CN107142118A - A kind of method that utilization sludge prepares sludge carbon-based material - Google Patents
A kind of method that utilization sludge prepares sludge carbon-based material Download PDFInfo
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- CN107142118A CN107142118A CN201710243468.7A CN201710243468A CN107142118A CN 107142118 A CN107142118 A CN 107142118A CN 201710243468 A CN201710243468 A CN 201710243468A CN 107142118 A CN107142118 A CN 107142118A
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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
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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
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
-
- 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
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/12—Applying additives during coking
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- 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)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of method that utilization sludge prepares sludge carbon-based material, comprise the following steps：Sludge is bakeed through low temperature to be obtained bakeing solid product and bakees gaseous product；Solid product, modifying agent will be bakeed to be well mixed with condensed light component, modifying agent is 2~5 with the mass ratio for bakeing solid product:1；Mixture is subjected to high temperature pyrolysis, pyrolysis solid product and pyrolysis gas product is obtained；Pyrolysis solid product is mixed with condensation heavy component；Obtained mixture progress forming and hardening will be pyrolyzed, obtains forming and hardening product；The forming and hardening product that forming and hardening is obtained activate obtaining sludge carbon-based material.Technology proposed by the present invention by pollution pyrolysis is produced produce during sludge carbon-based material gaseous product condense obtained heavy component and light components respectively as production process adhesive and dispersant use, usage amount of the sludge carbon-based material production process in auxiliary material is reduced, sludge carbon-based material production cost is reduced.
Description
Technical field：
The invention belongs to offal treatment and application technology as the second resource field, and in particular to one kind prepares sludge using sludge
The method of carbon-based material.
Background technology：
With the development and the raising of social enviroment protection level of urbanization, the yield of city sewage and sludge increases year by year.Sludge
Composition is complex, the aggregate that the organic matter and inorganic matter that the zoogloea formed by multiple-microorganism is adsorbed with it are constituted.
Sludge is a kind of rich carbon discarded object simultaneously, can be as the raw material for preparing carbon material, and carbonization technique is simple, sludge Carbon Materials system
Standby and application gains great popularity, the study hotspot utilized into recycling sludge.Pyrolyzing sludge can prepare carbonaceous material, it is possible to
Reduce solid volume, while enhancing is present in resistance of the heavy metal in charcoal base to precipitation naturally.And pyrolysis is produced not
Solidifying gas and pyrolysis oil have very high calorific value, and this can turn into potential fuel.Temperature used in pyrolysismethod is less than burning method, because
It is also less that this enters pollutant in pyrolysis gas.
The A of Chinese patent CN 102786967 disclose a kind of method that utilization sludge prepares biological carbon, and it is using sludge as original
Material, sludge is positioned in closed reactor, under high temperature, oxygen free condition, life is made after high temperature pyrolysis certain time in sludge
Thing carbon.The biological carbon prepared using this method, is recycled the nutritive salt such as the carbon containing higher concentration, nitrogen, phosphorus, potassium in sludge,
Sludge is set to carry out recycling while minimizing.Chinese patent ZL201410170177.6 discloses a kind of sludge base and lived
Property charcoal and its production method and the application in waste electroplating liquor containing chromium, sludge walks through drying, activation, microwave treatment, washing, drying
It is prepared from after rapid, can be in waste electroplating liquor containing chromium processing, active sludge carbon is used as adsorbent.Chinese patent ZL
201310112617.8 disclosing a kind of sludge high temperature carbonization system and carbonization technique, it comprises the following steps：1) will dehydration dirt
Mud is delivered in dewatered sludge drying machine；2) moisture percentage in sewage sludge is dropped to 30% by carbonization heating furnace supply hot gas, from dehydration
The hot gas of sludge drier discharge enters carbonization heating furnace burning deodorization after treatment；3) dewatered sludge is delivered to sludge
High temperature, anoxic treatment in carbide furnace by 600 DEG C~800 DEG C, form the institute that is carbonized in stable carbonized product, sludge carbide furnace
The carbonizing gas of generation export to carbonization heating furnace and carry out burning deodorization.
Above-mentioned patent all refers to sludge being converted into sludge carbon, activated carbon by mode of heating under anaerobic/anoxia condition
Deng carbon-based material.But above-mentioned patent is not directed to by rationally controlling sludge carbon-based material preparation process, by sludge heating process
The pyrolysis liquids of middle generation are back to use in sludge carbon-based material preparation process as dispersant/adhesive.
