CN106190202B - A kind of preparation method and biomass charcoal powder of the boiler biomass charcoal powder that dusts - Google Patents
A kind of preparation method and biomass charcoal powder of the boiler biomass charcoal powder that dusts Download PDFInfo
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- CN106190202B CN106190202B CN201610849342.XA CN201610849342A CN106190202B CN 106190202 B CN106190202 B CN 106190202B CN 201610849342 A CN201610849342 A CN 201610849342A CN 106190202 B CN106190202 B CN 106190202B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/02—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B49/00—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated
- C10B49/02—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated with hot gases or vapours, e.g. hot gases obtained by partial combustion of the charge
- C10B49/04—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated with hot gases or vapours, e.g. hot gases obtained by partial combustion of the charge while moving the solid material to be treated
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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
Abstract
The present invention relates to the preparation methods and biomass charcoal powder of a kind of boiler biomass charcoal powder that dusts, belong to biomass fuel technical field.The preparation method includes: 1) to be passed through nitrogen into retort to make in furnace for after anaerobic or low-oxygen environment, by biomass raw material particle from retort top feed, thermal current enters from charing furnace bottom；The reaction temperature of control charing furnace bottom is 200~280 DEG C, and furnace pressure is 1010~1200mbar, and charing furnace bottom reaction generates biomass carbon fuel；2) by biomass carbon fuel be ground to 100~200 mesh to get.Biomass carbon fuel is first made using low-temperature carbonization technique, then grinds biomass charcoal powder obtained, has the advantages that ignition temperature is low, integrated combustion property index is high, with excellent combustibility, the fuel for the boiler that is suitable as dusting.
Description
Technical field
The invention belongs to biomass fuel technical fields, and in particular to a kind of preparation side for the boiler biomass charcoal powder that dusts
Method also relates to a kind of resulting boiler biomass charcoal powder that dusts of above-mentioned preparation method.
Background technique
China is stalk output big country, and the pollution problem of agricultural crop straw is always the bottleneck for perplexing agricultural development.According to
Biomass path for transformation, biomass energy includes physical transformations, bioconversion and chemical conversion using technology at present.Physics turns
Changing is mainly physical compression, briquetting processing, prepares biomass solid formed fuel；Bioconversion is mainly anaerobic digestion producing methane
And fermentative production of ethanol；Chemical conversion includes liquefaction, gasification, charing etc., is emphasis studied both at home and abroad at present, is concentrated mainly on
The research of biomass liquefying and gasification aspect, less for the biomass carbonated research for preparing biomass carbon fuel and current
Biomass pyrolytic charing technology generally uses batch technology to carry out under medium temperature (400 DEG C~700 DEG C) or high temperature (>=700 DEG C),
It is at high cost, most to rest on the laboratory research stage.
Biomass pyrolytic refers to biomass under conditions of anaerobic or hypoxemia, by thermal chemical reaction by biomass macromolecular
Substance (lignin, cellulose and hemicellulose) resolves into the fuel material (solid-state charcoal, combustible gas, bio oil) compared with small molecule
Thermochemical study technical method.
