The biomass gasifying furnace devoked using furnace sandwich structure
【Technical field】
The present invention relates to biomass gasifying furnace, more particularly to a kind of gasification of biomass of utilization furnace sandwich structure decoking
Stove.
【Background technology】
Gasification of biomass is the mistake that biomass are produced fuel gas by destructive distillation, thermal chemical reaction under anoxic conditions
Journey.Common biomass gasification process includes drying, is pyrolyzed process or the reactions such as (being also called cracking), oxidation, reduction.Biomass
What gasification was typically carried out in biomass gasifying furnace, therefore, gasification of biomass structure in the stove can be divided into by gasification reaction process
Drying layer (also known as dry section), pyrolytic layer (area), oxide layer (area), reducing zone (area).After biomass material enters gasification furnace,
Drying layer is heated and makes the moisture evaporation in raw material, forms dry raw material and water vapour.Biomass dry raw material is moved downwardly into
Pyrolytic layer, volatile matter is separated out in large quantities from biomass, and is left remaining charcoal.The volatile matter separated out in pyrolytic layer is main
Including vapor, hydrogen, carbon monoxide, carbon dioxide, methane, tar etc..The residue charcoal of pyrolysis oxide layer with drawn
The gasifying medium for entering reacts and produces gasification gas, and discharges substantial amounts of heat simultaneously, with entering of supporting other each layers to react
OK.The temperature typical temperature of oxide layer up to 1000~1300 degrees Celsius, after the layer participates in burning further degrade by volatile matter.
There is no oxygen to exist in reducing zone, the wood in the combustion product (such as carbon dioxide) and vapor and reducing zone that are generated in oxide layer
There is reduction reaction, generation hydrogen and carbon monoxide etc. in charcoal.These gases and volatile matter are just formd and are available for production of living
Fuel gas, completes the process that solid biomass is converted to gaseous fuel.The temperature of reducing zone is generally higher, and about 900 is Celsius
Degree.Wherein, gasification reaction is mainly carried out in oxide layer and reducing zone, therefore oxide layer and reducing zone general name gasification zone, and is pyrolyzed
Layer and drying layer are collectively referred to as fuel area in preparation.
Existing frequently-used biomass gasifying furnace is divided to by structure type can be divided into fixed bed and the major class of fluid bed two.Fixed bed
Gasification furnace structure form is mainly including uniflow gas stove, down-draft type gasifying furnace, horizontal type gasification furnace, happy formula gasification furnace etc..
Wherein, horizontal type and happy formula gasification furnace due to its inherent shortcoming it is less in commercial kitchen area application.And updraft type and downdraft gas
It is two more conventional major class gasification furnaces to change stove.
As shown in figure 1, the material of uniflow gas stove puts into from furnace roof, gasifying medium is joined from bottom of furnace body into oxide layer
With gasification reaction, react the gas for producing and flow from bottom to top, exported by the fuel gas on top and discharged, its exhaust and convenient, no
Powerful air-extractor is needed to be evacuated.And because drying layer has certain filtration, this mode to fuel gas
Content of ashes is few in the fuel gas come out of the stove.But because material puts into from top to bottom, fuel gas is discharged from bottom to top, and gas
Change stove strict to furnace sealing requirement, therefore its filling is more inconvenient, the Structural Design Requirement to dog-house is more strict.Together
When, due to further pyrolysis of the tar without gasification zone that pyrolytic layer is produced, cause tar content mistake in the fuel gas of output
It is high.
