CN103739179A - Sludge pre-treatment method - Google Patents
Sludge pre-treatment method Download PDFInfo
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- CN103739179A CN103739179A CN201310565020.9A CN201310565020A CN103739179A CN 103739179 A CN103739179 A CN 103739179A CN 201310565020 A CN201310565020 A CN 201310565020A CN 103739179 A CN103739179 A CN 103739179A
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Abstract
The invention relates to a sludge pre-treatment method, which comprises: conveying sludge into a reaction kettle through a sludge pump while adding a sludge treatment additive to the reaction kettle, introducing steam to the reaction kettle, stirring and carrying out a reaction. According to the method, the pre-treatment is performed on the sludge, the sludge treatment agent is added, the steam is introduced, and stirring and the low temperature pyrolysis reaction are concurrently performed so as to eliminate organic matters in the sludge and kill pathogens, such that the pre-treated sludge can be further utilized.
Description
Technical field
The present invention relates to Sludge Disposal Techniques field, particularly, relate to a kind of pre-treating process of mud.
Background technology
Along with the quickening of Urbanization in China, treatment rate of domestic sewage improves year by year, and the sludge yield of municipal sewage plant also sharply increases.Because mud has large, unstable, the easy corruption of generation, foul smelling, feature containing hazardous and noxious substances such as parasitic ovum, pathogenic micro-organism and heavy metals, therefore without after the mud entered environment of suitably processing, can bring secondary pollution directly to water body and atmosphere, not only reduced the effective processing capacity of Sewage treatment systems, and ecotope and mankind's activity have been formed to serious threat.Therefore, the same with other waste, the object of sludge treatment and disposal and the governing principle that need to follow are stabilization, minimizing, resource utilization and innoxious to greatest extent.
At present, the method that sludge treatment is disposed mainly contains: sanitary landfill, directly soil utilization, burning, mummification and thermal treatment.Now with regard to each method of disposal, be summarized as follows:
The sanitary landfill of mud: mud sanitary landfill starts from the sixties in 20th century is the Sludge Disposal Techniques of a comparative maturity.Mud both separately landfill also can with domestic refuse landfill together with industrial waste.This method of disposal is simple, easily row, cost are low, and mud does not need again high dehydration, strong adaptability.Landfill yard is generally discarded pit or natural bottom land.But also there are some problems in Sludge landfill, the espespecially formation of loading embeading percolation liquid and gas.Percolate is a kind of liquid being heavily polluted, if site selection of landfill or move improperly, this liquid will enter Water table, polluted underground water environment.The gas that landfill yard produces is mainly methane, if do not take appropriate measures, can set off an explosion and burn.In addition, the place that is applicable to Sludge landfill is also more and more limited because of a large amount of outputs of municipal sludge, and this has also limited further developing of this method.
The direct soil utilization of mud: mud soil directly utilizes because of less investment, energy consumption is low, working cost is low, organic moiety can change into the advantages such as soil improvement agent composition, be considered to have most a kind of disposal options of development potentiality, this disposal options is that mud is applied to the land remediation of farmland, vegetable plot, orchard, meadow, municipal greening, seedling medium and serious disturbance and reconstruction etc.Scientific and reasonable soil utilization, can reduce the negative effect that mud brings.The utilization of forest land and municipal administration greening is because being difficult for causing the pollution of food chain to become the effective means that mud soil utilizes.Mud is for reparation and the reconstruction in the soil of serious disturbance (soil that need to reclaim as mining site soil, forest harvesting field, refuse landfill, area of heavy damage, earth's surface etc.), reduce the potential threat of mud to human lives, not only disposed mud but also recovered ecotope.But we must be noted that the content of objectionable impurities when utilizing mud, should be not affecting crop growth, do not pollute agricultural-food, polluted underground water not, especially not serious contaminated soil, the spoiled soil ecosystem is not principle.
The burning of mud: directly burn and apply comparatively generally again after wet sludge anhydration, directly do not burn not only very difficultly through the mud of mummification, and be also extremely uneconomic in energy consumption.Take burn as the method for sludge treatment of core be method for sludge treatment the most thoroughly, it can make the whole carbonizations of organism, pathogen kill can reduce sludge volume to greatest extent; But its shortcoming is treatment facility, investment is large, and processing costs is high.
