CN103436318B - Technique for preparing derived fuel from municipal sludge and biomass - Google Patents

Technique for preparing derived fuel from municipal sludge and biomass Download PDF

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Publication number
CN103436318B
CN103436318B CN201310411722.1A CN201310411722A CN103436318B CN 103436318 B CN103436318 B CN 103436318B CN 201310411722 A CN201310411722 A CN 201310411722A CN 103436318 B CN103436318 B CN 103436318B
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biomass
broken
essence
additive
sludge
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CN103436318A (en
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吕勇
黄长秀
郭起桓
吴桥生
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Guilin Juneng Environmental Protection Technology Co ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/10Biofuels, e.g. bio-diesel
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel

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Abstract

The invention discloses a technique for preparing derived fuel from municipal sludge and biomass, which is an energy-saving and efficient industrialized preparation technique. The technique comprises the following steps: previously baking or dehydrating the main component municipal sludge, proportionally adding biomass and additives, carrying out crushing, stirring and drying twice on the mixture by a fine crushing-stirring-molding integrated machine to sufficiently pulverize the biomass, and thoroughly mixing the sludge with the biomass and additives to perform modification treatment; and carrying out extrusion molding on the sludge by a molding machine by using the viscosity of the sludge, and finally delivering to a low-temperature drier to carry out baking. The invention achieves the goals of energy saving and zero discharge in the production process.

