CN103666569A - Biomass gasification system - Google Patents
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Abstract
The invention provides a biomass gasification system. The biomass gasification system comprises a multi-section fixed bed biomass gasification furnace, wherein the multi-section fixed bed biomass gasification furnace comprises a furnace body which is arranged in the longitudinal direction, the furnace body comprises a conical-hopper tail ash section which is arranged on the bottom and at least two gas production sections which are arranged on the tail ash section, the two gas production sections are arranged in the longitudinal direction and connected with each other in an end-to-end manner, and a fire grate is arranged between the tail ash section and the gas production section on the bottom; the side part of each gas production section is provided with a gas outlet; each gas outlet is connected with a gas branch pipeline, and a plurality of gas branch pipelines are connected to a gas main pipeline; the bottom of the tail ash section is provided with a slag outlet, and the side part of the tail ash section is provided with an air inlet; the upper side surface or the top end of the gas production section on the top is provided with a fuel inlet. The gasification furnace is compact in structure; the biomass raw material moisture applicability is high, and the strict requirement of the conventional gasification furnace on the moisture can be broken through; the produced gas is controllable in nature, and the appropriate biomass gas can be adjusted according to different requirements of the user; the biomass gasification system is applicable to the multi-section gas production process, so that the gasification efficiency is higher than that of the conventional gasification furnace.
Description
Technical field
The present invention relates to a kind of biomass gasification system.
Background technology
Biomass are very important renewable energy sources, have the features such as recyclability, low contaminative and extensive distributivity.Utilize the biomass energy as an alternative, to low-carbon emission reduction, reduce " Greenhouse effect " and improve atmosphere acid rain environment tool being of great significance.Biomass gasification system utilizes biomass airtight anoxia burning in vapourizing furnace exactly, by producing inflammable gas after carbonization and thermochemistry oxidation.Fixed bed biomass gasification furnace is conventional biomass gasifying furnace.The fixed bed biomass gasification furnace using at present mainly comprises updraft type vapourizing furnace and down-draft type gasifying furnace.
For example, Chinese patent application 200810010318 discloses a kind of updraught stalk gasification furnace, and it comprises body of heater, with the hydroecium of water inlet pipe mouth; The bottom of body of heater inner chamber is provided with fire grate assembly, and its inner chamber by body of heater is divided into Ji Xia chamber, upper chamber; The top of upper chamber is furnished with charging opening and gas outlet; In body of heater inner chamber thermal insulation layer, is furnished with medium channel; At the lower indoor dielectric distribution device of being furnished with; The entrance of medium channel communicates with the effluent pipe mouth of hydroecium by the road; The outlet of medium channel communicated with the entrance of dielectric distribution device through communicating pipe; The bottom of dielectric distribution device is furnished with and portals.
Chinese patent application 200910116779 discloses a kind of household up-draft biomass gasification device, and it is upright cylindrical structure; Its structure consists of the grey chamber of the destructive distillation chamber of epimere, the main vaporizer in stage casing and hypomere, and each section separated by accumulation of heat grid and accumulation of heat grate respectively; The surrounding of main vaporizer is gone along with sb. to guard him by radiation cylinder.
Chinese patent application 201010152803 discloses updraft type tar-free biomass gasification direct-combustion furnace for a kind of family, the lower end of gas-cooker is arranged in annular water tank, on the sidewall of gas-cooker, along its circumferential direction, be provided with a plurality of secondary air hand-holes, the bottom face of gas-cooker is provided with a plurality of combustion gas discharge ports, burner hearth communicates with a plurality of combustion gas discharge ports by the centre hole of annular water tank, between flame retardant coating and interior stove cylinder, be provided with air preheating chamber, air preheating chamber forms spiral air preheating chamber by the spiral septum arranging in it, the lower end of spiral air preheating chamber is preheated air outlet, the upper limb of ash bucket is close to mutually with the lower end inwall of interior stove cylinder, it is indoor that lower end is arranged on ash.
