CN209229753U - A kind of incineration flue gas of household garbage purification device - Google Patents
A kind of incineration flue gas of household garbage purification device Download PDFInfo
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- CN209229753U CN209229753U CN201821254062.5U CN201821254062U CN209229753U CN 209229753 U CN209229753 U CN 209229753U CN 201821254062 U CN201821254062 U CN 201821254062U CN 209229753 U CN209229753 U CN 209229753U
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- dust removing
- temperature control
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Abstract
The utility model discloses a kind of incineration flue gas of household garbage purification device, described device includes: incinerator；Waste heat boiler；Temperature control equipment；The primary dust removing device being connected to temperature control equipment；Active carbon injection apparatus between primary dust removing device and temperature control equipment；The two-stage dust removal device being connected to primary dust removing device；Calcium hydroxide injection apparatus between two-stage dust removal device and primary dust removing device；The wet process reaction tower being connected to two-stage dust removal device；The heat exchanger being connected to wet process reaction tower；The flue gas heater being connected to heat exchanger；The selective catalytic denitrification process device being connected to flue gas heater；The smoke evacuation system being connected to the selective catalytic denitrification process device.By the utility model, the flying dust categorised collection of different toxicity is reached, conducive to flying dust minimizing, recycling, the technical effect of harmlessness disposing, has solved that incineration of refuse flyash cost of disposal in the prior art is high, technical problem of effect difference.
Description
Technical field
The utility model relates to fixed-end forces technical field more particularly to a kind of incineration flue gas of household garbage purification devices.
Background technique
Domestic garbage burning electricity generation is the main way of current Disposal of City Domestic Garbage.Flying dust is consumer waste incineration mistake
Cheng Zhong is trapped the waste formed by flue gas purification device, is typical " fine powder material bulk solid " solid waste, and yield is to burn
The 3%~5% of quantity of refuse.It since it is rich in high concentration heavy metal and other harmful substances, is detrimental to health, belongs to dangerous useless
Gurry.
The traditional flue gas purification device of garbage incinerating power plant includes semidry method reaction tower, calcium hydroxide injection apparatus, activity
Charcoal injection apparatus, dust-extraction unit, wet process, SCR.Primary dust removing device is only arranged in traditional flue gas purification device, and flue gas passes through furnace
Interior injection ammonium hydroxide denitration, semidry method reaction tower injection calcium hydroxide slurries depickling spray the depickling of calcium hydroxide dry powder in pipeline, in pipeline
Activated carbon adsorption heavy metal and dioxin are sprayed, then traps flying dust into dust-extraction unit, therefore the flying dust trapped includes heavy metal, two
Dislike the salts substances such as the chloride of the noxious materials such as English and depickling formation.
Domestic and international flying dust disposing technique includes the technologies such as solidification and stabilization, solvent extraction, high-temperature heat treatment.In recent years because passing
There is system solidification stabilization process chelating at high cost, dust pollution, ammonia taste to dissipate, landfill storage capacity utilization rate is low, rainy season influences to fill out
The deficiencies of burying operation, landfill yard risk of leakage；Solvent extraction process have volume reduction rate is small, solidfied material stability is poor, it is at high cost, account for
The deficiencies of ground is big；High-temperature heat treatment process includes the techniques such as cement kiln synergic processing, sintering ceramsite, high-temperature fusion, at high warm
Science and engineering skill because taking up little area, solidfied material stability is good, resource utilization degree is high etc., and factors are increasingly concerned.
Present inventor during the implementation of the utility model technical solution in the embodiments of the present application, has found above-mentioned technology
At least have the following technical problems:
Currently, traditional flue gas purification device can not be by the flying dust containing noxious materials such as heavy metal, dioxin and with chlorination
Flying dust categorised collection based on the salts such as object.
Summary of the invention
The utility model embodiment provides a kind of incineration flue gas of household garbage purification device and is reached by the utility model
The flying dust categorised collection of different toxicity has been arrived, conducive to flying dust minimizing, recycling, the technical effect of harmlessness disposing, has been solved
Incineration of refuse flyash disposes Expenses Cost height, disposes the technical problem of effect difference.
