CN101270878A - City sewage sludge reclamation processing and utilization method - Google Patents
City sewage sludge reclamation processing and utilization method Download PDFInfo
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- CN101270878A CN101270878A CNA2008100607610A CN200810060761A CN101270878A CN 101270878 A CN101270878 A CN 101270878A CN A2008100607610 A CNA2008100607610 A CN A2008100607610A CN 200810060761 A CN200810060761 A CN 200810060761A CN 101270878 A CN101270878 A CN 101270878A
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Abstract
The invention discloses a method for the resourceful treatment and utilization of the municipal sludge. The invention is that the municipal sludge with 75 percent to 85 percent water content with the coal powder is grinded by a wet ball mill to obtain the mixing granules which accord with the gradation requirements; and the coarse product of the sludge coal water slurry is produced through the addition of the water and dispersant agent according to the technical proportion; the stabilizer is added after 10 minutes standing of the slurry; and the finished product of the sludge coal water slurry is produced, which is in accordance with the GB/T18855-2002 Coal Water Slurry Technical Condition; the finished product of the sludge coal water slurry is transported to the coal water slurry boiler, which is burned as the fuel for the treatment and utilization of the municipal sludge. The slurry production technique is simple, which suits for the industrialized mass production; the product is suitable for the common coal water slurry boiler, which replaces part of the using coal and using water of the coal water slurry while effectively utilizing the heat value of the sludge. The invention can save the coal resource and the water resource, which is an economical and mature on the technology method for the resourceful treatment and utilization of the municipal sludge.
Description
Technical field
The present invention relates to a kind of method of solid waste resource recovery processing and utilizing, specifically be under dispersant cooperates, to utilize wet ball grinding technology to produce sludge water-coal-slurry municipal sludge and coal dust, and utilize cool water mixture burning to come recycling treatment to utilize the method for municipal sludge.
Background technology
The dewatered sludge of the annual discharging of wastewater treatment in China factory at present is about 550 * 10
4～600 * 10
4Ton, wherein the dewatered sludge of the annual discharging in municipal sewage plant reaches 50 * 10 approximately
4Ton, and increasing with the speed greater than 10% every year.As existing four forts in Hangzhou, (the sewage daily handling ability totally 110 ten thousand m for two municipal sewage plants of seven lattice
3, wherein the secondary biochemical treatment scale is 900,000 m
3), daily output mud (moisture content 75～85%) about 600 tons.Because enormous amount, the stacking of mud and jettison all and can cause secondary pollution to environment is so the disposal of mud processing is faced with huge difficulty.The main disposal options of mud has landfill, throws sea, burning, compost etc. both at home and abroad, but all there is certain restrictive condition in these methods in practical application.Therefore, seek the more efficiently disposal options of mud, make its purpose that really reaches minimizing, innoxious, resource, become the hot issue widely paid close attention in the China and even the world it
Water-coal-slurry is a kind of coal dust that is distributed by 60%～70% left and right sides different grain size; water about 29%～39% and 1% left and right sides chemical addition agent are mixed with the liquid mixture that forms; the clean fuel of a kind of novel low pollutant emission that occurs when being end of the seventies international petroleum crisis; can be as oil pumping, atomizing, accumulating, and can be directly used in the burning of various boilers, kiln.Contain organic substance in the mud, value (all kinds of mud butt calorific values are all more than 6000kJ/kg) with fuel, so dewatered sludge has better burning property in theory, but mud after dewatering moisture content also more than 75%, remove moisture during burning and also need consumption of calorie, so its reality burning property is unsatisfactory, act as a fuel with wet mud fully, generally can't fire burns.So mud is directly prepared water-coal-slurry with coal dust, also alternative part coal and water when effectively utilizing sludge calorific value, coal and water resource have promptly been saved, can make mud obtain the recycling treatment utilization again, be a kind of new thought that is different from the recycling sludge processing and utilizing of sludge incineration processing.
Chinese patent literature CN1594514A discloses a kind of " sludge water-coal-slurry and manufacture craft thereof ", and it is with the finished product water-coal-slurry of municipal sludge and the moisture 30-40% of moisture 70-85%, adds mixed pulp behind the finished product dispersant.This method has following improper: 1, need utilize the finished product water-coal-slurry, cause process procedure to increase, and then improve the slurrying cost; 2, according to the prepared sludge water-coal-slurry of its method, on performance indications, be difficult to reach fully the requirement of GB/T18855-2002 " COAL-WATER SLURRY TECHNOLOGY condition ", be not suitable for scale and commercialization is applied.
