CN111807671A - Sludge incineration and carbonization cooperative treatment system - Google Patents

Sludge incineration and carbonization cooperative treatment system Download PDF

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Publication number
CN111807671A
CN111807671A CN202010544857.5A CN202010544857A CN111807671A CN 111807671 A CN111807671 A CN 111807671A CN 202010544857 A CN202010544857 A CN 202010544857A CN 111807671 A CN111807671 A CN 111807671A
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China
Prior art keywords
sludge
carbonization
incineration
flue gas
inlet
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CN202010544857.5A
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胡维杰
邱凤翔
卢骏营
金则陈
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Shanghai Municipal Engineering Design Insitute Group Co Ltd
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Shanghai Municipal Engineering Design Insitute Group Co Ltd
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Priority to CN202010544857.5A priority Critical patent/CN111807671A/en
Publication of CN111807671A publication Critical patent/CN111807671A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/13Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D50/00Combinations of methods or devices for separating particles from gases or vapours
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/001Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/60Heavy metals or heavy metal compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/10Energy recovery

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Hydrology & Water Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Engineering & Computer Science (AREA)
  • Treatment Of Sludge (AREA)

Abstract

A system for sludge incineration and carbonization cooperative treatment is characterized in that a sludge drying device dries sludge; the sludge dried by the sludge drier enters the incinerator from a sludge inlet through a sludge conveying and feeding device, the auxiliary fuel inlet is used for adding auxiliary fuel, air enters the incinerator through an air inlet and is incinerated with the sludge, and smoke generated by incineration is discharged from an air outlet; the sludge dried by the sludge drier enters a carbonization furnace for carbonization, high-temperature flue gas enters a jacket of the carbonization furnace to heat the carbonization furnace, and high-temperature combustible gas and combustible liquid generated by pyrolysis of the carbonization furnace return to an incinerator through a wind inlet for incineration; the air outlet of the waste heat boiler and the flue gas outlet of the sludge carbonization furnace jacket are connected with a flue gas treatment device, and are discharged from a chimney by a draught fan after being treated by the flue gas treatment device. The invention can expand the application path of sludge heat treatment products and simplify the treatment link of carbonized hot flue gas by the sludge incineration and carbonization cooperative treatment.

