CN108977228A - Biomass oxygen-rich gasification method and system - Google Patents
Biomass oxygen-rich gasification method and system Download PDFInfo
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- CN108977228A CN108977228A CN201810872244.7A CN201810872244A CN108977228A CN 108977228 A CN108977228 A CN 108977228A CN 201810872244 A CN201810872244 A CN 201810872244A CN 108977228 A CN108977228 A CN 108977228A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/50—Fuel charging devices
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/86—Other features combined with waste-heat boilers
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0903—Feed preparation
- C10J2300/0906—Physical processes, e.g. shredding, comminuting, chopping, sorting
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/0916—Biomass
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0956—Air or oxygen enriched air
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Abstract
The present invention provides a kind of biomass oxygen-rich gasification method and system, method includes the following steps: (1) crushes biomass material using fuel pulverizing plant；(2) oxygen-enriched air is prepared；(3) biomass powder is sent into the feed inlet of gasification furnace, meanwhile, oxygen-enriched air is sent into feed inlet, biomass powder and oxygen-enriched air and is mixed to form wind powder mixture in the feed inlet of gasification furnace；(4) high-temperature gasification reaction occurs into the intracorporal wind powder mixture of the furnace of gasification furnace, the high-temperature fuel gas of generation enters aftertreatment device and handled, and the biomass ash of generation is discharged with molten condition from the slag-drip opening of the gasification furnace；Wherein, the gasification temperature of gasification furnace is 1000-1600 DEG C.The present invention can solve in the prior art the problems such as fuel gases calorific value is low, tar is more, ash erosion and gasification efficiency are low.
Description
Technical field
The present invention is about gasification of biomass field more particularly to a kind of biomass oxygen-rich gasification method and system.
Background technique
Biomass energy is the solar energy that plant is fixed up by photosynthesis, has storage capacity big, widely distributed is excellent
Point, extensive utilization can be effectively relieved energy crisis and reduce environmental pollution.Compared with other renewable energy, biomass is most
Prominent advantage is that it is unique reproducible carbon source, and either energy field or chemical field, biomass may be implemented
To comprehensive substitution of fossil fuel.
Gasification is one of important way of Biomass Energy Utilization, is the mistake for solid biomass material being converted into combustible gas
Journey, for the use of gas turbine power generation, fuel cell power generation and industrial chemicals.At this stage, the type of gasifier is broadly divided into: Gu
Fixed bed gasification furnace, fluidized-bed gasification furnace and airflow bed gasification furnace.However, since biomass ash fusion point is low, using fixed bed and
When fluidized-bed gasification furnace, easy the problems such as slagging occurs, the temperature of gasification furnace is limited, so that gasification efficiency is low, fuel gases calorific value is low,
And due to lower temperature, so that containing a large amount of tar in combustion gas, pipeline is blocked, tar subtractive process be easy to cause secondary dirt
Dye.Air flow bed makes it have the advantages that the intensity of gasification is high, gasification efficiency is high, it is low to produce gas tar content due to there is higher gasification temperature,
It is the mode for being most suitable for biomass and gasifying on a large scale, still, due to the physical property of biomass, feed problems are unable to get effectively
It solves, biomass entrained flow bed gasification technology only rests on the experimental stage.
Summary of the invention
Therefore, existing to solve one of the objects of the present invention is to provide a kind of biomass oxygen-rich gasification method and system
Fuel gases calorific value is low in technology, tar is more, slagging, the problems such as gasification efficiency is low and gasification temperature is not high are easy in furnace.