Summary of the invention
The invention provides a kind of convenient and simple for operationly, be fit to existing water-coal-slurry fabricating technology and equipment, can carry out industrial applications city sewage sludge reclamation processing and utilizing method.
A kind of method of city sewage sludge reclamation processing and utilizing comprises:
(1) with the weight note,, and in mechanical milling process, adds 0.2～0.8 part of dispersant and 24～30 parts of water, make the sludge water-coal-slurry crude product 5～10 parts of municipal sludges, 60～70 parts of coal mixing and ball milling;
(2) leave standstill 10-15 minute behind the sludge water-coal-slurry crude product pulp that step (1) is made after, add stabilizing agent, make the finished product sludge water-coal-slurry;
(3) the finished product sludge water-coal-slurry that step (2) is made is delivered to the coal water slurry boiler burning that acts as a fuel.
Described dispersant is polycarboxylate system's dispersant or lignosulfonates.
Described stabilizing agent is carboxymethyl cellulose stabilizing agent or lignosulfonates, and addition is generally 0.6%～0.7% of sludge water-coal-slurry crude product gross weight for the common dose of preparation coal water slurry process.
Described sludge water-coal-slurry crude product, granularity is below 0.50% greater than 300 microns content, and granularity is less than 75 microns content more than 75%.
Optimum feed stock set of dispense ratio of the present invention is 10 parts of municipal sludges, 60 parts of coals, 0.75 part of dispersant, 29.3 parts of water.
The present invention does not change the water-coal-slurry slurring technology of existing coal water mixture plant, is fit to suitability for industrialized production, and product meets GB/T18855-2002 " COAL-WATER SLURRY TECHNOLOGY condition " national standard, is applicable to the light water fluid-fired boiler, has the condition and the basis of large-scale promotion.Because municipal sludge does not need to dehydrate in advance processing, therefore do not need further device for dehydrating sladge waste; Can when effectively utilizing sludge calorific value, substitute part coal and slurrying water, promptly save coal and water resource, can make mud obtain the recycling treatment utilization again; Compare with Chinese patent literature CN1594514A " sludge water-coal-slurry and manufacture craft thereof ", can shorten first manufactured goods water-coal-slurry and add the technological process of mud again, and product satisfies the national standard requirement, is a kind of technical maturation, economically feasible city sewage sludge reclamation processing and utilizing method therefore.By producing 500000 tons of coal water mixture plants per year, can dissolve every year about 50,000 tons in mud, substitute 0.5 ten thousand tons/year of coal dusts (being worth about 3,000,000 yuan), economize on water 2.0 ten thousand tons/year (being worth about 40,000 yuan), saving Treatment of Sludge takes: ten thousand yuan/year of 50 yuan/ton * 50000=250, add up to annual cost-savedly 5,540,000, be equivalent to increase more than 500 ten thousand yuan of net profits.Can dissolve simultaneously 50,000 tons of municipal sludges subtract and account for 60 mu in soil, and economic benefit, environmental benefit are also very remarkable.
Description of drawings
Fig. 1 is the inventive method process chart.
The specific embodiment
Embodiment 1: the employing calorific value is 26.82MJ/kg, volatile matter 33.61%, and fixed carbon 54.19%, the coal of ash content 10.49% and moisture content are 78.50%, volatile matter 37.25%, fixed carbon 5.44%, the municipal sludge of ash content 57.31%.
With 5 parts of municipal sludges, 62 parts of coal mixing and ball milling, in mechanical milling process, add 0.5 part of lignin sulfonic acid dipersant, 32.5 parts of water, making granularity is 0.07% greater than 300 microns content, and is 81.86% sludge water-coal-slurry crude product less than 75 microns content; Obtain leaving standstill 10 minutes behind the pulp, it is 61.95% that the carboxymethyl cellulose stabilizing agent of interpolation sludge water-coal-slurry crude product gross weight 0.6%～0.7% makes concentration, ash content 7.16%, sulphur content 0.40%, volatile matter 37.02%, caloric value reach the finished product water-coal-slurry of 17.44MJ/kg.It is delivered to the coal water slurry boiler burning, and its burnout rate can reach 98%, and the ash content residual rate is less than 8%.
Embodiment 2: the employing calorific value is 26.72MJ/kg, volatile matter 34.08%, and fixed carbon 53.93%, the coal of ash content 11.14% and moisture content are 78.13%, volatile matter 39.43%, fixed carbon 11.18%, the municipal sludge of ash content 49.36%.
