CN103666569B - Biomass gasification system - Google Patents
Biomass gasification system Download PDFInfo
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- CN103666569B CN103666569B CN201210353295.1A CN201210353295A CN103666569B CN 103666569 B CN103666569 B CN 103666569B CN 201210353295 A CN201210353295 A CN 201210353295A CN 103666569 B CN103666569 B CN 103666569B
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- gas
- aerogenesis
- biomass gasification
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- 238000002309 gasification Methods 0.000 title claims abstract description 61
- 239000002028 Biomass Substances 0.000 title claims abstract description 54
- 239000007789 gas Substances 0.000 claims abstract description 85
- 239000000567 combustion gas Substances 0.000 claims abstract description 27
- 239000002737 fuel gas Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000000446 fuel Substances 0.000 claims abstract description 10
- 239000002893 slag Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000007599 discharging Methods 0.000 claims description 17
- 239000000779 smoke Substances 0.000 claims description 9
- 238000010992 reflux Methods 0.000 claims description 7
- 230000002459 sustained effect Effects 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000003546 flue gas Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 230000006978 adaptation Effects 0.000 abstract 1
- 239000000428 dust Substances 0.000 description 20
- 238000005336 cracking Methods 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 6
- 239000011269 tar Substances 0.000 description 6
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000003063 flame retardant Substances 0.000 description 5
- 230000000740 bleeding effect Effects 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000011286 gas tar Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229910052571 earthenware Inorganic materials 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000006200 vaporizer Substances 0.000 description 2
- 206010002660 Anoxia Diseases 0.000 description 1
- 241000976983 Anoxia Species 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000007953 anoxia Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- Solid-Fuel Combustion (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a kind of biomass gasification system, it includes multisection type fixed bed biomass gasification furnace, this multisection type fixed bed biomass gasification furnace includes longitudinally disposed body of heater, body of heater includes being positioned at boring bucket-shaped tail ash section and being positioned at least two aerogenesis section on described tail ash section of bottom, this at least two aerogenesis section is longitudinally disposed and end to end, tail ash section and be provided with fire grate between the aerogenesis section of bottom；The sidepiece of each aerogenesis section is equipped with gas outlet；Each gas outlet is all connected with a combustion gas subtube, and a plurality of combustion gas subtube is connected to a gas header pipe road；The bottom of tail ash section is provided with slag notch, and the sidepiece of tail ash section is provided with air inlet；The upper side or the top that are positioned at the aerogenesis section at top are provided with fuel inlet.The gasification furnace structure of the present invention is compact；Biomass material water adaptability is the highest, breaches the strict demand to moisture of the current traditional gasification stove；The exchangeability of institute's output is controlled, can adjust the biological fuel gas of adaptation according to different user demands；Because being suitable for multistage aerogenesis technique, so gasification efficiency is higher than traditional gasification stove.
Description
Technical field
The present invention relates to a kind of biomass gasification system.
Background technology
Living beings are highly important regenerative resources, have recyclability, low stain and extensively
The features such as distributivity.Utilize the living beings energy as an alternative, to low-carbon emission reduction, reduce " greenhouse effect
Should " and improve air acid rain environment have be of great significance.Biomass gasification system is exactly profit
With living beings airtight anoxia burning in gasification furnace, produce after being aoxidized by carbonization and heat chemistry
Fuel gas.Fixed bed biomass gasification furnace is conventional biomass gasifying furnace.Currently used is fixing
Bed biomass gasifying stove mainly includes uniflow gas stove and down-draft type gasifying furnace.
Such as, Chinese patent application 200810010318 discloses a kind of updraught stalk gasification furnace,
It includes body of heater, the hydroecium of band water inlet pipe mouth；The bottom of body of heater inner chamber is provided with fire grate assembly, and it will
The inner chamber of body of heater is divided into room and lower room；The top of upper room is furnished with charge door and gas outlet；At stove
It is furnished with medium channel in intracoelomic cavity heat-insulation layer；It is furnished with dielectric distribution device in lower indoor；Medium channel
Entrance communicates with the effluent pipe mouth of hydroecium by the road；The outlet of medium channel divided with medium through communicating pipe
The entrance of cloth device communicates；The bottom of dielectric distribution device is furnished with and portals.