Description

With municipal sludge and the biomass-making technique for derivatived fuel
Technical field
The present invention relates to the treatment process of municipal sludge and biomass, specifically a kind of with municipal sludge and biomass for the technique of derivatived fuel prepared by raw material.
Background technology
With municipal sludge and the biomass-making technique for derivatived fuel, existing a lot of research, but rarely seenly there is treating processes industrialization person both at home and abroad.Trace it to its cause, mainly cannot go beyond following generally acknowledged technical barrier:
A difficult problem one: sludge dewatering is difficult.Be all generally adopt filter press technique or dewater with folded spiral shell machine now, the moisture percentage in sewage sludge dispatched from the factory is general all more than 80%.Use mechanical means to reduce its water ratio and mainly contain following two kinds of methods: one is strengthen flocculation agent input amount, causes processing cost to improve; Two is the operating pressure strengthening pressure filter, and extend the dwell time of pressure filter, this can cause the sludge treatment ability of every day to decline.
A difficult problem two: drying sludge is difficult.A population is in the city of about 300,000, and the sludge quantity that the mud that every day produces leaches after treatment is at about 20 tons.The moisture percentage in sewage sludge emitted from sewage work is about 80%, and the existing water content utilizing municipal sludge to prepare the technical requirements mud of derivatived fuel is generally below 50%.Become water vapor by 1 kg of water and need power consumption 1 degree calculating, it is (80%-50%) × 20 ton × 1000 KWhs/ton=6000 degree/sky that transpiring moisture needs to consume electric energy, and the energy consumption that direct baking needs seems not high.But direct baking is unfeasible, because the composition of municipal sludge is complicated, be thick sludge mixture, its surface has been dried, and inner aqueous rate remains unchanged substantially.We visited the mud that a sludge treatment factory has stacked 3 years, only had top layer air-dry, and inner aqueous rate remains unchanged substantially, stepped down in lightly above mud with pin, were easy to sag.This also demonstrates non-modified process, only by oven dry, natural air drying, sunlight dries is infeasible.
In addition, prior art processes long flow path, equipment is complicated, energy consumption is high, and productivity is low, restricts its industrialized development.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, and propose a kind of with municipal sludge and the biomass-making technique for derivatived fuel, is a kind of industrialization preparation technology of efficient energy-saving.
The technical scheme realizing the object of the invention is:
With municipal sludge and biomass-making for a technique for derivatived fuel, comprise following operation:
(1) biomass raw breaks operation: with crusher, biomass material is carried out the fragmentation of thick level;
Described biomass material is fast-growing bamboo, plant straw, branch, tree root etc. mainly.
(2) biomass thin broken operation: send upper operation here biomass material with crusher and carry out the fragmentation of thin level;
After the fragmentation of this operation, the biomass material size of 90% is at 15mm × below 10mm.
(3) essence broken, stir, drying process: biomass material thin broken operation transported by constant feeder, screw machine are sent here mud, additive 1 and are sent into essence broken stirring dry integrated machine in proportion and carry out meticulous fragmentation, whip modified, drying treatment;
Sheng Wu Zhi ︰ Wu Ni ︰ additive 1=0.5 ︰ 1 ︰ 0.15 ~ 0.25;
Described additive is by weight percentage, the iron protochloride of 10% ~ 20%, the Potcrate of 5.5% ~ 12%, the potassium perchlorate of 5.5% ~ 12%, saltpetre, 5.5% ~ 12% sodium carbonate, the coking coal powder of 40% ~ 60%, the chlorinated lime of 8% ~ 15% of 5.5% ~ 12%, total amount 100% forms;
The broken dry integrated machine working temperature that stirs of essence is at 160 DEG C ~ 200 DEG C.
(4) secondary fine broken, stir, drying process: by the long distance delivery of the mixture of upper operation by 20-30 rice, allow the spontaneous evaporation under the effect of waste heat of more moisture content, then by constant feeder, biomass material, additive 1 are sent into the broken dry integrated machine that stirs of essence in the ratio of upper operation and carried out secondary fine fine crushing, whip modified, drying treatment;
The broken dry integrated machine working temperature that stirs of essence is at 160 DEG C ~ 200 DEG C.
(5) essence broken, stir, molding procedure: by the long distance delivery of the mixture of upper operation by 20-30 rice, allow the spontaneous evaporation under the effect of waste heat of more moisture content, then pressed by constant feeder that 3% ~ 5% dispensing mixed additive 2 to essence of supplied materials weight is broken stirs forming integrated machine extrusion moulding;
Described additive 2 is by weight percentage, 5 ~ 10% sodium bicarbonate, 90 ~ 95% Industrial Salts, and total amount is 100% mixing composition;
The broken forming integrated machine working temperature that stirs of essence, at 30 ~ 50 DEG C, affects shaping to avoid sodium bicarbonate to decompose carbon dioxide gas.Its power is 37 ~ 55KW, and production capacity is 6 ~ 10T/H.
(6) cryodrying operation: the shaped fuel of upper operation is delivered to the low-temperature drier inner drying 50-70 minute that temperature is 80-180 DEG C, namely completes the preparation process of derivatived fuel.
This operation low-temperature drier used, power is 180-220KW, and production capacity is 6 ~ 10T/H.The dry water vapor produced carries out filtration treatment by smoke eliminator, is discharged in air after up to standard.
Derivatived fuel calorific value after synthesis is at 3800 ~ 4500 kilocalories.
Sodium bicarbonate in described additive 2 because being heated carbon dioxide gas and on shaped fuel surface, inner form many fine and close apertures, accelerate moisture loss and be beneficial to the burning of derivatived fuel.Make its water ratio be down to less than 30% fast after cryodrying, ensure its transport or stacking process in can not fall apart, broken.
Described operation (1), (2) adopt rotating speed to be that the low speed of 20-35r/min is to rolling shear crusher.
