CN106753462A - One kind classification directional thermal decomposition sludge carbonization method - Google Patents
One kind classification directional thermal decomposition sludge carbonization method Download PDFInfo
- Publication number
- CN106753462A CN106753462A CN201611100751.6A CN201611100751A CN106753462A CN 106753462 A CN106753462 A CN 106753462A CN 201611100751 A CN201611100751 A CN 201611100751A CN 106753462 A CN106753462 A CN 106753462A
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- Prior art keywords
- sludge
- carbonization
- low temperature
- thermal decomposition
- heating
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses one kind classification directional thermal decomposition sludge carbonization method, comprise the following steps：(1) dehydrate：Sludge is through being dehydrated to the sludge that moisture content is 40%~60%；(2) low temperature is bakeed：The sludge dehydrated through step (1) carries out low temperature baking treatment at 200 DEG C~350 DEG C；(3) middle temperature carbonization：The solid product that step (2) low temperature baking treatment is obtained carries out middle temperature and is carbonized using heating using microwave to 500 DEG C~800 DEG C, obtains sludge carbon.The present invention carries out monoblock type heating by microwave to sludge, solve traditional heating mode come between material using heating driven by the temperature difference exchange heat there is a problem of heating in amplification process, in material it is uneven.
Description
Technical field：
The invention belongs to offal treatment and application technology as the second resource field, and in particular to one kind classification directional thermal decomposition sludge
Carbonization method.
Background technology：
With the raising of sewage treatment capacity, sludge quantity is also significantly increased.According to《At 2013-2017 China Treatment of Sludge
Depth investigation is put with the report of investment strategy planning application》, about 1.98 hundred million tons are up to the sludge annual production of China in 2015, turn into
Global maximum sludge produces state.Foreign countries' sludge treatment measure at present is mainly landfill, burning etc., wherein filling due to place limitation
Also gradually abandoned with potential safety hazard, burn due to there are problems that investment, operating cost higher, Environmental security and,
There is larger dispute always.In terms of economic development, the utilization of resources, the city ecological environment protection etc., recycling sludge
Using the preferable outlet that should be sludge treatment.
Chinese patent CN103908949A discloses a kind of sludge-based activated carbon and its production method and is given up containing chromium in plating
Application in water, it is characterized in that sludge is prepared from after drying, activation, microwave treatment, washing, baking step.Can be in plating
In chromate waste water treatment, active sludge carbon is used as adsorbent.It is auxiliary that Chinese patent ZL 201410349427.2 discloses a kind of microwave
The sludge that moisture content is 50~85wt% is first sent into hydrothermal reactor by the method for helping hydrothermal carbonization to prepare sludge carbon, the method
In, it is 2~3atm to control pressure in hydrothermal reactor, and heating-up temperature is 150 DEG C~300 DEG C, and Microwave-assisted firing carries out hydro-thermal
30~150min of carburizing reagent, obtains hydrothermal carbonization liquid.Then the hydrothermal carbonization liquid that will be obtained carries out separation of solid and liquid, solid product
Washing, 40 DEG C~60 DEG C dryings, obtain sludge carbon.Chinese patent CN104355519A discloses fast based on hydrothermal carbonization and microwave
The Method for comprehensive treatment of sludge of speed heat solution, including sludge hydrothermal carbonization and the big step of microwave fast pyrogenation two.Hydrothermal carbonization is used for
Sludge early stage is pre-processed, and can solve the difficult point of sludge high-moisture low heat value, and the energy grade of sludge is improved on source；Pass through
The reacted sludge carbon of hydrothermal carbonization is carried out into microwave fast pyrogenation, the liquid fuel and fuel gas of preferable yield is obtained, Gu
Body residual coke can be used for the raw material of industry, so as to realize that sludge high-efficiency low-pollution energy resourcesization are disposed.
Above-mentioned patent all refers to enter the heating that the later intermediate product of processing is carried out to sludge or to sludge using microwave,
But contain more moisture in handled material.Patent CN104355519A is related to using method of fractional steps treatment sludge, but
Substantial amounts of water soluble contaminants can be produced during hydrothermal carbonization, the sewage produced in processing procedure is difficult to process.While hydro-thermal
Preparation-obtained solid product contains more water, is unfavorable for that microwave fast pyrogenation prepares solid charcoal.