In the prior art, CN102703099A discloses one kind and vertically moves bed rice husk carbonization furnace and its a carbonization rice husk side
Method, carbide furnace include particle system, gas burning system, operation gas system and control system, and particle system forms hanging down for rice husk whereabouts
Straight moving bed, operation gas system be generate operation gas work department, rice husk vertically move in bed with operation gas generation refluent heat
Exchange.The method of its carbonization rice husk includes: that S1. is fed into upper feed bin and buys securities with all one's capital；S2. start combustion gas blower and recirculated cooling water
Pump；S3. the start-up burner igniting of combustion chamber, while opening control system；S4. it adjusts: the target ginseng of residual oxygen concentration sensor
Number cannot be less than 1%, and the target component of operation gas temperature sensor is 675~685 DEG C, the target of furnace exit temperature sensor
Parameter is 96~100 DEG C, and the target component of furnace outlet pressure sensor is -50~-30Pa, the target of dump temperature sensor
Parameter is less than 400 DEG C；S5. when the target component of furnace exit temperature sensor reaches 96~100 DEG C, step by step input pair combustion gas
Blower, pressure fan, and start-up burner load is gradually reduced to zero, using rice husk level sensor, gradually increases load and arrive
Rated load；S6. normal production；S7. it shuts down: being fed deactivated rice husk and use other little particle inert materials instead, lower flapper is adjusted
To peak load；Successively close secondary combustion gas blower, pressure fan, deactivation control system；Combustion gas blower is preferably minimized load；Until rice
Shell goes out net rear blowing out.The method of above-mentioned carbonization rice husk realizes the temperature control continuous carbonization of rice husk on a manufacturing scale, and product is to live
Property carbonization rice husk, lightweight wood tar and fuel gas.But carburizing temperature is excessively high, products obtained therefrom is active carbon material, energy
Density is low, cannot function as fuel use, and energy yield is low.
The biomass moulding carbon of biomass carbonization technique production is using timber or lignifying raw material by not exclusively combustion
It burns, or is pyrolyzed in the absence of air conditions, the remaining dark brown of institute or black porosu solid fuel.According to the spy of raw material
Property, carbonization temperature is up to 600~900 DEG C in production process, therefore forms that carbon production technology is complicated, and efficient energy conversion only has
60% or so, at high cost, the unfavorable popularization energy for being widely used as big industry.
In the prior art, CN105733730A discloses a kind of biomass micron carbonized powder method for high temperature combustion, including
Following steps: 1) it is carbonized: being carried out biomass using the lightly-carbonized technique of external-heat lightly-carbonized, carburizing temperature is 350~390
DEG C, distillate the wood vinegar and tar ingredients in biomass；2) biomass after carbonization micronized processing: is subjected to micronized add
Work generates biomass micron carbon dust fuel；3) it mixes: the biomass micron carbon dust fuel and sky that micronized processing is generated
Gas is mixed to form carbon dust cloud；4) it sprays cloud: the carbon dust cloud being mixed to form is sprayed onto combustion chamber, burner hearth or combustor or burner.
In the above method, lightly-carbonized technique will clean lightly-carbonized product and be carried out being crushed into micron with Highefficientpulverizer
Carbon powder fuel obtains biomass micron carbon dust that is a kind of inexpensive and can forming high-temp combustion；It is quantitatively provided from hopper, and
Carbon dust cloud is formed with air, and liquid flash calciner to combustion chamber or burner hearth, become a kind of can accurately determine close to fuel oil and combustion gas
The high-grade fluid fuel of amount and controlled temperature combustion, automatic control charging easy to accomplish and ignition temperature.But lightly-carbonized work
The temperature of skill is 350-390 DEG C, distillates the wood vinegar and tar ingredients in biomass, and 1.5 tons of stalks produce 1 ton of biological carbon, matter
Rate is measured less than 67%, quality yield or relatively low likewise, energy conversion rate is relatively low, leads to high production cost (combustion
Expect more at high cost than coal).
Summary of the invention
The object of the present invention is to provide a kind of preparation method of boiler biomass charcoal powder that dusts, quality yield and can measure
Rate is high, and production cost is low.
A second object of the present invention is to provide a kind of resulting boiler biomass charcoal powders that dusts of above-mentioned preparation method.
In order to achieve the goal above, the technical scheme adopted by the invention is that:
A kind of preparation method for the boiler biomass charcoal powder that dusts, including the following steps:
1) nitrogen is passed through into retort to be made in furnace for after anaerobic or low-oxygen environment, by biomass raw material particle from retort
Top feed, thermal current enter from charing furnace bottom, and countercurrent reaction region is formed in furnace；The reaction temperature of control charing furnace bottom
Degree is 200~280 DEG C, and furnace pressure is 1010~1200mbar, and charing furnace bottom reaction generates biomass carbon fuel；
2) biomass carbon fuel obtained by step 1) is ground to 100~200 mesh to get biomass charcoal powder.
