CN101289637B - Method for preparing clean fuel derived from sludge - Google Patents
Method for preparing clean fuel derived from sludge Download PDFInfo
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- CN101289637B CN101289637B CN200710119840XA CN200710119840A CN101289637B CN 101289637 B CN101289637 B CN 101289637B CN 200710119840X A CN200710119840X A CN 200710119840XA CN 200710119840 A CN200710119840 A CN 200710119840A CN 101289637 B CN101289637 B CN 101289637B
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- sludge
- mud
- clean fuel
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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
- Y02E50/10—Biofuels, e.g. bio-diesel
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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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- Treatment Of Sludge (AREA)
Abstract
The invention provides a method for manufacturing sludge-derived clean fuel, which is operated according to the following steps of: sludge pretreatment, aerobic fermentation of sludge, sludge conditioning, sludge dehydration, product molding and product drying. The method for manufacturing the sludge-derived clean fuel has the advantages of most thorough harmlessness and quantitative reduction, not only solves the problem of serious sludge pollution but also realizes harmlessness of the processing procedure, and simultaneously obtains a great deal of clean fuel which accords with fuel emission standards. The clean fuel is converted into corresponding market value through energy utilization, thereby the method makes up the processing cost of the sludge and reduces the overall cost for processing the sludge.
Description
Technical field
The present invention relates to the treatment process of mud, particularly a kind of manufacture method of clean fuel derived from sludge.
Background technology
Along with expanding economy, industrial, agriculture intensification degree is more and more higher, and the organic waste kind of generation is many, quantity is big, is the primary pollution source of ecotope, and the situation in " rubbish encirclement cities and towns " is increasingly serious.Wherein city domestic sewage treatment plant mud accounts for suitable share, and it is handled has become great environmental problem anxious to be solved.
Municipal sludge is the sedimentable matter that the municipal sewage plant produces in water treatment procedure, a large amount of microorganisms, organic matter and rich nutrient substances had both been contained, easily corrupt smelly, but mud also has the calorific value up to 3000～3500 kilocalories simultaneously, the heavy metal of exceeding standard, pathogenic micro-organism etc. are also arranged in the mud in addition, processing is not good at causing serious secondary pollution, and how safe utilization mud becomes one of emphasis problem of paying close attention to countries in the world.
At present, the countries in the world method for sludge treatment mainly is methods such as landfill, soil are agricultural, burning, drying and other treatment, and American-European most advanced countries all adopt and burn and the drying method processing, and China is main at present to adopt landfill and compost stage.
1, landfill disposal method
Because the landfill disposal method exists the land occupation amount big and can cause near the drawback in waters and the groundwater pollution landfill, world developed country seldom adopts at present.So the method for landfill disposal mud is tending towards superseded.
2, the agricultural method of mud
The agricultural less investment of mud, working cost is low, but has heavy metal contamination and parasitic ovum, pathogenic bacteria, viral profound secret worry.In states such as America and Europes, encourage recycle on the one hand; On the other hand, it is agricultural the concern of food safety then to be limited mud.China's mud is agricultural also to carry out experiment in many places, but did not also have a family can realize the industrialization operation up till now.Therefore see with regard to world wide that mud is agricultural to face strict day by day restriction.
3, incineration treatment method
Burning is a method for sludge treatment the most completely, and it can make the whole carbonizations of organism, pathogen kill, maximum ratio decrement.But special sludge incineration device facility investment is big, and the running cost height has problems such as Dioxins discharging, and high cost developing country is difficult to bear.But along with the vent gas treatment development of technology, the amount of handling in European and Japanese sludge incineration increases considerably.
4, emerging sludge drying processing method
It is emerging sludge treatment technology that sludge drying is handled, and the mud of collecting is directly inserted drying plant carry out drying and other treatment, and it is original 15%～20% that sludge volume is reduced to, and the output object proterties is stable, pathogen-free domestic.Mud after the mummification can be used as fertilizer, also can be made into satisfactory substitute energy through secondary treatment.
At present sludge treatment present situation; need develop a kind of sewage sludge harmlessness, energy, mass-producing method of comprehensive utilization; not only can solve serious pollution problem; a large amount of high-grade fuels that can also obtain directly to utilize simultaneously, meet combustion row standard, this also is aim of the present invention place.
