CN208042160U - It is a kind of to utilize the useless bucket of pyrolysis gasification furnace processing transhipment and recycling system - Google Patents
It is a kind of to utilize the useless bucket of pyrolysis gasification furnace processing transhipment and recycling system Download PDFInfo
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- CN208042160U CN208042160U CN201820233139.4U CN201820233139U CN208042160U CN 208042160 U CN208042160 U CN 208042160U CN 201820233139 U CN201820233139 U CN 201820233139U CN 208042160 U CN208042160 U CN 208042160U
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Abstract
The useless bucket of pyrolysis gasification furnace processing transhipment and recycling system are utilized the utility model discloses a kind of, it is sent into pyrolysis gasification furnace (i.e. AB stoves) after scrap iron bucket is broken into iron plate, solvent slop and paint for remaining on metal bucket etc. are gasified, mixed flue gas is sent into former incineration system dual firing chamber and further burns, and tail gas is sent into smoke stack emission after being handled by original flue gas purification system.The heat of gasification elegance of the AB stoves hot-air for exchanging heat out from former incineration system air preheater, iron plate is after heat treatment directly from the drag conveyor discharge of gasification furnace bottom, metal recoverable.The technique can thoroughly solve the problems, such as that the useless bucket of dangerous waste industry transhipment clean cannot be handled on the basis of combining former incineration system, by increasing a set of pyrolysis gasifying device newly, while have preferable environmental benefit and economic benefit.
Description
Technical field
The utility model is related to gasification furnace incineration technologies more particularly to a kind of transported using pyrolysis gasification furnace processing to give up bucket simultaneously
Recycling system.
Background technology
The useless bucket of dangerous waste industry transhipment mostlys come from various oil and chemical industry, that is, belongs to chemical pail pack, chemistry packet
Barrelling refers to all kinds of barreled packing containers, storing solid, liquid and the sticky chemicals of semi liquid state, is related to that organic, inorganic chemical industry is former
Material, product, wherein organic quantity is big, and type is various.Meet national recycling economy requirement using the recycling of rear pail pack,
But a large amount of pail packs are mostly by the spontaneous collection of enterprise for a long time, and cleaning is sold, due to lacking basic knowledge and pollution prevention measure
And facility, the waste water containing various chemicals are arbitrarily discharged, remaining chemical substance is dumped, abandons in some containers, thus makes
Occur often at contamination accident, polluted-water threatens the safety of ecological environment.
Chinese Ministry of Environmental Protection《National Hazard waste register》" it will contain or directly be infected with the discarded packing material of hazardous waste, container, clear
Wash sundries " danger wastes (HW49, dangerous waste code 900-041-49) are defined as, due to being related to dangerous waste also hazardous chemical range
Extensively, most of chemical pail pack is considered as danger wastes, and the processing disposition and regeneration of pail pack can be classified into danger
The scope of useless management and disposition.
Currently, for the waste oil paint can of generation, Some Enterprises are arbitrarily toppled over or are accumulated, and environmental pollution has been effectively caused；
If spent ink bucket has illegal the phenomenon that burning, Odor stimulation causes serious harm to ambient enviroment and the common people；It sells privately
It sells and also appears in useless bucket disposal process, but due to storing the unknown of waste liquid danger to the bucket that gives up, the behavior belongs to illegal
Transfer；Even there is enterprise to dispose dangerous waste collecting vessel without card, only scrap iron bucket sell again after simply cleaning, environment is caused
Serious pollution.
Utility model content
Against the above deficiency, the utility model is provided a kind of given up using pyrolysis gasification furnace processing transhipment and bucket and recycles and be
It is halfway to solve the problems, such as that the prior art is dealt with improperly or disposed to the useless bucket of transhipment for system.
