CN106753584A - A kind of fluidized bed pyrolysis gasification installation of use biological fuel gas recirculating process - Google Patents
A kind of fluidized bed pyrolysis gasification installation of use biological fuel gas recirculating process Download PDFInfo
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- CN106753584A CN106753584A CN201611223193.2A CN201611223193A CN106753584A CN 106753584 A CN106753584 A CN 106753584A CN 201611223193 A CN201611223193 A CN 201611223193A CN 106753584 A CN106753584 A CN 106753584A
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- 238000002309 gasification Methods 0.000 title claims abstract description 65
- 238000000197 pyrolysis Methods 0.000 title claims abstract description 47
- 239000002737 fuel gas Substances 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000003134 recirculating effect Effects 0.000 title claims abstract description 16
- 230000008569 process Effects 0.000 title claims abstract description 15
- 238000009434 installation Methods 0.000 title claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 38
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 12
- 238000007599 discharging Methods 0.000 claims abstract description 11
- 238000009826 distribution Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 28
- 239000012530 fluid Substances 0.000 claims description 27
- 239000002028 Biomass Substances 0.000 claims description 22
- 239000000428 dust Substances 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 description 18
- 239000002956 ash Substances 0.000 description 16
- 239000003610 charcoal Substances 0.000 description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 15
- 239000002245 particle Substances 0.000 description 14
- 229910052799 carbon Inorganic materials 0.000 description 11
- 239000008187 granular material Substances 0.000 description 8
- 239000000567 combustion gas Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- 230000007613 environmental effect Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000005243 fluidization Methods 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000003039 volatile agent Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 206010068052 Mosaicism Diseases 0.000 description 1
- 230000001195 anabolic effect Effects 0.000 description 1
- 239000012075 bio-oil Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000004523 catalytic cracking Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000002073 mitogenetic effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010742 number 1 fuel oil Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 210000003765 sex chromosome Anatomy 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 210000000952 spleen Anatomy 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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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
-
- 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
-
- 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
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1603—Integration of gasification processes with another plant or parts within the plant with gas treatment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of fluidized bed pyrolysis gasification installation of use biological fuel gas recirculating process, wherein, including fluidized gasification furnace body, the gasifying agent supply structure, leakage-proof type feeding structure and the biological fuel gas loop structure that are provided with the bottom of fluidized gasification furnace body.Fluidized gasification furnace body includes cone heating section, pyrolysis section and cone diffuser, settling section.Gasifying agent supply structure includes isobaric bellows, air distribution plate, and the blast cap being provided with isobaric bellows；Described biological fuel gas loop structure is included in cone diffuser and is provided with the high temperature pump-line communicated with cone diffuser top and the Powder discharging fan being provided with high temperature pump-line, and the admission line communicated with cone heating section top is provided with Powder discharging fan and the playpipe for extending to cone heating intersegmental part is provided with admission line end.The present invention has the advantages that adaptability is good, energy-efficient, operate flexible and simple structure.
Description
Technical field
It is more particularly to a kind of to recycle work using biological fuel gas the invention belongs to biomass thermal chemical device technical field
The biomass pyrogenation gasification device of the fluidized-bed structure of skill.
Background technology
In recent years, China is also encountered by some stern challenges while great development highly visible is achieved, special
It is not environmental problem and energy problem, has been increasingly becoming obstruction economy and the important of social development keeps factor in check.In this regard, China's political affairs
Mansion increases the supporting dynamics in environmental protection and new energy popularization practical, successively proposes energy-conserving and environment-protective, recycling economy, cleaning
The concepts such as production, conservation-minded society, new energy, regenerative resource, in law, policy, standard, finance, industrial structure etc.
