CN101550373B - Method for preparing biomass massive industrial fuel - Google Patents
Method for preparing biomass massive industrial fuel Download PDFInfo
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- CN101550373B CN101550373B CN2009100720251A CN200910072025A CN101550373B CN 101550373 B CN101550373 B CN 101550373B CN 2009100720251 A CN2009100720251 A CN 2009100720251A CN 200910072025 A CN200910072025 A CN 200910072025A CN 101550373 B CN101550373 B CN 101550373B
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- straw
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- industrial 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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Abstract
A method for preparing biomass massive industrial fuel relates to a method for preparing biomass fuel. The invention settles the problems of low compactness degree, low forming rate, high energy consumption, serious abrasion of production device and mold, low ash fusion point, easy slag bonding and easy ash accumulation in direct burning, device corrosion and inadequate burning in biomass massiveindustrial fuel prepared by prior art in weather of winter when the stalk is used as raw material in northern area of China. The method comprises the following steps: 1. sunning the stalk; 2. crushingthe stalk; 3. stacking the stalk and increasing the temperature, degrading and drying; 4. drying with hot wind for increasing the temperature; 5. doping the biomass forming fuel additive; and 6. extruding for forming. The forming density of biomass massive industrial fuel prepared according to the method of the invention is 0.8-1.2g/cm<3>. The forming rate obtains 95%-97%. The mold is replaced once when 600 tons of biomass massive industrial fuel is produced. The service lifetime of device is prolonged to two times of normal lifetime. The production volume is increased to 1.0-1.2ton/h. The comprehensive energy consumption is less than 75Kw/T. The ash fusion point of prepared biomass massive industrial fuel is increased for more than 250 DEG C, and the combustion efficiency is more than 98%.
Description
Technical field
The present invention relates to a kind of preparation method of biomass fuel.
Background technology
Biomass massive industrial fuel has the transportation of being easy to and storage, easy to use, clean environment firendly, efficiency of combustion advantages of higher, and fossil energies such as alternative coal and oil reduce the dependence to Nonrenewable resources, guarantee national energy security.Straw is because of cheap, the abundant raw material first-selection that becomes biomass massive industrial fuel of raw material sources.
Northern area is China major grain producing area, and the straw resource is very abundant.But because at the many skin depths of the northern area of China straw flesh, sturdy, and water ratio is up to about 40%, is that the biomass massive industrial fuel that raw material adopts prior art (raw material pulverizing → air-dry modified → extrusion molding → cooling packing) to produce winter exists the low (0.5～0.7g/cm of density with the northern area straw therefore
3), ratio of briquetting low (50%～70%), energy consumption height (comprehensive power consumption 90kWh/t), winter can't the quantity-produced problem, and production unit and die wear are serious, cause molding device shortening in work-ing life, failure rate and stopping production significantly to increase servicing time.Be rich in basic metal and muriates such as potassium, sodium in the northern area straw in addition, the ash fusion point of straw solid molding fuel is low, easy slagging scorification, dust stratification and etching apparatus when causing direct combustion, it is insufficient to burn, influence efficiency of combustion and utilization ratio, range of application is narrow, seriously hinders biomass massive industrial fuel and is extensive use of in the northern area of China industrialized development and industrialization.
Summary of the invention
It is that the following biomass massive industrial fuel density for preparing of weather is low in the winter time, ratio of briquetting is low, energy consumption is high for raw material employing prior art with the northern area straw at present that the present invention will solve, winter can't continuous production, production unit and die wear are serious and ash fusion point is low, the easy slagging scorification of direct combustion, dust stratification, etching apparatus, the inadequate problem of burning, and the preparation method of a kind of biomass massive industrial fuel that provides.
