CN211487183U - Laboratory exhaust emission system - Google Patents

Abstract

The utility model relates to a laboratory waste gas discharge system, which comprises a waste gas collecting system, a waste gas treatment system and a waste gas discharge system, wherein the waste gas collecting system comprises a fume hood, a gas collecting pipe, a first exhaust fan and a reducing pipe, the waste gas treatment system comprises a photocatalytic oxidation module, a ventilation pipe and a dust treatment module, the dust treatment module comprises an electrostatic dust collector, an air inlet pipe, a dust filter, an air outlet pipe and an active carbon adsorption module, the waste gas discharge system comprises an exhaust pipe, a second exhaust fan and an air outlet, the utility model is that a plurality of dust removal devices are arranged in the dust treatment module in the laboratory waste gas discharge system, dust in the waste gas can be fully treated, so that the waste gas discharged into the air can not pollute the environment, a drain outlet is arranged in the dust processor, and the adsorbed dust can be conveniently discharged, thereby ensuring that the dust processor has good working effect, and the dust processor has long service life and is not easy to lose efficacy.

Description

Laboratory exhaust emission system

Technical Field

The utility model relates to a laboratory exhaust emission system field, in particular to laboratory exhaust emission system who comprises exhaust gas collection system, exhaust treatment system and exhaust emission system.

Background

Along with the development of science and technology in China, experiments on scientific research become more frequent, and the pollution of the experimental waste gas generated from the experiments becomes more and more serious, so that equipment capable of treating the waste gas generated in the experiments is urgently needed, and a laboratory waste gas discharge system is generated, is used for treating the waste gas generated in the experiments in a laboratory and discharging the treated waste gas out of the laboratory, and can ensure that the waste gas discharged out of the laboratory does not pollute the environment.

In prior art, utility model patent that publication number is CN206715690U specifically discloses a laboratory exhaust emission system, including exhaust gas collection system, exhaust gas treatment system and exhaust emission system, exhaust gas collection system, exhaust gas treatment system and exhaust emission system connect gradually, and exhaust gas collection system includes fume chamber, gas collecting channel and reducing pipe, and exhaust gas treatment system includes photocatalytic oxidation module and honeycomb active carbon adsorption module, and exhaust emission system includes gas outlet, blast pipe and exhaust fan.

The laboratory discharge system during operation, the waste gas that the waste gas collection system produced with the experiment is collected, waste gas gets into the exhaust treatment system under exhaust fan's effect in, be provided with photocatalytic oxidation module and honeycomb active carbon adsorption module among the exhaust treatment system, the photocatalytic oxidation module can change the harmful gas in the waste gas into harmless gas, honeycomb active carbon adsorption module can adsorb the dust granule that mingles in the experimental waste gas, photocatalytic oxidation module and honeycomb active carbon adsorption module are handled waste gas jointly, with waste gas innoxious, the exhaust gas discharge system will be handled again, harmless waste gas discharge laboratory.

The above prior art solutions have the following drawbacks: the honeycomb activated carbon module in the waste gas treatment system is singly arranged, dust particles in waste gas cannot be fully adsorbed, the honeycomb activated carbon easily loses efficacy due to excessive adsorption of dust, and if the invalid honeycomb activated carbon cannot be replaced in time, the dust particles in the waste gas are directly discharged into the air without being treated or incompletely treated, so that the environment is polluted.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a laboratory exhaust emission system has the dust particle that can be fully mix with in the waste gas and filters, and the difficult advantage that became invalid of filter equipment.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a laboratory waste gas discharge system comprises a waste gas collecting system, a waste gas treatment system and a waste gas discharge system, wherein the waste gas collecting system comprises a ventilation cabinet arranged in a laboratory, the waste gas treatment system comprises a photocatalytic oxidation module communicated with the ventilation cabinet, a dust treatment module is further arranged in the waste gas treatment system, the dust treatment module is communicated with the photocatalytic oxidation module through a ventilation pipe, and the dust treatment module comprises an electrostatic dust collector, a dust filter and an activated carbon adsorption module;

the electrostatic precipitator is provided with the shell, one side of shell with the ventilation pipe is linked together, the shell opposite side pass through the air-supply line with the dust filter is linked together, the dust filter includes the casing and sets up the filtrate in the casing, casing one side lower extreme be provided with the air intake that the air-supply line is linked together, casing opposite side upper end is provided with the air outlet, the one end of active carbon adsorption module 27 through go out the tuber pipe with the air outlet is linked together.