All many-sides have put into effect a series of direction of industry measure, have largely contained expanding for above mentioned problem, environment
Rapidly ascendant trend is effectively contained for contamination accident.But, because China has the unreasonable of existing energy resource structure, resource is not
The source sex chromosome mosaicism such as be utilized effectively, and fundamental reversal hinders a variety of unfavorable factors of sustainable development still to show weak.2013
In China's one-time-consumption energy resource structure, coal and crude oil occupy 66.77% and 17.02% share respectively, and regenerative resource
Only account for 1.02% ratio.Analyze this group of data can be seen that, environmental problem does not only have the unbalance source sexual factor of energy resource structure, together
When China renewable sources of energy there is also huge waste and huge growth potential.Therefore, energy and environment are solved in order to comprehensive
Problem, realize the style of economic increase to sustainable transformation, exploitation regenerative resource becomes extremely important.China has very rich
Rich biomass resource, Biomass Energy Industry is greatly developed in China, to promote sustainable development, improve environmental quality and
Alleviate energy scarcity, cultivating the aspects such as emerging strategic industries has major and immediate significance.The biomass pyrolytic of middle and small scale
Equipment for gasification, it is of a relatively high with transformation efficiency, using it is flexible the features such as, it is adaptable to agricultural and back yard industry user.With life
The close terminal user in the raw material of substance place of production builds this kind equipment, can environmental protection treatment discarded object generate economic benefit again.It is raw
Material pyrolysis gasification can be not only used for generating electricity, and can be also used for gasification of biomass CHP systems, can carry out heat supply or cooling.
Different according to the temperature that pyrolytic gasification reacts, the product for carrying out different thermal chemical reactions is also different, except can be biological with output
Outside matter artificial fuel gas, charcoal and bio-oil etc. can also be produced.Different, the method using suiting measures to local conditions according to raw material, choosing
The product of benefit most effective for locality is selected out, flexible arrangement production can produce very big economic benefit.In sum, it is biological
Matter gasification has huge market potential in China.At present, commercialization stage is had been enter into, the biomass gasifying furnace of scale operation can
To be divided into fixed-bed gasification furnace and the big type of fluidized-bed gasification furnace two, and fixed-bed gasification furnace and fluidized-bed gasification furnace have many
Plant multi-form.The B of Chinese patent mandate CN 101613625 " detarring small-sized biomass gasifier method and apparatus " and in
In a kind of A " gasification furnace with tar catalytic cracking structure " of state license CN 102250649, small-sized consolidating is employed
Fixed bed gasification furnace, fixed-bed gasification furnace has the shortcomings that some are difficult to overcome, and such as internal procedure is difficult to control, materials inside is easily taken
It is small etc. that bridge forms cavity, treating capacity.In the A of patent CN 104910937 " Multifunction sectional type biomass pyrolysis device ", by heat
Solution gasification installation has been divided into three-stage, although possess some advantages, but structure is excessively complicated, and control system is excessively cumbersome, string
Connection structure is easily caused system influences overall production because of small fault.In addition, in Chinese invention patent CN
In 103756696 B " double-fluidized-bed flammable solid pyrolysis of waste oil gas combined production device and method ", the pyrolysis oven sheet of fluid bed
Body uses conventional design.According to conventional engineering experience, when fluidized bed pyrolysis reactor is run in running on the lower load, bringing-up section
And the phenomenon for often occurring less than critical fludization velocity in pyrolysis section (fluid bed concentrated phase area), goods fluid state is not in concentrated phase area
Stabilization.At this moment biomass material easily produces hardened or coking, and then destroys the normal fluidized state of material.The present invention is because use
Biological fuel gas recirculating systems, the biological fuel gas and gasifying agent of circulation are biological by changing together as fluidizing agent
Matter combustion gas and the proportioning of gasifying agent, and then reach very strong Load Regulation ability, can be ensured when system underload compared with
Production efficiency high.
The content of the invention
In view of the above problems, it is an object of the invention to provide a kind of adaptability it is good, energy-efficient, operation flexibly and
The biomass pyrogenation gasification device of the fluidized-bed structure of the use biological fuel gas recirculating process of simple structure.
