CN102765866B - Method for recycling urban sludge - Google Patents
Method for recycling urban sludge Download PDFInfo
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- CN102765866B CN102765866B CN2012102541239A CN201210254123A CN102765866B CN 102765866 B CN102765866 B CN 102765866B CN 2012102541239 A CN2012102541239 A CN 2012102541239A CN 201210254123 A CN201210254123 A CN 201210254123A CN 102765866 B CN102765866 B CN 102765866B
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- sludge
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- mixing granulation
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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
Abstract
The invention discloses a method for recycling urban sludge, and relates to the technical fields of urban sludge treatment and recycling. The method comprises the following steps of: performing primary treatment on the sludge by using a drying system, performing secondary treatment on the produced sludge by using a mixing and forming system, adding the obtained sludge particles into a carbonization system for pyrolysis, and recycling a three-phase product produced by pyrolysis in the sewage treatment and carbonization processes for comprehensive utilization. The process steps are continuous and matched to form an integrated system, the process is simple, and the method has the advantages of good treatment effect, high broad-spectrum property, no secondary pollution, low energy consumption, capability of recycling the product for comprehensive utilization, and the like.
Description
Technical field
The present invention relates to a kind of municipal sludge and handle, and the resource treatment technique field.
Background technology
In recent years, China's town sewage processing cause has obtained very big development, makes China's water surrounding obtain very big improvement.But the rapid increase of water treatment plant and sewage load, the sewage sludge total amount that causes urban wastewater treatment firm to produce in sewage treatment process is also sharply soaring, threatens the source thereby become the new environmental pollution in China city.
According to statistics, the main method that China's urban wastewater treatment firm sewage sludge disposal is used is agricultural use, land landfill, other disposal (comprising burning), the investment that is used for the sludge treatment disposal accounts for 20%～50% of sewage work's gross investment, well below the level of developed country 70%.But the mud agricultural use can cause heavy metal-polluted soil concentration to increase, and enters atmosphere and water body environment indirectly, thereby threatens human health; The mud landfill can take a large amount of land resources, and can cause potential environmental hazard; And sludge incineration is handled and almost can all be removed multiple harmful substances, but burning sludge needs a large amount of thermals source, and heat mostly is not recovered utilization again, and cost is very high, invest also very big, and in the burning process also with serious atmospheric pollution.
Summary of the invention
At the deficiencies in the prior art, the object of the present invention is to provide a kind of economy, effectively, sludge treatment method of disposal that use range is wide, to realize minimizing, the innoxious and resource utilization of mud.
The present invention includes sludge dehydrating and drying, mixing granulation and middle temperature charing step.
Wherein, described sludge dehydrating and drying is: sludge dewatering to the water ratio after the municipal effluent dehydration is down to 40～60%.
Described mixing granulation is: with behind the sludge crushing of mummification with the admixture mixing granulation; Described admixture is water ratio less than 15% coal dust, or flyash, or at least a arbitrarily in the broken end of biomass.
The coal dust that the present invention adopts, or flyash, or biomass are the material with better pyrolysis performance, are beneficial to follow-up thorough charing.
Water ratio is 20% ± 2% in the pellet of above-mentioned mixing granulation.
Warm charing is warm charing system pyrolysis under the condition of secluding air during pellet is entered in described, obtains solid coke, liquid tar, liquid wood vinegar and combustible gas respectively.The final flue gas of system is handled back discharging, not Han dioxin.
The pyrolysis temperature of warm charing system is 600 ± 50 ℃ in described, and the pyrolytic reaction time is 30 ± 5min.
The present invention through in decomposition after the warm charing obtain solid coke, liquid tar, liquid wood vinegar and combustible gas, wherein, solid coke can be used as water conditioner, can add in the aeration tank, municipal sewage plant; Be added into the mixing moulding system after liquid tar reclaims and participate in granulation; The liquid wood vinegar adds in municipal sewage plant's anoxic pond as denitrifying carbon source; Combustible gas strile-backs through tubing system, is charing and drying and other treatment system supplemental heat source, realizes the product recycle.
The present invention has the following advantages:
1, the present invention proposes a kind of effective sewage sludge and finally handle disposal method, compared with prior art, have characteristics such as treatment effect is good, broad spectrum is strong, energy consumption is low, running cost is low.
2, the present invention has realized the minimizing of mud, innoxious and recycling treatment, non-secondary pollution, and the dioxin of particularly Wuing generates, obvious social benefit.
3, the admixture of Tian Jiaing has promoted the moulding of mud granule, has strengthened the porousness of final carbonizing production coke, and has reduced the drying and other treatment cost.
4, the invention allows for novel product utilization mode:
1) solid coke adds in the aeration tank, municipal sewage plant as water conditioner, has strengthened wastewater treatment efficiency;
2) the liquid wood vinegar adds in municipal sewage plant's anoxic pond as denitrifying carbon source, has promoted the denitrogenation processing effect, has reduced the cost of sewage work's additional carbon;
3) be added into the mixing moulding system after liquid tar reclaims, participate in granulation and further second pyrolysis aerogenesis;
4) combustible gas is drying and other treatment system and charing treatment system supplemental heat source by strile-bacing.
5, based on the system and device of this scheme constructs, integrate material collection, material transmission, energy conduction, product utilization, vent gas treatment, the ingenious compactness of structure design, energy recovery utilization ratio height.
Description of drawings
Fig. 1 is process flow sheet of the present invention.