Through adopting above-mentioned technical scheme, the waste gas that waste gas collection system produced the experiment is collected and is carried exhaust treatment device, photocatalytic oxidation module among the exhaust treatment device can handle the harmful gas in the waste gas, change harmful gas into harmless gas, dust treatment module can handle the dust granule that mingles with in the waste gas, waste gas lets in electrostatic precipitator in proper order, dust filter and active carbon adsorption module, make the dust granule in the waste gas fully handled, and then make waste gas completely harmless, the waste gas discharge laboratory that the rethread waste gas discharge system will be handled, can in time discharge the laboratory with the waste gas that the experiment produced effectively, avoid waste gas to cause the injury to the experimenter, can handle harmful substance in the waste gas again, cause destruction to the environment after avoiding waste gas discharge laboratory.

The utility model discloses further set up to: the air inlet is internally provided with an air diffusion mesh enclosure, the side surface of the air diffusion mesh enclosure is fixedly connected with the inner wall of the air inlet, and the air diffusion mesh enclosure is provided with air diffusion meshes.

Through adopting above-mentioned technical scheme, waste gas can be broken up by the gas mesh when passing through the gas screen panel that looses to make waste gas and filtrate mix more evenly, strengthen the adsorption effect of filtrate to the dust.

The utility model discloses further set up to: a stirring device is arranged in the shell and comprises a motor, a stirring paddle and a supporting plate, the motor is fixedly connected with the upper end of the shell, a shaft hole is formed in the center of the upper end face of the shell, the output end of the motor is fixedly connected with a rotating shaft, the rotating shaft extends into the shell through the shaft hole, and one end of the rotating shaft is fixedly connected with a driving gear;

the driving gear is engaged with a driven gear, a transmission shaft is fixedly connected to the center of the driven gear, the transmission shaft is vertically arranged, a stirring paddle is fixedly connected to the lower end of the transmission shaft, the transmission shaft penetrates through the supporting plate, the transmission shaft is rotatably connected with the supporting plate, two sides of the supporting plate are fixedly connected with the inner wall of the shell, and the end face of the supporting plate is parallel to the upper end face of the shell.

Through adopting above-mentioned technical scheme, the motor sets up at the casing up end, avoid the filtrate to splash on the motor and then cause the damage to the motor at the stirring in-process, the motor passes through the transmission shaft of gear drive connection on the bearing plate, the bearing plate plays the effect of bearing transmission shaft and epaxial part, the transmission shaft drives fixed connection's stirring rake with it, the stirring rake stirs the filtrate when waste gas lets in the filtrate, make filtrate and waste gas intensive mixing, the adsorption effect of dust in the reinforcing filtrate to waste gas.

The utility model discloses further set up to: the casing upper end is provided with annotates the liquid mouth, it is furnished with notes flap to annotate the liquid mouth, it is provided with the relief valve to annotate flap upper end.

Through adopting above-mentioned technical scheme, annotate the filtrate in to the casing through annotating the liquid mouth, the experimenter of being convenient for operates, annotates the atmospheric pressure that the relief valve on the liquid flap can balance the casing inside, prevents that exhaust emission system during operation from taking the filtrate out in the dust filter casing.

The utility model discloses further set up to: the lower terminal surface of casing is the back taper, the back taper point is provided with the drain, be furnished with the blowdown flap on the drain.

Through adopting above-mentioned technical scheme, terminal surface is the back taper face for the sedimentary dust in the filtrate of being convenient for slides to the drain under the casing, sets up the drain and is convenient for discharge the casing with sedimentary dust.

The utility model discloses further set up to: the electrostatic dust collector comprises a shell and electrode plates, the electrode plates comprise positive electrode plates and negative electrode plates, the positive electrode plates and the negative electrode plates are fixedly connected with two opposite sides of the inner wall of the shell respectively, and the positive electrode plates and the negative electrode plates are arranged in parallel with the air flow running direction.

