Gas reaction tail gas absorbing and filtering device

Abstract

The utility model discloses a gas reaction tail gas absorbing and filtering device which comprises a support, a connecting shell is arranged on the support, one side of the connecting shell is communicated with a corrugated pipe, and a gas inlet cover is arranged at the end, away from the connecting shell, of the corrugated pipe. According to the utility model, the filter assembly is arranged, the plurality of U-shaped pipes are matched with the connecting pipe for use, and the flow track of gas is controlled by the electric control valve according to different reaction tail gas, so that a user can absorb the type of the tail gas to be filtered according to needs, and the gas is ensured to pass through a proper filter element and does not need to pass through an unwanted filter element; the tail gas treatment efficiency is ensured, meaningless consumption of the filter element is avoided, the pressurizing fan is used for ensuring the tail gas circulation speed, even if the tail gas needs to be filtered for multiple times, the stable circulation speed can still be kept, and the situation that due to the fact that airflow is small, the absorbing and filtering device does not suck the tail gas into the device in time is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory equipment, in particular to a gas reaction tail gas absorption and filtering device. Background Art

[0002] With the development of the times, people are gradually paying more attention to environmental protection. At present, all units are required to treat laboratory waste gas to prevent exhaust gas from polluting the atmospheric environment. However, unlike industrial scenes, the total amount of exhaust gas generated in laboratories is often small, and there is no need to use large-scale treatment equipment. However, due to different types of experiments, the pollutants contained in the exhaust gas generated by the laboratory are different, which is difficult to treat in a single way.

[0003] In the prior art, in the laboratory gas reaction tail gas absorption and filtration device, according to the different types of tail gas, such as acid mist, alkali mist, oil mist, etc., the adsorption method is adopted, while the high concentration of organic matter waste gas is mainly treated by the condensation method, and chemical absorption or oxidation method is also used to treat some harmful substances. In actual use, chemical absorption is used for treatment, and the neutralization or absorption reagents used are different, and different filter elements need to be used. Users need to replace them according to actual conditions. Some tail gas also contains multiple harmful substances and requires multiple filtrations, which ultimately leads to inconvenience for users. For this reason, we propose a gas reaction tail gas absorption and filtration device to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the problems existing in the prior art and proposes a gas reaction tail gas absorption and filtering device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A gas reaction tail gas absorption and filtering device comprises a bracket, a connecting shell is arranged on the bracket, and one side of the connecting shell is connected to a bellows, an air intake cover is arranged on the end of the bellows away from the connecting shell, an axial flow fan is also arranged in the connecting shell, and a filter assembly is arranged on the side of the connecting shell away from the bellows, wherein:

[0007] The filter assembly includes a connecting pipe, which is connected to a plurality of U-shaped pipes, an electrically controlled valve is provided at the connection between the connecting pipe and the U-shaped pipe, a booster fan is provided in the U-shaped pipe, and an opening is provided on one side of the U-shaped pipe, a door panel for sealing the opening is also provided on the U-shaped pipe, a mounting frame is provided on the inner wall of the U-shaped pipe close to the opening, and an air filter element is placed on the mounting frame, an air outlet is provided at one end of the connecting pipe away from the connecting shell, and an air pollution detector is provided on the inner wall of the connecting pipe close to the air outlet.

[0008] Preferably, the electrically controlled valve comprises a three-way valve and a stop valve, which are respectively arranged at both ends of the U-shaped tube. The three-way valve is arranged at one end of the U-shaped tube close to the connecting shell, and the stop valve is arranged at one end of the U-shaped tube away from the connecting shell.

[0009] Preferably, an observation port is provided on the door panel, and transparent glass is arranged in the observation port.

[0010] Preferably, an extension rod is fixedly connected to the connection shell, and a support frame is slidably connected inside the extension rod. A clamping ring is fixedly connected to one end of the support frame away from the connection shell, and the bellows is clamped with the clamping ring.

[0011] Preferably, a dustproof net is arranged in the connecting shell, and the dustproof net is arranged between the bellows and the axial flow fan.

[0012] Preferably, the inner wall of the air intake hood is provided with a plurality of guide grooves, and the lower end of the air intake hood is provided with a folded edge, and adsorption cotton is placed in the folded edge.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model sets a filter assembly and uses a plurality of U-shaped tubes in conjunction with connecting tubes. According to the different reaction exhaust gases, the flow trajectory of the gas is controlled by an electrically controlled valve, so that the user can absorb and filter the exhaust gas type as needed, ensuring that the gas passes through a suitable filter element without passing through unnecessary filter elements, thereby ensuring the exhaust gas treatment efficiency and avoiding meaningless consumption of the filter element. The booster fan ensures the exhaust gas circulation speed. Even if the exhaust gas needs multiple filtrations, a stable circulation speed can be maintained to avoid the absorption and filtration device failing to suck the exhaust gas into the interior in time due to a small airflow.

