CN103450962B - Production technique of pure cedar biomass granular fuel - Google Patents

Production technique of pure cedar biomass granular fuel Download PDF

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Publication number
CN103450962B
CN103450962B CN201310415532.7A CN201310415532A CN103450962B CN 103450962 B CN103450962 B CN 103450962B CN 201310415532 A CN201310415532 A CN 201310415532A CN 103450962 B CN103450962 B CN 103450962B
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cypress
mixture
finished
ratio
sawdust
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CN201310415532.7A
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CN103450962A (en
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李庆文
岳衡
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蓬溪县天桥木业有限公司
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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 relates to a production technique of a pure cedar biomass granular fuel, which comprises the following steps: screening cedar sawdust, mixing materials, drying, cooling, carrying out secondary mixing on the mixture and cedar shavings, and granulating to obtain the finished product. The technique provided by the invention has the advantages of simpleness, less generated dust, high forming ratio and high yield; and the prepared biomass granular fuel has the advantages of high heating value, low slagging tendency, wide raw material resources and low production cost.

Description

Pure cypress biomass granule fuel production technique
Technical field
The present invention relates to a kind of biomass granule fuel preparation technology, relate in particular to a kind of production technique of pure cypress biomass granule fuel.
Background technology
Conventional fuel is mostly that coal, oil, coal gas are main, and these resources are all Nonrenewable resources, are unfavorable for environmental protection, are also unfavorable for the strategy of China's sustainable development.The granular fuel that utilizes discarded reproducible waste material to make is biomass granule fuel, not only energy-conserving and environment-protective of biomass granule fuel, thermal value are high, and after burning, environmental pollution is little, belong to renewable resources, be the recycling to waste, be extremely conducive to the strategy of China's sustainable development.Mainly contain at present following several about the prior art of biomass granule fuel:
Application number is 201210316538.4, the applying date is on August 31st, 2012, the application for a patent for invention that open day is on January 16th, 2013 discloses a kind of novel biomass granular fuel, belong to biomass granule fuel field, it comprises three kinds of raw materials of following mass percent: wood chip 20 ~ 60%, rice husk 20 ~ 45%, colliery powder: 10 ~ 40%, according to the above ratio wood chip and rice husk are ground into powder, add after colliery powder and evenly mix, drying, compression, screening, cooling and packaging process are made biomass granule fuel.By the way, the present invention can solve raw material that existing biomass granule fuel the exists unicity of drawing materials, the fuel combustion time is short, the problem such as insufficient of burning, and has advantages of that raw material sources are wide, reaches energy-conserving and environment-protective object, fuel combustion time lengthening, strengthened the calorific value of biomass granule fuel.But this patent of invention must be pulverized wood chip and rice husk, need to carry out repeated drying to raw material and cause production technique more complicated, the production time is long, yields poorly, the low and easy slagging scorification of ratio of briquetting.
Application number is 201010575582.8, and the applying date is on December 7th, 2010, within open day, is that the application for a patent for invention on April 13rd, 2011 discloses a kind of compound biomass granular fuel.Its object of this invention is to overcome the problems such as the ash fusion point that current cornstalk biological matter granular fuel exists is low, coking is serious, and a kind of novel compound biomass granular fuel is provided.This quality of fuel per-cent formula is: corn stalk powder 70-75%, powdered rice hulls 24-30%, calcium oxide powder 0.5-1%.Manufacture method is first maize straw and rice husk pulverizer to be processed into fine powder, and then adds calcium oxide powder, and mass percent in accordance with regulations mixes, and sends into the cylindrical particle fuel that is squeezed into diameter 6-10 millimeter in granule-forming machine.This biomass fuel is a kind of compound biomass granular fuel with good combustioncharacteristics, high grey fusibleness and low ash deposition propensity, can be widely used in various biomass combustion equipments.But the biological particles that this invention is produced equally also needs raw material pulverizing, repeated drying causes production technique more complicated, and the production time is long, yields poorly; When production, dust is large, poor working environment.