The content of the invention：
It is an object of the invention to provide one kind classification directional thermal decomposition sludge carbonization method, the present invention is by microwave to sludge
Monoblock type heating is carried out, traditional heating mode is solved and is come from using heating heat exchange is driven amplified by the temperature difference between material
Cheng Zhong, has that heating is uneven in material.
It is an object of the invention to provide one kind classification directional thermal decomposition sludge carbonization method, comprise the following steps：
(1) dehydrate：Sludge is through being dehydrated to the sludge that moisture content is 40%~60%；
(2) low temperature is bakeed：The sludge dehydrated through step (1) carries out low temperature baking treatment at 200 DEG C~350 DEG C；
(3) middle temperature carbonization：By step (2) low temperature baking solid product for obtaining for the treatment of using heating using microwave to 500 DEG C~
800 DEG C carry out middle temperature carbonization, obtain sludge carbon.
The present invention will in sludge under the high temperature conditions the easily organic matter of generation micro-molecular gas and liquid in low temperature and more long
Baking pretreatment is carried out under the conditions of reaction time, aromatisation and charing is carried out by slow polycondensation reaction, at low temperature baking
The organic matter polycondensation in sludge can be made to be crosslinked charing phenomenon after reason, the yield of solution solid carbon is warmed in can increasing.
Process the solid product that obtains by low temperature baking carries out pyrolysis carbonization to 500 DEG C~800 DEG C using heating using microwave
And collaboration pore-creating, bakeed by low temperature and the combined treatment of the middle temperature carbonization of microwave can improve sludge carbon yield and specific surface area.
Preferably, to the oxygen that iron or magnesium are added in dry sludge to be drained off during dehydrating described in step (1)
Compound.By adding magnesia, the sludge carbon for preparing of the invention can be improved as electrode material or the spy of deodoring materials
Property.
Preferably, the low temperature described in step (2) bakees the time for 1~3h.
Preferably, the middle temperature carbonization time described in step (3) is 0.5~1h.
Preferably, produced product produces flue gas, the cigarette by burner combustion after being carbonized through middle temperature in step (3)
The baking thermal source that gas is bakeed as step (2) low temperature.
The beneficial effects of the invention are as follows：
1st, the technology that the present invention is provided carries out monoblock type heating by microwave to sludge, solves traditional heating mode utilization
Heating drives heat exchange to there is a problem of that heating is uneven in amplification process, in material between coming from material by the temperature difference；
2nd, the present invention provide technology due to using monoblock type heating, while being conducive in sludge by adding modified material
Promote the formation of sludge carbon mesopore in carbon production process, the sludge carbon for being produced has the specific surface area for increasing, sludge carbon materialization
Property is preferable.
Brief description of the drawings：
Fig. 1 is present invention classification directional thermal decomposition sludge Carbonation process figure.
Specific embodiment：
Following examples are further illustrated to of the invention, rather than limitation of the present invention.
Except special instruction, experiment material and reagent in the present invention are the art routine commercial products.
Refering to Fig. 1：One kind classification directional thermal decomposition sludge carbonization method, comprises the following steps：
(1) dehydrate：Sludge is through being dehydrated to the sludge that moisture content is 40%~60%；
(2) low temperature is bakeed：The sludge dehydrated through step (1) carried out at 200 DEG C~350 DEG C low temperature bakee treatment 1~
3h；
(3) middle temperature carbonization：By step (2) low temperature baking solid product for obtaining for the treatment of using heating using microwave to 500 DEG C~
800 DEG C carry out 0.5~1h of middle temperature carbonization, obtain sludge carbon.
Embodiment 1
One kind classification directional thermal decomposition sludge carbonization method, comprises the following steps：
(1) dehydrate：Sludge is through being dehydrated to the sludge that moisture content is 40%~60%；
(2) low temperature is bakeed：The sludge dehydrated through step (1) carries out low temperature at 200 DEG C and bakees treatment 1h；
(3) middle temperature carbonization：Step (2) low temperature baking solid product for obtaining for the treatment of is entered to 500 DEG C using heating using microwave
The middle temperature carbonization 0.5h of row, obtains sludge carbon.
Sludge dewatering is dried it and can be realized from sludge dewatering equipment or mechanical dehydration device in step (1).Step
Suddenly the liquid and gaseous product produced by the middle temperature carbonization of (3) microwave produce high-temperature flue gas, high-temperature flue gas to lead to by burner combustion
Cross low temperature and bakee reactor as thermal source is bakeed, be capable of achieving the recycling of the energy, it is to avoid energy waste.