Technical solution used by the utility model is：It is a kind of to transport useless bucket using pyrolysis gasification furnace processing and recycle
System, the system include useless bucket pretreatment system, feed system, pyrolysis system, slag-tapping system and former incineration system, and useless bucket is located in advance
Reason system includes carrier bar feeder and metal bucket crusher, and feed system includes belt discharging machine and bucket elevator, pyrolysis system
Including pyrolysis gasification furnace, slag-tapping system includes iron plate conveyer, and the carrier bar feeder is arranged in metal bucket crusher feed-inlet
Useless bucket is delivered in metal bucket crusher and is crushed by surface；Iron plate after the metal bucket crusher in crushing is gone out by belt
Material machine is sent into bucket elevator, and iron plate carries constantly overturning feeding until pyrolysis gasification furnace, the air of former incineration system are pre- by bucket
The hot-air of hot device displacement is sent into pyrolysis gasification furnace hot-wind inlet, the mixed flue gas of pyrolysis gasification furnace discharge by hot-air duct
The dual firing chamber of former incineration system is sent by high-temperature flue gas pipeline and high-temperature blower；Iron plate conveyer is arranged in pyrolytic gasification furnace bottom
Below the discharge port in portion.
Further, the pyrolysis gasification furnace has A stoves and B stoves, and the hot-air duct is forked in three, and there are one total for tool
Pipe and two branch pipes are provided with the first damper for switch the opening and closing of two branch pipes, manifold and original incineration system at trident
The hot air outlet end of air preheater displacement is connected, and a branch pipe is connected with the hot-wind inlet of A stoves, another branch pipe and B stoves
Hot-wind inlet be connected；The temperature flue is also in three forked, and tool is provided at trident there are one manifold and two branch pipe
The second damper for switching the opening and closing of two branch pipes, a branch pipe are connected with the mixed flue gas outlet of A stoves, another branch pipe
It is connected with the mixed flue gas outlet of B stoves, manifold is connected to dual firing chamber's inlet flue duct of former incineration system.
Further, the feed system has two sets, wherein a set of charging is to A stoves, it is another set of to feed to B stoves.
Further, the Tie Tong crusher uses four axis Tie Tong crushers, four axis mutual using different cutter structures
Cooperation.
Further, the length of the iron plate after the metal bucket crusher in crushing controls between 200~300mm, width control
System is between 50~70mm.
Further, the metal bucket crusher needs to configure nitrogen protecting system.
Further, former incineration system must configure air preheater, and the hot blast temperature replaced need to 400-450 DEG C it
Between.
Further, temperature is 950-1100 DEG C in the dual firing chamber of former incineration system.
Further, the high-temperature blower uses fire-proof motor, electric machine main shaft material to use 310S stainless steels, and impeller does resistance to
Mill processing.
The utility model has an advantageous effect in that：
1, dangerous waste metal bucket is more by after broken, can disposably put into, while increasing high temperature air and remaining waste
Time of contact and contact area, improve the safety of operating efficiency and working environment.
2, the operation format of the technique is AB stoves feed switched, discharge and gasification and pyrolysis, i.e., A stoves are when pyrolytic gasification
B stoves, which carry out discharge and feeding, the operation, can be further reduced time cost.
3, the form of AB stoves handover operation ensure that the hot-air of former incineration system air preheater can continue not first
Disconnected is passed through, and is opened to can be realized by the first damper of switching；Secondly under the action of high-temperature blower, the production of AB furnace gasizationes
Raw mixed flue gas trend can be opened to realize by switching the second damper.
4, in the case where being continuously fed to high temperature air and continuous discharge flue gas, it can be ensured that pyrolysis gasification furnace is constantly in
The state of one high temperature ensures that remaining waste can be gasified totally, while ensureing that all gas phase medias are suitable in entire cycle
It is smooth to carry out.
4, the setting of high-temperature blower plays the role of supercharging, and former incineration system is avoided the case where positive pressure tempering occur；Together
When be also beneficial to the control and operation of former incineration system, it is too big to be unlikely to operating mode load change.
5, pyrolytic gasification is carried out using the tail portion heat of former incineration system (i.e. 400 DEG C~450 DEG C of high temperature air), do not needed
Add extra auxiliary fuel；Waste liquid after gasification can realize really complete burning in the dual firing chamber of former incineration system, you can
Meet《Dangerous waste incineration pollutant catabolic gene standard》In the specification of 1100 DEG C of incineration temperature, gas residence time > 2s is wanted
It asks；Meanwhile vent gas treatment not will produce secondary pernicious gas pollution using former flue gas purification system.
6, the iron plate after pyrolytic gasification can be turned waste into wealth through recycling, saved resource and the energy, have centainly
Economic benefit.
