CN102827664A - Synthetic sludge fuel and preparation method thereof - Google Patents
Synthetic sludge fuel and preparation method thereof Download PDFInfo
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- CN102827664A CN102827664A CN2012103396641A CN201210339664A CN102827664A CN 102827664 A CN102827664 A CN 102827664A CN 2012103396641 A CN2012103396641 A CN 2012103396641A CN 201210339664 A CN201210339664 A CN 201210339664A CN 102827664 A CN102827664 A CN 102827664A
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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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- Solid Fuels And Fuel-Associated Substances (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a synthetic sludge fuel and a preparation method thereof. The technical problems of high moisture content of a fuel prepared from water-containing sludge, low utilization rate of the water-containing sludge, high utilization rate of raw coal, disadvantageousness to high consumption of the water-containing sludge and the saving of the raw coal, and high raw coal content, high cost and poor low-carbon environmental performance of the obtained synthetic sludge fuel in the prior art are solved. The synthetic sludge fuel is prepared from 5 to 95 weight percent of sludge with the moisture content of 10 to 98 percent and the balance of combustion improver. Agricultural and forestal residues are effectively utilized, the moisture content of a sludge mixture can be effectively lowered, and the treatment cost of the sludge can be greatly lowered; the sludge fuel can be easily dried; and sulfur can be fixed, a heat value is increased, the utilization rate of the sludge is high, the obtained synthetic sludge fuel is high in heat value, low in cost and high in environmental performance, and has a good combustible working condition, and thus waste is turned into wealth.
Description
Technical field
The present invention relates to a kind of sludge synthetic fuel field, the technology that relates in particular to the formulation ratio of sludge synthetic fuel and the mud that urban industry and domestic life sewage work produce synthesized fuel.
Background technology
The water-containing sludge that the municipal sewage plant produces can be used as the fuel utilization, but it is generally acknowledged, mud just can be processed synthol under lower water ratio, therefore needs to improve the sludge dewatering degree, its complex process, and cost is high; On the other hand; In the proportioning and preparation technology of existing sludge synthetic fuel, the utilization ratio of water-containing sludge is low, and the utilization ratio of raw coal is high; Be unfavorable for the mass consumption water-containing sludge and practice thrift raw coal, the sludge synthetic fuel of acquisition is also big because of raw coal content, the high and low carbocyclic ring guaranteed cost of cost is also relatively poor.
Summary of the invention
The invention provides formulation ratio of a kind of sludge synthetic fuel and preparation method thereof; It is high to have solved the water-in-fuel rate that water-containing sludge is processed in the prior art; The utilization ratio of water-containing sludge is low; The utilization ratio of raw coal is high, is unfavorable for the mass consumption water-containing sludge and practices thrift raw coal, and the sludge synthetic fuel of acquisition is also big because of raw coal content, the technical problem of the high and low carbocyclic ring guaranteed cost of cost difference.
Technical solution of the present invention is:
A kind of sludge synthetic fuel, its special character is: mud and ignition dope water ratio 10～98% are prepared from, and wherein the weight percentage of mud is 5～95%, and all the other are ignition dope.
Above-mentioned ignition dope is one or both in wood chip or the stalk bits.
The weight percentage of above-mentioned mud is preferably 35～65%, and all the other are ignition dope.
The weight percentage of above-mentioned mud more preferably is 40%, and all the other are ignition dope.
The water ratio of above-mentioned mud is that 75-98% is more excellent.
The water ratio of above-mentioned mud is that 55-85% is more excellent.
The preparation method one of sludge synthetic fuel may further comprise the steps:
1] with mud and ignition dope uniform mixing in proportion, wherein the weight percentage of mud is 5～95%.
The preparation method two of sludge synthetic fuel may further comprise the steps:
1] mud of water ratio 75～98% is dried or dried, mix with ignition dope, wherein, the weight percentage of mud is 5～95% before drying or drying.
Among above-mentioned two kinds of preparing methods, if step 1] the products therefrom water ratio is higher than 10%, then also comprises step 2], with step 1] products therefrom oven dry or dry, its water ratio is dropped to below 10%, obtain finished product fuel.
Oven dry is to utilize Industrial Boiler waste heat or the oven dry of artificial heat.
Step 2] also comprise step 1] products therefrom process loose shape or cellular after dry again or dry.