Description

Sludge incineration and carbonization cooperative treatment system
Technical Field
The invention relates to a sludge incineration and carbonization cooperative treatment system, and belongs to the field of solid waste treatment.
Background
In recent years, with the rapid development of Chinese economy and the acceleration of urbanization process, the treatment amount of municipal sewage and the corresponding sludge amount in China are rapidly increased. Meanwhile, with the development of economy to a higher level and the continuous improvement of the living standard of people, the requirement on environmental protection is higher and higher, the situation of heavy water and light mud is greatly changed in the past, and the requirement on sludge treatment is higher and higher.
The heat treatment process mainly using sludge incineration has the advantages of killing virus, eliminating harmful organic matters, completely reducing volume and the like, has gradually become the main stream of sludge treatment in recent years, and is more and more popular at home and abroad. At present, sludge drying and incineration is one of the mainstream sludge treatment modes in China.
Sludge incineration generally adopts a bubbling fluidized bed, ash generated after incineration mainly comprises slag of an incinerator, pre-dedusting fly ash, fly ash of a bag-type dust remover and the like, and can be used for building material utilization such as brick making, roadbed stones and the like, but the resource utilization approach of the ash generated by the sludge incineration technology is limited, and most of the ash is still disposed by adopting a landfill mode at present. With the improvement of people's knowledge of sludge incineration technical routes, more and more cities choose sludge incineration treatment routes. Under the condition of increasing environmental protection requirements, a plurality of cities adopt a technical route of dispersed drying and centralized incineration, and the dried sludge is transported to a sludge incineration facility for incineration to generate redundant heat energy which needs to be utilized.
The carbonized products obtained by the sludge carbonization technology have relatively wide application, including land utilization, building material utilization, fuel utilization and the like. The carbonized and stabilized mixture can be stored for a long period of time, and can be used as deodorizing materials, decolorizing agents, dehydration aids, soil improving materials, fertilizers, snow melting agents, fuels and the like, and has great advantages in resource utilization. However, in the aspect of energy utilization, the carbonization needs to be supplemented with larger energy from the outside, and the energy consumption for operation is relatively high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a sludge incineration and carbonization cooperative treatment system, which utilizes incineration heat to provide energy for carbonization and can expand sludge resource utilization ways.
In order to achieve the purpose, the technical scheme of the invention is as follows: a system for sludge incineration and carbonization cooperative treatment comprises a sludge drying device, a sludge incineration device, a sludge carbonization device and a flue gas treatment device, and is characterized in that the sludge drying device comprises a sludge drier and is used for drying sludge;
the sludge incineration device comprises an incinerator, the incinerator is provided with an auxiliary fuel inlet, a sludge inlet, an air inlet and an air outlet, the sludge inlet is connected with a sludge outlet of the sludge drying device, sludge dried by the sludge drying machine enters the incinerator from the sludge inlet through a sludge conveying and feeding device, the auxiliary fuel inlet is used for adding auxiliary fuel, air enters the incinerator through the air inlet and is incinerated with the sludge, and smoke generated by incineration is discharged from the air outlet;
the sludge carbonization device comprises a sludge carbonization furnace, the sludge carbonization furnace is provided with a sludge inlet, a carbonization product outlet and a high-temperature combustible gas outlet, the sludge inlet is connected with the sludge outlet of the sludge drying device, the high-temperature combustible gas outlet is connected with an air inlet of the incinerator, a jacket is arranged on the outer side of the carbonization furnace, the jacket is provided with a high-temperature gas inlet and a flue gas outlet, the high-temperature gas inlet is connected with an air outlet of the incinerator, the sludge dried by the sludge drying machine enters the carbonization furnace for carbonization, the high-temperature flue gas enters the jacket of the carbonization furnace for heating the carbonization furnace, and the high-temperature combustible gas and the combustible liquid generated by pyrolysis of the carbonization furnace return to the incinerator for incineration through the air inlet;
the flue gas treatment device comprises an electrostatic dust collector, a bag-type dust collector and a wet deacidification tower which are connected in sequence; the air outlet of the waste heat boiler and the flue gas outlet of the sludge carbonization furnace jacket are connected with a flue gas treatment device, and are discharged from a chimney by a draught fan after being treated by the flue gas treatment device.
Preferably, the system still includes exhaust-heat boiler, burn the air outlet of burning furnace and be connected with exhaust-heat boiler, burn the income wind gap of burning furnace and be connected with the air heater who sets up in exhaust-heat boiler, improve the temperature of going into the stove air through air heater, improve the condition of catching fire, improve the firing temperature, increase incineration stability.
Preferably, the waste heat boiler is connected with the sludge drying machine, the dehydrated sludge is dried by steam generated by the waste heat boiler, the heat released by the sludge is fully utilized, and the requirement on external energy is reduced.
Preferably, the air outlet of the incinerator is connected with the high-temperature gas inlet of the carbonization furnace jacket through a cyclone dust collector and a high-temperature filter, and the high-temperature flue gas is subjected to cyclone dust collection and filtration before entering the carbonization furnace to remove most of dust in the flue gas.
Preferably, the carbonization furnace is provided with a steam soot blower for periodically blowing the fly ash enriched in the jacket so as to keep the heat exchange efficiency of the flue gas.
Preferably, a granulating or slitting device is arranged in front of a sludge inlet of the sludge carbonization furnace.
Preferably, the high-temperature filter is a high-temperature dust filter.
Preferably, the sludge drying machine is connected with the wet sludge receiving bin through a sludge pump, and is used for drying the sludge pumped from the wet sludge receiving bin to the sludge drying machine.
Preferably, the air inlets of the incinerator comprise a primary air inlet and a secondary air inlet, and the temperature of air entering the incinerator, the temperature of a hearth and the like can be adjusted.
Preferably, the combustible gas generated by carbonization and pyrolysis directly enters an incinerator for incineration, so that the treatment link of carbonization and pyrolysis gas is simplified, the sludge heat value is fully utilized, meanwhile, the combustible liquid generated by carbonization and pyrolysis directly enters the incinerator for incineration along with the pyrolysis gas at high temperature, the treatment link of carbonization and pyrolysis products is simplified, and the sludge heat value is fully utilized. The flue gas treatment system removes dust, acid gas, heavy metal and the like in the flue gas, and the flue gas is discharged after reaching the standard. And simultaneously, the hot flue gas entering the carbonization furnace is subjected to temperature reduction and then is merged into a flue gas treatment system for treatment, and the flue gas is discharged after reaching the standard.
The invention can expand the application approach of sludge heat treatment products by the sludge incineration and carbonization cooperative treatment, can fully utilize the heat of the sludge to carry out carbonization, simplifies the treatment links of carbonization pyrolysis gas and liquid products, and simplifies the treatment link of carbonization hot flue gas.
Drawings
FIG. 1 is a process flow diagram of sludge incineration and carbonization cooperative treatment technology;
the figure includes: the system comprises a wet sludge receiving bin 1, a sludge drier 2, a sludge incinerator 3, an auxiliary fuel inlet 4, a sludge inlet 5, a secondary air inlet 6, a primary air inlet 7, a sludge carbonization furnace 8, a carbonized product storage bin 9, an air preheater 10, a waste heat boiler 11, an electrostatic dust collector 12, a bag-type dust collector 13, a wet deacidification tower 14, a spray 15, an induced draft fan 16, a chimney 17, a cyclone dust collector 18 and a high-temperature filter 19.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described below with reference to the accompanying drawings.
As shown in fig. 1, a system for sludge incineration and carbonization cooperative treatment comprises: the system comprises a wet sludge receiving bin 1, a sludge drier 2, a sludge incinerator 3, an auxiliary fuel inlet 4, a sludge inlet 5, a secondary air inlet 6, a primary air inlet 7, a sludge carbonization furnace 8, a carbonized product storage bin 9, an air preheater 10, a waste heat boiler 11, an electrostatic dust collector 12, a bag-type dust collector 13, a wet deacidification tower 14, a spray 15, an induced draft fan 16, a chimney 17, a cyclone dust collector 18 and a high-temperature filter 19.
A system for sludge incineration and carbonization cooperative treatment comprises a sludge drying device, a sludge incineration device, a sludge carbonization device and a flue gas treatment device, and is characterized in that the sludge drying device comprises a sludge drier 2 for drying sludge;
the sludge incineration device comprises a sludge incinerator 3, the sludge incinerator 3 is provided with an auxiliary fuel inlet 4, a sludge inlet 5, an air inlet and an air outlet, the sludge inlet 6 is connected with a sludge outlet of the sludge drier 2, sludge dried by the sludge drier enters the incinerator from the sludge inlet through a sludge conveying and feeding device, the auxiliary fuel inlet is used for adding auxiliary fuel, air enters the incinerator through the air inlet and is incinerated with the sludge, and smoke generated by incineration is discharged from the air outlet;
the sludge carbonization device includes sludge carbonization stove 8, sludge carbonization stove 8 is equipped with sludge inlet, carbonization product export, high temperature combustible gas export, sludge inlet and sludge drying machine 2's sludge outlet connection, high temperature combustible gas export is connected with the income wind gap of burning furnace, the carbonization stove outside is equipped with presss from both sides the cover, it is equipped with high temperature gas entry and exhanst gas outlet to press from both sides the cover, the high temperature gas entry is connected with the air outlet of burning furnace, and mud after the drying of sludge drying machine mummification gets into carbonization stove carbonization, and the cover that high temperature flue gas got into the carbonization stove heats the carbonization stove, and high temperature combustible gas and the combustible liquid that the carbonization stove pyrolysis produced return to burning furnace through going into the wind gap and burn.
After being received by the wet sludge receiving bin 1, the external wet sludge is pumped to a sludge drier 2 for drying so as to reduce the water content of the sludge, and the steam generated by the waste heat boiler 11 is a steam source of the drier; the dried sludge enters an incinerator through a sludge inlet 5, and the sludge and auxiliary fuel are directly mixed and combusted in the incinerator; air is heated by an air preheater 10 and then enters the incinerator 3 through a primary air inlet 7 and a secondary air inlet 6 for incineration; the smoke generated by incineration generates steam through a waste heat boiler 11 and then is supplied to a drier 2 to dry wet sludge; the flue gas passes through an electrostatic dust collector 12, a bag-type dust collector 13 and a deacidification tower 14 and then is guided into a chimney 17 by a draught fan; the dried sludge enters a carbonization furnace 8 for carbonization, and the high-temperature flue gas enters a jacket of the carbonization furnace 8 for heating after being dedusted by a cyclone deduster 18 and a high-temperature filter 19; the carbonization furnace 8 is provided with a steam soot blower for periodically blowing the fly ash enriched in the jacket; high-temperature combustible gas (containing combustible liquid) generated by pyrolysis of the carbonization furnace 8 returns to the incinerator 3 through the primary air inlet 7 and the secondary air inlet 6 for incineration; cooling the carbonized product generated by the carbonization furnace 8, and then entering a storage bin 9 for storage and outward transportation; the utilized flue gas is merged into a flue gas treatment system for treatment.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (9)