The utility model embodiment provides a kind of incineration flue gas of household garbage purification device, and described device includes: to burn
Furnace, the incinerator burning domestic garbage；Waste heat boiler, the waste heat boiler are connected to the incinerator；Temperature control equipment,
The temperature control equipment is connected to the waste heat boiler；Primary dust removing device, the primary dust removing device and the temperature control
Device processed is connected to by pipeline；Active carbon injection apparatus, the active carbon injection apparatus are set to the primary dust removing device and institute
It states in the pipeline that temperature control equipment connects；Two-stage dust removal device, the two-stage dust removal device and the primary dust removing device are logical
Piping connection；Calcium hydroxide injection apparatus, the calcium hydroxide injection apparatus are set to the two-stage dust removal device and remove with the level-one
In the pipeline of dirt device connection；Wet process reaction tower, the wet process reaction tower are connected to the two-stage dust removal device；Heat exchanger, institute
Heat exchanger is stated to be connected to the wet process reaction tower；Flue gas heater, the flue gas heater are connected to the heat exchanger；Selectivity
One end of catalytic denitration device, the selective catalytic denitrification process device is connected to the flue gas heater；Smoke evacuation system, the row
Cigarette system is connected to the other end of the selective catalytic denitrification process device, and the smoke evacuation system and the selective catalytic denitrification process
The part connecting pipe of device is set to inside the heat exchanger.
Preferably, two-stage dust-extraction unit is arranged in the flue gas purification device.
Preferably, described device further include: return cigarette channel, described time cigarette channel be set to the primary dust removing device with it is described
Between the connecting pipe of two-stage dust removal device and the incinerator.
Preferably, primary dust removing device is set after the temperature control equipment, and setting active carbon sprays in connecting pipe
Device.
Preferably, two-stage dust removal device is set after the primary dust removing device, and setting calcium hydroxide sprays in connecting pipe
Device.
Preferably, the wet process reaction tower is arranged before the selective catalytic denitrification process device.
Preferably, the part connecting pipe of the wet process reaction tower and the selective catalytic denitrification process device is set to the cigarette
Inside gas heating unit.
Said one or multiple technical solutions in the utility model embodiment at least have following one or more technologies
Effect:
1, the utility model embodiment provides a kind of incineration flue gas of household garbage purification device, and described device includes: to burn
Furnace, the incinerator burning domestic garbage；Waste heat boiler, the waste heat boiler are connected to the incinerator；Temperature control equipment,
The temperature control equipment is connected to the waste heat boiler；Primary dust removing device, the primary dust removing device and the temperature control
Device processed is connected to by pipeline；Active carbon injection apparatus, the active carbon injection apparatus are set to the primary dust removing device and institute
It states in the pipeline that temperature control equipment connects；Two-stage dust removal device, the two-stage dust removal device and the primary dust removing device are logical
Piping connection；Calcium hydroxide injection apparatus, the calcium hydroxide injection apparatus are set to the two-stage dust removal device and remove with the level-one
In the pipeline of dirt device connection；Wet process reaction tower, the wet process reaction tower are connected to the two-stage dust removal device；Heat exchanger, institute
Heat exchanger is stated to be connected to the wet process reaction tower；Flue gas heater, the flue gas heater are connected to the heat exchanger；Selectivity
One end of catalytic denitration device, the selective catalytic denitrification process device is connected to the flue gas heater；Smoke evacuation system, the row
Cigarette system is connected to the other end of the selective catalytic denitrification process device, and the smoke evacuation system and the selective catalytic denitrification process
The part connecting pipe of device is set to inside the heat exchanger.By the utility model, the flying dust classification of different toxicity is reached
Collect, conducive to flying dust minimizing, recycling, the technical effect of harmlessness disposing, solve incineration of refuse flyash disposition expend at
This height disposes the technical problem of effect difference.
2, the utility model embodiment provides a kind of incineration flue gas of household garbage purification device, and the primary dust removing device is received
The flying dust yield of collection is big, and Si/Ca is appropriate, and Cl content is low, and heavy metal and dioxin concentration are high, is conducive to flying dust and carries out at high warm
Science and engineering skill is disposed.The flying dust for only having the trapping of primary dust removing device compared to traditional flue gas purification device carries out high-temperature heat treatment work
Skill, the flying dust carry out can avoid water-washing pre-treatment when the flying dusts disposing techniques such as cement kiln synergic processing, sintering ceramsite, save water money
Source carries out that Si additive capacity can be reduced when high-temperature fusion disposing technique, and low to the equipment extent of corrosion of resistance to material, and gas cleaning is not necessarily to
A large amount of alkali removal chloride is added, energy consumption and operation cost are reduced.