In order to achieve the above object, the present invention provides a kind of biomass oxygen-rich gasification method, the biomass oxygen-rich gasification method packet
Include following steps:
(1) biomass material is crushed using fuel pulverizing plant, and sieves and obtains the biomass powder that granularity is less than 0.2mm；
(2) oxygen-enriched air is prepared, which is the oxygen-enriched air that oxygen-containing volumetric concentration is 30-40%；
(3) biomass powder is sent into the feed inlet of gasification furnace, meanwhile, which is sent into the charging of the gasification furnace
Mouth, the biomass powder and oxygen-enriched air are mixed to form wind powder mixture in the feed inlet of the gasification furnace；
(4) high-temperature gasification reaction occurs into the intracorporal wind powder mixture of the furnace of the gasification furnace, after the high-temperature fuel gas of generation enters
Continuous processing unit is handled, and the biomass ash of generation is discharged with molten condition from the slag-drip opening of the gasification furnace；Wherein, the gasification
The gasification temperature of furnace is 1000-1600 DEG C.
As optional technical solution, the oxygen-containing volumetric concentration of the oxygen-enriched air is adjustable, in the step (3), when the gas
When change furnace in-furnace temperature reaches 1100 DEG C, the oxygen-containing volumetric concentration of the oxygen-enriched air is adjusted to 30%, when warm in the gasification furnace furnace
When degree reaches 1200 DEG C, the oxygen-containing volumetric concentration of the oxygen-enriched air is adjusted to 35%, when the gasification furnace in-furnace temperature is more than 1500
DEG C when, the oxygen-containing volumetric concentration of the oxygen-enriched air is adjusted to 40%.
As optional technical solution, powder of the partial size less than 0.177mm accounts for the biomass powder in the biomass powder
The 80% of total amount.
The present invention also provides a kind of biomass oxygen-rich gasification systems, which includes: fuel pulverizing plant,
To be crushed to biomass material, and sieves and obtain the biomass powder that granularity is less than 0.2mm；Gasification installation, the gasification
Device includes gasification furnace, and the middle and lower part of the gasification furnace has feed inlet and slag-drip opening, and the gasification temperature of the gasification furnace is
1000-1600℃；Charging gear, the biomass powder is sent into the gasification furnace from the feed inlet of the gasification furnace；It is oxygen-enriched
Device, to prepare oxygen-enriched air and the oxygen-enriched air be sent into the feed inlet of the gasification furnace, and the oxygen-enriched air be containing
Oxygen volumetric concentration is the oxygen-enriched air of 30-40%；Wherein, feed inlet of the biomass powder and the oxygen-enriched air gasification furnace
It is mixed to form wind powder mixture, that high-temperature gasification occurs in the gasification furnace is anti-into the wind powder mixture of the furnace body of the gasification furnace
It answers, the high-temperature fuel gas of generation enters aftertreatment device and handled, and the biomass ash of generation is with molten condition from the slag-drip opening
Discharge.
As optional technical solution, it is arranged on the gasification furnace there are four the feed inlet, four feed inlets are uniformly distributed
In on the wall body of the gasification furnace, each feed inlet is connected to the charging gear and the oxygen-enriching device, and each feed inlet
Place is provided with burner, and two neighboring burner is in 90 degree of settings in four burners, so that the fire of four burners
Flame is around annular is formed, to form eddy flow among the furnace body of the gasification furnace.
As optional technical solution, which includes sequentially connected gasification furnace, cyclone separator, vertical waste heat
Boiler, indirect cooling furnace, air cooling tower, air-introduced machine, water seal arrangement and gas holder, the high-temperature fuel gas come out from the gasification furnace is through the rotation
Enter the vertical exhaust-heat boiler after the processing of wind separator and carry out heat exchange, it is indirectly cold that the combustion gas after heat exchange sequentially enters this
But furnace and the air cooling tower are cooled down, and are finally introduced the water seal arrangement by the air-introduced machine and are entered gas holder preservation.
As optional technical solution, which further includes oxygen content adjuster, to adjust the oxygen-enriched air
Oxygen-containing volumetric concentration, when the gasification furnace in-furnace temperature reaches 1100 DEG C, the oxygen content adjuster is by the oxygen-containing of the oxygen-enriched air
Volumetric concentration is adjusted to 30%, and when the gasification furnace in-furnace temperature reaches 1200 DEG C, the oxygen content adjuster is by the oxygen-enriched air
Oxygen-containing volumetric concentration is adjusted to 35%, and when the gasification furnace in-furnace temperature is more than 1500 DEG C, the oxygen content adjuster is by the oxygen-enriched sky
The oxygen-containing volumetric concentration of gas is adjusted to 40%.