The low-oxygen environment refers to oxygen volumn concentration lower than 10%.
In the step 1) of above-mentioned preparation method, the biomass carbon fuel of generation is reacted out of charing furnace bottom output, furnace
The fuel gas of generation is discharged from retort top.For the fuel gas after condensation process, burning generates thermal current as charcoal
Change the heat source of furnace.
The condensation is condensed using cooling water, and the temperature of gas is 51~60 DEG C before condensing, gas after condensation
Temperature is 40~50 DEG C.Condensing products therefrom main component is vinegar liquid.
For the fuel gas successively after dedusting, condensation, purified treatment, burning generates heat of the thermal current as retort
Source.Dedusting described herein is dusted using cyclone dust collectors, the solids such as the carbon particle of removal fuel gas carrying and dust
The phenomenon that impurity reduces the content of solid impurity in the gas for entering condenser, not only avoids condenser internal incrustation, is reduced
The content of solid impurity, improves the quality of condensable product in condensed fluid；Meanwhile by the gas fuel burning of dedusting
When, the phenomenon that gas burning is uneven, efficiency of combustion is not high or even detonation is avoided, the hot stream temperature into retort is made
Controllably, the stability of system operation is improved.The purification is that adsorption cleaning is carried out using absorber, and removal condenser fails to locate
Reason, the droplet that is carried out by air-flow, further purify fuel gas, improve the efficiency of subsequent combustion and uniform
Property, further increase the stability into controllability and the system operation of the hot stream temperature of retort.
Combustion-supporting gas is passed through or in such a way that burning zone rear portion is passed through nitrogen auxiliary heating system or in burning
The temperature of thermal current is controlled, to control the pyrolysis reaction temperature of charing furnace bottom.The combustion-supporting gas is air.
The auxiliary heating system is electric heating or is passed through combustion of natural gas heating.The additional amount of air is according to pyrolysis gas
Flow signal automatically control, with guarantee burning be normally carried out.To control combustion gas Outlet Gas Temperature (hot stream temperature),
According to temperature signal, heating is assisted when temperature is low, the nitrogen of certain flow is added when temperature is high, to guarantee to enter the heat of retort
Gas flow temperature is stablized.
The biomass raw material particle is prepared by following methods: biomass material is crushed to partial size < 3mm, by
It is molded to partial size < 15mm to get.0.25~0.40g/cm of heap density of gained biomass raw material particle3。
The biomass material can be all types of lignocellulosic materials.Preferably, the biomass material is
Corn stover, timber, peanut shell or cotton stalk.
Moisture content < 20% of the biomass raw material particle.
In the preparation method of the boiler biomass charcoal powder that dusts, residence time of the material in retort be 1~
6h。
Biomass carbon fuel obtained by step 1) is graininess, partial size < 15mm, moisture content < 5%.
One kind is dusted boiler biomass charcoal powder, is prepared by the method included the following steps:
1) nitrogen is passed through into retort to be made in furnace for after anaerobic or low-oxygen environment, by biomass raw material particle from retort
Top feed, thermal current enter from charing furnace bottom, and countercurrent reaction region is formed in furnace；The reaction temperature of control charing furnace bottom
Degree is 200~280 DEG C, and furnace pressure is 1010~1200mbar, and charing furnace bottom reaction generates biomass carbon fuel；
2) biomass carbon fuel obtained by step 1) is ground to 100~200 mesh to get biomass charcoal powder.