Through adopting above-mentioned technical scheme, electrostatic precipitator is at the during operation, and the electrode plate circular telegram can produce the electromagnetic field between positive electrode plate and the negative electrode plate, and when waste gas passed through between positive electrode plate and the negative electrode plate, the dust of the static that is mingled with in the waste gas can adhere on the electrode plate under the effect of electromagnetic field to reach the effect of dust removal.

The utility model discloses further set up to: the lower extreme of shell is the back taper setting, the terminal surface is provided with the dust exhaust mouth under the shell, be furnished with the dust exhaust flap on the dust exhaust mouth.

Through adopting above-mentioned technical scheme, when electrostatic precipitator is inside to have the dust to accumulate, open the dust exhaust flap, the dust of accumulation can be through conical surface landing to dust exhaust mouth department to through the dust exhaust mouth electrostatic precipitator of discharging, the experimenter of being convenient for in time clears up the dust of the inside accumulation of electrostatic precipitator.

The utility model discloses further set up to: the active carbon adsorption module comprises a box body and a honeycomb active carbon plate vertically arranged in the box body, one end of the box body is communicated with the air outlet pipe, and the other end of the box body is communicated with the waste gas discharge system.

Through adopting above-mentioned technical scheme, when waste gas passes through the active carbon adsorption module, the honeycomb active carbon board in the active carbon adsorption module can adsorb the dust of clamp impurity in waste gas, guarantees that the dust in the waste gas is fully handled, and exhaust emission system and then will handle the exhaust-gas discharge laboratory of accomplishing.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the dust treatment module is internally provided with an electrostatic dust collector, a dust filter and an activated carbon adsorption module, so that dust in waste gas can be fully treated, and the waste gas discharged into the air is ensured not to pollute the environment;

2. outlets for discharging dust are arranged in the electrostatic dust collector and the dust filter, so that the dust adsorbed by the electrostatic dust collector and the dust filter can be cleaned in time conveniently, and the dust treatment module can be ensured to have good working effect;

3. the electrostatic precipitator only needs to be electrified to carry out dust removal work, the dust filter only needs to replace filter liquor to carry out dust removal work, the filter liquor can be used for a long time, the activated carbon adsorption module only needs to adsorb trace dust, and the activated carbon adsorption module can not lose efficacy due to rapid adsorption of a large amount of dust, so that the whole dust treatment module has the advantages of long service life and low probability of losing efficacy.

Drawings

FIG. 1 is a schematic view of a structure for embodying a laboratory exhaust gas discharge system;

FIG. 2 is a schematic view for embodying the internal structure of a laboratory exhaust gas discharge system;

FIG. 3 is a schematic view showing an internal structure of an electrostatic precipitator;

FIG. 4 is a schematic view showing an internal structure of a dust filter;

FIG. 5 is a schematic diagram for showing the internal structure of an activated carbon adsorption module;

FIG. 6 is a schematic view for embodying the structure of an exhaust gas discharge system.

Reference numerals: 1. an exhaust gas collection system; 11. a fume hood; 12. a gas-collecting hood; 13. a gas collecting pipe; 14. a reducing pipe; 15. a first exhaust fan; 2. an exhaust gas treatment system; 21. a photocatalytic oxidation module; 22. a vent pipe; 23. an electrostatic precipitator; 231. an electrode plate; 232. a housing; 233. a dust exhaust port; 234. a dust exhaust opening cover; 24. an air inlet pipe; 25. a dust filter; 251. a housing; 2511. an air inlet; 2512. an air outlet; 2513. a liquid injection port; 2514. a liquid inlet cover; 2515. a pressure relief valve; 2516. a sewage draining outlet; 2517. a sewage draining port cover; 252. a stirring device; 2521. an electric motor; 2522. a rotating shaft; 2523. a driving gear; 2524. a driven gear; 2525. a drive shaft; 2526. a stirring paddle; 2527. a support plate; 253. filtering the solution; 254. an air-dispersing net cover; 26. an air outlet pipe; 27. an activated carbon adsorption module; 271. a box body; 272. a honeycomb activated carbon plate; 3. an exhaust gas discharge system; 31. an exhaust duct; 32. an air outlet; 33. a second exhaust fan.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses a laboratory exhaust emission system, including exhaust gas collection system 1, exhaust gas treatment system 2 and exhaust emission system 3, exhaust gas collection system 1 is including setting up fume chamber 11 in the laboratory, exhaust gas collection system 1, exhaust gas treatment system 2 and exhaust emission system 3 communicate in proper order, exhaust gas collection system 1 and exhaust gas treatment system 2 are placed in the laboratory, exhaust emission system 3 is placed outside the laboratory, exhaust gas collection system 1 can collect the harmful waste gas that the experiment produced, exhaust gas treatment system 2 can carry out innocent treatment with the waste gas that exhaust gas collection system 1 collected, exhaust emission system 3 can handle the exhaust-gas discharge laboratory of accomplishing with exhaust gas treatment system 2, and the waste gas of discharge laboratory can not lead to the fact the destruction to the environment.