As optional technical solution, powder of the partial size less than 0.177mm accounts for the biomass powder in the biomass powder
80%.
As optional technical solution, which is vertical spin charging gear, comprising: screw feeder, stepless
Speed regulating motor, hopper, scraper plate, powder sinking tube；The powder sinking tube is located at below the hopper, which is set to the powder sinking tube
In, lower part is provided with the scraper plate in the hopper, and the stepless time adjustment motor is by interlocking the axis connection scraper plate and the screw feeder.
As optional technical solution, which further includes volume adjusting apparatus, is connected to the powder sinking tube lower end, should
Volume adjusting apparatus enters the concentration and flow of the wind powder mixture of the gasification furnace to adjust.
As optional technical solution, which further includes having nozzle, and the outlet of the nozzle is set to this and falls
At the position of center line of tube cell.
Compared with prior art, biomass oxygen-rich gasification method and system of the invention have the advantage that
(1) biomass is broken into the powder of appropriate granularity, increases the specific surface area of powder fuel, and biomass powder fires
Material has hole pattern fibre structure, can greatly improve oxygen diffusion rate, is conducive to the precipitation for improving rhermal decomposition rate and fugitive constituent,
And then improve gasification rate and intensity；
(2) powder of the invention gasifies based on gas phase, can greatly improve the vaporized state and gasification efficiency of biomass, mitigates knot
Slag corrosion phenomenon promotes the grade of combustion gas；
(3) moreover, in the present invention, the gasification temperature of biomass can be increased to 1400 DEG C or more, biomass can be increased substantially
The application energy level and expansion application range of energy, can be widely applied to the industries such as power generation, metallurgy, cement, ceramics.
It can be obtained further by detailed description of the invention below and institute's accompanying drawings about the advantages and spirit of the present invention
Solution.
Detailed description of the invention
Fig. 1 show the schematic diagram of biomass oxygen-rich gasification system according to the present invention；
Fig. 2 show the schematic diagram of gasification installation according to the present invention；
Fig. 3 show the burner of gasification installation according to the present invention and the setting structure schematic diagram of gasification furnace.
Specific embodiment
Referring to Figure 1-3, Fig. 1 show the schematic diagram of biomass oxygen-rich gasification system according to the present invention, and Fig. 2 is shown
The schematic diagram of gasification installation according to the present invention, Fig. 3 show the burner and gasification furnace of gasification installation according to the present invention
Setting structure schematic diagram.The present invention provides a kind of biomass oxygen-rich gasification system, which includes powder processed
Device, gasification installation, charging gear 2 and oxygen-enriching device 3, gasification installation include gasification furnace 1.Fuel pulverizing plant is to biomass
Raw material is crushed, and is sieved and obtained the biomass powder that partial size is less than 0.2mm.Because in general, diameter of particle is smaller, oxygen
Diffusion rate is more conducive to the precipitation for improving rhermal decomposition rate and fugitive constituent, but broken granularity is smaller, and cost also can be corresponding
Increase, so comprehensively considering broken cost and combustion efficiency, the biomass powder partial size in the present invention is less than 0.2mm.And preferably
Ground, powder of the partial size less than 0.177mm accounts for the 80% of the biomass powder, the most economical rationality in biomass powder.
