CN103450962A - Production technique of pure cedar biomass granular fuel - Google Patents
Production technique of pure cedar biomass granular fuel Download PDFInfo
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- CN103450962A CN103450962A CN2013104155327A CN201310415532A CN103450962A CN 103450962 A CN103450962 A CN 103450962A CN 2013104155327 A CN2013104155327 A CN 2013104155327A CN 201310415532 A CN201310415532 A CN 201310415532A CN 103450962 A CN103450962 A CN 103450962A
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- 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
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- 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
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
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
Fuel commonly used is mostly that coal, oil, coal gas are main, and these resources are all Nonrenewable resources, are unfavorable for environmental protection, also are 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, extremely be conducive to the strategy of China's sustainable development.Prior art about biomass granule fuel mainly contains following several at present:
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 the 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 to 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 purpose, 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, and the application for a patent for invention that open day is on April 13rd, 2011 discloses a kind of compound biomass granular fuel.This is invented its purpose and 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 to be processed into to fine powder with pulverizer, and then adds calcium oxide powder, and mass percent in accordance with regulations mixes, and sends in granule-forming machine the cylindrical particle fuel that is squeezed into diameter 6-10 millimeter.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; During production, dust is large, poor working environment.
Application number is 201210289102.0, and the applying date is on August 15th, 2012, and the application for a patent for invention that open day is 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 materials such as wood chip, stalk impurity, the starting material that the acquisition particle size is 0.02 ~ 20mm; Starting material are carried out to drying, make its water ratio between 5 ~ 15%; Again be fixed to biomass granule fuel by extrusion formation equipment; Cooling; Screening, remove loose particle; Packing storage after the airflow machine drying, water ratio is between 5 ~ 10%.Drying temperature is 200 ~ 300 ℃, 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, the 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 less, and it is large to take up room, 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 to powder, then add grease, colliery powder and calcium oxide, after mixing, compressed, screening, packaging process, make biomass granule fuel.This is invented prepared compound biomass granular fuel and has advantages of the high combustion value and be 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, comprise the steps: to add sewer oil to stir wooden chaff, drying sludge, 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, reduce 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 is controlled comparatively difficulty, under high-temperature and high-pressure conditions, carries out, and to establishing, requires highly, increased the production cost of enterprise, and ratio of briquetting is lower.
In the 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 take cypress sawdust, cypress wood shavings, cypress sanding powder as main, therefore domestic enterprise utilizes cypress sawdust or cypress wood shavings to produce material grains fuel next life, but because the 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, characteristics such as easy-formation not; And the characteristics such as the cypress wood shavings have that raw materials cost is high, dry materials (water content generally is no more than 10%), volume is large, xylon is more complete, the impurity ash content is low.According to the 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, the 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.Simultaneously, as the cypress scrap feed material, without conventional art, carry out mechanical disintegration, the material quality is irregular, while using the typing production unit, because not controlling compression ratio, can't effectively by the ring mould, form particle product again, and the 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, the technology controlling and process complexity, and processing requirement is high, and the production time is long, and ratio of briquetting is low, yields poorly;
3, the biomass granule fuel thermal value of producing is little, easily slagging scorification.
4, dust pollution is heavy, production cost is high, to the 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 prepared 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 the cypress sawdust through cylinder round sifter sieve the removal oversize material obtain qualified cypress sawdust;
Step 2, by the raw material lift, qualified cypress sawdust is sent into to the mix bucket, in the cypress sawdust: the ratio of cypress wood shavings=2.5:1 is mixed;
Step 3, send the mixture obtained after mixing to rotary drying machine disposable oven dry, after drying, material moisture is 10-15%;
Step 4, the mixture after drying are sent into return fan through roto-sifter and are overturn aeration-coolingly, are cooled to 40～50 ℃, simultaneously through the metal particle in pipe magnetic separator absorption mixture;
Step 5, the mixture after cooling is sent into to the central dust-collection batch hopper, according to mixture: the ratio of cypress wood shavings=4:1 is carried out the dedusting mixing;
Step 6, dedusting are sent into nodulizer after mixing and are granulated, in pelletization, through water spray oil spout ratio, regulate, making the total controlling temperature of material machine processed is 90～95 ℃, the high pressure temperature control is regulated, 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 reach not moulding granulated slag through the hierarchical transmission band to imperfect particle and carry out vibrosieve, with dust ventilating net, imperfect particle and granulated slag are reclaimed, with the 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, with the gradation sieve, finished product is carried out entering particulate material storehouse pack warehousing after the quality separation.
