CN219401586U - Return air binary channels spray exhaust cabinet under laboratory - Google Patents

Abstract

The utility model belongs to the technical field of laboratory waste gas purification, and relates to a laboratory lower return air double-channel spray exhaust cabinet. A laboratory lower return air binary channels spray exhaust hood, comprising: the operation table top is fixedly provided with a return air duct at the rear side, the top of the return air duct is fixedly provided with a wind collecting cover, and the upper part of the wind collecting cover is fixedly communicated with an exhaust duct. The lower part of the operating table top is fixedly provided with a spraying equipment cabin, a water mist spraying system is fixedly arranged in the spraying equipment cabin, and the output end of the water mist spraying system is fixedly arranged in the return air duct. Through the setting of intelligent control system and vertical sliding door, the purification process in the messenger experiment can be gone on automatically, has avoided the experimenter to purifying system's operation in the experimentation, makes experimenter can concentrate on with the experimentation. And seal operation mesa in the experimentation to avoid the gas that the experiment produced to give off indoor through the operation door, further avoided waste gas to cause the injury to experimenter health.

Description

Return air binary channels spray exhaust cabinet under laboratory

Technical Field

The utility model belongs to the technical field of laboratory waste gas purification, and relates to a lower return air double-channel spray exhaust cabinet for a laboratory.

Background

The fume hood is usually arranged in the laboratory and used for exhausting waste gas (local exhaust air) of the laboratory, and the fume hood can exhaust toxic and harmful gases, peculiar smell, inflammable and explosive gases or dust, corrosive gases, moisture and the like generated in the experimental process out of the laboratory, so that the forced ventilation function is realized.

The application of publication No. CN20404679U provides a lower return air spraying fume chamber, and this fume chamber comprises cabinet body and water smoke spraying system two parts, and water smoke spraying system main part is located the downside of operation panel, is equipped with the operation mesa of being connected with preceding crosspiece on the cabinet body. The operation table top is provided with a lower guide plate, an upper guide plate, a back plate, left and right side plates, a top plate, a lighting tool and a gas collecting device from bottom to top, and an air outlet is arranged between the lower guide plate and the upper guide plate. And a return air duct is arranged between the upper guide plate and the back plate. And a waste liquid recovery groove is arranged between the lower guide plate and the backboard. One side of the top plate is provided with an adjustable door and an upper cover plate. The upper part of the water mist spraying system main body is sequentially provided with a first flow equalizer, a first nozzle, a second flow equalizer, a second nozzle and a water mist recoverer. The utility model uses the lower return air spray type, not only can effectively discharge waste gas, but also can prevent the formation of return acid above the operation table, and can effectively absorb inorganic pointy gas.

But this fume chamber can't seal the reactant in the experimentation, leads to some harmful gas to spill over through adjustable door below, causes the experimenter to inhale. If the adjustable door is closed, the air needed for the experimental procedure cannot be provided.

In order to solve the problems, the utility model provides a laboratory lower return air double-channel spray exhaust cabinet.

Disclosure of Invention

In order to solve the problems in the background technology, the utility model provides a laboratory lower return air double-channel spray exhaust cabinet.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: a laboratory lower return air binary channels spray exhaust hood, comprising: the air conditioner comprises an operation table top, wherein side wall plates are fixedly arranged on two sides of the operation table top, side wall plates are symmetrically arranged on two sides of the operation table top, an air inlet is formed in the top of each side wall plate, and a fresh air outlet is formed in one side of the side wall plate, which is located on the operation table top; the back side of the operation table top is fixedly provided with a back plate, the back plate is vertically and hermetically connected with the side wall plate, the upper parts of the back plate and the side wall plate are fixedly provided with an upper cover plate, the lower part of the upper cover plate is fixedly provided with a top plate, and one end of the top plate far away from the back plate is provided with an up-and-down moving door in a sliding manner; an upper guide plate is fixedly arranged on one side of the top plate, which is close to the back plate; an air return duct is fixedly arranged on one side of the operation table surface, which is close to the back plate, an air outlet is formed in the position, which is close to the lower part of the upper guide plate, of the air return duct, and a lower guide plate is fixedly arranged in the position, which is close to the operation table surface, of the air outlet; the top of the air return duct is fixedly provided with an air collecting cover, and the upper part of the air collecting cover is fixedly communicated with an exhaust duct; the lower part of the operating table top is fixedly provided with a spray equipment cabin, a water mist spray system is fixedly arranged in the spray equipment cabin, and the output end of the water mist spray system is fixedly arranged in the return air duct.