In addition, having feed inlet 11 and slag-drip opening 12 in the middle and lower part of gasification furnace 1, also set on the top of gasification furnace 1
It is equipped with gas outlet 13.And as shown in figure 3, in the present embodiment, there are four feed inlets 11 for setting on gasification furnace 1, this four
A feed inlet 11 is uniformly distributed on the wall body of gasification furnace 1, and each feed inlet 11 is connected to charging gear 2 and oxygen-enriched
Device 3, and burner is provided at each feed inlet 11, two neighboring combustion in four burners 111,112,113,114
Burner is in 90 degree of settings, so that the flame of four burners 111,112,113,114 is around circle is formed, each flame is in circle
Tangent line at, to form eddy flow among the furnace body of gasification furnace 1, can so increase current rate and promote in-furnace temperature, one
Vigorous reaction can occur for denier biomass powder entrance.And burner is so set, make biomass powder and oxygen-enriched air
Wind powder mixture can in burner hearth rotary combustion, extend the residence time, improve heat-transfer effect, keep fire box temperature distribution equal
It is even, to sufficiently thoroughly fully burn, release more efficient heats.Moreover, preferably, the gasification temperature of gasification furnace 1 is
1000-1600 DEG C, higher gasification temperature can increase substantially application energy level and the application range of biomass energy, such as can be extensive
Applied to industries such as power generation, metallurgy, cement, ceramics.
Wherein, charging gear 2 is then to be sent into gasification furnace body 14 from the feed inlet 11 of gasification furnace 1 for biomass powder
It is interior.Oxygen-enriching device 3 is to prepare oxygen-enriched air and oxygen-enriched air is sent into the feed inlet 11 of gasification furnace 1, wherein oxygen-enriched air
The oxygen-enriched air for being 30-40% for oxygen-containing volumetric concentration.The present invention can reduce air excess system instead of air-breathing using oxygen-enriched
Number, had not only improved flame temperature in this way but also can reduce flue gas loss, and fuel consumption is just corresponding to be reduced, thus energy saving.
Biomass powder and oxygen-enriched air are mixed to form wind powder mixture in the feed inlet 11 of gasification furnace 1, into gasification furnace
High-temperature gasification reaction, the combustion gas of the high-temperature fuel gas of generation from gasification furnace 1 occur in gasification furnace 1 for the wind powder mixture in furnace body 14
Enter aftertreatment device after 13 discharge of outlet to be handled, such as can be and be fed directly to user terminal or through waste heat boiler
Room temperature is dropped to through cooling again after heat exchange cooling, and room temperature fuel gas transmission to gas holder is stored；The biomass ash of generation is then with melting
State is discharged from slag-drip opening 12.
In addition, as shown in Fig. 2, above-mentioned gasification installation include sequentially connected gasification furnace 1, it is cyclone separator 101, vertical remaining
Heat boiler 102, indirect cooling furnace 103, air cooling tower 104, air-introduced machine 105, water seal arrangement 106 and gas holder 107, from gasification furnace 1
High-temperature fuel gas out enters vertical exhaust-heat boiler 102 after cyclone separator 101 carries out gas solid separation processing and carries out heat exchange,
Combustion gas after heat exchange sequentially enters indirect cooling furnace 103 and air cooling tower 104 is cooled down, finally by air-introduced machine 105
Enter the preservation of gas holder 107 after introducing water seal arrangement 106.Wherein, the setting of water seal arrangement 106 can be by water seal arrangement 106
Water level adjusting come control cutting of the combustion gas between air-introduced machine 105 and gas holder 107 be connected to, so may insure system of the present invention
The problems such as system is safe, to avoid gas leakage.
Moreover, oxygen-enriching device 3 further includes oxygen content adjuster, to adjust containing for the oxygen-enriched air in present embodiment
Oxygen volumetric concentration.It is such as preferably, when the gasification furnace in-furnace temperature reaches 1100 DEG C, the oxygen-containing volume of the oxygen-enriched air is dense
Degree is adjusted to 30%, and when the gasification furnace in-furnace temperature reaches 1200 DEG C, the oxygen-containing volumetric concentration of the oxygen-enriched air is adjusted to
35%, when 1 in-furnace temperature of gasification furnace is more than 1500 DEG C, the oxygen-containing volumetric concentration of the oxygen-enriched air is adjusted to 40%.This hair
It is bright the experiment proved that, with the increase of oxysome fraction, the volatile matter of biology powder fuel just Precipitation Temperature, ignition temperature and
Burn-out temperature constantly reduces, combustibility enhancing；Average and biggest quality loss rate is in increase trend, improves combustion intensity.