Application number is 201210289102.0, and the applying date is on August 15th, 2012, within open day, is that the application for a patent for invention on November 28th, 2012 discloses a kind of biomass granule fuel and preparation method thereof.Comprise that processing step is as follows: by broken after the clean removal of the agriculture and forestry organic waste material such as wood chip, stalk impurity, the starting material that acquisition particle size is 0.02 ~ 20mm; Starting material are dried, make its water ratio between 5 ~ 15%; Again be fixed to biomass granule fuel by extrusion formation equipment; Cooling; Screening, removes loose particle; Packaging storage after airflow machine is dry, water ratio is between 5 ~ 10%.Drying temperature is 200 ~ 300 DEG C, and extrusion molding pressure is 5 ~ 100MPa, and compression ratio is 1:4.5 ~ 1:9.The biomass granule fuel that this manufacture method is produced, utilize the natural consolidation composition that starting material itself contain that starting material are closely linked, do not add extra chemical additive as bonding medium, for environment-friendly biomass fuel, granular fuel diameter is 6 ~ 20mm, length is 3 ~ 5 times of diameter, and water ratio is 5 ~ 10%.This application for a patent for invention need to be pulverized raw material equally, raw material is carried out to repeated drying and cause complex process, production time long; With stalk, as raw material, its thermal value is relatively little, and it is large to take up room, and transportation cost is high.
Application number is 201310164261.2, the applying date is on May 7th, 2013, the application for a patent for invention that open day is on July 31st, 2013 discloses a kind of compound biomass granular fuel and complete processing thereof, and its formula is by weight percentage: Pericarppium arachidis hypogaeae 15-20%, wood chip 15-20%, rice husk 40-50%, grease 8-12%, colliery powder 6%-10% and calcium oxide 0.5%-1%.By described formula rate, Pericarppium arachidis hypogaeae, rice husk, wood dust are broken into powder, then add grease, colliery powder and calcium oxide, after mixing, compressed, screening, packaging process, make biomass granule fuel.The prepared compound biomass granular fuel of this invention has advantages of high combustion value and is difficult for slagging scorification, can be widely used in various biomass combustion equipments.This application for a patent for invention need to be pulverized raw material equally, raw material is carried out to repeated drying and cause complex process, production time long; Use material composition complexity, production cost is higher, and raw materials cost is higher.
Application number is 201110263329.3, the applying date is on September 7th, 2011, the application for a patent for invention that open day is on January 25th, 2012 discloses a kind of environment friendly biological matter granular fuel, it contains following weight part: 80 ~ 85 parts of wooden chaffs, 5 ~ 10 parts, mud, 0.1 ~ 1 part of sewer oil, its preparation method, comprises the steps:, by wooden chaff, drying sludge, to add sewer oil to stir, under high-temperature and high-pressure conditions, be processed into cylindrical particle.Biomass granule fuel of the present invention, production cost reduces, Energy Intensity Reduction; combustion heat value is high; combustion time is long, reduces wear and tear in machines, and effective protection of the environment also solves fuel problem; also protect the health simultaneously; environmental protection, reduces costs, and the waste residue after burning can go back to nature and make fertilizer; also the raw material of environmental protection brick be can do, mud and sewer oil the like waste recycling and harmless treatment realized.This patent of invention moulding process control is difficulty comparatively, under high-temperature and high-pressure conditions, carries out, and requires highly to establishing, and increased the production cost of enterprise, and ratio of briquetting is lower.