Further, the water mist spraying system comprises a water tank, and the water tank is fixedly arranged in a spraying equipment cabin; the inside of the spray equipment cabin is fixedly provided with a circulating water pump, the input end of the circulating water pump is fixedly connected with the water tank, the output end of the circulating water pump is fixedly communicated with a spray water supply pipe, and one end of the spray water supply pipe, which is far away from the circulating water pump, is fixedly arranged in the air return duct; a first flow equalizer and a second flow equalizer are fixedly arranged in the air return channel, a first nozzle and a second nozzle are correspondingly arranged above the first flow equalizer and the second flow equalizer respectively, and the first nozzle and the second nozzle are communicated with a spraying water supply pipe; the lower part of the return air duct is fixedly provided with a waste liquid recovery tank, the lower part of the waste liquid recovery tank is fixedly communicated with a spraying return pipe, and one end of the spraying return pipe, which is far away from the waste liquid recovery tank, is communicated with the inside of the water tank.

Further, one side of the water tank is fixedly provided with a PH on-line monitor, the input end of the water tank is fixedly communicated with a first dosing tank and a second dosing tank, and the first dosing tank and the second dosing tank are respectively communicated with the water tank through a first dosing pump and a second dosing pump; the lower part of the water tank is fixedly provided with a drain pipe, one end of the drain pipe away from the water tank is fixedly connected with a sewage pump, the output end of the sewage pump is connected with the water tank, the upper part of the water tank is provided with an overflow port, and the lower part of the water tank is provided with a sewage outlet.

Further, a water tank observation window is fixedly arranged at the upper part of the water tank, and a water tank overflow pipe is fixedly arranged at the rear side of the water tank; the upper part of the water tank is fixedly provided with a water tank cover, the outside of the spraying equipment cabin is fixedly provided with a water valve switch, and the water valve switch is communicated with the inside of the water tank.

Further, the front crosspiece is fixedly arranged at the lower part of one end of the operating table surface, which is far away from the backboard, and a cabin door is movably arranged at the position of the spraying equipment cabin, which is close to the front crosspiece.

Further, the lower part of the top plate is fixedly provided with an illuminating lamp, and one side of the side wall plate, which is close to the up-down moving door, is fixedly provided with an operating panel.

Further, the upper cover plate is internally and fixedly provided with an intelligent control system, and the intelligent control system is electrically connected with the up-down movable door, the operation panel, the illuminating lamp, the wind collecting cover, the PH on-line monitor, the first dosing pump, the second dosing pump, the circulating water pump and the sewage pump.

Further, the side wall plate is fixedly provided with a leakage protection socket.

Compared with the prior art, the utility model has the following beneficial effects: through the setting of intelligent control system and vertical sliding door, the purification process in the messenger experiment can be gone on automatically, has avoided the experimenter to purifying system's operation in the experimentation, makes experimenter can concentrate on with the experimentation. And seal operation mesa in the experimentation to avoid the gas that the experiment produced to give off indoor through the operation door, further avoided waste gas to cause the injury to experimenter health.

Drawings

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is a side cross-sectional view of the present utility model;

fig. 3 is a schematic view of the structure of the mist spray system of the present utility model.