Chinese patent application 200910116779 discloses a kind of household up-draft biomass gasification dress
Putting, it is upright cylindrical structure；Its structure by the destructive distillation room of epimere, the main vaporizer in stage casing and under
The grey room of section is constituted, and each section is separated by accumulation of heat grid and accumulation of heat grate respectively；The surrounding of main vaporizer
Gone along with sb. to guard him by radiation cylinder.
Chinese patent application 201010152803 discloses a kind of family updraft type tar-free biomass
Gasification direct combustion stove, the lower end of gas-cooker is arranged in annular water tank, along its circle on the sidewall of gas-cooker
Circumferential direction is provided with multiple Secondary Air hand-hole, and the bottom face of gas-cooker is provided with multiple combustion gas discharge port, stove
Thorax is communicated with multiple combustion gas discharge ports by the centre bore of annular water tank, sets between flame retardant coating and interior furnace tube
Having air preheating chamber, air preheating chamber constitutes spiral air by the spiral septum arranged in it
Preheating chamber, the lower end of spiral air preheating chamber is preheated air outlet, and the top edge of ash bucket is with interior
The lower end inner wall of furnace tube is close to mutually, and it is indoor that lower end is arranged on ash.
It is biological that Chinese patent application 201010152802 discloses a kind of downdraft secondarily cracking tar
Matter gasification furnace, in it, the lower end of furnace tube is arranged in ash silo, and moving grate is arranged on reduction indoor
Lower section, is provided with gas secondary cracking room between flame retardant coating and interior furnace tube, the lower end outer wall of interior furnace tube with
Forming gas secondary cracking room entrance between flame retardant coating inwall, one end of air inlet pipe passes burner hearth reducing
The sidewall of outer furnace tube, heat-insulation layer, flame retardant coating, gas secondary cracking room and the interior furnace tube sidewall of top
Communicating with burner hearth, the other end is threadeded with closure, and the sidewall of closure is provided with multiple air admission hole,
Escape pipe communicates through the sidewall of outer furnace tube, heat-insulation layer, flame retardant coating with gas secondary cracking room.
Chinese patent application 201110192886 discloses a kind of Downdraft biomass fuel gasifier,
It includes having burner hearth and have the gasification furnace body of heater of fire grate, gasification furnace body of heater in the bottom of burner hearth
Inwall and the outer wall of burner hearth between constitute have outlet chamber, burner hearth be formed from top to bottom dry section,
Cracking zone, zoneofoxidation and reducing zone；Escape pipe, bleed mechanism and CO gas filter and
Cause the CO gas filter mechanism of burner combustion, one end of escape pipe and gasification furnace body of heater
Connecting, and communicate with outlet chamber, the other end of escape pipe is connected with bleed mechanism, bleed mechanism and
CO gas filter mechanism pipeline connects, and the internal diameter of burner hearth is received at the position corresponding to zoneofoxidation
Shorten less than the internal diameter of cracking zone but also less than the internal diameter of reducing zone structure into.
The deficiency of technique scheme is: having in actual production of updraft type fixed-bed gasification furnace
Two serious problems, one is that produced substance combustible gas tar content is high and temperature is low, and this just leads
Causing have a large amount of tar to separate out in gas pipeline, and then block pipeline, another problem is that fire grate is easy
Scaling loss.Down-draft type gasifying furnace also has two critical defects, one make that fuel gas temperature is higher, calorific value relatively
Low, be unfavorable for follow-up equipment type selecting, another problem is also fire grate scaling loss.
Therefore, a kind of biogas that temperature is adjustable, tar content is controlled exporting combustion gas how is provided
Change system becomes the problem that industry needs to solve.
Summary of the invention
For the shortcoming of prior art, it is an object of the invention to provide a kind of temperature exporting combustion gas can
The biomass gasification system that tune, tar content are controlled.
To achieve these goals, the invention provides a kind of biomass gasification system, it includes many
Segmentation fixed bed biomass gasification furnace, this multisection type fixed bed biomass gasification furnace includes longitudinally disposed
Body of heater, body of heater includes being positioned at boring bucket-shaped tail ash section and being positioned on described tail ash section at least of bottom
Two aerogenesis sections, this at least two aerogenesis section is longitudinally disposed and end to end, tail ash section and be positioned at bottom
Aerogenesis section between be provided with fire grate；The sidepiece of each aerogenesis section is equipped with gas outlet；Each combustion gas goes out
Mouth is all connected with a combustion gas subtube, and a plurality of combustion gas subtube is connected to a gas header pipe road；Tail ash section
Bottom be provided with slag notch, the sidepiece of tail ash section is provided with air inlet；It is positioned at the top of the aerogenesis section at top
Side or top are provided with fuel inlet.
