The inner wall of the rotating rod has an opening.

[0008] Preferably, a connecting rod is hinged to the side wall of the end of the diversion plate away from the connecting shaft, and the end of the connecting rod away from the diversion plate is hinged to the side wall of the slide plate.

[0009] Preferably, a PID sensor, an FID sensor, and a differential pressure sensor are installed sequentially from left to right on the top of the inner wall of the filter tube.

[0010] Preferably, the spray assembly includes a main pipe that runs through and is fixedly connected to the inner wall of the treatment pipe. Both the main pipe and the gas filling pipe are equipped with check valves. At least three sets of branch pipes are fixedly connected to the outer wall of the main pipe along its axial direction, and nozzles are fixedly connected to the bottom of the branch pipes.

[0011] Preferably, the guide plate is provided in two sets, and the openings of the two sets of guide plates are mirror images of each other on the outer wall of the rotating rod. The slide plate is rotatably connected to the outer wall of the curved rod, and the flow guide plate is located between the two sets of guide plates.

[0012] Preferably, the shaft at one end of the bent rod is rotatably connected to the inner wall of the filter tube, and the shaft at the other end of the bent rod passes through the filter tube and is fixedly connected to the output end of the motor. The shaft is rotatably connected to the point where it passes through the filter tube.

[0013] The technical effects and advantages provided by this utility model in the above technical solution are as follows: This invention, through the design of a flow guiding mechanism and an auxiliary mechanism, can guide the waste gas injected into the filter tube, so that the waste gas is evenly diffused on the surface of the activated carbon filter frame, allowing the activated carbon filter frame to be fully utilized during its service life and effectively avoiding uneven saturation. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic cross-sectional view of the present invention. Figure 3 This is a schematic diagram of the exploded structure of this utility model; Figure 4 This is a schematic diagram of the overall structure of the flow guiding mechanism of this utility model; Figure 5 This utility model Figure 4 A schematic diagram of the explosion structure.

