CN106744952A - The method that sewage sludge prepares modified active coke - Google Patents
The method that sewage sludge prepares modified active coke Download PDFInfo
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- CN106744952A CN106744952A CN201611072096.8A CN201611072096A CN106744952A CN 106744952 A CN106744952 A CN 106744952A CN 201611072096 A CN201611072096 A CN 201611072096A CN 106744952 A CN106744952 A CN 106744952A
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- sludge
- modified active
- coke
- active coke
- coal dust
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
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Abstract
The present invention discloses a kind of method that sewage sludge prepares modified active coke, comprises the following steps：(1) waste polyvinyl chloride is added during sludge carbonization；(2) carbonization process flue gas of the generation containing HCl and heavy metal contaminants is carried out into fume treatment；The present invention is in carbonization process; add waste polyvinyl chloride that Heavy Metals in Sludge compound is converted into volatile heavy metal chloride; it is set to migrate at high temperature into flue gas and be captured by smoke processing system; to reduce Heavy Metals in Sludge, minimizing, resource and the environmental protection treatment of sludge are realized.
Description
Technical field
The present invention relates to a kind of method that sewage sludge prepares modified active coke.
Background technology
Sewage sludge is the accessory substance of generation in municipal wastewater processing procedure, and processing waste water per ton can produce 3~5 kilograms of dirts
Mud.According to statistics, China's sewage sludge yield in 2015 is more than 47,000,000 tons, and it is innoxious to pass through landfill, burning etc. at present
The sludge quantity processed with minimizing is only the 30% of sludge total amount.Contain nutrient nitrogen and phosphorus in sludge, can be as fertilizer by agriculture
With, but because 70~90% heavy metals (Cd, Pb, Cu, As, Cr, Ni) in the flocculation process of sewage disposal can be by adsorbing or sinking
Form sediment and be transferred in sludge, limit the approach of its recycling.From sludge treating method, landfill place is increasingly dilute
Lack, and there is potential soil and groundwater pollution risk, cause sludge directly landfill plan not for a good while；Sludge organism treatment
Technology is still immature, and lacks the standardized management to product；Heat treatment technics have volume reduction amount it is big, can energy recovery etc. it is excellent
Point, but need to solve the emission control of heavy metal in flue gas.
Activated carbon/Jiao has the advantages that structural porous, specific surface area are big, surface-active is high, is widely used as chemical industry, Shui Chu
The adsorbent or catalyst carrier of the industries such as reason, atmospheric treatment.Contain organic matter in sludge, can be by charing and activation process system
Standby Viability charcoal/Jiao.Chinese patent CN105170131A discloses a kind of preparation method of sludge carbon base desulphurization denitration catalyst,
Sludge carbon is prepared using hydro-thermal charring, the avtive spot of sludge is increased and has been loaded rare-earth metal catalyst, improve it
Denitrification efficiency；Chinese patent CN104556030A discloses a kind of for preparing bigger serface activated carbon using sludge
Control method, by " two step three-stage processes ", improves the specific surface area of activated coke, in flue gas and sewage harmful components it is net
Change.Sludge is directly prepared into activated carbon by existing research mostly, does not account for its mechanical performance and heavy metal that may be present
Secondary pollution problem.
The content of the invention
Regarding to the issue above, the present invention provides and a kind of reduce sludge huge sum of money content, realizes sludge reduction and resource
The method that sewage sludge prepares modified active coke.
To reach above-mentioned purpose, the method that a kind of sewage sludge of the invention prepares modified active coke is comprised the following steps：
(1) waste polyvinyl chloride is added during sludge carbonization；
(2) carbonization process flue gas of the generation containing HCl and heavy metal contaminants is carried out into fume treatment.
Preferably, also comprising the following steps before the step (1)：
(1) dewatered sludge is carried out into indirectly drying treatment and obtains dewatered sludge；
(2) dewatered sludge in step (1) is carried out into crushing and grinding treatment；
(3) by the dewatered sludge after break process in step (2) according to dewatered sludge 3~15%, coal dust 84~96%, viscous
Connect agent 1% and be mixed with shaping；
(4) sludge and coal dust of mixed-forming in step (3) are carried out into 0.5~2h charing process.