[0015] 2. The utility model can quickly replace and install the filter element by setting a door panel in conjunction with the mounting frame. On the other hand, according to the different toxic and harmful substances in the exhaust gas, the position of the filter element can be adjusted according to actual needs, and the filtering and absorption process can be changed to ensure the filtering and purification effect of the exhaust gas. The more complex usage scenarios broaden the exhaust gas treatment scope of this type of absorption and filtering device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a gas reaction tail gas absorption and filtering device proposed by the utility model;

[0017] Figure 2 This is a schematic diagram of a U-shaped tube structure of a gas reaction tail gas absorption and filtering device proposed by the utility model;

[0018] Figure 3This is a schematic diagram of the internal structure of a connecting shell of a gas reaction tail gas absorption and filtering device proposed by the utility model;

[0019] Figure 4 The utility model provides a schematic diagram of the structure of an air intake hood of a gas reaction tail gas absorption and filtering device.

[0020] In the figure: 1. bracket; 2. connecting shell; 3. bellows; 4. air intake hood; 5. axial flow fan; 6. connecting pipe; 7. U-shaped pipe; 8. booster fan; 9. door panel; 10. mounting frame; 11. air filter element; 12. air outlet; 13. three-way valve; 14. stop valve; 15. observation port; 16. extension rod; 17. support frame; 18. retaining ring; 19. dust net; 20. folded edge. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-4 A gas reaction tail gas absorption and filtering device comprises a bracket 1, a connecting shell 2 is arranged on the bracket 1, and a bellows 3 is connected to one side of the connecting shell 2, an air inlet cover 4 is arranged on the end of the bellows 3 away from the connecting shell 2, an axial flow fan 5 is also arranged in the connecting shell 2, and the axial flow fan 5 is used to quickly inhale the laboratory tail gas, and the axial flow fan 5 with a special anti-corrosion material fan blade is required, and a filter component is arranged on the side of the connecting shell 2 away from the bellows 3, wherein:

[0023] The filter assembly includes a connecting pipe 6, which is connected to a plurality of U-shaped tubes 7, an electrically controlled valve is provided at the connection between the connecting pipe 6 and the U-shaped tube 7, a booster fan 8 is provided in the U-shaped tube 7, and an opening is provided on one side of the U-shaped tube 7, a door panel 9 for sealing the opening is also provided on the U-shaped tube 7, a mounting frame 10 is provided on the inner wall of the U-shaped tube 7 near the opening, and an air filter element 11 is placed on the mounting frame 10, an air outlet 12 is provided at one end of the connecting pipe 6 away from the connecting shell 2, and an air pollution detector is provided on the inner wall of the connecting pipe 6 near the air outlet 12.

[0024] Furthermore, the electrically controlled valve includes a three-way valve 13 and a stop valve 14, and the three-way valve 13 and the stop valve 14 are respectively arranged at both ends of the U-shaped tube 7. The three-way valve 13 is arranged at one end of the U-shaped tube 7 close to the connecting shell 2, and the stop valve 14 is arranged at one end of the U-shaped tube 7 away from the connecting shell 2. In this design, the stop valve 14 is arranged to prevent the exhaust gas from flowing back into the U-shaped tube 7 when flowing in the connecting tube 6, causing the unused filter element to be contaminated or the contaminated exhaust gas to be retained in the U-shaped tube 7.

[0025] Furthermore, an observation port 15 is provided on the door panel 9, and transparent glass is arranged in the observation port. This design is mainly used to facilitate the user to observe the use of the filter element.

[0026] Furthermore, an extension rod 16 is fixedly connected to the connecting shell 2, and a support frame 17 is slidably connected inside the extension rod 16. A clamping ring 18 is fixedly connected to the end of the support frame 17 away from the connecting shell 2, and the bellows 3 is clamped with the clamping ring 18. In this design, the position of the bellows 3 can be adjusted by using the extension rod 16 in conjunction with the support frame 17, thereby controlling the position of the air intake hood 4, which is convenient for users to use, and the clamping ring 18 can be clamped at different positions of the bellows 3 to facilitate the up and down adjustment of the position of the air intake hood 4.

[0027] Furthermore, a dustproof net 19 is provided in the connecting shell 2, and the dustproof net 19 is arranged between the bellows 3 and the axial flow fan 5. The dustproof net 19 is used for preliminary filtration of the exhaust gas. Although the laboratory is mostly a dust-free environment, some combustion reactions will produce smoke and even floating fibers, so the dustproof net 19 is arranged to block it.