In central Sichuan area, because locality has particularly cypress resource of abundant forest, periphery has many wood working manufacturing enterprise, the a large amount of wood working waste of annual generation, mainly taking cypress sawdust, cypress wood shavings, cypress sanding powder as main, therefore domestic enterprise utilizes cypress sawdust or cypress wood shavings to produce biomass granule fuel, but because cypress sawdust has that raw materials cost is low, density is little, oiliness is low, toughness is low, water content high (40-60%), impurity be heavy, the feature such as easy-formation not; And the features such as cypress wood shavings have that raw materials cost is high, dry materials (water content is generally no more than 10%), volume is large, xylon is more complete, impurity ash content is low.According to biological particles traditional processing technology, cypress sawdust and wood shavings are after mechanical disintegration, material proportion is less, drying materials need repeat through 2-3 time, grain forming rate is low, dust pollution in production process increases the weight of, and production cost sharply strengthens, and is unfavorable for very much the theory of waste utilization and Renewable Energy Development.Meanwhile, carry out mechanical disintegration as cypress scrap feed material without conventional art, material quality is irregular, while using sizing production unit, cannot effectively form particle product by ring mould again because not controlling compression ratio, and key equipment serious wear.
In sum, there is following defect in the produced biomass fuel of prior art:
1, material composition complexity, mixing match requires accurately, to cause cost higher;
2, production craft step is many, technology controlling and process complexity, and processing requirement is high, and the production time is long, and ratio of briquetting is low, yields poorly;
Little, the easy slagging scorification of biomass granule fuel thermal value of 3, producing.
4, dust pollution is heavy, production cost is high, to production unit serious wear.
Summary of the invention
In order to overcome above-mentioned defect, the present invention aims to provide a kind of pure cypress biomass granule fuel production technique, the biomass granule fuel thermal value for preparing is large, be difficult for slagging scorification, raw material is wide and production cost is low, and this biomass granule fuel preparation technology dust simple, that produce is few simultaneously, ratio of briquetting is high and output is high.
In order to reach above-mentioned technical purpose, the technical solution used in the present invention is:
Pure cypress biomass granule fuel production technique, is characterized in that: comprise following processing step:
Step 1, by cypress sawdust through cylinder round sifter sieve removal oversize material obtain qualified cypress sawdust;
Step 2, by raw material lift, qualified cypress sawdust is sent into mix bucket, in cypress sawdust: the ratio of cypress wood shavings=2.5:1 is mixed;
Step 3, send the mixture that obtains after mixing to rotary drying machine disposable oven dry, after drying, material moisture is 10-15%;
Step 4, mixture after drying are sent into return fan through roto-sifter and are overturn aeration-coolingly, are cooled to 40~50 DEG C, simultaneously through the metal particle in pipe magnetic separator absorption mixture;
Step 5, the mixture after cooling is sent into central dust-collection batch hopper, according to mixture: the ratio of cypress wood shavings=4:1 is carried out dedusting mixing;
Step 6, dedusting are sent into nodulizer after mixing and are granulated, in pelletization, regulate through water spray oil spout ratio, making the total controlling temperature of material machine processed is 90~95 DEG C, high pressure temperature control regulates, make nodulizer forming ring mold internal pressure between 15~20Mpa, material compression is than regulating, and compression ratio is 1:4, then makes material forming granulation finished product through compression roller of granulator and extrusion ring mould;
Step 7, finished granule through hierarchical transmission band to imperfect particle and not moulding granulated slag carry out vibrosieve, imperfect particle and granulated slag are reclaimed with dust ventilating net, with cloth bag suction device, complete shaped granule is carried out to the bright and clean dust removal process of finished surface and obtain finished product, sieve finished product is carried out entering particulate material storehouse pack warehousing after quality separation with gradation.
In step 1, cypress water content is 40%~60%, the particle diameter≤3mm of described qualified cypress sawdust.
In step 2, cypress wood shavings water content is 6~12%, diameter≤15mm, thickness≤1.5mm.
In step 3, rotary drying machine roasting kiln wind pushing temperature is 110~130 DEG C.