Preferably, also comprising the following steps after the sludge of the mixed-forming and coal dust charing process：
(1) to activator is added in the sludge and coal dust of mixed-forming after charing, activated coke is obtained after carrying out activation process；
(2) obtained activated coke is immersed into modifying agent, drying obtains modified active coke after being modified treatment.
Preferably, activating agent described in the activation process is zinc chloride activating agent, the activation temperature of the activation process
It it is 900~1100 DEG C, soak time is 1~3h；
Preferably, the V that modifying agent is described in the modification2O5Colloidal solution；
The specific steps of the modification include：
(1) it is 0.1~0.5mol/L by activated coke immersion concentration, temperature is 105~120 DEG C of V2O5Colloidal solution；
(2) activated coke immersion V2O51~5h of colloidal solution after take out and under the conditions of 105 DEG C dry.
Sludge and coal dust are prepared into activated coke by the present invention jointly using appropriate mixing ratio, and are added in carbonization process
Waste polyvinyl chloride, on the one hand realizes the resource recycling of waste polyvinyl chloride, on the one hand reduces the content of Heavy Metals in Sludge,
Ensure its mechanical performance while improving activated coke absorption property, and the activity of safety and environmental protection is prepared by detoxification and method of modifying
It is burnt；Compared with activated carbon, activated coke have high mechanical strength and it is cheap the characteristics of, be mainly used in the desulphurization denitration of flue gas.
Brief description of the drawings
Fig. 1 is that the sewage sludge of Example 1 and Example 2 of the present invention prepares the flow chart of modified active coke.
Specific embodiment
With reference to Figure of description, the present invention will be further described.
Embodiment 1
The method that a kind of sewage sludge of the present embodiment prepares modified active coke, comprises the following steps：
(1) waste polyvinyl chloride is added during sludge carbonization；
(2) carbonization process flue gas of the generation containing HCl and heavy metal contaminants is carried out into fume treatment.
Also comprise the following steps before the step (1)：
(1) dewatered sludge is carried out into indirectly drying treatment and obtains dewatered sludge；
(2) dewatered sludge in step (1) is carried out into crushing and grinding treatment；
(3) by the dewatered sludge after break process in step (2) according to dewatered sludge 3~15%, coal dust 84~96%, viscous
Connect agent 1% and be mixed with shaping；
(4) sludge and coal dust of mixed-forming in step (3) are carried out into 0.5~2h charing process.
Also comprise the following steps after the sludge and coal dust charing process of the mixed-forming：
(1) to activator is added in the sludge and coal dust of mixed-forming after charing, activated coke is obtained after carrying out activation process；
(2) obtained activated coke is immersed into modifying agent, drying obtains modified active coke after being modified treatment.
Activating agent described in the activation process is zinc chloride activating agent, the activation temperature of the activation process for 900~
1100 DEG C, soak time is 1~3h.
The V that modifying agent is described in the modification2O5Colloidal solution.
The specific steps of the modification include：
(1) it is 0.1~0.5mol/L by activated coke immersion concentration, temperature is 105~120 DEG C of V2O5Colloidal solution；
(2) activated coke immersion V2O51~5h of colloidal solution after take out and under the conditions of 105 DEG C dry；
The method entirety step：
(1) carry out indirectly drying treatment in the case where temperature is for 180~220 DEG C to obtain moisture content by dewatered sludge is 15~25%
Dewatered sludge；
(2) dewatered sludge in step (1) is carried out into crushing and grinding treatment, particle diameter is reduced to below 200~325 mesh；
(3) by the dewatered sludge after break process in step (2) according to dewatered sludge 3~15%, coal dust 84~96%, viscous
Connect agent 1% and be mixed with shaping；
(4) sludge and coal dust of mixed-forming in step (3) are carried out at 0.5~2h charings at 600~800 DEG C of temperature
Reason, adds polyvinyl chloride in carbonization process；
(5) added after activator carries out activation process in the sludge and coal dust of mixed-forming after being carbonized to step (4) and obtained
Activated coke；
(6) drying obtains modified active coke after obtained activated coke immersion modifying agent being modified into treatment.
