CN108179030A - Biomass gasifying furnace and biomass gasification method - Google Patents
Biomass gasifying furnace and biomass gasification method Download PDFInfo
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- CN108179030A CN108179030A CN201810032276.6A CN201810032276A CN108179030A CN 108179030 A CN108179030 A CN 108179030A CN 201810032276 A CN201810032276 A CN 201810032276A CN 108179030 A CN108179030 A CN 108179030A
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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
- C10J3/02—Fixed-bed gasification of lump fuel
- C10J3/20—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
- C10J3/02—Fixed-bed gasification of lump fuel
- C10J3/06—Continuous processes
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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
- C10J3/02—Fixed-bed gasification of lump fuel
- C10J3/06—Continuous processes
- C10J3/16—Continuous processes simultaneously reacting oxygen and water with the carbonaceous material
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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
- C10J3/58—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels combined with pre-distillation of the fuel
- C10J3/60—Processes
- C10J3/64—Processes with decomposition of the distillation products
- C10J3/66—Processes with decomposition of the distillation products by introducing them into the gasification zone
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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
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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
- C10J2300/0913—Carbonaceous raw material
- C10J2300/094—Char
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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
- C10J2300/0943—Coke
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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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- 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
- C10J2300/0973—Water
- C10J2300/0976—Water as steam
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Abstract
The present invention provides a kind of biomass gasifying furnace and biomass gasification method.The aditus laryngis section of the biomass gasifying furnace is equipped with the first orifice layer and the second orifice layer；First orifice layer is located at the top of the second orifice layer；The axis of the first jet pipe in first orifice layer is in same level, and the axis of the first jet pipe is vertical with the axis of furnace body；The axis of the second jet pipe in second orifice layer is in same level；The angle that the section of the axis of second jet pipe and the inner wall of the furnace body of the intersection point of the inner wall of the axis and furnace body by the second jet pipe is formed is 45 75 °；The distance between axis of the axis of first jet pipe and the second jet pipe is 0.5 1 times of the internal diameter of aditus laryngis section.The biomass gasifying furnace, simple in structure, throat region uniformity of temperature profile, will not slagging, it is suitable for mass production.The biomass gasification method, calorific value height, the tar content of gained gasification gas are low.
Description
Technical field
The present invention relates to a kind of biomass gasifying furnace and biomass gasification methods.
Background technology
With global economy fast development, energy consumption levels are continuously improved, the fossil energies such as coal, oil, natural gas
Increasingly depleted.For biomass as regenerative resource, it has resourceful, widely distributed, CO2It " zero-emission " and can be efficiently sharp
With the extensive attention for having caused countries in the world.
At present, about biomass recycling use, there are mainly three types of approach：Directly burning, thermochemical study and biochemistry
Conversion.Wherein, biomass gasification technology is a kind of important thermochemical study method, and detailed process is as follows：Using biomass as original
Material, using gases such as air, vapor as gasifying agent, under the high temperature conditions, by thermal chemical reaction distillation and in height
The lower cracking of temperature generates fuel gas.In addition, biomass gasification technology, because it has higher biomass energy transformation efficiency and can
Favored with generating the products such as the higher gas of quality.
However, the biomass gasification technology of gasifying agent is used air as, although technique is relatively simple, cost is relatively low,
The gasification gas nitrogen content that it is produced is higher, and calorific value is relatively low, mostly in 4-6MJ/Nm3, utilization scope is relatively narrow, and economic benefit is bad.
With the development of oxygenerating technology, oxygen cost processed continuously decreases, during the oxygen-rich gasification technology of biomass is because that can obtain
High heating value combustion gas and CO/H2Adjustment so that expanded the application range of gasification of biomass output gas and by attention.At two sections
In formula fixed-bed gasification furnace, gullet section, which is passed through oxygen rich gas, can effectively improve the temperature of gullet section, can improve tar
Removal efficiency.At present, have pertinent literature using oxygen-enriched as gasifying agent, however do not obtain satisfactory technique effect.
