Intermittent discharge ventilation structure based on laboratory waste gas treatment

Abstract

The utility model relates to the technical field of waste gas emission, in particular to an intermittent emission ventilation structure based on laboratory waste gas treatment, which comprises a base, a treatment tank and a treatment box are fixedly mounted at the top of the base, a tank cover and a box cover are respectively mounted on the treatment tank and the treatment box through bolts, and two groups of treatment cavities are formed in the treatment box. A movable frame and a piston block are slidably connected to the interior of each treatment cavity, an activated carbon filter element is detachably mounted on each movable frame, a U-shaped air inlet pipe and a U-shaped air outlet pipe are mounted on the box cover, and a U-shaped connecting pipe is mounted on the treatment box; the experimental waste gas is alternately and intermittently extracted and discharged through the two groups of treatment cavities in the treatment box, and the active carbon filter elements are promoted to be in reciprocating contact with the experimental waste gas in the treatment cavities for multiple times in combination with the movable frames which do reciprocating motion in the treatment cavities, so that the adsorption effect is improved, and the waste gas can be efficiently discharged while the waste gas is efficiently discharged. Organic waste gas in the device can be fully adsorbed and treated.

Description

Technical Field

[0001] This utility model relates to the field of waste gas emission technology, and in particular to an intermittent emission ventilation structure based on laboratory waste gas treatment. Background Technology

[0002] Scientific research experiments are becoming increasingly frequent, and the scale and number of teaching and research laboratories are constantly increasing. At the same time, laboratory pollution problems are becoming more and more prominent. Laboratory organic waste gas pollution is different from that of industrial and mining enterprises. In the past, due to its scattered distribution, small emission volume, and discontinuous nature, it did not receive enough attention. In fact, laboratory waste gas pollution is diverse, with high concentrations, strong toxicity, and small emission volume but great harm. Laboratory waste gas is usually inorganic and organic. Inorganic gases are treated using water spray towers. The waste gas fully contacts the liquid absorbent sprayed down from the top of the tower and is absorbed by the absorbent. Only after meeting the standards can it be discharged. Organic gases are treated using activated carbon adsorption towers. The waste gas fully contacts the activated carbon in the tower and is adsorbed by the activated carbon. Only after meeting the standards can it be discharged.

[0003] For example, the laboratory waste gas mobile emission device disclosed in the prior art (CN218608746U) can simultaneously adsorb and treat inorganic and organic waste gases. However, by adopting the method of adsorbing and treating organic waste gases simultaneously during continuous emission, the activated carbon filter can only adsorb and treat organic waste gases once, making it difficult to achieve sufficient adsorption and resulting in a low treatment effect of organic waste gases.

[0004] To address the aforementioned technical shortcomings, a solution is proposed. Utility Model Content

[0005] The purpose of this invention is to provide an intermittent emission ventilation structure for laboratory waste gas treatment to solve the aforementioned technical defects. This invention uses two sets of treatment chambers in the treatment box to alternately and intermittently extract and discharge experimental waste gas. Combined with the reciprocating motion of the movable frame inside the treatment chamber, the activated carbon filter element is repeatedly contacted with the experimental waste gas in the treatment chamber to improve the adsorption effect. Thus, while the waste gas is discharged efficiently, the organic waste gas inside can be fully adsorbed and treated.

[0006] This can be achieved through the following technical solutions:

[0007] An intermittent emission ventilation structure for laboratory waste gas treatment includes a base. A treatment tank and a treatment box are fixedly installed on the top of the base. A tank cover and a box cover are bolted to the treatment tank and the treatment box, respectively. The treatment box has two treatment chambers inside. A movable frame and a piston block are slidably connected inside each treatment chamber. The movable frame is located between the piston block and the box cover. An activated carbon filter element is detachably installed on the movable frame. A U-shaped air inlet pipe and a U-shaped air outlet pipe for connecting the two treatment chambers are installed on the box cover. A U-shaped connecting pipe for connecting the two treatment chambers is installed on the treatment box.

[0008] Preferably, the U-shaped air inlet pipe is fixedly connected to an air intake pipe one via an air intake three-way valve, and the free end of the air intake pipe one passes through the tank cover and extends into the interior of the processing tank. An air intake pipe two is installed on the tank cover, and the air outlet end of the air intake pipe two is lower than the air inlet end of the air intake pipe one.

[0009] Preferably, the U-shaped air outlet pipe is fixedly connected to an exhaust pipe via an air outlet three-way valve, and a negative pressure fan fixedly connected to the base is installed on the exhaust pipe.