The invention has the advantages that:
(1) effectively utilizes the agricultural residuum; For example wood chip, stalk bits etc., wood chip or stalk bits have water absorbability, can be used as dewatering agent; Add the wood chip or the stalk bits of some amount; Can effectively reduce the water ratio of mud compound, make mud not need deep dehydration just to can be used as fuel, greatly reduce the sludge treatment cost; Simultaneously; Wood chip or stalk bits are with after mud mixes; Wood chip or stalk bits have absorbed the free-water in the mud and formed with wood chip or stalk bits is the small-particle of nuclear surface attachment mud, has changed the mud gel structure, and the moisture of being confined in the mud micelle is discharged; Increased the contact area of mud and air, the mummification of sludge fuel is realized easily; Wood chip or stalk bits are rich in metals ions such as calcium, sodium, can consolidate sulphur; Wood chip or stalk bits have combustibility, not only can be combustion-supporting, and thermal value generally more than 3600-4800kat/kg, can also increase calorific value.Therefore; Wood chip or stalk bits can replace inorganic conditioner such as lime, Youxiaolin, Losantin, also can utilize mud simultaneously in a large number, and the sludge synthetic fuel calorific value of acquisition is high; Cost is low; Turn waste into wealth, combustion conditions and environmental-protecting performance are good, but and lime-ash making cement, material of construction after the burning etc.
(2) preparation method of this sludge synthetic fuel is simple, and is with short production cycle, floor space is little, is beneficial to large-scale production.
(3) this fuel can be used for Industrial Boiler and civilian kitchen range stove, and calorific value is at 3500-4600kal/Kg, and alternative raw coal reduces the use to raw coal, and environmental-protecting performance is superior to raw coal.
Embodiment
Mechanism of the present invention is following: in the sludge synthetic fuel, mud contains a large amount of organism, and the butt fugitive constituent can be done fuel up to 60～70%; But mud comprises a large amount of moisture, and the undressed moisture percentage in sewage sludge of sewage work is generally all 80～98%, and the mud utilization that acts as a fuel needs to reduce moisture content.The mode of dehydration has multiplely, comprises oven dry, dries, mechanical dehydration, adding dewatering agent dewater.
For avoiding the sludge synthetic fuel polluted air, also to tackle mud and carry out deodorizing, germicidal treatment, processing mode can adopt chemical mode or physics mode.Chemical mode promptly adds the stablizer of mud, for example lime etc.; Physics mode comprises oven dry, dries, and utilizes 200 °-350 ° middle high temperature or solar radiation to carry out deodorizing, sterilization, and oven dry can utilize the waste heat of heat power plant; Environmental protection more, save energy, and the efficient of oven dry is higher; The mode of drying length consuming time needs broad place, and efficient is lower.
Wood chip or stalk bits have water absorbability, can be used as dewatering agent; Wood chip or stalk bits are rich in metals ions such as calcium, sodium, can consolidate sulphur; Wood chip or stalk bits have combustibility, not only can be combustion-supporting, and thermal value generally more than 4000kat/kg, can also increase calorific value; Wood chip or stalk bits are with after mud mixes; Wood chip has absorbed the free-water in the mud and formed with the wood chip is the small-particle of nuclear surface attachment mud; Changed the mud gel structure; The moisture of being confined in the mud micelle is discharged, increased the contact area of mud and air, the mummification of sludge fuel is realized easily.Therefore, wood chip or stalk bits can replace inorganic conditioner such as lime, Youxiaolin, Losantin.Therefore increase the combined amount of wood chip or stalk bits, can effectively reduce the water ratio of mud compound, make mud not need deep dehydration just to can be used as fuel, greatly reduced the sludge treatment cost.Wood chip is the forestry residuum, comprise by wood machining residues, various forest zone such as protection forest, scrub growth, fruit tree and the village, by the field, roadside, the other woods in river protect the residue branch of hedge clipper branch, bits foam material after crushed; Scrub growth is caragana microphylla, salix monogolica, cuckoo, ansu apricot, sea-buckthorn, black wattle plant woods; Fruit-bearing forest is apple, pears, peach, apricot woods.The stalk bits are corn stalk, rape straw, cotton bar, soybean straw, kaoliang stalk, wheat straw bits foam material after crushed.
The raw material sources of sludge synthetic fuel: mud is from Xi'an the 3rd water factory's domestic life sewage sludge; Water ratio is 10～98%; Undressed moisture percentage in sewage sludge is higher; Be generally 80-98%, handle the back moisture percentage in sewage sludge below 80% through sewage work, its butt calorific value 3500kal/kg; Ignition dope is selected wood chip, and especially the shrub sea-buckthorn is pulverized the bits material, and calorific value is 4700kal/kg.
The preparation method one of this sludge synthetic fuel:
1] getting weight percentage is 5～95% above-mentioned mud (water ratio 10～98%), and all the other pulverize the bits material for the shrub sea-buckthorn, mix, and the performance index of prepared sludge synthetic fuel are seen table 1, and calorific value is the butt calorific value of fuel in the table 1.