In the present invention, the shape of aerogenesis section can be cylindric or square tube shape, and it is preferably cylindrical shape；Often
The size of individual aerogenesis section such as height, diameter, width can identical can also differ.
In the present invention, the number of aerogenesis section is two or more, preferably 2-4.
In the present invention, the gas outlet of each aerogenesis section is preferably arranged at the upper end of its sidepiece.
In the present invention, combustion gas subtube that the gas outlet of each aerogenesis section is connected and after converging
Gas header pipe road carries out inside holding or external thermal insulation, and to avoid heat losses, the beneficially combustion gas in downstream is used
Family uses.
In the present invention, the air inlet of tail ash section sidepiece can connect intake stack, is sent by air blast
Wind.
In the present invention, the gas content that each aerogenesis section produces is different, the produced combustion of upper sector body of heater
Gas tar content is high, calorific value is higher, temperature is low, and fuel gas temperature produced by relatively low section of body of heater is higher,
Calorific value is relatively low.By combustion gas produced by multistage bodies of heater different for height is exported and mixes, can be whole
Close the different physicochemical characteristics of each produced combustion gas of aerogenesis section, adjust out comparatively ideal biomass fuel
Gas, makes the temperature of combustion gas and calorific value uniform.Owing to have employed multistage aerogenesis technique, thus gasification efficiency
Higher.It can in addition contain improve biomass gasifying furnace volume yield rate (or cross section factor of created gase), reduce gas
Change furnace apparatus to put into.Multisection type fixed bed biomass gasification furnace compact conformation simultaneously, volume rate of gasification is relatively
Height, production maintenance is more convenient.
According to another detailed description of the invention of the present invention, each combustion gas subtube all arranges flow adjustable
Valve.The ratio of each section of combustion gas output can be regulated by control valve, so that the biology of institute's output
Matter fuel gases calorific value is stable, physical characteristic such as temperature is adjustable in certain scope, it is simple to for the later stage
Application apparatus is adjusted.
According to another detailed description of the invention of the present invention, multisection type fixed bed biomass gasification furnace wraps further
Include feed arrangement and blanking pipeline；The top of the aerogenesis section being positioned at top is provided with fuel inlet, material blanking tube
Road inserts this fuel inlet；The top blocking of blanking pipeline, the sidepiece of blanking pipeline is provided with charging aperture,
The end of feed arrangement is passed through this charging aperture；The sidepiece of blanking pipeline or top are additionally provided with circulating gas and go out
Mouthful, the outlet of this circulating gas connects a fuel gas return-flow pipeline, and the sidepiece of tail ash section is provided with reflux inlet,
The other end of fuel gas return-flow pipeline is connected to the reflux inlet of tail ash section.
In the program, in order to reach more preferable drying effect, the sidepiece charging aperture in material blanking tube road can be made
Arrange less than circulating gas outlet, and then make from the biological particles of this throat-fed whole land
Individual process all can the interior gas risen of contact furnace.
In the program, feed arrangement can be various suitable feed arrangement, and such as it can be helical feed
Machine is to realize continuous feed, it is possible to for cylinder valve (push-pull valve) to carry out being interrupted charging.
In the program, fuel gas return-flow pipeline can arrange air-introduced machine, to ensure the orientation of gas in pipelines
Flowing.