The present invention has the following advantages:
1, biomass granule fuel provided by the invention is pure cypress biomass granule fuel, and its raw material is cypress sawdust and cypress wood shavings, does not contain other compositions, be easy to preparation, and cypress sawdust and cypress wood shavings source is wide, raw material is cheap, be specially adapted to central Sichuan area, production cost reduces greatly, and the biomass granule fuel impurity that adopts cypress sawdust and cypress wood shavings compound to make is few, and ash content is little, ratio of briquetting is high, clinkering rate is low, and thermal value is large, is easy to burning.
2, processing step of the present invention is: screening cypress sawdust, mixture material, oven dry, cooling down, by mixture mix with cypress wood shavings secondary, granulating obtains finished product.Processing step is simply easy to control, and no longer pulverizes raw material in production process, has reduced processing step, also do not need material to carry out repeated drying, first drying, has shortened technical process simultaneously, reduce the use of processing unit, thereby reduced production cost and the energy consumption of enterprise.Because technical process is shortened, also just shorten the production time, within the unit time, just can produce more biomass granule fuel, output is largely increased.
3,, when the present invention screens cypress sawdust and wood shavings, requiring the cypress sawdust water content after screening is 40%~60%, particle diameter≤3mm; Cypress wood shavings water content is 6~12%, diameter≤15mm, thickness≤1.5mm.Humidity is greater than 60% cypress sawdust to be taked shallow-layer to pave to reduce partially aqueous amount, with using after wet bulb thermometer test passes, and process time prolongation, production efficiency is lower.When raw material reaches These parameters, when drying, sawdust can within the optimal economic time, water content be down to 10~15%, again after mixing with qualified wood shavings, when particle extrusion molding, just can reach the bonding requirement of material at setting 15~20Mpa pressure, through many experiments, cypress finished granule density is at 1.1~1.3T/m 3time the best in quality, fuel value is maximum, coking rate is minimum, overdrying cross wet or particle diameter excessive too small all can not moulding.
4, when mixture material of the present invention in cypress sawdust: ratio mixture cypress sawdust and the cypress wood shavings of cypress wood shavings=2.5:1, such mixed ratio fully mixes material in the time that mixture turns round oven dry, water content and degree of adhesion are consistent, be difficult for conglomeration, extrusion molding is easy, and reach disposable and dry to the requirement of material moisture 10~15%, reduced oven dry number of times, shortened technical process.
5, the present invention adopts disposable oven dry mixture material, and making after mixture water content after drying materials is 10%~15%.10%~15% standard that material moisture after mixture is dried is in order to meet nodulizer moulding; under High Temperature High Pressure, it is long that material moisture can form L(by the ring nib footpath of 1:4 10%~15% time smoothly) 3~5cm, D(diameter) the qualified finished granule of 0.8cm.
6, cooling down; the temperature that makes material is 40~50 DEG C; the object that temperature limit is fixed on to this scope is in order to carry out second batch at material and during through parts equipment such as pipe magnetic separator, Belt Conveying equipment, central dust-collection systems; can not cause dry wood shavings to burn because of excess Temperature; and parts equipment is not damaged, simultaneously allow material fully mix before through secondary high-temperature high pressure entering nodulizer.
7, in mixture, mixture cypress wood shavings are prepared burden according to the ratio of 4:1; through many experiments; because wood shavings moisture is lower than 12%; particle diameter in the form of sheets; after oven dry, in mixture, add qualified wood shavings in this ratio; after sufficiently mixing, can ensure that the material moisture content and the degree of adhesion that enter nodulizer all reach moulding setting requirement, the finished granule of producing is density 1.1~1.3T/m 3salable product, qualification rate can reach 95%.
8, in pelletization, temperature is 90~95 DEG C, pressure 15~20Mpa, temperature and pressure are selected this scope, cypress sawdust after screening and the qualified mixture of wood shavings, adhesion-molded under the High Temperature High Pressure of this scope, just can produce quality and reach the biomass granule fuel of combustion requirements.