In the figure: 1. a back plate; 2. an air outlet; 3. an air return duct; 4. a waste liquid recovery tank; 5. a water mist spraying system; 501. a second nozzle; 502. a second flow equalizer; 503. a first nozzle; 504. a current equalizer I; 505. an overflow pipe of the water tank; 506. a circulating water pump; 507. an overflow port; 508. a sewage outlet; 509. a sewage pump; 510. a drain pipe; 511. PH on-line monitor; 512. a water tank observation window; 513. a water tank cover; 514. spraying a water return pipe; 515. a spray water supply pipe; 516. a first medicine adding box; 517. a dosing pump I; 518. a second medicine adding box; 519. a second dosing pump; 6. a water valve switch; 7. a front rail; 8. leakage protection socket; 9. an operating table; 10. a lower deflector; 11. a vertically movable door; 12. an upper deflector; 13. an operation panel; 14. a top plate; 15. an upper cover plate; 16. an intelligent control system; 17. a lighting lamp; 18. a side wall panel; 19. a wind collecting hood; 20. an air inlet; 21. an exhaust duct; 22. a spray equipment compartment; 23. and (5) a cabin door.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 3, the technical scheme adopted by the utility model is as follows: a laboratory lower return air binary channels spray exhaust hood, comprising: the operation mesa 9, the both sides of operation mesa 9 are fixed to be provided with the side wall board 18, the bilateral symmetry of operation mesa 9 is provided with side wall board 18, air intake 20 has been seted up at side wall board 18 top, the new trend air outlet has been seted up to side wall board 18 one side that is located operation mesa 9, is convenient for provide new air for the experiment. The rear side of operation mesa 9 is fixed and is provided with backplate 1, backplate 1 and side wall board 18 perpendicular sealing connection, backplate 1 and side wall board 18 upper portion are fixed and are provided with upper cover plate 15, upper cover plate 15 lower part is fixed and is provided with roof 14, roof 14 keeps away from backplate 1's one end slip and is provided with vertical movable door 11, and vertical movable door 11's setting can be sealed operation mesa 9 when the experiment, avoids harmful gas to overflow from vertical movable door 11 below to avoid harmful gas to the health of experimenter to produce threat.

An upper deflector 12 is fixedly arranged on one side of the top plate 14 close to the back plate 1. The operation mesa 9 is close to the fixed return air duct 3 that is provided with in one side of backplate 1, the return air duct 3 is close to the position of going up guide plate 12 lower part and has been seted up air exit 2, the fixed guide plate 10 that is provided with in position that is close to operation mesa 9 of air exit 2, and the setting of going up guide plate 10 can make experiment waste gas gather to be convenient for the clearance of waste gas avoids the dead angle of waste gas residue in the experiment cabinet, improves exhaust purification's efficiency. The top of the return air duct 3 is fixedly provided with a wind collecting cover 19, and the upper part of the wind collecting cover 19 is fixedly communicated with an exhaust duct 21. The lower part of the operating table 9 is fixedly provided with a spraying equipment cabin 22, a water mist spraying system 5 is fixedly arranged in the spraying equipment cabin 22, and the output end of the water mist spraying system 5 is fixedly arranged in the air return duct 3. The air collecting cover 19 extracts the air in the air return duct 3, so that the air pressure in the air return duct 3 is reduced, and the air generated by the experiment enters the air return duct 3 through the air outlet 2. Meanwhile, the water mist spraying system 5 in the air return duct 3 sprays liquid medicine to adsorb and purify harmful substances in waste gas, and the purified gas enters the exhaust duct 21 through the air collecting cover 19 and is discharged outdoors.