As shown in Fig. 2 the material of down-draft type gasifying furnace puts into from furnace roof, react the gas for producing and flow from top to bottom, by
The gas outlet discharge of lower portion of furnace body.It is divided into drying layer, pyrolytic layer, oxide layer, reducing zone from top to bottom in stove.Due to the side of feeding intake
To consistent with gas discharge direction, therefore the filling that can uncap at any time, and the tar that pyrolytic layer is produced can enter one by gasification zone
Step pyrolysis, therefore the tar content in output fuel gas can be substantially reduced.But due to the natural direction of hot-fluid be from bottom to top,
And the direction that gas is come out of the stove is from top to bottom, therefore to extract fuel gas out and need to expend larger power, and come out of the stove it is flammable
Gas contains more ash content.Further, since gasification zone temperature is higher, thus its fuel gas temperature for coming out of the stove it is higher, it is necessary to
It is cooled down with water, and also higher to the heat resistant requirements of air-extractor, therefore, though its fuel gas tar for coming out of the stove
Content is relatively low, but takes gas and there is certain difficulty.
Sum it up, existing updraft type and down-draft type gasifying furnace respectively there are advantage and disadvantage, further improvement is still needed to, especially gone up
The tar content that sucking type gasifier is come out of the stove is high, not only causes the loss of tar contained energy, and directly discharge can cause serious
Environment pollution.
【The content of the invention】
Present invention seek to address that above mentioned problem, and a kind of biomass gasifying furnace of utilization furnace sandwich structure decoking is provided.
To solve the above problems, the invention provides a kind of biomass gasifying furnace of utilization furnace sandwich structure decoking, its
Body of heater including being provided with reative cell, the reative cell is divided into drying layer, pyrolytic layer, reducing zone and oxide layer, on the body of heater
It is provided with sealing and dog-house, gasifying medium entrance and the gas outlet for being fed intake can be opened, fire grate is provided with body of heater, it is special
Levy and be, the body of heater is constructed having the sandwich of gasification tunnel, the gasification tunnel is included for fuel gas in stove
The blast tube of effusion, one end of the blast tube and reducing zone insertion, the other end then with the gas outlet insertion, the combustion
Gas passage causes that the fuel gas of generation in body of heater is forced to flow through reducing zone, makes the tar being mingled with fuel gas through reducing zone
High temperature and be pyrolyzed.
When feeding intake in body of heater, the blast tube is spaced under the natural packing of material and is formed with furnace interior
The gap for being available for fuel gas to escape.
The body of heater includes internal the first body of heater and the second body of heater being mutually communicated, and second body of heater is sheathed on the first stove
The middle part or middle and lower part of body, form the sandwich with blast tube between first body of heater and the second sidewall of the furnace body.
The drying layer and pyrolytic layer are sequentially arranged in the first body of heater, and described feeding intake is provided with the top of first body of heater
Mouthful, the reducing zone and oxide layer are sequentially arranged in second body of heater, are respectively equipped with the side wall of second body of heater described
Gas outlet and gasification medium inlet.
The gasification tunnel includes being available for gasifying medium to feed to the gasifying medium passage of oxide layer, and the body of heater includes interior
The first body of heater, the second body of heater and the 3rd body of heater that portion is mutually communicated, second body of heater be sheathed on the middle part of the first body of heater or in
Bottom, the 3rd body of heater is sheathed on the middle part or middle and lower part of the second body of heater, between first body of heater and the second sidewall of the furnace body
The gasifying medium passage is formed, the blast tube is formed between second body of heater and the 3rd sidewall of the furnace body.
The drying layer and pyrolytic layer are sequentially arranged in the first body of heater, and described feeding intake is provided with the top of first body of heater
Mouthful, the oxide layer is provided with the gasifying medium entrance, institute in the second body of heater in the middle and upper part or top of second body of heater
Reducing zone is stated in the 3rd body of heater, the gas outlet is provided with the side wall of the 3rd body of heater.
The body of heater includes internal the first body of heater and the second body of heater being mutually communicated, and divides from top to bottom in first body of heater
It is drying layer, pyrolytic layer, reducing zone and oxide layer, second body of heater in the first body of heater, open by the lower end of second body of heater
Mouthful, it is located in the reducing zone, and the top of second body of heater is connected through connecting pipe with gas outlet insertion, described first
The dog-house is provided with the top of body of heater.