Chinese patent application 201010152802 discloses a kind of down-draught type biomass gasifier for secondarily cracking tar, in it, the lower end of stove cylinder is arranged in ash silo, moving grate is arranged on the indoor below of reduction, between flame retardant coating and interior stove cylinder, be provided with gas secondary cracking room, between the lower end outer wall of interior stove cylinder and flame retardant coating inwall, form gas secondary cracking room entrance, one end of inlet pipe is through the sidewall of the outer furnace tube of burner hearth reducing top, thermal insulation layer, flame retardant coating, gas secondary cracking room and interior stove cylinder sidewall communicate with burner hearth, the other end is threaded with shutoff, the sidewall of shutoff is provided with a plurality of air inlet ports, escape pipe is through the sidewall of outer furnace tube, thermal insulation layer, flame retardant coating communicates with gas secondary cracking room.
Chinese patent application 201110192886 discloses a kind of Downdraft biomass fuel gasifier, it comprises the vapourizing furnace body of heater that has burner hearth and have fire grate in the bottom of burner hearth, between the inwall of vapourizing furnace body of heater and the outer wall of burner hearth, form and have outlet chamber, burner hearth is formed with drying zone, cracking zone, oxidation zone and reduction zone from top to bottom; The CO (carbon monoxide converter) gas filter mechanism of burner combustion is filtered and caused to escape pipe, bleed mechanism and CO (carbon monoxide converter) gas, one end of escape pipe is connected with vapourizing furnace body of heater, and communicate with outlet chamber, the other end of escape pipe is connected with bleed mechanism, bleed mechanism is connected with CO (carbon monoxide converter) gas filter mechanism pipeline, and the internal diameter of burner hearth is shrunk to not only the structure less but also less than the internal diameter of reduction zone than the internal diameter of cracking zone at the position corresponding to oxidation zone.
The deficiency of technique scheme is: updraft type fixed-bed gasification furnace in actual production, have two serious problems, one is that produced substance combustible gas tar content is high and temperature is low, this just causes having a large amount of tar to separate out in gas pipeline, and then obstruction pipeline, another problem is the easy scaling loss of fire grate.Down-draft type gasifying furnace also has two critical defects, and one makes that fuel gas temperature is higher, calorific value is lower, be unfavorable for follow-up equipment type selecting, and another problem is also fire grate scaling loss.
Therefore, how to provide a kind of temperature biomass gasification system adjustable, that tar content is controlled of exporting combustion gas to become the problem that industry need to solve.
Summary of the invention
For the shortcoming of prior art, the object of this invention is to provide a kind of biomass gasification system that temperature is adjustable, tar content is controlled of exporting combustion gas.
To achieve these goals, the invention provides a kind of biomass gasification system, it comprises multi-stage type fixed bed biomass gasification furnace, this multi-stage type fixed bed biomass gasification furnace comprises the body of heater of longitudinal setting, body of heater comprises the bucket-shaped tail ash section of the cone bottom being positioned at and is positioned at least two aerogenesis sections on described tail ash section, these at least two aerogenesis sections longitudinally arrange and are 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 all connects a combustion gas subtube, and many combustion gas subtubes are 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 blast inlet; The upper side or the top that are positioned at the aerogenesis section at 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 cylindric; The size of each aerogenesis section for example height, diameter, width can be identical can be not identical yet.
In the present invention, the number of aerogenesis section is more than two, is preferably 2-4.
In the present invention, the gas outlet of each aerogenesis section is preferably the upper end that is arranged at its sidepiece.
In the present invention, the combustion gas subtube that the gas outlet of each aerogenesis section connects and converge after gas header pipe road carry out interior insulation or insulation outward, to avoid heat to run off, the gas user that is beneficial to downstream is used.
In the present invention, the blast inlet of tail ash section sidepiece can connect intake stack, by gas blower, blows.
In the present invention, the gas content that each aerogenesis section produces is different, and gas tar oil content that upper sector body of heater produces is high, calorific value is higher, temperature is low, and the fuel gas temperature that lower section of body of heater produces is higher, and calorific value is lower.By the combustion gas that highly different multistage bodies of heater is produced, export and mix, can integrate the different physics-chem characteristics of each aerogenesis combustion gas that section produces, adjusting out comparatively ideal biological fuel gas, making the temperature of combustion gas and calorific value even.Owing to having adopted multistage aerogenesis technique, thereby gasification efficiency is higher.Can also improve in addition biomass gasifying furnace volume yield rate (or cross section factor of created gase), reduce vapourizing furnace equipment investment.While multi-stage type fixed bed biomass gasification furnace compact construction, volume vaporization rate is higher, and production maintenance is more convenient.