Add waste polyvinyl chloride in carbonization process, waste polyvinyl chloride is being decomposed since 230 DEG C or so in heating process
Produce HCl, the HCl heavy metal chlorinations corresponding with the reaction generation of Heavy Metals in Sludge (Pb, Cd, Cu, Zn etc.) oxide of generation
Thing.Reactive chemistry formula is as follows：
3(CH2CHCl)n=3nHCl+nC6H6
2HCl+PbO=PbCl2+H2O
2HCl+CdO=CdCl2+H2O
2HCl+ZnO=ZnCl2+H2O
2HCl+CuO=CuCl2+H2O
Simultaneously heavy metal chloride there is the characteristics of fusing point is low, vapour pressure is high, within the temperature range of charing it is volatilizable extremely
Flue gas is condensate in particulate matter, and carbonization time (0.5~2h) more long is conducive to the transfer of heavy metal chloride, and heavy metal goes
Except rate is higher than 50%.The dirts such as the excessive HCl and the heavy metal chloride of volatilization that are further produced using smoke processing system removal
Dye thing；Polyvinyl chloride decomposes the formation that the gas for producing is conducive to loose structure in activated coke simultaneously；
Sludge and coal dust prepare activated coke jointly, by adjust ratio can improve traditional activated Jiao specific surface area is big, hole
Capacity rate, adsorptivity, improve charcoal source content and mechanical performance in activated carbon or activated coke；
Be converted into for Heavy Metals in Sludge by carbonization process in carbonization process, adding waste polyvinyl chloride by the present embodiment
Volatile heavy metal chloride, makes it migrate at high temperature into flue gas and be captured by smoke processing system, to reduce activity
The content of heavy metal in Jiao, while polyvinyl chloride decomposes the formation that the gas for producing is conducive to loose structure in activated coke；Simultaneously
The characteristics of using organic matter is rich in sewage sludge, it is prepared into activated coke jointly with coal dust by proper proportion, significantly carried
On the premise of high activity Jiao's adsorption efficiency, minimizing and the resource of sludge are realized；The activated coke that sludge is prepared jointly with coal dust,
The specific surface area that can improve traditional activated Jiao is big, pore volume rate, adsorptivity, solves charcoal source in sludge-based activated carbon or activated coke
Low, activated carbon bad mechanical property problem.
Embodiment 2
As shown in figure 1, being based on embodiment 1, activating agent described in activation process described in the present embodiment is zinc chloride activating agent,
The activation temperature of activation process is 900~1100 DEG C, and soak time is 1~3h.
The V that modifying agent is in the modification2O5Colloidal solution, the V2O5Colloidal solution concentration for 0.1~
0.5mol/L, temperature is 105~120 DEG C；Activated coke immersion V in modification2O5The colloidal solution time be 1~5h, after taking-up
Dried under the conditions of 105 DEG C and modified active coke is obtained；
Comprise the following steps that：The temperature of sludge drying is 200 DEG C, and dewatered sludge moisture content after desiccation is reduced to 20%, warp
Dewatered sludge, coal dust and binding agent are prepared shaping by disintegrating machine grinding to 200 mesh according to 5%, 94% and 1% mass fraction,
Carbonization temperature is 600 DEG C, and carbonization time is 1h, and addition is the waste polyvinyl chloride of 20~100g/t- activated cokes in carbonization process；
Pb clearances reach 62%, Cd clearances and reach 82%, Zn clearances and reach 70%, Cu clearances and reach 67%, and retort is produced
By pollutants such as smoke processing system removal HCl, heavy metals, the activator for using is zinc chloride, activation temperature to raw flue gas
It is 900 DEG C, soak time is 3h, the activated coke immersion V obtained after activation2O5Colloidal solution in, colloid concentration is 0.2mol/
L, activated coke impregnates 2h in the modifying agent that temperature is 105 DEG C, and modified active coke is obtained.