Referring to fig. 2, the exhaust gas collecting system 1 includes a fume hood 11, a gas collecting hood 12, a gas collecting pipe 13, a first exhaust fan 15 and a reducing pipe 14, the fume hood 11 is arranged on the ground of a laboratory, the top of the fume hood 11 is provided with a through hole, the gas collecting hood 12 is in a horn mouth shape with a large lower end and a small upper end, the air suction effect of the first exhaust fan 15 can be enhanced, the gas collecting hood 12 is communicated with the through hole at the top of the fume hood 11, the large end of the gas collecting hood 12 is connected with the top of the fume hood 11 in a sealing manner, one end of the gas collecting pipe 13 is connected with the small end of the gas collecting hood 12 in a sealing manner, the other end of the gas collecting pipe 13 is connected with the small end of the reducing pipe 14 in a sealing.

The waste gas treatment system 2 comprises a photocatalytic oxidation module 21, a ventilation pipe 22, an electrostatic dust collector 23, an air inlet pipe 24, a dust filter 25, an air outlet pipe 26 and an active carbon adsorption module 27, the photocatalytic oxidation module 21 can convert harmful gas in waste gas into harmless gas, so that the waste gas is purified, the lower end of the photocatalytic oxidation module 21 is communicated with a reducing pipe 14 and is hermetically connected with the large end of the reducing pipe 14, the side surface of the photocatalytic oxidation module 21 is hermetically connected with one end of the ventilation pipe 22, and the other end of the ventilation pipe 22 is hermetically connected with the electrostatic dust collector 23 and is communicated with the inside of the electrostatic dust collector 23.

Referring to fig. 3, the electrostatic precipitator 23 includes a housing 232 and electrode plates 231, the electrode plates 231 include positive electrode plates and negative electrode plates, the positive electrode plates and the negative electrode plates are fixedly connected to two opposite sides of the inner wall of the housing 232, the 231 direction of the electrode plates is communicated with the air flow direction, the positive electrode plates and the negative electrode plates are connected to the circuit of the laboratory exhaust emission system and realize the electrification or the outage of the electrode plates along with the switch of the whole circuit of the system, when the system is in a working state, an electromagnetic field can be generated between the positive electrode plates and the negative electrode plates, and when the exhaust passes through the electrostatic precipitator 23, the electrode plates 231 can adsorb most of the dust with static electricity in the exhaust.

The lower end surface of the outer shell 232 is a conical surface and is provided with a dust exhaust opening 233, the dust exhaust opening 233 is provided with a dust exhaust opening cover 234, dust can be exhausted out of the electrostatic dust collector 23 through the dust exhaust opening 233 when a certain amount of dust is accumulated, one side of the outer shell 232 facing away from the ventilation pipe 22 is hermetically connected with one end of the air inlet pipe 24 and communicated with the air inlet pipe 24, and one end of the air inlet pipe 24 facing away from the electrostatic dust collector 23 is hermetically connected with the dust filter 25.

Referring to fig. 4, the dust filter 25 includes a housing 251, a stirring device 252 and a filtering liquid 253, an air inlet 2511 is disposed at a lower end of one side of the housing 251, an air outlet 2512 is disposed at an upper end of the other side of the housing 251, the air inlet 2511 and the air outlet 2512 are respectively connected with the air inlet pipe 24 and the air outlet pipe 26 in a sealing manner, exhaust gas is introduced into the filtering liquid 253 through the air inlet 2511, an air dispersing mesh enclosure 254 is disposed on the air inlet 2511, an outer side of the air dispersing mesh enclosure 254 is connected with an inner wall of the air inlet 2511 through threads, so that the air dispersing mesh 254 can be detached or replaced conveniently, the exhaust gas introduced into the filtering liquid can be dispersed by the air dispersing mesh of the air dispersing mesh enclosure 254, the filtering.