Another embodiment according to the present invention, all arranges the adjustable valve of flow on each combustion gas subtube.Can regulate by regulated valve the ratio of each section of combustion gas output, thereby make the biological fuel gas calorific value of institute's output stable, for example temperature is adjustable in certain scope for physical property, be convenient to adjust for later stage application apparatus.
Another embodiment according to the present invention, multi-stage type fixed bed biomass gasification furnace further comprises feeding unit and blanking pipeline; The top that is positioned at the aerogenesis section at top is provided with fuel inlet, and blanking pipeline inserts this fuel inlet; The top of blanking pipeline is stopped up, and the sidepiece of blanking pipeline is provided with opening for feed, and the end of feeding unit passes into this opening for feed; The sidepiece of blanking pipeline or top are also provided with circulating gas outlet, and this circulating gas outlet connects a fuel gas return-flow pipeline, and the sidepiece of tail ash section is provided with reflux inlet, and the other end of fuel gas return-flow pipeline is connected to the reflux inlet of tail ash section.
In this scheme, in order to reach better drying effect, the sidepiece opening for feed that can make material blanking tube road arranges lower than circulating gas outlet, and then makes the gas that rises in the whole process of landing all can contact oven from the biological particles of this throat-fed.
In this scheme, feeding unit can be various suitable feeding units, and for example it can be worm conveyor to realize continuously feeding, also can be cylinder valve (push-pull valve) to be interrupted charging.
In this scheme, on fuel gas return-flow pipeline, induced draft fan can be set, to guarantee the directed flow of gas in pipelines.
Common moisture 40%-50% is even higher for biological particles, and while carrying out gasifying biomass comparatively suitable water content for lower than 20%.By the sidepiece at blanking pipeline or top, circulating gas being set exports, the gas that is positioned at blanking pipeline can outwards be flowed out, and then the part hot gas in body of heater is entered through the lower ending opening of blanking pipeline, form circulation from bottom to top in the part hot gas process blanking pipeline in body of heater, the biological particles in blanking pipeline is dried.And moist hot gas process fuel gas return-flow pipeline and reflux inlet that through circulating gas, outlet is outwards flowed out, the high-temperature zone of getting back to again stove inner bottom part participates in gasification.Thereby this programme is by circulating gas outlet, fuel gas return-flow pipeline and reflux inlet being set, having realized from drying function; And do not need to adopt extra drying unit and oven dry means, and both realized making full use of of resource, avoided again contaminate environment, make vapourizing furnace very high for the water adaptability of biomass material simultaneously, broken through the strict demand of current conventional vapourizing furnace to moisture.
Another embodiment according to the present invention, feeding unit is multistage feeding unit, this multistage feeding unit at least comprises chopped-off head feeding unit, final stage feeding unit, and each grade of feeding unit includes the opening for feed that is positioned at front upper and the discharge port that is positioned at end; Chopped-off head feeding unit, final stage feeding unit are arranged up and down; The discharge port of chopped-off head feeding unit is directly connected and communicates with the opening for feed of final stage feeding unit, or is indirectly connected and communicates with the opening for feed of final stage feeding unit by one or more levels middle feeding device between chopped-off head feeding unit and final stage feeding unit; Described in chopped-off head feeding unit and each, the end of middle feeding device is equipped with middle the hopper of sealing, and the discharge port of chopped-off head feeding unit and each intermediate material e Foerderanlage is connected and communicates with the opening for feed of its next stage feeding unit by its centre hopper; The discharge port of final stage feeding unit is connected to the opening for feed of biomass gasifying furnace.
The opening for feed of chopped-off head feeding unit is the combined feed total feed mouth of whole multistage feeding unit, total discharge port that the discharge port of final stage feeding unit is whole multistage feeding unit.Due to biomass material light weight and volume little, easily scatter floating, cause dust pollution.In the utility model, diffusion when the middle hopper of sealing can effectively prevent that biomass material from entering next stage feeding unit from upper level feeding unit.The multistage feeding unit in stokehold is for being delivered to the biomass material in feed bin in biomass gasifying furnace.Biomass material in feed bin inputs in the opening for feed of chopped-off head feeding unit.The middle hopper of sealing also can be set, to prevent material diffusion between the opening for feed of the blanking port of feed bin and chopped-off head feeding unit.