In step 1, the 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 ℃.
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 the 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, the material that is mixed, oven dry, cooling down, by mixture with cypress wood shavings secondary, mix, granulating obtains finished product.Processing step simply is easy to control, and no longer pulverizes raw material in production process, has reduced processing step, also do not need material is carried out to repeated drying, first drying gets final product, and 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 shortened the production time, just can produce more biomass granule fuel within the unit time, output is largely increased.
When 3, the present invention screens cypress sawdust and wood shavings, the cypress sawdust water content after requiring to screen 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 and takes shallow-layer to pave to reduce the partially aqueous amount, with using after the wet bulb thermometer test passes, and the process time prolongation, production efficiency is lower.When raw material reaches These parameters, when being dried, sawdust can in the time, water content be down to 10～15% in optimal economic, again through with after qualified wood shavings mix, just can reach the bonding requirement of material at setting 15～20Mpa pressure during the particle extrusion molding, through many experiments, cypress finished granule density is at 1.1～1.3T/m
3the time 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.
When 4, the present invention is mixed material in the cypress sawdust: the ratio of cypress wood shavings=2.5:1 be mixed cypress sawdust and cypress wood shavings, such mixed ratio fully mixes material when 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 the oven dry number of times, shortened technical process.
5, the present invention adopts the disposable oven dry material that is mixed, and making water content after the rear drying materials that is mixed is 10%～15%.10%～15% standard that the rear material moisture that is mixed is dried is in order to meet the nodulizer moulding; under High Temperature High Pressure, material moisture can be smoothly 10%～15% the time to form L(long ring nib footpath by 1:4) 3～5cm, D(diameter) the qualified finished granule of 0.8cm.
6, cooling down; the temperature that makes material is 40～50 ℃; the purpose 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, before entering nodulizer process secondary high-temperature high pressure, allow material fully mix simultaneously.
7, the cypress wood shavings that are mixed in mixture are prepared burden according to the ratio of 4:1; through many experiments; because of wood shavings moisture lower than 12%; particle diameter in the form of sheets; add qualified wood shavings in this ratio in mixture after oven dry; after sufficiently mixing, can guarantee 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 ℃, 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 the biomass granule fuel that quality reaches combustion requirements.
9, the present invention increases the 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, through water spray oil spout ratio, regulate, making the total controlling temperature of material machine processed is 90～95 ℃, the high pressure temperature control is regulated, 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; The water spray purpose be when material through high temperature compressed while surpass controlling critical temperature, suitably spray is cleaned tap water to the material humidification, until temperature is down between 90～95 ℃ of normal ranges.Too drying can not moulding to surpass 95 ℃ of materials.The oil spout purpose be when material through high temperature compressed when controlling critical temperature, carry out spray hydraulic efficiency oil to roller bearing, keep bearing lubrication, reduce inlet amount simultaneously, until control temperature, reach between 90～95 ℃ of normal ranges.Can cause the nodulizer materials inside to block lower than 90 ℃, excessive can not the normal operation of roller bearing load, material can not extrusion molding; The 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.When ring mould internal pressure is between 15～20Mpa, the total controlling temperature of material machine processed is 90～95 ℃ of normal ranges, and when ring mould internal pressure during lower than 15Mpa, the total controlling temperature of nodulizer can be lower than 90 ℃, otherwise, during over 20Mpa, the total controlling temperature of nodulizer can be higher than 95 ℃; 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 the cypress sawdust to be produced 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 the cypress wood shavings can not carry out pelletizing forming for raw material.
11, finished granule of the present invention through the hierarchical transmission band to imperfect particle and not the moulding granulated slag carry out vibrosieve, with dust ventilating net, imperfect particle and granulated slag are reclaimed, with the 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, with the gradation sieve, finished product is carried out entering particulate material storehouse pack warehousing after the quality separation.The larger quality of proportion finished granule is preferably vibrated and will preferentially be entered the one-level feed bin by classification, and the inferior finished granule of the less quality of proportion enters the secondary feed bin with travelling belt, and the classification warehouse-in is convenient to transportation, stores and is sold.
