Waste gas treatment device for fuming cupboard

Abstract

The utility model relates to the technical field of waste gas treatment of fuming cupboards, and discloses a waste gas treatment device for a fuming cupboard, which comprises a fixed frame, a filter box body is fixedly connected to the fixed frame, and a top cover is arranged at an opening in the top of the filter box body. Dust collected in a dust collecting box is poured out and cleaned, dust on a filter bag can be effectively and conveniently collected, a high-pressure air injection device is started and releases compressed air into a supporting framework through a partition plate, the compressed air impacts on the inner surface of the filter bag, and dust on the inner surface of the filter bag is removed. When the air passes through the filter bag, stubborn dust which is not shaken off on the surface of the filter bag is blown off, the dust on the filter bag can be effectively cleaned in time through operation of the mechanisms, and the problem that the air purification efficiency is low due to the fact that the filter bag is blocked by the attached dust is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fume hood waste gas treatment, in particular to a fume hood waste gas treatment device. Background Art

[0002] Cabinet exhaust hoods are commonly known as fume hoods, which are similar to closed hoods. Small parts spray paint cabinets and chemical laboratory fume hoods are typical structures of cabinet exhaust hoods. Large room-type fume hoods have one side completely open, and operators work inside the cabinet. They are mainly used for large-scale spray painting, powder bagging, etc. When the fume hood is working, a large amount of exhaust gas will be generated. The exhaust gas contains a large amount of harmful substances and tiny dust, which will not only endanger the health of the staff and damage various instruments; but also directly diffuse into the atmosphere and cause environmental pollution. If the exhaust gas is directly discharged into the air, there will be problems of environmental pollution.

[0003] After being used for a period of time, the filter element inside the existing fume hood exhaust treatment equipment will be clogged by tiny dust mixed in the air. It must be replaced frequently to ensure the normal operation of the fume hood air purification. If the filter element is not replaced for a long time, the fume hood air purification efficiency will be low, and even harmful gases with dust and other impurities will be discharged into the fume hood. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the shortcomings of the prior art, the utility model provides an exhaust gas treatment device for a fume hood, which has the advantages of being easy to clean and collect dust and having a good purification effect. It solves the problem that the filter element inside the existing fume hood exhaust gas treatment equipment will be clogged by tiny dust mixed in the air after being used for a period of time, and it must be replaced frequently to ensure the normal operation of the fume hood air purification.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose of facilitating the cleaning and collection of dust and achieving good purification effect, the utility model provides the following technical solutions: an exhaust gas treatment device for a fume hood, comprising a fixed frame, a filter box body is fixedly connected to the fixed frame, a top cover is provided at the top opening of the filter box body, and a suction fan for sucking the exhaust gas of the fume hood into the filter box body is fixedly connected to the fixed frame;

[0008] The air delivery end of the suction fan extends into the filter box, the outer surface of the filter box is fixedly connected with a filter box, and a purification filter element is arranged in the filter box;

[0009] Among them, one end of the filter box away from the filter box is fixedly connected to an exhaust fan for discharging purified air, and the filter box is provided with a dust cleaning and collecting device, which includes a partition plate, which is fixedly connected to the filter box.

[0010] Preferably, the vertical plates on both sides of the opening of the lower surface of the partition plate are rotatably connected with rotating plates, the lower ends of the two rotating plates are rotatably connected with a supporting frame, and the lower surface of the partition plate is fixedly connected with a filter bag.

[0011] Preferably, the filter bag is sleeved on the outer surface of the supporting frame, and a high-pressure jet device for cleaning the filter bag is provided on the top cover, and the high-pressure jet device is located directly above the opening of the partition plate.

[0012] Preferably, a motor is fixedly connected to the outer surface of the filter box, a dust collection box is provided at the bottom opening of the filter box, and a wheel is fixedly sleeved on the outer surface of the output shaft of the motor.

[0013] Preferably, a connecting rod is rotatably connected to the outer surface of the wheel disc near the edge, the connecting rod extends into the filter box, and the connecting rod is rotatably connected to the supporting frame.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides an exhaust gas treatment device for a fume hood, which has the following beneficial effects:

[0016] 1. The exhaust gas treatment device for the fume hood, when the dust on the surface of the filter bag accumulates to a certain extent, by starting the motor, the motor output shaft drives the supporting frame to make a small reciprocating swing, so that the dust and particles attached to the outer surface of the filter bag are shaken off to the bottom of the filter box and fall into the dust collection box. When the dust in the dust collection box accumulates to a certain extent, the dust collected in the dust collection box is poured out and cleaned, so that the dust on the filter bag can be effectively and conveniently collected. By starting the high-pressure jet device, the high-pressure jet device will release compressed air into the supporting frame through the partition plate. The compressed air impacts the inner surface of the filter bag, and blows off the stubborn dust on the surface of the filter bag that has not been shaken off when passing through the filter bag. By setting the operation of the above mechanism, the dust on the filter bag can be cleaned in time and effectively, avoiding the problem of low air purification efficiency caused by the clogging of the filter bag by attached dust.