9, the present invention increases central dust-collection batching and reduces dust pollution, greatly reduces on the whole production cost, for enterprise has created good economic benefit.
10, in pelletization of the present invention, regulate through water spray oil spout ratio, making the total controlling temperature of material machine processed is 90~95 DEG C, high pressure temperature control regulates, make nodulizer forming ring mold internal pressure between 15~20Mpa, material compression is than regulating, compression ratio is 1:4, then makes material forming granulation finished product through compression roller of granulator and extrusion ring mould; Water spray object is to control when critical temperature through high temperature compressed exceeding when material, and suitably spray is cleaned tap water to material humidification, until temperature is down between 90~95 DEG C of normal ranges.Exceeding that 95 DEG C of materials are too dry can not moulding.Oil spout object is to carry out spray hydraulic efficiency oil lower than controlling when critical temperature to roller bearing through high temperature compressed when material, keeps bearing lubrication, reduces inlet amount simultaneously, reaches between 90~95 DEG C of normal ranges until control temperature.Can cause nodulizer materials inside to block lower than 90 DEG C, excessive can not the normal operation of roller bearing load, material can not extrusion molding; High pressure temperature control is by the demonstration of master control cabinet thermometer, and nodulizer forming ring mold internal pressure is between 15~20Mpa, and grain forming density is 1.1~1.3T/m 3.In the time that ring mould internal pressure is between 15~20Mpa, the total controlling temperature of material machine processed is 90~95 DEG C of normal ranges, and in the time encircling mould internal pressure lower than 15Mpa, the total controlling temperature of nodulizer can be lower than 90 DEG C, otherwise while exceeding 20Mpa, the total controlling temperature of nodulizer can be higher than 95 DEG C; Material compression is than customizing by ring mould component, through experiment repeatedly, use cypress sawdust and wood shavings to produce granular fuel, must use the customization ring mould that compression ratio is 1:4, use separately cypress sawdust to produce for raw material, ring mould compression ratio is 1:3.0~3.5, but ratio of briquetting only has 2/3 of mixture; Use separately cypress wood shavings can not carry out pelletizing forming for raw material.
11, finished granule of the present invention through hierarchical transmission band to imperfect particle and not moulding granulated slag carry out vibrosieve, imperfect particle and granulated slag are reclaimed with dust ventilating net, with cloth bag suction device, complete shaped granule is carried out to the bright and clean dust removal process of finished surface and obtain finished product, sieve finished product is carried out entering particulate material storehouse pack warehousing after quality separation with gradation.The good finished granule of the larger quality of proportion is vibrated and will preferentially be entered one-level feed bin by classification, and the inferior finished granule of the less quality of proportion enters secondary feed bin with travelling belt, and classification warehouse-in is convenient to transport, stores and is sold.
Brief description of the drawings
Fig. 1 is process flow sheet of the present invention.
Embodiment
Embodiment 1
The production technique of the present embodiment is as follows:
Step 1, the cypress sawdust of water content 40% sieve to removal oversize material and obtains the qualified cypress sawdust of particle diameter≤3mm through cylinder round sifter;
Step 2, by raw material lift, qualified cypress sawdust is sent into mix bucket, in cypress sawdust: the ratio of cypress wood shavings=2.5:1 is mixed, and cypress wood shavings water content is 10%, and diameter is 15mm, and thickness is 1.5mm;
Step 3, send the mixture that obtains after mixing to rotary drying machine disposable oven dry, described rotary drying machine roasting kiln wind pushing temperature is 130 DEG C, and after drying, material moisture is 12%;
Step 4, mixture after drying are sent into return fan through roto-sifter and are overturn aeration-coolingly, are cooled to 40 DEG C, simultaneously through the metal particle in pipe magnetic separator absorption mixture;
Step 5, the mixture after cooling is sent into central dust-collection batch hopper, according to mixture: the ratio of cypress wood shavings=4:1 is carried out dedusting mixing;
Step 6, dedusting are sent into nodulizer after mixing and are granulated, in pelletization, regulate through water spray oil spout ratio, making the total controlling temperature of material machine processed is 90 DEG C, high pressure temperature control regulates, make nodulizer forming ring mold internal pressure at 15Mpa, material compression is than regulating, and compression ratio is 1:4, then makes material forming granulation finished product through compression roller of granulator and extrusion ring mould;
Step 7, finished granule through hierarchical transmission band to imperfect particle and not moulding granulated slag carry out vibrosieve, imperfect particle and granulated slag are reclaimed with dust ventilating net, with cloth bag suction device, complete shaped granule is carried out to the bright and clean dust removal process of finished surface and obtain finished product, sieve finished product is carried out entering particulate material storehouse pack warehousing after quality separation with gradation.
