Fuming cupboard tail gas purification device

Abstract

The utility model relates to the technical field of tail gas purification, in particular to a tail gas purification device for a fuming cupboard, which reduces harmful components in tail gas, can perform secondary treatment, ensures the treatment rate of the harmful components, is convenient to maintain and prolongs the service life of a treatment part. Comprising a treatment box, a vertical partition plate, a transverse partition plate, two bases, an adsorption assembly, a condensation part, a filtering assembly and a purification assembly, the two bases are fixedly installed at the front end and the rear end of the bottom of the treatment box, the vertical partition plate is fixedly installed in the middle of the treatment box, and the transverse partition plate is fixedly installed at the left end of the vertical partition plate; the right side of the vertical partition plate is a condensation cavity, the adsorption cavity is communicated with the condensation cavity, the upper portion of the condensation cavity is communicated with the purification cavity, a medicament solution is contained in the adsorption cavity in the lower portion of the left side in the treatment box, and an adding opening communicated with the adsorption cavity is formed in the front end of the treatment box; the condensation part is installed in the condensation cavity, and a filtering assembly is installed in the purification cavity.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of tail gas purification, in particular to a fume hood tail gas purification device. BACKGROUND

[0002] The fume hood is important equipment in the modern laboratory, on the one hand, can provide different experimental conditions, meet the needs of different experiments, at the same time, can also discharge various tail gas generated in the experimental process in time, ensure the safety of the experimental personnel. Because the raw material used in the experiment is different, and the reaction type is various, in the experimental process, often will produce the tail gas with complex composition, such as containing acid gas, if not handled or improper handling, not only will cause harm to the health of the experimental staff, but also will pollute the environment. The prior art announcement CN206121450U proposes a fume hood tail gas purification device, the device is provided with a reaction pool for containing treatment liquid, the bottom of the reaction pool is provided with an exhaust pipe, the exhaust pipe is provided with an exhaust hole, the exhaust pipe is connected with a gas delivery pipeline, the gas delivery pipeline is connected with the output end of the air extraction mechanism, the input end of the air extraction mechanism is connected with the air inlet pipe, the air inlet pipe is connected with the fume hood pipeline end, the upper portion of the reaction pool is provided with an exhaust port. But the treatment effect is poor, because long time cannot be replaced or cleaned and maintained, easily lead to the efficiency of fume hood waste gas treatment reduces, reduce the service life of the treatment component. SUMMARY

[0003] In order to solve the above technical problems, the utility model provides a fume hood tail gas purification device, which can reduce harmful components in tail gas, can be treated twice, can ensure the treatment rate of harmful components, is convenient to maintain, and can improve the service life of the treatment component.

[0004] The utility model discloses a fume hood tail gas purification device, including processing box, vertical baffle, horizontal baffle, two base, adsorption subassembly, condensing part, filter component and purification subassembly, two base are fixedly installed to the front and rear both ends of processing box bottom, vertical baffle is fixedly installed in the middle part of processing box, and the left end of vertical baffle is fixedly installed with horizontal baffle, and the left part of processing box inner chamber is divided into purification cavity and adsorption cavity in the upper and lower sides, and the right side of vertical baffle is condensing cavity, and adsorption cavity is connected with condensing cavity, and the upper part of condensing cavity is connected with purification cavity, and there is reagent solution in the adsorption cavity of the left lower part of processing box inside, and the front end of processing box is provided with the adding mouth that is connected with adsorption cavity, and condensing part is installed in condensing cavity, and filter component is installed in purification cavity, and purification subassembly is installed on the upper part of processing box and is connected with the output end of purification cavity, the bottom of processing box is supported through two base, guarantees stability, gas enters adsorption cavity and is contacted with reagent solution fully, reduces the harmful component in tail gas, then gas enters condensing cavity, and condensing part can condense the mist in gas, can prevent the mist contained in tail gas from dripping from ventilation pipeline to operation table when condensing, avoids the corrosion damage of operation table and the influence to the processing sample, then filter component can treat waste gas, and waste gas is treated again through purification subassembly, can be treated twice, guarantees the treatment rate of harmful component, thereby reaches the discharge standard, improves the work efficiency of waste gas treatment, is convenient for maintenance simultaneously, improves the service life of processing part.