Sludge carbon ratio surface area produced by this example is 79.41m2/ g, carbon content 17.75%.
Embodiment 2
One kind classification directional thermal decomposition sludge carbonization method, comprises the following steps：
(1) dehydrate：Sludge is through being dehydrated to the sludge that moisture content is 40%~60%；
(2) low temperature is bakeed：The sludge dehydrated through step (1) carries out low temperature at 300 DEG C and bakees treatment 2h；
(3) middle temperature carbonization：Step (2) low temperature baking solid product for obtaining for the treatment of is entered to 600 DEG C using heating using microwave
The middle temperature carbonization 0.8h of row, obtains sludge carbon.
Sludge carbon ratio surface area produced by this example is 51.36m2/ g, carbon content 16.75%.
Embodiment 3
One kind classification directional thermal decomposition sludge carbonization method, comprises the following steps：
(1) dehydrate：Sludge is through being dehydrated to the sludge that moisture content is 40%~60%；
(2) low temperature is bakeed：The sludge dehydrated through step (1) carries out low temperature at 350 DEG C and bakees treatment 3h；
(3) middle temperature carbonization：Step (2) low temperature baking solid product for obtaining for the treatment of is entered to 800 DEG C using heating using microwave
The middle temperature carbonization 1h of row, obtains sludge carbon.
Sludge carbon ratio surface area produced by this example is 49.32m2/ g, carbon content 17.02%.
The sludge carbon that classification directional thermal decomposition sludge carbonization method proposed by the present invention is produced is obtained sludge with prior art
Carbon phase is contrasted, and the sludge carbon that the present invention is obtained has the specific surface area for increasing, and sludge carbon physico-chemical property is more preferable, the carbon content for obtaining
Sludge carbon its specific surface area maximum higher, wherein being obtained under the process conditions of embodiment 1, carbon content highest.
The classification directional thermal decomposition sludge carbonization method that the present invention is provided is described in detail above, above example
Explanation be only intended to help and understand technical scheme and its core concept, it is noted that for the art
For technical staff, under the premise without departing from the principles of the invention, some improvement and modification can also be carried out to the present invention, these
Improve and modification is also fallen into the protection domain of the claims in the present invention.
Claims (5)
1. it is a kind of to be classified directional thermal decomposition sludge carbonization method, it is characterised in that to comprise the following steps：
(1) dehydrate：Sludge is through being dehydrated to the sludge that moisture content is 40%~60%；
(2) low temperature is bakeed：The sludge dehydrated through step (1) carries out low temperature baking treatment at 200 DEG C~350 DEG C；
(3) middle temperature carbonization：The solid product that step (2) low temperature baking treatment is obtained is using heating using microwave to 500 DEG C~800 DEG C
Middle temperature carbonization is carried out, sludge carbon is obtained.
It is 2. according to claim 1 to be classified directional thermal decomposition sludge carbonization method, it is characterised in that：It is de- described in step (1)
To the oxide that iron or magnesium are added in dry sludge to be drained off in water drying process.
It is 3. according to claim 1 and 2 to be classified directional thermal decomposition sludge carbonization method, it is characterised in that：Described in step (2)
Low temperature bakee the time be 1~3h.
4. the classification directional thermal decomposition sludge carbonization method described in a kind of claim 1 or 2, it is characterised in that：Described in step (3)
Middle temperature carbonization time be 0.5~1h.
5. the classification directional thermal decomposition sludge carbonization method described in a kind of claim 1 or 2, it is characterised in that：In step (3) in warp
Produced product produces flue gas, the baking that the flue gas is bakeed as step (2) low temperature by burner combustion after temperature carbonization
Thermal source.