The accompanying drawing explanation
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 the removal oversize material through cylinder round sifter obtain the qualified cypress sawdust of particle diameter≤3mm;
Step 2, by the raw material lift, qualified cypress sawdust is sent into to the mix bucket, in the 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 obtained after mixing to rotary drying machine disposable oven dry, described rotary drying machine roasting kiln wind pushing temperature is 130 ℃, and after drying, material moisture is 12%;
Step 4, the mixture after drying are sent into return fan through roto-sifter and are overturn aeration-coolingly, are cooled to 40 ℃, simultaneously through the metal particle in pipe magnetic separator absorption mixture;
Step 5, the mixture after cooling is sent into to the central dust-collection batch hopper, according to mixture: the ratio of cypress wood shavings=4:1 is carried out the dedusting mixing;
Step 6, dedusting are sent into nodulizer after mixing and are granulated, in pelletization, through water spray oil spout ratio, regulate, making the total controlling temperature of material machine processed is 90 ℃, the high pressure temperature control is regulated, 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 reach not moulding granulated slag through the hierarchical transmission band to imperfect particle and carry out vibrosieve, with dust ventilating net, imperfect particle and granulated slag are reclaimed, with the 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, with the gradation sieve, finished product is carried out entering particulate material storehouse pack warehousing after the quality separation.
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 the removal oversize material through cylinder round sifter obtain the qualified cypress sawdust of particle diameter≤3mm;
Step 2, by the raw material lift, qualified cypress sawdust is sent into to the mix bucket, in the 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 obtained after mixing to rotary drying machine disposable oven dry, described rotary drying machine roasting kiln wind pushing temperature is 125 ℃, and after drying, material moisture is 10%;
Step 4, the mixture after drying are sent into return fan through roto-sifter and are overturn aeration-coolingly, are cooled to 40 ℃, simultaneously through the metal particle in pipe magnetic separator absorption mixture;
Step 5, the mixture after cooling is sent into to the central dust-collection batch hopper, according to mixture: the ratio of cypress wood shavings=4:1 is carried out the dedusting mixing;
Step 6, dedusting are sent into nodulizer after mixing and are granulated, in pelletization, through water spray oil spout ratio, regulate, making the total controlling temperature of material machine processed is 92 ℃, the high pressure temperature control is regulated, 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 reach not moulding granulated slag through the hierarchical transmission band to imperfect particle and carry out vibrosieve, with dust ventilating net, imperfect particle and granulated slag are reclaimed, with the 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, with the gradation sieve, finished product is carried out entering particulate material storehouse pack warehousing after the quality separation.
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 the removal oversize material through cylinder round sifter obtain the qualified cypress sawdust of particle diameter≤3mm;
Step 2, by the raw material lift, qualified cypress sawdust is sent into to the mix bucket, in the 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 obtained after mixing to rotary drying machine disposable oven dry, described rotary drying machine roasting kiln wind pushing temperature is 125 ℃, and after drying, material moisture is 14%;
Step 4, the mixture after drying are sent into return fan through roto-sifter and are overturn aeration-coolingly, are cooled to 40 ℃, simultaneously through the metal particle in pipe magnetic separator absorption mixture;
Step 5, the mixture after cooling is sent into to the central dust-collection batch hopper, according to mixture: the ratio of cypress wood shavings=4:1 is carried out the dedusting mixing;
Step 6, dedusting are sent into nodulizer after mixing and are granulated, in pelletization, through water spray oil spout ratio, regulate, making the total controlling temperature of material machine processed is 94 ℃, the high pressure temperature control is regulated, 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 reach not moulding granulated slag through the hierarchical transmission band to imperfect particle and carry out vibrosieve, with dust ventilating net, imperfect particle and granulated slag are reclaimed, with the 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, with the gradation sieve, finished product is carried out entering particulate material storehouse pack warehousing after the quality separation.