The biomass granule fuel grain forming density of producing is 1.1T/m 3, particle is long is 3.5cm, and diameter is 0.8cm, and water ratio is 11%, and qualification rate is 95%.
Embodiment 2
Step 1, the cypress sawdust of water content 45% sieve to removal oversize material and obtains the qualified cypress sawdust of particle diameter≤3mm through cylinder round sifter;
Step 2, by raw material lift, qualified cypress sawdust is sent into mix bucket, in cypress sawdust: the ratio of cypress wood shavings=2.5:1 is mixed, and cypress wood shavings water content is 12%, and diameter is 14mm, and thickness is 1.5mm.;
Step 3, send the mixture that obtains after mixing to rotary drying machine disposable oven dry, described rotary drying machine roasting kiln wind pushing temperature is 125 DEG C, and after drying, material moisture is 10%;
Step 4, mixture after drying are sent into return fan through roto-sifter and are overturn aeration-coolingly, are cooled to 40 DEG C, simultaneously through the metal particle in pipe magnetic separator absorption mixture;
Step 5, the mixture after cooling is sent into central dust-collection batch hopper, according to mixture: the ratio of cypress wood shavings=4:1 is carried out dedusting mixing;
Step 6, dedusting are sent into nodulizer after mixing and are granulated, in pelletization, regulate through water spray oil spout ratio, making the total controlling temperature of material machine processed is 92 DEG C, high pressure temperature control regulates, make nodulizer forming ring mold internal pressure at 17Mpa, material compression is than regulating, and compression ratio is 1:4, then makes material forming granulation finished product through compression roller of granulator and extrusion ring mould;
Step 7, finished granule through hierarchical transmission band to imperfect particle and not moulding granulated slag carry out vibrosieve, imperfect particle and granulated slag are reclaimed with dust ventilating net, with cloth bag suction device, complete shaped granule is carried out to the bright and clean dust removal process of finished surface and obtain finished product, sieve finished product is carried out entering particulate material storehouse pack warehousing after quality separation with gradation.
The biomass granule fuel grain forming density of producing is 1.2T/m 3, particle is long is 3cm, and diameter is 0.8cm, and water ratio is 10%, and qualification rate is 94%.