[0005] Preferably, the adsorption subassembly includes an air inlet tank, an air inlet pipe, a plurality of gas delivery pipes, a liquid pumping pump, a liquid pumping pipe, a spray pipe, and a plurality of spray heads. The air inlet tank is fixedly installed in the middle part of the left side wall of the processing box. The input end of the air inlet tank is connected with the air inlet pipe. The output end of the air inlet tank is connected with the plurality of gas delivery pipes. The output end of the gas delivery pipe extends into the bottom of the adsorption cavity. The liquid pumping pump is installed on the left side wall of the processing box above the air inlet tank. The input end of the liquid pumping pump is connected with the liquid pumping pipe. The input end of the liquid pumping pipe is in communication with the inside of the adsorption cavity. The output end of the liquid pumping pump is connected with the spray pipe. The spray pipe is located above the adsorption cavity. The bottom of the spray pipe is provided with the plurality of spray heads. The tail gas is input into the air inlet tank through the air inlet pipe. The reagent solution in the adsorption cavity is pumped by the liquid pumping pump through the liquid pumping pipe. The reagent solution is then input into the spray pipe and sprayed into the adsorption cavity through the spray heads to dissolve the harmful substances in the gas. The harmful substances in the gas are effectively reduced. The function of waste gas treatment is realized. The efficiency of waste gas treatment is improved.

[0006] Preferably, the condensing component comprises a cooling rod, a plurality of condensing rods, a refrigeration box, a refrigeration device, a first transmission and a double-output motor, the cooling rod is rotatably installed at the bottom of the condensing cavity of the processing box, a plurality of condensing rods are installed on the outer wall of the cooling rod, the refrigeration box is installed at the bottom of the refrigeration box, the bottom of the cooling rod penetrates through the bottom of the processing box and is located inside the refrigeration box, and the bottom of the cooling rod is connected with the output end of the first transmission, the first transmission is installed at the bottom of the refrigeration box, the refrigeration device is installed inside the refrigeration box, the double-output motor is installed at the middle of the bottom end of the processing box, and the right output end of the double-output motor is connected with the input end of the first transmission; the adsorbed tail gas enters the condensing cavity, the refrigeration device is started to cool the cooling rod and the condensing rods, the temperature of the cooling rod and the condensing rods is reduced, the mist contained in the tail gas is condensed on the outer wall of the cooling rod and the condensing rods, and then falls downward, and then the double-output motor is started to drive the cooling rod and the plurality of condensing rods to rotate through the first transmission, so that the cooling rod and the plurality of condensing rods increase the contact area with the tail gas, the condensing effect is ensured, the mist contained in the tail gas is prevented from falling from the ventilation pipeline to the operation table when being condensed, and the corrosion and damage of the operation table and the influence on the processed sample are avoided.

[0007] Preferably, the second transmission, a rotating shaft and a plurality of stirring blades are further included, the second transmission is installed at the left bottom end of the processing box through a support, the input end of the second transmission is connected with the left output end of the double-output motor, the output end of the second transmission is connected with the rotating shaft, the rotating shaft is rotatably installed at the middle of the adsorption cavity, a plurality of stirring blades are uniformly installed on the outer wall of the rotating shaft, and a hollow groove is formed in the middle of the stirring blade; when the double-output motor is started, the rotating shaft is driven to rotate through the second transmission, the plurality of stirring blades are driven to rotate by the rotating shaft, the tail gas can be fully contacted with the medicinal solution installed in the adsorption cavity, the tail gas can be fully contacted with the medicinal solution, and the harmful components in the tail gas are further reduced.