To achieve the above object, a kind of fluid bed heat of use biological fuel gas recirculating process that the present invention is provided is vented one's spleen
Makeup is put, wherein, including fluidized gasification furnace body, be provided with the bottom of fluidized gasification furnace body gasifying agent supply knot
Structure and the leakage-proof type feeding structure being provided with fluidized gasification furnace body side, and be provided with fluidized gasification furnace body
Biological fuel gas loop structure；Described fluidized gasification furnace body includes cone heating section, is provided with cone heating section
Pyrolysis section and the cone diffuser that is provided with pyrolysis section, and the settling section being provided with cone diffuser；Described gasification
Agent supply structure includes that the isobaric bellows connected with cone heating section, the inside between isobaric bellows and cone heating section are provided with
Air distribution plate, and the blast cap being provided with isobaric bellows；Described biological fuel gas loop structure is included on cone diffuser
The high temperature pump-line communicated with cone diffuser top and the Powder discharging fan being provided with high temperature pump-line are provided with, and in row
Powder blower fan is provided with the cone heating section admission line that communicates of top and is provided with admission line end and extends to cone and add
Playpipe inside hot arc.Thus, the cylinder and bullet of fluidized gasification furnace body different cross section be combined into, by it is lower extremely
The characteristic sizes such as the vertical structure of upper flaring, the sectional area and height of difference segmentation can be adjusted according to actual requirement
It is whole.Wherein the flaring angle of bringing-up section is 10 °, and the flaring angle of diffuser is also 10 °.Density, grain in view of charcoal ash particle
The factors such as footpath, specific surface area, into bringing-up section flow velocity be the flow velocity of 1.5 to 2.5m/s, pyrolysis section for 2m/s, diffuser outlet
Flow velocity to settling section is no more than 0.3m/s.There is high temperature pump-line on diffuser top, carry the biomass of charcoal ash particle
Combustion gas is sent to admission line, bringing-up section is transmitted back to by playpipe by high temperature Powder discharging fan, is completed biological fuel gas and was recycled
Journey.In above-mentioned cone diffuser and settling section, residual volatiles and carbon residue in biological fuel gas and carbon granule proceed reaction.
As flow velocity is gradually reduced, the charcoal ash of slightly larger particle diameter settle delay in section, continue to reaction.After the reduction of charcoal ash concentration
Fluid continuously enters high temperature cyclone separator.The height of settling section is not less than 1.5m, is not more than under 0.3m/s operating modes in flow velocity, not
The carbon granule that reaction is finished can be stopped at least 5 seconds in settling section.
In some embodiments, cone diffuser size is more than cone heating section；The settling section with diameter greater than heat
Solve the diameter of section.This pyramidal structure for gradually expanding from the bottom to top makes fluid velocity and residence time of material symbol in each section of gasification furnace
The characteristic of symphysis material pyrolysis gasification, so as to reach preferable pyrolytic gasification effect.
In some embodiments, leakage-proof type feeding structure include with cone heating section communicate feeding screw,
Feeding screw is provided with the biomass material storehouse communicated with feeding screw, and feeding screw and biomass material storehouse it
Between the star-like feeder that is provided with.The combination of this equipment can prevent air sucked from feed bin or combustion gas through screw feeder to leaking
Leakage.Thus, start to dry and preliminary pyrolytic reaction, pyrolytic gasification reaction is then produced in pyrolysis section.Material is in further warm
Oxidation reaction heat release is carried out while solution in the presence of gasifying agent, concentrated phase area DIE Temperature is 800 DEG C, produces biological fuel gas
And the macromolecular hydrocarbon such as pyrolytic tar.In cone diffuser, material further carries out reduction reaction, produces one to aoxidize
The fuel gas such as carbon and hydrogen.As diffuser sectional area gradually expands, final fluid velocity drops to no more than 0.3m/s, is
Material uniformly, is fully reacted there is provided good condition.
In some embodiments, cone heating section, be that flange connects between pyrolysis section, cone diffuser and settling section
Connect or be welded to connect.
In some embodiments, cone heating section forms the concentrated phase area of fluid bed with pyrolysis section the latter half；Described
Pyrolysis section top half forms the dilute-phase zone of fluid bed with cone diffuser lower half.Thus, concentrated phase area is material in concentrated phase area
It is interior to stop 4 to 5 minutes, absorb heat and be also pyrolyzed out most of fugitive constituent and form carbon granule simultaneously.Concentrated phase area volume should be greater than this
4 to 5 times of period input volume of material.Fluid bed dilute-phase zone is made up of the lower half and diffuser of pyrolysis section, and material is in dilute phase
Pyrolytic gasification is continued in area., not less than 4m, under flow velocity 2m/s operating modes, the carbon granule that unreacted is finished can for the height of pyrolysis section
At least stopped in settling section 2 seconds.Above-mentioned high temperature Powder discharging fan is extracted by high temperature pump-line on cone diffuser top
The mixture of biological fuel gas and charcoal ash particle, is then transmitted back to cone heating section top (fluid bed by high temperature air-inlet pipe road
Concentrated phase area), make the charcoal ash particle containing volatile matter and carbon residue for not obtaining fully reacting be again introduced into further being completed in stove
Reaction.Heat is discharged to " raw material " in this part biological matter combustion gas simultaneously and charcoal ash particle bringing-up section, accelerates its programming rate, risen
To the function of substituting fluidized bed material accumulation of heat.