By multistage feeding unit is set, and the middle hopper connection by sealing between feeding units at different levels communicates, while carrying biomass material in feeding unit, can effectively avoid the gas in biomass gasifying furnace to enter feed bin along feeding unit anti-channeling, and then the built on stilts arch camber of the feed bin that causes of the anti-cigarette of the equipment that prevents, blanking is smooth, personnel are poisoning and the accident such as feed bin blast.
Another embodiment according to the present invention, it further comprises cleaning apparatus, gas header pipe road passes into this cleaning apparatus, cleaning apparatus comprises ash output hole and gas outlet, gas outlet connects gas pipeline, on this gas pipeline, induced draft fan can be set, to guarantee the directed flow of gas in pipelines.By cleaning apparatus is set, the combustion gas obtaining is carried out to dust removal process, to avoid contaminate environment and dust clog downstream pipeline.Another embodiment according to the present invention, cleaning apparatus is monotubular cyclone dust collector or multi-cyclone cleaning apparatus or vitrified pipe dust removal by filtration device or moving-bed dust removal by filtration device.
Another embodiment according to the present invention, each aerogenesis section is provided with a plurality of gas outlets, and the plurality of gas outlet is positioned at sustained height.The gas outlet number of every section of body of heater can be consistent, also can be inconsistent.The gas outlet number of every section of body of heater is preferably 1-5.Be preferably, a plurality of gas outlets of every section of body of heater are uniformly distributed at a certain angle at sustained height.
Generally speaking, do not need to arrange effuser in body of heater, the gas outlet of every section of body of heater is furnace wall venting port.As required, another embodiment according to the present invention, is equipped with effuser in each aerogenesis section, and effuser comprises the house steward of longitudinal setting and is connected in a plurality of of described house steward and is in charge of, a plurality of a plurality of gas outlets of corresponding insertion respectively of being in charge of.
Another embodiment according to the present invention, fire grate is water-cooled grate, this water-cooled grate comprises the fire grate bar of many parallel arranged, every bar oven tier pole is the pipe fitting with cavity (for example metal tube or vitrified pipe) that thermally conductive material is made, and water-cooled grate comprises the drive-motor for driving fire grate bar to be rotated.By the fire grate bar of fire grate is rotated, can promote the lime-ash of piling up on fire grate to drop from the gap of fire grate, and then reach good deslagging effect.
Another embodiment according to the present invention, it can this fire grate bar be the blade that turning axle is rotated that every bar oven tier pole is all provided with, this blade is all positioned at the body of heater of vapourizing furnace.By drive-motor, drive fire grate bar to rotate, and then drive the blade rotary on fire grate bar, can realize better deslagging effect, effectively fire grate is carried out to initiatively scarfing cinder continuously, prevent that lime-ash from piling up on fire grate.Particularly, blade can be volution, multi-edge column-shaped or blade shape.
The lime-ash of discharging for slag notch and ash output hole, can adopt the multiple means of prior art to carry, and for example, can outwards carry by water-cooled auger, lime-ash is lowered the temperature when realizing conveying.Another embodiment according to the present invention, system of the present invention further comprises wet-type deslagging device, and this wet-type deslagging device comprises ash tube, worm conveyor, the tank being connected with slag notch and ash output hole, and the bottom of ash tube passes into worm conveyor; Worm conveyor is obliquely installed, and its end passes in tank downwards.The collected ash content of tail ash in vapourizing furnace and cleaning apparatus is transported in tank by ash tube, worm conveyor, thereby avoids flying dust contaminate environment.
Another embodiment according to the present invention, it further comprises bleeding device, bleeding device connects gas pipeline by pipeline, and comprises valve.
Another embodiment according to the present invention, the sidepiece of vapourizing furnace body of heater is provided with smoke backflow entrance, and this smoke backflow entrance connects smoke backflow pipeline, and the other end of this smoke backflow pipeline is connected to the flue gas output channel of downstream Yong Qi unit.By the CO of Jiang Yongqi unit
2reflux, increased CO
2generate reacting of CO with C, smoke backflow can, with the waste heat of reuse unit of heat, so just have been realized raising efficiency of carbon conversion and overall thermal efficiency surely simultaneously.While CO
2at high temperature can be oxidized tar, make it become gaseous hydrocarbon or CO, reduce tar content.By improving carbon conversion efficiency and utilizing with heating kiln furnace flue gas exhaust heat, greatly improved the efficiency of whole system.
