CN110686247B

CN110686247B - Novel equipment for hazardous waste treatment

Info

Publication number: CN110686247B
Application number: CN201911091100.9A
Authority: CN
Inventors: 杨宁
Original assignee: Nanping Renli Environmental Protection Technology Co Ltd
Current assignee: Luo Zhangming; Nanping Renli Environmental Protection Technology Co ltd
Priority date: 2019-11-09
Filing date: 2019-11-09
Publication date: 2020-11-20
Anticipated expiration: 2039-11-09
Also published as: CN110686247A; CN111853829A

Abstract

The invention discloses novel equipment for hazardous waste treatment, which comprises an incinerator, a waste liquid treatment device arranged on the incinerator and a waste gas treatment device matched with the incinerator, wherein the incinerator is provided with a waste liquid treatment device; the incinerator comprises a combustion chamber, an exhaust pipe communicated with the combustion chamber and a combustion-supporting device matched with the combustion chamber; the waste gas treatment device comprises a gas washing tower communicated with the exhaust pipe, an air outlet pipe arranged on the gas washing tower and a spraying structure arranged in the gas washing tower; according to the invention, through the arrangement of the gas washing tower and the spraying structure, the waste gas is cleaned in a double way, the smoke dust and harmful substances in the waste gas are effectively absorbed, and the effect of protecting the environment is achieved.

Description

Novel equipment for hazardous waste treatment

Technical Field

The invention belongs to the technical field of hazardous waste treatment, and particularly relates to novel equipment for hazardous waste treatment.

Background

The hazardous waste refers to waste with hazardous characteristics listed in a national hazardous waste list or identified according to the national hazardous waste identification standard and identification method; with the development of industry, the discharge of dangerous waste in industrial production process is increasing; hazards of hazardous waste include: destroy ecological environment, influence human health, restrict sustainable development and the like.

Although there are many methods for treating hazardous waste successfully, the common treatment methods are summarized as physical treatment, chemical treatment, biological treatment, thermal treatment and solidification treatment, but the existing treater is not perfect in treating solid hazardous waste, and the smoke generated after the hazardous waste is incinerated cannot be treated and is diffused into the air to cause pollution.

Disclosure of Invention

The invention provides a novel device for hazardous waste treatment, which can purify smoke dust and reduce pollution in order to overcome the defects of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: a novel device for dangerous waste treatment comprises an incinerator, a waste liquid treatment device arranged on the incinerator and a waste gas treatment device matched with the incinerator; the incinerator comprises a combustion chamber, an exhaust pipe communicated with the combustion chamber and a combustion-supporting device matched with the combustion chamber; the waste gas treatment device comprises a gas washing tower communicated with the exhaust pipe, an air outlet pipe arranged on the gas washing tower and a spraying structure arranged in the gas washing tower; through the arrangement of the gas washing tower and the spraying structure, the flue gas generated by burning the hazardous wastes is introduced into the cleaning liquid to be primarily cleaned, most harmful substances and smoke dust in the flue gas are absorbed, and then the harmful gases and smoke dust are secondarily absorbed through spraying, so that the harmful substances are prevented from being directly discharged into the atmosphere, and the environment protection effect is achieved; and combustion-supporting device's setting then makes dangerous waste can be by abundant burning, and when the treatment effect is better, the smoke and dust of production is less, reduces the load to exhaust treatment device, further reduces waste gas to atmospheric pollution.

The gas washing tower comprises a tower body, a dust filtering plate arranged in the tower body, a partition plate arranged in the tower body and dust filtering holes arranged on the dust filtering plate; through the arrangement of the structure, the cleaning liquid can be repeatedly used, the utilization rate of resources is improved, meanwhile, the smoke dust cannot block the spraying structure, and the service life of equipment is prolonged.

The spraying structure comprises a spraying driving part arranged in the tower body, a spraying guide pipe with one end communicated with the spraying driving part and a spraying head communicated with the other end of the spraying guide pipe; through the arrangement of the structure, the spraying of the waste gas is realized, so that the contact between the waste gas and the cleaning liquid is more sufficient, and a better waste gas treatment effect is achieved.

The waste liquid treatment device comprises a spray driving part, a spray guide pipe communicated with the spray driving part and an atomization part matched with the spray guide pipe; through the setting of above-mentioned structure for the waste liquid can be atomized into the droplet, thereby makes the waste liquid can be burnt more easily, and can not influence the useless burning of danger in the combustion chamber.

