CN104327896A - Method of comprehensive utilization of sludge in sewage treatment plant - Google Patents
Method of comprehensive utilization of sludge in sewage treatment plant Download PDFInfo
- Publication number
- CN104327896A CN104327896A CN201410500647.0A CN201410500647A CN104327896A CN 104327896 A CN104327896 A CN 104327896A CN 201410500647 A CN201410500647 A CN 201410500647A CN 104327896 A CN104327896 A CN 104327896A
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- Prior art keywords
- sludge
- sewage treatment
- treatment plant
- comprehensive utilization
- coal
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention relates to a method of comprehensive utilization of sludge in a sewage treatment plant and belongs to the field of a method of comprehensive utilization of sludge. The method includes following steps: collecting the sludge from the sewage treatment plant, performing filter pressing to the sludge, digesting the sludge at middle temperature, drying and crushing the sludge, mixing the sludge with daily common coal according to a certain proportion to prepare mixed coal for being used as a boiler fuel, thereby achieving the object of the comprehensive utilization of the sludge. In the invention, digested sludge is dewatered and crushed and then is mixed with common coal to prepare the mixed coal which can be used as the boiler fuel. The mixed coal can achieve an ideal boiler coal standard completely. A boiler combustion actual operation experiment proves that the boiler is normal in operation when the mixed coal is employed. By means of the method in the invention, the sludge from the sewage treatment plant, as the boiler fuel, can be used in production heat supply in the sewage treatment plant on site, thereby achieving better economic benefit and environmental benefit.
Description
Technical field
The present invention relates to the method for a kind of sludge of sewage treatment plant comprehensive utilization, belong to the method field of comprehensive utilization of mud.
Background technology
Along with the continuous increase of big-and-middle-sized secondary biochemical sewage work of China as the primary sludge of its by product and secondary sludge also in continuous increase, the sludge quantity that B-grade sewage treatment plant produces is about the 0.3%-0.5% (volume) of sewage disposal total amount, for the sewage work of a day output tens0000 tons, day sludge output is about 300-500m3, compressed decrement is after water ratio 75%, and volume is 22.5-37.5m3.Along with improving constantly of socioeconomic development and living standards of the people, industry and sanitary sewage amount also will continue to increase, sludge yield also can be increasing, the continuous accumulation of this solid waste, the waste of land resources certainly will be caused, and bring serious secondary pollution, exert heavy pressures on to ecotope.How to make this solid waste resource recovery, become the another key subjects that current environment protection work faces.
At present, international and domesticly in the resource utilization problem of mud, explore many new roads, the methods such as main employing burning, pyrolysis and manufacture agricultural composite fertilizer dispose the mud after dehydration, as countries such as U.S., days, burn pyrolysis processing method and need adopt specific equipment, and investment is larger, this and China's present society economic development level not too adapt to, if as Agricultural Fertilizer, heavy metal composition then owing to containing in mud is difficult to separation and a large amount of pathogenic micro-organism is not removed, blindly without stint drops into farmland, inevitably can cause secondary pollution.
Therefore, study that a kind of technique is simple, less investment, to the method for comprehensive utilization of mud, there is good economic and social benefit.
Summary of the invention
The present invention aims to provide that a kind of technique is simple, less investment, method to comprehensive utilization of mud.
The method of sludge of sewage treatment plant comprehensive utilization of the present invention, comprises the following steps:
By sludge of sewage treatment plant collection, press filtration, then mesophilic digestion, drying, pulverizing, mix according to a certain ratio with daily conventional fire coal, makes mixing fire coal, for the fuel of boiler, can reach the object to comprehensive utilization of mud.
Preferably, digested sludge of the present invention is 2:8 with coal-fired weight proportion.
Preferred, the dry water content of digested sludge of the present invention is 5%-10%, is ground into 3-10mm particle.