One, airing straw to water ratio (quality) is lower than 35%; Two, crushed straw; Three, stacking intensification, degraded are dried to water ratio (quality) and are lower than 30%; Four, warm air drying heats up, and layering blow dried straw to water ratio (quality) is lower than 25%, temperature to 30～60 ℃; Five, in stalk, mix the biomass molding fuel additive by 3%～8% of warm air drying intensification back straw quality, stir; Six, extrusion molding promptly obtains biomass massive industrial fuel.
The biomass molding fuel additive is by weight percentage by 20%～30% Al in the step 5 of the present invention
2O
3, 15%～30% Fe
2O
3Mix composition with 40%～65% kaolin.
The preparation method of biomass massive industrial fuel of the present invention heats up to straw and " the softening processing " by step 3 and step 4, strengthened the adhesive power between straw, reached reduction straw hardness, reduced production unit and die wear, improve output, improved the effect of compact density and ratio of briquetting.
The compact density of the biomass massive industrial fuel that the inventive method is prepared is 0.8～1.2g/cm
3, ratio of briquetting reaches 95%～97%, and mould also by 300 tons of replacings of present production once brings up to 600 tons of replacings once, and the frequency of servicing installation only is present 1/3, stops production and obviously reduces servicing time, is extended for original 2 times the work-ing life of equipment.
The preparation method of biomass massive industrial fuel of the present invention can be at the continuous production in winter, and output rises to 1.0～1.2 tons/h, and comprehensive energy consumption is less than 75kWh/t.
The ash fusion point that the inventive method has improved prepared biomass massive industrial fuel has improved more than 250 ℃, the biomass massive industrial fuel combustionproperty is greatly improved, efficiency of combustion reaches more than 98%, combusting firepower is lasting, slagging scorification, dust stratification do not take place in the fire box temperature height, have reduced the corrosion to combustion equipment, prolong service life of equipment, also widened the range of application of biomass massive industrial fuel.
The present invention can effectively reduce the cost of current combustion biomass massive industrial fuel, saves resource, and provides another approach for the utilization and the development of the northern area of China stalk.
Embodiment
Technical solution of the present invention is not limited to following cited embodiment, also comprises the arbitrary combination between each embodiment.
The present embodiment biomass massive industrial fuel carries out according to the following steps: one, airing straw to water ratio (quality) is lower than 35%; Two, crushed straw; Three, stacking intensification, degraded are dried to water ratio (quality) and are lower than 30%; Four, warm air drying heats up, and layering blow dried straw to water ratio (quality) is lower than 25%, temperature to 30～60 ℃; Five, in stalk, mix the biomass molding fuel additive by 3%～8% of warm air drying intensification back straw quality, stir; Six, extrusion molding promptly obtains biomass massive industrial fuel.
Hot blast temperature is 70～120 ℃ in the present embodiment step 4.
The biomass molding fuel additive is by weight percentage by 20%～30% Al in the present embodiment step 5
2O
3, 15%～30% Fe
2O
3Mix composition with 40%～65% kaolin.The biomass molding fuel additive in combustion processes with straw in an alkali metal salt and muriate generation chemical reaction generate dystectic material, and reduce the volatilization of basic metal and muriatic gas phase simultaneously, reach the raising ash fusion point, reduce dust stratification, slagging scorification, alleviate the combustion equipment corrosion, prolong the combustion equipment effect in work-ing life, and improved fuel availability and efficiency of combustion.
Adopt the present embodiment method to produce, 600 tons of biomass massive industrial fuels of the every production of mould are changed once, and the frequency of servicing installation only be present 1/3, and stopping production obviously reduces servicing time, is extended for original 2 times the work-ing life of equipment.
The compact density of the biomass massive industrial fuel that the inventive method is prepared is 0.8～1.2g/cm
3, and the compact density of prior art only is 0.5～0.7g/cm
3, output rises to 1.0～1.2 tons/h from 0.4～0.6 ton/h, and ratio of briquetting reaches 95%～97%, and comprehensive energy consumption is less than 75kWh/t.