Due to no longer rare CO in vapourizing furnace
2, the charcoal ash discharging out of the furnace can be sent into again in stove and be participated in reacting.Particularly, the end of the tail ash e Foerderanlage of vapourizing furnace tail ash e Foerderanlage and cleaning apparatus can lead to feed bin, then by feeding unit, is entered in vapourizing furnace and is reacted, thereby realize the circulation of charcoal ash.
Compared with prior art, the present invention possesses following beneficial effect:
In the present invention, the gas content that each section of body of heater produces is different, and gas tar oil content that upper sector body of heater produces is high, calorific value is higher, temperature is low, and the fuel gas temperature that lower section of body of heater produces is higher, and calorific value is lower.By the combustion gas that highly different multistage bodies of heater is produced, export and mix, can integrate the different physics-chem characteristics of each aerogenesis combustion gas that section produces, adjusting out comparatively ideal biological fuel gas, making the temperature of combustion gas and calorific value even.Owing to having adopted multistage aerogenesis technique, thereby gasification efficiency is higher.Can also improve in addition biomass gasifying furnace volume yield rate (or cross section factor of created gase), reduce vapourizing furnace equipment investment.While multi-stage type fixed bed biomass gasification furnace compact construction, volume vaporization rate is higher, and production maintenance is more convenient.In addition, the present invention can extend the scaling loss cycle of fire grate, reaches industrialization degree.
Below in conjunction with accompanying drawing, the present invention is described in further detail.
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 multi-stage type fixed bed biomass gasification furnace in embodiment 1;
Fig. 3 is the structural representation of the two-stage feeding unit in embodiment 3;
Fig. 4 is the structural representation of the fire grate in embodiment 4.
Embodiment
Embodiment 1
As Figure 1-Figure 2, the biomass gasification system of the present embodiment, comprises multi-stage type fixed bed biomass gasification furnace 1, cleaning apparatus (for example monotubular cyclone dust collector 2), bleeding device 3, wet-type deslagging device 4.
Wherein, multi-stage type fixed bed biomass gasification furnace 1 comprises that feeding unit 111(is as worm conveyor), blanking pipeline 11, body of heater.In body of heater, build flame-proof thermal insulation material by laying bricks or stones, comprise the first aerogenesis section 12, the second aerogenesis section 13, tail ash section 14.The top of the first aerogenesis section 12 is provided with fuel inlet.
Blanking pipeline 11 inserts the fuel inlet on the first aerogenesis section 12 tops.The top of blanking pipeline 11 is stopped up, and the sidepiece of blanking pipeline 11 is provided with opening for feed, and the end of feeding unit 111 passes into this opening for feed; The sidepiece of blanking pipeline 11 is also provided with circulating gas outlet, and this circulating gas outlet connects a fuel gas return-flow pipeline 112, and fuel gas return-flow pipeline 112 is provided with induced draft fan 113, and the other end of fuel gas return-flow pipeline 112 is connected to the reflux inlet 141 of tail ash section 14.
The first aerogenesis section 12 and the second aerogenesis section 13 are cylindric, are positioned on tail ash section 14 longitudinally setting and end to end.Between tail ash section the 14 and second aerogenesis section 13, be provided with fire grate 15.The sidepiece upper end of the first aerogenesis section 12 is provided with three gas outlet 121(furnace wall venting ports), these three gas outlets 121 are positioned at sustained height, and the angle between adjacent gas outlet is 120 °, and each gas outlet 121 all connects a combustion gas subtube 122.The sidepiece upper end of the second aerogenesis section 13 is provided with four gas outlet 131(furnace wall venting ports), these four gas outlets 131 are positioned at sustained height, and the angle between adjacent gas outlet is 90 °, and each gas outlet 131 all connects a combustion gas subtube 132.The adjustable valve of flow is all set on every combustion gas subtube.Many combustion gas subtube is connected to a gas header pipe road 5.
Gas header pipe road 5 passes into cleaning apparatus 2, and cleaning apparatus 2 comprises ash output hole 22 and gas outlet 21, and gas outlet 21 connects gas pipeline 6, and this gas pipeline 6 is provided with induced draft fan 61.