The method of comprehensive utilization of the present invention, is after digested sludge being dewatered, after pulverizing, is mixed and mixes fire coal, can be used as boiler oil with common fire coal.According to the calorimetry to mud, calorific value is the thermal value that 10062kJ/kg can be equivalent to brown coal, is greater than medium Btu 3400kJ/kg, does not need another refuel can spontaneous combustion.The component concentration of obtained mixing fire coal is analyzed as follows: silt content 20%, total moisture 1.68%, ash content 21.20%, volatile matter 16.05%, fixed carbon 60.37%, interior water 1.64%, thermal value 26415kg/kg, fullys meet desirable steam coal standard.Burn actual motion test through boiler to prove, use the mixing obtained by method of the present invention coal-fired, boiler operatiopn is normal.
The method of comprehensive utilization of the present invention, is after digested sludge being dewatered, after pulverizing, is mixed and mixes fire coal, can be used as boiler oil with common fire coal.Obtained mixing is coal-fired, fullys meet desirable steam coal standard.Burn actual motion test through boiler to prove, use the mixing obtained by method of the present invention coal-fired, boiler operatiopn is normal.Utilize method of the present invention, the mud of sewage work is applied on the spot the production heat supply of Sewage Plant as boiler oil, good economic benefit and environmental benefit can be obtained.
Embodiment
Embodiment one:
By sludge of sewage treatment plant collection, press filtration, then mesophilic digestion, be dried to the water yield and be 5%-10%, be ground into 3-10mm particle, then mix by weight 2:8 with daily conventional fire coal, make mixing fire coal, for the fuel of boiler, the object to comprehensive utilization of mud can be reached.
Embodiment two:
Mixing obtained by method of the present invention is coal-fired, and its compositional analysis obtains: silt content 20%, total moisture 1.68%, ash content 21.20%, volatile matter 16.05%, fixed carbon 60.37%, interior water 1.64%, thermal value 26415kg/kg, fullys meet desirable steam coal standard.Burn actual motion test through boiler to prove, use the mixing obtained by method of the present invention coal-fired, boiler operatiopn is normal.
Claims (3)
1. the method for sludge of sewage treatment plant comprehensive utilization, comprises the following steps:
By sludge of sewage treatment plant collection, press filtration, then mesophilic digestion, drying, pulverizing, mix according to a certain ratio with daily conventional fire coal, makes mixing fire coal, for the fuel of boiler, can reach the object to comprehensive utilization of mud.
2. the method for sludge of sewage treatment plant comprehensive utilization as claimed in claim 1, is characterized in that described digested sludge is 2:8 with coal-fired weight proportion.
3. the method for sludge of sewage treatment plant comprehensive utilization as claimed in claim 1, is characterized in that the dry water content of described digested sludge is 5%-10%, is ground into 3-10mm particle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410500647.0A CN104327896A (en) | 2014-09-26 | 2014-09-26 | Method of comprehensive utilization of sludge in sewage treatment plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410500647.0A CN104327896A (en) | 2014-09-26 | 2014-09-26 | Method of comprehensive utilization of sludge in sewage treatment plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104327896A true CN104327896A (en) | 2015-02-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410500647.0A Pending CN104327896A (en) | 2014-09-26 | 2014-09-26 | Method of comprehensive utilization of sludge in sewage treatment plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104327896A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101012095A (en) * | 2007-01-29 | 2007-08-08 | 清华大学 | Low consumption highly effective sludge drying method |
| US20120196240A1 (en) * | 2009-08-30 | 2012-08-02 | Technion Research & Development Foundation Ltd. | Method and system for treating sewage sludge |
-
2014
- 2014-09-26 CN CN201410500647.0A patent/CN104327896A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101012095A (en) * | 2007-01-29 | 2007-08-08 | 清华大学 | Low consumption highly effective sludge drying method |
| US20120196240A1 (en) * | 2009-08-30 | 2012-08-02 | Technion Research & Development Foundation Ltd. | Method and system for treating sewage sludge |
Non-Patent Citations (1)
| Title |
|---|
| 张成等: ""煤粉掺烧干化污泥的燃烧特性及能效分析", 《热能动力工程》 * |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150204 |