Usual aqueous 40%-50% is the highest for biological particles, and carry out during gasification of biomass the most suitable
Water content be less than 20%.Export by arranging circulating gas at the sidepiece of blanking pipeline or top, make
The gas being positioned at blanking pipeline can flow outwardly, and then makes the part hot gas in body of heater through material blanking tube
The lower ending opening in road enters, and forms the stream in blanking pipeline from bottom to top of the part hot gas in body of heater
Logical, the biological particles in blanking pipeline is dried.And flow outwardly through circulating gas outlet
Moist hot gas through fuel gas return-flow pipeline and reflux inlet, the high-temperature region being returned to stove inner bottom part participates in
Gasification.Thus, this programme is by arranging circulating gas outlet, fuel gas return-flow pipeline and reflux inlet,
Achieve from drying function；Without using extra drying unit and the means of drying, both achieved
Making full use of of resource, turn avoid pollution environment, makes gasification furnace for the water of biomass material simultaneously
Divide adaptability the highest, breach the strict demand to moisture of the current traditional gasification stove.
According to another detailed description of the invention of the present invention, feed arrangement is multistage feed arrangement, and how grading this is
Material device at least includes that chopped-off head feed arrangement, final stage feed arrangement, each grade of feed arrangement all include position
In the charging aperture of front upper and be positioned at the discharging opening of end；Chopped-off head feed arrangement, final stage feed
Device is arranged up and down；The discharging opening of chopped-off head feed arrangement is directly connected to the charging aperture of final stage feed arrangement
Communicate, or by the middle of one or more levels between chopped-off head feed arrangement and final stage feed arrangement
Feed arrangement is indirectly connected with communicating with the charging aperture of final stage feed arrangement；Chopped-off head feed arrangement and each institute
The end stating middle feeding device is equipped with the middle hopper of closing, chopped-off head feed arrangement and each centre
The discharging opening of device for transporting objects is connected with the charging aperture of its next stage feed arrangement by its middle hopper
Communicate；The discharging opening of final stage feed arrangement is connected to the charging aperture of biomass gasifying furnace.
The charging aperture of chopped-off head feed arrangement is the combined feed mouth of whole multistage feed arrangement, final stage charging dress
The discharging opening put is total discharging opening of whole multistage feed arrangement.Due to biomass material light weight and volume
Little, easy four dissipate floating, cause dust pollution.In the utility model, the middle hopper of closing is permissible
Effectively prevent biomass material diffusion when upper level feed arrangement enters next stage feed arrangement.Stove
Front multistage feed arrangement is for being delivered to the biomass material in feed bin in biomass gasifying furnace.Feed bin
Interior biomass material inputs to the charging aperture of chopped-off head feed arrangement.The blanking port of feed bin enters with chopped-off head
The middle hopper of closing is may also set up, to prevent material from spreading between the charging aperture of material device.
Connected by the middle hopper closed between multistage feed arrangement, and feed arrangement at different levels by arranging
Connect and communicate, when feed arrangement carries biomass material, can be prevented effectively from biomass gasifying furnace
Gas enter feed bin along feed arrangement anti-channeling, and then the feed bin preventing the anti-cigarette of equipment from causing makes somebody a mere figurehead
Arch, the accident such as blanking is smooth, personnel's poisoning and feed bin blast.
According to another detailed description of the invention of the present invention, it farther includes dust arrester, gas header pipe road
Being passed through this dust arrester, dust arrester includes ash hole and gas outlet, and gas outlet connects Gas Pipe
Road, this gas pipeline can arrange air-introduced machine, to ensure the directed flow of gas in pipelines.By setting
Put dust arrester, the combustion gas obtained is carried out dust removal process, to avoid polluting under environment and dust blocking
Play pipe road.According to another detailed description of the invention of the present invention, dust arrester be monotubular cyclone dust collector,
Or multi-cyclone dust arrester or earthenware dust removal by filtration device or moving bed dust removal by filtration device.
According to another detailed description of the invention of the present invention, each aerogenesis section is provided with multiple gas outlet, and these are many
Individual gas outlet is positioned at sustained height.The gas outlet number of every section of body of heater can be consistent, it is possible to differs
Cause.The gas outlet number of every section of body of heater is preferably 1-5.It is preferably, multiple combustions of every section of body of heater
Gas outlet is uniformly distributed at a certain angle at sustained height.
It is said that in general, be not required to arrange discharge in body of heater, the gas outlet of every section of body of heater is furnace wall exhaust
Mouthful.As required, according to another detailed description of the invention of the present invention, in each aerogenesis section, it is equipped with gas collection
Pipe, discharge includes longitudinally disposed house steward and is connected to the multiple of described house steward and is in charge of, Duo Gefen
Pipe correspondence respectively inserts multiple gas outlets.
