CN218361224U - Perchloric acid fume chamber - Google Patents

Abstract

A perchloric acid fume hood belongs to the field of perchloric acid laboratory ventilation equipment. The method is characterized in that: including last box and lower box, go up box bottom and lower box top fixed connection, upward be provided with the experiment box in the box, go up box and experiment box fixed connection, the experiment window has been seted up on the last box, and experiment window and experiment box inner chamber intercommunication, be provided with waste water storage device in the lower box, waste water storage device and experiment box inner chamber intercommunication, there is the interval between last box and the experiment box, and form exhaust chamber, exhaust chamber communicates with experiment box inner chamber and lower box inner chamber respectively, the inner chamber that is provided with updraft ventilator experiment box on the experiment box passes through exhaust chamber and lower box exhaust device and lower box inner chamber intercommunication, because updraft ventilator's existence in the experiment box, there is pressure differential in experiment box inner chamber and lower box inner chamber, thereby increase the gaseous flow direction experiment box in the lower box, the corrosion phenomenon in the lower box has been reduced, the potential safety hazard has been eliminated.

Description

Perchloric acid fume chamber

Technical Field

A perchloric acid fume hood belongs to the field of perchloric acid laboratory ventilation equipment.

Background

Laboratory ventilation is an integral part of laboratory design. In order for laboratory workers not to inhale or swallow some toxic, pathogenic or non-toxic chemicals and organisms, good ventilation should be provided in the laboratory. To prevent the absorption of some vapors, gases and particulates (smoke, soot, dust and aerosols), the contaminants must be removed by fume hood, ventilation hood or local ventilation. However, besides the safety factor for ensuring sufficient negative pressure in the fume hood, an important risk factor for ensuring safety is that perchloric acid crystals are adhered to the inner wall of the fume hood and the inner wall of the exhaust duct during the experiment. In many metal pretreatment experiments, perchloric acid HClO4 is often used to react with alkali metals, and a large amount of acid mist is generated in the chemical reaction process.

The existing perchloric acid fume hood mainly adopts an upper box body and a lower box body structure, perchloric acid is purified in the upper box body in a water mist mode, and purified liquid contains a large amount of acid and is stored in the lower box body, so that the problem that the perchloric acid is diffused to a guide plate of the fume hood and the inner wall of an exhaust pipeline to crystallize by virtue of wind power of the fume hood is solved, and a crystallization layer can generate the risk of combustion and explosion after encountering water or vibrating or impacting is solved, for example, application numbers 201510175861.8, application days 2015.04.15, patent name of the invention is a safe and energy-saving perchloric acid fume hood.

But because contain a large amount of acid liquid leakproofness and be difficult to solve completely, in perchloric acid fume chamber use, the lower box exists and has acid gas and have the peculiar smell, causes the corruption to box and equipment, has reduced the service life, and in the box was maintained or is changed the raw materials in-process down simultaneously, when operating personnel did not wear the protective articles safely, the gas can cause smell sense, visual damage to operating personnel, has certain potential safety hazard.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: overcome prior art's not enough, provide a lower box and have ventilation function, reduce lower box acid gas and lead to the fact the corruption to box and equipment, increase the perchloric acid fume chamber of service life.

The utility model provides a technical scheme that its technical problem adopted is: a perchloric acid fume chamber, its characterized in that: including last box and lower box, go up box bottom and lower box top fixed connection, upward be provided with the experiment box in the box, go up box and experiment box fixed connection, upward seted up the experiment window on the box, and experiment window and experiment box inner chamber intercommunication, be provided with waste water storage device in the lower box, waste water storage device and experiment box inner chamber intercommunication, it has the interval to go up between box and the experiment box to form the exhaust chamber, the chamber input of airing exhaust communicates with the lower box, chamber output and the experiment box intercommunication of airing exhaust, be provided with updraft ventilator on the experiment box.

Further, be provided with down the box exhaust pipe on the experimental box lateral wall, lower box exhaust pipe input and the chamber intercommunication of airing exhaust, lower box exhaust pipe and experimental box inner chamber intercommunication.

Further, the input of lower box exhaust pipe is raised gradually along the direction of keeping away from experiment box outer wall.

Further, be provided with on the experiment box and be used for with experiment window confined sliding door, but sliding door and experiment box sliding connection still are provided with the air inlet structure on the experiment box, and air inlet structure output and experiment box intercommunication.