China is vast in territory, and the present embodiment method can be adopted in three provinces in the northeast of China, Xinjiang and Inner Mongolia Autonomous Region.Can adopt the biomass massive industrial fuel of existing various boiler combustion present embodiment preparations.
Embodiment two: the difference of present embodiment and embodiment one is: adopt in the step 1 to ted and the mode airing straw in emphasis airing straw root segment and stage casing.Other step and parameter are identical with embodiment one.
Present embodiment can be with the stacking airing up of straw root.
Embodiment three: present embodiment and embodiment one or twos' difference is: adopt ring mold pressing roll shaper with the straw extrusion molding in the step 6.Other step and parameter are identical with embodiment one or two.
Embodiment four: present embodiment and embodiment one, two or threes' difference is: straw is maize straw, cotton stalk, Chinese sorghum straw or wheat straw.Other step and parameter are identical with embodiment one, two or three.
Embodiment five: the difference of present embodiment and embodiment one to four is: in the step 2 straw is ground into the straw section that length is 1.5～4.5cm.Other step and parameter are identical with embodiment one to four.
Embodiment six: the difference of present embodiment and embodiment one is: the step 4 warm air drying heats up, and layering blow dried straw to water ratio (quality) is lower than 20%, temperature to 40～60 ℃.Other step and parameter are identical with embodiment one.
Embodiment seven: the difference of present embodiment and embodiment one is: the step 4 warm air drying heats up, and layering blow dried straw to water ratio (quality) is lower than 18%, temperature to 50～60 ℃.Other step and parameter are identical with embodiment one.
Embodiment eight: the difference of present embodiment and embodiment one is: the step 4 warm air drying heats up, and layering blow dried straw to water ratio (quality) is lower than 16%, temperature to 55～60 ℃.Other step and parameter are identical with embodiment one.
Embodiment nine: the difference of present embodiment and embodiment one is: the step 4 warm air drying heats up, and layering blow dried straw to water ratio (quality) is lower than 14%, temperature to 60 ℃.Other step and parameter are identical with embodiment one.
Embodiment ten: the present embodiment biomass massive industrial fuel carries out according to the following steps: one, airing corn stalk to water ratio (quality) is 32%～34%; Two, corn stalk is ground into the corn stalk section that length is 2～2.5cm; Three, it is 28%～30% that stacking intensification, degraded are dried to water ratio (quality); Four, warm air drying heats up, and layering blow dried straw to water ratio (quality) is lower than 23%, temperature to 40 ± 2 ℃; Five, in stalk, mix the biomass molding fuel additive by 4% of warm air drying intensification back straw quality, evenly stir with straw raw material; Six, with encircling the mold pressing roller molding machine, promptly obtain biomass massive industrial fuel with the corn stalk extrusion molding.
The biomass molding fuel additive is by weight percentage by 25% Al in the present embodiment step 5
2O
3, 25% Fe
2O
3Mix composition with 50% kaolin.
Present embodiment is implemented in the northern area of China winter.
The overall dimensions of the biomass massive industrial fuel of present embodiment preparation are 32mm * 32mm * (15～60) mm, and compact density is 1.02g/cm
3, water ratio is 12.4%, ratio of briquetting is 96%.
The contrast experiment:
First group: adopt raw material pulverizing → air-dry modified → (with the corn stalk is raw material for the prior art for preparing biomass massive industrial fuel of extrusion molding → cooling packing, it is identical with present embodiment that straw is pulverized size, adopt surplus the artificial airing 10 a day back to pulverize, open-air again seasoning 20～25 days), the biomass massive industrial fuel compact density is 0.52g/cm
3
Second group: adopt present embodiment to prepare biomass massive industrial fuel, the biomass massive industrial fuel compact density is 1.02g/cm
3
The texturing temperature of first group of biomass massive industrial fuel burning back ash is 959 ℃, and efficiency of combustion is 92.4%, has a large amount of slagging scorification to generate in the ash.