2] with step 1] products therefrom processes and looses shape or make cellular oven dry or dry, and its water ratio is dropped to below 10%, meets national fuel standard requirement, obtains finished product fuel.
Table 1 is merely embodiment, does not contain moisture percentage in sewage sludge complete series, proportioning complete series and synthetic dyestuff product complete series.
Visible by table 1:
Mud for water ratio 98%:
Fuel 1: after itself and the wood chip mixed according to numbering 1-8, the products therefrom water ratio is more than 44%, and its calorific value is below the 4688kal/kg; Rule of thumb, the sludge synthetic fuel water ratio just can self-sustaining burning about 40%; Under this raw materials mix ratio, gained sludge synthetic fuel water ratio is more than 40%, still can not self-sustaining burning; So need its water ratio further be reduced, see above-mentioned steps 2 for details].
Fuel 2: after itself and the wood chip mixed according to numbering 9-12, the products therefrom water ratio is below 39%, and its calorific value is more than the 4684kal/kg; Under this raw materials mix ratio; The sludge synthetic fuel water ratio is below 40%, can self-sustaining burning, but for making sludge synthetic fuel meet national fuel standard requirement; Still need with its oven dry or dry to water ratio 10% and below, still see above-mentioned steps 2].
Fuel 3: after itself and wood chip mixed according to numbering 13-14; The products therefrom water ratio is below 9.8%, and its calorific value is more than the 4697kal/kg, under this raw materials mix ratio; The sludge synthetic fuel water ratio is very low; If expectation makes its water ratio below 10% through the usage quantity that continues the increase wood chip, though also can process fuel, the utilization ratio of mud also decreases.
Mud for water ratio 90%
Fuel 4: after itself and the wood chip mixed according to numbering 1-7, the products therefrom water ratio is more than 45%, and its calorific value is below the 4591kal/kg; Rule of thumb, the sludge synthetic fuel water ratio just can self-sustaining burning about 40%; Under this raw materials mix ratio, gained sludge synthetic fuel water ratio is more than 40%, still can not self-sustaining burning; So need its water ratio further be reduced, see above-mentioned steps 2 for details].
Fuel 5: after itself and the wood chip mixed according to numbering 8-11, the products therefrom water ratio is below 40%, and its calorific value is more than the 4609kal/kg; Under this raw materials mix ratio; The sludge synthetic fuel water ratio is below 40%, can self-sustaining burning, but for making sludge synthetic fuel meet national fuel standard requirement; Still need with its oven dry or dry to water ratio 10% and below, still see above-mentioned steps 2].
Fuel 6: after itself and wood chip mixed according to numbering 12-14; The products therefrom water ratio is below 18%, and its calorific value is more than the 4670kal/kg, under this raw materials mix ratio; The sludge synthetic fuel water ratio is very low; If expectation makes its water ratio below 10% through the usage quantity that continues the increase wood chip, though also can process fuel, the utilization ratio of mud also decreases.
Mud for water ratio 85%
Fuel 7: after itself and the wood chip mixed according to numbering 1-7, the products therefrom water ratio is more than 43%, and its calorific value is below the 4543kal/kg; Rule of thumb, the sludge synthetic fuel water ratio just can self-sustaining burning about 40%; Under this raw materials mix ratio, gained sludge synthetic fuel water ratio is more than 40%, still can not self-sustaining burning; So need its water ratio further be reduced, see above-mentioned steps 2 for details].
Fuel 8: after itself and the wood chip mixed according to numbering 8-11, the products therefrom water ratio is below 38%, and its calorific value is more than the 4569kal/kg; Under this raw materials mix ratio; The sludge synthetic fuel water ratio is below 40%, can self-sustaining burning, but for making sludge synthetic fuel meet national fuel standard requirement; Still need with its oven dry or dry to water ratio 10% and below, still see above-mentioned steps 2].
Fuel 9: after itself and wood chip mixed according to numbering 12-14; The products therefrom water ratio is below 17%, and its calorific value is more than the 4656kal/kg, under this raw materials mix ratio; The sludge synthetic fuel water ratio is very low; If expectation makes its water ratio below 10% through the usage quantity that continues the increase wood chip, though also can process fuel, the utilization ratio of mud also decreases.
Mud for water ratio 80%
Fuel 10: after itself and the wood chip mixed according to numbering 1-6, the products therefrom water ratio is more than 48%, and its calorific value is below the 4423kal/kg; Rule of thumb, the sludge synthetic fuel water ratio just can self-sustaining burning about 40%; Under this raw materials mix ratio, gained sludge synthetic fuel water ratio is more than 40%, still can not self-sustaining burning; So need its water ratio further be reduced, see above-mentioned steps 2 for details].