[0010] Preferably, the processing box has a movable groove inside and between the two processing chambers, a movable block is slidably connected in the movable groove, positive magnets are symmetrically installed on both sides of the movable block, and negative magnets are installed on the movable frame.

[0011] Preferably, the movable slot is internally rotatably connected to a reciprocating screw threadedly connected to the movable block, and a motor for driving the reciprocating screw to rotate is bolted to the outer wall of the processing box.

[0012] Preferably, a limiting ring is fixedly connected to the inner wall of the movable frame and to one side of the piston block, and multiple limiting blocks are slidably connected to the inner side wall of the movable frame, with screws threadedly connected to the movable frame rotatably connected to the limiting blocks.

[0013] The beneficial effects of this utility model are as follows:

[0014] This invention first uses a reciprocating screw to drive a movable block in reciprocating motion. Utilizing the magnetic attraction between the positive and negative magnets, the movable frame moves within the corresponding processing chamber, causing the activated carbon filter element on the movable frame to repeatedly contact the experimental waste gas within the processing chamber, thus improving the adsorption effect on the organic waste gas. Then, a negative pressure fan, combined with a three-way exhaust valve, discharges the waste gas from one processing chamber while simultaneously moving an internal piston block. This, along with a U-shaped connecting pipe, drives another piston block in the opposite direction, causing the other processing chamber to simultaneously extract experimental waste gas. Combined with the reciprocating motion of the movable block and the movable frame, the waste gas undergoes alternating intermittent adsorption and discharge, ensuring efficient discharge while simultaneously achieving sufficient adsorption treatment of the organic waste gas within. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings;

[0016] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the internal structure of the processing box of this utility model;

[0019] Figure 4 This is a schematic diagram showing the cooperation between the movable frame and the movable block of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the movable frame of this utility model;

[0021] Figure 6 This is a structural schematic diagram of the box cover of this utility model.

[0022] Legend:

[0023] 1. Base; 11. Processing tank; 12. Tank lid; 13. Suction pipe one; 14. Suction pipe two; 15. Exhaust pipe; 16. Negative pressure fan;

[0024] 2. Processing box; 21. Box cover; 22. Processing chamber; 23. Movable frame; 24. Piston block; 25. Activated carbon filter element; 26. U-shaped air inlet pipe; 27. U-shaped air outlet pipe; 28. U-shaped connecting pipe; 29. ​​Movable groove; 210. Movable block; 211. Positive magnet; 212. Negative magnet; 213. Reciprocating lead screw; 214. Motor; 215. Limiting ring; 216. Limiting block. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1: Please refer to Figure 1 - Figure 6 As shown, the existing technology can only perform single-stage adsorption treatment of organic waste gas, which is difficult to fully adsorb and results in low treatment efficiency. The following solutions can be used to address this problem.

[0027] In this embodiment, the intermittent emission ventilation structure based on laboratory exhaust gas treatment includes a base 1. A treatment tank 11 and a treatment box 2 are fixedly installed on the top of the base 1. The treatment tank 11 and the treatment box 2 respectively treat the inorganic exhaust gas and organic exhaust gas in the laboratory exhaust gas in separate zones. The treatment tank 11 and the treatment box 2 are respectively bolted with a tank cover 12 and a box cover 21. Sealing gaskets are provided between the tank cover 12 and the treatment tank 11, and between the box cover 21 and the treatment box 2, to increase the sealing performance of the two and prevent the laboratory exhaust gas from leaking out during the treatment process. The treatment box 2 has two sets of treatment chambers 22 inside.

[0028] The experimental waste gas is extracted and discharged intermittently through two sets of treatment chambers 22 to extend the residence time of the waste gas in the treatment box 2, thereby achieving a full adsorption effect on the organic waste gas. The interior of each treatment chamber 22 is slidably connected with a movable frame 23 and a piston block 24, and the movable frame 23 is located between the piston block 24 and the box cover 21. An activated carbon filter element 25 is detachably installed on the movable frame 23.

[0029] By moving the movable frame 23 back and forth within the corresponding treatment chamber 22, the activated carbon filter element 25 on the movable frame 23 repeatedly contacts the experimental waste gas in the treatment chamber 22, thereby improving the adsorption effect on organic waste gas. The detachable connection between the movable frame 23 and the activated carbon filter element 25 facilitates the replacement of filter elements whose adsorption effect has decreased due to long-term use. The cover 21 is equipped with a U-shaped air inlet pipe 26 and a U-shaped air outlet pipe 27 for connecting the two sets of treatment chambers 22. The treatment box 2 is equipped with a U-shaped connecting pipe 28 for connecting the two sets of treatment chambers 22.