The content of the invention：
It is an object of the invention to provide a kind of method that utilization sludge prepares sludge carbon-based material, sludge carbon is which reduced
Sill production process reduces the environmental risk in sludge carbon-based material production cost and production process in the usage amount of auxiliary material,
Solve problems of the prior art.
It is an object of the invention to provide a kind of method that utilization sludge prepares sludge carbon-based material, comprise the following steps：
(1) bakee：Sludge is bakeed through low temperature to be obtained bakeing solid product and bakees gaseous product；
(2) mix：Solid product, modifying agent will be bakeed and be well mixed with the condensed light component that step (7) condensation is obtained,
Modifying agent is 2~5 with the mass ratio for bakeing solid product:1；
(3) it is pyrolyzed：The mixture that step (2) is obtained carries out high temperature pyrolysis, obtains pyrolysis solid product and pyrolysis gas
Product；
(4) mix：Solid product will be pyrolyzed and mixed with the condensation heavy component that step (7) condensation is obtained；
(5) forming and hardening：The mixture that step (4) is obtained carries out forming and hardening, obtains forming and hardening product；
(6) activate：The forming and hardening product that step (5) is obtained activate obtaining sludge carbon-based material；
(7) condense：The baking gaseous product of generation during step (1), step (3) and pyrolysis gas product are distinguished
Condensation separation is carried out, condensed light component, condensation heavy component, water and fixed gas are obtained, wherein bakeing gaseous product and pyrolysis
The condensation heavy component obtained after gaseous product condensation is used for step (4), bakees the condensed light obtained after gaseous product condensation
Component is used for step (2).
Bakee, the gaseous product that pyrolytic process is produced respectively obtains light components, heavy component and gas by condensation, gently
Matter component contains substantial amounts of water, organic acid, alcohol, ketone, sugar etc., and light components are in generally liquid, and density is smaller, and viscosity is low, is
The dispersant of good properties；Heavy component is in pitch shape, larger big of the degree of polymerization that organic cracking is produced mainly in sludge
Molecularly Imprinted Polymer, is excellent adhesive with higher density and viscosity；Gas is that uncondensable gas (does not coagulate
Gas), main component is CO, H2、CH4、CO2Deng gas heating value is generally in 10000~20000kJ/m3, baking process can be used as
Auxiliary fuel.
Preferably, described stoving temperature is 200 DEG C~350 DEG C, and the baking time is 2~6h.By the stoving temperature and
The baking time is completely dried sludge, while making the organic matter for easily generating micro-molecular gas and liquid in sludge under the high temperature conditions
Under the conditions of lower temperature and longer reaction time, aromatisation and charing are carried out by polycondensation reaction at a slow speed, generation compared with
For stable larger molecular organicses.
Preferably, described pyrolysis temperature is 500 DEG C~900 DEG C, and pyrolysis time is 0.5~2h.Bakee obtained solid
Product, bakee after the gaseous product that obtains after the obtained heavy component of the obtained condensed process of gaseous product and pyrolysis it is condensed
Heavy component that process is obtained uniformly after mixing under the conditions of the pyrolysis temperature and pyrolysis time fast pyrogenation.Make as adhesive
Hydrogeneous, oxy radical discharges rapidly the solid product that heavy component is obtained with baking at high temperature, and carbon-containing group stays in solid
Pyrolysis carbon backbone structure and pyrolytic carbon containing macroporous structure are formed in body product, and pyrolytic carbon is kept certain shape.
Preferably, described activation temperature is 600 DEG C~1000 DEG C, and soak time is 5~10h.Pass through the activation temperature
Forming and hardening product is set activate obtaining sludge carbon-based material with soak time.
Preferably, described modifying agent is in phosphoric acid, sulfuric acid, sodium hydroxide, potassium hydroxide, zinc chloride or potassium permanganate
More than one.The pH value of the light components obtained after condensation is generally between 2~4, in acidity, it is preferred that on modifying agent is
State both mixtures in the acid of proposition, salt.
Preferably, described moisture percentage in sewage sludge is 30%~80%.
Preferably, described fixed gas is produced as the flue gas that baking process provides thermal source by burning.
Preferably, the light components pH value that the baking condensed process of gaseous product is obtained is 2~4, pyrolysis gas product warp
The light components pH value that condensation process is obtained is 2~4.
Preferably, the condensed light component that the condensed process of pyrolysis gas product is obtained in step (3) is used for follow-up sludge
In the pyrolysis step for preparing sludge carbon-based material.