The water mist spray system 5 comprises a water tank which is fixedly arranged in the spray equipment compartment 22. The inside of the spraying equipment cabin 22 is fixedly provided with a circulating water pump 506, the input end of the circulating water pump 506 is fixedly connected with a water tank, the output end of the circulating water pump 506 is fixedly communicated with a spraying water supply pipe 515, and one end, far away from the circulating water pump 506, of the spraying water supply pipe 515 is fixedly arranged in the air return duct 3. The air return duct 3 is internally and fixedly provided with a first flow equalizer 504 and a second flow equalizer 502, a first nozzle 503 and a second nozzle 501 are correspondingly arranged above the first flow equalizer 504 and the second flow equalizer 502, and the first nozzle 503 and the second nozzle 501 are communicated with the spray water supply pipe 515. The lower part of the return air duct 3 is fixedly provided with a waste liquid recovery tank 4, the lower part of the waste liquid recovery tank 4 is fixedly communicated with a spraying return water pipe 514, and one end of the spraying return water pipe 514 far away from the waste liquid recovery tank 4 is communicated with the inside of the water tank. The circulating water pump 506 pumps out the liquid medicine in the water tank, and sends the liquid medicine to the first nozzle 503 and the second nozzle 501 through the spraying water supply pipe 515, and the waste gas is dispersed after passing through the first flow equalizer 504 and the second flow equalizer 502, so that the gas is fully contacted with the sprayed liquid medicine, and the purification quality of the waste gas is improved effectively.

One side of the water tank is fixedly provided with a PH on-line monitor 511, the input end of the water tank is fixedly communicated with a first dosing tank 516 and a second dosing tank 518, and the first dosing tank 516 and the second dosing tank 518 are respectively communicated with the water tank through a first dosing pump 517 and a second dosing pump 519. The liquid medicine in the water tank is monitored by the PH on-line monitor 511, and then the first dosing pump 517 or the second dosing pump 519 is controlled according to the PH value to be started, so that the corresponding liquid medicine is supplemented in the water tank, and the liquid medicine in the water tank reaches the requirement of purification use. The lower part of the water tank is fixedly provided with a drain pipe 510, one end of the drain pipe 510 away from the water tank is fixedly connected with a sewage pump 509, the output end of the sewage pump 509 is connected with the water tank, the upper part of the water tank is provided with an overflow port 507, and the lower part of the water tank is provided with a sewage outlet 508. After the purification is completed, the impurities in the water tank are required to be pumped out through a sewage pump 509, the pumped impurities are precipitated in the water receiving tank, the redundant water is discharged through an overflow port 507, and the residual impurities are discharged through a sewage outlet 508.

The upper part of the water tank is fixedly provided with a water tank observation window 512, and the rear side of the water tank is fixedly provided with a water tank overflow pipe 505. The upper part of the water tank is fixedly provided with a water tank cover 513, the outside of the spraying equipment cabin 22 is fixedly provided with a water valve switch 6, and the water valve switch 6 is communicated with the inside of the water tank. The water quantity and the water quality in the water tank can be observed in time through the observation window, and water is supplemented through the water valve switch 6.

The front crosspiece 7 is fixedly arranged at the lower part of one end of the operating table 9 far away from the backboard 1, and a cabin door 23 is movably arranged at the position of the spraying equipment cabin 22 close to the front crosspiece 7. The cabin door 23 is arranged to prevent experimental medicines from entering the spraying equipment cabin 22 to damage spraying equipment.

An illuminating lamp 17 is fixedly arranged at the lower part of the top plate 14, and an operation panel 13 is fixedly arranged at one side of the side wall plate 18 close to the up-down moving door 11. The intelligent control system 16 is fixedly arranged in the upper cover plate 15, and the intelligent control system 16 is electrically connected with the up-down moving door 11, the operation panel 13, the illuminating lamp 17, the wind collecting cover 19, the PH on-line monitor 511, the first dosing pump 517, the second dosing pump 519, the circulating water pump 506 and the sewage pump 509. The side wall plate 18 is fixedly provided with a leakage protection socket 8, so that damage to a human body caused by equipment leakage is avoided. The design of the intelligent control system 16 can automatically control the experimental process and the purification process through the operation panel 13, so that the operation of the purification system by an experimenter in the experimental process is avoided, and the experimenter can concentrate on the implementation of the experimental process.