The air diffuser mesh cover 254 may be made of stainless steel or other materials having good rust-proof properties, and the filtering liquid 253 may be oil, water or other liquid having an effect of adsorbing dust.

The stirring device 252 includes a motor 2521, stirring paddles 2526 and a support plate 2527, the motor 2521 is connected to the upper end of the housing 251 through a bolt, and a rubber pad is disposed at the connection position to reduce the vibration transmitted to the housing 251 when the motor 2521 operates, a shaft hole is disposed at the center of the upper end surface of the housing 251, a rotating shaft 2522 fixedly connected to the motor 2521 extends into the housing 251 through the shaft hole, a deep groove ball bearing is disposed between the rotating shaft 2522 and the shaft hole to avoid friction between the rotating shaft 2522 and the shaft hole when rotating, the axial direction of the rotating shaft 2522 is perpendicular to the upper end surface of the housing 251, and a driving gear 2523 is fixedly connected to one end of the rotating shaft 2522.

Two sides of the supporting plate 2527 are fixedly connected with the inner wall of the housing 251, the upper end surface of the supporting plate 2527 is flush with the lower side of the air outlet 2512, the plane of the supporting plate 2527 is parallel to the upper end surface of the housing 251, a transmission shaft 2525 is vertically arranged on the supporting plate 2527, a deep groove ball bearing is arranged between the transmission shaft 2525 and the supporting plate to support the transmission shaft 2525 to rotate, the transmission shaft 2525 is in interference fit with an inner ring of the bearing to ensure the axial fixation of the transmission shaft 2525, one end of the transmission shaft 2525 on the upper side of the supporting plate 2527 is fixedly connected with a driven gear 2524, the driven gear 2524 is meshed with a driving gear 2523, and a stirring paddle 2526 is fixedly connected with one end.

The motor 2521 drives the stirring paddle 2526 by driving the transmission shaft 2525, and the stirring paddle 2526 stirs the filtrate 253 when the exhaust gas is introduced into the filtrate 253, so that the exhaust gas introduced into the filtrate 253 can be fully mixed with the filtrate 253, and the filtrate 253 can filter dust more fully, the number of the transmission shafts 2525 can be two or more, and the situation that the single stirring paddle 2526 stirs the filtrate 253 to cause the liquid level of the filtrate 253 to generate vortexes is avoided.

The upper end surface of the shell 251 is provided with a liquid injection port 2513, the liquid injection port 2513 is provided with a liquid injection port cover 2514, a pressure release valve 2515 is arranged on the liquid injection port cover 2514 to balance the air pressure inside and outside the shell 251, the filtered liquid 253 can be injected into the shell 251 through the liquid injection port 2513, and the liquid level of the filtered liquid 253 injected into the shell 251 is close to the lower end surface of the supporting plate 2527 so as to ensure that the filtered liquid 253 in the shell 251 can be fully filtered against dust.

The terminal surface is the back taper under casing 251, is provided with drain 2516 at the lower terminal surface of casing 251, is furnished with blowdown flap 2517 on drain 2516, when having the dust accumulation in casing 251, opens blowdown flap 2517, and the dust can be followed drain 2516 and discharged, is convenient for keep the inside cleanness of casing 251.

Referring to fig. 5, the activated carbon adsorption module 27 includes a box body 271 and a honeycomb activated carbon plate 272 vertically placed in the box body 271, a vertical groove having a width corresponding to the thickness of the honeycomb activated carbon plate 272 is formed in the inner side wall of the box body 271, the edge of the honeycomb activated carbon plate 272 is connected with the groove, one side of the box body 271 is hermetically connected with the air outlet pipe 26 and communicated with the air outlet pipe 26, the other side of the box body 271 is hermetically connected with the exhaust emission system 3 and communicated with the exhaust emission system 3, and the upper end surface of the box body 271 is hermetically connected with the box body 271 through a hinge.

The honeycomb activated carbon has very strong adsorption to the dust, and a plurality of honeycomb activated carbon boards 272 in the box 271 are the overlapping and place, can adsorb micro-dust in the waste gas effectively, handle the back through activated carbon adsorption module 27, and the dust in the waste gas has been handled fully, and the waste gas of having handled can not cause the pollution to the environment, and after honeycomb activated carbon board 272 became invalid, can open the box 271 up end to change honeycomb activated carbon board 272.