[0030] The piston block 24 in the treatment chamber 22(a) is initially positioned close to the U-shaped connecting pipe 28, and the piston block 24 in the treatment chamber 22(b) is initially positioned close to the cover 21. When the piston block 24 in the treatment chamber 22(a) moves close to the cover 21, the treated waste gas in the treatment chamber 22(a) is discharged through the U-shaped outlet pipe 27, and the gas in the treatment chamber 22(b) is drawn through the U-shaped connecting pipe 28, causing the piston block 24 in the treatment chamber 22(b) to move synchronously and in opposite directions, causing the treatment chamber 22(b) to draw the experimental waste gas through the U-shaped inlet pipe 26, thereby synchronously realizing alternating intermittent extraction and discharge treatment.

[0031] The U-shaped air inlet pipe 26 is fixedly connected to the first air inlet pipe 13 by an air inlet three-way valve. The air inlet three-way valve causes the first air inlet pipe 13 to alternately communicate with one of the processing chambers 22. The free end of the first air inlet pipe 13 passes through the can cover 12 and extends into the interior of the processing tank 11. The second air inlet pipe 14 is installed on the can cover 12, and the outlet end of the second air inlet pipe 14 is lower than the inlet end of the first air inlet pipe 13.

[0032] The treatment tank 11 is filled with an inorganic waste gas absorbent. The liquid level of the absorbent is located below the air inlet of the suction pipe 13. When the treatment chamber 22 draws in waste gas, the experimental waste gas is drawn into the absorbent through the suction pipe 14. The inorganic waste gas is adsorbed and then drawn into the treatment chamber 22 for organic waste gas treatment.

[0033] The U-shaped exhaust pipe 27 is fixedly connected to the exhaust pipe 15 through the exhaust three-way valve. The exhaust three-way valve causes the exhaust pipe 15 to alternately communicate with one of the processing chambers 22. A negative pressure fan 16 fixedly connected to the base 1 is installed on the exhaust pipe 15.

[0034] The negative pressure fan 16, combined with the exhaust pipe 15 and the three-way valve, discharges the waste gas in one side of the treatment chamber 22, causing the internal piston block 24 to move. In conjunction with the U-shaped connecting pipe 28, it drives another piston block 24 to move in the opposite direction, causing the other treatment chamber 22 to simultaneously extract the experimental waste gas, and perform alternating intermittent adsorption treatment and discharge of the waste gas.

[0035] The processing box 2 has an active groove 29 inside and between the two processing chambers 22 for the reciprocating movement of the active block 210. The active block 210 is slidably connected in the active groove 29. Positive magnets 211 are symmetrically installed on both sides of the active block 210, and negative magnets 212 are installed on the active frame 23.

[0036] The sidewall thickness between the movable slot 29 and the processing cavity 22 is small, which causes the movable block 210 to reciprocate with the positive magnet 211. When the positive magnet 211 and the negative magnet 212 reciprocate, the positive magnet 211 and the negative magnet 212 have a magnetic attraction force, which in turn drives the movable frame 23 to reciprocate within the processing cavity 22. With the help of the magnetic attraction force between the positive magnet 211 and the negative magnet 212, when the piston block 24 and the cover 21 clamp the movable frame 23, such as the position of the movable frame 23 and the piston block 24 within the processing cavity 22(b), interference with the movement of the movable block 210 is avoided, thereby realizing the continuous reciprocating motion of the movable block 210.

[0037] The interior of the movable slot 29 is rotatably connected to a reciprocating screw 213 that is threadedly connected to the movable block 210. A motor 214 for driving the reciprocating screw 213 to rotate is bolted on the outer wall of the processing box 2. The motor 214 drives the reciprocating screw 213 to rotate, and the reciprocating screw 213 drives the movable block 210 to reciprocate within the movable slot 29.

[0038] A limiting ring 215 is fixedly connected to the inner wall of the movable frame 23 and to one side of the piston block 24. Multiple limiting blocks 216 are slidably connected to the inner side wall of the movable frame 23. The activated carbon filter element 25 installed in the movable frame 23 is clamped and fixed by the limiting blocks 216 and the limiting ring 215, so as to realize the fixed installation of the activated carbon filter element 25. A screw that is threaded to the movable frame 23 is rotatably connected to the limiting block 216. The limiting block 216 is connected to the movable frame 23 by the screw, so as to realize the disassembly of the limiting block 216, thereby facilitating the replacement of the activated carbon filter element 25 after long-term use.