The system is made of useless bucket pretreatment system, feed system, pyrolysis system, slag-tapping system, former incineration system.Entirely
The control of system can also run and stop manually on the spot, the time can also be arranged by automatically controlling, temporally all
Phase periodically starts.Spare interface simultaneously can access DCS, realize long-range operation.
Whole system is simple in structure, at low cost；Relative to other methods, this method need not spend a large amount of manpowers and object
Power saves a large amount of time.
Description of the drawings
Fig. 1 is that the utility model utilizes the useless bucket of pyrolysis gasification furnace processing transhipment and recycling system structure chart；
Fig. 2 be hot air temperature be 350 DEG C when scrap iron bucket TGA thermogravimetric analysis figures；
Fig. 3 be hot air temperature be 400 DEG C when scrap iron bucket TGA thermogravimetric analysis figures；
Fig. 4 be hot air temperature be 450 DEG C when scrap iron bucket TGA thermogravimetric analysis figures；
Fig. 5 be hot air temperature be 500 DEG C when scrap iron bucket TGA thermogravimetric analysis figures；
In figure：Carrier bar feeder 1, metal bucket crusher 2, belt discharging machine 3, bucket elevator 4, pyrolysis gasification furnace 5, iron plate
Conveyer 6, high-temperature blower 7, hot-air duct 8, high-temperature flue gas pipeline 9, trash receptacle transport vehicle 10.
Specific implementation mode
The utility model is described further with reference to embodiment and attached drawing.
As shown in Figure 1, a kind of utilization pyrolysis gasification furnace processing provided by the utility model is transported useless bucket and is recycled and is
System, the system include useless bucket pretreatment system, feed system, pyrolysis system, slag-tapping system and former incineration system.
The useless bucket pretreatment system includes carrier bar feeder 1 and metal bucket crusher 2, and the feed system includes that belt goes out
Material machine 3 and bucket elevator 4, the pyrolysis system include pyrolysis gasification furnace 5, and the slag-tapping system includes iron plate conveyer 6, institute
The carrier bar feeder 1 stated is arranged right over 2 feed inlet of metal bucket crusher, and useless bucket is delivered in metal bucket crusher 2 and is broken
It is broken；2 broken iron plate of the metal bucket crusher is sent into bucket elevator 4 by belt discharging machine 3, and iron plate carries constantly by bucket
Feeding is overturn until pyrolysis gasification furnace 5, former incineration system must configure air preheater, and the hot blast temperature replaced need to be in 400-
Between 450 DEG C；The hot-air of the air preheater displacement of former incineration system is sent into 5 heat of pyrolysis gasification furnace by hot-air duct 8
Wind entrance, the mixed flue gas that pyrolysis gasification furnace 5 is discharged are sent into former incineration system by high-temperature flue gas pipeline 9 and high-temperature blower 7
Dual firing chamber, temperature is 950-1100 DEG C in the dual firing chamber of former incineration system；Iron plate conveyer 6 is arranged in 5 bottom of pyrolysis gasification furnace
Discharge port below.
The chain stripe pitch that combination useless bucket bucket diameter reasonable design is needed when carrier bar feeder 1 designs, to ensure the bucket that gives up
Continuous conveying.Tie Tong crusher 2 uses four axis Tie Tong crushers, four axis to work in coordination using different cutter structures, ensure to cut
Cut efficient, material size is uniform and easy to control after being crushed, and broken iron plate size should not be too big, and optimum length control exists
200~300mm, width are controlled in 50~70mm, and metal bucket crusher 2 needs to configure nitrogen protecting system.