Further, be provided with the fixed pulley on the experiment box top, be provided with the balancing weight between experiment box rear side outer wall and the last box inner wall, wire rope walks around the fixed pulley, and both ends connect sliding door and balancing weight respectively.

Further, the air inlet structure includes mounting bracket and support frame, and the mounting bracket is installed in the experiment window, is provided with the support frame between mounting bracket and the experiment window, and the support frame forms inlet air channel, inlet air channel and experimental box inner chamber intercommunication with mounting bracket and experiment window fixed connection respectively between mounting bracket and the experiment window.

Further, be provided with the baffle in the experiment box, go up the baffle setting between updraft ventilator and experiment window to cut apart into the working chamber and purify the chamber with experiment box inner chamber, and working chamber and purification chamber intercommunication.

Further, purification device is arranged in the purification cavity and arranged between the air draft device and the output end of the air exhaust cavity.

Furthermore, a lower partition plate is arranged between the upper partition plate and the experiment box body, the lower partition plate is fixedly connected with the experiment box body, and a space is arranged between the lower partition plate and the upper partition plate.

Compared with the prior art, the technical scheme of the perchloric acid fume chamber has the beneficial effects that:

the acidic liquid that produces during this perchloric acid fume chamber's the internal experiment of experimental box stores in the waste water storage device of box down, because highly acidic liquid hardly seals completely, especially uses the back throughout the year, leads to box inner chamber gas down to have the peculiar smell, and causes the corruption to equipment, has certain potential safety hazard simultaneously. The inner chamber of the experiment box body is communicated with the inner chamber of the lower box body through the exhaust chamber and the lower box body exhaust device, and the experiment box body has pressure difference with the inner chamber of the lower box body due to the existence of the exhaust device, so that the gas flow direction in the lower box body is increased to the experiment box body, the corrosion phenomenon in the lower box body is reduced, and the potential safety hazard is eliminated.

Drawings

Fig. 1 is a schematic front view of a perchloric acid fume hood.

FIG. 2 isbase:Sub>A schematic sectional view taken along line A-A in FIG. 1.

FIG. 3 is a schematic sectional view taken along line B-B in FIG. 1.

Fig. 4 is a schematic cross-sectional view of C-C in fig. 1.

Fig. 5 is an enlarged schematic view D in fig. 2.

Wherein: 1. go up box 2, lower box 3, experiment box 4, working chamber 5, purify chamber 6, go up box exhaust pipe 7, shower nozzle 8, spray pipe 9, go up baffle 10, lower baffle 11, divide water ball 12, lower box exhaust pipe 13, sliding door 14, fixed pulley 15, hand rack 16, mounting bracket 17, support frame 18, purify chamber downcomer 19, working chamber scavenge pipe 20, water purification jar 21, water purification pump 22, lye tank 23, neutralization pump 24, waste water tank 25, PH value detects 26, balancing weight 27, plate valve 28, filter screen 29, controller 30, level sensor 31, the chamber of airing exhaust.

Detailed Description

The present invention will be further described with reference to specific embodiments, however, it should be understood by those skilled in the art that the detailed description given herein with reference to the accompanying drawings is for better explanation and the present invention is necessarily limited to these embodiments, and for some equivalents or common means, will not be described in detail herein but still fall within the scope of the present application.

FIGS. 1 to 5 show preferred embodiments of the present invention, and the present invention will be further described with reference to FIGS. 1 to 5.

As shown in fig. 1-5, the bottom of the upper box body 1 is connected with the top of the lower box body 2 through a bolt, the upper box body is internally provided with an experimental box body 3, the experimental box body 3 is a box body with an open end, an interval is arranged between the experimental box body 3 and the upper box body 1, the experimental box body 3 and the upper box body 1 are fixedly connected through a connecting piece, an exhaust cavity 31 is formed between the rear side wall of the experimental box body 1 and the upper box body 1, both sides of the exhaust cavity 31 are sealed, the bottom of the exhaust cavity 31 is communicated with the inner cavity of the lower box body 2, the experimental window is arranged on the opening side of the experimental box body 1, and the experimental window is blocked by a sliding door mechanism.