In some embodiments, fluidized gasification furnace body side is provided with the high-temperature separator communicated with settling section.
In some embodiments, the body communicated with cone heating section is provided with high-temperature separator；Described body
The fly ash carry device being provided with.Thus, biological fuel gas are transported to by high-temperature separator with 550 DEG C to 800 DEG C of hot combustion gas
Extended furnace.
The present invention uses fluid bed, it is possible to use the less raw material of granularity, the requirement to ash content is not also high；Synthesis
Combustion gas is used in the way of recirculation flow as the working media in fluid bed.Artificial fuel gas and gasifying agent anabolic reaction device
Interior Fluidization wind rate, for the goods fluid in reactor provides power.According to the change of feed stock for blast furnace species, quality and property,
The ratio of regulation artificial fuel gas and gasifying agent, makes the Fluidization wind rate of reactor be maintained at more than critical Reynolds number.So for not
Same biomass material can be operated with efficiency very high.
According to conventional project experiences, when using stalk biomass raw material, there is volatile matter higher and residual in flying dust
Carbon, so after using recirculating process, can effectively reduce volatile matter that the flying dust in final biological fuel gas takes away and residual
Carbon, makes overall rate of gasification and biological fuel gas calorific value be significantly improved.Plus the structure design and flow control of body of heater, make
The time lengthening of pyrolytic gasification reaction, reaches more preferable reaction effect.
The fluidized-bed structure gasification efficiency and the intensity of gasification that the present invention is used are all higher, therefore, the section of its gasification furnace
Smaller, structure is compact, and floor space is small.Whole system device is all formed by connecting using relatively simple structure, either
It is all more stable and simple that the system operation stage still overhauls the stage.Pyrolysis section and diffuser use inverted pyramidal structures, cone angle
It it is 10 °, cone angle is more than charcoal ash particle natural packing angle, can prevent stacking material on reactor wall.
The gas deliverability of fluidized gasification is allowed to be fluctuated in relatively large range, and gasification efficiency will not be reduced substantially.This
Invention because employ biological fuel gas recirculating system, the biological fuel gas and gasifying agent of circulation together as fluidizing agent,
By changing the proportioning of biological fuel gas and gasifying agent, and then very strong Load Regulation ability is reached, can be in system underload
When ensure production efficiency higher.
When fluidized bed pyrolysis reactor is run in running on the lower load, warp in bringing-up section and pyrolysis section (fluid bed concentrated phase area)
Often there is the phenomenon less than critical fludization velocity, goods fluid state labile in concentrated phase area.At this moment biomass material is easily produced
Hardened or coking, and then destroy the normal fluidized state of material.The fuel particle that fluid bed is used is thinner, and specific surface area is big, holds
It is easy to get to heat transfer efficiency higher, gasification reaction temperature levels are easily-controllable and equilibrium, weaken the possibility of slagging scorification.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Specific embodiment
Invention is described in further detail below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of fluidized bed pyrolysis gasification installation of use biological fuel gas recirculating process, including fluid bed
Gasification furnace body 01, the gasifying agent supply structure 02 that is provided with the bottom of fluidized gasification furnace body 01 and in fluidized gasification
The leakage-proof type feeding structure 03 that the side of furnace body 01 is provided with, and the biomass fuel being provided with fluidized gasification furnace body 01
Gas loop structure 04；Fluidized gasification furnace body 01 includes cone heating section 11, the pyrolysis section being provided with cone heating section 11
12 and the cone diffuser 13 that is provided with pyrolysis section 12, and the settling section 14 being provided with cone diffuser 13.Gasifying agent is supplied
The isobaric bellows 21 that include connect with cone heating section 11 to structure 02, between isobaric bellows 21 and cone heating sections 11 in
The air distribution plate 22 that portion is provided with, and the blast cap 23 being provided with isobaric bellows 21.Biological fuel gas loop structure 04 is included in cone
Diffuser 13 is provided with the high temperature pump-line 41 that is communicated with the top of cone diffuser 13 and is provided with high temperature pump-line 41
Powder discharging fan 42, and be provided with Powder discharging fan 42 with the cone heating section admission line 43 that communicates of 11 tops and in air inlet pipe