In order to meet the persistent loop of cigarette wind, i.e. high-temperature blower 7 is not necessarily to operate intermittently, while can regular batch processed scrap iron
Bucket, technique consider that 2 feed systems, 2 pyrolysis systems and 2 slag-tapping systems, the pyrolysis gasification furnace 5 have A stoves and B stoves,
The hot-air duct 8 is forked in three, and there are one manifold and two branch pipes for tool.It is provided at trident and is opened for switching two branch pipes
The first damper closed, manifold are connected with the hot air outlet end of the air preheater of former incineration system, a branch pipe and A stoves
Hot-wind inlet be connected, another branch pipe is connected with the hot-wind inlet of B stoves；The temperature flue 9 is also in three forked, is had
One manifold and two branch pipe is provided with the second damper for switching the opening and closing of two branch pipes, a branch pipe and A stoves at trident
Mixed flue gas outlet be connected, another branch pipe is connected with the mixed flue gas outlet of B stoves, and manifold, which is connected to, former burns system
Dual firing chamber's inlet flue duct of system.After i.e. A stoves complete feeding and meet the condition of pyrolytic gasification, the first damper of the furnace sides A is opened
Plate and the second damper make the hot-air that the air preheater of former incineration system is replaced pass through hot-air duct 8 and are sent into A stove heat
Wind entrance, the mixed flue gas that A fire grates go out are sent into the dual firing chamber of former incineration system, structure by high-temperature flue gas pipeline 9 and high-temperature blower 7
At the cycle of A stoves, the mixed flue gas outlet of B stoves hot-wind inlet and B stoves is turned off at this time；Conversely, B stoves are completed feeding and are met
After the condition of pyrolytic gasification, the first damper and the second damper of the furnace sides B are opened, the air preheat of former incineration system is made
The hot-air of device displacement is sent into B stove hot-wind inlets by hot-air duct 8, and the mixed flue gas that B fire grates go out passes through high-temperature flue gas pipe
Road 9 and high-temperature blower 7 are sent into the dual firing chamber of former incineration system, constitute the cycle of B stoves, the at this time mixing of A stoves hot-wind inlet and A stoves
Flue gas discharge opening is turned off.
Correspondingly, the feed system has two sets, wherein a set of charging is to A stoves, another set of charging is to B stoves, to realize
The single line of pyrolysis gasification furnace 5 is fed, i.e., A stoves, B stoves can realize independent feeding.The belt discharging machine 3 and bucket lifting of single line
The design continuous operation of machine 4, ensures that feeding can be rapidly completed in pyrolysis gasification furnace 5.If A stoves are in feeding state, the feeding of the furnace sides B
Device is in halted state, on the contrary.
5 feed inlet of the pyrolysis gasification furnace is at top, and discharge port is in bottom, and hot wind inlet is in side surface upper part, exhanst gas outlet
In side lower.To ensure 5 inlet port and outlet port of pyrolysis gasification furnace when deslagging while open, hot wind inlet and mixed flue gas
Outlet must shut off, and pyrolysis gasification furnace 5 is the state for a gravity-flow ventilation at this time.Either A stoves or B stoves are in pyrolysis
The operating mode of gasification, it is necessary to assure the inlet port and outlet port of the stove are in closed position, but its hot wind inlet and mixed flue gas
Outlet must open, that is, have hot-air into, it is necessary to have displacement flue gas export, pyrolysis gasification furnace 5 is in a cigarette wind at this time
The state of cycle.
The core process of the technology is realized in pyrolysis gasification furnace 5, that is, completes the gasification of waste liquid and paint, hot-air
(400-450 DEG C) enters pyrolysis gasification furnace 5 under the suction of high-temperature blower 7, from high temperature air pipeline 8.It is being continually fed into hot sky
In the case of gas, the liquid of gasification is constantly carried away, and being sent into former incineration system dual firing chamber by high-temperature blower 7 carries out high warm
It solves (950-1100 DEG C).Iron plate after gasification process has got rid of the residue on surface, can be completed by iron plate conveyer 6
Continuously slag tap.
The high-temperature blower 7 uses fire-proof motor, electric machine main shaft material that 310S stainless steels, impeller is used to do Wear-resistant Treatment.
By TGA thermogravimetric analysis it is found that the quality of metal bucket will be reduced no longer after high temperature air is continually fed into 30 minutes, i.e.,
Weight curves tend towards stability, and can take that the substances such as waste liquid, paint have been gasified totally as.This technological design hot-air is continually fed into 1
Hour, it is further ensured that the gasification of the liquid such as waste liquid, paint, achievees the purpose that the maintenance of scrap iron bucket weight-loss ratio is basically unchanged.
As shown in Figure 2-5, by TGA thermogravimetric analysis it is found that at 350 DEG C, DTA (Differential Thermal
Analysis) curve increasess slowly, i.e. heat release is slower than other temperature；At 500 DEG C, there are descending brancies for DTA curve, that is, absorb heat
The case where.To sum up, between the temperature of hot-air is chosen at 400-450 DEG C by this technique, from figure as can be seen that in the humidity province
Between operate 30 minutes after, DTA growth rate are most fast, i.e. remaining waste is presented the heat release state being exceedingly fast, and weight-loss ratio is on 13% left side
It is right.