But oxygen-enriched cost also will increase dramatically therewith, and aforesaid way of the invention is used to carry out the penetrating of oxygen-enriched air the most
Economical rationality.
In present embodiment, charging gear 2 is vertical spin charging gear, including screw feeder 24, stepless speed regulation electricity
Machine 21, hopper 27, scraper plate 23, powder sinking tube 28；It, middle powder sinking tube 28 is located at 27 lower section of hopper, and screw feeder 24, which is set to, to be fallen
In tube cell 28, lower part is provided with scraper plate 23 in hopper 27, and stepless time adjustment motor 21 then connects scraper plate 23 and spiral shell by couple axle 22
Revolve dispenser 24.In addition, oxygen-enriching device 3 further includes volume adjusting apparatus, it is connected to 28 lower end of powder sinking tube, and volume adjusting apparatus
To adjust the concentration and flow that enter the wind powder mixture of gasification furnace 1.Wherein, when the concentration of wind powder mixture (powder matter
The ratio between amount and air quantity, g/m3), when higher, it may appear that fed oxygen from air is insufficient, burns extremely insufficient, and is easy to appear in igniting
Explosion phenomenon, moment pressure is bigger in furnace；And when the concentration of wind powder mixture is too low, and it is not easy to keep continual and steady combustion
Burning state, and temperature is relatively low；So the present invention comprehensively considers igniting, temperature and flue gas many factors, passes through by test
The concentration of wind powder mixture is maintained 240-270 g/m by volume adjusting apparatus3, the most properly.
Moreover, powder sinking tube 28 is also connected with feed pipe 26, feed pipe 26 is also connected to volume adjusting apparatus.Volume adjusting apparatus
It further include having nozzle 25, the outlet of nozzle 25 is set at the position of center line of the powder sinking tube 28.Negative pressure is maximum at this time, can make
Powder falling bottom of the tube forms negative pressuren zone, leads to not blanking or the non-uniform phenomenon of blanking due to without regurgitating.In addition, this hair
Bright charging gear 2 connects scraper plate 23 and screw feeder 24 by couple axle 22, and is sealed to charging gear, will not
Increase meaningless power consumption, and powder splashing will not be generated and cause working environment bad etc..
The present invention also provides a kind of biomass oxygen-rich gasification method, which uses above-mentioned biomass
Oxygen-rich gasification system execute, and biomass oxygen-rich gasification method the following steps are included:
(1) biomass material is crushed using fuel pulverizing plant, and screening obtains a biomass oxygen-rich gasification method degree and is less than
The biomass powder of 0.2mm；
(2) oxygen-enriched air is prepared, which is the high-temperature oxygen-enriched air that oxygen-containing volumetric concentration is 30-40%；
(3) biomass powder is sent into the feed inlet of gasification furnace, meanwhile, which is sent into the charging of the gasification furnace
Mouth, the biomass powder and oxygen-enriched air are mixed to form wind powder mixture in the feed inlet of the gasification furnace；
(4) high-temperature gasification reaction occurs into the intracorporal wind powder mixture of the furnace of the gasification furnace, after the high-temperature fuel gas of generation enters
Continuous processing unit is handled, such as be can be and be fed directly to user terminal or cool down drop again after residual heat boiler for exchanging heat cools down
It is stored to room temperature, the biomass ash of generation is then discharged with molten condition from the slag-drip opening of the gasification furnace；Wherein, the gas of the gasification furnace
Changing temperature is 1000-1600 DEG C.
Wherein, the oxygen-containing volumetric concentration of oxygen-enriched air is adjustable, in the step (3), when the gasification furnace in-furnace temperature reaches
At 1100 DEG C, the oxygen-containing volumetric concentration of the oxygen-enriched air is adjusted to 30%, when the gasification furnace in-furnace temperature reaches 1200 DEG C,
The oxygen-containing volumetric concentration of the oxygen-enriched air is adjusted to 35%, when the gasification furnace in-furnace temperature is more than 1500 DEG C, by the oxygen-enriched sky
The oxygen-containing volumetric concentration of gas is adjusted to 40%.