The end of road 43 is provided with the playpipe 44 extended to inside cone heating section 11.The different cross section of fluidized gasification furnace body 01
Cylinder and bullet be combined into, the vertical structure of flaring from the bottom to top, the feature such as sectional areas and height of difference segmentation
Size can be adjusted according to actual requirement.Wherein the flaring angle of bringing-up section 6 is 10 °, and the flaring angle of diffuser 8 is also
10°.The factors such as density, particle diameter, specific surface area in view of charcoal ash particle, into bringing-up section 3 flow velocity for 1.5 to 2.5m/s,
The flow velocity of pyrolysis section 12 is 2m/s, and the flow velocity that diffuser 13 is exported to settling section 14 is no more than 0.3m/s.On diffuser top
There is high temperature pump-line 41, the biological fuel gas for carrying charcoal ash particle are sent to admission line 43, pass through by high temperature Powder discharging fan 42
Playpipe 44 is transmitted back to bringing-up section, completes biological fuel gas process recycling.It is raw in above-mentioned cone diffuser 13 and settling section 14
Residual volatiles and carbon residue in substance combustible gas and carbon granule proceed reaction.As flow velocity is gradually reduced, the charcoal of slightly larger particle diameter
Ash is settled in section and is detained, and continues to reaction.Fluid after the reduction of charcoal ash concentration continuously enters high temperature cyclone separator 05.
The height of settling section 14 is not less than 1.5m, is not more than under 0.3m/s operating modes in flow velocity, and the carbon granule that unreacted is finished can be in settling section
At least stopped 5 seconds in 14.The size of cone diffuser 13 is more than cone heating section 11.Settling section 14 with diameter greater than pyrolysis section 12
Diameter.Leakage-proof type feeding structure 03 include with cone heating section 11 communicate feeding screw 31, in feeding screw 31
The biomass material storehouse 32 communicated with feeding screw 31 is provided with, and between feeding screw 31 and biomass material storehouse 32
The star-like feeder 33 being provided with.Start to dry and preliminary pyrolytic reaction, pyrolytic gasification reaction is then produced in pyrolysis section 12.Thing
Material carries out oxidation reaction heat release while further pyrolysis in the presence of gasifying agent, and concentrated phase area DIE Temperature is 800 DEG C, is produced
The macromolecular hydrocarbon such as raw biological fuel gas and pyrolytic tar.In cone diffuser 13, material is further reduced
Reaction, produces the fuel gas such as carbon monoxide and hydrogen.As diffuser sectional area gradually expands, final fluid velocity drops to
No more than 0.3m/s, for material is uniform, fully reaction provide good condition.Cone heating section 11, pyrolysis section 12, cone expands
It is that flange is connected or is welded to connect between pressure section 13 and settling section 14 4.Cone heating section 11 and the latter half of pyrolysis section 12
The concentrated phase area of fluid bed is formed, the top half of pyrolysis section 12 forms the dilute-phase zone of fluid bed with the lower half of cone diffuser 13.It is dense
Phase region is that material is stopped 4-5 minutes in concentrated phase area, absorbs heat and is also pyrolyzed out most of fugitive constituent and forms carbon granule simultaneously.It is dense
Phase region volume should be greater than 4 to 5 times of this period input volume of material.Material continues to pyrolytic gasification in dilute-phase zone.Pyrolysis
Not less than 4m, under flow velocity 2m/s operating modes, the carbon granule that unreacted is finished can at least be stopped 2 seconds the height of section 12 in settling section 14
Clock.Above-mentioned high temperature Powder discharging fan 42 extracts biological fuel gas and charcoal ash by high temperature pump-line 41 on the top of cone diffuser 13
The mixture of particle, is then transmitted back to cone heating 11 tops of section (fluid bed concentrated phase area) by high temperature air-inlet pipe road 43, makes not have
There is the charcoal ash particle containing volatile matter and carbon residue for obtaining fully reacting to be again introduced into stove further completing reaction.While this portion
Mitogenetic substance combustible gas and charcoal ash heating particulates section introversive " raw material " release heat, accelerate its programming rate, play replacement fluid bed
The function of bed accumulation of heat.The side of fluidized gasification furnace body 01 is provided with the high-temperature separator 05 communicated with settling section 14.High temperature
The body communicated with cone heating section 11 is provided with separator 05.The fly ash carry device 06 that body is provided with.Biological fuel gas
By high-temperature separator 05, extended furnace is transported to 550 DEG C to 800 DEG C of hot combustion gas.