[0016] Legend: 1. Filter pipe; 2. Treatment pipe; 3. Settlement bend; 4. Flange; 5. Flow guiding mechanism; 51. Bend; 52. Rotating shaft; 53. Rotating rod; 54. Flow guide plate; 55. Slide plate; 6. Auxiliary mechanism; 61. Connecting shaft; 62. Flow guide plate; 63. Connecting rod; 64. Port; 7. Motor; 8. PID sensor; 9. FID sensor; 10. Differential pressure sensor; 11. Activated carbon filter frame; 12. Spray assembly; 121. Main pipe; 122. Branch pipe; 123. Spray head; 13. Flame arrester; 14. High-efficiency filter; 15. Gas supply pipe; 16. Check valve; 17. Water trap pipe. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0018] This utility model provides, for example Figure 1 - Figure 5 The laboratory exhaust gas treatment device shown includes a filter pipe 1, a treatment pipe 2, a settling bend 3, and a flow guiding mechanism 5. A flange 4 is fixedly connected to the left end of the filter tube 1. A flame arrester 13 is fixedly connected to the outer left side of the flange 4. The flame arrester 13 uses porous material to block the flame and prevents the flame from spreading into the interior of the filter tube 1 through heat dissipation and quenching effects. An activated carbon filter frame 11 is fixedly connected to the inner wall of the filter tube 1. The activated carbon filter frame 11 is bolted to the filter tube 1 so that it can be disassembled and replaced after it is saturated. An air filling pipe 15 is fixedly connected to the bottom of the filter tube 1. When the exhaust gas temperature is higher than 70°, inert gas is injected into the interior of the filter tube 1 through the air filling pipe 15 to prevent the gas from exploding. The treatment pipe 2 is equipped with a spray assembly 12. A high-efficiency filter 14 is fixedly connected to the inner wall of the treatment pipe 2. The high-efficiency filter 14 is bolted to the treatment pipe 2 so that the high-efficiency filter 14 can be replaced. The high-efficiency filter 14 uses ultra-fine fiber filter material, which effectively captures fine particulate matter and residual pollutants through interception and adsorption, and purifies the exhaust gas. The left end of the settling bend 3 is fixedly connected to the right end of the filter pipe 1, the top end of the settling bend 3 is fixedly connected to the bottom end of the treatment pipe 2, and a water trap pipe 17 is fixedly connected to the bottom of the settling bend 3. The water trap pipe 17 can not only discharge the spray liquid to the outside, but also isolate the exhaust gas inside the settling bend 3 to prevent the exhaust gas from leaking to the outside through the water trap pipe 17. The flow guiding mechanism 5 includes a bent rod 51, with rotating shafts 52 fixedly connected to both ends of the bent rod 51. One end of the bent rod 51 is rotatably connected to the inner wall of the filter tube 1, and the other end of the bent rod 51 is connected to the output end of the motor 7 through the filter tube 1. When the motor 7 is started, it drives the rotating shaft 52 to rotate. At this time, the rotating shaft 52 will drive the bent rod 51 to make a circular motion around the rotating shaft 52. The rotating shaft 52 is rotatably connected to the through-hole of the filter tube 1. A rotating rod 53 is rotatably connected to the inner wall of the filter tube 1, and a flow guide plate 54 is fixedly connected to the outer wall of the rotating rod 53. When the bent rod 51 periodically pushes and pulls the sliding plate 55, the sliding plate 55 will push and pull the flow guide plate 54 up and down, causing the flow guide plate 54 to move up and down. The swinging motion drives the rotating rod 53 to reciprocate on the inner wall of the filter tube 1. Two sets of guide plates 54 are provided, with the two sets of guide plates 54 openings 64 mirror images of each other on the outer wall of the rotating rod 53. Through the reciprocating swing of the two sets of guide plates 54, the exhaust gas injected into the filter tube 1 can be guided, so that the exhaust gas is evenly diffused on the upper and lower sides of the activated carbon filter frame 11. The inner wall of the guide plate 54 is slidably connected to the slide plate 55, which is rotatably connected to the outer wall of the bent rod 51. When the bent rod 51 makes a circular motion around the rotating shaft 52, the bent rod 51 will periodically push and pull the slide plate 55, so that the slide plate 55 reciprocates on the inner wall of the guide plate 54. An auxiliary mechanism 6 is provided inside the guide plate 54.

[0019] like Figure 5As shown, the auxiliary mechanism 6 includes a connecting shaft 61, which is rotatably connected to the inner wall of the guide plate 54. A guide plate 62 is fixedly connected to the outer wall of the connecting shaft 61. When the connecting rod 63 pushes and pulls the guide plate 62 back and forth, the guide plate 62 will swing back and forth between the two sets of guide plates 54. Simultaneously, the guide plate 62 will drive the connecting shaft 61 to rotate back and forth on the inner wall of the guide plate 54. The guide plate 62 is located between the two sets of guide plates 54. The reciprocating swing of the guide plate 62 can guide the exhaust gas passing between the two sets of guide plates 54, ensuring the exhaust gas is evenly directed towards the living area. The activated carbon filter frame 11 diffuses on both sides. The inner wall of the rotating rod 53 has an opening 64. When the exhaust gas is injected into the filter tube 1, some of the exhaust gas will pass through the opening 64 and be blown to the surface of the activated carbon filter frame 11 through the gap between the two sets of guide plates 54. The side wall of the guide plate 62 away from the connecting shaft 61 is hinged with a connecting rod 63. The end of the connecting rod 63 away from the guide plate 62 is hinged to the side wall of the slide plate 55. When the slide plate 55 slides back and forth inside the guide plate 54, it will push and pull the connecting rod 63 back and forth, so that the connecting rod 63 pushes and pulls the guide plate 62 back and forth.