The sliding door structure includes sliding door 13, fixed pulley 14 and balancing weight 26, and sliding door 13 sets up between experiment window and experiment box 3, installs the slide on the 3 opening sides of experiment box, and the vertical setting of slide, and the slide is provided with two, and in sliding door 13 both sides stretched into the slide, sliding door 13 closely cooperated with the slide, and sliding door 13 can follow the slide and reciprocate from top to bottom. Fixed pulley 14 sets up on experiment box 3 top outer wall, and fixed pulley 14 is provided with 4, and two fixed pulleys 14 set up respectively at the edge that sets up respectively at experiment box 3 top outer wall for a set of every group about every, and be provided with the synchronizing link between every fixed pulley 14 of group, and the synchronizing link is provided with one in this embodiment. The balancing weight 26 sets up between experiment box 3 rear side outer wall and last box 1 inner wall, installs the slide on the last box 11 of balancing weight 26 both sides, and in the balancing weight 26 both sides stretched into the slide, the vertical setting of slide, the sliding up-and-down reciprocal slip can be followed to balancing weight 26. The sliding door 13 is connected with the counterweight block 26 through two steel wire ropes, the two steel wire ropes are arranged, the steel wire ropes pass around the fixed pulley 14, and two ends of the steel wire ropes are respectively fixedly connected with the sliding door 13 and the counterweight block 26. For better sealing, a sealing plate is additionally arranged on the opening side of the upper box body 1 to plug the opening without influencing the experiment window, the sealing plate is tightly matched with the sliding door 12, and after the experiment window is plugged by the sliding door 12, the top of the sliding door 12 is overlapped with the bottom of the sealing plate. The hand placing frame 15 is installed at the bottom of the sliding door 12, the hand placing frame 15 is fixedly connected with the sliding door 12, and the hand placing frame 15 protrudes outwards, so that the hand placing frame is convenient to grab and attractive.

Mounting bracket 16 and support frame 17 are provided with to sliding door 13 below, and mounting bracket 16 sets up in the bottom of experiment window, and mounting bracket 16 sets up with last box 1 interval, and mounting bracket 16 passes through support frame 17 and last box 1 fixed connection, and 16 one side bulges experiment windows of mounting bracket, and buckles downwards, forms inlet air channel, inlet air channel and working chamber 4 intercommunication between mounting bracket 16 and the last box 1.

Be provided with baffle 9 in the experiment box 3, lower baffle 10, shower nozzle 7, divide water ball 11 and updraft ventilator, go up baffle 9 and set up between 3 opening sides of experiment box and the 3 back lateral walls of experiment box, go up the vertical setting in baffle 9 bottom, go up the slope form of the 9 top of baffle keeping away from the 3 back lateral walls of experiment box gradually, go up baffle 9 top and 3 top fixed connection of experiment box, it has the interval to go up between 9 bottoms of baffle and the 3 bottoms of experiment box, go up 9 both sides of baffle respectively with the 3 left side walls of experiment box and the 3 right side walls fixed connection of experiment box, from this go up baffle 9 and cut apart into working chamber 4 and purification chamber 5 with laboratory 3. A lower partition plate 10 is arranged between the bottom of the upper partition plate 9 and the bottom of the experimental box body 3, the lower partition plate 10 is arranged right opposite to the upper partition plate 9, and a gap is arranged between the upper partition plate 9 and the lower partition plate 10 and used for blocking liquid flowing between the purification cavity 5 and the working cavity 4.

Shower nozzle 7 and water diversion ball 11 all set up in purifying chamber 5, and shower nozzle 7 all sets up in the updraft ventilator below with water diversion ball 11, and shower nozzle 7 sets up in the top of water diversion ball 11, has the interval between shower nozzle 7 and the water diversion ball 11, and shower nozzle 7 sets up down, and the shower nozzle output is connected with spray pipe 8. The water distribution ball 11 is provided with a plurality of water distribution balls, the surface of the water distribution ball 11 is provided with a plurality of fine water distribution belts, and staggered water distribution belts are arranged inside the water distribution balls. The spray head 7 atomizes water and sprays the water downwards, the acid mist moves upwards, the water mist moves downwards to form countercurrent exchange, the acid mist is fully contacted with the water mist, a plurality of fine water distributing belts are arranged on the surface of the water distributing ball 11 below the spray head 7, the water distributing belts are staggered inside the water distributing ball, the adsorption area of the water to the acid mist is increased through the water distributing ball 11, and meanwhile, the adsorption time is also increased, so that a large amount of acid mist is dissolved into the water to achieve the aim of purifying perchloric acid.