3, the utility model embodiment provides a kind of incineration flue gas of household garbage purification device, and the two-stage dust removal device is received
The flying dust yield of collection is small, and heavy metal and dioxin concentration are low, and based on alkali metal chloride, resourcebility utilizes main component
It is regenerated as deacidification agent or deicing salt, the innoxious, recycling treatment conducive to flying dust.
The above description is merely an outline of the technical solution of the present invention, in order to better understand the technology of utility model
Means, and being implemented in accordance with the contents of the specification, and in order to allow above and other purpose of the utility model, feature and
Advantage can be more clearly understood, special below to lift specific embodiment of the present utility model.
Detailed description of the invention
Fig. 1 is a kind of incineration flue gas of household garbage purification device structural schematic diagram provided by the embodiment of the utility model.
Description of symbols: incinerator 1；Waste heat boiler 2；Temperature control equipment 3；Active carbon injection apparatus 4；Primary dust removing
Device 5；Calcium hydroxide injection apparatus 6；Two-stage dust removal device 7；Wet process reaction tower 8；Heat exchanger 9；Flue gas heater 10；Selectivity is urged
Change denitrification apparatus 11；Air-introduced machine 12；Chimney 13.
Specific embodiment
The utility model embodiment has reached different toxicity by providing a kind of incineration flue gas of household garbage purification device
Flying dust categorised collection solves at incineration of refuse flyash conducive to flying dust minimizing, recycling, the technical effect of harmlessness disposing
Expenses Cost height is set, the technical problem of effect difference is disposed.
The technical scheme in the embodiment of the utility model, general thought are as follows: a kind of incineration flue gas of household garbage purification dress
It sets, described device includes: incinerator, the incinerator burning domestic garbage；Waste heat boiler, the waste heat boiler and the burning
Furnace connection；Temperature control equipment, the temperature control equipment are connected to the waste heat boiler；Primary dust removing device, the level-one
Dust-extraction unit is connected to the temperature control equipment by pipeline；Active carbon injection apparatus, the active carbon injection apparatus are set to
In the pipeline that the primary dust removing device and the temperature control equipment connect；Two-stage dust removal device, the two-stage dust removal device
It is connected to the primary dust removing device by pipeline；Calcium hydroxide injection apparatus, the calcium hydroxide injection apparatus are set to the second level
In the pipeline that dust-extraction unit is connected to the primary dust removing device；Wet process reaction tower, the wet process reaction tower are removed with the second level
The connection of dirt device；Heat exchanger, the heat exchanger are connected to the wet process reaction tower；Flue gas heater, the flue gas heater with
The heat exchanger connection；The selective catalytic denitrification process device, one end of the selective catalytic denitrification process device and the flue gas
Device connection；Smoke evacuation system, the smoke evacuation system are connected to the other end of the selective catalytic denitrification process device, and the smoke evacuation is
The part connecting pipe of system and the selective catalytic denitrification process device is set to inside the heat exchanger.By the utility model, reach
The flying dust categorised collection of different toxicity has been arrived, conducive to flying dust minimizing, recycling, the technical effect of harmlessness disposing, has been solved
Incineration of refuse flyash disposes Expenses Cost height, disposes the technical problem of effect difference.
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention,
Every other embodiment obtained by those of ordinary skill in the art without making creative efforts, belongs to this reality
With novel protected range.
Embodiment one
As shown in Figure 1, the utility model provides a kind of incineration flue gas of household garbage purification device, described device includes:
Incinerator 1,1 burning domestic garbage of incinerator；
Specifically, as shown in Figure 1, the incinerator 1 is for burning the house refuse.
Waste heat boiler 2, the waste heat boiler 2 are connected to the incinerator 1；
Specifically, as shown in Figure 1, thermal energy recycling of the waste heat boiler 2 for being generated in burning process.