Step 3
Step 1, the cypress sawdust of water content 50% sieve to removal oversize material and obtains the qualified cypress sawdust of particle diameter≤3mm through cylinder round sifter;
Step 2, by raw material lift, qualified cypress sawdust is sent into mix bucket, in cypress sawdust: the ratio of cypress wood shavings=2.5:1 is mixed, and cypress wood shavings water content is 6%, and diameter is 13mm, and thickness is 1.2mm;
Step 3, send the mixture that obtains after mixing to rotary drying machine disposable oven dry, described rotary drying machine roasting kiln wind pushing temperature is 125 DEG C, and after drying, material moisture is 14%;
Step 4, mixture after drying are sent into return fan through roto-sifter and are overturn aeration-coolingly, are cooled to 40 DEG C, simultaneously through the metal particle in pipe magnetic separator absorption mixture;
Step 5, the mixture after cooling is sent into central dust-collection batch hopper, according to mixture: the ratio of cypress wood shavings=4:1 is carried out dedusting mixing;
Step 6, dedusting are sent into nodulizer after mixing and are granulated, in pelletization, regulate through water spray oil spout ratio, making the total controlling temperature of material machine processed is 94 DEG C, high pressure temperature control regulates, make nodulizer forming ring mold internal pressure at 18Mpa, material compression is than regulating, and compression ratio is 1:4, then makes material forming granulation finished product through compression roller of granulator and extrusion ring mould;
Step 7, finished granule through hierarchical transmission band to imperfect particle and not moulding granulated slag carry out vibrosieve, imperfect particle and granulated slag are reclaimed with dust ventilating net, with cloth bag suction device, complete shaped granule is carried out to the bright and clean dust removal process of finished surface and obtain finished product, sieve finished product is carried out entering particulate material storehouse pack warehousing after quality separation with gradation.
The biomass granule fuel grain forming density of producing is 1.3T/m 3, particle is long is 5cm, and diameter is 0.8cm, and water ratio is 12%, and qualification rate is 95%.
Step 4
Step 1, the cypress sawdust of water content 55% sieve to removal oversize material and obtains the qualified cypress sawdust of particle diameter≤3mm through cylinder round sifter;
Step 2, by raw material lift, qualified cypress sawdust is sent into mix bucket, in cypress sawdust: the ratio of cypress wood shavings=2.5:1 is mixed, and cypress wood shavings water content is 12%, and diameter is 15mm, and thickness is 1.1mm;
Step 3, send the mixture that obtains after mixing to rotary drying machine disposable oven dry, described rotary drying machine roasting kiln wind pushing temperature is 110 DEG C, and after drying, material moisture is 15%;
Step 4, mixture after drying are sent into return fan through roto-sifter and are overturn aeration-coolingly, are cooled to 40 DEG C, simultaneously through the metal particle in pipe magnetic separator absorption mixture;
Step 5, the mixture after cooling is sent into central dust-collection batch hopper, according to mixture: the ratio of cypress wood shavings=4:1 is carried out dedusting mixing;
Step 6, dedusting are sent into nodulizer after mixing and are granulated, in pelletization, regulate through water spray oil spout ratio, making the total controlling temperature of material machine processed is 95 DEG C, high pressure temperature control regulates, make nodulizer forming ring mold internal pressure at 20Mpa, material compression is than regulating, and compression ratio is 1:4, make material forming, granulation finished product through compression roller of granulator and extrusion ring mould again;
Step 7, finished granule through hierarchical transmission band to imperfect particle and not moulding granulated slag carry out vibrosieve, imperfect particle and granulated slag are reclaimed with dust ventilating net, with cloth bag suction device, complete shaped granule is carried out to the bright and clean dust removal process of finished surface and obtain finished product, sieve finished product is carried out entering particulate material storehouse pack warehousing after quality separation with gradation.
The biomass granule fuel grain forming density of producing is 1.25T/m 3, particle is long is 4cm, and diameter is 0.8cm, and water ratio is 12%, and qualification rate is 93.5%.