Experiment box 3 bottom is provided with water purification chamber liquid collecting vat, purifies chamber downcomer 18 and working chamber downcomer 19, purifies chamber liquid collecting vat and sets up in purifying chamber 5, purifies chamber liquid collecting vat and is recessed cell body for collect the liquid after the purification, purifies chamber liquid collecting vat top and is provided with filtering grille 28, purifies chamber liquid collecting vat bottom and installs and purify chamber collecting pipe 18. The working cavity downcomer 19 is arranged at the bottom of the working cavity 4, and the periphery of the installation position of the working cavity downcomer 19 is concave and is used for collecting liquid in the working cavity 4.

The air draft device comprises an air collecting cover 6, a plate valve 27 and an exhaust fan, wherein the air collecting cover 6 is arranged at the top of the experiment box body 3 and in the purification cavity 5. A plate valve 27 is arranged in the air collecting cover 6, and the output end of the air collecting cover 6 is communicated with an exhaust fan.

Be provided with lower box exhaust pipe 12 on the lateral wall behind experiment box 3, lower box exhaust pipe 12 is both ends open-ended body, and lower box exhaust pipe 12 sets up in 11 below of ball that divides, and is higher than the bottom of last baffle 9, and the input of lower box exhaust pipe 12 and the chamber 31 intercommunication of airing exhaust, the output and the purification chamber 5 intercommunication of lower box exhaust pipe 12. Under the updraft ventilator effect of purifying in the chamber 5, there is pressure differential lower box 2 inner chamber and purifying chamber 5, and lower box 2's inner chamber is gaseous to get into through lower box exhaust pipe 12 and purifies chamber 5, because lower box 2 is gaseous to have acidity, lower box exhaust pipe 12 sets up in the below of dividing water ball 11, and lower box 2 inner chamber is gaseous to be purified together with the gas that working chamber 4 produced. The input end of the lower box body exhaust pipe 12 is far away from the outer wall of the test box body 3 and is lifted gradually, and purified water is prevented from entering the lower box body exhaust pipe 12 and entering the inner cavity of the lower box body 2. The lower box exhaust ducts 12 are provided in plurality under the condition that the power of the exhaust fan allows, and the lower box exhaust ducts 12 are arranged at left and right intervals. In order to discharge the gas of the lower box body 2 into the purification cavity 5 better, the combination of a pipeline and an air draft fan can be adopted, the power of the air exhauster can also be increased, and the pressure difference between the purification cavity 5 and the inner cavity of the lower box body 2 is increased.

Lower 2 one sides of box have been seted up and have been run from opposite directions the door, conveniently maintain the pipeline in the box 2 down and add alkaline liquid, lower box is internal to have set gradually water purification jar 20, water purification pump 21, lye tank 22, neutralization pump 23, waste water tank 24 and controller 29, water purification jar 20 is used for holding clear water, and water purification jar 20 and water intake pipe intercommunication, water purification pump 21 input and water purification jar 20 intercommunication for extract the clear water in the water purification jar, water purification pump 21 output and spray pipe 8 intercommunication. The waste water tank 24 is communicated with the purification cavity sewer pipe 18 and the working cavity 19, a neutralization pump 23 is arranged between the waste water tank 24 and the lye tank 22, the input end of the neutralization pump 23 is communicated with the lye tank 22, and the output end of the neutralization pump 23 is communicated with the waste water tank 24. Liquid level sensor 30 is all installed to water purification jar 20, lye tank 22, waste water jar 24, and liquid level sensor 30 is the non-contact, installs pH value detection device 25 on the waste water jar 24, and each liquid level sensor 30 all is connected with controller 29 signal acquisition end with pH value detection device 25 signal output part, and controller 29 output is connected with water purification pump 21 and neutralization pump 23 respectively.