Description of reference numerals: 1 is the drying and other treatment system; 2 is the mixing moulding system; 3 are the charing treatment system; 4 is coke; 5 is the aeration tank; 6 is tar; 7 is wood vinegar; 8 is anoxic pond; 9 is combustible gas.
Embodiment
For invented technology can better be understood, below will be by specific embodiment and the present invention is described in detail by reference to the accompanying drawings.
The preparation admixture: water ratio is lower than 15% and have pyrolysis performance preferably, includes but are not limited to the broken end of coal dust, flyash and biomass.
Treatment step: referring to Fig. 1, after the sewage treatment plant dewater sludge of water ratio about 80% compiled or collecting, continuous feeding to drying and other treatment system 1 carries out dehydration and drying, moisture percentage in sewage sludge drops between 40～60% after the mummification, after break process, mix with admixture, by 2 granulations of mixing moulding system, the mud granule water ratio drops to about 20%.Warm charing system 3 pyrolysis under the condition of secluding air in then entering, the mud granule pyrolysis temperature is about 600 ℃, and the pyrolytic reaction time is about 30min.Obtain solid-liquid gas three-phase product: solid coke 4, liquid tar 6, liquid wood vinegar 7 and combustible gas 9, the final flue gas of system is handled back discharging, not Han dioxin.
Claims (3)
1. a city sewage sludge reclamation treatment process comprises sludge dehydrating and drying, mixing granulation and middle temperature charing step; It is characterized in that described mixing granulation is: with behind the sludge crushing of mummification with the admixture mixing granulation; Described admixture is water ratio less than 15% coal dust, or flyash, or at least a arbitrarily in the broken end of biomass; Warm charing is warm charing system pyrolysis under the condition of secluding air during pellet is entered in described, obtains solid coke, liquid tar, liquid wood vinegar and combustible gas respectively; The pyrolysis temperature of warm charing system is 600 ± 50 ℃ in described, and the pyrolytic reaction time is 30 ± 5min.
2. according to the described city sewage sludge reclamation treatment process of claim 1, it is characterized in that described sludge dehydrating and drying is: sludge dewatering to the water ratio after the municipal effluent dehydration is down to 40～60%.
3. according to the described city sewage sludge reclamation treatment process of claim 1, it is characterized in that water ratio is 20% ± 2% in the pellet of described mixing granulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102541239A CN102765866B (en) | 2012-07-23 | 2012-07-23 | Method for recycling urban sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012102541239A CN102765866B (en) | 2012-07-23 | 2012-07-23 | Method for recycling urban sludge |
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| CN102765866A CN102765866A (en) | 2012-11-07 |
| CN102765866B true CN102765866B (en) | 2013-09-25 |
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| CN2012102541239A Active CN102765866B (en) | 2012-07-23 | 2012-07-23 | Method for recycling urban sludge |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103224315B (en) * | 2013-03-21 | 2014-05-14 | 曹玉成 | Sludge comprehensive treatment and conversion product recycle method |
| CN105753281B (en) * | 2016-04-27 | 2018-10-12 | 柳建国 | Biological sludge commercial treatment method and system |
| CN107986591A (en) * | 2017-12-11 | 2018-05-04 | 杨明远 | The processing method of sludge |
| CN108033657B (en) * | 2017-12-18 | 2020-04-24 | 北京城市排水集团有限责任公司 | Method for improving adsorption performance of pyrolysis and carbonization of sludge |
| CN108529844A (en) * | 2018-06-14 | 2018-09-14 | 陕西煤业化工技术研究院有限责任公司 | A kind of sewage sludge gas heat carrier classification low temperature pyrogenation system and method |
| CN108911453A (en) * | 2018-07-06 | 2018-11-30 | 四川建筑职业技术学院 | A kind of black base-material and preparation method thereof using sludge preparation and prepare production line |
| CN109160503A (en) * | 2018-08-02 | 2019-01-08 | 上海市政工程设计研究总院（集团）有限公司 | A kind of sludge carbon conditioner and its application in compost |
| CN109704539A (en) * | 2018-12-13 | 2019-05-03 | 南京三聚生物质新材料科技有限公司 | A kind of recycling treatment method of oil-bearing sludge |
| CN110240911A (en) * | 2019-04-28 | 2019-09-17 | 张波 | A kind of biomass solid wastes pyrolysis processing technique |
| CN110624547A (en) * | 2019-10-24 | 2019-12-31 | 河南工程学院 | Preparation method and application of supported catalyst for preparing combustible gas by catalytic pyrolysis of dried municipal sludge |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102205964A (en) * | 2011-04-25 | 2011-10-05 | 山东大学 | Granular activated carbon filler for paper mill sludge and preparation method thereof |
| CN102225806A (en) * | 2011-05-24 | 2011-10-26 | 合肥工业大学 | Magnetic biological carrier and preparation method thereof |
| CN102309954A (en) * | 2010-07-07 | 2012-01-11 | 泰山学院 | Adsorbing material produced from regenerated papermaking sludge and preparation method thereof |
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2012
- 2012-07-23 CN CN2012102541239A patent/CN102765866B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102309954A (en) * | 2010-07-07 | 2012-01-11 | 泰山学院 | Adsorbing material produced from regenerated papermaking sludge and preparation method thereof |
| CN102205964A (en) * | 2011-04-25 | 2011-10-05 | 山东大学 | Granular activated carbon filler for paper mill sludge and preparation method thereof |
| CN102225806A (en) * | 2011-05-24 | 2011-10-26 | 合肥工业大学 | Magnetic biological carrier and preparation method thereof |
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