The exhaust gas treatment system 2 can be integrally hung on the ceiling of a laboratory.

Referring to fig. 6, exhaust emission system 3 includes exhaust pipe 31, second exhaust fan 33 and air exit 32, box 271 sealing connection of active carbon adsorption module 27 in exhaust treatment system 2 of exhaust pipe 31 one end, the other end and air exit 32 sealing connection, air exit 32 stretches out laboratory wall and crooked 90 towards ground, avoid debris to fall into in the exhaust pipe 31, second exhaust fan 33 establishes through bolt and air exit 32 inner wall fixed connection, second exhaust fan 33 can pass through exhaust pipe 31 and air exit 32 exhaust laboratory with the waste gas of handling among the exhaust treatment system 2 and accomplishing.

The sealing connection is a flange plate connection, a sealing ring is arranged at the joint for sealing, and the flange plate can be made of engineering plastics, aluminum alloy and other materials with certain corrosion resistance and lighter weight, so that the overall mass of the real waste gas treatment system is reduced, and the whole hoisting of the waste gas treatment system is facilitated.

The implementation principle of the embodiment is as follows: when the laboratory staff does the experiment in fume chamber 11, open laboratory exhaust emission system's circuit switch, make each module among the laboratory exhaust emission system get into operating condition, first exhaust fan 15 can pass through fume chamber 11, gas collecting channel 12 and collecting pipe 13 with the waste gas and the dust that the experiment produced and inhale exhaust treatment system 2, and photocatalytic oxidation module 21 among the exhaust treatment system 2 can turn into harmless gas with the harmful gas in the waste gas.

After the exhaust gas is treated by the photocatalytic oxidation module 21, the exhaust gas enters the electrostatic precipitator 23 through the ventilation pipe 22, dust mixed in the exhaust gas is adsorbed by the electrode plate 231 in the electrostatic precipitator 23, then the exhaust gas is introduced into the filtering liquid 253 through the air inlet pipe 24 and the air inlet 2511, the exhaust gas introduced into the filtering liquid 253 is dispersed by the air dispersing mesh cover 254 arranged on the air inlet 2511, the exhaust gas is made to contact with the filtering liquid 253, the filtering liquid 253 is stirred by the stirring device 252 arranged in the dust filter 25, the filtering liquid 253 can be fully contacted with the exhaust gas, and the adsorption effect of the filtering liquid 253 on the dust is enhanced.

The dust content in the waste gas that has been handled through electrostatic precipitator 23 and dust filter 25 has greatly reduced, and the waste gas that has been handled by dust filter 25 passes through air outlet 2512 and gets into in the tuber pipe 26, and the active carbon adsorption module 27 that is connected with tuber pipe 26 can be to further absorption to the minute quantity dust in the waste gas for dust is by fully handling in the waste gas, and the second exhaust fan 33 in the exhaust emission system 3 will handle the waste gas of accomplishing again and pass through exhaust pipe 31 and air exit 32 and discharge the laboratory.

After the photocatalytic oxidation module 21, the electrostatic precipitator 23, the dust filter 25 and the activated carbon adsorption module 27 are jointly treated, the exhaust gas entering the exhaust gas discharge system 3 is completely harmless, so that the environment is not polluted.

When a sufficient amount of dust accumulates in the electrostatic precipitator 23, the dust discharge port cover 234 is opened, and the dust between the electrode plates 231 is discharged out of the electrostatic precipitator 23 through the dust discharge port 233.

When dust deposits at the bottom end of the dust filter 25, the sewage draining port cover 2517 is opened, dust and filter liquor 253 can be discharged out of the dust filter 25 through the sewage draining port 2516, the filter liquor 253 can flush the dust adhered to the bottom of the shell 251 to ensure that the dust accumulated at the bottom of the shell 251 can be completely discharged, the sewage draining port cover 2517 is covered, the liquid filling port cover 2514 is opened, the filter liquor 253 is injected into the shell through the liquid filling port 2513, the liquid level of the filter liquor 253 is close to the lower end face of the supporting plate 2527, and the liquid filling port cover 2514 is covered, so that the dust filter can be continuously used.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. A laboratory exhaust emission system, including exhaust gas collection system (1), exhaust gas treatment system (2) and exhaust emission system (3), exhaust gas collection system (1) is including setting up fume hood (11) in the laboratory, exhaust gas treatment system (2) include with photocatalytic oxidation module (21) of fume hood (11) intercommunication, its characterized in that: the waste gas treatment system (2) is also provided with a dust treatment module, the dust treatment module is communicated with the photocatalytic oxidation module (21) through a ventilation pipe (22), and the dust treatment module comprises an electrostatic dust collector (23), a dust filter (25) and an activated carbon adsorption module (27);