The atomization part comprises an atomization baffle plate which is arranged in an inclined state, an atomization convex part which is arranged on the atomization baffle plate and an evaporation plate which is matched with the atomization baffle plate; through the arrangement of the structure, the atomization of the waste liquid is realized, the structure is simple, and the matching is stable.

The combustion-supporting device comprises a stirring piece capable of moving back and forth, a stirring driving piece for driving the stirring piece to move back and forth, a transmission sleeve for driving and connecting the stirring piece and the stirring driving piece, and an air supply structure matched with the stirring piece; through the setting of above-mentioned structure for the inside part that is not fully burnt of useless heap of danger can be turned over out, thereby makes the useless burning that can be abundant of danger, avoids harmful substance to remain, and innoxious treatment effect is better.

The stirring piece comprises a stirring shaft which is in rotating fit with the combustion chamber, a stirring blade which is arranged on the stirring shaft in an inclined state, and a stirring inclined plane which is arranged on the stirring blade; through the setting of above-mentioned structure for the stirring leaf is useless the overturning of danger more easily, and the danger is useless between form the space, more abundant with the air contact, thereby make the danger useless can by more abundant burning, and the burning is more quick.

In conclusion, the double-cleaning device provided by the invention can be used for double cleaning of the waste gas through the arrangement of the gas washing tower and the spraying structure, effectively absorbing the smoke dust and harmful substances in the waste gas and playing a role in protecting the environment.

Drawings

Fig. 1 is a schematic perspective view of embodiment 2 of the present invention;

FIG. 2 is a schematic perspective sectional view of embodiment 2 of the present invention;

FIG. 3 is a schematic perspective view of embodiment 1 of the present invention;

FIG. 4 is a schematic perspective sectional view of embodiment 1 of the present invention;

FIG. 5 is an enlarged schematic view at A in FIG. 4;

fig. 6 is a schematic perspective sectional view of a combustion-supporting apparatus in embodiment 1 of the present invention;

FIG. 7 is an enlarged schematic view at B of FIG. 6;

FIG. 8 is a schematic perspective sectional view showing a waste liquid treatment apparatus according to example 1 of the present invention;

fig. 9 is an enlarged schematic view at C in fig. 8.

Detailed Description

Example 1:

as shown in fig. 3-9, a novel apparatus for hazardous waste treatment comprises an incinerator 1, a waste liquid treatment device and a combustion-supporting device; the incinerator comprises an exhaust pipe 11, a charging hopper 12, a combustion chamber 13, an ash chamber 14 and an ash falling hole 15; the incinerator is internally provided with a combustion chamber for carrying out incineration harmless treatment on hazardous wastes; the exhaust pipe is arranged at the top of the combustion chamber and is communicated with the interior of the combustion chamber, so that smoke generated by burning hazardous waste (namely hazardous waste) can be discharged conveniently for subsequent purification treatment; the filler hopper is arranged on the outer wall of the incinerator and communicated with the combustion chamber, so that hazardous waste is conveniently added, and the incineration treatment of the hazardous waste can be continuously carried out; the ash chamber is seted up in the combustion chamber below, and the ash hole that falls is seted up on the diapire of combustion chamber to make the interior useless ashes that produces of burning danger of combustion chamber can fall into the ash chamber through the ash hole that falls, reserve sufficient space for the combustion chamber, also make things convenient for simultaneously to carry out unified processing to ashes.

Specifically, the combustion-supporting device comprises a stirring piece 21, a stirring driving piece 22, a transmission sleeve 23 and an air supply structure; wherein the stirring piece 21 comprises a stirring shaft 211 and stirring blades 212; the stirring rod is connected with a bottom surface bearing of the combustion chamber and can rotate back and forth, one end of the stirring rod is positioned in the combustion chamber, and the other end of the stirring rod is positioned in the dust chamber; the stirring blades are welded at one end of the stirring shaft in the combustion chamber, the stirring blades are installed in an inclined state, and the included angle between the stirring blades and the bottom surface of the combustion chamber is 15 degrees in the embodiment, so that when the stirring blades rotate along with the stirring shaft, hazardous wastes in the combustion chamber can move onto the stirring blades along the stirring inclined surface 2121 arranged on the stirring blades and fall down again, and the effect of stirring and lifting the hazardous wastes is achieved, the hazardous wastes are more fully contacted with air and are more easily combusted, the combustion is more fully and faster; the stirring driving member is a motor purchased in the market, which is the prior art, and therefore, the details are not described herein; a transmission sleeve one end key-type connection is on the output of motor, and another end key-type connection is on the (mixing) shaft to when making the motor start, can drive stirring piece round trip to rotate, realize stirring useless to danger in the combustion chamber, make the useless burning of danger more abundant, the smoke and dust of production still less reduces the cost that follow-up smoke and dust was handled.