[0008] Preferably, the filtering assembly comprises a plurality of concave insertion grooves, a plurality of sealing insertion blocks, a hygroscopic cotton board layer, an activated carbon board layer, a dry filter plate, a sealing cover plate and a plurality of handles, the upper and lower ends of the purification cavity are installed in the plurality of concave insertion grooves, the sealing insertion blocks are slidably installed in the concave insertion grooves, the upper and lower ends of the hygroscopic cotton board layer, the activated carbon board layer and the dry filter plate are fixedly installed with the sealing insertion blocks, the sealing insertion blocks are slidably installed in the concave insertion grooves, the sealing cover plate is covered on the front end of the purification cavity through screws, the sealing cover plate is provided with a sealing groove, and a plurality of handles are fixedly installed on the front end of the sealing cover plate; the condensed tail gas enters the purification cavity, the moisture in the gas is adsorbed through the hygroscopic cotton board layer, the toxic substances in the gas are then absorbed, and finally the gas is dried, the hygroscopic cotton board layer, the activated carbon board layer and the dry filter plate are slidably inserted in the concave insertion grooves through the sealing insertion blocks, the hygroscopic cotton board layer, the activated carbon board layer and the dry filter plate can be disassembled, which is convenient for replacement and cleaning and facilitates maintenance.

[0009] Preferably, the purification assembly includes an air suction pipe, a communication pipe, a purification box, an air suction pump, a sealing cover plate, two second concave slots, two second sealing slots, an activated carbon adsorption plate and a gas filter plate, the purification box is installed at the top end of the treatment box, the air suction pump is installed on the right side wall of the purification box, two communication pipes are connected to the left side input end of the purification box, the input end of the communication pipe is connected to the air suction pipe, a plurality of air inlet branch pipes are arranged on the communication pipe, the air inlet branch pipes are communicated with the left side of the purification cavity, the second concave slots are fixedly installed on the inner walls of the front and rear ends of the purification box, the second sealing slots are fixedly installed on the front and rear ends of the activated carbon adsorption plate and the gas filter plate, the second sealing slots are slidably inserted into the second concave slots, and the sealing cover plate is sealingly covered on the top of the purification box; the air suction pump is started to suck air in the purification box, the treated gas enters the purification box through the air suction pipe and the communication pipe, and the tail gas is treated again through the activated carbon adsorption plate and the gas filter plate, so that secondary treatment is realized, the treatment rate of harmful components is ensured, the emission standard is reached, and the work efficiency of waste gas treatment is improved.

[0010] Preferably, the purification assembly includes an air suction pipe, a communication pipe, a purification box, an air suction pump, a sealing cover plate, two second concave slots, two second sealing slots, an activated carbon adsorption plate and a gas filter plate, the purification box is installed at the top end of the treatment box, the air suction pump is installed on the right side wall of the purification box, two communication pipes are connected to the left side input end of the purification box, the input end of the communication pipe is connected to the air suction pipe, a plurality of air inlet branch pipes are arranged on the communication pipe, the air inlet branch pipes are communicated with the left side of the purification cavity, the second concave slots are fixedly installed on the inner walls of the front and rear ends of the purification box, the second sealing slots are fixedly installed on the front and rear ends of the activated carbon adsorption plate and the gas filter plate, the second sealing slots are slidably inserted into the second concave slots, and the sealing cover plate is sealingly covered on the top of the purification box; the air suction pump is started to suck air in the purification box, the treated gas enters the purification box through the air suction pipe and the communication pipe, and the tail gas is treated again through the activated carbon adsorption plate and the gas filter plate, so that secondary treatment is realized, the treatment rate of harmful components is ensured, the emission standard is reached, and the work efficiency of waste gas treatment is improved.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: two bases support the bottom of the treatment box, stability is ensured, gas enters the adsorption cavity and is fully contacted with the reagent solution, harmful components in the tail gas are reduced, then the gas enters the condensation cavity, the condensation component can condense the mist in the gas, can prevent the mist contained in the tail gas from dripping from the ventilation duct to the operation table when condensing, avoids corrosion and damage of the operation table and influence on the treated sample, then the filter assembly can treat the waste gas, the waste gas is treated again through the purification assembly, secondary treatment is realized, the treatment rate of harmful components is ensured, the emission standard is reached, the work efficiency of waste gas treatment is improved, maintenance is facilitated, and the service life of the treatment component is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic view of the utility model;

[0013] Figure 2 It is a lower three-dimensional structural schematic view of the utility model;

[0014] Figure 3 It is an internal structural schematic view of the utility model;

[0015] Figure 4 is a local section structure schematic view of the utility model;

[0016] Figure 5 is a left side section structure schematic view of the utility model;

[0017] Figure 6 is a internal structure schematic view of the utility model purification tank;