The course of work of the utility model is as follows：
Step 1：Vehicle 10 is transported by trash receptacle trash receptacle is transported on carrier bar feeder 1, carrier bar feeder 1 transports useless bucket
It transports in metal bucket crusher 2 and is crushed；
Step 2：Broken iron plate is sent into bucket elevator 4 by belt discharging machine 3, iron plate is carried by bucket and constantly being turned over
Turn feeding until in the A stoves of pyrolysis gasification furnace 5；
Step 3：The head cover and bottom cover of A stoves are covered, i.e., when the case where A stoves are in pyrolytic gasification, opens the first wind of the furnace sides A
Door guard plate and the second damper make the hot-air that the air preheater of former incineration system is replaced pass through hot-air duct 8 and are sent into A
Stove hot-wind inlet, the mixed flue gas that A fire grates go out are sent into two combustions of former incineration system by high-temperature flue gas pipeline 9 and high-temperature blower 7
Room constitutes the cycle of A stoves, and the mixed flue gas outlet of B stoves hot-wind inlet and B stoves is turned off at this time；
Step 4：While step 3 carries out, broken iron plate is sent into another bucket by another belt discharging machine 3
Formula elevator 4, iron plate carry constantly overturning feeding until in the B stoves of pyrolysis gasification furnace 5 by bucket；
Step 5：After the pyrolysis processing for completing step 3, the first damper and the second damper of the furnace sides A are closed, is beaten
The head cover and bottom cover for opening A stoves send out iron plate after pyrolysis processing by iron plate conveyer 6；
Step 6：After the operation for completing the first damper and the second damper of the furnace sides A of step 5, B is opened immediately
The first damper and the second damper of furnace side make the hot-air that the air preheater of former incineration system is replaced pass through hot sky
Feed channel 8 is sent into B stove hot-wind inlets, and the mixed flue gas that B fire grates go out is sent into original by high-temperature flue gas pipeline 9 and high-temperature blower 7 and is burnt
The dual firing chamber of burning system constitutes the cycle of B stoves, and the mixed flue gas outlet of A stoves hot-wind inlet and A stoves is turned off at this time；
Step 7：After the pyrolysis processing for completing step 6, the first damper and the second damper of the furnace sides B are closed, is beaten
The head cover and bottom cover for opening B stoves send out iron plate after pyrolysis processing by iron plate conveyer 6；
Step 8：A scrap iron bucket pyrolytic gasification cycle is completed by step 2 to step 7.
In face of dangerous waste transport give up bucket constantly generate and the incorrect background of method of disposal under, this technology can fundamentally by
Remaining waste liquid and paint remove, and realize the innoxious recycling of metal bucket.This technique and device can be in quantitative, timing controls
Under, fully automatic operation is realized by the PLC controls and former incineration system DCS monitoring of system.
The utility model considers operation gearingization in design, and equipment runs low failure, UTILIZATION OF VESIDUAL HEAT IN, technique letter
The design concepts such as listization, and to the heat dissipation of whole system, the links such as closing are considered, and are a set of safe and reliable processing systems
System.
Claims (9)
1. a kind of utilizing the useless bucket of pyrolysis gasification furnace processing transhipment and recycling system, which is characterized in that the system includes useless bucket
Pretreatment system, feed system, pyrolysis system, slag-tapping system and former incineration system, the bucket pretreatment system that gives up includes carrier bar feeding
Machine and metal bucket crusher, feed system include belt discharging machine and bucket elevator, and pyrolysis system includes pyrolysis gasification furnace, is slagged tap
System includes iron plate conveyer, and the carrier bar feeder is arranged right over metal bucket crusher feed-inlet, and useless bucket is delivered to
It is crushed in metal bucket crusher；Iron plate after the metal bucket crusher in crushing is sent into bucket elevator by belt discharging machine,
Iron plate carries constantly overturning feeding until pyrolysis gasification furnace, the hot-air of the air preheater displacement of former incineration system pass through by bucket
Hot-air duct is sent into pyrolysis gasification furnace hot-wind inlet, and the mixed flue gas of pyrolysis gasification furnace discharge passes through high-temperature flue gas pipeline and height
Warm air machine is sent into the dual firing chamber of former incineration system；Iron plate conveyer is arranged below the discharge port of pyrolytic gasification furnace bottom.