1. The utility model provides a system for sludge incineration and carbonization coprocessing, includes sludge drying device, sludge incineration device, sludge carbonization device, flue gas processing apparatus, its characterized in that:
the sludge drying device comprises a sludge drying machine and is used for drying sludge;
the sludge incineration device comprises an incinerator, the incinerator is provided with an auxiliary fuel inlet, a sludge inlet, an air inlet and an air outlet, the sludge inlet is connected with a sludge outlet of the sludge drying device, sludge dried by the sludge drying machine enters the incinerator from the sludge inlet through a sludge conveying and feeding device, the auxiliary fuel inlet is used for adding auxiliary fuel, air enters the incinerator through the air inlet and is incinerated with the sludge, and smoke generated by incineration is discharged from the air outlet;
the sludge carbonization device comprises a sludge carbonization furnace, the sludge carbonization furnace is provided with a sludge inlet, a carbonization product outlet, a high-temperature combustible gas outlet, a high-temperature flue gas inlet and a tail gas outlet, the sludge inlet is connected with the sludge outlet of the sludge drying device, the high-temperature combustible gas outlet is connected with an air inlet of the incinerator, a jacket is arranged on the outer side of the carbonization furnace, the jacket is provided with the high-temperature gas inlet and the flue gas outlet, the high-temperature gas inlet is connected with an air outlet of the incinerator, the sludge dried by the sludge drying machine enters the carbonization furnace for carbonization, the high-temperature flue gas generated by incineration of the incinerator enters the jacket of the carbonization furnace for heating the carbonization furnace, and the high-temperature combustible gas and the combustible liquid generated by pyrolysis of the carbonization furnace return;
the flue gas treatment device comprises an electrostatic dust collector, a bag-type dust collector and a wet deacidification tower which are connected in sequence; the air outlet of the waste heat boiler and the flue gas outlet of the sludge carbonization furnace jacket are connected with a flue gas treatment device, and are discharged from a chimney by a draught fan after being treated by the flue gas treatment device.
2. The system according to claim 1, wherein the system further comprises a waste heat boiler, the air outlet of the incinerator is connected to the waste heat boiler, the air inlet of the incinerator is connected to an air preheater disposed in the waste heat boiler, and the air preheater is used to increase the temperature of air entering the incinerator, thereby improving the ignition condition, increasing the incineration temperature, and increasing the incineration stability.
3. The system for sludge incineration and carbonization co-treatment as claimed in claim 2, wherein the exhaust-heat boiler is connected with a sludge drying machine, and the steam generated by the exhaust-heat boiler is used for drying the dewatered sludge, so as to fully utilize the heat released by the sludge and reduce the demand on external energy.
4. The system for sludge incineration and carbonization co-treatment as claimed in claim 1, wherein the high temperature flue gas generated by sludge incineration in step S4 is used to provide a heat source for sludge carbonization.
5. The system according to claim 1, wherein a part of the high temperature flue gas generated by the incinerator is connected to the high temperature gas inlet of the jacket of the carbonization furnace through the cyclone dust collector and the high temperature filter via the air outlet, and the high temperature flue gas is cyclone-dedusted and filtered before entering the carbonization furnace to remove most of the dust in the flue gas.
6. The system for sludge incineration and carbonization co-treatment as claimed in claim 1, wherein the carbonization furnace is provided with a steam soot blower, steam is from a waste heat boiler, and fly ash enriched in the jacket is periodically purged to keep the jacket clean and the heat exchange efficiency of flue gas.
7. The system for sludge incineration and carbonization co-treatment as claimed in claim 1, wherein a granulating or slitting device is provided before the inlet of the carbonization device.
8. The system for sludge incineration and carbonization co-treatment as claimed in claim 5, wherein the high temperature filter is a high temperature dust filter.
9. The system for sludge incineration and carbonization co-treatment as claimed in claim 1, wherein the sludge drying machine is connected with the wet sludge receiving bin through a sludge pump, and is used for drying the sludge pumped from the wet sludge receiving bin to the sludge drying machine.
CN202010544857.5A 2020-06-15 2020-06-15 Sludge incineration and carbonization cooperative treatment system Pending CN111807671A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113464945A (en) * 2021-07-14 2021-10-01 安徽科达洁能股份有限公司 Low-carbon raw material decarburization treatment system and treatment method thereof
CN114165789A (en) * 2021-11-24 2022-03-11 中国环境科学研究院 Solar cell panel pyrolysis and waste gas treatment and resource utilization method thereof
CN116854319A (en) * 2023-05-29 2023-10-10 山东驰盛新能源设备有限公司 Sludge treatment method and treatment device thereof