The low temperature pyrogenation processing of mud: Heat-chemical Treat Method of Sludge is because it is innoxious and thorough reduction, and status strengthens gradually.But traditional thermochemical treatment (burning method) need add auxiliary fuel conventionally, and expense is higher.Pyrolyzing municipal sludge is a kind of developing energy recovery type Heat-chemical Treat Method of Sludge technology.It by under catalyst action anaerobic heat drying mud to certain temperature (<500 ℃), by destructive distillation and thermolysis effect, make mud be converted into oil, reaction water, non-condensable gases and 4 kinds of combustible products of charcoal, maximum conversion rate depends on the kind of mud composition and catalyzer, normal productive rate is 200～300L(oil)/ton (dry mud), its character is similar to diesel oil.Low temperature pyrogenation is Net Energy output procedure, and cost is lower than direct burning.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of pre-treating process of mud, the method is carried out pre-treatment to mud, by adding sludge treating agent, pass into steam, low temperature pyrogenation reaction is carried out in stirring, eliminate the organism in mud, pathogen kill, so that further utilize the mud after pre-treatment.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of pre-treating process of mud, comprise the steps: mud to be delivered in reactor by sludge pump, in reactor, add sludge treatment additive, then in reactor, pass into steam and stir, react simultaneously; The mass ratio of sludge treatment additive and mud is 0.1-5:1000, the formula of sludge treatment additive consists of following component by weight: water glass 5-10 part, calcium carbonate 1-3 part, flyash 2-3 part, magnesium chloride 2-4 part, iron trichloride 1-2 part, calcium hydroxide 4-8 part, polymerize aluminum chloride 0.5-1 part, cationic-type polyacrylamide 0-0.5 part.
The mass ratio of described sludge treatment additive and mud is 1-3:1000.
The formula of described sludge treatment additive consists of following component by weight: water glass 5-7 part, calcium carbonate 2-3 part, flyash 2-3 part, magnesium chloride 3-4 part, iron trichloride 1-1.5 part, calcium hydroxide 5-6 part, polymerize aluminum chloride 0.5-0.8 part, cationic-type polyacrylamide 0.2-0.4 part.
The formula of described sludge treatment additive consists of following component by weight: 6 parts of water glass, 2.5 parts, calcium carbonate, 2.5 parts, flyash, 3 parts, magnesium chloride, 1.2 parts of iron trichlorides, 5 parts, calcium hydroxide, 0.6 part of polymerize aluminum chloride, 0.3 part of cationic-type polyacrylamide.
Reacted mud provides industrial heat resources or generating for sludge incineration after dewatering, being dried, or mixes clay for baking light bricks, or for the preparation of light ceramic.
The equipment that dehydration adopts is plate-and-frame filter press or belt filter press.
The invention has the beneficial effects as follows: method of the present invention, by mud is carried out to pre-treatment, by adding sludge treating agent, passes into steam, low temperature pyrogenation reaction is carried out in stirring, eliminate the organism in mud, pathogen kill, so that further utilize the mud after pre-treatment.
Embodiment
Embodiment 1:
The method of utilizing steam low-temperature pyrolysis lignin-sludge of the present embodiment, comprises the steps: mud to be delivered in reactor by sludge pump, adds sludge treatment additive in reactor simultaneously, then in reactor, passes into steam and stirs, reacts; The mass ratio of sludge treatment additive and mud is 1:1000, and the formula of sludge treatment additive consists of following component by weight: 5 parts of water glass, 1 part, calcium carbonate, 2 parts, flyash, 2 parts, magnesium chloride, 1 part of iron trichloride, 4 parts, calcium hydroxide, 0.5 part of polymerize aluminum chloride.
Experiment shows, adopts this sludge treatment additive to pass into steam reaction, and larger molecular organics elimination factor is 87%, and the killing rate of pathogenic agent is 93%.
Embodiment 2:
The method of utilizing steam low-temperature pyrolysis lignin-sludge of the present embodiment, comprises the steps: mud to be delivered in reactor by sludge pump, adds sludge treatment additive in reactor simultaneously, then in reactor, passes into steam and stirs, reacts; The mass ratio of sludge treatment additive and mud is 1:1000, the formula of sludge treatment additive consists of following component by weight: 5 parts of water glass, 2 parts, calcium carbonate, 2.5 parts, flyash, 3 parts, magnesium chloride, 1.5 parts of iron trichlorides, 6 parts, calcium hydroxide, 0.8 part of polymerize aluminum chloride, 0.2 part of cationic-type polyacrylamide.
Experiment shows, adopts this sludge treatment additive to pass into steam reaction, and larger molecular organics elimination factor is 92%, and the killing rate of pathogenic agent is 95%.
Embodiment 3:
The method of utilizing steam low-temperature pyrolysis lignin-sludge of the present embodiment, comprises the steps: mud to be delivered in reactor by sludge pump, adds sludge treatment additive in reactor simultaneously, then in reactor, passes into steam and stirs, reacts; The mass ratio of sludge treatment additive and mud is 3:1000, the formula of sludge treatment additive consists of following component by weight: 6 parts of water glass, 2.5 parts, calcium carbonate, 2.5 parts, flyash, 3 parts, magnesium chloride, 1.2 parts of iron trichlorides, 5 parts, calcium hydroxide, 0.6 part of polymerize aluminum chloride, 0.3 part of cationic-type polyacrylamide.
Experiment shows, adopts this sludge treatment additive to pass into steam reaction, and larger molecular organics elimination factor is 96%, and the killing rate of pathogenic agent is 98%.
In above-mentioned three embodiment, reacted mud provides industrial heat resources or generating for sludge incineration after dewatering, being dried, or mixes clay for baking light bricks, or for the preparation of light ceramic.The equipment that dehydration adopts is plate-and-frame filter press or belt filter press.