The preparation method of the boiler biomass charcoal powder that dusts of the invention is that biomass first is made using low-temperature carbonization technique
Charcoal fuel, then biomass charcoal powder is made using grinding technics；When preparing biomass carbon fuel, with N2Make carrier gas, starts to be passed through N2
Guarantee in retort to be anaerobic or low-oxygen environment, then biomass raw material particle is delivered in retort；It is initial to utilize auxiliary
The thermal current that heating system generates provides heat as starting heat source for pyrolysis charring reaction；Biomass raw material particle is by self weight
Drop to bottom at the top of from retort, thermal current rises to top from charing furnace bottom, and the two directly contacts, in vertical direction
Adverse current is mobile and forms sustained response region.The pyrolysis reaction temperature of control charing furnace bottom is 200~280 DEG C, furnace pressure
For 1010~1200mbar (absolute pressure), temperature gradient is maintain in retort, temperature gradually rises from top to bottom, and biomass is made to exist
Dry, pre- pyrolysis, pyrolysis and carbonization stage are successively realized in furnace in motion process from top to bottom, to generate biomass in furnace bottom
Charcoal fuel is exported from furnace bottom.In preparation process, feed particles are directly contacted with thermal current, and efficiency of heating- utilization is high；Carbonization temperature
It is low, energy consumption is reduced, the generation of tar is avoided；Gained biomass carbon quality of fuel yield 70%~85%, the energy after charing
Yield 85%~95%, energy yield are high.Gained biomass carbon fuel is ground, the biomass carbon of appropriate particle size is obtained
Powder has the advantages that ignition temperature is low, integrated combustion property index is high for the boiler that dusts, and has excellent combustibility.
In preparation process, biomass raw material particle enters retort with certain rate, drops to from the movement of retort top
It during bottom, dries out dried first, feed particles continue to decline, and gradually pass through the higher region of temperature, biological at this time
Pyrolytic reaction occurs for matter, releases CO, CO2And the gases such as light component organic matter, pyrolysis complete obtained biomass carbon fuel with
Certain charcoal rate that goes out continuously is exported in furnace bottom, and the subsequent grinder that is directly entered is ground, and the company of biomass charcoal powder is realized
Continuous production.
The boiler biomass charcoal powder that dusts of the invention is with biomass (lignocellulosic materials) for raw material, and utilization is low
The biomass carbon fuel that abandoned biomass is converted to by warm charring process, then grinds again and biomass charcoal powder is made.With existing skill
Art is compared, and biomass charcoal powder of the invention has the advantage that
1. the calorific value of the biomass charcoal powder be 17~20MJ/kg, moisture content < 5%, volatile matter content be 30%~
50%, fixed carbon content is 25%~35%, and content of ashes is 10%~30%；With corn stalk raw material particle (calorific value
15.24MJ/kg, moisture content 11.96%, volatile matter content 61.02%, fixed carbon content 14.62%, content of ashes
12.40%) it compares, the calorific value of gained biomass charcoal powder and fixed carbon content improve after low-temperature carbonization and grinding, suitable more resistant to burning
Cooperate as the fuel for the boiler that dusts.
2. the ignition temperature of the biomass charcoal powder is 250~300 DEG C, integrated combustion property index is 1 × 107~4 × 107,
With excellent combustibility.
3. the biomass charcoal powder has good hydrophobic performance: under conditions of relative humidity 90%, biology of the invention
The balance water absorption of matter powdered carbon is 15%~20%, and the balance water absorption of corn stalk raw material particle is 25%；Relatively wet
Under conditions of degree 50%, the balance water absorption of biomass charcoal powder is 5%~7%, and the balance of corn stalk raw material particle absorbs water
Amount is 8.5%.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of biomass continuous pyrolysis carbonizing apparatus used in specific embodiment.
Specific embodiment
The present invention is further illustrated With reference to embodiment.