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| CN201611100751.6A CN106753462A (en) | 2016-12-05 | 2016-12-05 | One kind classification directional thermal decomposition sludge carbonization method |
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| CN201611100751.6A CN106753462A (en) | 2016-12-05 | 2016-12-05 | One kind classification directional thermal decomposition sludge carbonization method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108975305A (en) * | 2018-08-20 | 2018-12-11 | 宁夏和兴碳基材料有限公司 | A method of carbon-based material is prepared using dewatered sludge |
| CN109517972A (en) * | 2018-11-14 | 2019-03-26 | 河南工学院 | A kind of microwave high-temperature roasting quantitative reduction method of nickel-containing sludge |
| CN110616077A (en) * | 2019-10-18 | 2019-12-27 | 南京理工大学 | Method and device for preparing high-yield coke by combined baking-carbonization |
| CN111377579A (en) * | 2018-12-29 | 2020-07-07 | 中国石油化工股份有限公司 | Oil sludge treatment method |
| CN112358148A (en) * | 2020-11-04 | 2021-02-12 | 昆明理工大学 | Resourceful treatment method for domestic sludge |
| CN112811782A (en) * | 2020-12-31 | 2021-05-18 | 上海源绿水务科技有限公司 | Method for carbonizing and treating sludge by microwave heating |
| CN114044620A (en) * | 2021-11-05 | 2022-02-15 | 同济大学 | Method for preparing sludge conditioner by using water supply sludge and application thereof |
| CN114854467A (en) * | 2022-05-06 | 2022-08-05 | 河南城建学院 | Device for preparing solid fuel by blending sludge and wood fiber wastes and performing hydrothermal carbonization |
| CN115007619A (en) * | 2022-05-20 | 2022-09-06 | 西安热工研究院有限公司 | System for treating urban kitchen waste by steam of steam turbine |
| CN116062941A (en) * | 2023-03-02 | 2023-05-05 | 北京神舟茂华环保科技有限公司 | Synergistic defluorination and dechlorination method for high-fluorine-content chlorine-containing wastewater in photovoltaic industry |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108975305A (en) * | 2018-08-20 | 2018-12-11 | 宁夏和兴碳基材料有限公司 | A method of carbon-based material is prepared using dewatered sludge |
| CN109517972B (en) * | 2018-11-14 | 2020-09-04 | 河南工学院 | Microwave high-temperature roasting reduction method for nickel-containing sludge |
| CN109517972A (en) * | 2018-11-14 | 2019-03-26 | 河南工学院 | A kind of microwave high-temperature roasting quantitative reduction method of nickel-containing sludge |
| CN111377579B (en) * | 2018-12-29 | 2022-02-08 | 中国石油化工股份有限公司 | Oil sludge treatment method |
| CN111377579A (en) * | 2018-12-29 | 2020-07-07 | 中国石油化工股份有限公司 | Oil sludge treatment method |
| CN110616077B (en) * | 2019-10-18 | 2021-11-09 | 南京理工大学 | Method and device for preparing high-yield coke by combined baking-carbonization |
| CN110616077A (en) * | 2019-10-18 | 2019-12-27 | 南京理工大学 | Method and device for preparing high-yield coke by combined baking-carbonization |
| CN112358148A (en) * | 2020-11-04 | 2021-02-12 | 昆明理工大学 | Resourceful treatment method for domestic sludge |
| CN112811782A (en) * | 2020-12-31 | 2021-05-18 | 上海源绿水务科技有限公司 | Method for carbonizing and treating sludge by microwave heating |
| CN114044620A (en) * | 2021-11-05 | 2022-02-15 | 同济大学 | Method for preparing sludge conditioner by using water supply sludge and application thereof |
| WO2023077882A1 (en) * | 2021-11-05 | 2023-05-11 | 同济大学 | Method for preparing sludge conditioner from water supply sludge and application of sludge conditioner |
| CN114854467A (en) * | 2022-05-06 | 2022-08-05 | 河南城建学院 | Device for preparing solid fuel by blending sludge and wood fiber wastes and performing hydrothermal carbonization |
| CN114854467B (en) * | 2022-05-06 | 2023-02-24 | 河南城建学院 | Device for preparing solid fuel by blending sludge and wood fiber wastes and performing hydrothermal carbonization |
| CN115007619A (en) * | 2022-05-20 | 2022-09-06 | 西安热工研究院有限公司 | System for treating urban kitchen waste by steam of steam turbine |
| CN116062941A (en) * | 2023-03-02 | 2023-05-05 | 北京神舟茂华环保科技有限公司 | Synergistic defluorination and dechlorination method for high-fluorine-content chlorine-containing wastewater in photovoltaic industry |
| CN116062941B (en) * | 2023-03-02 | 2023-09-08 | 北京神舟茂华环保科技有限公司 | Synergistic defluorination and dechlorination method for high-fluorine-content chlorine-containing wastewater in photovoltaic industry |
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Application publication date: 20170531 |