Specifically, the air supply structure comprises an air outlet 2122, an air inlet channel 2111, an air supply piece 24 and an air guide assembly, wherein the air guide assembly comprises an air guide ring sleeve 25, an air inlet 2112, a rotating part and an air guide tube 26; the stirring shaft is arranged in a hollow structure, so that an air inlet channel is formed in the stirring shaft, the air inlet hole is formed in the stirring shaft, the air guide ring sleeve is arranged on the stirring shaft and just covers the air inlet hole, and the air guide ring sleeve is communicated with the air inlet channel through the air inlet hole; the air outlet is formed in the back of the stirring blade and communicated with the air inlet channel, so that hazardous wastes cannot block the air outlet; one end of the air duct is communicated with the air duct sleeve, and the other end is communicated with an air supply piece, wherein the air supply piece is an air pump purchased in the market, which is the prior art and therefore is not described in detail herein; the air pump can pass through the air duct with the air in the outside and carry in the air guide ring cover, in the rethread inlet port flowed into inlet channel, flowed out in the venthole that is linked together with inlet channel again for the stirring leaf is turning the useless in-process that rises with the danger, and the air can be spouted on the danger of rising is useless, makes the contact between the useless and the air of danger more abundant, more helps the useless burning of danger, and the burning is more thorough.

Specifically, the rotating member includes a ring runner 2113, a ring flange 251, and a seal 252; part of the outer surface of the stirring shaft extends outwards to form a ring sleeve sliding groove 2113, part of the inner surface of the air guide ring sleeve extends inwards to form a ring sleeve convex edge, and the ring sleeve convex edge can be just embedded into the ring sleeve sliding groove, so that the air guide ring sleeve can be sleeved outside the stirring shaft and can rotate back and forth relative to the stirring shaft, the rotation fit between the air guide ring sleeve and the stirring shaft is realized, and the rotation of the stirring shaft can not be influenced while air can be stably transmitted; a sealing gasket is arranged between the ring sleeve sliding groove and the ring sleeve convex edge, so that the air guide ring sleeve and the stirring shaft form rotating sealing fit, stable gas transmission is ensured, and gas leakage is avoided.

Specifically, a grinding structure is arranged in the combustion chamber, and the grinding structure comprises a grinding plate 16, a grinding hole 17 and a grinding transmission component; the grinding plate is arranged in the combustion chamber, is attached to the bottom surface of the combustion chamber and is sleeved with the stirring shaft, and the rotation of the stirring shaft cannot directly drive the grinding plate to rotate; the grinding holes are formed in the grinding plate and correspond to the ash falling holes; the grinding transmission component comprises a first gear 18, a second gear 19 and a gear ring 10; a tooth socket 161 is arranged in the middle of the lower surface of the grinding plate, and a tooth ring is installed in the tooth socket and is connected with the side wall bolt of the tooth socket; the first gear key is connected on the stirring shaft and can rotate along with the rotation of the stirring shaft; the second gear is arranged on a gear shaft, the gear shaft is connected with a bottom surface bearing of the combustion chamber, and the second gear is simultaneously meshed with the first gear and the gear ring, so that when the first gear rotates along with the rotation of the stirring shaft, the second gear is driven to rotate, the gear ring is driven to rotate, the grinding plate is driven to rotate, and the rotation direction of the grinding plate is opposite to that of the stirring shaft, so that hazardous wastes can be turned up more easily under the opposite rotation matching of the grinding plate and the stirring blades; at the moment, the stirring blades are attached to the grinding plate, so that the ash on the grinding plate can be broken under the action of opposite rotation of the stirring blades and the grinding plate, and hazardous waste in the ash can be fully combusted.