Working principle: in use, the purification required in the experimental procedure is first set by the operation panel 13. After the setting is completed, the intelligent control system 16 controls the first drug adding pump 517 and the second drug adding pump 519 to add drugs into the water tank, and simultaneously opens the water valve switch 6 to add water into the water tank. At the same time, the pH on-line monitor 511 monitors the pH in the tank, and when the pH reaches the desired level, the intelligent control system 16 controls the dosing pump one 517 and the dosing pump two 519 to be turned off. Then the experiment can be performed.

The reaction process of the chemical experiment can close the up-and-down moving door 11, and can avoid harmful gas overflowing from the lower part of the up-and-down moving door 11, thereby avoiding the threat of the harmful gas to the health of experimental personnel. The experimentally generated gas moves upward and is blocked by the top plate 14 and the upper baffle 12. Since the air in the air return duct 3 is drawn out by the air collecting hood 19 at this time, the air pressure near the air outlet 2 is low, so that the air blocked by the top plate 14 and the upper baffle 12 is introduced into the air return duct 3 through the air outlet 2 and passes upward through the first flow equalizer 504 in the air outlet 21, and the air passing through the first flow equalizer 504 is uniformly dispersed.

At the same time, the circulating water pump 506 sends the chemical liquid in the water tank to the first nozzle 503 and the second nozzle 501 through the shower water pipe 515, and ejects the chemical liquid from the first nozzle 503 and the second nozzle 501. The chemical liquid sprayed from the first nozzle 503 can be mixed with the gas passing through the first flow equalizer 504, thereby purifying the gas. The purified gas passes through the second flow equalizer 502 again, and is discharged through the air collecting cover 19 and the exhaust duct 21 after being combined with the liquid medicine sprayed out of the second nozzle 501 for purification. The chemical liquid ejected from the first nozzle 503 and the second nozzle 501 reacts with the gas, and then flows into the waste liquid recovery tank 4, and then flows into the water tank through the shower return pipe 514.

Meanwhile, the PH on-line detector monitors water in the water tank in real time and transmits monitoring data to the intelligent control system 16, and the intelligent control system 16 controls the dosing pump I517 or the dosing pump II 519 to add corresponding drugs into the water tank according to the data so as to enable the water in the water tank to keep good purifying effect.

Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims (8)

1. The utility model provides a return air binary channels spray exhaust cabinet under laboratory which characterized in that includes: the air conditioner comprises an operation table top (9), wherein side wall plates (18) are fixedly arranged on two sides of the operation table top (9), the side wall plates (18) are symmetrically arranged on two sides of the operation table top (9), an air inlet (20) is formed in the top of the side wall plates (18), and a fresh air outlet is formed in one side, located on the operation table top (9), of the side wall plates (18); the back side of the operation table top (9) is fixedly provided with a back plate (1), the back plate (1) is vertically and hermetically connected with a side wall plate (18), the upper parts of the back plate (1) and the side wall plate (18) are fixedly provided with an upper cover plate (15), the lower part of the upper cover plate (15) is fixedly provided with a top plate (14), and one end, far away from the back plate (1), of the top plate (14) is provided with an up-and-down moving door (11) in a sliding manner; an upper guide plate (12) is fixedly arranged on one side of the top plate (14) close to the back plate (1); an air return duct (3) is fixedly arranged on one side, close to the back plate (1), of the operation table top (9), an air outlet (2) is formed in the position, close to the lower part of the upper guide plate (12), of the air return duct (3), and a lower guide plate (10) is fixedly arranged in the position, close to the operation table top (9), of the air outlet (2); the top of the air return duct (3) is fixedly provided with an air collecting cover (19), and the upper part of the air collecting cover (19) is fixedly communicated with an exhaust duct (21); the water mist spraying device is characterized in that a spraying equipment cabin (22) is fixedly arranged at the lower part of the operating table top (9), a water mist spraying system (5) is fixedly arranged in the spraying equipment cabin (22), and the output end of the water mist spraying system (5) is fixedly arranged in the air return duct (3).