Biomass fixed-bed oxygen-rich gasification stove disclosed in Chinese patent literature CN105062565A, although technique is more simple
It is single, but its charging is intermittent, it is impossible to stable continuous feed is not suitable for amplification production；In addition, its Secondary Air has burnt greatly
Active principle is measured, reduces the calorific value of gasification gas.Biomass multiple step format is oxygen-enriched disclosed in Chinese patent literature CN101164866U
Vaporizing system enters in downdraft fixed-bed gasification furnace after biomass pyrolytic and carries out oxygen-enriched combusting together for the device of synthesis gas,
Maximum temperature can reach 1300 DEG C, although temperature height is conducive to tar removing, have been over biomass slagging temperature, not
The operation of energy continuous-stable.Oxygen-enriched Biomass Gasification in Circulating Fluidized Bed system disclosed in Chinese patent literature CN103205281A,
Oxygen-rich gasification is carried out by fluid bed, although being heated evenly, gasification temperature range can effectively be kept away in the range of 600-950 DEG C
Exempt from slagging, but the temperature of 950 DEG C of highest can not effective pyrolysis fuel oil so that tar content is higher in outlet gasification gas, this
Its outer oxygen rich gas needs to be preheated to higher temperature, more wastes energy.
Invention content
The technical problems to be solved by the invention are to overcome the structure setting of biomass gasifying furnace in the prior art not
Caused by rationally complex process, in-furnace temperature be difficult to control and easily slagging, be not suitable for the heat of large-scale production and gasification gas
It is worth the defects of low, tar content is high, and a kind of novel biomass gasifying furnace and biomass gasification method is provided.The biogas
Change stove, simple in structure, throat region uniformity of temperature profile, will not slagging, it is suitable for mass production.Using the biomass gasifying furnace
Gasification of biomass is carried out, calorific value height, the tar content of gained gasification gas are low.
The present invention solves above-mentioned technical problem by the following technical programs：
The present invention provides a kind of biomass gasifying furnace, and the biomass gasifying furnace has furnace body, and the furnace body has to institute
The aditus laryngis portion that the axis of furnace body is shunk is stated, the aditus laryngis portion has aditus laryngis section and lower divergent segment；
The top of the aditus laryngis section is equipped with feed(raw material)inlet, for pyrolysis gas and pyrolytic carbon to be passed through the aditus laryngis section；It is described
Aditus laryngis section is equipped with the first orifice layer and the second orifice layer, and first orifice layer and second orifice layer are along the aditus laryngis section
Axial arranging；First orifice layer is located at the top of second orifice layer；
Multiple first jet pipes are evenly equipped in first orifice layer, first jet pipe is through the first spout and the aditus laryngis section
Connection, first jet pipe are used to oxygen rich gas being passed through the aditus laryngis section；The axis of first jet pipe is in same level
In face, the axis of first jet pipe is vertical with the axis of the furnace body；
Multiple second jet pipes are evenly equipped in second orifice layer, second jet pipe is through the second spout and the aditus laryngis section
Connection, second jet pipe are used to oxygen rich gas being passed through the aditus laryngis section；The axis of second jet pipe is in same level
In face；The stove of the axis of second jet pipe and the intersection point of the inner wall of the axis and furnace body by second jet pipe
The angle that the section of the inner wall of body is formed is 45-75 °；
The distance between the axis of first jet pipe and the axis of second jet pipe are the internal diameter of the aditus laryngis section
0.5-1 times.
In above-mentioned biomass gasifying furnace, the jet pipe in the first orifice layer is set in opposed type, the jet pipe in the second orifice layer
It is set in angle formula, by this field conventional arrangement throttling set to ensure that the incidence rate of oxygen rich gas is uniform in each spout,
The setting of two layers of jet pipe so that the burning of aditus laryngis portion is abundant, and the setting of the second orifice layer is conducive to form eddy flow in aditus laryngis portion, extend
Tar of the oxygen rich gas in the residence time in aditus laryngis portion, effectively removing aditus laryngis portion center portion, so that the coke in gasification gas
It is oily further to reduce.