Fuel 11: after itself and the wood chip mixed according to numbering 7-11, the products therefrom water ratio is below 40%, and its calorific value is more than the 4500kal/kg; Under this raw materials mix ratio; The sludge synthetic fuel water ratio is below 40%, can self-sustaining burning, but for making sludge synthetic fuel meet national fuel standard requirement; Still need with its oven dry or dry to water ratio 10% and below, still see above-mentioned steps 2].
Fuel 12: after itself and wood chip mixed according to numbering 12-14; The products therefrom water ratio is below 16%, and its calorific value is more than the 4643kal/kg, under this raw materials mix ratio; The sludge synthetic fuel water ratio is very low; If expectation makes its water ratio below 10% through the usage quantity that continues the increase wood chip, though also can process fuel, the utilization ratio of mud also decreases.
Mud for water ratio 65%
Fuel 13: after itself and the wood chip mixed according to numbering 1-5, the products therefrom water ratio is more than 42%, and its calorific value is below the 4227kal/kg; Rule of thumb, the sludge synthetic fuel water ratio just can self-sustaining burning about 40%; Under this raw materials mix ratio, gained sludge synthetic fuel water ratio is more than 40%, still can not self-sustaining burning; So need its water ratio further be reduced, see above-mentioned steps 2 for details].
Fuel 14: after itself and the wood chip mixed according to numbering 6-11, the products therefrom water ratio is below 39%, and its calorific value is more than the 4287kal/kg; Under this raw materials mix ratio; The sludge synthetic fuel water ratio is below 40%, can self-sustaining burning, but for making sludge synthetic fuel meet national fuel standard requirement; Still need with its oven dry or dry to water ratio 10% and below, still see above-mentioned steps 2].
Fuel 15: after itself and wood chip mixed according to numbering 12-14; The products therefrom water ratio is below 13%; Its calorific value is below the 4603kal/kg, under this raw materials mix ratio, if expectation makes its water ratio below 10% through the usage quantity that continues the increase wood chip; Though also can process fuel, the utilization ratio of mud also decreases.
Mud for water ratio 60%
Fuel 16: after itself and the wood chip mixed according to numbering 1-4, the products therefrom water ratio is more than 42%, and its calorific value is below the 4120kal/kg; Rule of thumb, the sludge synthetic fuel water ratio just can self-sustaining burning about 40%; Under this raw materials mix ratio, gained sludge synthetic fuel water ratio is more than 40%, still can not self-sustaining burning; So need its water ratio further be reduced, see above-mentioned steps 2 for details].
Fuel 17: after itself and the wood chip mixed according to numbering 5-10, the products therefrom water ratio is below 39%, and its calorific value is more than the 4189kal/kg; Under this raw materials mix ratio; The sludge synthetic fuel water ratio is below 40%, can self-sustaining burning, but for making sludge synthetic fuel meet national fuel standard requirement; Still need with its oven dry or dry to water ratio 10% and below, still see above-mentioned steps 2].
Fuel 18: after itself and wood chip mixed according to numbering 11-14; The products therefrom water ratio is below 18%; Its calorific value is below the 4524kal/kg, under this raw materials mix ratio, if expectation makes its water ratio below 10% through the usage quantity that continues the increase wood chip; Though also can process fuel, the utilization ratio of mud also decreases.
Mud for water ratio 55%
Fuel 19: after itself and the wood chip mixed according to numbering 1-3, the products therefrom water ratio is more than 44%, and its calorific value is below the 3928kal/kg; Rule of thumb, the sludge synthetic fuel water ratio just can self-sustaining burning about 40%; Under this raw materials mix ratio, gained sludge synthetic fuel water ratio is more than 40%, still can not self-sustaining burning; So need its water ratio further be reduced, see above-mentioned steps 2 for details].
Fuel 20: after itself and the wood chip mixed according to numbering 5-10, the products therefrom water ratio is below 39%, and its calorific value is more than the 4086kal/kg; Under this raw materials mix ratio; The sludge synthetic fuel water ratio is below 40%, can self-sustaining burning, but for making sludge synthetic fuel meet national fuel standard requirement; Still need with its oven dry or dry to water ratio 10% and below, still see above-mentioned steps 2].
Fuel 21: after itself and wood chip mixed according to numbering 11-14; The products therefrom water ratio is below 17%; Its calorific value is below the 4505kal/kg, under this raw materials mix ratio, if expectation makes its water ratio below 10% through the usage quantity that continues the increase wood chip; Though also can process fuel, the utilization ratio of mud also decreases.