[0020] like Figure 2 As shown, from left to right, the top of the inner wall of filter tube 1 is equipped with a PID sensor 8, an FID sensor 9, and a differential pressure sensor 10. The PID sensor 8 uses ultraviolet light to photoionize harmful gases, measures the ion current intensity, and calculates the gas concentration. This allows for automatic switching of the treatment mode based on the waste gas concentration. When the concentration is low, a single-stage adsorption mode (i.e., filtration through the activated carbon filter frame 11) is used, which can effectively reduce equipment energy consumption. When the waste gas concentration is high, a multi-stage linkage filtration mode (i.e., adsorption + catalysis + spraying) is used to improve treatment efficiency. The FID sensor 9 ionizes organic matter in a hydrogen flame, and the current formed by the ions changes with the concentration, thereby detecting the organic matter content in the waste gas and preventing risks. The differential pressure sensor 10 measures the pressure difference inside filter tube 1. When the difference exceeds the threshold, it indicates that the activated carbon filter frame 11 is saturated and needs to be replaced.

[0021] like Figure 3 As shown, the spray assembly 12 includes a main pipe 121, which is connected to the inner wall of the treatment pipe 2. Both the main pipe 121 and the gas filling pipe 15 are equipped with check valves 16. The check valves 16 can prevent the exhaust gas inside the treatment pipe 2 from leaking out through the main pipe 121 and the gas filling pipe 15. At least three sets of branch pipes 122 are fixedly connected to the outer wall of the main pipe 121 along its axial direction. Alkaline spray liquid is injected into the main pipe 121, so that the spray liquid enters the interior of the branch pipes 122 through the main pipe 121. The bottom of the branch pipes 122 is fixedly connected with nozzles 123. The spray liquid inside the branch pipes 122 will be sprayed downward through the nozzles 123. By spraying the spray liquid downward, the acidic gas in the exhaust gas can be neutralized, thereby achieving secondary filtration of the exhaust gas.

[0022] The working principle of this utility model is as follows: The laboratory exhaust gas pipe is fixed to the filter pipe 1 via flange 4. When the exhaust gas is injected into the filter pipe 1 through the exhaust gas pipe, the activated carbon layer inside the activated carbon filter frame 11 is used to initially filter the exhaust gas, removing impurities such as toluene and odors. The exhaust gas filtered by the activated carbon filter frame 11 will enter the treatment pipe 2 through the settling bend 3. At the same time, alkaline spray liquid is injected into the main pipe 121, and the spray liquid enters the branch pipe 122 through the main pipe 121. Finally, it is sprayed downward through the nozzle 123. By spraying the spray liquid downward, the acidic gases in the exhaust gas can be neutralized, thus achieving secondary filtration of the exhaust gas. Then, the high-efficiency filter 14 can be used to filter the exhaust gas again, thus achieving tertiary filtration of the exhaust gas and effectively removing harmful substances from the exhaust gas.

[0023] The spray liquid sprayed downwards by nozzle 123 will fall into the interior of settling bend 3. At this time, the liquid inside settling bend 3 will flow into the interior of water trap pipe 17 and finally be discharged outwards through the drain outlet of water trap pipe 17. Meanwhile, since water trap pipe 17 has its own water trap structure, some spray liquid will remain inside water trap pipe 17. The residual spray liquid can be used to seal water trap pipe 17 and prevent the exhaust gas inside settling bend 3 from leaking outwards through water trap pipe 17.

[0024] When the exhaust gas is injected into the filter tube 1, the motor 7 is started to drive the rotating shaft 52 to rotate. At this time, the rotating shaft 52 will drive the bent rod 51 to make a circular motion around the rotating shaft 52. At the same time, the bent rod 51 will periodically push and pull the sliding plate 55, so that the sliding plate 55 slides back and forth on the inner wall of the guide plate 54. Meanwhile, the sliding plate 55 will push and pull the guide plate 54 up and down, so that the guide plate 54 swings up and down and drives the rotating rod 53 to rotate back and forth on the inner wall of the filter tube 1. While the guide plate 54 swings back and forth, it can guide the exhaust gas injected into the filter tube 1, so that the exhaust gas is evenly diffused on the upper and lower sides of the activated carbon filter frame 11, thereby making full use of the activated carbon filter frame 11.