The specific working process is as follows:

the sliding door 13 slides upwards to remove the blockage of the experiment window, and the counterweight 26 and the fixed pulley 14 cooperate to fix the position of the sliding door 13 in the previous step. When the experiment is started, the exhaust fan is started, and acid mist generated in the experiment process is collected by the air collecting cover 6 and discharged or treated in a centralized manner after passing through the purification cavity 5 from the working cavity 4. The gas in the lower box body 2 enters the purifying cavity 5 through the exhaust pipe 12, passes through a purifying area formed by the spray head 7 and the water dividing ball 11, and is collected by the air collecting cover 6 and discharged or processed in a centralized way. The acid mist of upper and lower box passes through the purification district that shower nozzle 7 and water diversion ball 11 constitute along the way, and shower nozzle 7 atomizes water and sprays downwards, and the acid mist goes upward, and the water mist descends, forms the countercurrent exchange, and the acid mist fully contacts with the water mist to increase the adsorption area of water to the acid mist through water diversion ball 11, also increased the adsorption time simultaneously, thereby make a large amount of acid mist dissolve in the water and reach the target of purifying perchloric acid. The water with the acid mist adsorbed thereon and the liquid in the working chamber 4 enter the waste water tank 24 and are stored in the waste water tank 24. The waste water tank 24 is provided with a pH value detection device 25 for detecting the pH value of the waste water tank 24, the neutralization pump 23 is controlled by the controller 29 to pump the alkaline liquid in the alkaline liquid tank 22 into the waste water tank 24, and the liquid level sensor 30 detects the full state of the waste water tank 24 and then performs centralized treatment.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims (9)

1. A perchloric acid fume chamber, its characterized in that: including last box (1) and lower box (2), go up box (1) bottom and lower box (2) top fixed connection, upward be provided with experiment box (3) in box (1), go up box (1) and experiment box (3) fixed connection, upward seted up the experiment window on box (1), and experiment window and experiment box (3) inner chamber intercommunication, be provided with waste water storage device in lower box (2), waste water storage device and experiment box (3) inner chamber intercommunication, it has the interval to go up between box (1) and experiment box (3), and form exhaust chamber (31), chamber (31) input and lower box (2) intercommunication of airing exhaust, chamber (31) output and experiment box (3) inner chamber intercommunication of airing exhaust, be provided with updraft ventilator on experiment box (3).

2. A perchloric acid fume hood in accordance with claim 1, wherein: be provided with down box exhaust pipe (12) on experiment box (3) lateral wall, lower box exhaust pipe (12) input and air exhaust chamber (31) intercommunication, lower box exhaust pipe (12) and experiment box (3) inner chamber intercommunication.

3. A perchloric acid fume hood in accordance with claim 2, wherein: the input end of the lower box body exhaust pipe (12) is gradually raised along the direction far away from the outer wall of the experiment box body (3).

4. A perchloric acid fume hood in accordance with claim 1, wherein: be provided with on experiment box (3) and be used for with experiment window confined sliding door (13), but sliding door (13) and experiment box (3) sliding connection still are provided with the air inlet structure on experiment box (3), and air inlet structure output and experiment box (3) intercommunication.

5. A perchloric acid fume hood in accordance with claim 4, wherein: the top of the experiment box body (3) is provided with a fixed pulley (14), a balancing weight (26) is arranged between the outer wall of the rear side of the experiment box body (3) and the inner wall of the upper box body (1), a steel wire rope bypasses the fixed pulley (14), and the two ends of the steel wire rope are respectively connected with a sliding door (13) and the balancing weight (26).

6. A perchloric acid fume hood according to claim 4, characterized in that: the air inlet structure includes mounting bracket (16) and support frame (17), and mounting bracket (16) are installed in the experiment window, are provided with support frame (17) between mounting bracket (16) and the experiment window, and support frame (17) respectively with mounting bracket (16) and experiment window fixed connection, form inlet air channel between mounting bracket (16) and the experiment window, inlet air channel and experiment box (3) inner chamber intercommunication.

7. A perchloric acid fume hood in accordance with claim 1, wherein: be provided with in experiment box (3) and go up baffle (9), go up baffle (9) and set up between updraft ventilator and experiment window to cut apart into working chamber (4) and purification chamber (5) with experiment box (3) inner chamber, and working chamber (4) and purification chamber (5) intercommunication.

8. A perchloric acid fume hood in accordance with claim 7, wherein: a purification device is arranged in the purification cavity (5) and is arranged between the air draft device and the output end of the air exhaust cavity (31).

9. A perchloric acid fume hood in accordance with claim 7, wherein: a lower partition plate (10) is arranged between the upper partition plate (9) and the experiment box body (3), the lower partition plate (10) is fixedly connected with the experiment box body (3), and a space is reserved between the lower partition plate (10) and the upper partition plate (9).

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