Wet-type deslagging device 4, comprises the ash tube 411 being connected with the slag notch 142 of tail ash section 14 and the ash tube 421 being connected with the ash output hole 22 of cleaning apparatus 2, worm conveyor 412, worm conveyor 422, tank 43.The bottom of ash tube 411 passes into worm conveyor 412; The bottom of ash tube 421 passes into worm conveyor 422; Worm conveyor 412 and worm conveyor 422 are all obliquely installed, and the end of the two all passes into downwards in tank 43.
Bleeding device 3 connects gas pipeline 6 by pipeline, and it has valve.
Embodiment 2
The difference of the present embodiment and embodiment 1 is: (1) also comprises the 3rd aerogenesis section, and the 3rd aerogenesis section is 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 in each aerogenesis section, gas outlet is evenly arranged at sustained height, and the angle between adjacent gas outlet is 90 °; (4) in each aerogenesis section, be equipped with effuser, effuser comprises the house steward of longitudinal setting and is connected in four of house steward and be in charge of, and is in charge of for four and correspondingly respectively inserts four gas outlets.
Embodiment 3
As shown in Figure 3, the difference of the present embodiment and embodiment 1 is: feeding unit is two-stage feeding unit 7, and it comprises chopped-off head feeding unit 701, middle hopper 702, final stage feeding unit 703.The open-end auger e Foerderanlage that chopped-off head feeding unit 701 is adjustable speed.It comprises the opening for feed that is positioned at front upper and the discharge port that is positioned at end.The blanking port of feed bin is connected and communicates with the opening for feed of chopped-off head feeding unit 701 front upper.The discharge port of chopped-off head feeding unit 701 ends is angle upwards, and this angle is provided with gland 704.The axis angulation of angle place plane and open-end auger e Foerderanlage is 45 °.Gland 704 has automatic reset mechanism (for example spring 705).In addition, one section of blade before chopped-off head feeding unit 701 discharge ports removes.The discharge port of chopped-off head feeding unit 701 is with respect to the horizontal plane inclined upwardly 10 °.The middle hopper 702 of sealing is arranged at the end of chopped-off head feeding unit 701.In middle hopper 702, be provided with two level gages, one of them is low level level gage 706, and another is high-order level gage 707.Final stage feeding unit 703 is open-end auger e Foerderanlage, and it comprises the opening for feed that is positioned at front upper and the discharge port that is positioned at end.Its discharge port is with respect to the horizontal plane inclined upwardly 15 °, and its discharge port is connected to the material inlet of biomass gasifying furnace 1.Chopped-off head feeding unit 201, final stage feeding unit 203 are arranged up and down; The discharge port of chopped-off head feeding unit 201 is directly connected and communicates by middle hopper 202 with the opening for feed of final stage feeding unit 203.
Embodiment 4
As shown in Figure 4, the difference of the present embodiment and embodiment 1 is: fire grate is water-cooled grate 8, and it comprises the fire grate bar 802 of the drive-motor 801 of adjustable speed, many parallel arranged.Drive-motor 801 is for driving every bar oven tier pole 802 to be rotated.Every bar oven tier pole 802 is the metal tube with cavity, and the two ends of every bar oven tier pole 802 are all positioned at outside the body of heater 1 of vapourizing furnace, and the two ends of every bar oven tier pole 802 are equipped with water-cooling swivel joint.Every bar oven tier pole 802 is all provided with spiral vane 803, and spiral vane 803 can this fire grate bar be that turning axle is rotated, and spiral vane 803 is all positioned at the body of heater of vapourizing furnace.
Although the present invention discloses as above with preferred embodiment, not in order to limit scope of the invention process.Any those of ordinary skill in the art, within not departing from invention scope of the present invention, when doing a little improvement, every equal improvement of doing according to the present invention, should be scope of the present invention and contains.
Claims (10)
1. a biomass gasification system, it comprises multi-stage type fixed bed biomass gasification furnace, described multi-stage type fixed bed biomass gasification furnace comprises the body of heater of longitudinal setting, described body of heater comprises the bucket-shaped tail ash section of the cone bottom being positioned at and is positioned at least two tubular aerogenesis sections on described tail ash section, described at least two aerogenesis sections longitudinally arrange and are end to end, described tail ash section and be provided with fire grate between the aerogenesis section of bottom; Described in each, the sidepiece of aerogenesis section is equipped with gas outlet; Each gas outlet all connects a combustion gas subtube, and many described combustion gas subtubes are connected to a gas header pipe road; The bottom of described tail ash section is provided with slag notch, and the sidepiece of described tail ash section is provided with blast inlet; The upper side or the top that are positioned at the described aerogenesis section at top are provided with fuel inlet.
