CN104479783A - Forming method of biomass fuel - Google Patents

Forming method of biomass fuel Download PDF

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Publication number
CN104479783A
CN104479783A CN201410700009.3A CN201410700009A CN104479783A CN 104479783 A CN104479783 A CN 104479783A CN 201410700009 A CN201410700009 A CN 201410700009A CN 104479783 A CN104479783 A CN 104479783A
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CN
China
Prior art keywords
straw
forming
heating
biomass fuel
wood chip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410700009.3A
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Chinese (zh)
Inventor
沈国俭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHANGSHU XIEXIN METALLURG MATERIAL Co Ltd
Original Assignee
CHANGSHU XIEXIN METALLURG MATERIAL Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to CN201410700009.3A priority Critical patent/CN104479783A/en
Publication of CN104479783A publication Critical patent/CN104479783A/en
Pending legal-status Critical Current

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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

Abstract

The invention discloses a forming method of a biomass fuel, and belongs to the technical field of processing of biomass fuels. The forming method comprises the following steps: in parts by weight, weighing 40-60 parts of wood shavings, 20-30 parts of wheat straw and 20-30 parts of straw, sieving the wood shavings and crushing the wheat straw and the straw, and then mixing the sieved wood shavings with the crushed wheat straw and straw to obtain a raw material; atomizing and wetting the raw material, and controlling the water content of the raw material to obtain a wetted material; pouring the obtained wetted material in a first microwave heating device and carrying out primary heating, and controlling the temperature of primary heating to obtain a primarily-heated material; pouring the primarily-heated material in a second microwave heating device and carrying out secondary heating to obtain a material to be pressed; pouring the material to be pressed in a press-forming device and pressing, and cutting to obtain the biomass fuel. According to the forming method, an adhesive is not required, and thus pollution can be avoided; the biomass fuel can be formed by pressing with a small pressure, and thus the compaction degree of the press-forming can be increased, the press-forming efficiency is high and the equipment cost is low.