Summary of the invention
The objective of the invention is defective at above-mentioned prior art; a kind of manufacture method of clean fuel derived from sludge is provided; it is a kind of sewage sludge harmlessness, energy, mass-producing method of comprehensive utilization; not only serious pollution problem can be solved, a large amount of high-grade fuels of combustion row standard can also be obtained directly to utilize and to meet simultaneously.
The technical scheme taked of the present invention is to achieve these goals: a kind of manufacture method of clean fuel derived from sludge, be in the sludge drying treating processes, to have increased sludge aerobic fermentation and sludge conditioning, finished product forming step, after being come out, the drying system directly becomes the clean fuel that meets combustion row standard, specifically according to following step operation
The pre-treatment of step 1) mud is placed into the mud of collecting in the pre-storage tank of mud of sealing and stirs;
Step 2) sludge aerobic fermentation is transported to the mud sealing that stirs in the step 1) in the fermentor tank of sealing, adds deodorizing bacterial classification and denitrogenation bacterial classification simultaneously, and oxygenation stirring 6-8 hour, while controlled temperature carry out aerobic fermentation at 10-60 ℃;
The step 3) sludge conditioning is with step 2) sealing of the fermented sludge that obtains is transported in the conditioning jar of sealing, adds sulphur-fixing agent and stablizer simultaneously, by mixing;
Step 4) sludge dewatering, the mud after the step 3) conditioning carries out processed, isolates solid formation and liquid phase thing, and the liquid phase thing is stand-by by water treatment system back up to standard discharging, solid formation fragmentation;
The step 5) formed product, the solid formation that step 4) is obtained carries out formed product;
The step 6) product drying, the moulding product that step 5) is obtained carries out drying treatment, obtains derived from sludge clean fuel finished product, and the mud powder of generation is back to step 5) and proceeds formed product.
In order to make the present invention have more the feature of environmental protection, described step 1), 5) and 6) add biological deodorizing equipment in the process and carry out deodorizing and handle.
In order to make step 2) in bacterial classification obtain optimum growth speed, described step 2) in controlled temperature the best be 26-32 ℃.
For the mud foul smell to the pre-storage tank of mud that enters sealing seals and dilutes mud, implement before the described step 1), in the pre-storage tank of mud, inject the water that accounts for mud weight 50% earlier.
The invention has the beneficial effects as follows: the manufacture method of clean fuel derived from sludge of the present invention, has innoxious and minimizing advantage the most completely, not only solve the serious problem of mud and accomplished the innoxious for the treatment of processes, also obtained a large amount of clean fuels that meets combustion row standard simultaneously, be converted into corresponding marketable value by recovery energy, thereby, reduce the overall cost of sludge treatment as the processing cost that remedies mud.
Description of drawings
Fig. 1 is a schema of the present invention.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
The manufacture method of a kind of clean fuel derived from sludge as shown in Figure 1,
The pre-treatment of step 1) mud
With the water ratio of city domestic sewage treatment plant is that the mud of 80%-85% is collected stand-by, at first in the pre-storage tank of mud, inject the water that accounts for mud weight 50%, then in the pre-storage tank of mud that stand-by mud unification is unloaded at sealing, carry out 10 minutes stirring by stirring system.The benefit that adds the water stirring is: on the one hand, utilize water that the foul smell of mud is sealed, stop the diffusion of foul smell; On the other hand, mud is diluted, the sealing that helps pipeline is carried.
In the Working environment of wagon tremie unloading mud, increase biological deodorizing equipment, the foul smell that leaks is decomposed, prevent the generation of secondary pollution.
Step 2) sludge aerobic fermentation
With above-mentioned steps 1) in the mud that stirs seal immediately in the fermentor tank that is transported to sealing, and when mud arrives fermentor tank, by the 0.1% ratio interpolation deodorizing bacterial classification and the denitrogenation bacterial classification composite flora of fermented sludge weight, start the omnidistance oxygen supply of oxygen system then and stir 7 hours (fermentation time) of oxygenation stirring.For guaranteeing that bacterial classification can normally play a role, dissolved oxygen amount reaches 2 mg/litre at least, and the control temperature of fermentation is 30 ℃, can cause bacterium death because temperature is higher than 60 ℃, and be lower than 10 ℃ of bacterial growth speed and slow down or stop, but can be dead.Growth is fastest in the time of 26 ℃-32 ℃, so described controlled temperature the best is 26-32 ℃.BZT, OBT " bacterium+enzyme " the microbial preparation product that the composite flora of described interpolation uses U.S. BIO-FORM L.L.C. to produce, the product composition is genus bacillus, Saccharomycodes, micrococcus sp, enzyme, nutrition agent etc.