The first dividing plate is provided with the body of heater, first dividing plate is spaced with sidewall of the furnace body and encloses a lower end and open
Mouthful cavity, the lower ending opening of the cavity is located in the reducing zone, and the cavity forms the blast tube, with described first
The relative sidewall of the furnace body of dividing plate is provided with the gas outlet.
The gasification tunnel includes being available for gasifying medium to feed to the gasifying medium passage of oxide layer, is set in the body of heater
Have a second partition, the second partition is spaced with sidewall of the furnace body and encloses the gasifying medium passage, with described second every
The relative sidewall of the furnace body of plate is provided with the gasifying medium entrance.
Middle and lower part of the fire grate in body of heater, is provided with mucking machine, in the body of heater in the bottom of the fire grate
Bottom submerges the water of the mucking machine equipped with height, and the water in body of heater is by the intercommunicating pore on sidewall of the furnace body and is located at body of heater
Outer pond insertion.
Favorable attributes of the invention are that it efficiently solves above mentioned problem.The present invention by by structure of furnace body into having
The sandwich of gasification tunnel, and make the opening of blast tube and reducing zone insertion, so as to furnace gas can be forced to be forced to flow through
Reducing zone and discharge, so as to the tar produced by pyrolytic layer can be made through the further pyrolysis of gasification zone, substantially reduce come out of the stove can
The tar content of combustion gas body.Compared to existing technology, the present invention has advantages below to the present invention:
1st, tar can not only substantially reduce the tar content in the fuel gas come out of the stove through the high temperature pyrolysis of reducing zone, and
And effectively using the energy contained by tar, and the pollution that tar is caused to bad border can be reduced.
2nd, the fuel gas in stove of the present invention is forced to flow through reducing zone and discharged from blast tube, and blast tube and drying
Separately, because reducing zone temperature is higher, it is high that fuel gas that it is come out of the stove carries heat for layer and pyrolytic layer, and it leads to flowing through combustion gas
During road, material in the further heating furnace of the heat entrained by it can be made full use of, increase the degree of pyrolysis of tar, improve pyrolysis effect
Really, and the temperature of fuel gas of coming out of the stove is reduced.
3rd, traditional gasification furnace enters outlet using pipeline, and gasifying medium is limited to the diameter of pipeline with the circulation of fuel gas
With the symmetry of furnace interior air-flow, the too high problem of local temperature is easily caused, and cause local gas flow velocity excessive.And this
Using furnace sandwich construction blast tube and gasification medium channel, it can increase gas compared to conventional pipelines, the present invention for invention
The sectional area of body access way, so as to improve the input quantity and input speed of gasifying medium, and improves the defeated of output fuel gas
Outflow and output speed.And gas flow and the raising of flow velocity, the gas flow rate of furnace pressure and part can be not only reduced,
And be conducive to the stability of internal-response.
4th, gas outlet of the invention and blast tube insertion, therefore, gas outlet arbitrarily can be arranged on sidewall of the furnace body,
Without being necessarily placed at body of heater top as traditional uniflow gas stove, also it is not required to be necessarily placed at stove as down-draft type gasifying furnace
Body bottom.The present invention can arbitrarily set gas outlet and carry out taking gas, and it breaches traditional biomass gasification furnace and is set in gas outlet
The limitation put.
5th, material of the invention from dog-house input stove in after, solid accumulation on fire grate, using the spy of solid accumulation
Put and blast tube isolation got up, make material dispensing and fuel gas discharge be carried out in two mutually isolated spaces,
Therefore compared to traditional uniflow gas stove, filling of the present invention more facilitates.
6th, body of heater of the invention is closed, there is blast pressure when gasifying medium is passed through in stove, and furnace gas high temperature forms heat
Pressure, under blast pressure and hot pressing function, fuel gas can be discharged from blast tube naturally, and it is not required to extra exhausting and sets
Standby or only need very low power exhaust equipment, it is compared and solves and taken from reducing zone with traditional down-draft type gasifying furnace, the present invention
Difficult, high to the air-extractor requirement problem of gas.