Specifically, the milling hole 17 includes a milling section 171, a feeding section 172, a milling convex part 173, and a dust sweeping part 174; the feeding section is arranged on one side close to the upper surface of the grinding plate and is in a vertical cylinder shape; the milling section is communicated with the feeding section and is arranged in a flaring structure, so that when the milling plate rotates, blocky ashes can enter the milling section and can be milled under the action of the inclined side surface of the milling section and the bottom surface of the combustion chamber, the ash sweeping part is arranged on one side close to the lower surface of the milling plate, the side wall of the ash sweeping part is arranged in a vertical state, the milled ashes are more easily pushed, and the ashes can be swept into the ash falling hole; the lateral wall of the grinding section outwards extends and has formed the convex part of milling to make cubic ashes can be crushed more easily, not only fall into the ash hole more easily, also can make the danger useless by further abundant burning, do not avoid harmful substance to leak and cause environmental pollution.

Specifically, the waste liquid treatment device comprises a concentration tank 31, a filtering structure and a spraying structure; wherein the concentrating tank 31 comprises a tank body 311, a steam pipe 312 and a heat conducting rod 313; the box body is connected to the outer surface of the incinerator through bolts and is tightly attached to the outer surface of the incinerator, so that the box body can absorb heat dissipated from the incinerator to heat dangerous waste liquid in the box body, redundant moisture in the waste liquid is evaporated, the waste liquid is concentrated, subsequent incineration is facilitated, and the incineration efficiency is prevented from being influenced by excessive moisture; one end of the steam pipe is communicated with the top of the box body, and the other end of the steam pipe is communicated with the combustion chamber, so that steam evaporated from the box body can enter the combustion chamber along the steam pipe, harmful substances mixed in the steam can be burnt in the combustion chamber, and the harmful substances are purified along with smoke generated by the combustion chamber and then discharged into the atmosphere, thereby avoiding the leakage of the harmful substances and playing a role of protecting the environment; the heat conduction stick is made by metal material, and the welding is on the box lateral wall, and its one end is located the box, and the submergence is in the waste liquid, and the other end part at least stretches into in the combustion chamber to make the waste heat of producing of burning danger in the combustion chamber can be by the better conduction of heat conduction stick in the box, heat the waste liquid in the box, evaporate unnecessary moisture in the waste liquid and make the waste liquid concentrated, the heating effect is better, and concentration efficiency is higher.

Specifically, the filtering structure comprises a waste liquid barrel 32, a waste liquid guide pipe 33, a valve 331 and a filter screen 34; the waste liquid barrel is used for loading liquid separated from the dangerous waste, one end of the waste liquid guide pipe is communicated with the concentration box, and the other end of the waste liquid guide pipe is communicated with the waste liquid barrel, so that the waste liquid in the waste liquid barrel can flow into the concentration box through the waste liquid guide pipe, and redundant water in the waste liquid can be evaporated conveniently; the waste liquid guide pipe is provided with a valve which is convenient for controlling the opening and closing of the waste liquid guide pipe, so that the waste liquid in the waste liquid barrel can not flow into the concentration box when the waste liquid in the concentration box is concentrated, and the waste liquid in the waste liquid barrel can flow into the concentration box to be concentrated after the waste liquid in the concentration box is treated; a filter screen is arranged in the waste liquid barrel, so that impurities in the waste liquid can be filtered by the filter screen, the equipment is prevented from being blocked by the impurities, and the service life of the equipment is prolonged; wherein the waste liquid barrel 32 comprises a barrel body 321, a barrel cover 322 and a handle 323; the barrel cover is arranged on the barrel body, and the barrel cover and the barrel body are in threaded connection, so that a good sealing effect is achieved, harmful gas in waste liquid in the barrel body is prevented from volatilizing, and the health of workers is protected; the handle is connected to the barrel cover through bolts, so that the barrel cover can be used conveniently.

Specifically, the spray structure includes a spray driving member 35, a spray conduit 36, and an atomizing part 37; the spray driving member is a commercially available air pump, which is the prior art and therefore is not described herein; the water pump is installed in the concentration box, one end of the spray conduit is communicated with the air pump, the other end of the spray conduit penetrates into the combustion chamber, the spray conduit is covered with a negative pressure pipe 38, one end of the negative pressure pipe is positioned at the bottom of the concentration box, a through hole is formed in the negative pressure pipe, the other end of the negative pressure pipe is flush with the spray conduit, when the air pump is started, air flow can be sprayed into the combustion chamber from the spray conduit, more sufficient oxygen can be provided for the combustion chamber, negative pressure can be formed at the pipe orifice of the negative pressure pipe, and therefore waste liquid in the concentration box can be sucked into the negative pressure pipe from the through hole under the action of the negative; the atomizing part is installed promptly and is penetrated one end of combustion chamber at the spray pipe to make from negative pressure pipe spun waste liquid can just in time strike in the atomizing part, form the droplet under the effect of atomizing part, thereby more easily by the incineration, the harmful substance wherein of effectual processing has utilized the heat that burning waste produced, has improved energy utilization and has rateed, can not influence the burning of the interior solid waste of combustion chamber again simultaneously.