So by the pretreated mud of this step process, transmission equipment by sealing, send to the sludge fermentation jar of sealing, because the environment of closed fermentation can be controlled, foul smell is not excessive, do not multiply mosquitos and flies, fermenting process is not subjected to weather effect simultaneously, add the effect of ventilation oxygen supply and stirring system, guarantee the material ventilation fully, realize aerobic fermentation.Aerobic fermentation is decomposed into carbonic acid gas, water and a spot of ammonia to the organic matter in the mud (comprising nitrogenous organic matter), therefore stink is very little, thereby reach the purpose of mud being carried out deodorizing, denitrogenation, for avoiding the loss of lengthy fermentation, therefore adopt 6-8 hour short period of time fermentation to sludge calorific value; Biochemical action by the composite flora that adds is further to mud deodorization, denitrogenation; Oxygen system provides oxygen at fermenting process for mud, makes fermenting process become aerobic fermentation (anaerobically fermenting can cause stench); Stirring system can fully contact mud with oxygen, avoids producing partial anaerobically fermenting.
Aerobic fermentation itself has been the process of a deodorization, denitrogenation, adds deodorizing and denitrogenation bacterial classification simultaneously, strengthens deodorization, denitrogenation processing to mud, makes product burning qualified discharge.
The step 3) sludge conditioning
With step 2) sealing of the fermented sludge that obtains is transported in the conditioning jar of sealing, adds sulphur-fixing agent and stablizer simultaneously, by stirring mixing in 10 minutes, makes its additive and mud thorough mixing.Described sulphur-fixing agent major ingredient is a unslaked lime, is the 5% ratio adding in mud weight.Described stablizer mainly is made up of sanitas, activated carbon, coal dust and straw barreling powder, is the 15% ratio adding in mud weight.
So adding main component by this step is the sulphur-fixing agent of unslaked lime, makes itself and mud generation chemical reaction, thereby reach the purpose of solid sulphur, for the qualified combustion row of product gets ready; Also can strengthen the particle of mud solid formation simultaneously, be convenient to carrying out smoothly of mechanical dehydration.The stablizer that adds, the effect of its sanitas is to stablize the proterties of mud, prevents that mud from continuing fermentation, preserves the calorific value of mud; The effect of activated carbon and coal dust is the foul smell in the absorption mud, can replenish the part calorific value that mud loses in the aerobic fermentation process when playing deodorization again; The effect of straw barreling powder is to increase the Mierocrystalline cellulose of mud, thereby reduces the water-retentivity of mud, and the smooth implementation that dewaters for next step provides condition, also can improve the calorific value of product simultaneously.The stirring system purpose be to make mud can with the additive thorough mixing.So the mud by fermentation enters the conditioning stage, add sulphur-fixing agent and stablizer, make its thorough mixing by stirring, thereby further improve the calorific value of mud, the phase city of improving the sludge energy utilization is worth.The amendment that adds can also effective elimination product discharging sulfur in smoke.
Step 4) sludge dewatering
Step 3) is nursed one's health after the mud of modification, deodorization, denitrogenation, by the mud transferpump send into, the snail screw centrifuge, carrying out filter-press dehydration handles, be forced into the mechanical dehydration process of carrying out under the state of 16Mpa-18Mpa 30-45 minute, this step is selected the best mechanical dehydration that carries out 45 minutes to the state of 16Mpa of pressurization, liquid phase waste water that produces and water ratio are at 40% solid formation, and liquid phase waste water is through the water treatment system qualified discharge, and the solid formation of generation is stand-by.The room temp that press filtration requires must not be lower than 5 ℃, otherwise can influence the dehydration of product.