In specific embodiment, biomass continuous pyrolysis carbonizing apparatus used is as shown in Figure 1, include moving bed pyrolysis system
System, feed system, discharge system and gas recirculating system, the moving bed pyrolysis system include moving bed pyrolysis retort 1, institute
The top for stating moving bed pyrolysis retort 1 is equipped with feed inlet 1-3, bottom is equipped with discharge port 1-4；The feed system includes raw material
The discharge gate in storehouse 6, the raw material cabin 6 passes through first pipe and the feed inlet 1-3 phase that 1 top of moving bed pyrolysis retort is arranged in
It connects, is additionally provided with screw conveyor on first pipeline, for the raw material of raw material cabin 6 to be sent into moving bed pyrolysis retort 1；
The discharge system includes finished product storage tank 7, and the import of the finished product storage tank 7 by the second pipeline and is arranged in moving bed pyrolysis charcoal
The discharge port 1-4 for changing 1 bottom of furnace is connected；The screw conveyor with cooling system is additionally provided on second pipeline.
The biomass continuous pyrolysis carbonizing apparatus is a closed interior circulating reaction system, first pipeline close into
Valve group 8 is equipped at material mouth 1-3, valve group 8 includes 2 automatic valves 8-1, the 8-2 set gradually, and the second pipeline is close to discharging
Valve group 9 is equipped at mouth 1-4, valve group 9 includes 2 automatic valves 9-1, the 9-2 set gradually, passes through the friendship of upper and lower valve
Be staggered close realize operation when equipment it is closed；Material bed material level detector (material is additionally provided with inside the moving bed pyrolysis retort 1
Position laser probe, is not drawn into figure), for detecting material bed material position and feeding back to PLC automatic control system, by PLC from
Dynamic networked control systems control feed inlet, the realization automatic feed of automatic valve group 8,9 of discharge outlet and/or self-emptying.
The gas recirculating system includes cyclone dust collectors 2, condenser 3, absorber 4 and is heated at reflux device 5, the whirlwind
The gas feed 2-1 of deduster 2 is connected with the pyrolysis gas outlet 1-2 of moving bed pyrolysis retort 1, the gas of cyclone dust collectors 2
Body outlet 2-2 is connected with the gas feed 3-1 of the condenser 3, and the bottom of cyclone dust collectors 2 is additionally provided with collects for being discharged
The dust of dust exports 2-3；The gas vent 3-2 of condenser 3 is connected with the gas feed 4-1 of absorber 4, condenser 3
Bottom is additionally provided with the leakage fluid dram 3-3 for condensed fluid to be discharged；The gas vent 4-2 of absorber 4 passes through third pipeline and reflux
The fuel gas inlet 5-1 of heater 5 is connected, and the bottom of the absorber 4 is additionally provided with the leakage fluid dram 4- for adsorbent to be discharged
3, the circulating pump for combustion gas circulation is additionally provided on the third pipeline；The hot gas outflux 5-2 of device 5 is heated at reflux by the 4th
Pipeline is connected with the thermal current import 1-1 of moving bed pyrolysis retort 1, is additionally provided with electric T-shaped valve on the 4th pipeline
10, which is connected with the exhaust emission pipeline for emission.
Described be heated at reflux on device 5 is additionally provided with supplement fuel inlet 5-5 (auxiliary heating system), combustion-supporting gas import 5-3
With nitrogen inlet 5-4, be separately connected natural gas line, air line and nitrogen pipeline, the natural gas line, air line and
Electrically operated valve 13,11,12 is respectively equipped on nitrogen pipeline, for being heated at reflux device for natural gas and/or air and/or nitrogen
Gas.
The biomass continuous pyrolysis carbonizing apparatus, according to the material bed material level detector inside moving bed pyrolysis retort 1
Detectable signal starts screw conveyor and automatic valve group 8 by PLC automatic control system once detection material position is insufficient, former
Expect that particle quantitative enters between two valves, then according to time interlock, closes upper valve, open lower part valve, automatically
Charging；Pyrolysis is completed, and automatic valve group 9 is started, and product quantitatively enters between two valves, then according to time interlock, is closed
Upper valve is closed, lower part valve, self-emptying are opened.Automatic feed and self-emptying are controlled by PLC automatic control system
Realize the continuity of equipment operation.