According to another detailed description of the invention of the present invention, fire grate is water-cooled grate, and this water-cooled grate includes many
The fire grate bar of bar parallel arranged, every bar oven tier pole is the pipe fitting (example with cavity that Heat Conduction Material is made
Such as metal tube or earthenware), water-cooled grate includes the driving motor rotated for driving fire grate bar to carry out.
By making the fire grate bar of fire grate rotate, can promote that the lime-ash piled up on fire grate is from the gap of fire grate
Drop, and then reach preferable deslagging effect.
According to another detailed description of the invention of the present invention, every bar oven tier pole be mounted on can this fire grate bar be
Rotary shaft carries out the blade rotated, and this blade is respectively positioned in the body of heater of gasification furnace.By driving motor belt motor
Dynamic fire grate bar rotates, and then drives the blade on fire grate bar to rotate, it is possible to achieve preferably deslagging effect,
Effectively fire grate is carried out the most actively scarfing cinder, prevents lime-ash from piling up on fire grate.Specifically, leaf
Sheet can be spirality, multi-edge column-shaped or blade-shaped.
The lime-ash discharged for slag notch and ash hole, can use the multiple means of prior art to carry out defeated
Send, such as, can outwards be carried by water-cooled auger, while realizing conveying, lime-ash be lowered the temperature.
According to another detailed description of the invention of the present invention, the system of the present invention farther includes wet-type deslagging device,
Ash tube that this wet-type deslagging device includes being connected with slag notch and ash hole, conveying worm, tank,
The bottom of ash tube is passed through conveying worm；Conveying worm is obliquely installed, and its end opens below into water
In groove.Tail ash in gasification furnace and the ash content collected by dust arrester are by ash tube, conveying worm
It is transported in tank, thus avoids flying dust to pollute environment.
According to another detailed description of the invention of the present invention, it farther includes bleeding device, and bleeding device leads to
Piping connects gas pipeline, and includes valve.
According to another detailed description of the invention of the present invention, the sidepiece of gasification furnace body of heater is provided with smoke backflow entrance,
This smoke backflow entrance connects smoke backflow pipeline, and the other end of this smoke backflow pipeline is connected to downstream
With the flue gas exit pipe road of gas unit.By by the CO by gas unit2Backflow, adds CO2With C
Generate the reaction of CO, simultaneously smoke backflow surely can the waste heat of band reuse heat unit, thus realize
Raising efficiency of carbon con version and overall thermal efficiency.CO simultaneously2At high temperature can aoxidize tar so that it is
Become hydrocarbon gas or CO, decrease tar content.By improve carbon conversion efficiency and
Utilize with heating kiln furnace flue gas exhaust heat, substantially increase the efficiency of whole system.
Due to CO the most rare in gasification furnace2, the charcoal ash discharged out of the furnace can be sent into stove again
Interior participation is reacted.Specifically, the tail ash conveying dress of gasification furnace tail ash conveying device and dust arrester
The end put can lead to feed bin, is then entered in gasification furnace by feed arrangement and reacts, thus
Realize the circulation of charcoal ash.
Compared with prior art, the present invention possesses following beneficial effect:
In the present invention, the gas content difference that each section of body of heater produces, the produced combustion of upper sector body of heater
Gas tar content is high, calorific value is higher, temperature is low, and fuel gas temperature produced by relatively low section of body of heater is higher,
Calorific value is relatively low.By combustion gas produced by multistage bodies of heater different for height is exported and mixes, can be whole
Close the different physicochemical characteristics of each produced combustion gas of aerogenesis section, adjust out comparatively ideal biomass fuel
Gas, makes the temperature of combustion gas and calorific value uniform.Owing to have employed multistage aerogenesis technique, thus gasification efficiency
Higher.It can in addition contain improve biomass gasifying furnace volume yield rate (or cross section factor of created gase), reduce gas
Change furnace apparatus to put into.Multisection type fixed bed biomass gasification furnace compact conformation simultaneously, volume rate of gasification is relatively
Height, production maintenance is more convenient.Additionally, the present invention can extend the scaling loss cycle of fire grate, reach industry
Change degree.
The present invention is described in further detail below in conjunction with the accompanying drawings.