The step 5) formed product
Step 4) dehydration is obtained being delivered to formed product equipment after the solid formation fragmentation after the decrement carry out formed product,, be equipped with the mould of different size specification, carry out formed product by extrusion formation equipment.Though provide the mud of moulding to carry out deodorization, denitrogenation,, corresponding biological deodorizing equipment be set pointedly for preventing the generation of foul smell, the foul smell that produces in the moulding process is carried out collection and treatment, microorganism utilizes pollutent in the waste gas as the energy, the activity that earns a bare living, and it is decomposed into CO
2, H
2O and other inorganic salts, thus waste gas is purified, and waste gas after treatment meets GB14554-93 " odorant pollutant emission standard ".
The step 6) product drying
The moulding product that step 5) is obtained is delivered to low temperature drying system.In the holder basin, evenly stack moulding product thick to 250mm, place and disposed thermostatic hotblast stove top, around the hotblast stove and bottom is all airtight, thereby forces the hot blast of generation can only pass the moulding product bed of material, thereby produce the effect of oven dry, take away the moisture in the moulding product.The oven dry of this kind flow-through type, can fully take away the moisture content of material inside, prevent that material from producing the phenomenon of " sandwich ", while drying efficiency height, prevent the loss of calorific value, hyperthermia drying can be taken away the volatile matter (Vad) in the mud, and volatile matter and fixed carbon content (Fcad) are the main calorific value source of mud.Oven drying at low temperature can reduce the cost of oven dry, and exsiccant mud itself has been flammable materials simultaneously, and cryogenic operation more meets the principle of safety in production.The temperature of oven dry remains between 80-85 ℃, and drying time is 3-4 hour, and this step is selected 80 ℃ of optimum tempss, and drying time 4 hours finally obtains the derived from sludge clean fuel of finished product water ratio about 15%.
This step is utilized the flow-through type drying technology, makes mud fully absorb the heat of thermal source, when keeping calorific value moisture evaporation is fallen, and is dried into the derived from sludge clean fuel product of water ratio between 15%-20% at last.Be the generation of foul smell in the prevention drying process, the configuration biological deodorizing equipment, the hot blast that hotblast stove is produced enters the biological deodorizing equipment emission abatement behind flow-through type drying machine drying machine, and the standard that reaches the pollutent comprehensive discharge standard is carried out.
Utilize the manufacture method of a kind of clean fuel derived from sludge of the present invention, the calorific value that the clean fuel products index that finally obtains is〉3000 kilocalories; Moisture 15%～20%; Dropping strength 78%; Ultimate compression strength 400N/; Thermostability TS+3〉60%, TS+6〉40%.Confirm through a large amount of tests, utilize the burning and exhausting standard of the clean fuel that the present invention makes, 1) discharging of Dioxins, because the not chloride composition of clean fuel itself that produces, so in the use, the discharging of Dioxins does not have problems; 2) sulfurous gas and emission of carbon-dioxide, because clean fuel is low carbon products, so its sulfurous gas and emission of carbon-dioxide are all low than the discharging of coal-fired product; 3) discharging of nitride, the present invention adds the denitrogenation bacterial classification simultaneously by mud is carried out aerobic fermentation, makes the mud denitrogenation, makes its discharging and coal facies imitative.
The manufacture method of clean fuel derived from sludge of the present invention, has innoxious and minimizing advantage the most completely, not only solve the serious problem of mud and accomplished the innoxious for the treatment of processes, also obtained a large amount of clean fuels that meets combustion row standard simultaneously, be converted into corresponding marketable value by recovery energy, thereby, reduce the overall cost of sludge treatment as the processing cost that remedies mud.
Above-described embodiment, the present invention embodiment a kind of more preferably just, the common variation that those skilled in the art carries out in the technical solution of the present invention scope and replacing all should be included in protection scope of the present invention.
Claims (4)
1. the manufacture method of a clean fuel derived from sludge is characterized in that: carries out according to following step,
The pre-treatment of step 1) mud is placed into the mud of collecting in the pre-storage tank of mud of sealing and stirs;
Step 2) sludge aerobic fermentation is transported to the mud sealing that stirs in the step 1) in the fermentor tank of sealing, adds deodorizing bacterial classification and denitrogenation bacterial classification simultaneously, and oxygenation stirring 6-8 hour, controlled temperature carry out aerobic fermentation at 10-60 ℃;
The step 3) sludge conditioning, with step 2) sealing of the fermented sludge that obtains is transported in the conditioning jar of sealing, add sulphur-fixing agent and stablizer simultaneously, by mixing, wherein, described stablizer mainly is made up of sanitas, activated carbon, coal dust and stalk barreling powder, is the 15% ratio adding in mud weight;
Step 4) sludge dewatering, the mud after the step 3) conditioning carries out processed, isolates solid formation and liquid phase thing, and the liquid phase thing is stand-by by water treatment system back up to standard discharging, solid formation fragmentation;
The step 5) formed product, the solid formation that step 4) is obtained carries out formed product;
The step 6) product drying, the moulding product that step 5) is obtained carries out drying treatment, obtains derived from sludge clean fuel finished product, and the mud powder of generation is back to step 5) and proceeds formed product.