The texturing temperature of second group of biomass massive industrial fuel burning back ash is 1220 ℃, and efficiency of combustion is 98.5%, does not have slagging scorification to generate, and records burning back ash content less than 11%.
Simultaneous test data declaration present embodiment can obviously improve biomass massive industrial fuel compact density and ash fusion point, can improve compact density and ratio of briquetting, effectively solves slagging scorification, dust stratification, reaches abundant burning, improves efficiency of combustion, realizes efficient burning.
600 tons of replacings of the every production of present embodiment mould once, output is 1.0 tons/h, comprehensive energy consumption is 70kWh/t.
Embodiment 11: the present embodiment biomass massive industrial fuel carries out according to the following steps: one, airing cotton straw to water ratio (quality) is 31%～33%; Two, the cotton straw is ground into the cotton straw section that length is 3～3.5cm; Three, it is 25%～27% that stacking intensification, degraded are dried to water ratio (quality); Four, warm air drying heats up, and layering blow dried straw to water ratio (quality) is lower than 20%, temperature to 50 ± 2 ℃; Five, in stalk, mix the biomass molding fuel additive by 6% of warm air drying intensification back straw quality, stir; Six, with encircling the mold pressing roller molding machine, promptly obtain biomass massive industrial fuel with the extrusion molding of cotton straw.
The biomass molding fuel additive is by weight percentage by 20% Al in the present embodiment step 5
2O
3, 20% Fe
2O
3Mix composition with 60% kaolin.
Present embodiment is implemented in the northern area of China winter.
The overall dimensions of the biomass massive industrial fuel of present embodiment preparation are 32mm * 32mm * (15～65) mm, and compact density is 0.94g/cm
3, water ratio is 10.6%, ratio of briquetting is 96.6%.
The contrast experiment:
First group: adopt raw material pulverizing → air-dry modified → (with the cotton straw is raw material for the prior art for preparing biomass massive industrial fuel of extrusion molding → cooling packing, it is identical with present embodiment that straw is pulverized size, adopt surplus the artificial airing 10 a day back to pulverize again open-air seasoning 20～25 days), the biomass massive industrial fuel compact density is 0.55g/cm
3
Second group: adopt present embodiment to prepare biomass massive industrial fuel, the biomass massive industrial fuel compact density is 0.94g/cm
3
The texturing temperature of first group of biomass massive industrial fuel burning back ash is 962 ℃, and efficiency of combustion is 92.1%, has a large amount of slagging scorification to generate in the ash.
The texturing temperature of second group of biomass massive industrial fuel burning back ash is 1234 ℃, and efficiency of combustion is 98.7%, does not have slagging scorification to generate, and records burning back ash content less than 12.9%.
Simultaneous test data declaration present embodiment can obviously improve biomass massive industrial fuel compact density and ash fusion point, can improve compact density and ratio of briquetting, effectively solves slagging scorification, dust stratification, reaches abundant burning, improves efficiency of combustion, realizes efficient burning.
600 tons of replacings of the every production of present embodiment mould once, output is 1.1 tons/h, comprehensive energy consumption is 72kWh/t.
Embodiment 12: the present embodiment biomass massive industrial fuel carries out according to the following steps: one, airing Chinese sorghum straw to water ratio (quality) is 32%～33%; Two, the Chinese sorghum straw is ground into the Chinese sorghum straw section that length is 1.5～2cm; Three, it is 25%～26% that stacking intensification, degraded are dried to water ratio (quality); Four, warm air drying heats up, and layering blow dried straw to water ratio (quality) is lower than 22%, temperature to 55 ± 2 ℃; Five, in stalk, mix the biomass molding fuel additive by 5% of warm air drying intensification back straw quality; Six, with encircling the mold pressing roll shaper, promptly obtain biomass massive industrial fuel with the extrusion molding of Chinese sorghum straw.
Present embodiment is implemented in the northern area of China winter.