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 the removal oversize material through cylinder round sifter obtain the qualified cypress sawdust of particle diameter≤3mm;
Step 2, by the raw material lift, qualified cypress sawdust is sent into to the mix bucket, in the 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 obtained after mixing to rotary drying machine disposable oven dry, described rotary drying machine roasting kiln wind pushing temperature is 110 ℃, and after drying, material moisture is 15%;
Step 4, the mixture after drying are sent into return fan through roto-sifter and are overturn aeration-coolingly, are cooled to 40 ℃, simultaneously through the metal particle in pipe magnetic separator absorption mixture;
Step 5, the mixture after cooling is sent into to the central dust-collection batch hopper, according to mixture: the ratio of cypress wood shavings=4:1 is carried out the dedusting mixing;
Step 6, dedusting are sent into nodulizer after mixing and are granulated, in pelletization, through water spray oil spout ratio, regulate, making the total controlling temperature of material machine processed is 95 ℃, the high pressure temperature control is regulated, make nodulizer forming ring mold internal pressure at 20Mpa, material compression is than regulating, and compression ratio is 1:4, make material forming, the granulation finished product through compression roller of granulator and extrusion ring mould again;
Step 7, finished granule reach not moulding granulated slag through the hierarchical transmission band to imperfect particle and carry out vibrosieve, with dust ventilating net, imperfect particle and granulated slag are reclaimed, with the 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, with the gradation sieve, finished product is carried out entering particulate material storehouse pack warehousing after the quality separation.
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 the removal oversize material through cylinder round sifter obtain the qualified cypress sawdust of particle diameter≤3mm;
Step 2, by the raw material lift, qualified cypress sawdust is sent into to the mix bucket, in the 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 obtained after mixing to rotary drying machine disposable oven dry, described rotary drying machine roasting kiln wind pushing temperature is 130 ℃, and after drying, material moisture is 13.5%;
Step 4, the mixture after drying are sent into return fan through roto-sifter and are overturn aeration-coolingly, are cooled to 40 ℃, simultaneously through the metal particle in pipe magnetic separator absorption mixture;
Step 5, the mixture after cooling is sent into to the central dust-collection batch hopper, according to mixture: the ratio of cypress wood shavings=4:1 is carried out the dedusting mixing;
Step 6, dedusting are sent into nodulizer after mixing and are granulated, in pelletization, through water spray oil spout ratio, regulate, making the total controlling temperature of material machine processed is 95 ℃, the high pressure temperature control is regulated, make nodulizer forming ring mold internal pressure at 16Mpa, material compression is than regulating, and compression ratio is 1:4, make material forming, the granulation finished product through compression roller of granulator and extrusion ring mould again;
Step 7, finished granule reach not moulding granulated slag through the hierarchical transmission band to imperfect particle and carry out vibrosieve, with dust ventilating net, imperfect particle and granulated slag are reclaimed, with the 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, with the gradation sieve, finished product is carried out entering particulate material storehouse pack warehousing after the quality separation.
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 (4)
1. pure cypress biomass granule fuel production technique is characterized in that: comprise following processing step:
Step 1, by the cypress sawdust through cylinder round sifter sieve the removal oversize material obtain qualified cypress sawdust;
Step 2, by the raw material lift, qualified cypress sawdust is sent into to the mix bucket, in the cypress sawdust: the ratio of cypress wood shavings=2.5:1 is mixed;
Step 3, send the mixture obtained after mixing to rotary drying machine disposable oven dry, after drying, material moisture is 10-15%;
Step 4, the mixture after drying are sent into return fan through roto-sifter and are overturn aeration-coolingly, are cooled to 40～50 ℃, simultaneously through the metal particle in pipe magnetic separator absorption mixture;
Step 5, the mixture after cooling is sent into to the central dust-collection batch hopper, according to mixture: the ratio of cypress wood shavings=4:1 is carried out the dedusting mixing;
Step 6, dedusting are sent into nodulizer after mixing and are granulated, in pelletization, through water spray oil spout ratio, regulate, making the total controlling temperature of material machine processed is 90～95 ℃, the high pressure temperature control is regulated, 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 reach not moulding granulated slag through the hierarchical transmission band to imperfect particle and carry out vibrosieve, with dust ventilating net, imperfect particle and granulated slag are reclaimed, with the 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, with the gradation sieve, finished product is carried out entering particulate material storehouse pack warehousing after the quality separation.
2. pure cypress biomass granule fuel production technique according to claim 1, it is characterized in that: in step 1, the cypress water content is 40%～60%, the particle diameter≤3mm of described qualified cypress sawdust.
3. pure cypress biomass granule fuel production technique according to claim 1 and 2, it is characterized in that: in step 2, cypress wood shavings water content is 6～12%, diameter≤15mm, thickness≤1.5mm.
4. pure cypress biomass granule fuel production technique according to claim 3, it is characterized in that: in step 3, rotary drying machine roasting kiln wind pushing temperature is 110～130 ℃.
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