Temperature control equipment 3, the temperature control equipment 3 are connected to the waste heat boiler 2；
Specifically, flue gas passes through temperature control equipment as shown in Figure 1, the temperature control equipment 3 includes a spray equipment
When 3, spray equipment shower water, for reducing flue-gas temperature.
Primary dust removing device 5, the primary dust removing device 5 are connected to the temperature control equipment 3 by pipeline；
Specifically, the flying dust yield that the primary dust removing device 5 is collected is big, Si/Ca is appropriate, and Cl content is low, heavy metal
And dioxin concentration is high, carries out high-temperature heat treatment process conducive to flying dust and is disposed.Only have one compared to traditional flue gas purification device
The flying dust that grade dust-extraction unit 5 traps carries out can avoid washing when the flying dusts disposing techniques such as cement kiln synergic processing, sintering ceramsite pre-
Water resource is saved in processing, carries out that Si additive capacity can be reduced when high-temperature fusion disposing technique, and to the equipment extent of corrosion of resistance to material
Low, gas cleaning reduces energy consumption and operation cost without adding a large amount of alkali removal chloride.
Active carbon injection apparatus 4, the active carbon injection apparatus 4 are set to the primary dust removing device 5 and the temperature control
In the pipeline that device 3 processed connects；Further, primary dust removing device 5 is set after the temperature control equipment, in connecting pipe
Active carbon injection apparatus 4 is set.
Specifically, the setting of active carbon injection apparatus 4 is in the temperature control equipment 3 and the primary dust removing device 5
Between inner wall of the pipe, the active carbon injection apparatus 4 sprays active carbon particle, adsorbs heavy metal and dioxin etc. in flue gas
Active carbon particle after absorption is simultaneously discharged into the primary dust removing device 5 by noxious material.
Two-stage dust removal device 7, the two-stage dust removal device 7 are connected to the primary dust removing device 5 by pipeline；Further
The flue gas purification device be arranged two-stage dust-extraction unit.Further, described device further include: return cigarette channel, described time cigarette
Channel is set between the primary dust removing device 5 and the connecting pipe and the incinerator 1 of the two-stage dust removal device 7.
Specifically, the flying dust yield that the two-stage dust removal device 7 is collected is small, heavy metal and dioxin concentration are low, mainly
Ingredient is based on alkali metal chloride, and resourcebility is using deacidification agent or deicing salt is regenerated as, the innoxious, recycling conducive to flying dust
Processing；The primary dust removing device 5 and the two-stage dust removal device 7 are bag-type dust collector, and bag-type dust collector is pocket type
Key component in dust-extraction unit operational process, usual cylinder type filter bag are vertically hung in dust-extraction unit.Dust-removal cloth-bag
Fabric and design should pursue high efficiency filter as far as possible, be easy to dust removing and durable effect.The selection of dust-removal cloth-bag is to Guan Chong
Want, it directly affects the dust removing effects of dust-extraction unit, selection dust-removal cloth-bag from it is following it is several in terms of choose and select: the temperature of gas
Degree, wetness and chemically, granular size, dust content, filtration velocity, the factors such as clear dirt mode.Smoke-returning pipeline can be by level-one
Flue gas after dust-extraction unit dedusting leads back incinerator by air-introduced machine again, again full combustion, adjusts incinerator burner hearth and includes
Oxygen amount and temperature inhibit NO_x formation.
Calcium hydroxide injection apparatus 6, the calcium hydroxide injection apparatus 6 are set to the two-stage dust removal device 7 and remove with the level-one
In the pipeline that dirt device 5 is connected to；Further, two-stage dust removal device is set after the primary dust removing device, in connecting pipe
Calcium hydroxide injection apparatus is set.
Specifically, the setting of calcium hydroxide injection apparatus 6 is in the primary dust removing device 5 and the two-stage dust removal device 7
Between inner wall of the pipe, the calcium hydroxide injection apparatus 6 sprays HCl etc. in calcium hydroxide dry powder or sodium bicarbonate powder, with flue gas
Neutralization reaction occurs for acidic materials, and the chloride salt of generation and unreacted calcium hydroxide dry powder or sodium bicarbonate powder are discharged into institute
State two-stage dust removal device 7.