The biomass molding fuel additive is by weight percentage by 30% Al in the present embodiment step 5
2O
3, 15% Fe
2O
3Mix composition with 55% kaolin.
The overall dimensions of the biomass massive industrial fuel of present embodiment preparation are 32mm * 32mm * (15～50) mm, and compact density is 1.01g/cm
3, water ratio is 12.5%, ratio of briquetting is 96.2%.
The contrast experiment:
First group: adopt raw material pulverizing → air-dry modified → (with the Chinese sorghum straw is raw material for the prior art for preparing biomass massive industrial fuel of extrusion molding → cooling packing, it is identical with present embodiment that straw is pulverized size, adopt surplus the artificial airing 10 a day back to pulverize again open-air seasoning 20～25 days), the biomass massive industrial fuel compact density is 0.62g/cm
3
Second group: adopt present embodiment to prepare biomass massive industrial fuel, the biomass massive industrial fuel compact density is 1.01g/cm
3
The texturing temperature of first group of biomass massive industrial fuel burning back ash is 957 ℃, and efficiency of combustion is 92.0%, has a large amount of slagging scorification to generate in the ash.
The texturing temperature of second group of biomass massive industrial fuel burning back ash is 1232 ℃, and efficiency of combustion is 98.2%, does not have slagging scorification to generate, and records burning back ash content less than 12.8%.
Simultaneous test data declaration present embodiment can obviously improve biomass massive industrial fuel compact density and ash fusion point, can improve ratio of briquetting, effectively solves slagging scorification, dust stratification, reaches abundant burning, improves efficiency of combustion, realizes efficient burning.
600 tons of replacings of the every production of present embodiment mould once, output is 1.2 tons/h, comprehensive energy consumption is 72kWh/t.
Embodiment 13: the present embodiment biomass massive industrial fuel carries out according to the following steps: one, airing wheat straw to water ratio (quality) is 30%～32%; Two, wheat straw is ground into the wheat straw section that length is 4～4.5cm; Three, it is 24%～26% that stacking intensification, degraded are dried to water ratio (quality); Four, warm air drying heats up, and layering blow dried straw to water ratio (quality) is lower than 20%, temperature to 50 ± 2 ℃; Five, in stalk, mix the biomass molding fuel additive by 7% of warm air drying intensification back straw quality, stir with straw raw material; Six, with encircling the mold pressing roll shaper, promptly obtain biomass massive industrial fuel with the wheat straw extrusion molding.
The biomass molding fuel additive is by weight percentage by 25% Al in the present embodiment step 5
2O
3, 30% Fe
2O
3Mix composition with 45% kaolin.
Present embodiment is implemented in the northern area of China winter.
The physical dimension of the biomass massive industrial fuel of present embodiment preparation is 32mm * 32mm * (15～40) mm, and compact density is 0.99g/cm
3, water ratio 14.1%, ratio of briquetting are 95.3%.
The contrast experiment:
First group: adopt raw material pulverizing → air-dry modified → (with the wheat straw is raw material for the prior art for preparing biomass massive industrial fuel of extrusion molding → cooling packing, it is identical with present embodiment that straw is pulverized size, adopt surplus the artificial airing 10 a day back to pulverize again open-air seasoning 20～25 days), the biomass massive industrial fuel compact density is 0.60g/cm
3
Second group: adopt present embodiment to prepare biomass massive industrial fuel, the biomass massive industrial fuel compact density is 0.99g/cm
3
The texturing temperature of first group of biomass massive industrial fuel burning back ash is 955 ℃, and efficiency of combustion is 92.2%, has a large amount of slagging scorification to generate in the ash.
The texturing temperature of second group of biomass massive industrial fuel burning back ash is 1235 ℃, and efficiency of combustion is 98.5%, does not have slagging scorification to generate, and recording burning back ash content is 11.9%.