In the biomass continuous pyrolysis carbonizing apparatus, device 5 is heated at reflux equipped with combustion-supporting gas import 5-3, nitrogen inlet
5-4 and supplement fuel inlet 5-5 (auxiliary heating system), import all use tangential admission, the additional amount of combustion-supporting gas (air)
It is the flow signal automatic control according to pyrolysis gas, to guarantee being normally carried out for burning.The reaction temperature of moving bed pyrolysis retort 1
Degree is according to temperature signal, in the nitrogen or supplement fuel for being heated at reflux 5 burning zone rear portion of device addition certain flow, to guarantee charcoal
The temperature for changing furnace is stablized.
The pressure of the biomass continuous pyrolysis carbonizing apparatus is automatically controlled by PLC automatic control system, in order to maintain furnace
The stabilization of body pressure discharges part of smoke.
In specific embodiment, biomass raw material particle used is prepared by following methods: by biomass material powder
Be broken to partial size < 3mm, by compression moulding to partial size < 1cm to get, gained biomass raw material particle heap density 0.25~
0.40g/cm3.Moisture content < 20% of the biomass raw material particle.
In specific embodiment, the purity of nitrogen used is not less than 99%.
In specific embodiment, grinding uses the high pressure ultrathin Raymond powder mill of Zhengzhou Central Region Machinery Manufacturing Co., Ltd..
Embodiment 1
The preparation method of the boiler biomass charcoal powder that dusts of the present embodiment is carbonized using above-mentioned biomass continuous pyrolysis
Device includes the following steps:
1) nitrogen is passed through into retort to be made in furnace for anaerobic or low-oxygen environment (oxygen volumn concentration is lower than 10%),
By corn stalk raw material particle from retort top feed, flow automatically downwards by its own gravity；Thermal current from charing furnace bottom
Into, from bottom rise to top, in furnace formed countercurrent reaction region；Pass through the reaction temperature of hot gas flow control retort bottom
Degree is 220 DEG C, furnace pressure 1050mbar, and residence time of the material in furnace is 5h, reacts the biomass carbon fuel of generation
From charing furnace bottom output, the fuel gas generated in furnace is discharged from the pyrolysis gas outlet of retort.
2) by biomass carbon fuel obtained by step 1) be ground to 100~200 mesh to get.
In the step 1) of above-mentioned preparation method, temperature gradient is maintain in retort, temperature gradually rises from top to bottom, makes
Biomass successively realizes dry, pre- pyrolysis, pyrolysis and carbonization stage in motion process from top to bottom in furnace, thus raw in furnace bottom
At biomass carbon fuel, exported from furnace bottom；
Initial thermal current is generated by auxiliary heating system, and the auxiliary heating system is to be passed through day to being heated at reflux in device
Right gas (supplement fuel) burning；The fuel gas generated in subsequent furnace successively after dedusting, condensation, purified treatment, adds in reflux
Hot device burning generates heat source of the thermal current as retort；It is (empty that combustion-supporting gas is passed through by auxiliary heating system or in burning
Gas) or at burning zone rear portion it is passed through nitrogen, to control the pyrolysis reaction temperature of charing furnace bottom.
The condensation is condensed using cooling water, and the temperature of gas is 51~60 DEG C before condensing, gas after condensation
Temperature is 40~50 DEG C.Condensing products therefrom main component is vinegar liquid.
The technical parameter of the preparation process of the boiler biomass charcoal powder that dusts of embodiment 2-8 is as shown in table 1, remaining is the same as real
Apply example 1.