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Publication number Priority date Publication date Assignee Title
US4913064A (en) * 1988-02-03 1990-04-03 Man Gutehoffnungshuette Gmbh Device for incinerating waste material
CN104033911A (en) * 2014-06-30 2014-09-10 南京德邦金属装备工程股份有限公司 Sludge drying and incinerating system
CN104876414A (en) * 2015-06-09 2015-09-02 湖州宜可欧环保科技有限公司 Method and device for pyrolytic carbonizing treatment of sludge
CN204874234U (en) * 2015-06-09 2015-12-16 湖州宜可欧环保科技有限公司 Mud pyrolysis and carbonization processing apparatus
CN105399304A (en) * 2015-12-25 2016-03-16 柳建国 Biological sludge drying and incineration cycle-treatment method and complete equipment
CN105948459A (en) * 2016-05-19 2016-09-21 山东齐盛机电工程有限公司 Method using drying and incineration to treat sludge
CN107497831A (en) * 2017-09-12 2017-12-22 李新方 A kind of its recovery method as resource of domestic waste sorting and charing integrated treatment
CN110285430A (en) * 2019-06-26 2019-09-27 世纪华扬环境工程有限公司 A kind of small-scale municipal sludge and house refuse cooperate with incineration treatment method
CN110846056A (en) * 2019-11-18 2020-02-28 武汉齐宇天下环境科技有限公司 Sludge carbonization cooperative technology complete equipment