In the present invention, preferably, the internal diameter of the aditus laryngis section is 1/4~1/2 times of the internal diameter of the furnace body, it may be, for example,
5/12 times.More preferably, 2-4 times of internal diameter for the aditus laryngis section of the length of the aditus laryngis section, may be, for example, 3.2 times.
In the present invention, preferably, the aditus laryngis portion also has upper converging transition, the upper converging transition is located at the aditus laryngis section
Top, the feed(raw material)inlet are set on the top of the upper converging transition；And the side wall of the upper converging transition and the angle of horizontal plane are
45-90 °, and be not 90 °, it may be, for example, 48.8 °.More preferably, the upper converging transition is divided into first by the plane where its axis
Side and the second side, the side wall and the angle of horizontal plane of the upper converging transition of first side on the described of the second side gradually
The side wall of contracting section and the angle of horizontal plane are unequal.The technical solution is it is possible to prevente effectively from the bridging phenomenon of material.
In the present invention, preferably, the side wall of the lower divergent segment and the angle of horizontal plane are 45-75 °, it may be, for example,
59.7°。
In the present invention, preferably, the larynx of the axis of first jet pipe extremely with the axis perpendicular of the aditus laryngis section
The distance of the median plane of mouth section is equal to the aditus laryngis of the axis of second jet pipe extremely with the axis perpendicular of the aditus laryngis section
The distance of the median plane of section.
In the present invention, the quantity of first spout can be 3-6, may be, for example, 4.
In the present invention, the quantity of second spout can be 3-6, may be, for example, 4.
In the present invention, preferably, the distance between the axis of first jet pipe and the axis of second jet pipe are institute
State the internal diameter of aditus laryngis section 0.8 times.
In the present invention, preferably, the quantity of first spout is equal with the quantity of second spout.More preferably, institute
It is not be overlapped along the projection of the axis direction of the furnace body with second spout to state the first spout, and the projection is uniformly distributed in
On the circumference of the aditus laryngis section.
In the present invention, preferably, the feed(raw material)inlet is connected with pyrolysis section, biomass is in heat obtained by pyrolysis section pyrolysis
It vents one's spleen and pyrolytic carbon enters the aditus laryngis portion through the feed(raw material)inlet.
In the present invention, preferably, the furnace body in positioned at the aditus laryngis portion lower section be equipped with fire grate, the fire grate with it is described
The space formed between the furnace bottom of biomass gasifying furnace is ash cellar, and the side wall of the ash cellar is equipped with the outlet of gasification gas.
The present invention also provides a kind of biomass gasification method, the biomass gasification method is gasified using aforementioned biological matter
Stove, the biomass gasification method include the following steps：
(1) pyrolysis gas obtained by biomass pyrolytic and pyrolytic carbon enter the aditus laryngis section through the feed(raw material)inlet；
(2) pyrolytic carbon is piled up on the fire grate of the biomass gasifying furnace and forms layer of charcoal；The pyrolysis gas with through institute
The oxygen rich gas that the first spout and second spout enter is stated, after aditus laryngis section burning, obtains gaseous mixture；The gaseous mixture
In layer of charcoal above into the fire grate；
(3) with the layer of charcoal above the fire grate further gasification reaction occurs for the gaseous mixture, and must gasify gas and biology
Matter ash.
Above-mentioned biomass gasification method is as follows, and pyrolysis gas and pyrolytic carbon enter through the feed(raw material)inlet obtained by biomass pyrolytic
After the aditus laryngis section；The pyrolytic carbon, which is piled up on the fire grate of the biomass gasifying furnace, forms layer of charcoal, the pyrolysis gas and warp
The oxygen rich gas that first spout and second spout enter after aditus laryngis section burning, obtains gaseous mixture；The mixing
Gas enters in the layer of charcoal above the fire grate；With the layer of charcoal above the fire grate further gasified reverse occurs for the gaseous mixture
Should, must gasify gas and biomass ash.Gained gasification gas and biomass ash are routinely discharged by this field by the way of, generally such as
Under：Gained gasification gas is discharged into lower section furnace body, and the outlet of the gasification gas through the sidewall of the furnace body through the exhaust through hole on the fire grate
Discharge；The biomass ash falls into the ash cellar of lower section, is discharged through double knife valve.