The beneficial effects of the invention are as follows：
1) generation gaseous product enters during the technology that the present invention is provided to pollution pyrolysis by producing sludge carbon-based material
The row obtained heavy component of condensation and light components respectively as production process adhesive and dispersant use, reduce dirt
Peat sill production process reduces sludge carbon-based material production cost in the usage amount of auxiliary material；
2) technology that the present invention is provided is due to using monoblock type heating, while being conducive to by adding modified material in sludge
Promote the formation of sludge carbon mesopore in carbon production process, the sludge carbon produced has larger specific surface area, sludge carbon materialization
Property is preferable.
Brief description of the drawings：
Fig. 1 is the process chart that sludge carbon-based material is prepared using sludge；
Fig. 2 is the process chart that the utilization sludge for having fixed gas recuperation of heat prepares sludge carbon-based material.
Embodiment：
Following examples are that the present invention is further illustrated, rather than limitation of the present invention.
Except special instruction, experiment material and reagent in the present invention are the conventional commercial products of the art.
Refering to Fig. 1 and Fig. 2：A kind of method that utilization sludge prepares sludge carbon-based material, comprises the following steps：
(1) bakee：Sludge is bakeed through low temperature to be obtained bakeing solid product and bakees gaseous product；
(2) mix：Solid product, modifying agent will be bakeed to be well mixed with condensed light component, modifying agent is with bakeing solid
The mass ratio of product is 2~5:1；
(3) it is pyrolyzed：The mixture that step (2) is obtained carries out high temperature pyrolysis, obtains pyrolysis solid product and pyrolysis gas
Product；
(4) mix：Pyrolysis solid product is mixed with condensation heavy component；
(5) forming and hardening：The mixture that step (4) is obtained carries out forming and hardening, obtains forming and hardening product；
(6) activate：The forming and hardening product that step (5) is obtained activate obtaining sludge carbon-based material；
The baking gaseous product and pyrolysis gas product of generation during step (1), step (3) are condensed respectively
Separation, obtains condensed light component, condensation heavy component, water and fixed gas, wherein bakeing gaseous product and pyrolysis gas product
The condensation heavy component obtained after condensation is used for step (4), and bakeing the condensed light component obtained after gaseous product condensation is used for
Step (2).
Embodiment 1
As shown in figure 1, a kind of method that utilization sludge prepares sludge carbon-based material, comprises the following steps：
(1) bakee：Sludge bakees 5h at 250 DEG C and obtains bakeing solid product and bakee gaseous product；
(2) mix：Solid product, phosphoric acid and condensed light component will be bakeed to be well mixed, phosphoric acid is with bakeing solid product
Mass ratio be 2:1；
(3) it is pyrolyzed：The mixture that step (2) is obtained is pyrolyzed 1h at 800 DEG C；
(4) mix：Pyrolysis solid product is mixed with condensation heavy component；
(5) forming and hardening：The mixture that step (4) is obtained carries out forming and hardening and obtains forming and hardening product；
(6) activate：The forming and hardening product that step (5) is obtained activates 6h at 900 DEG C and obtains sludge carbon-based material；
The gaseous product of generation during step (1), step (3) is subjected to condensation separation, obtain condensed light component,
Condense heavy component, water and fixed gas.Wherein bakee the condensation heavy group obtained after gaseous product and the condensation of pyrolysis gas product
Dividing is used for step (4), and bakeing the condensed light component obtained after gaseous product condensation is used in step (2).
The primary moisture percentage in sewage sludge used is completely dried sludge, while making in sludge in height for 30% by bakeing
Easily the organic matter of generation micro-molecular gas and liquid under the conditions of lower temperature and longer reaction time, passes through under the conditions of temperature
Polycondensation reaction at a slow speed carries out aromatisation and charing, generates relatively stable larger molecular organicses.
The gaseous product obtained after condensation heavy component that the condensed process of gaseous product obtained after baking is obtained, pyrolysis
The solid product that the condensation heavy component and baking that condensed process is obtained are obtained uniformly mixes aftershaping, then fast in high temperature
Speed heat solution.Hydrogeneous, oxy radical is fast at high temperature for the solid product that the heavy component and baking used as adhesive is obtained
Quick-release is put, and carbon-containing group stays in solid product pyrolysis carbon backbone structure and the pyrolytic carbon formed containing macroporous structure.Through overheat
The pyrolytic carbon carbon content prepared after solution is 16.97%, and specific surface area is 105.39m2/g。
Bakee, the light components that the gaseous product that pyrolytic process is produced is obtained by condensation contain substantial amounts of water, organic acid,
Alcohol, ketone, sugar etc., light components are in generally liquid, and density is smaller, and viscosity is low, is the dispersant of good properties；What condensation was obtained
Heavy component is in pitch shape, the larger macromolecule polyalcohol of the degree of polymerization that organic cracking is produced mainly in sludge, with compared with
High density and viscosity, is excellent adhesive.