2. by the manufacture method of the described clean fuel derived from sludge of claim 1, it is characterized in that: described step 1), 5) and 6) add biological deodorizing equipment in the process and carry out deodorizing and handle.
3. by the manufacture method of the described clean fuel derived from sludge of claim 1, it is characterized in that described step 2) in controlled temperature be 26-32 ℃.
4. by the manufacture method of the arbitrary described clean fuel derived from sludge of claim 1-3, it is characterized in that, implement before the described step 1), in the pre-storage tank of mud, inject the water that accounts for mud weight 50% earlier.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200710119840XA CN101289637B (en) | 2007-08-01 | 2007-08-01 | Method for preparing clean fuel derived from sludge |
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| CN200710119840XA CN101289637B (en) | 2007-08-01 | 2007-08-01 | Method for preparing clean fuel derived from sludge |
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| CN101289637A CN101289637A (en) | 2008-10-22 |
| CN101289637B true CN101289637B (en) | 2011-07-27 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101684422B (en) * | 2009-06-24 | 2013-07-10 | 何少海 | Environmentally-friendly sludge solid fuel and preparation method thereof |
| CN101955310B (en) * | 2009-07-20 | 2012-10-10 | 浙江绿治污泥处理技术有限公司 | Sludge dewatering method and special oven thereof |
| CN102942978B (en) * | 2012-11-21 | 2014-04-30 | 包晓东 | Manufacturing method of sludge biomass fuel |
| CN104058563B (en) * | 2014-07-03 | 2016-09-14 | 容文钰 | Mud is converted into the processing equipment system and method for building materials |
| CN105296049B (en) * | 2015-11-04 | 2017-10-31 | 孙立朋 | A kind of preparation method of sewage sludge biomass fuel |
| CN105502884B (en) * | 2015-12-07 | 2018-07-13 | 章亮庄 | A kind of mud dewatering method of high efficiency, low cost |
| CN110272173A (en) * | 2019-06-25 | 2019-09-24 | 安徽理工大学 | A kind of processing method of sludge |
| CN111253991A (en) * | 2020-03-27 | 2020-06-09 | 刘国庆 | Biomass fuel processing method and processing system |
| CN111778081A (en) * | 2020-07-16 | 2020-10-16 | 唐山益众废弃物处理有限公司 | Sludge aerobic fermentation residue type carbon and preparation method thereof |
| TWI780585B (en) * | 2021-01-28 | 2022-10-11 | 友達光電股份有限公司 | Method and system for recycling organic sludge as resource |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1282781A (en) * | 1999-07-29 | 2001-02-07 | 中国科学院广州能源研究所 | Process for preparing briquettes with sludge |
| CN1285392A (en) * | 1999-08-24 | 2001-02-28 | 秦泰君 | Solid fuel and process for preparing the same |
| JP2003305500A (en) * | 2002-04-15 | 2003-10-28 | National Institute Of Advanced Industrial & Technology | Method for treating organic sludge |
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- 2007-08-01 CN CN200710119840XA patent/CN101289637B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1282781A (en) * | 1999-07-29 | 2001-02-07 | 中国科学院广州能源研究所 | Process for preparing briquettes with sludge |
| CN1285392A (en) * | 1999-08-24 | 2001-02-28 | 秦泰君 | Solid fuel and process for preparing the same |
| JP2003305500A (en) * | 2002-04-15 | 2003-10-28 | National Institute Of Advanced Industrial & Technology | Method for treating organic sludge |
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Denomination of invention: Method for preparing clean fuel derived from sludge Effective date of registration: 20121030 Granted publication date: 20110727 Pledgee: Zhuhai Huarun bank Limited by Share Ltd. Pledgor: Rong Wenyu Registration number: 2012990000652 |
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