Specifically, the atomizing unit 37 includes an atomizing baffle 371, an atomizing protrusion 372, and an evaporating plate 373; the evaporation plate is welded on a connecting rod, and the connecting rod is connected with the negative pressure pipe through a bolt; the atomization baffle is arranged on the evaporation plate and is in an inclined state, the atomization convex part is arranged on the atomization baffle and is formed by extending the surface of the atomization baffle outwards, and the surface of the atomization convex part is arc-shaped, so that when waste liquid is sprayed out from the negative pressure pipe, the waste liquid is just sprayed on the atomization convex part and splashes into small liquid drops, and most of the waste liquid is scattered along the inclined atomization baffle in the direction obliquely upwards, so that the water mist can be incinerated before falling into flame, and the incineration of solid waste cannot be influenced; and a small part of liquid drops slide down along the atomization baffle, then the liquid drops drop on the evaporation plate, slide along the evaporation plate which is installed in an inclined state, and are evaporated in the sliding process, so that the liquid drops are prevented from directly falling into flame, and the temperature of the combustion chamber is ensured.

Example 2:

as shown in fig. 1-2, the present embodiment differs from embodiment 1 in that: in order to prevent the waste gas in the combustion chamber from being directly discharged into the atmosphere to cause air pollution, a waste gas treatment device is installed, and comprises a gas washing tower 41, a gas outlet pipe 42 and a spraying structure; wherein the scrubber 41 comprises a tower body 411, a dust filtering plate 412, a partition plate 413 and a dust filtering hole 414; lower part in the tower body is welded to the dirt board of straining, thereby with the inside partition of tower body spray room and washing room, 11 one end of blast pipe are linked together with the combustion chamber, the other end penetrates in the scrubbing tower, the mouth of pipe is located the washing room, be close to the bottom of washing room, thereby it is more abundant to make from the washing liquid contact in exhaust pipe exhaust waste gas and the washing room, contact time is longer, and then play better washing effect, make most smoke and dust in the waste gas and harmful substance ability absorbed by the washing liquid.

Specifically, the spraying structure comprises a spraying driving part 43, a spraying conduit 44 and a spraying head 45; the spraying driving part is a water pump purchased in the market, which is the prior art, and therefore, the detailed description is omitted; the spray driving part is arranged in the washing chamber, one end of the spray conduit is communicated with the spray driving part, the other end of the spray conduit penetrates through the dust filtering plate and enters the spray chamber, the pipe orifice is close to the top of the spray chamber, and the spray head is arranged on the end, so that the sprayed cleaning liquid has a wider range, is more fully contacted with waste gas, and has a better absorption effect; the gas outlet pipe 42 is arranged at the top of the gas washing tower, is communicated with the spray chamber and just corresponds to the spray header, so that waste gas can be discharged from the gas outlet pipe only through the spray header, and the waste gas can be better treated; the dust filtering holes are formed in the dust filtering plate, so that cleaning liquid in the spraying chamber can flow into the washing chamber again through the dust filtering holes after being contacted with waste gas, impurities in the cleaning liquid can be filtered, the utilization rate of the cleaning liquid is higher, meanwhile, the cleaning liquid is relatively clean, and the treatment effect on tail gas is better; the division board is installed in the washing room, separates into left room and right room with the washing, and the blast pipe is located the left room promptly, and it is indoor then to be located the right side to spray the driving piece to make the washing liquid of right room comparatively clean, guarantee to spray and have better treatment to waste gas.