[0025] As the slide plate 55 slides back and forth inside the guide plate 54, it pushes and pulls the connecting rod 63 back and forth, causing the connecting rod 63 to push and pull the guide plate 62 back and forth. This causes the guide plate 62 to swing back and forth between the two sets of guide plates 54. At the same time, the guide plate 62 drives the connecting shaft 61 to rotate back and forth on the inner wall of the guide plate 54. When the exhaust gas is injected into the filter tube 1, some of the exhaust gas passes through the opening 64 and is blown onto the surface of the activated carbon filter frame 11 through the gap between the two sets of guide plates 54. Meanwhile, the back and forth swing of the guide plate 62 can guide the exhaust gas passing between the two sets of guide plates 54, so that the exhaust gas diffuses evenly to the left and right sides of the activated carbon filter frame 11, thereby further improving the coverage of the exhaust gas on the surface of the activated carbon filter frame 11, thereby further improving the utilization rate of the activated carbon filter frame 11, and ensuring that the activated carbon filter frame 11 can be fully utilized during its service life.

[0026] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A laboratory waste gas treatment device, characterized in that, include: A filter tube (1) is fixedly connected to a flange (4) at its left end. A flame arrester (13) is fixedly connected to the outer left side of the flange (4). An activated carbon filter frame (11) is fixedly connected to the inner wall of the filter tube (1). An air supply pipe (15) is fixedly connected to the bottom of the filter tube (1). The processing pipe (2) is equipped with a spray assembly (12) inside, and a high-efficiency filter (14) is fixedly connected to the inner wall of the processing pipe (2). Settling bend (3), the left end of the settling bend (3) is fixedly connected to the right end of the filter pipe (1), the top end of the settling bend (3) is fixedly connected to the bottom end of the treatment pipe (2), and a water trap pipe (17) is fixedly connected to the bottom of the settling bend (3). The flow guiding mechanism (5) includes a bent rod (51), both ends of which are fixedly connected to a rotating shaft (52). The inner wall of the filter tube (1) is rotatably connected to a rotating rod (53). The outer wall of the rotating rod (53) is fixedly connected to a flow guiding plate (54). The inner wall of the flow guiding plate (54) is slidably connected to a sliding plate (55). An auxiliary mechanism (6) is provided inside the flow guiding plate (54).

2. The laboratory waste gas treatment device according to claim 1, characterized in that: The auxiliary mechanism (6) includes a connecting shaft (61), which is rotatably connected to the inner wall of the guide plate (54). A flow guide plate (62) is fixedly connected to the outer wall of the connecting shaft (61), and an opening (64) is provided on the inner wall of the rotating rod (53).

3. The laboratory waste gas treatment device according to claim 2, characterized in that: The end of the diversion plate (62) away from the connecting shaft (61) is hinged to a connecting rod (63), and the end of the connecting rod (63) away from the diversion plate (62) is hinged to the side wall of the slide plate (55).

4. The laboratory waste gas treatment device according to claim 1, characterized in that: The filter tube (1) has a PID sensor (8), an FID sensor (9) and a differential pressure sensor (10) installed on the top of its inner wall from left to right.

5. The laboratory waste gas treatment device according to claim 4, characterized in that: The spray assembly (12) includes a main pipe (121), which is connected to the inner wall of the treatment pipe (2). Both the main pipe (121) and the gas filling pipe (15) are equipped with check valves (16). At least three sets of branch pipes (122) are fixedly connected to the outer wall of the main pipe (121) along its axial direction. Spray nozzles (123) are fixedly connected to the bottom of the branch pipes (122).

6. The laboratory waste gas treatment device according to claim 2, characterized in that: The guide plate (54) is provided in two sets. The openings (64) of the two sets of guide plates (54) are mirror images of the central axis on the outer wall of the rotating rod (53). The slide plate (55) is rotatably connected to the outer wall of the bent rod (51). The guide plate (62) is located between the two sets of guide plates (54).

7. The laboratory waste gas treatment device according to claim 1, characterized in that: The shaft (52) at one end of the bent rod (51) is rotatably connected to the inner wall of the filter tube (1), and the shaft (52) at the other end of the bent rod (51) passes through the filter tube (1) and is fixedly connected to the output end of the motor (7). The shaft (52) is rotatably connected to the point through which the filter tube (1) passes.

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