In the present invention, the pyrolysis gas can be the pyrolysis gas of gained after biomass pyrolytic commonly used in the art, described
The tar content of pyrolysis gas may be, for example, 43wt% generally in 40wt%-50wt%, and the other components in the pyrolysis gas can be because
Biomass is specific kind of different and difference.The biomass gasification method of the present invention is used for life commonly used in the art
The pyrolysis gas of gained after material pyrolysis, can obtain the gasification gas that calorific value is high, tar content is low.
In the present invention, tar, CO, CO are typically contained in the pyrolysis gas2、CH4、H2And the matter of vapor, wherein each component
Measuring flow can be as follows：Tar (counts) mass flow as 12.096kg/h using phenol, CO, CO2、CH4And H2Mass flow be respectively
5.799kg/h, 5.209kg/h, 0.9463kg/h, 0.1460kg/h, steam quality flow are 3.872kg/h.
In the present invention, the inlet temperature of the pyrolysis gas can be the temperature of gained pyrolysis gas after the conventional pyrolysis of this field, one
As for 400-600 DEG C, may be, for example, 500 DEG C.
In the present invention, the oxygen content in the oxygen rich gas is preferably 30wt%-40wt%.
In the present invention, the inlet temperature of the oxygen rich gas can be 20-200 DEG C, may be, for example, 80 DEG C.
In the present invention, preferably, the mass flow for the oxygen being passed through in the oxygen rich gas of the aditus laryngis section and the biology
The ratio of the mass flow of oxygen needed for matter completely burned is 0.18-0.3.
Without prejudice to the field on the basis of common sense, above-mentioned each optimum condition can be combined arbitrarily each preferably to get the present invention
Example.
The reagents and materials used in the present invention are commercially available.
The positive effect of the present invention is：The present invention provides a kind of biomass gasifying furnace and biomass gasification method.
The aditus laryngis portion by being equipped with opposed type spout and angle formula spout, enables to the cross-section temperature of aditus laryngis section to be evenly distributed, and
High temperature can be kept, so that tar can be aoxidized, is pyrolyzed, therefore tar removal efficiency is further enhanced in stove.
Description of the drawings
Fig. 1 is the structure diagram of the biomass gasifying furnace of embodiment 1.
Fig. 2 is the structure diagram in the aditus laryngis portion of the biomass gasifying furnace of embodiment 1.
Fig. 3 is the Temperature Distribution cloud atlas of cross section at 600mm below the aditus laryngis section of embodiment 1.
Fig. 4 is the plane between 600mm where the axis in the aditus laryngis portion below aditus laryngis section to the aditus laryngis section of embodiment 1
Temperature Distribution cloud atlas.
Reference sign：
Upper converging transition 1
Aditus laryngis section 2
Lower divergent segment 3
First orifice layer 4
Second orifice layer 5
Outlet 6
Hopper 7
Pyrolysis section 8
Feed(raw material)inlet 9
Fire grate 10
The gas that gasifies exports 11
Ash cellar 12
Specific embodiment
It is further illustrated the present invention below by the mode of embodiment, but the embodiment therefore not limited the present invention to
Among range.Test method without specific conditions in the following example is said according to conventional methods and conditions or according to commodity
Bright book selection.