Accompanying drawing explanation
Fig. 1 is the structural representation of the biomass gasification system of embodiment 1；
Fig. 2 is the structural representation of the multisection type fixed bed biomass gasification furnace in embodiment 1；
Fig. 3 is the structural representation of the two-stage feed arrangement in embodiment 3；
Fig. 4 is the structural representation of the fire grate in embodiment 4.
Detailed description of the invention
Embodiment 1
As Figure 1-Figure 2, the biomass gasification system of the present embodiment, including multisection type fixed bed
Biomass gasifying furnace 1, dust arrester (such as monotubular cyclone dust collector 2), bleeding device 3, wet type
Slag-draining device 4.
Wherein, multisection type fixed bed biomass gasification furnace 1 includes feed arrangement 111(such as conveying worm),
Blanking pipeline 11, body of heater.Flame-proof thermal insulation material is built by laying bricks or stones, including the first aerogenesis section 12, second in body of heater
Aerogenesis section 13, tail ash section 14.The top of the first aerogenesis section 12 is provided with fuel inlet.
Tail ash section 14 is bucket-shaped for cone, is positioned at the bottom of body of heater.The bottom of tail ash section 14 is provided with slag notch
142, the sidepiece of tail ash section 14 is provided with air inlet 145 and reflux inlet 141, and this air inlet 145 connects
Intake stack 144, is blown by air blast 143.
Blanking pipeline 11 inserts the fuel inlet on the first aerogenesis section 12 top.The top of blanking pipeline 11
Blocking, the sidepiece of blanking pipeline 11 is provided with charging aperture, and the end of feed arrangement 111 is passed through this charging aperture；
The sidepiece of blanking pipeline 11 is additionally provided with circulating gas outlet, and the outlet of this circulating gas connects a fuel gas return-flow
Pipeline 112, fuel gas return-flow pipeline 112 is provided with air-introduced machine 113, another of fuel gas return-flow pipeline 112
End is connected to the reflux inlet 141 of tail ash section 14.
First aerogenesis section 12 and the second aerogenesis section 13 are cylindrical shape, are positioned on tail ash section 14, vertical
To arranging and end to end.It is provided with fire grate 15 between tail ash section 14 and the second aerogenesis section 13.First produces
The sidepiece upper end of gas section 12 is provided with three gas outlet 121(furnace wall exhaust outlets), these three gas outlets
121 are positioned at sustained height, and the angle between adjacent gas outlet is 120 °, each gas outlet 121
It is all connected with a combustion gas subtube 122.The sidepiece upper end of the second aerogenesis section 13 is provided with four gas outlets 131
(furnace wall exhaust outlet), these four gas outlets 131 are positioned at sustained height, between adjacent gas outlet
Angle is 90 °, and each gas outlet 131 is all connected with a combustion gas subtube 132.Every combustion gas is in charge of
Flow adjustable valve is all set on road.A plurality of combustion gas subtube is connected to a gas header pipe road 5.
Gas header pipe road 5 is passed through dust arrester 2, and dust arrester 2 includes ash hole 22 and gas outlet
21, gas outlet 21 connects gas pipeline 6, and this gas pipeline 6 is provided with air-introduced machine 61.
Wet-type deslagging device 4, including the ash tube 411 being connected with the slag notch 142 of tail ash section 14 with
And be connected with the ash hole 22 of dust arrester 2 ash tube 421, conveying worm 412, spiral transferring
Send machine 422, tank 43.The bottom of ash tube 411 is passed through conveying worm 412；Ash tube 421
Bottom is passed through conveying worm 422；Conveying worm 412 and conveying worm 422 are all obliquely installed,
The end of the two all opens below in tank 43.
Bleeding device 3 connects gas pipeline 6 by pipeline, and it has valve.
Embodiment 2
The present embodiment is with the difference of embodiment 1: (1) also includes the 3rd aerogenesis section, and this is years old
Three aerogenesis sections are positioned between the first aerogenesis section and the second aerogenesis section；(2) first aerogenesis sections, the second aerogenesis
Section and the 3rd aerogenesis section are square tube shape；(3) gas outlet of each aerogenesis section is four, and often
In one aerogenesis section, gas outlet is uniformly arranged at sustained height, and the angle between adjacent gas outlet is
90°；(4) be equipped with discharge in each aerogenesis section, discharge include longitudinally disposed house steward and
It is connected to four of house steward be in charge of, is in charge of correspondence respectively for four and inserts four gas outlets.