7th, gasification furnace bottom of the invention is arranged to fluid-tight structure, and during ash discharge, it can not only play the effect of being fully sealed,
And can cool down stove charcoal, and stove charcoal, when falling into water, the vapor of evaporation can also be further used as the gasification of reaction in furnace
Medium.
Always say and it, instant invention overcomes the shortcoming of traditional updraft type and down-draft type gasifying furnace, and effectively combine two
The advantage of person, favorably solving the problems, such as uniflow gas stove to come out of the stove, fuel gas tar content is high, filling is inconvenient, and effectively
Solve the problems, such as that down-draft type gasifying furnace takes gas difficult.Biomass gasifying furnace of the invention has structure novelty, takes gas convenience, pyrolysis
The advantages of effect is good, tar content is low, capacity usage ratio is high, preferably widelys popularize.
【Brief description of the drawings】
Fig. 1 is the theory structure schematic diagram of uniflow gas stove in the prior art.
Fig. 2 is the theory structure schematic diagram of down-draft type gasifying furnace in the prior art.
Fig. 3 is theory structure schematic diagram of the invention.
Fig. 4 is the structural representation of embodiment 1.
Fig. 5 is the structural representation of embodiment 2.
Fig. 6 is the structural representation of embodiment 3.
Fig. 7 is the structural representation of embodiment 4.
Fig. 8 is the structural representation of embodiment 5.
Wherein, body of heater 10, the first body of heater 101, the second body of heater 102, the 3rd body of heater 103, the first dividing plate 104, second partition
105th, dog-house 11, gasifying medium entrance 12, gas outlet 13, fire grate 14, blast tube 15, gasifying medium passage 16, connection
Pipeline 17, intercommunicating pore 18, air supply duct 19, reative cell 20, mucking machine 30, pond 40, air blower 50.
【Specific embodiment】
The following example is explained further and supplements to of the invention, and the present invention is not limited in any way.
As shown in Fig. 3~Fig. 8, the biomass gasifying furnace of utilization furnace sandwich structure decoking of the invention includes body of heater 10,
Reative cell 20 is provided with body of heater 10, dog-house 11, gasifying medium entrance 12, gas outlet 13 is provided with body of heater 10, in stove
Fire grate 14 is provided with body 10, ash exhauster is provided with the bottom of body of heater 10.The reative cell 20 by course of reaction can be divided into drying layer,
Pyrolytic layer, reducing zone and oxide layer.It should be noted that, the drying layer, may have no between pyrolytic layer, reducing zone and oxide layer
The hierarchical structure of significantly distinguishing limit, and its non-physical, it is the virtual level for defining out according to the reaction in stove
Structure, common knowledge and conventional appellation that it belongs to the sector.The dog-house 11 is used to add biomass material, and it can be opened
Feed intake and can close, and good sealing effectiveness can be played during its closing.The dog-house 11 can be using known structure.It is described
Gasifying medium entrance 12 is used for gasifying medium is passed through in stove, makes gasifying medium participate in reacting in oxide layer.In following examples
In the case of not specified, gasifying medium entrance 12 is usually provided in the lower section of fire grate 14, and it passes through the connection air blast of air supply duct 19
Machine 50, air supply duct 19 can be stretched in stove, and it is exported just to oxide layer, so as to gasifying medium can be fed directly into oxidation
Layer.The gasifying medium needs and adds according to reaction, and it can be each known gasifying medium, such as air.The ash exhauster
Known features are referred to, in the present invention, to strengthen the sealing of body of heater 10, the ash exhauster is fluid-tight structure:The bottom of body of heater 10
Portion is fixed on ground, and the bottom of body of heater 10 is provided with mucking machine 30, and the inner bottom part tank of body of heater 10 has a certain amount of water, the height submergence of water
The mucking machine 30.Hole 18 is communicated with the bottom sidewall of body of heater 10, makes the water in body of heater 10 and the pond outside body of heater 10
40 water connection.When by 30 deslagging of mucking machine, the water in stove remains to play good sealing function, so that when strengthening deslagging
Sealing.Additionally, the stove charcoal of high temperature can not only play cooling effect in falling into water, and the vapor for producing can also be used
Make gasifying medium, for reaction in furnace.