2. a kind of handled using pyrolysis gasification furnace according to claim 1 transports give up bucket and recycling system, feature
It is, the pyrolysis gasification furnace has A stoves and B stoves, and the hot-air duct is forked in three, and there are one manifold and two branch for tool
It manages, the first damper for switching the opening and closing of two branch pipes, manifold and former incineration system air preheater is provided at trident
Hot air outlet end be connected, a branch pipe is connected with the hot-wind inlet of A stoves, and another branch pipe is connected with the hot-wind inlet of B stoves
It is logical；The temperature flue is also in three forked, and tool is provided with for switching two branch at trident there are one manifold and two branch pipe
Second damper of pipe opening and closing, a branch pipe are connected with the mixed flue gas outlet of A stoves, the mixing cigarette of another branch pipe and B stoves
Gas outlet is connected, and manifold is connected to dual firing chamber's inlet flue duct of former incineration system.
3. a kind of handled using pyrolysis gasification furnace according to claim 2 transports give up bucket and recycling system, feature
It is, the feed system has two sets, wherein a set of charging is to A stoves, it is another set of to feed to B stoves.
4. a kind of handled using pyrolysis gasification furnace according to claim 2 transports give up bucket and recycling system, feature
It is, the metal bucket crusher uses four axis Tie Tong crushers, four axis to work in coordination using different cutter structures.
5. a kind of handled using pyrolysis gasification furnace according to claim 1 transports give up bucket and recycling system, feature
It is, the length of the iron plate after the metal bucket crusher in crushing controls between 200~300mm, and width is controlled in 50~70mm
Between.
6. a kind of handled using pyrolysis gasification furnace according to claim 1 transports give up bucket and recycling system, feature
It is, the metal bucket crusher needs to configure nitrogen protecting system.
7. a kind of handled using pyrolysis gasification furnace according to claim 1 transports give up bucket and recycling system, feature
It is, former incineration system must configure air preheater, and the hot blast temperature replaced need to be between 400-450 DEG C.
8. a kind of handled using pyrolysis gasification furnace according to claim 1 transports give up bucket and recycling system, feature
It is, temperature is 950-1100 DEG C in the dual firing chamber of former incineration system.
9. a kind of handled using pyrolysis gasification furnace according to claim 1 transports give up bucket and recycling system, feature
It is, the high-temperature blower uses fire-proof motor, electric machine main shaft material that 310S stainless steels, impeller is used to do Wear-resistant Treatment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820233139.4U CN208042160U (en) | 2018-02-09 | 2018-02-09 | It is a kind of to utilize the useless bucket of pyrolysis gasification furnace processing transhipment and recycling system |
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| CN201820233139.4U CN208042160U (en) | 2018-02-09 | 2018-02-09 | It is a kind of to utilize the useless bucket of pyrolysis gasification furnace processing transhipment and recycling system |
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ID=63952641
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167842A (en) * | 2018-02-09 | 2018-06-15 | 浙江物华天宝能源环保有限公司 | It is a kind of to utilize the useless bucket of pyrolysis gasification furnace processing transhipment and recycling system and its technique |
| CN112460597A (en) * | 2020-11-30 | 2021-03-09 | 辽阳东方波特蓝环保科技有限公司 | Method for disposing of hazardous waste |
-
2018
- 2018-02-09 CN CN201820233139.4U patent/CN208042160U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167842A (en) * | 2018-02-09 | 2018-06-15 | 浙江物华天宝能源环保有限公司 | It is a kind of to utilize the useless bucket of pyrolysis gasification furnace processing transhipment and recycling system and its technique |
| CN112460597A (en) * | 2020-11-30 | 2021-03-09 | 辽阳东方波特蓝环保科技有限公司 | Method for disposing of hazardous waste |
| CN112460597B (en) * | 2020-11-30 | 2023-05-02 | 辽阳东方波特蓝环保科技有限公司 | Method for disposing dangerous waste |
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