Description

The forming method of biomass fuel
Technical field
The invention belongs to biomass fuel processing technique field, be specifically related to a kind of forming method of biomass fuel.
Background technology
Above mentioned biomass fuel mainly refers to wood chip, wheat straw and straw, and people are accustomed to claiming this fuel to be bioenergy or claiming the renewable energy resources.
Along with the minimizing day by day of the such as Nonrenewable energy resources of coal, oil and natural gas and ocean ice and so on; and price constantly rises; and along with the mankind are to the continuous enhancing of environmental protection consciousness, be given a cold shoulder in the past and often not markon's land used obtained unprecedented attention by the aforementioned biological matter fuel of committing to the flames.According to China's agricultural authoritative department statistics, China only year quantum of output of farm crop as paddy and wheat, jowar, corn, cotton and soybean stalk is about about 8.5 hundred million tons, with the acquisition coefficient calculations of 90% to 95%, 7.65-8.075 hundred million tons can be obtained, be equivalent to obtain 3.8-4.04 hundred million tons of standard coals (energy equivalence of 1 ton of stalk is in 0.5 ton of standard coal).So-called standard coal is called for short mark coal, and according to CNS GB2589-81, the calorific value of every kilogram of mark coal is 29271 kilojoules (namely 7000 kilocalories).
From the above, effectively utilize biomass fuel, not only can reduce the consumption to natural resources, and there is economy and the feature of environmental protection.Because the tap density of straw is lower, give to collect, transport and store and apply and bring certain difficulty, thus usually need be shaped to solid, use and improve energy resource density and calorific value, after shaping, volume can be contracted to more than 8 times, and density reaches 1.1-1.4 ton/m 3, energy resource density is equivalent to medium bituminous coal degree.
Because straw wheat straw as the aforementioned, straw etc. are containing certain Mierocrystalline cellulose and xylogen, and xylogen is the structures alone in material, is the macromolecular compound of benzene propane, has the effect strengthening cell walls and cellulose-binding.Xylogen belongs to noncrystal, major portion is insoluble to usual vehicle at normal temperatures, there is no fusing point, but have softening temperature, when temperature reaches certain value, xylogen softens cohesive force and increases, and under certain pressure effect, make its cellulosic molecule roll into a ball dislocation, distortion and extend, inner adjacent biological particles carries out bridle joint mutually, reconfigures and forms blocks.
In published Chinese patent literature, technical scheme about biomass fuel forming reaches 100 remainders, typically as the biological substance fuel forming machine of utility model patent Authorization Notice No. CN201030648Y recommendation, adopt squeegee roller by by hopper the material be fed in round mould clamp-on the entrance of mould, that is by squeegee roller, the dies cavity of material press-in circle mould is formed solid, specifically can be capable see Instructions Page 3 7-15.This patent formula rolls principle with the mode of rolling or title and obtains biomass solid fuel in fact.
The forming machine for straw in biomass that CN201205759Y provides by be configured in the closely knit feeding unit of roll extrusion on tow tractor into and out of material roller and realizing biomass straw compacting by rolling into and out of the Rolling roller between material roller, specifically can see the embodiment of the specification sheets page 4 of this patent.
The forage grass straw briquetting forming machine that CN201456417U discloses is applicable to the herbage briquetting to herding.The rolling-type straw forming machine that CN201415498Y discloses and CN201415499Y(system CN201415498Y same applicant application) disclosed straw rolling-type forming machine be all utilize roll extrusion and the aforesaid mode processing biological that rolls solid-fuelled.In addition, the biological straw forming machine of CN201442359U instruction utilizes pinch roller roll extrusion and processing biological fuel too.
Although it is shaping that forming machine involved by above-mentioned patent formula can meet biomass straw, but roll or roll extrusion mode owing to all adopting, therefore obtained solid-fuelled degree of compactness is difficult to ensure, easily broken in the links such as transport and storage, and can calorific value be affected to a certain extent due to degree of compactness difference.
As the industry's knowledge of the reason, cylindrical biomass solid fuel not only has the high and not easily cracking (loose) of degree of compactness and easily transport and the strong point that stores, and there is the good advantage of calorific value, the biomass fuel of this geometric shape (shape) can only adopt extrusion machinery to obtain usually, and " biological substance fuel forming machine " that Authorization Notice No. CN102205664B introduces meets this requirement.
If above-mentioned patent is for molding device, patent formula is so then propose for concrete forming method, as CN102021059B bulletin has " a kind of forming method utilizing quick thermal treatment process modified biomass fuel ", although this patent formula has the technique effect that its specification sheets is recorded, but because needs add binding agent, thus not only increase cost, and easily produce pollution.
In order to avoid producing pollution because adding binding agent, thus industry is no lack of the mode of employing interpolation silicon bath soil, clay and/or coal dust to biomass fuel forming, typically as " a kind of biomass fuel forming method " of application for a patent for invention publication No. CN101812346A announcement, the method is owing to the addition of abiotic matter composition, thus not only calorific value is had a strong impact on, and shaping loose, ash content is large.