Claims

1. A novel device for hazardous waste treatment comprises an incinerator (1), a waste liquid treatment device arranged on the incinerator (1) and a waste gas treatment device matched with the incinerator (1); the incinerator (1) comprises a combustion chamber (13), an exhaust pipe (11) communicated with the combustion chamber (13) and a combustion-supporting device matched with the combustion chamber (13); the method is characterized in that: the waste gas treatment device comprises a gas washing tower (41) communicated with the exhaust pipe (11), a gas outlet pipe (42) arranged on the gas washing tower (41) and a spraying structure arranged in the gas washing tower (41);

the scrubbing tower (41) comprises a tower body (411), a dust filtering plate (412) arranged in the tower body (411), a partition plate (413) arranged in the tower body (411) and dust filtering holes (414) arranged on the dust filtering plate (412);

the spraying structure comprises a spraying driving part (43) arranged in the tower body (411), a spraying guide pipe (44) with one end communicated with the spraying driving part (43) and a spraying head (45) communicated with the other end of the spraying guide pipe (44);

the waste liquid treatment device comprises a spraying driving piece (35), a spraying conduit (36) communicated with the spraying driving piece (35) and an atomizing part (37) matched with the spraying conduit (36);

the atomizing part (37) comprises an atomizing baffle (371) which is arranged in an inclined state, an atomizing convex part (372) which is arranged on the atomizing baffle (371), and an evaporating plate (373) which is matched with the atomizing baffle (371);

the combustion-supporting device comprises a stirring piece (21) capable of moving back and forth, a stirring driving piece (22) for driving the stirring piece (21) to move back and forth, a transmission sleeve (23) for transmitting and connecting the stirring piece (21) and the stirring driving piece (22), and an air supply structure matched with the stirring piece (21);

the stirring piece (21) comprises a stirring shaft (211) which is rotationally matched with the combustion chamber (13), a stirring blade (212) which is arranged on the stirring shaft (211) in an inclined state, and a stirring inclined plane (2121) which is arranged on the stirring blade (212);

the air supply structure comprises an air outlet hole (2122), an air inlet channel (2111), an air supply piece (24) and an air guide component, wherein the air guide component comprises an air guide ring sleeve (25), an air inlet hole (2112), a rotating part and an air guide pipe (26); the stirring shaft is arranged in a hollow structure, so that an air inlet channel is formed in the stirring shaft, the air inlet hole is formed in the stirring shaft, the air guide ring sleeve is arranged on the stirring shaft and just covers the air inlet hole, and the air guide ring sleeve is communicated with the air inlet channel through the air inlet hole; the air outlet is formed in the back of the stirring blade and communicated with the air inlet channel, so that hazardous wastes cannot block the air outlet;

the rotating part comprises a ring sleeve sliding groove (2113), a ring sleeve convex edge (251) and a sealing gasket (252); part of the outer surface of the stirring shaft extends outwards to form a ring sleeve sliding groove (2113), part of the inner surface of the air guide ring sleeve extends inwards to form a ring sleeve convex edge, and the ring sleeve convex edge can be just embedded into the ring sleeve sliding groove;

the milling structure comprises a milling plate (16), a milling hole (17) and a milling transmission component; the grinding plate is arranged in the combustion chamber, is attached to the bottom surface of the combustion chamber and is sleeved with the stirring shaft, and the rotation of the stirring shaft cannot directly drive the grinding plate to rotate; the grinding holes are formed in the grinding plate and correspond to the ash falling holes; the grinding transmission component comprises a first gear (18), a second gear (19) and a gear ring (10); a tooth socket (161) is arranged in the middle of the lower surface of the grinding plate, and a tooth ring is installed in the tooth socket and is in bolted connection with the side wall of the tooth socket;

the milling hole (17) comprises a milling section (171), a feeding section (172), a milling convex part (173) and an ash sweeping part (174); the feeding section is arranged on one side close to the upper surface of the grinding plate and is in a vertical cylinder shape; the grinding section is communicated with the feeding section and is arranged in a flaring structure;

the waste liquid treatment device comprises a concentration box (31), a filtering structure and a spraying structure; wherein the concentration box (31) comprises a box body (311), a steam pipe (312) and a heat conducting rod (313);

the filtering structure comprises a waste liquid barrel (32), a waste liquid guide pipe (33), a valve (331) and a filter screen (34); the waste liquid barrel is used for loading liquid separated from dangerous waste, one end of a waste liquid guide pipe is communicated with the concentration box, the other end of the waste liquid guide pipe is communicated with the waste liquid barrel, a valve is arranged on the waste liquid guide pipe, the opening and closing of the waste liquid guide pipe are convenient to control, and the waste liquid barrel (32) comprises a barrel body (321), a barrel cover (322) and a handle (323); the barrel cover is arranged on the barrel body, and the barrel cover and the barrel body are in threaded connection, so that a good sealing effect is achieved, harmful gas in waste liquid in the barrel body is prevented from volatilizing, and the health of workers is protected; the handle is connected to the barrel cover through bolts, so that the barrel cover can be used conveniently.