The technical data sheet of the boiler biomass charcoal powder preparation process of dusting of 1 embodiment 2-8 of table
| Embodiment | Biomass material | Reaction temperature (DEG C) | Furnace pressure (absolute pressure, mbar) | Residence time of material (h) |
| 2 | Corn stover | 240 | 1100 | 4 |
| 3 | Corn stover | 250 | 1150 | 3 |
| 4 | Corn stover | 270 | 1200 | 1 |
| 5 | Corn stover | 200 | 1010 | 6 |
| 6 | Peanut shell | 220 | 1050 | 5 |
| 7 | Cotton stalk | 220 | 1050 | 5 |
| 8 | Sawdust | 220 | 1050 | 5 |
Experimental example 1
This experimental example is counted and is detected to biomass charcoal powder obtained by embodiment 1-8.
Detection method and instrument are as follows:
Thermogravimetric and combustion characteristic analysis: using the STA449F3 synchronous solving of NETZSCH instrument company of Germany
(Thermogravimetric Analyzer)。
Heating-value determination: calorimeter (Zhengzhou Heng Ya instrument and meter Co., Ltd, HY-A9) and electronic balance (Shenzhen are used
Endless weighing apparatus Co., Ltd, MAX-A6002).
Quality yield and energy yield: quality yield ηmWith energy conversion rate ηeCalculation formula it is as follows,
In formula: m1And Q1Indicate material quality and low heat valve, m2And Q2Indicate biomass charcoal powder quality and low level fever
Amount.
The results are shown in Table 2.Wherein, the raw material is corn stalk raw material particle.
The testing result of biomass charcoal powder obtained by 2 embodiment 1-8 of table
From table 2 it can be seen that biomass charcoal powder of the invention is with higher empty dry compared with corn stalk raw material particle
Base Lower heat value；For feed particles in low temperature pyrogenation carbonization process, the pyrolysis gas of generation has taken away the energy of a part, but should
Biomass charcoal powder saves most of energy of corn stalk raw material, quality yield and energy yield with higher.
The present invention is for the purpose of obtaining solid fuel charcoal, control " Coal Quality is classified third portion: calorific value " (GB/
T15224.3-2010), biomass charcoal powder of the invention is equivalent to middle lower calorific value coal.Compare " biomass solid formed fuel skill
Art condition " (NY/T 1878-2010), the calorific value of biomass charcoal powder of the invention is than draft biolobic material solid molding fuel
Calorific value it is high, the calorific value of biomass charcoal powder is higher than draft biolobic material solid molding fuel standard when 240 DEG C (embodiment 2)
4.68MJ/kg。
Experimental example 2
This experimental example detects the combustibility of biomass charcoal powder obtained by embodiment.
Detection method and instrument are as follows:
Thermogravimetric and combustion characteristic analysis: using the STA449F3 synchronous solving of NETZSCH instrument company of Germany
(Thermogravimetric Analyzer)。
Industrial Analysis: Muffle furnace (Shanghai Kai Lang instrument and equipment factory, SX2-4-10) and drying box (the prosperous baking in Wujiang Fujian are used
Case electric furnace Manufacturing Co., Ltd, MX841-6).
Elemental analysis: Elementar company of Germany, vario EL type III elemental analyser are used.
The results are shown in Table 3.
The combustibility testing result of biomass charcoal powder obtained by 3 embodiment of table
From table 3 it can be seen that the ignition temperature of biomass charcoal powder obtained by embodiment 1-8 is lower than charcoal (487.2 DEG C) and burns
Roasting charcoal (361.7 DEG C), more easy firing, integrated combustion property index are higher than charcoal (1.461), are lower than charcoal for roasting (3.405), have
Excellent combustibility, the fuel for the boiler that is suitable as dusting.