Embodiment 1
First, biomass gasifying furnace
By biomass gasifying furnace as shown in Figure 1, biomass gasifying furnace has furnace body, and furnace body, which has to the axis of furnace body, to be received
The aditus laryngis portion of contracting, the concrete structure parameter in aditus laryngis portion is as shown in Fig. 2, the internal diameter of the furnace body in addition to aditus laryngis portion is 600mm, aditus laryngis
Portion has upper converging transition 1, aditus laryngis section 2 and lower divergent segment 3；The top of upper converging transition 1 is equipped with feed(raw material)inlet 9, the side of upper converging transition 1
The angle α of wall and horizontal plane is 48.8 °；The internal diameter 250mm of aditus laryngis section 2, as the 5/12 of the internal diameter of furnace body times, aditus laryngis section 2
Length is 800mm, as the 3.2 of the internal diameter of aditus laryngis section 2 times；Aditus laryngis section 2 be equipped with the first orifice layer 4 and the second orifice layer 5, first
Axial arranging of 4 and second orifice layer 5 of orifice layer along aditus laryngis section 2, and the first orifice layer 4 is located at the top of the second orifice layer 5；Under
The side wall of divergent segment 3 and the angle β of horizontal plane are about 60 °, and occurrence is 59.7 °；4 first are evenly equipped in first orifice layer 4
Jet pipe, for oxygen rich gas to be passed through aditus laryngis section 2；First jet pipe is connected through the first spout with aditus laryngis section 2, the axis of the first jet pipe
It is in same level, the axis of the first jet pipe is vertical with the axis of furnace body；4 second are evenly equipped in second orifice layer 5
Jet pipe, for oxygen rich gas to be passed through aditus laryngis section 2；Second jet pipe is connected through the second spout with aditus laryngis section 2, the axis of the second jet pipe
It is in same level, the furnace body of the axis of the second jet pipe and the intersection point of the inner wall of the axis and furnace body by the second jet pipe
The angle that is formed of section of inner wall be 75 °；First spout is not be overlapped along the projection of the axis direction of furnace body with the second spout,
And projection is uniformly distributed on the circumference of aditus laryngis section 2；The distance between first nozzle axis and the second nozzle axis are 200mm,
As 0.8 times of the internal diameter of aditus laryngis section 2；Center of the axis of first jet pipe extremely with the aditus laryngis section 2 of the axis perpendicular of aditus laryngis section 2
The distance in face is 100mm, the axis of the second jet pipe to the distance with the median plane of the aditus laryngis section 2 of the axis perpendicular of aditus laryngis section 2
Also it is 100mm.
Wherein, feed(raw material)inlet 9 is connected with pyrolysis section 8, and biomass is in pyrolysis gas and pyrolytic carbon obtained by the pyrolysis of pyrolysis section 8 through original
Expect that entrance 9 enters aditus laryngis portion；
Wherein, fire grate 10 is equipped with positioned at the lower section in aditus laryngis portion in furnace body, between fire grate 10 and the furnace bottom of biomass gasifying furnace
The space of formation is ash cellar 12, and the side wall of ash cellar 12 is equipped with gasification gas outlet 11.
2nd, biomass gasification method
Biomass gasification method uses above-mentioned biomass gasifying furnace, and biomass gasification method includes the following steps：
(1) biomass enters pyrolysis section 8 from hopper 7, and pyrolysis gas and pyrolytic carbon are obtained after the pyrolysis of pyrolysis section 8；
(2) pyrolysis gas and pyrolytic carbon enter aditus laryngis section 2 through feed(raw material)inlet 9；
(3) pyrolytic carbon is piled up on the fire grate 10 of biomass gasifying furnace and forms layer of charcoal；Pyrolysis gas with through the first spout and the
The oxygen rich gas that two spouts enter after the burning of aditus laryngis section 2, obtains gaseous mixture；Gaseous mixture enters in the layer of charcoal of 10 top of fire grate；
(4) further gasification reaction occurs for gaseous mixture and the layer of charcoal of 10 top of fire grate, and must gasify gas and biomass ash；
(5) gasification gas is discharged into lower section furnace body through the exhaust through hole on fire grate 10, and through 11 discharge of gas outlet of gasifying；Biomass
Ash falls into the ash cellar 12 of lower section, is discharged through double knife valve；
Wherein：The temperature of pyrolysis gas is 500 DEG C, and the inlet temperature of oxygen rich gas is 80 DEG C；In pyrolysis gas containing tar,
CO、CO2、CH4、H2And vapor, and tar (counts) mass flow as 12.096kg/h using phenol, CO, CO2、CH4And H2Quality
Flow is respectively 5.799kg/h, 5.209kg/h, 0.9463kg/h, 0.1460kg/h, and steam quality flow is 3.872kg/
h.It is passed through the mass flow of the oxygen in the oxygen rich gas of aditus laryngis section 2 and the mass flow of the oxygen needed for biomass completely burned
Ratio be 0.18.