Using V2O5Modified active coke, increases catalytic site catalysis NO in activated cokexDecompose, chemical decomposition formula is as follows：
4NO+4NH3+O2=4N2+6H2O
2NO2+4NH3+O2=3N2+6H2O
In the present embodiment carbonization process, add waste polyvinyl chloride that Heavy Metals in Sludge is converted into volatile heavy metal chlorine
Compound, makes it migrate at high temperature into flue gas and be captured by smoke processing system, to reduce the content of heavy metal in activated coke,
Polyvinyl chloride decomposes the formation that the gas for producing is conducive to loose structure in activated coke simultaneously；It is organic using being rich in sewage sludge
The characteristics of matter, it is prepared into activated coke jointly with coal dust by proper proportion, significantly improves the premise of activated coke adsorption efficiency
Under, realize minimizing and the resource of sludge；Sludge prepares activated coke jointly with coal dust, and traditional work can be improved by adjusting ratio
Property burnt specific surface area is big, pore volume rate, adsorptivity, while solving sludge-based activated carbon or activated charcoal source is low, activated carbon is mechanical
The problem of poor performance；Using V2O5Modified active coke, increases the avtive spot of activated coke, can effectively improve NO in flue gasxRemoving
Efficiency.
Embodiment 2 chooses content in embodiment 1 in scope, proportioning, temperature and concentration on the basis of the embodiment 1,
Illustrate that the numerical value in any content, proportioning, temperature and the concentration range of embodiment 1 should all be covered in protection scope of the present invention
Within.
More than, only presently preferred embodiments of the present invention, but protection scope of the present invention is not limited thereto, any to be familiar with sheet
Those skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in should all be covered
Within protection scope of the present invention.Therefore, the protection domain that protection scope of the present invention should be defined by claim is defined.
Claims (5)
1. a kind of method that sewage sludge prepares modified active coke, it is characterised in that：Comprise the following steps：
(1) waste polyvinyl chloride is added during sludge carbonization；
(2) carbonization process flue gas of the generation containing HCl and heavy metal contaminants is carried out into fume treatment.
2. a kind of method that sewage sludge prepares modified active coke as claimed in claim 1, it is characterised in that：The step (1)
Also comprise the following steps before：
(1) dewatered sludge is carried out into indirectly drying treatment and obtains dewatered sludge；
(2) dewatered sludge in step (1) is carried out into crushing and grinding treatment；
(3) by the dewatered sludge after break process in step (2) according to dewatered sludge 3~15%, coal dust 84~96%, bonding agent
1% is mixed with shaping；
(4) sludge and coal dust of mixed-forming in step (3) are carried out into 0.5~2h charing process.
3. a kind of method that sewage sludge prepares modified active coke as claimed in claim 2, it is characterised in that：The mixed-forming
Sludge and coal dust charing process after also comprise the following steps：
(1) to activator is added in the sludge and coal dust of mixed-forming after charing, activated coke is obtained after carrying out activation process；
(2) obtained activated coke is immersed into modifying agent, drying obtains modified active coke after being modified treatment.