The sludge carbon-based material carbon content prepared by activation step is 12.65%, and specific surface area is 280.82m2/g。
In the present embodiment, the pH value for the light components that condensation process is obtained is between 2.8~3.5, in acidity.By phosphorus
Acid is mixed with bakeing the light components that the obtained condensed process of gaseous product is obtained, and is then mixed with bakeing obtained solid product
Dipping is closed, sludge carbon modifying agent is impregnated into sludge carbon-based material.
Embodiment 2
As shown in Fig. 2 same as Example 1, difference is：
The moisture percentage in sewage sludge used is 40%, and stoving temperature is 200 DEG C, and the baking time is 2h；Modifying agent is permanganic acid
Potassium, addition is bakee solid product quality 3 times；Pyrolysis temperature is 500 DEG C, and pyrolysis time is 0.5h, and activation temperature is 600
DEG C, soak time is 5h.
The fixed gas that the condensed process of gaseous product of baking and pyrolytic process is obtained is produced as baking process by burning
The flue gas of thermal source is provided.
Embodiment 3
Same as Example 1, difference is：
The primary moisture percentage in sewage sludge used is 80%, and stoving temperature is 350 DEG C, and the baking time is 6h；Modifying agent is sulphur
The mixture of acid and zinc chloride, addition is bakees 3 times of solid product quality, and the wherein mass ratio of sulfuric acid and zinc chloride is 1:
1；Pyrolysis temperature is 900 DEG C, and pyrolysis time is 2h, and activation temperature is 1000 DEG C, and soak time is 10h.
Comparative example 1
Same as Example 1, difference is：
Sludge is directly pyrolyzed 1h carbon at 800 DEG C, 6h activation is then activated at 900 DEG C.Sludge can be produced during being somebody's turn to do
The water of raw material weight about 50%, 25% difficult cold oil, 10% fixed gas, 15% sludge carbon-based material.
Comparative example 2
Same as Example 1, difference is：
By sludge after 180 DEG C bakee 1.5h, modifying agent is potassium permanganate, and addition is baking solid product quality
1.5 again；Pyrolysis temperature is 450 DEG C, and pyrolysis time is 0.4h, and activation temperature is 500 DEG C, and soak time is 4h.
Comparative example 3
Same as Example 1, difference is：
By sludge after 380 DEG C bakee 6.5h, modifying agent is potassium permanganate, and addition is baking solid product quality
5.5 again；Pyrolysis temperature is 950 DEG C, and pyrolysis time is 2.5h, and activation temperature is 1050 DEG C, and soak time is 10.5h.
Compared with comparative example 1, the heavy component and light components that embodiment 1~3 is produced are fully used, and are realized
The energy makes full use of.The technology that the present invention is provided to pollution pyrolysis by producing the gas produced during sludge carbon-based material
Product carry out condense obtained heavy component and light components respectively as production process adhesive and dispersant use, drop
Low usage amount of the sludge carbon-based material production process in auxiliary material, reduces sludge carbon-based material production cost.
The method that the utilization sludge that the present invention is provided prepares sludge carbon-based material is described in detail above, the above
The explanation of embodiment is only intended to help and understands technical scheme and its core concept, it is noted that for this technology
For the technical staff in field, under the premise without departing from the principles of the invention, some improvement can also be carried out to the present invention and are repaiied
Decorations, these are improved and modification is also fallen into the protection domain of the claims in the present invention.
Claims (9)
1. a kind of method that utilization sludge prepares sludge carbon-based material, it is characterised in that comprise the following steps：
(1) bakee：Sludge is bakeed through low temperature to be obtained bakeing solid product and bakees gaseous product；
(2) mix：Solid product, modifying agent will be bakeed and be well mixed with the condensed light component that step (7) condensation is obtained, it is modified
Agent is 2~5 with the mass ratio for bakeing solid product:1；
(3) it is pyrolyzed：The mixture that step (2) is obtained carries out high temperature pyrolysis, obtains pyrolysis solid product and pyrolysis gas product；
(4) mix：Solid product will be pyrolyzed and mixed with the condensation heavy component that step (7) condensation is obtained；
(5) forming and hardening：The mixture that step (4) is obtained carries out forming and hardening, obtains forming and hardening product；
(6) activate：The forming and hardening product that step (5) is obtained activate obtaining sludge carbon-based material；
(7) condense：The baking gaseous product and pyrolysis gas product of generation during step (1), step (3) are carried out respectively
Condensation separation, obtains condensed light component, condensation heavy component, water and fixed gas, wherein bakeing gaseous product and pyrolysis gas
It is used for step (4) after the condensation heavy component mixing obtained after product condensation, bakees the condensation obtained after gaseous product condensation light
Matter component is used for step (2).