2. A laboratory under-return air double-channel spray exhaust cabinet according to claim 1, wherein: the water mist spraying system (5) comprises a water tank, and the water tank is fixedly arranged in a spraying equipment cabin (22); the water tank is characterized in that a circulating water pump (506) is fixedly arranged in the spraying equipment cabin (22), the input end of the circulating water pump (506) is fixedly connected with the water tank, a spraying water supply pipe (515) is fixedly communicated with the output end of the circulating water pump (506), and one end, far away from the circulating water pump (506), of the spraying water supply pipe (515) is fixedly arranged in the air return channel (3); a first flow equalizer (504) and a second flow equalizer (502) are fixedly arranged in the air return duct (3), a first nozzle (503) and a second nozzle (501) are correspondingly arranged above the first flow equalizer (504) and the second flow equalizer (502), and the first nozzle (503) and the second nozzle (501) are communicated with a spraying water supply pipe (515); the lower part of return air channel (3) is fixed to be provided with waste liquid recovery groove (4), the fixed intercommunication in lower part of waste liquid recovery groove (4) has spray wet return (514), the one end that waste liquid recovery groove (4) was kept away from to spray wet return (514) communicates with the water tank is inside.

3. A laboratory under-return air double-channel spray exhaust cabinet according to claim 2, wherein: one side of the water tank is fixedly provided with a PH on-line monitor (511), the input end of the water tank is fixedly communicated with a first dosing tank (516) and a second dosing tank (518), and the first dosing tank (516) and the second dosing tank (518) are respectively communicated with the water tank through a first dosing pump (517) and a second dosing pump (519); the water tank is characterized in that a drain pipe (510) is fixedly arranged at the lower part of the water tank, a drain pump (509) is fixedly connected to one end, away from the water tank, of the drain pipe (510), the output end of the drain pump (509) is connected with the water tank, an overflow port (507) is formed in the upper part of the water tank, and a drain outlet (508) is formed in the lower part of the water tank.

4. A laboratory under-return air double-channel spray exhaust hood according to claim 3, wherein: the upper part of the water tank is fixedly provided with a water tank observation window (512), and the rear side of the water tank is fixedly provided with a water tank overflow pipe (505); the upper part of the water tank is fixedly provided with a water tank cover (513), the outside of the spraying equipment cabin (22) is fixedly provided with a water valve switch (6), and the water valve switch (6) is communicated with the inside of the water tank.

5. A laboratory under-return air double-channel spray exhaust hood according to claim 4, wherein: the front crosspiece (7) is fixedly arranged at the lower part of one end of the operating table top (9) far away from the back plate (1), and a cabin door (23) is movably arranged at the position of the spraying equipment cabin (22) close to the front crosspiece (7).

6. A laboratory under-return air double-channel spray exhaust cabinet according to claim 1, wherein: the illuminating lamp (17) is fixedly arranged at the lower part of the top plate (14), and the operation panel (13) is fixedly arranged at one side of the side wall plate (18) close to the up-down moving door (11).

7. A laboratory under-return air double-channel spray exhaust hood according to claim 6, wherein: the intelligent control system (16) is fixedly arranged in the upper cover plate (15), and the intelligent control system (16) is electrically connected with the up-down moving door (11), the operation panel (13), the illuminating lamp (17), the wind collecting cover (19), the PH on-line monitor (511), the first dosing pump (517), the second dosing pump (519), the circulating water pump (506) and the sewage pump (509).

8. A laboratory under-return air double-channel spray exhaust cabinet according to claim 1, wherein: the side wall plate (18) is fixedly provided with a leakage protection socket (8).