2. biomass gasification system as claimed in claim 1, wherein, all arranges the adjustable valve of flow on combustion gas subtube described in each.
3. biomass gasification system as claimed in claim 1, wherein, described multi-stage type fixed bed biomass gasification furnace further comprises feeding unit and blanking pipeline; The top that is positioned at the described aerogenesis section at top is provided with fuel inlet, and described blanking pipeline inserts this fuel inlet; The top closure of described blanking pipeline, the sidepiece of blanking pipeline is provided with opening for feed, and the end of described feeding unit passes into this opening for feed; The sidepiece of described blanking pipeline or top are also provided with circulating gas outlet, and this circulating gas outlet connects a fuel gas return-flow pipeline, and the sidepiece of described tail ash section is provided with reflux inlet, and the other end of described fuel gas return-flow pipeline is connected to the reflux inlet of described tail ash section.
4. biomass gasification system as claimed in claim 3, wherein, described feeding unit is multistage feeding unit, described multistage feeding unit at least comprises chopped-off head feeding unit, final stage feeding unit, and each grade of feeding unit includes the opening for feed that is positioned at front upper and the discharge port that is positioned at end;
Described chopped-off head feeding unit, final stage feeding unit are arranged up and down; The discharge port of described chopped-off head feeding unit is directly connected and communicates with the opening for feed of described final stage feeding unit, or is indirectly connected and communicates with the opening for feed of described final stage feeding unit by one or more levels middle feeding device between described chopped-off head feeding unit and final stage feeding unit;
Described in described chopped-off head feeding unit and each, the end of middle feeding device is equipped with middle the hopper of sealing, and the discharge port of described chopped-off head feeding unit and intermediate material e Foerderanlage described in each is connected and communicates with the opening for feed of its next stage feeding unit by its centre hopper;
The discharge port of described final stage feeding unit is connected to the opening for feed of described biomass gasifying furnace.
5. biomass gasification system as claimed in claim 1, wherein, described in each, aerogenesis section is provided with a plurality of gas outlets, and the plurality of gas outlet is positioned at sustained height.
6. biomass gasification system as claimed in claim 5, wherein, described in each, in aerogenesis section, be equipped with effuser, described effuser comprises the house steward of longitudinal setting and is connected in a plurality of of described house steward and is in charge of, described a plurality of a plurality of gas outlets of corresponding insertion respectively of being in charge of.
7. biomass gasification system as claimed in claim 1, wherein, described fire grate is water-cooled grate, described water-cooled grate comprises the fire grate bar of many parallel arranged, every described fire grate bar is the pipe fitting with cavity that thermally conductive material is made, and described water-cooled grate comprises the drive-motor for driving described fire grate bar to be rotated.
8. biomass gasification system as claimed in claim 7, wherein, it can this fire grate bar be the blade that turning axle is rotated that every described fire grate bar is all provided with, described blade is all positioned at the body of heater of described vapourizing furnace.
9. biomass gasification system as claimed in claim 1, it further comprises wet-type deslagging device, and described wet-type deslagging device comprises ash tube, worm conveyor, the tank being connected with described slag notch, and the bottom of described ash tube passes into described worm conveyor; Described worm conveyor is obliquely installed, and its end passes into downwards in described tank.
10. biomass gasification system as claimed in claim 1, wherein, the sidepiece of described vapourizing furnace body of heater is provided with smoke backflow entrance, and this smoke backflow entrance connects smoke backflow pipeline, and the other end of this smoke backflow pipeline is connected to the flue gas output channel of downstream Yong Qi unit.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105062565A (en) * | 2015-07-30 | 2015-11-18 | 东南大学 | Biomass fixed bed oxygen-rich gasification furnace |
| 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 |
| CN108913210A (en) * | 2018-08-29 | 2018-11-30 | 云南煤化集团工程技术有限公司 | A kind of fixed bed slag gasification furnace cloth temperature regulating device |
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