Embodiment 3
As it is shown on figure 3, the difference of the present embodiment and embodiment 1 is: feed arrangement is two-stage
Feed arrangement 7, it includes chopped-off head feed arrangement 701, middle hopper 702, final stage feed arrangement 703.
Chopped-off head feed arrangement 701 is the open-end auger conveying device of adjustable speed.It includes being positioned at front upper
Charging aperture and be positioned at the discharging opening of end.Before the blanking port of feed bin and chopped-off head feed arrangement 701
Charging aperture connection above portion communicates.The discharging opening of chopped-off head feed arrangement 701 end is angle upwards,
This angle is provided with gland 704.Angle place plane and the axis institute angulation of open-end auger conveying device
Degree is 45 °.Gland 704 has automatic reset mechanism (such as spring 705).It addition, chopped-off head charging
One section of blade before device 701 discharging opening removes.The discharging opening of chopped-off head feed arrangement 701 relative to
Horizontal plane is inclined upwardly 10 °.The middle hopper 702 closed is arranged at the end of chopped-off head feed arrangement 701
End.Being provided with two level-sensing devices in middle hopper 702, one of them is low level level-sensing device 706, another
For high-order level-sensing device 707.Final stage feed arrangement 703 is open-end auger conveying device, and it includes being positioned at
The charging aperture of front upper and be positioned at the discharging opening of end.Its discharging opening is the most upwards
Tilting 15 °, its discharging opening is connected to the material inlet of biomass gasifying furnace 1.Chopped-off head feed arrangement
201, final stage feed arrangement about 203 is arranged；The discharging opening of chopped-off head feed arrangement 201 feeds with final stage
The charging aperture of device 203 is directly connected to communicate by middle hopper 202.
Embodiment 4
As shown in Figure 4, the present embodiment is with the difference of embodiment 1: fire grate is water-cooled grate 8,
It includes driving motor 801, the fire grate bar 802 of a plurality of parallel arranged of adjustable speed.Drive motor 801
For driving every bar oven tier pole 802 to rotate.Every bar oven tier pole 802 is the metal with cavity
Pipe, the two ends of every bar oven tier pole 802 are respectively positioned on outside the body of heater 1 of gasification furnace, every bar oven tier pole 802
Two ends be equipped with water-cooling swivel joint.Every bar oven tier pole 802 is mounted on spiral vane 803, spiral shell
Rotation shape blade 803 can this fire grate bar be that rotary shaft rotates, and spiral vane 803 is respectively positioned on gas
Change in the body of heater of stove.
Although the present invention is disclosed above with preferred embodiment, but it is not limited to the model that the present invention implements
Enclose.Any those of ordinary skill in the art, without departing from the invention scope of the present invention, when making
A little improvement, the most every equal improvement done according to the present invention, should be the scope of the present invention and contained
Lid.
Claims (9)
1. a biomass gasification system, it includes multisection type fixed bed biomass gasification furnace, described
Multisection type fixed bed biomass gasification furnace includes that longitudinally disposed body of heater, described body of heater include being positioned at bottom
Bore bucket-shaped tail ash section and be positioned at least two tubular aerogenesis section on described tail ash section, described extremely
Few two aerogenesis sections are longitudinally disposed and end to end, described tail ash section and between the aerogenesis section of bottom
It is provided with fire grate；The sidepiece of each described aerogenesis section is equipped with gas outlet；Each gas outlet is all connected with
One combustion gas subtube, a plurality of described combustion gas subtube is connected to a gas header pipe road；Described tail ash section
Bottom be provided with slag notch, the sidepiece of described tail ash section is provided with air inlet；It is positioned at the described aerogenesis at top
Upper side or the top of section are provided with fuel inlet；
Described multisection type fixed bed biomass gasification furnace farther includes feed arrangement and blanking pipeline；Position
Be provided with fuel inlet in the top of the described aerogenesis section at top, described blanking pipeline inserts this fuel and enters
Mouthful；The top closure of described blanking pipeline, the sidepiece of blanking pipeline is provided with charging aperture, and described charging fills
The end put is passed through this charging aperture；The sidepiece of described blanking pipeline or top are additionally provided with circulating gas and go out
Mouthful, the outlet of this circulating gas connects a fuel gas return-flow pipeline, and the sidepiece of described tail ash section is provided with and passes back into
Mouthful, the other end of described fuel gas return-flow pipeline is connected to the reflux inlet of described tail ash section.