Mud for water ratio 10%
Fuel 22: after itself and the wood chip mixed according to numbering 1-14, the products therefrom water ratio is below 9.5%, and its calorific value is below the 3566kal/kg, can be used as standard fuel and uses.
To sum up visible, when water ratio one timing of mud, the amount that wood chip uses is many more, and the water ratio of gained sludge synthetic fuel is low more, and fuel value is high more, and the utilization ratio of mud is low more simultaneously; When proportioning one timing, the water ratio of mud is low more, and the water ratio of gained sludge synthetic fuel is low more, and calorific value also can be low more, and cost also can correspondingly reduce.When the weight percentage of mud was 35～65%, the utilization ratio of mud was higher, and fuel value is higher, and the water ratio of fuel is lower, and cost is lower simultaneously, is preferred embodiment.
When ignition dope is selected stalk, stalk calorific value 3656kal/kg, the performance index of gained sludge synthetic fuel are seen table 2; Calorific value is the butt calorific value of fuel in the table 2, it can be seen from the table, and when the weight percentage of mud is 35～60%; The utilization ratio of mud is higher, and fuel value is higher, and the water ratio of sludge synthetic fuel is lower; Cost is lower simultaneously, is preferred embodiment.
The preparation method two of this sludge synthetic fuel:
This method is applicable to the mud of water ratio 75～98%.
1] gets the mud of water ratio 75～98%, dry or dry, pulverize the bits material by ratio of mixture in the table 1 and shrub sea-buckthorn again and mix to water ratio below 70%.
2] if step 1] the products therefrom water ratio is higher than 10%, is made into and looses the shape oven dry or make cellular drying, and its water ratio is dropped to below 10%, meets national fuel standard requirement, obtains finished product fuel.
The performance index of this method gained fuel are identical with table 1, and its cost is relative and preparation method one is higher.
Table 2: the mud of different water cut rate is by the performance index of different blended composition and division in a proportion with stalk mixing gained synthol
Claims (10)
1. sludge synthetic fuel, it is characterized in that: mud and ignition dope water ratio 10～98% are prepared from, and wherein the weight percentage of mud is 5～95%, and all the other are ignition dope.
2. according to the said sludge synthetic fuel of claim 1, it is characterized in that: said ignition dope is one or both in wood chip or the stalk bits.
3. according to claim 1 or 2 said sludge synthetic fuels, it is characterized in that: the weight percentage of said mud is 35～65%, and ignition dope is 35～65%.
4. according to the said sludge synthetic fuel of claim 3, it is characterized in that: the weight percentage of said mud is 40%, and ignition dope is 60%.
5. according to the said sludge synthetic fuel of claim 1, it is characterized in that: the water ratio of said mud is 55-85%.
6. according to the said sludge synthetic fuel of claim 1, it is characterized in that: the water ratio of said mud is 75-98%.
7. adopt the method for the said feedstock production sludge synthetic fuel of claim 1, it is characterized in that: may further comprise the steps: 1] mud and ignition dope is even by the described mixed of claim 1.
8. adopt the method for the said feedstock production sludge synthetic fuel of claim 1, it is characterized in that: may further comprise the steps: 1] mud of water ratio 75～98% is dried or dried, even with ignition dope again by the described mixed of claim 1.
9. according to claim 7 or the 8 said methods that prepare sludge synthetic fuel, it is characterized in that: also comprise step 2], if step 1] the products therefrom water ratio is higher than 10%, with the products therefrom oven dry or dry, its water ratio dropped to below 10%, obtains finished product fuel.
10. according to the said method for preparing sludge synthetic fuel of claim 9, it is characterized in that: said oven dry is to utilize Industrial Boiler waste heat or the oven dry of artificial heat; Or step 2] also comprise products therefrom is processed the shape or cellularly dry or dry of loosing.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105038894A (en) * | 2015-08-18 | 2015-11-11 | 盐城工学院 | Sludge-biomass formed fuel and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115077A (en) * | 2011-01-21 | 2011-07-06 | 重庆创能再生资源有限公司 | Preparation method of biomass sludge synthesized carbon |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102115077A (en) * | 2011-01-21 | 2011-07-06 | 重庆创能再生资源有限公司 | Preparation method of biomass sludge synthesized carbon |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105038894A (en) * | 2015-08-18 | 2015-11-11 | 盐城工学院 | Sludge-biomass formed fuel and preparation method thereof |
| CN105038894B (en) * | 2015-08-18 | 2018-08-03 | 盐城工学院 | A kind of sludge-biomass molding fuel and preparation method thereof |
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