In addition, frictional heating compression moulding and the rear briquetting process of fermentation are also once by industry is pursued, but the former exists, and power consumption is large, forming composition center is loose, time easily splits and the shortcoming larger to the destructiveness of molding device for a long time; It is large and be difficult to obtain the formed body of solid (closely knit) to there is calorific value loss in the latter, in view of this factor, and compression moulding all place's state of stopping figthing at present after friction compression moulding and fermentation.
For above-mentioned prior art, the applicant has done lasting and useful exploration and has carried out the experiment repeatedly of non-limited number of times, finally defines technical scheme described below.
Summary of the invention
Task of the present invention is to provide a kind of and helps avoid pollution, be conducive to ensureing calorific value, be of value to the solid effect and having of promoting formed body is convenient to improve shaping efficiency and the forming method reducing the biomass fuel of equipment cost.
Task of the present invention has been come like this, and a kind of forming method of biomass fuel, comprises the following steps:
A) material choice, takes wood chip 40-60 part, wheat straw 20-30 part and straw 20-30 part by weight, and first sieves to wood chip, and pulverizes wheat straw and straw, then the wheat straw of the wood chip sieved, pulverizing and straw three is mixed, and obtains raw material;
B) wetting, to by steps A) atomizing raw materials that obtains soaks, and controls the water ratio of raw material, obtains moistening material;
C) once heating, by by step B) moistening material that obtains drops in the first microwave heating installation and once heats, and control the temperature that once heats, once heated material;
D) second-heating, will by step C) carry out second-heating in once heating material input second microwave heating installation that obtains, and control the temperature of second-heating, obtain material to be pressed;
E) suppress, will by step D) material to be pressed that obtains drops into compression molding device compacting, after cutting, obtain biomass fuel.
In a specific embodiment of the present invention, steps A) described in wood chip sieved refer to that sieve cut-off footpath is less than the wood chip material of 1 ㎝; Described pulverizing wheat straw and straw wheat straw and rice straw powder is broken to length be less than 1 ㎝.
In another specific embodiment of the present invention, the content of lignin of described wood chip is 28%, and ash oontent is 0.5%; The content of lignin of described wheat straw is 22%, and ash oontent is 6%; The content of lignin of described straw is 12%, and ash oontent is 14%.
In another specific embodiment of the present invention, the calorific value of described wood chip is 16559KJ/kg; The calorific value of described wheat straw is 15374KJ/kg; The calorific value of described straw is 13986KJ/kg.
In another specific embodiment of the present invention, step B) described in the water ratio of control raw material be 14-18% by the moisture control of raw material.
Also have in a specific embodiment of the present invention, step C) described in the temperature that once heats of control be that the temperature once heated is controlled as 115-125 DEG C.
More of the present invention and in a specific embodiment, step D) described in the temperature of control second-heating be that the temperature of second-heating is controlled as 160-170 DEG C.
Technical scheme provided by the invention, owing to have employed microwave heating, thus evokes water molecules strenuous exercise by microwave, make biomass temperature increase fast and make that xylogen is softening, melting and produce viscosity, without the need to using binding agent, can avoid producing and polluting; Because microwave heating can make that xylogen is softening, melting, thus not only can with less pressure compression moulding, and significantly can promote the robustness of compression moulding and compression moulding efficiency is high, equipment cost is low.
Embodiment
Embodiment 1:
A) material choice, take wood chip 60 parts by weight, wheat straw 20 parts and straw 20 parts, and first wood chip is sieved, bar in wood chip and block is mixed in screen out, diameter after wood chip sieves is for being less than 1 ㎝, by bar that sieve screens out when sieving, block utilizes after crushed, adopt pulverizer to be crushed to length to wheat straw and straw and be less than 1 ㎝, by the wood chip sieved, the wheat straw pulverized and straw three mixing, obtain raw material, wherein the content of lignin of wood chip is 28%, ash content is 0.5%, the content of lignin of wheat straw is 22%, ash content is 6%, and the content of lignin of straw is 12%, ash content is 14%, and the calorific value of wood chip is 16559KJ/kg, the calorific value of wheat straw is 15374KJ/kg, and the calorific value of straw is 13986KJ/kg,
B) wetting, by by steps A) raw material that obtains soaks with atomized water spray pattern, and the water ratio controlling raw material is 16%, obtains moistening material;
C) once heating, by by step B) moistening material that obtains drops in the first microwave heating installation and once heats, and biomass are produced softening, the temperature once heated is 115 DEG C, is once heated material;
D) second-heating, will by step C) carry out second-heating in once heating material input second microwave heating installation that obtains, make biomass produce melting and possess viscosity, the temperature of second-heating is 170 DEG C, obtains material to be pressed;
E) suppress, will by step D) material to be pressed that obtains drops into compression molding device compacting, after cutting, obtain biomass fuel.
Embodiment 2:
Only by steps A) in the parts by weight of wood chip change 40 parts into, change the parts by weight of wheat straw and straw into each 30 parts; By step B) in water ratio change 14% into; By step C) in a Heating temperature change 125 DEG C into; By step D) in second-heating temperature change 160 DEG C into.All the other are all with the description to embodiment 1.
Embodiment 3:
Only by steps A) in the parts by weight of wood chip change 50 parts into, change the parts by weight of wheat straw and straw into each 25 parts; By step B) in water ratio change 18% into; By step C) in a Heating temperature change 120 DEG C into; By step D) in second-heating temperature change 165 DEG C into.All the other are all with the description to embodiment 1.