2. biomass gasification system as claimed in claim 1, wherein, each described combustion gas subtube
On the adjustable valve of flow is all set.
3. biomass gasification system as claimed in claim 1, wherein, described feed arrangement is multistage
Feed arrangement, described multistage feed arrangement at least includes chopped-off head feed arrangement, final stage feed arrangement, often
One-level feed arrangement all includes being positioned at the charging aperture of front upper and being positioned at the discharging opening of end；
Described chopped-off head feed arrangement, final stage feed arrangement are arranged up and down；Going out of described chopped-off head feed arrangement
Material mouth is directly connected to communicate with the charging aperture of described final stage feed arrangement, or by being positioned at described chopped-off head
One or more levels middle feeding device between feed arrangement and final stage feed arrangement feeds with described final stage
The charging aperture of device is indirectly connected with communicating；
The end of described chopped-off head feed arrangement and each described middle feeding device is equipped with the centre of closing
Hopper, the discharging opening of described chopped-off head feed arrangement and each described intermediate material conveying device is by wherein
Between hopper be connected with the charging aperture of its next stage feed arrangement and communicate；
The discharging opening of described final stage feed arrangement is connected to the charging aperture of described biomass gasifying furnace.
4. biomass gasification system as claimed in claim 1, wherein, each described aerogenesis section is provided with
Multiple gas outlets, the plurality of gas outlet is positioned at sustained height.
5. biomass gasification system as claimed in claim 4, wherein, in each described aerogenesis section all
Being provided with discharge, described discharge includes longitudinally disposed house steward and is connected to the multiple of described house steward
Being in charge of, the plurality of correspondence respectively of being in charge of inserts multiple gas outlets.
6. biomass gasification system as claimed in claim 1, wherein, described fire grate is water-cooled stove
Row, described water-cooled grate includes that the fire grate bar of a plurality of parallel arranged, every described fire grate bar are heat conduction
The pipe fitting with cavity that material is made, described water-cooled grate includes for driving described fire grate bar to carry out
The driving motor rotated.
7. biomass gasification system as claimed in claim 6, wherein, every described fire grate bar is all pacified
Equipped with can this fire grate bar be the blade that rotary shaft carries out rotating, described blade be respectively positioned on described gasification furnace
Body of heater in.
8. biomass gasification system as claimed in claim 1, it farther includes wet type deslagging dress
Put, ash tube that described wet-type deslagging device includes being connected with described slag notch, conveying worm, water
Groove, the bottom of described ash tube is passed through described conveying worm；Described conveying worm is obliquely installed,
Its end opens below in described tank.
9. biomass gasification system as claimed in claim 1, the sidepiece of described gasification furnace body of heater is provided with
Smoke backflow entrance, this smoke backflow entrance connects smoke backflow pipeline, this smoke backflow pipeline another
One end is connected to the flue gas exit pipe road of downstream gas unit.
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| CN105062565B (en) * | 2015-07-30 | 2017-08-15 | 东南大学 | A kind of biomass fixed-bed oxygen-rich gasification stove |
| CN105402721A (en) * | 2015-11-12 | 2016-03-16 | 广西诚顺节能环保科技有限公司 | Biomass continuous gasification low-nitrogen combustion machine |
| CN110793020A (en) * | 2018-08-01 | 2020-02-14 | 四川天法科技有限公司 | A kind of biomass burning continuous adjustment device and using method thereof |
| CN108913210B (en) * | 2018-08-29 | 2024-01-23 | 云南煤化集团工程技术有限公司 | Fixed bed slag gasifier cloth temperature regulating device |
| CN110746992B (en) * | 2019-11-29 | 2025-02-18 | 华北水利水电大学 | A side suction oxygen-free medium temperature pyrolysis furnace |
| CN112210406B (en) * | 2020-10-13 | 2022-01-07 | 海泉风雷新能源发电股份有限公司 | Grate-free downdraft biomass particle pyrolysis furnace |
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