Remarkable advantage of the present invention is:
1. be proven, the requirement of high speed disintegrator to cutter material is high, and cutter easily damages.Thick, thin broken operation crusher used of the present invention is all select rotating speed to be 20-35r/min.Low speed, to rolling shearing-crushing, protects crushing cutter effectively, its work-ing life is extended widely, reduces production cost.
2. without the need to changing the existing sewage treatment process of sewage work.At present, after sewage work's process the water ratio of mud about 80%.If will reduce its water ratio further, conventional method to strengthen the consumption of flocculation agent.The viscosity of like that both broken mud again reduces its calorific value, unfavorable to molding procedure on the contrary.
3. whole production process is without the need to carrying out processed or baking processing to the mud that sewage work produces in advance again, in thorough solution derived from sludge preparation of fuel process, energy consumption is too high, big for environment pollution or produce the problem of secondary pollution, really achieves the target of production process zero release.
4. the viscosity that make use of mud achieves shaping.As long as the water ratio of mixture can be shaping 45% ~ 60%, significantly reduce the difficulty of production technique, achieve energy-conservation.
5. economic benefit clearly.In mud, add the biomass of thin broken, both make use of mud lubrication, make again the biomass after fragmentation fully mix with mud, destroy the primary structure of mud, make its modification, contribute to the evaporation of moisture.By broken for essence, stir, dryly, shaping be integrated in one, shorten technical process, improve shaping efficiency, reduce production cost.
6. toast low cost.Use low-temperature drier to carry out finished product successive drying, dry amount per hour reaches 6 ~ 10 tons, power consumption 180KW per hour, and the dry expense of finished product is less than 35 yuan/ton.Because sodium bicarbonate decomposes release of carbon dioxide in drying process, accelerate moisture loss and be beneficial to the burning of derivatived fuel.
7. whole production process is very simple, efficient.Enter production line to producing product from raw material, whole process, less than 2 hours, realizes mud and collected the target that can complete process on the same day same day.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
With high humidity municipal sludge and biomass-making for a technique for derivatived fuel, comprise following operation:
(1) biomass raw breaks operation: with crusher, biomass material is carried out the fragmentation of thick level.
Described biomass material is fast-growing bamboo, plant straw, branch, tree root etc. mainly.
The SSI-M50E type crusher of American SS I company selected by thick broken machine.Its rotating speed is 26r/min; Crushing cutter thickness is 50mm.Breaking capacity is 15T/H.
(2) biomass thin broken operation: send upper operation here biomass material with crusher and carry out the fragmentation of thin level.
After the fragmentation of this operation, the biomass material size of 90% is at 15mm × below 10mm.
The SSI-M50E type crusher of American SS I company selected by thin broken machine.Its rotating speed is 26r/min; Crushing cutter thickness is 15mm.Breaking capacity is 10T/H.
(3) essence broken, stir, drying process: biomass material thin broken operation transported by constant feeder, screw machine are sent here mud, additive 1 and are sent into essence broken stirring dry integrated machine in proportion and carry out meticulous fragmentation, whip modified, drying treatment.
Sheng Wu Zhi ︰ Wu Ni ︰ additive 1=0.5 ︰ 1 ︰ 0.15 ~ 0.25.
Described additive is by weight percentage, the iron protochloride of 10% ~ 20%, the Potcrate of 5.5% ~ 12%, the potassium perchlorate of 5.5% ~ 12%, saltpetre, 5.5% ~ 12% sodium carbonate, the coking coal powder of 40% ~ 60%, the chlorinated lime of 8% ~ 15% of 5.5% ~ 12%, total amount 100% forms;
The broken dry integrated machine working temperature that stirs of essence is at 160 DEG C ~ 200 DEG C.
(4) secondary fine broken, stir, drying process: by the long distance delivery of the mixture of upper operation by 20-30 rice, allow the spontaneous evaporation under the effect of waste heat of more moisture content, then by constant feeder, biomass material, additive 1 are sent into the broken dry integrated machine that stirs of essence in the ratio of upper operation and carried out secondary fine fine crushing, whip modified, drying treatment.
The broken dry integrated machine working temperature that stirs of essence is at 160 DEG C ~ 200 DEG C.
Adopt the JJC250 type essence broken stirring dry integrated machine of independent research, rotating speed is 27r/min, and breaking capacity is 10T/H.Adopt two concurrent workings.
(5) essence broken, stir, molding procedure: by the long distance delivery of the mixture of upper operation by 20-30 rice, allow the spontaneous evaporation under the effect of waste heat of more moisture content, then pressed by constant feeder that 3% ~ 5% dispensing mixed additive 2 to essence of supplied materials weight is broken stirs forming integrated machine extrusion moulding.
Additive 2 is by weight percentage, 5 ~ 10% sodium bicarbonate, 90 ~ 95% Industrial Salts, and total amount is 100% mixing composition.
The broken forming integrated machine working temperature that stirs of essence, at 30 ~ 50 DEG C, affects shaping to avoid sodium bicarbonate decomposes carbon dioxide gas.Its power is 37 ~ 55KW, and production capacity is 6 ~ 10T/H.
Adopt the essence broken stirring forming integrated machine JJC200 type machine of independent research, rotating speed is 32r/min, and forming ability is 6 ~ 10T/H.Adopt two concurrent workings.
(6) cryodrying operation: the shaped fuel of upper operation is delivered to the low-temperature drier inner drying 50-70 minute that temperature is 80-180 DEG C, namely completes the preparation process of derivatived fuel.This operation low-temperature drier used, power is 180-220KW, and production capacity is 6 ~ 10T/H.The dry water vapor produced carries out filtration treatment by smoke eliminator, is discharged in air after up to standard.
Cryodrying operation adopts DWHK200 type (patent No. the is ZL2013 2 0077142.9) machine of independent research, and power is 180-220KW, and production capacity is 6 ~ 10T/H.Smoke eliminator adopts the small-sized smoke eliminator (this product emission standard reaches European standard) of JFE company.