the electrostatic dust collector (23) is provided with a shell (232), one side of the shell (232) is communicated with the ventilating pipe (22), the other side of the shell (232) is communicated with the dust filter (25) through an air inlet pipe (24), the dust filter (25) comprises a shell (251) and filter liquid (253) arranged in the shell (251), the lower end of one side of the shell (251) is provided with an air inlet (2511) communicated with the air inlet pipe (24), the liquid level of the filter liquid (253) is higher than that of the air inlet (2511), the upper end of the other side of the shell (251) is provided with an air outlet (2512), and one end of the active carbon adsorption module (27) is communicated with the air outlet (2512) through an air outlet pipe (26).

2. A laboratory exhaust emission system according to claim 1 wherein: an air dispersing net cover (254) is arranged in the air inlet (2511), the side face of the air dispersing net cover (254) is fixedly connected with the inner wall of the air inlet (2511), and air dispersing meshes are formed in the air dispersing net cover (254).

3. A laboratory exhaust emission system according to claim 1 wherein: a stirring device (252) is arranged inside the housing (251), the stirring device (252) comprises a motor (2521), a stirring paddle (2526) and a supporting plate (2527), the motor (2521) is fixedly connected with the upper end of the housing (251), a shaft hole is formed in the center of the upper end face of the housing (251), a rotating shaft (2522) is fixedly connected to the output end of the motor (2521), the rotating shaft (2522) extends into the housing (251) through the shaft hole, and a driving gear (2523) is fixedly connected to one end of the rotating shaft (2522);

the driving gear (2523) is engaged with a driven gear (2524), a transmission shaft (2525) is fixedly connected to the central position of the driven gear (2524), the transmission shaft (2525) is vertically arranged, a stirring paddle (2526) is fixedly connected to the lower end of the transmission shaft (2525), the transmission shaft (2525) penetrates through the support plate (2527), the transmission shaft (2525) is rotatably connected with the support plate (2527), two sides of the support plate (2527) are fixedly connected with the inner wall of the housing (251), and the end surface of the support plate (2527) is parallel to the upper end surface of the housing (251).

4. A laboratory exhaust emission system according to claim 1 wherein: the liquid injection device is characterized in that a liquid injection port (2513) is formed in the upper end of the shell (251), a liquid injection port cover (2514) is matched with the liquid injection port (2513), and a pressure release valve (2515) is arranged at the upper end of the liquid injection port cover (2514).

5. A laboratory exhaust emission system according to claim 1 wherein: the lower terminal surface of casing (251) is the back taper face, the lower extreme of casing (251) is provided with drain (2516), drain (2516) are furnished with blowdown flap (2517).

6. A laboratory exhaust emission system according to claim 1 wherein: the electrostatic dust collector (23) comprises a shell (232) and an electrode plate (231), the electrode plate (231) comprises a positive electrode plate and a negative electrode plate, the positive electrode plate and the negative electrode plate are fixedly connected with two opposite sides of the inner wall of the shell (232) respectively, and the positive electrode plate and the negative electrode plate are arranged in parallel with the air flow running direction.

7. The laboratory exhaust emission system according to claim 6, wherein: the lower extreme of shell (232) is the back taper setting, the terminal surface is provided with dust exhaust mouth (233) under shell (232), dust exhaust mouth (233) are furnished with dust exhaust flap (234).

8. A laboratory exhaust emission system according to claim 1 wherein: the active carbon adsorption module (27) comprises a box body (271) and a honeycomb active carbon plate (272) vertically arranged in the box body (271), one end of the box body (271) is communicated with the air outlet pipe (26), and the other end of the box body (271) is communicated with the waste gas discharge system (3).

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