[0018] Marked in the drawing: 1, processing box;2, vertical partition;3, horizontal partition;4, air inlet box;5, air inlet pipe;6, gas pipe;7, liquid pump;8, liquid pump;9, spray pipe;10, spray head;11, cold rod;12, condensing rod;13, refrigeration box;14, refrigerator;15, first transmission;16, double output motor;17, second transmission;18, rotating shaft;19, stirring blade;20, drain pipe;21, baffle;22, cleaning pipe;23, concave slot;24, sealing plug;25, moisture absorbing cotton board layer;26, activated carbon board layer;27, dry filter plate;28, sealing cover plate;29, handle;30, air suction pipe;31, communication pipe;32, purification tank;33, air suction pump;34, sealing cover plate;35, base;36, second concave slot;37, second sealing slot;38, activated carbon adsorption plate;39, gas filter plate. DETAILED DESCRIPTION

[0019] In order to facilitate understanding the utility model, the utility model will be described more fully below with reference to the relevant drawings. The utility model can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0020] Example 1

[0021] As Figures 1 to 4As shown, the processing box 1 bottom front and rear ends are fixedly installed with two bases 35, the processing box 1 middle is fixedly installed with a vertical partition 2, the vertical partition 2 left end is fixedly installed with a horizontal partition 3, the processing box 1 left part upper and lower sides are divided into a purification cavity and an adsorption cavity, the vertical partition 2 right side is a condensation cavity, the adsorption cavity and the condensation cavity are communicated, the condensation cavity upper part and the purification cavity are communicated, the processing box 1 left side lower part adsorption cavity has a medicament solution, and the processing box 1 front end is provided with an adding port communicated with the adsorption cavity, the gas inlet box 4 is fixedly installed on the processing box 1 left side wall middle, the gas inlet box 4 input end is connected with a gas inlet pipe 5, the gas inlet box 4 output end is connected with multiple gas outlet pipes 6, the gas outlet pipe 6 output end extends into the adsorption cavity bottom, the liquid pump 7 is installed on the processing box 1 left side wall above the gas inlet box 4, the liquid pump 7 input end is connected with a liquid inlet pipe 8, the liquid inlet pipe 8 input end is communicated with the adsorption cavity inside, the liquid pump 7 output end is connected with a spray pipe 9, the spray pipe 9 is located above the adsorption cavity, the spray pipe 9 bottom is installed with multiple spray heads 10, a cold lead rod 11 is rotatably installed on the processing box 1 condensation cavity bottom, multiple condensation rods 12 are installed on the cold lead rod 11 outer wall, a refrigeration box 13 is installed on the cold lead rod 11 bottom, the cold lead rod 11 bottom rotatably penetrates through the processing box 1 bottom and is located inside the refrigeration box 13, and the cold lead rod 11 bottom is connected with the first speed changer 15 output end, the first speed changer 15 is installed on the refrigeration box 13 bottom, the refrigeration box 13 inside is installed with a refrigeration device 14, a double output motor 16 is installed on the processing box 1 bottom end middle, the double output motor 16 right side output end is connected with the first speed changer 15 input end, multiple groups of concave slots 23 are installed on the purification cavity upper and lower ends, sealing insertion blocks 24 are slidably installed in the concave slots 23, the hygroscopic cotton board layer 25, the activated carbon board layer 26 and the dry filter board 27 upper and lower ends are fixedly installed with sealing insertion blocks 24, the sealing insertion blocks 24 are slidably installed in the concave slots 23, a sealing cover plate 28 is covered on the purification cavity front end through screws, the sealing cover plate 28 is provided with a sealing groove, multiple handles 29 are fixedly installed on the sealing cover plate 28 front end;