Broad outlines of the invention are that body of heater 10 is configured with the sandwich of gasification tunnel, make output flammable
One end of the blast tube 15 of gas and reducing zone insertion, the other end then with the insertion of the gas outlet 13 so that gas in stove
Body is forced through reducing zone and tar is pyrolyzed at high temperature, to reduce the tar content in the fuel gas come out of the stove.Based on this
Principle, can be set out various structures of specific body of heater 10, describe its concrete structure in detail with specific embodiment below:
Embodiment 1
As shown in figure 4, the body of heater 10 includes the first body of heater 101 and the second body of heater 102.The lower end of first body of heater 101
The radius size or cross sectional dimensions of opening, the upper end open of the second body of heater 102, and the second body of heater 102 are more than the chi of the first body of heater 101
It is very little.Second body of heater 102 is set in the middle part or middle and lower part of the first body of heater 101, is mutually communicated inside it, between the wall of side separately,
So as to just form the sandwich with blast tube 15.First body of heater 101 and the second body of heater 102 can be integrally formed,
Can also be that discrete part is tightly connected integrally by known method.The throwing is provided with the top of the first body of heater 101
Material mouth 11.In the second body of heater 102, it can be known Automatic grate 14 to the fire grate 14.The drying layer, pyrolytic layer are certainly
It is above lower in the first body of heater 101.The reducing zone and oxide layer are located in the second body of heater 102 from top to bottom, and positioned at institute
State the top of fire grate 14.On the side wall of second body of heater 102, it is highly higher than level where reducing zone for the gas outlet 13
Highly.In the present embodiment, it is located in the upper portion side wall of the second body of heater 102, and in other embodiment, it can be located at the second body of heater
102 top.
When biomass material puts into from dog-house 11, solid accumulation is on fire grate 14 and by the blast tube 15 and
The gap for being available for combustible gas to overflow is isolated and formed inside one body of heater 101, makes the blast tube 15 can be used to take gas.Need
It is bright, it is described isolate be not necessarily referring to the isolation of being fully sealed property, for it is relatively direct insertion.The integral sealing of the body of heater 10
Well, because air blower 50 is to during feeding gasifying medium, it has certain blast, and in-furnace temperature is higher, reaction in body of heater 10
The gas temperature of generation is high and form certain hot pressing, under blast and hot pressing function, the two ends of blast tube 15 form pressure difference,
So that furnace gas flows to unique outlet naturally --- blast tube 15 so that furnace gas is forced to flow through reduction
Layer and discharged from blast tube 15, reduce air-extractor use in high temperature environments, reduction takes gas difficulty.Due to reducing zone temperature
Degree is high, and the tar (typically being produced by pyrolytic layer) that furnace gas is mingled with will be pyrolyzed in reducing zone, changes into have and uses valency
The fuel gas of value, so as to both play the energy value of tar, can reduce the tar content in fuel gas of coming out of the stove again.Additionally,
Fuel gas from blast tube 15 discharge when, heat entrained by it is also radiation-curable to drying layer and pyrolytic layer, further improves
Pyrolysis effect.
Embodiment 2
As shown in figure 5, the body of heater 10 of the present embodiment include internal the first body of heater 101 being mutually communicated, the second body of heater 102,
3rd body of heater 103.The lower ending opening of first body of heater 101, the upper and lower ends of the second body of heater 102 are open, and it is sheathed on the first body of heater
101 middle part or middle and lower part.The upper end open of the 3rd body of heater 103, its middle part or middle and lower part for being sheathed on the second body of heater 102.The
One body of heater 101, the second body of heater 102, the 3rd body of heater 103 are arranged and form the sandwich with gasification tunnel successively, wherein, the
Gasifying medium passage 16 is formed between the side wall of one body of heater 101 and the second body of heater 102, thus gasifying medium is passed through to oxide layer.