Wet process reaction tower 8, the wet process reaction tower 8 are connected to the two-stage dust removal device 7；Further, the wet process
Reaction tower is arranged before the selective catalytic denitrification process device.
Specifically, the wet process reaction tower 8 uses scrubbing tower form, by spraying lye NaOH solution, further remove
The acidic materials such as HCl, HF, SOx, heavy metal and organic matter in flue gas.
Heat exchanger 9, the heat exchanger 9 are connected to the wet process reaction tower 8；
Specifically, the heat exchanger 9 is gas-to-gas heat exchanger, i.e. GGH, by being gone out using the selective catalytic denitrification process device 11
Flue gas at mouthful is by the flue gas in 8 exit of wet process reaction tower.
Flue gas heater 10, the flue gas heater 10 are connected to the heat exchanger 9；
Specifically, the flue gas heater 10 is steam-flue gas heater, i.e. SGH, for it will enter SCR device before
Flue gas reheats.
The selective catalytic denitrification process device 11, one end of the selective catalytic denitrification process device 11 and the flue gas heater 10
Connection；
Specifically, the selective catalytic denitrification process device 11 is SCR device, spray ammonium hydroxide or urea are water-soluble in SCR device
Liquid, flue gas is by catalyst layer, in catalyst surface NH3Selective reaction is carried out with NOx, the NOx in flue gas is reduced to N2With
H2O。
Smoke evacuation system, the smoke evacuation system is connected to the other end of the selective catalytic denitrification process device 11, and the row
Cigarette system and the part connecting pipe of the selective catalytic denitrification process device 11 are set to inside the heat exchanger 9.The wet process is anti-
The part connecting pipe of tower 8 and the selective catalytic denitrification process device 11 is answered to be set to inside the flue gas unit 10.
Specifically, the chimney 13 is connect with the air-introduced machine 12 by pipeline.The air-introduced machine 12 is by purified cigarette
Gas is drawn, and drains into atmosphere by the chimney 13.
A kind of incineration flue gas of household garbage purification device provided by the embodiment of the utility model has the following technical effect that
1, the utility model embodiment provides a kind of incineration flue gas of household garbage purification device, and described device includes: to burn
Furnace, the incinerator burning domestic garbage；Waste heat boiler, the waste heat boiler are connected to the incinerator；Temperature control equipment,
The temperature control equipment is connected to the waste heat boiler；Primary dust removing device, the primary dust removing device and the temperature control
Device processed is connected to by pipeline；Active carbon injection apparatus, the active carbon injection apparatus are set to the primary dust removing device and institute
It states in the pipeline that temperature control equipment connects；Two-stage dust removal device, the two-stage dust removal device and the primary dust removing device are logical
Piping connection；Calcium hydroxide injection apparatus, the calcium hydroxide injection apparatus are set to the two-stage dust removal device and remove with the level-one
In the pipeline of dirt device connection；Wet process reaction tower, the wet process reaction tower are connected to the two-stage dust removal device；Heat exchanger, institute
Heat exchanger is stated to be connected to the wet process reaction tower；Flue gas heater, the flue gas heater are connected to the heat exchanger；Selectivity
One end of catalytic denitration device, the selective catalytic denitrification process device is connected to the flue gas heater；Smoke evacuation system, the row
Cigarette system is connected to the other end of the selective catalytic denitrification process device, and the smoke evacuation system and the selective catalytic denitrification process
The part connecting pipe of device is set to inside the heat exchanger.By the utility model, the flying dust classification of different toxicity is reached
Collect, conducive to flying dust minimizing, recycling, the technical effect of harmlessness disposing, solve incineration of refuse flyash disposition expend at
This height disposes the technical problem of effect difference.
2, the utility model embodiment provides a kind of incineration flue gas of household garbage purification device, and the primary dust removing device is received
The flying dust yield of collection is big, and Si/Ca is appropriate, and Cl content is low, and heavy metal and dioxin concentration are high, is conducive to flying dust and carries out at high warm
Science and engineering skill is disposed.The flying dust for only having the trapping of primary dust removing device compared to traditional flue gas purification device carries out high-temperature heat treatment work
Skill, the flying dust carry out can avoid water-washing pre-treatment when the flying dusts disposing techniques such as cement kiln synergic processing, sintering ceramsite, save water money
Source carries out that Si additive capacity can be reduced when high-temperature fusion disposing technique, and low to the equipment extent of corrosion of resistance to material, and gas cleaning is not necessarily to
A large amount of alkali removal chloride is added, energy consumption and operation cost are reduced.