Above-described is only some embodiments of the present invention.For the person of ordinary skill of the art, not
On the premise of departing from the invention design, various modifications and improvements can be made, these belong to the protection domain of invention.
Claims (7)
1. a kind of fluidized bed pyrolysis gasification installation of use biological fuel gas recirculating process, it is characterised in that including fluid bed
Gasification furnace body, the gasifying agent supply structure that is provided with the bottom of fluidized gasification furnace body and in fluidized gasification furnace body
The leakage-proof type feeding structure that side is provided with, and the biological fuel gas loop structure being provided with fluidized gasification furnace body；
Described fluidized gasification furnace body is including cone heating section, the pyrolysis section being provided with cone heating section and in pyrolysis section
The cone diffuser being provided with, and the settling section being provided with cone diffuser；
Described gasifying agent supply structure includes isobaric bellows connect with cone heating section, in isobaric bellows and cone heating section
Between the air distribution plate that is provided with of inside, and the blast cap being provided with isobaric bellows；
Described biological fuel gas loop structure is included in cone diffuser and is provided with the high temperature communicated with cone diffuser top
Pump-line and the Powder discharging fan being provided with high temperature pump-line, and be provided with Powder discharging fan and cone heating section top phase
Logical admission line and the playpipe for extending to cone heating intersegmental part is provided with admission line end.
2. the fluidized bed pyrolysis gasification installation of a kind of use biological fuel gas recirculating process according to claim 1, its
It is characterised by, described cone diffuser size is more than cone heating section；The diameter with diameter greater than pyrolysis section of the settling section.
3. the fluidized bed pyrolysis gasification installation of a kind of use biological fuel gas recirculating process according to claim 2, its
It is characterised by, described leakage-proof type feeding structure includes the feeding screw communicated with cone heating section, in feeding screw
The biomass material storehouse communicated with feeding screw is provided with, and the star being provided between feeding screw and biomass material storehouse
Type dispenser.
4. the fluidized bed pyrolysis gasification of a kind of use biological fuel gas recirculating process according to claim 1,2 or 3 is filled
Put, it is characterised in that described cone heating section, between pyrolysis section, cone diffuser and settling section be flange connection or
Person is welded to connect.
5. the fluidized bed pyrolysis gasification installation of a kind of use biological fuel gas recirculating process according to claim 1, its
It is characterised by, described cone heating section forms the concentrated phase area of fluid bed with pyrolysis section the latter half；Described pyrolysis section upper half
Part forms the dilute-phase zone of fluid bed with cone diffuser lower half.
6. the fluidized bed pyrolysis gasification installation of a kind of use biological fuel gas recirculating process according to claim 1, its
It is characterised by, described fluidized gasification furnace body side is provided with the high-temperature separator communicated with settling section.
7. the fluidized bed pyrolysis gasification installation of a kind of use biological fuel gas recirculating process according to claim 6, its
It is characterised by, the body communicated with cone heating section is provided with described high-temperature separator；Described body is provided with flying dust
Conveyer.
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| CN108192671A (en) * | 2018-02-11 | 2018-06-22 | 广东国能中林实业有限公司 | A kind of fluidized bed pyrolysis device for preparing high heating value biological fuel gas |
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| CN112556320A (en) * | 2020-12-25 | 2021-03-26 | 江苏科技大学 | Fluidized bed pipeline device for improving wet particle conveying uniformity |
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| CN115485059A (en) * | 2020-04-03 | 2022-12-16 | Fl史密斯公司 | Reactor and process for conversion of carbonaceous material |
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