[0022] The tail gas is input into the air inlet tank 4 through the air inlet pipe 5, and is input into the medicament solution of the adsorption cavity through the air inlet pipe 6, and the liquid pump 7 is started to adsorb the medicament solution through the liquid pump 8, and then is input into the spray pipe 9, and is sprayed into the adsorption cavity through the spray head 10, and the harmful substances in the gas are dissolved, the harmful substances in the gas can be effectively reduced, the function of waste gas treatment is realized, the efficiency of waste gas treatment is improved, the tail gas after adsorption enters the condensation cavity, the refrigeration device 14 is started to cool the cold lead 11 and the condensation rod 12, the temperature of the cold lead 11 and the condensation rod 12 is reduced, the mist contained in the tail gas is condensed on the outer wall of the cold lead 11 and the condensation rod 12, and then falls down, and then the double output motor 16 is started to drive the cold lead 11 and the plurality of condensation rods 12 to rotate through the first speed changer 15, the contact area of the cold lead 11 and the condensation rod 12 with the tail gas is increased, the condensation effect is ensured, the mist contained in the tail gas can be prevented from falling from the ventilation pipe into the operation table when the mist is condensed, the corrosion and damage of the operation table and the influence on the treated sample are avoided, the tail gas after condensation enters the purification cavity, the moisture in the gas is adsorbed through the moisture absorbing cotton board layer 25, then the toxic substances in the gas are absorbed, finally the gas is dried, and the moisture absorbing cotton board layer 25, the activated carbon board layer 26 and the dry filter plate 27 are slidably inserted into the concave slot 23 through the sealing plug block 24, the moisture absorbing cotton board layer 25, the activated carbon board layer 26 and the dry filter plate 27 can be disassembled, and the replacement and cleaning are facilitated, and the maintenance is facilitated.

[0023] Example 2

[0024] As Figure 1 , Figure 4 , Figure 5 and Figure 6As shown, on the basis of embodiment 1, further comprising a second transmission 17 mounted on the left bottom end of the treatment box 1 through a support, the input end of the second transmission 17 is connected with the left output end of the double output motor 16, the output end of the second transmission 17 is connected with a rotating shaft 18, the rotating shaft 18 is rotatably installed in the middle of the adsorption cavity, a plurality of stirring blades 19 are uniformly installed on the outer wall of the rotating shaft 18, a hollow groove is formed in the middle of the stirring blade 19, a purification box 32 is installed at the top end of the treatment box 1, a suction pump 33 is installed on the right side wall of the purification box 32, two communication pipes 31 are connected with the left input end of the purification box 32, the input end of the communication pipe 31 is connected with the suction pipe 30, a plurality of air inlet branch pipes are arranged on the communication pipe 31, the air inlet branch pipes are communicated with the left side of the purification cavity, second recessed slots 36 are fixedly installed on the inner walls of the front and rear ends of the purification box 32, second sealing slots 37 are fixedly installed on the front and rear ends of the activated carbon adsorption plate 38 and the gas filter plate 39, the second sealing slots 37 are slidably inserted into the second recessed slots 36, a sealing cover plate 34 is sealingly covered on the top of the purification box 32, a liquid discharge pipe 20 is connected with the bottom left end of the treatment box 1 and communicated with the adsorption cavity, a cleaning pipe 22 is installed at the bottom right end of the treatment box 1 and communicated with the condensation cavity, and valves are arranged on the liquid discharge pipe 20 and the cleaning pipe 22, and a baffle 21 is obliquely installed on the left inner wall of the condensation cavity;

[0025] When the double output motor 16 is started, the rotating shaft 18 is driven to rotate through the second transmission 17, the plurality of stirring blades 19 are driven to rotate by the rotating shaft 18, so that the exhaust gas can fully contact with the reagent solution in the adsorption cavity, ensuring that the exhaust gas can fully contact with the reagent solution, further reducing the harmful components in the exhaust gas, the suction pump 33 is started to suck the air in the purification box 32, the treated gas enters the purification box 32 through the suction pipe 30 and the communication pipe 31, and the exhaust gas is treated again by the activated carbon adsorption plate 38 and the gas filter plate 39, so that the treatment rate of harmful components can be ensured, thereby meeting the emission standard and improving the working efficiency of waste gas treatment, the reagent solution in the adsorption cavity can be easily discharged and replaced through the liquid discharge pipe 20, the liquid dropped on the bottom of the condensation cavity can be discharged through the cleaning pipe 22, the baffle 21 can block and guide the exhaust gas output from the adsorption cavity, increase the residence time of the exhaust gas in the condensation cavity, and ensure the condensation effect.