[0017] 2. The exhaust gas treatment device for the fume hood starts the suction fan, which sucks the air in the fume hood into the filter box. The larger dust particles in the air will fall into the bottom of the filter box due to their own gravity. The air entering the filter box will pass through the filter bag and enter the upper part of the supporting frame. When the air passes through the filter bag, the mixed fine dust and particles therein will be blocked outside by the filter bag. After the air passes through the filter bag and enters the space above the partition plate, the exhaust fan is started, and the exhaust fan sucks the air above the partition plate from the filter box. When passing through the purification filter element in the filter box, the harmful gas and some exhaust gas in the air will be filtered out, and the filtered air will return to the fume hood through the output end of the exhaust fan, thereby completing the air purification cycle of the fume hood. By setting the operation of the above structure, the dust in the air can be effectively intercepted when purifying the ambient air of the fume hood, avoiding the low air purification efficiency caused by the mixed dust in the air blocking the purification filter element in the filter box, and also making the dust in the air better processed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the dust cleaning and collecting device of the utility model.

[0021] In the figure: 1. fixing frame; 2. filter box; 3. dust collecting box; 4. suction fan; 5. top cover; 6. high-pressure jet device; 7. partition plate; 8. rotating plate; 9. supporting frame; 10. filter bag; 11. motor; 12. wheel; 13. connecting rod; 14. filter box; 15. exhaust fan. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3 The utility model provides a new technical solution: an exhaust gas treatment device for a fume hood, comprising a fixing frame 1, a filter box 2 is fixedly connected to the fixing frame 1, a top cover 5 is arranged at the top opening of the filter box 2, and a suction fan 4 for sucking the exhaust gas of the fume hood into the filter box 2 is fixedly connected to the fixing frame 1;

[0024] The air delivery end of the suction fan 4 extends into the filter box 2, and a filter box 14 is fixedly connected to the outer surface of the filter box 2, and a purification filter element is arranged in the filter box 14;

[0025] Among them, one end of the filter box 14 away from the filter box 2 is fixedly connected to an exhaust fan 15 for discharging purified air. The filter box 2 is provided with a dust cleaning and collecting device, which includes a partition plate 7, and the partition plate 7 is fixedly connected in the filter box 2.

[0026] Furthermore, the vertical plates on both sides of the opening of the lower surface of the partition plate 7 are rotatably connected to the rotating plates 8, the lower ends of the two rotating plates 8 are rotatably connected to the supporting frames 9, and the lower surface of the partition plate 7 is fixedly connected to the filter bag 10.

[0027] Furthermore, the filter bag 10 is sleeved on the outer surface of the support frame 9 , and a high-pressure jet device 6 for cleaning the filter bag 10 is provided on the top cover 5 . The high-pressure jet device 6 is located directly above the opening of the partition plate 7 .

[0028] Furthermore, a motor 11 is fixedly connected to the outer surface of the filter box 2, a dust collecting box 3 is provided at the bottom opening of the filter box 2, and a wheel disc 12 is fixedly sleeved on the outer surface of the output shaft of the motor 11.

[0029] Furthermore, a connecting rod 13 is rotatably connected to the outer surface of the wheel disc 12 near the edge. The connecting rod 13 extends into the filter box 2 , and the connecting rod 13 is rotatably connected to the support frame 9 .

[0030] Furthermore, when in use, the suction fan 4 is started, and the suction fan 4 sucks the air in the fume hood into the filter box 2. The larger dust particles in the air will fall to the bottom of the filter box 2 due to their own gravity. The air entering the filter box 2 will pass through the filter bag 10 and enter the upper part of the support frame 9. When the air passes through the filter bag 10, the mixed fine dust and particles will be blocked outside by the filter bag 10. After the air passes through the filter bag 10 and enters the space above the partition plate 7, the exhaust fan 15 is started, and the exhaust fan 15 draws the air above the partition plate 7 from The filter box 14 inhales, and when passing through the purification filter element in the filter box 14, harmful gases and some exhaust gases in the air will be filtered out, and the filtered air returns to the fume hood through the output end of the exhaust fan 15, thereby completing the air purification cycle of the fume hood. By setting the operation of the above structure, dust in the air can be effectively intercepted when purifying the ambient air of the fume hood, avoiding the low air purification efficiency caused by the clogging of the purification filter element in the filter box 14 by mixed dust in the air, and also making it possible to better handle the dust in the air.

[0031] Furthermore, when the dust on the surface of the filter bag 10 accumulates to a certain extent, by starting the motor 11, the output shaft of the motor 11 drives the wheel 12 thereon to rotate. When the wheel 12 rotates, it will drive one end of the connecting rod 13 to rotate about the axis of the motor 11. At the same time, the connecting rod 13 drives the support frame 9 and the filter bag 10 to reciprocate through the other end, so that the support frame 9 makes a small reciprocating swing with the two connection points of the rotating plate 8 as the axis, thereby shaking off the dust and particles attached to the outer surface of the filter bag 10 to the bottom of the filter box 2 and falling into the dust collecting box 3. When the dust in the dust collecting box 3 accumulates to a certain extent, the dust collected in the dust collecting box 3 is poured out and cleaned, so that the dust on the filter bag 10 can be effectively and conveniently collected.