In conclusion biomass oxygen-rich gasification method and system of the invention, are used for oxygen-enriched combusting skill for biomass powder
Art will effectively be combined together the advantages of the two in conjunction with the structure setting of charging gear and oxygen-enriching device, reach and make the best use of the advantages
Mend short effect.The present invention is had the advantage that
(1) biomass is broken into the powder of appropriate granularity, increases the specific surface area of powder fuel, and biomass powder fires
Material has hole pattern fibre structure, can greatly improve oxygen diffusion rate, is conducive to the precipitation for improving rhermal decomposition rate and fugitive constituent,
And then improve burning velocity and intensity；
(2) powder of the invention burns based on gas-phase combustion, can greatly improve the combustion state and efficiency of combustion of biomass, subtract
Light slagging corrosion phenomenon, promotes the grade of fuel；
(3) moreover, in the present invention, the ignition temperature of biomass can be increased to 1400 DEG C or more, biomass can be increased substantially
The application energy level and expansion application range of energy, can be widely applied to the industries such as power generation, metallurgy, cement, ceramics.
By the above detailed description of preferred embodiments, it is intended to more clearly describe feature and spirit of the invention,
And not protection scope of the present invention is limited with above-mentioned disclosed preferred embodiment.On the contrary, its purpose
It is intended to cover various changes and has being arranged in the scope of protection of the claims of the invention to be applied of equality.Cause
This, the applied scope of protection of the claims of the present invention should illustrate the most wide explanation of work according to above-mentioned, to cause it
Cover the arrangement of all possible change and tool equality.
Claims (10)
1. a kind of biomass oxygen-rich gasification method, which is characterized in that the biomass oxygen-rich gasification method the following steps are included:
(1) biomass material is crushed using fuel pulverizing plant, and sieves and obtains the biomass powder that granularity is less than 0.2mm；
(2) oxygen-enriched air is prepared, which is the oxygen-enriched air that oxygen-containing volumetric concentration is 30-40%；
(3) biomass powder is sent into the feed inlet of gasification furnace, meanwhile, which is sent into the charging of the gasification furnace
Mouth, the biomass powder and oxygen-enriched air are mixed to form wind powder mixture in the feed inlet of the gasification furnace；
(4) high-temperature gasification reaction occurs into the intracorporal wind powder mixture of the furnace of the gasification furnace, after the high-temperature fuel gas of generation enters
Continuous processing unit is handled, and the biomass ash of generation is discharged with molten condition from the slag-drip opening of the gasification furnace；Wherein, the gasification
The gasification temperature of furnace is 1000-1600 DEG C.
2. biomass oxygen-rich gasification method as described in claim 1, which is characterized in that the oxygen-containing volumetric concentration of the oxygen-enriched air
It is adjustable, in the step (3), when the gasification furnace in-furnace temperature reaches 1100 DEG C, by the oxygen-containing volumetric concentration of the oxygen-enriched air
It is adjusted to 30%, when the gasification furnace in-furnace temperature reaches 1200 DEG C, the oxygen-containing volumetric concentration of the oxygen-enriched air is adjusted to 35%,
When the gasification furnace in-furnace temperature is more than 1500 DEG C, the oxygen-containing volumetric concentration of the oxygen-enriched air is adjusted to 40%.
3. biomass oxygen-rich gasification method as described in claim 1, which is characterized in that partial size is less than in the biomass powder
The powder of 0.177mm accounts for the 80% of the biomass powder total amount.