With 10 parts of municipal sludges, 60 parts of coal mixing and ball milling, in mechanical milling process, add 0.75 part of polycarboxylate system's dispersant, 29.3 parts of water, making granularity is 0.09% greater than 300 microns content, and is 81.67% sludge water-coal-slurry crude product less than 75 microns content; Obtain leaving standstill 15 minutes behind the pulp, it is 60.57% that the lignosulfonates of interpolation sludge water-coal-slurry crude product gross weight 0.6%～0.7% obtain concentration, ash content 7.49%, and sulphur content 0.43%, volatile matter 37.32%, caloric value reaches the finished product water-coal-slurry of 17.02MJ/kg.It is delivered to the coal water slurry boiler burning, and its burnout rate can reach 98%, and the ash content residual rate is less than 8%.
Claims (5)
1, a kind of method of city sewage sludge reclamation processing and utilizing comprises:
(1) with the weight note,, and in mechanical milling process, adds 0.2～0.8 part of dispersant and 24～30 parts of water, make the sludge water-coal-slurry crude product 5～10 parts of municipal sludges, 60～70 parts of coal mixing and ball milling;
(2) leave standstill 10-15 minute behind the sludge water-coal-slurry crude product pulp that step (1) is made after, add stabilizing agent, make the finished product sludge water-coal-slurry;
(3) the finished product sludge water-coal-slurry that step (2) is made is delivered to the coal water slurry boiler burning that acts as a fuel.
2, the method for claim 1 is characterized in that: the component of sludge water-coal-slurry crude product is: 10 parts of municipal sludges, 60 parts of coals, 0.75 part of dispersant, 29.3 parts of water.
3, the method for claim 1 is characterized in that: described dispersant is polycarboxylate system's dispersant or lignosulfonates.
4, the method for claim 1 is characterized in that: described stabilizing agent is carboxymethyl cellulose stabilizing agent or lignosulfonates.
5, the method for claim 1 is characterized in that: described sludge water-coal-slurry crude product, granularity is below 0.50% greater than 300 microns content, and granularity is more than 75% less than 75 microns content.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810060761A CN100580317C (en) | 2008-04-18 | 2008-04-18 | City sludge reclamation processing and utilization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810060761A CN100580317C (en) | 2008-04-18 | 2008-04-18 | City sludge reclamation processing and utilization method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101270878A true CN101270878A (en) | 2008-09-24 |
| CN100580317C CN100580317C (en) | 2010-01-13 |
Family
ID=40005011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810060761A Expired - Fee Related CN100580317C (en) | 2008-04-18 | 2008-04-18 | City sludge reclamation processing and utilization method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831330A (en) * | 2010-05-26 | 2010-09-15 | 山东科技大学 | A kind of production method of clay coal water slurry |
| CN101666506B (en) * | 2009-09-28 | 2011-06-22 | 中环（中国）工程有限公司 | Method for preparing coal water slurry |
| CN102980201A (en) * | 2012-12-18 | 2013-03-20 | 中国轻工业武汉设计工程有限责任公司 | Mixed fit device for biomass fuel, paper sludge and coals |
| CN106016330A (en) * | 2016-05-16 | 2016-10-12 | 云南民族大学 | Method for treating alkali waste in coal chemical industry |
| CN106475393A (en) * | 2015-08-27 | 2017-03-08 | 中国石油化工股份有限公司 | A kind of acetic acid residue method for innocent treatment |
-
2008
- 2008-04-18 CN CN200810060761A patent/CN100580317C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666506B (en) * | 2009-09-28 | 2011-06-22 | 中环（中国）工程有限公司 | Method for preparing coal water slurry |
| CN101831330A (en) * | 2010-05-26 | 2010-09-15 | 山东科技大学 | A kind of production method of clay coal water slurry |
| CN102980201A (en) * | 2012-12-18 | 2013-03-20 | 中国轻工业武汉设计工程有限责任公司 | Mixed fit device for biomass fuel, paper sludge and coals |
| CN102980201B (en) * | 2012-12-18 | 2014-11-12 | 中国轻工业武汉设计工程有限责任公司 | Mixed fit device for biomass fuel, paper sludge and coals |
| CN106475393A (en) * | 2015-08-27 | 2017-03-08 | 中国石油化工股份有限公司 | A kind of acetic acid residue method for innocent treatment |
| CN106016330A (en) * | 2016-05-16 | 2016-10-12 | 云南民族大学 | Method for treating alkali waste in coal chemical industry |
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| Publication number | Publication date |
|---|---|
| CN100580317C (en) | 2010-01-13 |
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