[0026] As Figures 1 to 6As shown, the fume hood tail gas purification device of the utility model, in working, through two base 35 to bottom support of processing box 1, tail gas is input to air inlet tank 4 through air inlet pipe 5, input to adsorption cavity's medicament solution through multiple gas conveying pipe 6, start pump 7 through liquid suction pipe 8 to medicament solution adsorption, then input to spray pipe 9, spray head 10 to spray into adsorption cavity, the harmful substance in gas is dissolved, can effectively reduce the harmful substance in gas, realize the function of waste gas treatment, after adsorption, tail gas enters condensing cavity, start refrigerator 14 to cooling rod 11 and condensing rod 12 cooling, make cooling rod 11 and condensing rod 12 temperature reduction, make the mist contained in tail gas condense on the outer wall of cooling rod 11 and condensing rod 12, and drop down, then start double output motor 16 through the first transmission 15 drive cooling rod 11 and multiple condensing rod 12 rotation, make cooling rod 11 and condensing rod 12 increase the contact area with tail gas, guarantee the condensing effect, when starting double output motor 16, through the second transmission 17 drive rotating shaft 18 rotation, rotating shaft 18 drive multiple stirring blade 19 rotation, can make tail gas and the medicament solution filled in adsorption cavity fully contact, ensure that tail gas can fully contact with medicament solution, after condensation, tail gas enters purification cavity, through the adsorption of moisture absorbing cotton board layer 25 to the humidity in gas, then after the absorption of toxic substance in gas, finally after drying treatment to gas, start air pump 33 to the air in purification tank 32, after treatment, gas is through air suction pipe 30 and communication pipe 31 into purification tank 32, through activated carbon adsorption plate 38 and gas filter plate 39 to tail gas again, can be treated twice, through liquid discharge pipe 20, the medicament solution in adsorption cavity is discharged and replaced, cleaning pipe 22 can discharge the liquid that drops in the bottom of condensing cavity, facilitate cleaning.

[0027] The liquid pump 7, the cooling rod 11, the condensing rod 12, the refrigerator 14, the first transmission 15, the double output motor 16, the moisture absorbing cotton board layer 25, the activated carbon plate layer 26, the dry filter plate 27 and the air pump 33 of the fume hood tail gas purification device of the utility model are purchased on the market, and the technical personnel in the industry only needs to install and operate according to the attached instruction manual, without the creative labor of the technical personnel in the field.

[0028] The above is only the preferred embodiment of the utility model, and it should be pointed out that, for ordinary technical personnel in the technical field, without departing from the technical principle of the utility model, a number of improvements and modifications can be made, and these improvements and modifications should be regarded as the protection range of the utility model.

Claims

1. A fume hood exhaust purification device characterized by comprising: The utility model provides a kind of processing box, it include processing box (1), vertical partition (2), horizontal partition (3), two pedestals (35), adsorption component, condensing part, filter component and purification component, two pedestals (35) are fixedly installed in processing box (1) bottom front and back ends, vertical partition (2) is fixedly installed in processing box (1) middle part, horizontal partition (3) is fixedly installed in vertical partition (2) left end, the left part of the inner chamber of processing box (1) is divided into purification cavity and adsorption cavity by upper and lower sides, the right side of vertical partition (2) is condensing cavity, adsorption cavity is communicated with condensing cavity, the upper portion of condensing cavity is communicated with purification cavity, there is medicament solution in the adsorption cavity of the left side lower part of the inside of processing box (1), and processing box (1) front end is provided with and is added with the mouth of communication with adsorption cavity, condensing part is installed in condensing cavity, filter component is installed in purification cavity, purification component is installed on the upper portion of processing box (1), and is communicated with the output end of purification cavity.

2. A fume hood exhaust purification device according to claim 1, wherein Adsorption component includes air inlet tank (4), air inlet pipe (5), multiple gas delivery pipes (6), liquid pump (7), liquid pipe (8), spray pipe (9) and multiple spray heads (10), air inlet tank (4) is fixedly installed in the left side wall middle part of processing box (1), the input end of air inlet tank (4) is connected with air inlet pipe (5), the output end of air inlet tank (4) is connected with multiple gas delivery pipes (6), the output end of gas delivery pipe (6) is inserted into the bottom of adsorption cavity, liquid pump (7) is installed on the left side wall of processing box (1) above air inlet tank (4), the input end of liquid pump (7) is connected with liquid pipe (8), the input end of liquid pipe (8) is communicated with the inside of adsorption cavity, the output end of liquid pump (7) is connected with spray pipe (9), and spray pipe (9) is located above adsorption cavity, and multiple spray heads (10) are installed on the bottom of spray pipe (9).