As mentioned above, can implement preferably the present invention.
Claims (6)
1. a pre-treating process for mud, is characterized in that, comprises the steps: mud to be delivered in reactor by sludge pump, adds sludge treatment additive in reactor simultaneously, then in reactor, passes into steam and stirs, reacts; The mass ratio of sludge treatment additive and mud is 0.1-5:1000, the formula of sludge treatment additive consists of following component by weight: water glass 5-10 part, calcium carbonate 1-3 part, flyash 2-3 part, magnesium chloride 2-4 part, iron trichloride 1-2 part, calcium hydroxide 4-8 part, polymerize aluminum chloride 0.5-1 part, cationic-type polyacrylamide 0-0.5 part.
2. the pre-treating process of a kind of mud according to claim 1, is characterized in that, the mass ratio of described sludge treatment additive and mud is 1-3:1000.
3. the pre-treating process of a kind of mud according to claim 1, it is characterized in that, the formula of described sludge treatment additive consists of following component by weight: water glass 5-7 part, calcium carbonate 2-3 part, flyash 2-3 part, magnesium chloride 3-4 part, iron trichloride 1-1.5 part, calcium hydroxide 5-6 part, polymerize aluminum chloride 0.5-0.8 part, cationic-type polyacrylamide 0.2-0.4 part.
4. the pre-treating process of a kind of mud according to claim 3, it is characterized in that, the formula of described sludge treatment additive consists of following component by weight: 6 parts of water glass, 2.5 parts, calcium carbonate, 2.5 parts, flyash, 3 parts, magnesium chloride, 1.2 parts of iron trichlorides, 5 parts, calcium hydroxide, 0.6 part of polymerize aluminum chloride, 0.3 part of cationic-type polyacrylamide.
5. the pre-treating process of a kind of mud according to claim 1, is characterized in that, reacted mud provides industrial heat resources or generating for sludge incineration after dewatering, being dried, or mixes clay for baking light bricks, or for the preparation of light ceramic.
6. the pre-treating process of a kind of mud according to claim 5, is characterized in that, the equipment that dehydration adopts is plate-and-frame filter press or belt filter press.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104150517A (en) * | 2014-08-04 | 2014-11-19 | 南通科纯化工有限公司 | Comprehensive utilization and production method for treating two wastes |
| CN106396302A (en) * | 2015-07-28 | 2017-02-15 | 江苏吉华化工有限公司 | Chemical industry sludge treatment method |
| CN106957137A (en) * | 2017-05-22 | 2017-07-18 | 陶圣香 | A kind of method for sludge treatment |
| CN110104928A (en) * | 2018-01-30 | 2019-08-09 | 辽宁德智环保技术有限公司 | A kind of method of recycling treatment municipal sludge |
| TWI678338B (en) * | 2016-09-02 | 2019-12-01 | 綠威環保科技股份有限公司 | Drug dehydration reduction system |
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| JP2004267950A (en) * | 2003-03-11 | 2004-09-30 | Japan Sewage Works Agency | Treating method of organic material-containing sludge |
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| CN102108003A (en) * | 2011-01-26 | 2011-06-29 | 郑建国 | Sludge dewatering additive |
| CN102267795A (en) * | 2011-06-17 | 2011-12-07 | 中国科学院武汉岩土力学研究所 | Dewatered sludge drying method of wastewater treatment plant |
| CN102826733A (en) * | 2012-07-19 | 2012-12-19 | 南京林业大学 | Method for efficiently dewatering of sludge |
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2013
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| JPH07124597A (en) * | 1993-11-04 | 1995-05-16 | Kankyo Eng Kk | Organic sludge treatment method |
| JP2004267950A (en) * | 2003-03-11 | 2004-09-30 | Japan Sewage Works Agency | Treating method of organic material-containing sludge |
| CN101290121A (en) * | 2007-04-18 | 2008-10-22 | 深圳市环源科技发展有限公司 | Wet sludge anhydration burning processing system and process |
| CN102108003A (en) * | 2011-01-26 | 2011-06-29 | 郑建国 | Sludge dewatering additive |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104150517A (en) * | 2014-08-04 | 2014-11-19 | 南通科纯化工有限公司 | Comprehensive utilization and production method for treating two wastes |
| CN104150517B (en) * | 2014-08-04 | 2016-04-27 | 南通科纯化工有限公司 | The useless comprehensive utilization production method of a kind of process two |
| CN106396302A (en) * | 2015-07-28 | 2017-02-15 | 江苏吉华化工有限公司 | Chemical industry sludge treatment method |
| TWI678338B (en) * | 2016-09-02 | 2019-12-01 | 綠威環保科技股份有限公司 | Drug dehydration reduction system |
| CN106957137A (en) * | 2017-05-22 | 2017-07-18 | 陶圣香 | A kind of method for sludge treatment |
| CN110104928A (en) * | 2018-01-30 | 2019-08-09 | 辽宁德智环保技术有限公司 | A kind of method of recycling treatment municipal sludge |
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Application publication date: 20140423 |