Simultaneous test data declaration present embodiment can obviously improve biomass massive industrial fuel compact density and ash fusion point, can improve ratio of briquetting, effectively solves slagging scorification, dust stratification, reaches abundant burning, improves efficiency of combustion, realizes efficient burning.
600 tons of replacings of the every production of present embodiment mould once, output is 1.1 tons/h, comprehensive energy consumption is 71kWh/t.
Claims (5)
1. the preparation method of a biomass massive industrial fuel, it is characterized in that biomass massive industrial fuel carries out according to the following steps: one, airing straw to water ratio (quality) is lower than 35%; Two, crushed straw; Three, stacking intensification, degraded are dried to water ratio (quality) and are lower than 30%; Four, warm air drying heats up, and layering blow dried straw to water ratio (quality) is lower than 25%, temperature to 30～60 ℃; Five, in stalk, mix the biomass molding fuel additive by 3%～8% of warm air drying intensification back straw quality, stir; Six, extrusion molding promptly obtains biomass massive industrial fuel; Wherein, the additive of biomass molding fuel described in the step 5 is by weight percentage by 20%～30% Al
2O
3, 15%～30% Fe
2O
3Mix composition with 40%～65% kaolin.
2. the preparation method of a kind of biomass massive industrial fuel according to claim 1 is characterized in that adopting in the step 1 tedding and the mode airing straw in emphasis airing straw root segment and stage casing.
3. the preparation method of a kind of biomass massive industrial fuel according to claim 1 and 2 is characterized in that adopting in the step 6 ring mold pressing roll shaper with the straw extrusion molding.
4. the preparation method of a kind of biomass massive industrial fuel according to claim 3 is characterized in that straw is maize straw, cotton stalk, Chinese sorghum straw or wheat straw.
5. according to the preparation method of claim 1,2 or 4 described a kind of biomass massive industrial fuels, it is characterized in that in the step 2 straw is ground into the straw section that length is 1.5～4.5cm.
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| CN2009100720251A CN101550373B (en) | 2009-05-13 | 2009-05-13 | Method for preparing biomass massive industrial fuel |
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|---|---|---|---|
| CN2009100720251A CN101550373B (en) | 2009-05-13 | 2009-05-13 | Method for preparing biomass massive industrial fuel |
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| CN101550373B true CN101550373B (en) | 2010-10-20 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102344843A (en) * | 2010-08-03 | 2012-02-08 | 尚征 | Crop straw briquettes fuel production line |
| CN101892108A (en) * | 2010-08-19 | 2010-11-24 | 福建泰和木业有限公司 | Production process of environmental-protection plant energy particle fuel |
| CN102041130A (en) * | 2010-12-27 | 2011-05-04 | 华东理工大学 | Method for improving biomass ash fusion point |
| CN102627990A (en) * | 2012-04-05 | 2012-08-08 | 徐玉丰 | Preparation method of biomass fuel |
| CN103060045A (en) * | 2013-01-17 | 2013-04-24 | 云南省烟草公司大理州公司 | Method for preparing high-density biomass fuel for roasting tobacco by tobacco stalks |
| CN103666626B (en) * | 2013-12-05 | 2016-03-02 | 叶杰珍 | A kind of anti-sintering biomass fuel pellet and preparation method thereof |
| CN103756746B (en) * | 2014-01-03 | 2015-07-08 | 上海环境工程设计研究院有限公司 | Preparation method of mobile straw granular fuel |
| CN105176622A (en) * | 2015-09-08 | 2015-12-23 | 吉林省一鑫生物质新能源发展有限公司 | Straw fuel solid forming method |
| CN106190398A (en) * | 2016-07-26 | 2016-12-07 | 安徽香杨林业有限公司 | A kind of production technology of biomass fuel |
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| DE2361091A1 (en) * | 1973-08-28 | 1975-03-27 | Geb Baykam Mueyesser Goerguen | Additives for producing smokeless coal-dust briquettes - comprising iron cpds., plastics, or minerals and asphalt |
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