Blast tube 15 is formed between second body of heater 102 and the side wall of the 3rd body of heater 103, thus fuel gas discharges.First body of heater
101st, the second body of heater 102 and the 3rd body of heater 103 can be integrally formed, and can also be formed by discrete parts integrally connected.The dog-house
11 are located in the first body of heater 101 from top to bottom located at the top of the first body of heater 101, drying layer and pyrolytic layer.The gasifying medium
Outlet is provided with oxide layer located at the middle and upper part or top of the second body of heater 102 in the second body of heater 102.The gas outlet 13 sets
In on the side wall of the 3rd body of heater 103, fire grate 14 is in the 3rd body of heater 103.The top of fire grate 14 is reducing zone.The present embodiment
Specific works original reference implementation example 1.
Embodiment 3
As shown in fig. 6, the body of heater 10 of the present embodiment includes the first body of heater 101 and the second body of heater 102.First body of heater 101 is
Seal body of heater 10, is divided into drying layer, pyrolytic layer, reducing zone and oxide layer from top to bottom in it.Second body of heater 102 is upper and lower two
The body of heater 10 of end opening, it is located in the first body of heater 101, and its lower ending opening is located in reducing zone, and its upper end open is through communicating pipe
Road 17 and the insertion of gas outlet 13.The gas outlet 13 can be located on the side wall of the arbitrary height of the first body of heater 101.Fire grate 14
In the first body of heater 101, positioned at oxide layer lower section.Dog-house 11 is located at the top of the first body of heater 101, gasifying medium entrance 12
Located at the lower section of fire grate 14, its by stretch to the air supply duct 19 in body of heater 10 and to sending into gasifying medium in stove.This implementation
The specific works original reference implementation example 1 of example.
Embodiment 4
As shown in fig. 7, the body of heater 10 of the present embodiment is single body of heater 10, be divided into from top to bottom in stove drying layer, pyrolytic layer,
Reducing zone and oxide layer.The first dividing plate 104 is provided with the body of heater 10, first dividing plate 104 and the sidewall spacers of body of heater 10 and enclose
One cavity of lower ending opening of synthesis, the lower ending opening of the cavity is located in reducing zone, and forms the combustion gas of discharge fuel gas
Passage 15.Gas outlet 13 is provided with the body of heater 10 side wall relative with the first dividing plate 104.Dog-house 11 is located at the top of body of heater 10
Portion, fire grate 14 is located in body of heater 10, and positioned at oxide layer lower section.Located at oxide layer lower section, it passes through to send gasifying medium entrance 12
Wind pipeline 19 connects air blower 50 and sends into gasifying medium to oxide layer.The specific works original reference implementation example 1 of the present embodiment.
Embodiment 5
The structure of body of heater 10 of the present embodiment with embodiment 4, except that, as shown in figure 8, being additionally provided with the in the body of heater 10
Two dividing plates 105, the second partition 105 and the sidewall spacers of body of heater 10 and enclose a lower ending opening confession gasifying medium be passed through to
The gasifying medium passage 16 of the oxide layer, the gasifying medium entrance 12 is located at body of heater 10 side relative with second partition 105
On wall.The specific works original reference implementation example 1 of the present embodiment.
Thereby, the biomass gasifying furnace of utilization furnace sandwich structure decoking of the invention is just formd, using body of heater itself
Sandwich, just can effectively remove the tar in fuel gas, and be quite easy to take gas and charging.Although implementing more than
Example is disclosed to the present invention, but the scope of the present invention is not limited thereto, under conditions of without departing from present inventive concept,
Each component can be replaced with the similar or equivalent structure of art personnel understanding above.