[0028] Furthermore, the inner wall of the air intake hood 4 is provided with a plurality of guide grooves, and the lower end of the air intake hood 4 is provided with a folded edge 20, and adsorption cotton is placed in the folded edge 20. In this design, mainly part of the exhaust gas will produce oil smoke or water vapor and condense on the inner wall of the air intake hood 4, so the guide groove is provided in conjunction with the adsorption cotton to prevent oil smoke and distilled water from dripping downward along the air intake hood 4.

[0029] Working principle: In this type of Go absorption and filtration device, when conducting experiments that may produce toxic and harmful exhaust gas, the air intake hood 4 is first adjusted to the vicinity of the exhaust gas generation point, and then the electric control valves at different positions are opened and closed according to the components contained in the exhaust gas, so that after the exhaust gas enters the absorption and filtration device, it passes through multiple U-shaped tubes 7 in sequence, and different filter elements are used to absorb and filter the exhaust gas. The booster fan set in the U-shaped tube 7 is used to control the exhaust gas circulation speed to ensure that even if the exhaust gas needs to pass through multiple U-shaped tubes 7, it can maintain a relatively stable circulation speed. Users can also choose to replace different filter elements according to actual needs to target the exhaust gas content. Toxic and harmful components are absorbed and filtered. On the one hand, when there is a single toxic and harmful component in the exhaust gas, a filter element in a U-shaped tube 7 can be used alone to filter the exhaust gas. The treatment requirements of different exhaust gases can be met by controlling the electric control valve. On the other hand, it is also suitable for exhaust gas treatment scenarios with more complex components. It should be noted that the external dimensions of multiple filter elements are the same. Users can also adjust the filtration order according to the exhaust gas composition to avoid damage to the filter element. For example, exhaust gas containing corrosive gases needs to give priority to eliminating corrosive and harmful components. This absorption and filtration device is mainly aimed at laboratory scenarios and meets the needs of various exhaust gas treatments.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gas reaction tail gas absorption and filtering device, characterized in that: The invention comprises a bracket (1), a connecting shell (2) being arranged on the bracket (1), and a bellows (3) being connected to one side of the connecting shell (2), an air inlet cover (4) being arranged on one end of the bellows (3) away from the connecting shell (2), an axial flow fan (5) being arranged inside the connecting shell (2), and a filter assembly being arranged on one side of the connecting shell (2) away from the bellows (3), wherein: The filter assembly comprises a connecting pipe (6), the connecting pipe (6) being connected to a plurality of U-shaped pipes (7), an electrically controlled valve being provided at the connection between the connecting pipe (6) and the U-shaped pipe (7), a booster fan (8) being provided in the U-shaped pipe (7), and an opening being provided on one side of the U-shaped pipe (7), a door plate (9) for sealing the opening being also provided on the U-shaped pipe (7), a mounting frame (10) being provided on the inner wall of the U-shaped pipe (7) close to the opening, and an air filter element (11) being placed on the mounting frame (10), an air outlet (12) being provided at one end of the connecting pipe (6) away from the connecting shell (2), and an air pollution detector being provided on the inner wall of the connecting pipe (6) close to the air outlet (12).

2. A gas reaction tail gas absorption and filtering device according to claim 1, characterized in that: The electrically controlled valve comprises a three-way valve (13) and a stop valve (14), wherein the three-way valve (13) and the stop valve (14) are respectively arranged at two ends of the U-shaped tube (7), wherein the three-way valve (13) is arranged at one end of the U-shaped tube (7) close to the connecting shell (2), and the stop valve (14) is arranged at one end of the U-shaped tube (7) far from the connecting shell (2).

3. A gas reaction tail gas absorption and filtering device according to claim 1, characterized in that: The door panel (9) is provided with an observation port (15), and transparent glass is arranged in the observation port.

4. A gas reaction tail gas absorption and filtering device according to claim 1, characterized in that: An extension rod (16) is fixedly connected to the connection shell (2), and a support frame (17) is slidably connected inside the extension rod (16); a clamping ring (18) is fixedly connected to one end of the support frame (17) away from the connection shell (2), and the bellows (3) is clamped to the clamping ring (18).

5. A gas reaction tail gas absorption and filtering device according to claim 1, characterized in that: A dustproof net (19) is arranged in the connection shell (2), and the dustproof net (19) is arranged between the bellows (3) and the axial flow fan (5).

6. A gas reaction tail gas absorption and filtering device according to claim 1, characterized in that: The inner wall of the air intake hood (4) is provided with a plurality of guide grooves, and the lower end of the air intake hood (4) is provided with a folded edge (20), and adsorption cotton is placed in the folded edge (20).

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