Effect data：
1st, the temperature of aditus laryngis section 2 is in more than 1300K；From figure 3, it can be seen that cross section at 2 lower section 600mm of aditus laryngis section
Temperature is uniform, mean temperature 1439K, preferably can provide heat for layer of charcoal gasification；From fig. 4, it can be seen that aditus laryngis portion
Temperature Distribution is evenly.
It follows that the double-deck spout of the present invention enables to aditus laryngis portion gas mixing more uniform, so that temperature
More uniformly, so being conducive to the removing of tar.
The flow velocity of outlet 6 (outlet 6 refers to cross section at 2 lower section 600mm of aditus laryngis section) is 0.0823m3/s；
The volume of entire high-temperature area (from the top surface of aditus laryngis section 2 to outlet 6) is about 0.0885m3, pyrolysis gas and oxygen rich air
The gaseous mixture of body is about 1.08s in the residence time of above-mentioned high-temperature area.
2nd, on outlet 6, benzene, toluene, phenol content difference 4.59 × 10-5Kg/s, 1.28 × 10-7Kg/s, 4.91
×10-6Kg/s namely outlet tar total amount are 5.0 × 10-5Kg/s, and pyrolysis gas import tar content is 3.36 × 10-3kg/
S, so the tar removal efficiency of aditus laryngis section 2 is up to 98.5%.
Since in many documents, benzene is not belonging to the scope of tar, if being calculated with this, on outlet 6, toluene, phenol
Content difference 1.28 × 10-7Kg/s, 4.91 × 10-6Kg/s namely outlet tar total amount are 5.04 × 10-6Kg/s, and pyrolysis gas
Import tar content is 3.36 × 10-3Kg/s, so the tar removal efficiency of aditus laryngis section 2 is up to 99.9%.Tar removal efficiency is
99.9%.
3rd, the outlet temperature of gasification gas is 750 DEG C, and calorific value is about 12MJ/Nm3Left and right, far above 5MJ/ of the prior art
Nm3。
Claims (10)
1. a kind of biomass gasifying furnace, the biomass gasifying furnace has furnace body, and the furnace body has the axis to the furnace body
The aditus laryngis portion of contraction, the aditus laryngis portion have aditus laryngis section and lower divergent segment, and the top of the aditus laryngis section is equipped with feed(raw material)inlet, is used for
Pyrolysis gas and pyrolytic carbon are passed through the aditus laryngis section, which is characterized in that the aditus laryngis section is equipped with the first orifice layer and the second jet pipe
Layer, the axial arranging of first orifice layer and second orifice layer along the aditus laryngis section；First orifice layer is located at institute
State the top of the second orifice layer；
Multiple first jet pipes are evenly equipped in first orifice layer, first jet pipe is through the first spout and the aditus laryngis Duan Lian
Logical, first jet pipe is used to oxygen rich gas being passed through the aditus laryngis section；The axis of first jet pipe is in same level
Interior, the axis of first jet pipe is vertical with the axis of the furnace body；
Multiple second jet pipes are evenly equipped in second orifice layer, second jet pipe is through the second spout and the aditus laryngis Duan Lian
Logical, second jet pipe is used to oxygen rich gas being passed through the aditus laryngis section；The axis of second jet pipe is in same level
It is interior；The furnace body of the axis of second jet pipe and the intersection point of the inner wall of the axis and furnace body by second jet pipe
The angle that is formed of section of inner wall be 45-75 °；
The 0.5-1 of the distance between the axis of first jet pipe and the axis of second jet pipe for the internal diameter of the aditus laryngis section
Times.
2. biomass gasifying furnace as described in claim 1, which is characterized in that the internal diameter of the aditus laryngis section is interior for the furnace body
1/4~1/2 times of diameter；
And/or 2-4 times of the internal diameter that the length of the aditus laryngis section is the aditus laryngis section.