3. A fume hood exhaust purification device as defined in claim 1, wherein, Condensing part includes cold guide rod (11), multiple condensing rods (12), refrigeration tank (13), refrigeration device (14), first speed variator (15) and double-output motor (16), cold guide rod (11) is rotatably installed in the bottom of the condensing cavity of processing box (1), multiple condensing rods (12) are installed on the outer wall of cold guide rod (11), refrigeration tank (13) is installed on the bottom of refrigeration tank (13), cold guide rod (11) bottom is rotatably through the bottom of processing box (1), located in the inside of refrigeration tank (13), and the bottom of cold guide rod (11) is connected with the output end of first speed variator (15), first speed variator (15) is installed on the bottom of refrigeration tank (13), refrigeration device (14) is installed in the inside of refrigeration tank (13), double-output motor (16) is installed in the middle part of the bottom end of processing box (1), and the left side output end of double-output motor (16) is connected with the input end of first speed variator (15).

4. A fume hood exhaust purification device as claimed in claim 3, wherein, It also includes second speed variator (17), rotating shaft (18) and multiple stirring blades (19), second speed variator (17) is installed on the left side bottom end of processing box (1) by support, the left side output end of double-output motor (16) is connected with the input end of second speed variator (17), rotating shaft (18) is connected with the output end of second speed variator (17), rotating shaft (18) is rotatably installed in the middle part of adsorption cavity, multiple stirring blades (19) are uniformly installed on the outer wall of rotating shaft (18), and hollow groove is formed in the middle part of stirring blade (19).

5. A fume hood exhaust purification device as defined in claim 1, wherein, The filter assembly comprises a plurality of concave slots (23), a plurality of sealing blocks (24), a moisture absorption cotton plate layer (25), an activated carbon plate layer (26), a dry filter plate (27), a sealing cover plate (28) and a plurality of handles (29). The purification cavity is installed at the upper and lower ends of the plurality of concave slots (23). The sealing blocks (24) are slidingly installed in the concave slots (23). The sealing blocks (24) are slidingly installed in the concave slots (23). The sealing cover plate (28) is covered on the front end of the purification cavity by screws. The sealing cover plate (28) is provided with a sealing groove. The sealing cover plate (28) is provided with a sealing groove. The sealing cover plate (28) is provided with a sealing groove. The sealing cover plate (28) is provided with a sealing groove.

6. A fume hood exhaust purification device as defined in claim 1, wherein, The purification assembly comprises an air suction pipe (30), a communication pipe (31), a purification box (32), an air suction pump (33), a sealing cover plate (34), two second concave slots (36), two second sealing blocks (37), an activated carbon adsorption plate (38) and a gas filter plate (39). The purification box (32) is installed at the top end of the treatment box (1). The air suction pump (33) is installed on the right side wall of the purification box (32). The left side of the purification box (32) is connected with two communication pipes (31). The input end of the communication pipe (31) is connected with the air suction pipe (30). A plurality of air inlet branch pipes are arranged on the communication pipe (31). The air inlet branch pipes are communicated with the left side of the purification cavity. The second concave slots (36) are fixedly installed on the inner walls of the front and rear ends of the purification box (32). The second sealing blocks (37) are fixedly installed on the front and rear ends of the activated carbon adsorption plate (38) and the gas filter plate (39). The second sealing blocks (37) are slidingly installed in the second concave slots (36). The sealing cover plate (34) is sealingly covered on the top of the purification box (32).

7. A fume hood exhaust purification device as defined in claim 1, wherein It also comprises a drain pipe (20), a baffle (21) and a cleaning pipe (22). The drain pipe (20) is connected with the inside of the adsorption cavity at the left end of the bottom of the treatment box (1). The cleaning pipe (22) is installed at the right end of the bottom of the treatment box (1) and is communicated with the inside of the condensation cavity. Valves are arranged on the drain pipe (20) and the cleaning pipe (22). The baffle (21) is obliquely installed on the left inner wall of the condensation cavity.

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