2. the method that utilization sludge according to claim 1 prepares sludge carbon-based material, it is characterised in that：In step (1)
Described stoving temperature is 200 DEG C~350 DEG C, and the baking time is 2~6h.
3. the method that utilization sludge according to claim 1 prepares sludge carbon-based material, it is characterised in that：In step (3)
Described pyrolysis temperature is 500 DEG C~900 DEG C, and pyrolysis time is 0.5~2h.
4. the method that utilization sludge according to claim 1 prepares sludge carbon-based material, it is characterised in that：In step (6)
Described activation temperature is 600 DEG C~1000 DEG C, and soak time is 5~10h.
5. the method that the utilization sludge according to claim 1 or 2 or 3 or 4 prepares sludge carbon-based material, it is characterised in that：
The one kind of modifying agent in phosphoric acid, sulfuric acid, sodium hydroxide, potassium hydroxide, zinc chloride or potassium permanganate described in step (2)
More than.
6. the method that the utilization sludge according to claim 1 or 2 or 3 or 4 prepares sludge carbon-based material, it is characterised in that：
Moisture percentage in sewage sludge described in step (1) is 30%~80%.
7. the method that the utilization sludge according to claim 1 or 2 or 3 or 4 prepares sludge carbon-based material, it is characterised in that：
Described fixed gas is produced as the flue gas that baking process provides thermal source by burning.
8. the method that utilization sludge according to claim 1 or 2 prepares sludge carbon-based material, it is characterised in that：Bakee gas
The light components pH value that the condensed process of body product is obtained is 2~4, the light components that the condensed process of pyrolysis gas product is obtained
PH value is 2~4.
9. the method that utilization sludge according to claim 8 prepares sludge carbon-based material, it is characterised in that：In step (3)
The condensed light component that the condensed process of pyrolysis gas product is obtained is used for the pyrolysis step that follow-up sludge prepares sludge carbon-based material
In rapid.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108640471A (en) * | 2018-06-07 | 2018-10-12 | 环境保护部华南环境科学研究所 | A kind of comprehensive utilization of mud device and method |
| 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 |
| WO2022036799A1 (en) * | 2020-08-18 | 2022-02-24 | 大连理工大学 | Device and method for preparing in situ formed biochar with high specific surface area |
| CN114540034A (en) * | 2022-01-17 | 2022-05-27 | 浙江省生态环境科学设计研究院 | Hexavalent chromium contaminated soil remediation agent and preparation and application thereof |
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| CN1903422A (en) * | 2005-07-29 | 2007-01-31 | 南京理工大学 | Method for preparing mud adsorbent used for desulfurization of flue-gas |
| CN101851520A (en) * | 2010-04-29 | 2010-10-06 | 江苏中容电气有限公司 | Sludge pyrolysis gas fractional condensation method for recycling biological oil |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1903422A (en) * | 2005-07-29 | 2007-01-31 | 南京理工大学 | Method for preparing mud adsorbent used for desulfurization of flue-gas |
| CN101851520A (en) * | 2010-04-29 | 2010-10-06 | 江苏中容电气有限公司 | Sludge pyrolysis gas fractional condensation method for recycling biological oil |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108640471A (en) * | 2018-06-07 | 2018-10-12 | 环境保护部华南环境科学研究所 | A kind of comprehensive utilization of mud device and method |
| 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 |
| 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 |
| WO2022036799A1 (en) * | 2020-08-18 | 2022-02-24 | 大连理工大学 | Device and method for preparing in situ formed biochar with high specific surface area |
| CN114540034A (en) * | 2022-01-17 | 2022-05-27 | 浙江省生态环境科学设计研究院 | Hexavalent chromium contaminated soil remediation agent and preparation and application thereof |
| CN114540034B (en) * | 2022-01-17 | 2023-07-04 | 浙江省生态环境科学设计研究院 | Hexavalent chromium contaminated soil remediation agent and preparation and application thereof |
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Application publication date: 20170908 |