Step 5
Step 1, the cypress sawdust of water content 60% sieve to removal oversize material and obtains the qualified cypress sawdust of particle diameter≤3mm through cylinder round sifter;
Step 2, by raw material lift, qualified cypress sawdust is sent into mix bucket, in cypress sawdust: the ratio of cypress wood shavings=2.5:1 is mixed, and cypress wood shavings water content is 11%, and diameter is 12mm, and thickness is 0.8mm;
Step 3, send the mixture that obtains after mixing to rotary drying machine disposable oven dry, described rotary drying machine roasting kiln wind pushing temperature is 130 DEG C, and after drying, material moisture is 13.5%;
Step 4, mixture after drying are sent into return fan through roto-sifter and are overturn aeration-coolingly, are cooled to 40 DEG C, simultaneously through the metal particle in pipe magnetic separator absorption mixture;
Step 5, the mixture after cooling is sent into central dust-collection batch hopper, according to mixture: the ratio of cypress wood shavings=4:1 is carried out dedusting mixing;
Step 6, dedusting are sent into nodulizer after mixing and are granulated, in pelletization, regulate through water spray oil spout ratio, making the total controlling temperature of material machine processed is 95 DEG C, high pressure temperature control regulates, make nodulizer forming ring mold internal pressure at 16Mpa, material compression is than regulating, and compression ratio is 1:4, make material forming, granulation finished product through compression roller of granulator and extrusion ring mould again;
Step 7, finished granule through hierarchical transmission band to imperfect particle and not moulding granulated slag carry out vibrosieve, imperfect particle and granulated slag are reclaimed with dust ventilating net, with cloth bag suction device, complete shaped granule is carried out to the bright and clean dust removal process of finished surface and obtain finished product, sieve finished product is carried out entering particulate material storehouse pack warehousing after quality separation with gradation.
The biomass granule fuel grain forming density of producing is 1.15T/m 3, particle is long is 3.5cm, and diameter is 0.8cm, and water ratio is 11.8%, and qualification rate is 93.5%.

Claims (2)

1. pure cypress biomass granule fuel production technique, is characterized in that: comprise following processing step:
Step 1, by cypress sawdust through cylinder round sifter sieve removal oversize material obtain qualified cypress sawdust;
Step 2, by raw material lift, qualified cypress sawdust is sent into mix bucket, in cypress sawdust: the ratio of cypress wood shavings=2.5:1 is mixed;
Step 3, send the mixture that obtains after mixing to rotary drying machine disposable oven dry, after drying, material moisture is 10-15%;
Step 4, mixture after drying are sent into return fan through roto-sifter and are overturn aeration-coolingly, are cooled to 40~50 DEG C, simultaneously through the metal particle in pipe magnetic separator absorption mixture;
Step 5, the mixture after cooling is sent into central dust-collection batch hopper, according to mixture: the ratio of cypress wood shavings=4:1 is carried out dedusting mixing;
Step 6, dedusting are sent into nodulizer after mixing and are granulated, in pelletization, regulate through water spray oil spout ratio, making the total controlling temperature of material machine processed is 90~95 DEG C, high pressure temperature control regulates, make nodulizer forming ring mold internal pressure between 15~20Mpa, material compression is than regulating, and compression ratio is 1:4, then makes material forming granulation finished product through compression roller of granulator and extrusion ring mould;
Step 7, finished granule through hierarchical transmission band to imperfect particle and not moulding granulated slag carry out vibrosieve, imperfect particle and granulated slag are reclaimed with dust ventilating net, with cloth bag suction device, complete shaped granule is carried out to the bright and clean dust removal process of finished surface and obtain finished product, sieve finished product is carried out entering particulate material storehouse pack warehousing after quality separation with gradation;
The qualified cypress sawdust water content obtaining after screening in step 1 is 40%~60%, the particle diameter≤3mm of described qualified cypress sawdust;
In step 2, cypress wood shavings water content is 6~12%, diameter≤15mm, thickness≤1.5mm.
2. pure cypress biomass granule fuel production technique according to claim 1, is characterized in that: in step 3, rotary drying machine roasting kiln wind pushing temperature is 110~130 DEG C.
CN201310415532.7A 2013-09-13 2013-09-13 Production technique of pure cedar biomass granular fuel CN103450962B (en)

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CN104197354B (en) * 2014-07-24 2017-03-15 广州迪森热能技术股份有限公司 Dust recycling system before biomass stove
CN104774668A (en) * 2015-04-17 2015-07-15 六安市恒能生物质能源有限公司 Preparation technique of biomass granular fuel
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