[0039] The working process and principle of this utility model are as follows:

[0040] In the process of using this utility model, an inorganic waste gas absorbent is filled into the treatment tank 11, and the liquid level of the absorbent is located below the air inlet end of the suction pipe 13. The negative pressure fan 16, together with the exhaust pipe 15, the three-way valve for air outlet and the U-shaped air outlet pipe 27, discharges the gas in the treatment chamber 22(a), causing the internal piston block 24 to move closer to the box cover 21.

[0041] Gas is drawn from the treatment chamber 22(b) through the U-shaped connecting pipe 28, causing the piston block 24 in the treatment chamber 22(b) to move synchronously and in opposite directions, creating a negative pressure state inside the treatment chamber 22(b). Combined with the U-shaped air inlet pipe 26, the air inlet three-way valve and the first suction pipe 13, gas is drawn from the treatment tank 11, which in turn causes the second suction pipe 14 to draw the experimental waste gas into the absorbent, adsorb the inorganic waste gas and then draw it into the treatment chamber 22(b).

[0042] Motor 214 drives reciprocating screw 213 to rotate, and reciprocating screw 213 drives movable block 210 to reciprocate in movable slot 29. Movable block 210 carries positive magnet 211 to reciprocate. Using the magnetic attraction between positive magnet 211 and negative magnet 212, movable frame 23 is driven to reciprocate in processing chamber 22. Activated carbon filter element 25 on movable frame 23 repeatedly contacts the experimental waste gas in processing chamber 22 to fully adsorb and treat organic waste gas.

[0043] Then, through the three-way valve for exhaust and the U-shaped exhaust pipe 27, the exhaust pipe 15 is connected to the treatment chamber 22(b), and the three-way valve for intake and the U-shaped intake pipe 26 are connected to the intake pipe 13 and the treatment chamber 22(a). The negative pressure fan 16 discharges the treated waste gas in the treatment chamber 22(b), and combined with the reverse movement of the two sets of piston blocks 24, the treatment chamber 22(a) draws in the experimental waste gas, thus performing alternating intermittent extraction and discharge of experimental waste gas.

[0044] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. An intermittent emission ventilation structure for laboratory exhaust gas treatment, comprising a base (1), characterized in that, The base (1) is fixedly installed with a treatment tank (11) and a treatment box (2). The treatment tank (11) and the treatment box (2) are respectively bolted with a tank cover (12) and a box cover (21). The treatment box (2) has two sets of treatment chambers (22) inside. The treatment chambers (22) are slidably connected with a movable frame (23) and a piston block (24). The movable frame (23) is located between the piston block (24) and the box cover (21). The movable frame (23) is detachably installed with an activated carbon filter element (25). The box cover (21) is installed with a U-shaped air inlet pipe (26) and a U-shaped air outlet pipe (27) for connecting the two sets of treatment chambers (22). The treatment box (2) is installed with a U-shaped connecting pipe (28) for connecting the two sets of treatment chambers (22).

2. The intermittent emission ventilation structure based on laboratory exhaust gas treatment according to claim 1, characterized in that, The U-shaped air inlet pipe (26) is fixedly connected to the first air inlet pipe (13) by an air inlet three-way valve, and the free end of the first air inlet pipe (13) passes through the can cover (12) and extends into the interior of the processing tank (11). The can cover (12) is equipped with a second air inlet pipe (14), and the outlet end of the second air inlet pipe (14) is lower than the inlet end of the first air inlet pipe (13).

3. The intermittent emission ventilation structure based on laboratory exhaust gas treatment according to claim 1, characterized in that, The U-shaped air outlet pipe (27) is fixedly connected to an exhaust pipe (15) via an exhaust three-way valve, and a negative pressure fan (16) is installed on the exhaust pipe (15) and fixedly connected to the base (1).

4. The intermittent emission ventilation structure based on laboratory exhaust gas treatment according to claim 1, characterized in that, The processing box (2) has an active slot (29) inside and between the two processing chambers (22). An active block (210) is slidably connected in the active slot (29). Positive magnets (211) are symmetrically installed on both sides of the active block (210). A negative magnet (212) is installed on the active frame (23).

5. The intermittent emission ventilation structure based on laboratory exhaust gas treatment according to claim 4, characterized in that, The movable slot (29) is internally rotatably connected to a reciprocating screw (213) threadedly connected to the movable block (210), and a motor (214) for driving the reciprocating screw (213) to rotate is bolted on the outer wall of the processing box (2).

6. The intermittent emission ventilation structure based on laboratory exhaust gas treatment according to claim 1, characterized in that, A limiting ring (215) is fixedly connected to the inner wall of the movable frame (23) and to one side of the piston block (24). Multiple limiting blocks (216) are slidably connected to the inner wall of the movable frame (23). Screws that are threadedly connected to the movable frame (23) are rotatably connected to the limiting blocks (216).

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