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Publication number Priority date Publication date Assignee Title
US4913064A (en) * 1988-02-03 1990-04-03 Man Gutehoffnungshuette Gmbh Device for incinerating waste material
CN104033911A (en) * 2014-06-30 2014-09-10 南京德邦金属装备工程股份有限公司 Sludge drying and incinerating system
CN104876414A (en) * 2015-06-09 2015-09-02 湖州宜可欧环保科技有限公司 Method and device for pyrolytic carbonizing treatment of sludge
CN204874234U (en) * 2015-06-09 2015-12-16 湖州宜可欧环保科技有限公司 Mud pyrolysis and carbonization processing apparatus
CN105399304A (en) * 2015-12-25 2016-03-16 柳建国 Biological sludge drying and incineration cycle-treatment method and complete equipment
CN105948459A (en) * 2016-05-19 2016-09-21 山东齐盛机电工程有限公司 Method using drying and incineration to treat sludge
CN107497831A (en) * 2017-09-12 2017-12-22 李新方 A kind of its recovery method as resource of domestic waste sorting and charing integrated treatment
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CN110846056A (en) * 2019-11-18 2020-02-28 武汉齐宇天下环境科技有限公司 Sludge carbonization cooperative technology complete equipment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113464945A (en) * 2021-07-14 2021-10-01 安徽科达洁能股份有限公司 Low-carbon raw material decarburization treatment system and treatment method thereof
CN114165789A (en) * 2021-11-24 2022-03-11 中国环境科学研究院 Solar cell panel pyrolysis and waste gas treatment and resource utilization method thereof
CN116854319A (en) * 2023-05-29 2023-10-10 山东驰盛新能源设备有限公司 Sludge treatment method and treatment device thereof
CN116854319B (en) * 2023-05-29 2023-11-24 山东驰盛新能源设备有限公司 Sludge treatment method and treatment device thereof

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