4. a kind of biomass oxygen-rich gasification system, which is characterized in that the biomass oxygen-rich gasification system includes:
Fuel pulverizing plant to crush to biomass material, and sieves and obtains the biomass powder that granularity is less than 0.2mm；
Gasification installation, the gasification installation include gasification furnace, and the middle and lower part of the gasification furnace has feed inlet and slag-drip opening, the gas
The gasification temperature for changing furnace is 1000-1600 DEG C；
Charging gear, the biomass powder is sent into the gasification furnace from the feed inlet of the gasification furnace；
Oxygen-enriching device, to prepare oxygen-enriched air and the oxygen-enriched air is sent into the feed inlet of the gasification furnace, and this is oxygen-enriched
Air is the high-temperature oxygen-enriched air that oxygen-containing volumetric concentration is 30-40%；
Wherein, the feed inlet of the biomass powder and the oxygen-enriched air gasification furnace is mixed to form wind powder mixture, into this
High-temperature gasification reaction occurs in the gasification furnace for the wind powder mixture of the furnace body of gasification furnace, and the high-temperature fuel gas of generation enters subsequent
Processing unit is handled, and the biomass ash of generation is discharged with molten condition from the slag-drip opening.
5. biomass oxygen-rich gasification system as claimed in claim 4, which is characterized in that there are four should be into for setting on the gasification furnace
Material mouth, four feed inlets are uniformly distributed on the wall body of the gasification furnace, each feed inlet be connected to the charging gear with
And the oxygen-enriching device, and burner is provided at each feed inlet, two neighboring burner is in 90 degree in four burners
Setting, so that the flame of four burners, which surrounds, forms annular, to form eddy flow among the furnace body of the gasification furnace.
6. biomass oxygen-rich gasification system as claimed in claim 4, which is characterized in that the gasification installation includes sequentially connected
Gasification furnace, cyclone separator, vertical exhaust-heat boiler, indirect cooling furnace, air cooling tower, air-introduced machine, water seal arrangement and gas holder, from this
The high-temperature fuel gas that gasification furnace comes out enters the vertical exhaust-heat boiler after cyclone separator processing and carries out heat exchange, hands over through overheat
Combustion gas after changing sequentially enters the indirect cooling furnace and the air cooling tower is cooled down, and finally introduces water seal dress by the air-introduced machine
It sets and enters gas holder preservation.
7. biomass oxygen-rich gasification system as claimed in claim 4, which is characterized in that the oxygen-enriching device further includes oxygen content tune
Device is saved, to adjust the oxygen-containing volumetric concentration of the oxygen-enriched air, when the gasification furnace in-furnace temperature reaches 1100 DEG C, the oxygen content
The oxygen-containing volumetric concentration of the oxygen-enriched air is adjusted to 30% by adjuster, and when the gasification furnace in-furnace temperature reaches 1200 DEG C, this contains
The oxygen-containing volumetric concentration of the oxygen-enriched air is adjusted to 35% by oxygen flow regulation device, when the gasification furnace in-furnace temperature is more than 1500 DEG C,
The oxygen-containing volumetric concentration of the oxygen-enriched air is adjusted to 40% by the oxygen content adjuster.
8. biomass oxygen-rich gasification system as claimed in claim 4, which is characterized in that the charging gear is vertical spin feed
Device, comprising: screw feeder, stepless speed-regulating motor, hopper, scraper plate, powder sinking tube；The powder sinking tube is located at below the hopper, should
Screw feeder is set in the powder sinking tube, and lower part is provided with the scraper plate in the hopper, which passes through couple axle
Connect the scraper plate and the screw feeder.
9. biomass oxygen-rich oxide system as claimed in claim 8, which is characterized in that the oxygen-enriching device further includes that air quantity is adjusted
Device is connected to the powder sinking tube lower end, and the volume adjusting apparatus is to adjust into the dense of the wind powder mixture of the gasification furnace
Degree and flow.
10. biomass oxygen-rich gasification system as claimed in claim 9, which is characterized in that the volume adjusting apparatus further includes having
The outlet of nozzle, the nozzle is set at the position of center line of the powder sinking tube.
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| CN201810872244.7A CN108977228A (en) | 2018-08-02 | 2018-08-02 | Biomass oxygen-rich gasification method and system |
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| CN201810872244.7A CN108977228A (en) | 2018-08-02 | 2018-08-02 | Biomass oxygen-rich gasification method and system |
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Application publication date: 20181211 |