Claims (7)

1. a forming method for biomass fuel, is characterized in that comprising the following steps:
A) material choice, takes wood chip 40-60 part, wheat straw 20-30 part and straw 20-30 part by weight, and first sieves to wood chip, and pulverizes wheat straw and straw, then the wheat straw of the wood chip sieved, pulverizing and straw three is mixed, and obtains raw material;
B) wetting, to by steps A) atomizing raw materials that obtains soaks, and controls the water ratio of raw material, obtains moistening material;
C) once heating, by by step B) moistening material that obtains drops in the first microwave heating installation and once heats, and control the temperature that once heats, once heated material;
D) second-heating, will by step C) carry out second-heating in once heating material input second microwave heating installation that obtains, and control the temperature of second-heating, obtain material to be pressed;
E) suppress, will by step D) material to be pressed that obtains drops into compression molding device compacting, after cutting, obtain biomass fuel.
2. the forming method of biomass fuel according to claim 1, is characterized in that steps A) described in wood chip sieved refer to that sieve cut-off footpath is less than the wood chip material of 1 ㎝; Described pulverizing wheat straw and straw wheat straw and rice straw powder is broken to length be less than 1 ㎝.
3. the forming method of biomass fuel according to claim 1 and 2, it is characterized in that the content of lignin of described wood chip is 28%, ash oontent is 0.5%; The content of lignin of described wheat straw is 22%, and ash oontent is 6%; The content of lignin of described straw is 12%, and ash oontent is 14%.
4. the forming method of biomass fuel according to claim 3, is characterized in that the calorific value of described wood chip is 16559KJ/kg; The calorific value of described wheat straw is 15374KJ/kg; The calorific value of described straw is 13986KJ/kg.
5. the forming method of biomass fuel according to claim 1, is characterized in that step B) described in the water ratio of control raw material be 14-18% by the moisture control of raw material.
6. the forming method of biomass fuel according to claim 1, is characterized in that step C) described in the temperature that once heats of control be that the temperature once heated is controlled as 115-125 DEG C.
7. the forming method of biomass fuel according to claim 1, is characterized in that step D) described in the temperature of control second-heating be that the temperature of second-heating is controlled as 160-170 DEG C.
CN201410700009.3A 2014-11-28 2014-11-28 Forming method of biomass fuel Pending CN104479783A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105586103A (en) * 2015-08-10 2016-05-18 南开大学 Application method of composite solid alkali additive in biomass coal preparation
CN105885986A (en) * 2016-05-12 2016-08-24 安徽省珍云生物能源有限公司 Fuel rod for hot water boiler and preparation method for fuel rod
CN105885985A (en) * 2016-05-12 2016-08-24 安徽省珍云生物能源有限公司 Fuel rod for smelting equipment and preparation method thereof
CN105950248A (en) * 2016-05-12 2016-09-21 安徽省珍云生物能源有限公司 Smokeless and odorless fuel rod and preparation method thereof
RU2628608C1 (en) * 2016-07-01 2017-08-21 Федеральное государственное бюджетное научное учреждение Всероссийский научно-исследовательский институт механизации сельского хозяйства (ФГБНУ ВИМ) Fuel briquettes or granules roduction method
CN107245358A (en) * 2017-04-28 2017-10-13 青岛高智高新科技有限公司 Biomass fuel and preparation method thereof
CN107418645A (en) * 2017-05-19 2017-12-01 合肥龙图腾信息技术有限公司 A kind of biomass fuel of easy-formation and preparation method thereof

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US20060082026A1 (en) * 2002-07-19 2006-04-20 Zhanbin Che Process and a device for shaping the loosen material of raw vegetable matter
CN101508927A (en) * 2009-03-25 2009-08-19 山东省科学院能源研究所 Process for producing biomass pyrolytic carbon granular fuel
CN102250665A (en) * 2011-06-23 2011-11-23 天津市东庄生物能源科技有限公司 Biomass fuel particle and preparation method thereof
CN102716695A (en) * 2012-07-05 2012-10-10 中国科学院广州能源研究所 Biomass molded fuel production raw material water content monitoring and regulating system
CN103331799A (en) * 2013-06-18 2013-10-02 泗阳蓝阳托盘设备科技有限公司 Plant fiber extruder with microwave heating device
CN103950084A (en) * 2014-04-28 2014-07-30 复旦大学 Method for making environment-friendly wood material through microwave shaping of straws

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060082026A1 (en) * 2002-07-19 2006-04-20 Zhanbin Che Process and a device for shaping the loosen material of raw vegetable matter
CN101508927A (en) * 2009-03-25 2009-08-19 山东省科学院能源研究所 Process for producing biomass pyrolytic carbon granular fuel
CN102250665A (en) * 2011-06-23 2011-11-23 天津市东庄生物能源科技有限公司 Biomass fuel particle and preparation method thereof
CN102716695A (en) * 2012-07-05 2012-10-10 中国科学院广州能源研究所 Biomass molded fuel production raw material water content monitoring and regulating system
CN103331799A (en) * 2013-06-18 2013-10-02 泗阳蓝阳托盘设备科技有限公司 Plant fiber extruder with microwave heating device
CN103950084A (en) * 2014-04-28 2014-07-30 复旦大学 Method for making environment-friendly wood material through microwave shaping of straws

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105586103A (en) * 2015-08-10 2016-05-18 南开大学 Application method of composite solid alkali additive in biomass coal preparation
CN105885986A (en) * 2016-05-12 2016-08-24 安徽省珍云生物能源有限公司 Fuel rod for hot water boiler and preparation method for fuel rod
CN105885985A (en) * 2016-05-12 2016-08-24 安徽省珍云生物能源有限公司 Fuel rod for smelting equipment and preparation method thereof
CN105950248A (en) * 2016-05-12 2016-09-21 安徽省珍云生物能源有限公司 Smokeless and odorless fuel rod and preparation method thereof
RU2628608C1 (en) * 2016-07-01 2017-08-21 Федеральное государственное бюджетное научное учреждение Всероссийский научно-исследовательский институт механизации сельского хозяйства (ФГБНУ ВИМ) Fuel briquettes or granules roduction method
CN107245358A (en) * 2017-04-28 2017-10-13 青岛高智高新科技有限公司 Biomass fuel and preparation method thereof
CN107418645A (en) * 2017-05-19 2017-12-01 合肥龙图腾信息技术有限公司 A kind of biomass fuel of easy-formation and preparation method thereof

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