3, the utility model embodiment provides a kind of incineration flue gas of household garbage purification device, and the two-stage dust removal device is received
The flying dust yield of collection is small, and heavy metal and dioxin concentration are low, and based on alkali metal chloride, resourcebility utilizes main component
It is regenerated as deacidification agent or deicing salt, the innoxious, recycling treatment conducive to flying dust.
Obviously, those skilled in the art the utility model embodiment can be carried out various modification and variations without departing from
The spirit and scope of the utility model embodiment.In this way, if these modifications and variations of the utility model embodiment belong to this
Within the scope of utility model claims and its equivalent technologies, then the utility model is also intended to encompass these modification and variations and exists
It is interior.
Claims (7)
1. a kind of incineration flue gas of household garbage purification device, which is characterized in that described device includes:
Incinerator, the incinerator burning domestic garbage；
Waste heat boiler, the waste heat boiler are connected to the incinerator；
Temperature control equipment, the temperature control equipment are connected to the waste heat boiler；
Primary dust removing device, the primary dust removing device are connected to the temperature control equipment by pipeline；
Active carbon injection apparatus, the active carbon injection apparatus is set to the primary dust removing device and the temperature control equipment is logical
In the pipeline connect；
Two-stage dust removal device, the two-stage dust removal device are connected to the primary dust removing device by pipeline；
Calcium hydroxide injection apparatus, the calcium hydroxide injection apparatus is set to the two-stage dust removal device and the primary dust removing device connects
In logical pipeline；
Wet process reaction tower, the wet process reaction tower are connected to the two-stage dust removal device；
Heat exchanger, the heat exchanger are connected to the wet process reaction tower；
Flue gas heater, the flue gas heater are connected to the heat exchanger；
One end of the selective catalytic denitrification process device, the selective catalytic denitrification process device is connected to the flue gas heater；
Smoke evacuation system, the smoke evacuation system is connected to the other end of the selective catalytic denitrification process device, and the smoke evacuation system
It is set to inside the heat exchanger with the part connecting pipe of the selective catalytic denitrification process device.
2. device as described in claim 1, which is characterized in that two-stage dust-extraction unit is arranged in the flue gas purification device.
3. device as described in claim 1, which is characterized in that described device further include:
Cigarette channel is returned, described time cigarette channel is set to connecting pipe and the institute of the primary dust removing device and the two-stage dust removal device
It states between incinerator.
4. device as described in claim 1, which is characterized in that primary dust removing device is set after the temperature control equipment,
Active carbon injection apparatus is set in connecting pipe.
5. device as described in claim 1, which is characterized in that two-stage dust removal device is set after the primary dust removing device,
Calcium hydroxide injection apparatus is set in connecting pipe.
6. device as described in claim 1, which is characterized in that the wet process reaction tower is arranged in the selective catalytic denitrification process device
Before.
7. device as described in claim 1, which is characterized in that the wet process reaction tower and the selective catalytic denitrification process device
Part connecting pipe be set to the flue gas heater inside.
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| CN201821254062.5U CN209229753U (en) | 2018-08-03 | 2018-08-03 | A kind of incineration flue gas of household garbage purification device |
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| CN201821254062.5U CN209229753U (en) | 2018-08-03 | 2018-08-03 | A kind of incineration flue gas of household garbage purification device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113441028A (en) * | 2021-06-16 | 2021-09-28 | 南方科技大学 | Dioxin retardant injection device, hazardous waste treatment system and method |
-
2018
- 2018-08-03 CN CN201821254062.5U patent/CN209229753U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113441028A (en) * | 2021-06-16 | 2021-09-28 | 南方科技大学 | Dioxin retardant injection device, hazardous waste treatment system and method |
| CN113441028B (en) * | 2021-06-16 | 2023-09-26 | 南方科技大学 | Dioxin retarder injection device, hazardous waste treatment system and hazardous waste treatment method |
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