Claims (1)

1. with municipal sludge and biomass-making for a technique for derivatived fuel, comprise following operation:
(1) biomass raw breaks operation: with crusher, biomass material is carried out the fragmentation of thick level;
(2) biomass thin broken operation: send upper operation here biomass material with crusher and carry out the fragmentation of thin level;
(3) essence broken, stir, drying process: biomass material thin broken operation transported by constant feeder, screw machine are sent here municipal sludge, additive 1 and are sent into essence broken stirring dry integrated machine in proportion and carry out meticulous fragmentation, whip modified, drying treatment;
Drying temperature is 160 DEG C ~ 200 DEG C;
Sheng Wu Zhi ︰ Cheng city Wu Ni ︰ additive 1=0.5 ︰ 1 ︰ 0.15 ~ 0.25;
Described additive 1 is by weight percentage, the iron protochloride of 10% ~ 20%, the Potcrate of 5.5% ~ 12%, the potassium perchlorate of 5.5% ~ 12%, saltpetre, 5.5% ~ 12% sodium carbonate, the coking coal powder of 40% ~ 60%, the chlorinated lime of 8% ~ 15% of 5.5% ~ 12%, total amount 100% forms;
(4) secondary fine broken, stir, drying process: by the long distance delivery of the mixture of upper operation by 20-30 rice, then by constant feeder, biomass material, additive 1 are sent into the broken dry integrated machine that stirs of essence in the ratio of upper operation and are carried out secondary fine fine crushing, whip modified, drying treatment; Drying temperature is 160 DEG C ~ 200 DEG C;
(5) essence broken, stir, molding procedure: by the long distance delivery of the mixture of upper operation by 20-30 rice, press 3% ~ 5% dispensing additive 2 to the essence broken stirring forming integrated machine extrusion moulding of supplied materials weight by constant feeder;
Described additive 2 is by weight percentage, 5 ~ 10% sodium bicarbonate, 90 ~ 95% Industrial Salts, and total amount is 100% mixing composition;
(6) cryodrying operation: the shaped fuel of upper operation is delivered to the low-temperature drier inner drying 50-70 minute that temperature is 80-180 DEG C, namely completes the preparation process of derivatived fuel.
CN201310411722.1A 2013-09-11 2013-09-11 Technique for preparing derived fuel from municipal sludge and biomass Active CN103436318B (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1740288A (en) * 2004-08-23 2006-03-01 杜丽文 High efficiency coal-saving dusulfurizer
DE102007011782A1 (en) * 2007-03-12 2008-09-18 Conpower Energieanlagen Gmbh & Co. Kg Method for using biomass with which a plant serves as main component for the biomass production, comprises supplying the harvested plant with residual moisture of specified range to fermentation process in bioreactor and then removing
CN101781595A (en) * 2010-03-05 2010-07-21 宁波双翼能源科技有限公司 Production method of solid type fuel
CN102021057A (en) * 2010-11-30 2011-04-20 宁波国海能源科技有限公司 Method for preparing biomass solid molding fuel
CN102086418A (en) * 2011-01-21 2011-06-08 宁波市胜源技术转移有限公司 Combustion-supporting additive for hot briquetting of lignite
CN102212403A (en) * 2011-05-13 2011-10-12 江苏欣法环保科技有限公司 Method and device for preparing formed sludge fuel
CN102465048A (en) * 2010-10-28 2012-05-23 史力 Sludge biomass forming fuel
CN203096018U (en) * 2013-02-19 2013-07-31 吕勇 Complete set of equipment for preparing biomass fuel from sludge and domestic garbage

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1740288A (en) * 2004-08-23 2006-03-01 杜丽文 High efficiency coal-saving dusulfurizer
DE102007011782A1 (en) * 2007-03-12 2008-09-18 Conpower Energieanlagen Gmbh & Co. Kg Method for using biomass with which a plant serves as main component for the biomass production, comprises supplying the harvested plant with residual moisture of specified range to fermentation process in bioreactor and then removing
CN101781595A (en) * 2010-03-05 2010-07-21 宁波双翼能源科技有限公司 Production method of solid type fuel
CN102465048A (en) * 2010-10-28 2012-05-23 史力 Sludge biomass forming fuel
CN102021057A (en) * 2010-11-30 2011-04-20 宁波国海能源科技有限公司 Method for preparing biomass solid molding fuel
CN102086418A (en) * 2011-01-21 2011-06-08 宁波市胜源技术转移有限公司 Combustion-supporting additive for hot briquetting of lignite
CN102212403A (en) * 2011-05-13 2011-10-12 江苏欣法环保科技有限公司 Method and device for preparing formed sludge fuel
CN203096018U (en) * 2013-02-19 2013-07-31 吕勇 Complete set of equipment for preparing biomass fuel from sludge and domestic garbage

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