Claims (7)
1. a kind of preparation method for the boiler biomass charcoal powder that dusts, it is characterised in that: include the following steps:
1) nitrogen is passed through into retort to be made in furnace for after anaerobic or low-oxygen environment, by biomass raw material particle at the top of retort
Charging, thermal current enter from charing furnace bottom, and countercurrent reaction region is formed in furnace；Control charing furnace bottom reaction temperature be
200~280 DEG C, furnace pressure is 1010~1200mbar, and charing furnace bottom reaction generates biomass carbon fuel；
2) biomass carbon fuel obtained by step 1) is ground to 100~200 mesh to get biomass charcoal powder；
In the step 1) of above-mentioned preparation method, temperature gradient is maintain in retort, temperature gradually rises from top to bottom, makes biology
Matter feed particles successively realize dry, pre- pyrolysis, pyrolysis and carbonization stage in motion process from top to bottom in furnace, avoid tar
Generation.
2. the preparation method of the boiler biomass charcoal powder according to claim 1 that dusts, it is characterised in that: the biomass
Feed particles are prepared by following methods: biomass material is crushed to partial size < 3mm, by compression moulding to partial size <
15mm to get.
3. the preparation method of the boiler biomass charcoal powder according to claim 2 that dusts, it is characterised in that: the biomass
Raw material is corn stover, timber, peanut shell or cotton stalk.
4. the preparation method of the boiler biomass charcoal powder according to claim 2 that dusts, it is characterised in that: the biomass
Moisture content < 20% of feed particles.
5. the preparation method for the boiler biomass charcoal powder that dusts described in any one of -4 according to claim 1, it is characterised in that:
Residence time of the material in retort is 1~6h.
6. the preparation method of the boiler biomass charcoal powder according to claim 1 that dusts, it is characterised in that: obtained by step 1)
Biomass carbon fuel is graininess, partial size < 15mm, moisture content < 5%.
The boiler biomass charcoal powder 7. one kind is dusted, it is characterised in that: prepared by the method included the following steps:
1) nitrogen is passed through into retort to be made in furnace for after anaerobic or low-oxygen environment, by biomass raw material particle at the top of retort
Charging, thermal current enter from charing furnace bottom, and countercurrent reaction region is formed in furnace；Control charing furnace bottom reaction temperature be
200~280 DEG C, furnace pressure is 1010~1200mbar, and charing furnace bottom reaction generates biomass carbon fuel；
2) biomass carbon fuel obtained by step 1) is ground to 100~200 mesh to get biomass charcoal powder；
In the step 1) of above-mentioned preparation method, temperature gradient is maintain in retort, temperature gradually rises from top to bottom, makes biology
Matter feed particles successively realize dry, pre- pyrolysis, pyrolysis and carbonization stage in motion process from top to bottom in furnace, avoid tar
Generation.
Priority Applications (1)
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| CN1629256A (en) * | 2004-08-25 | 2005-06-22 | 胡福昌 | Method and device for dry distillation and charring of internal combustion self-heating moving bed |
| CN102002376A (en) * | 2010-11-23 | 2011-04-06 | 邢献军 | Method for preparing biological coal |
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| EP2883943A1 (en) * | 2013-12-16 | 2015-06-17 | Arigna Fuels Limited | Manufacture of fuel briquettes from thermally processed biomass |
| CN105038825A (en) * | 2015-07-17 | 2015-11-11 | 国际竹藤中心 | Production method of energy self-sustaining bamboo biomass roasting charcoal |
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| CN1629256A (en) * | 2004-08-25 | 2005-06-22 | 胡福昌 | Method and device for dry distillation and charring of internal combustion self-heating moving bed |
| CN102002376A (en) * | 2010-11-23 | 2011-04-06 | 邢献军 | Method for preparing biological coal |
| CN103242928A (en) * | 2012-02-03 | 2013-08-14 | 中国钢铁股份有限公司 | Method for producing biomass coal |
| EP2883943A1 (en) * | 2013-12-16 | 2015-06-17 | Arigna Fuels Limited | Manufacture of fuel briquettes from thermally processed biomass |
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| CN105038825A (en) * | 2015-07-17 | 2015-11-11 | 国际竹藤中心 | Production method of energy self-sustaining bamboo biomass roasting charcoal |
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