4. a kind of method that sewage sludge prepares modified active coke as claimed in claim 3, it is characterised in that：The activation process
Described in activating agent be zinc chloride activating agent, the activation temperature of the activation process is 900~1100 DEG C, soak time is 1~
3h。
5. a kind of method that sewage sludge prepares modified active coke as claimed in claim 3, it is characterised in that：The modification
Described in the modifying agent V that is2O5Colloidal solution；
The specific steps of the modification include：
(1) it is 0.1~0.5mol/L by activated coke immersion concentration, temperature is 105~120 DEG C of V2O5Colloidal solution；
(2) activated coke immersion V2O51~5h of colloidal solution after take out and under the conditions of 105 DEG C dry.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107188386A (en) * | 2017-07-17 | 2017-09-22 | 北京建筑大学 | A kind of method that utilization sewage plant excess sludge prepares charcoal |
| CN108373248A (en) * | 2018-02-01 | 2018-08-07 | 东华大学 | A method of quickly preparing porous magnetic activated coke based on dewatered sludge |
| CN110092553A (en) * | 2019-04-10 | 2019-08-06 | 浙江清风源环保科技有限公司 | A method of based on pyrolyzing sludge curing heavy metal |
| CN117535685A (en) * | 2024-01-09 | 2024-02-09 | 常熟理工学院 | Method for recycling elemental phosphorus from municipal sludge |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52152895A (en) * | 1976-06-15 | 1977-12-19 | Agency Of Ind Science & Technol | Converting red mud and chlorine-contg. org. cpds. into non-polluting substances and reclaiming iron component |
| US4381923A (en) * | 1976-09-20 | 1983-05-03 | Kazuhiro Wada | Isotope separation with an infrared laser |
| CN101717176A (en) * | 2009-12-04 | 2010-06-02 | 陈子庭 | Method for dehydrating and recycling sludge containing heavy metallic elements |
| US20110306808A1 (en) * | 2003-03-28 | 2011-12-15 | Ab-Cwt, Llc | Process For Conversion of Organic, Waste, or Low-Value Materials Into Useful Products |
| CN102432007A (en) * | 2011-09-23 | 2012-05-02 | 南京工业大学 | Method for preparing activated carbon by physically activating excess sludge |
| CN102764657A (en) * | 2012-08-10 | 2012-11-07 | 武汉科技大学 | Nano V205/activated coke denitration catalyst and preparation method of catalyst |
-
2016
- 2016-11-29 CN CN201611072096.8A patent/CN106744952B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52152895A (en) * | 1976-06-15 | 1977-12-19 | Agency Of Ind Science & Technol | Converting red mud and chlorine-contg. org. cpds. into non-polluting substances and reclaiming iron component |
| US4381923A (en) * | 1976-09-20 | 1983-05-03 | Kazuhiro Wada | Isotope separation with an infrared laser |
| US20110306808A1 (en) * | 2003-03-28 | 2011-12-15 | Ab-Cwt, Llc | Process For Conversion of Organic, Waste, or Low-Value Materials Into Useful Products |
| CN101717176A (en) * | 2009-12-04 | 2010-06-02 | 陈子庭 | Method for dehydrating and recycling sludge containing heavy metallic elements |
| CN102432007A (en) * | 2011-09-23 | 2012-05-02 | 南京工业大学 | Method for preparing activated carbon by physically activating excess sludge |
| CN102764657A (en) * | 2012-08-10 | 2012-11-07 | 武汉科技大学 | Nano V205/activated coke denitration catalyst and preparation method of catalyst |
Non-Patent Citations (1)
| Title |
|---|
| 鲍国臣等: "剩余污泥制活性炭及其应用研究进展", 《材料导报A：综述篇》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107188386A (en) * | 2017-07-17 | 2017-09-22 | 北京建筑大学 | A kind of method that utilization sewage plant excess sludge prepares charcoal |
| CN108373248A (en) * | 2018-02-01 | 2018-08-07 | 东华大学 | A method of quickly preparing porous magnetic activated coke based on dewatered sludge |
| CN108373248B (en) * | 2018-02-01 | 2021-07-27 | 东华大学 | Method for rapidly preparing porous magnetic activated coke based on dewatered sludge |
| CN110092553A (en) * | 2019-04-10 | 2019-08-06 | 浙江清风源环保科技有限公司 | A method of based on pyrolyzing sludge curing heavy metal |
| CN117535685A (en) * | 2024-01-09 | 2024-02-09 | 常熟理工学院 | Method for recycling elemental phosphorus from municipal sludge |
| CN117535685B (en) * | 2024-01-09 | 2024-04-02 | 常熟理工学院 | Method for recycling elemental phosphorus from municipal sludge |
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