[0032] Furthermore, by starting the high-pressure jet device 6, the high-pressure jet device 6 will release compressed air into the supporting frame 9 through the partition plate 7. The compressed air will impact the inner surface of the filter bag 10, and when passing through the filter bag 10, the stubborn dust that has not been shaken off the surface of the filter bag 10 will be blown off. By setting up the operation of the above mechanism, the dust on the filter bag 10 can be cleaned in time and effectively, avoiding the problem of low air purification efficiency caused by the filter bag 10 being blocked by attached dust.

[0033] Working principle: When in use, the suction fan 4 is started, and the suction fan 4 sucks the air in the fume hood into the filter box 2. The larger dust particles in the air will fall to the bottom of the filter box 2 due to their own gravity. The air entering the filter box 2 will pass through the filter bag 10 and enter the upper part of the support frame 9. When the air passes through the filter bag 10, the mixed fine dust and particles will be blocked outside by the filter bag 10. After the air passes through the filter bag 10 and enters the space above the partition plate 7, the exhaust fan 15 is started, and the exhaust fan 15 draws the air above the partition plate 7 from The filter box 14 inhales, and when passing through the purification filter element in the filter box 14, harmful gases and some exhaust gases in the air will be filtered out, and the filtered air returns to the fume hood through the output end of the exhaust fan 15, thereby completing the air purification cycle of the fume hood. By setting the operation of the above structure, dust in the air can be effectively intercepted when purifying the ambient air of the fume hood, avoiding the low air purification efficiency caused by the clogging of the purification filter element in the filter box 14 by mixed dust in the air, and also making it possible to better handle the dust in the air.

[0034] Furthermore, when the dust on the surface of the filter bag 10 accumulates to a certain extent, by starting the motor 11, the output shaft of the motor 11 drives the wheel 12 thereon to rotate. When the wheel 12 rotates, it will drive one end of the connecting rod 13 to rotate about the axis of the motor 11. At the same time, the connecting rod 13 drives the support frame 9 and the filter bag 10 to reciprocate through the other end, so that the support frame 9 makes a small reciprocating swing with the two connection points of the rotating plate 8 as the axis, thereby shaking off the dust and particles attached to the outer surface of the filter bag 10 to the bottom of the filter box 2 and falling into the dust collecting box 3. When the dust in the dust collecting box 3 accumulates to a certain extent, the dust collected in the dust collecting box 3 is poured out and cleaned, so that the dust on the filter bag 10 can be effectively and conveniently collected.

[0035] Furthermore, by starting the high-pressure jet device 6, the high-pressure jet device 6 will release compressed air into the supporting frame 9 through the partition plate 7. The compressed air will impact the inner surface of the filter bag 10, and when passing through the filter bag 10, the stubborn dust that has not been shaken off the surface of the filter bag 10 will be blown off. By setting up the operation of the above mechanism, the dust on the filter bag 10 can be cleaned in time and effectively, avoiding the problem of low air purification efficiency caused by the filter bag 10 being blocked by attached dust.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An exhaust gas treatment device for a fume hood, comprising a fixing frame (1), characterized in that: The fixing frame (1) is fixedly connected to a filter box (2), a top cover (5) is provided at the top opening of the filter box (2), and a suction fan (4) for sucking exhaust gas from the fume hood into the filter box (2) is fixedly connected to the fixing frame (1); The air delivery end of the suction fan (4) extends into the filter box (2), the outer surface of the filter box (2) is fixedly connected with a filter box (14), and a purification filter element is provided in the filter box (14); An exhaust fan (15) for discharging purified air is fixedly connected to one end of the filter box (14) away from the filter housing (2), and a dust cleaning and collecting device is provided on the filter housing (2). The dust cleaning and collecting device includes a partition plate (7), and the partition plate (7) is fixedly connected to the filter housing (2).

2. The exhaust gas treatment device for a fume hood according to claim 1, characterized in that: The vertical plates on both sides of the opening on the lower surface of the partition plate (7) are rotatably connected to rotating plates (8), the lower ends of the two rotating plates (8) are rotatably connected to support frames (9), and the lower surface of the partition plate (7) is fixedly connected to a filter bag (10).

3. The exhaust gas treatment device for a fume hood according to claim 2, characterized in that: The filter bag (10) is sleeved on the outer surface of the support frame (9), and a high-pressure jet device (6) for cleaning the filter bag (10) is provided on the top cover (5). The high-pressure jet device (6) is located directly above the opening of the partition plate (7).

4. The exhaust gas treatment device for a fume hood according to claim 1, characterized in that: The outer surface of the filter box (2) is fixedly connected to a motor (11), a dust collection box (3) is provided at the bottom opening of the filter box (2), and a wheel disc (12) is fixedly sleeved on the outer surface of the output shaft of the motor (11).

5. The exhaust gas treatment device for a fume hood according to claim 4, characterized in that: The outer surface of the wheel disc (12) is rotatably connected to a connecting rod (13) near the edge. The connecting rod (13) extends into the filter box (2). The connecting rod (13) is rotatably connected to the support frame (9).

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