3. biomass gasifying furnace as described in claim 1, which is characterized in that the aditus laryngis portion also has upper converging transition, described
Upper converging transition is located at the top of the aditus laryngis section, and the feed(raw material)inlet is set on the top of the upper converging transition；It is and described tapered
The side wall of section and the angle of horizontal plane are 45-90 °, and are not 90 °；Preferably, the upper converging transition is by flat where its axis
Face is divided into the first side and the second side, the side wall of the upper converging transition of first side and the angle of horizontal plane and the second side
The upper converging transition side wall and horizontal plane angle it is unequal；
And/or the side wall of the lower divergent segment and the angle of horizontal plane are 45-75 °.
4. biomass gasifying furnace as described in claim 1, which is characterized in that the axis of first jet pipe to the aditus laryngis
Section axis perpendicular the aditus laryngis section median plane distance be equal to second jet pipe axis to the aditus laryngis section
Axis perpendicular the aditus laryngis section median plane distance.
5. biomass gasifying furnace as described in claim 1, which is characterized in that the quantity of first spout is 3-6；With/
Or, the quantity of second spout is 3-6.
6. biomass gasifying furnace as described in claim 1, which is characterized in that the axis of first jet pipe and the described second spray
The distance between axis of pipe is 0.8 times of the internal diameter of the aditus laryngis section.
7. biomass gasifying furnace as described in claim 1, which is characterized in that the quantity of first spout and the described second spray
The quantity of mouth is equal；Preferably, first spout is not weighed with second spout along the projection of the axis direction of the furnace body
It is folded, and the projection is uniformly distributed on the circumference of the aditus laryngis section.
8. biomass gasifying furnace as described in claim 1, which is characterized in that the feed(raw material)inlet is connected with pyrolysis section, biology
Matter enters the aditus laryngis portion in pyrolysis gas and pyrolytic carbon obtained by pyrolysis section pyrolysis through the feed(raw material)inlet；
And/or fire grate, the fire grate and the biomass gasifying furnace are equipped with positioned at the lower section in the aditus laryngis portion in the furnace body
The space formed between furnace bottom is ash cellar, and the side wall of the ash cellar is equipped with the outlet of gasification gas.
9. a kind of biomass gasification method, which is characterized in that the biomass gasification method is used such as any one of claim 1-8
The biomass gasifying furnace, the biomass gasification method include the following steps：
(1) pyrolysis gas obtained by biomass pyrolytic and pyrolytic carbon enter the aditus laryngis section through the feed(raw material)inlet；
(2) pyrolytic carbon is piled up on the fire grate of the biomass gasifying furnace and forms layer of charcoal；The pyrolysis gas with through described the
The oxygen rich gas that one spout and second spout enter after aditus laryngis section burning, obtains gaseous mixture；The gaseous mixture enters
In layer of charcoal above the fire grate；
(3) with the layer of charcoal above the fire grate further gasification reaction occurs for the gaseous mixture, and must gasify gas and biomass ash.
10. biomass gasification method as claimed in claim 9, which is characterized in that the tar content of the pyrolysis gas is
40wt%-50wt%；
And/or the inlet temperature of the pyrolysis gas is 400-600 DEG C；
And/or the oxygen content in the oxygen rich gas is 30wt%-40wt%；
And/or the inlet temperature of the oxygen rich gas is 20-200 DEG C；
And/or it is passed through needed for the mass flow of oxygen in the oxygen rich gas of the aditus laryngis section and the biomass completely burned
Oxygen mass flow ratio be 0.18-0.3.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319458A (en) * | 2019-06-13 | 2019-10-11 | 华北理工大学 | A kind of two-stage type biomass furnace |
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| CN102433162A (en) * | 2011-05-06 | 2012-05-02 | 华东理工大学 | Entrained-flow bed gasifier with staged oxygen feeding and gasification method thereof |
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- 2018-01-12 CN CN201810032276.6A patent/CN108179030A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433162A (en) * | 2011-05-06 | 2012-05-02 | 华东理工大学 | Entrained-flow bed gasifier with staged oxygen feeding and gasification method thereof |
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| 杜云川: "《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》", 15 December 2011 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319458A (en) * | 2019-06-13 | 2019-10-11 | 华北理工大学 | A kind of two-stage type biomass furnace |
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