CN202989068U - Boiling type biomass gasification system - Google Patents
Boiling type biomass gasification system Download PDFInfo
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- CN202989068U CN202989068U CN201220486237.1U CN201220486237U CN202989068U CN 202989068 U CN202989068 U CN 202989068U CN 201220486237 U CN201220486237 U CN 201220486237U CN 202989068 U CN202989068 U CN 202989068U
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Abstract
The utility model provides a boiling type biomass gasification system which comprises a feeding device and a boiling type biomass gasifier. The boiling type biomass gasifier comprises a reaction section and a tail ash section, wherein the reaction section is arranged above the tail ash section, a fire grate is arranged between the reaction section and the tail ash section, the reaction section is a vertically arranged tube body, a feeding port is arranged on the side portion of the reaction section and located below the middle of the reaction section, the top end of the reaction section is sealed, a fuel gas outlet is arranged on the upper portion of the side face of the reaction section, the tail ash section is in the shape of a cone funnel and located below the reaction section, a deslagging port is arranged at the bottom of the tail ash section, and an air inlet is arranged on the side portion of the tail ash section and connected with an air inlet pipeline. Compared with a fluidized bed, the air flow speed in the boiling type biomass gasifier is appropriate, few solid substances are carried by fuel gas, and therefore the fuel gas is enabled to have low ash content; and due to the fact that gasifying media are led into the boiling type biomass gasifier through the air inlet which is located on the side portion of the tail ash section, deslagging can be carried out more smoothly. Compared with a fixed bed, the pyrolysis time of fuel in the boiling type biomass gasifier is quite short, and therefore the content of tar in the fuel gas is quite low, and the situation that the tar is separated out to block the pipeline is prevented.
Description
Technical field
The utility model relates to a kind of boiling type biomass gasification system.
Background technology
Biomass gasifying furnace mainly contains both direction at present, and one is fluidized-bed gasification furnace, and two is fixed-bed gasification furnace.Fluidized-bed gasification furnace is that biomass fuel is completed gasification with fluidized state in stove; Its main characteristic is to require into the amount of stove biomass material lessly, is convenient to fluidisation.Fixed-bed gasification furnace is that biomass exist with the state of piling up in stove, completes gasification in the mode of grate firing; Be characterized in requiring the amount into the stove biomass material larger.
For example, Chinese patent application 201120162620 discloses a kind of high-speed biomass circulating fluidized bed gasifier, it comprises riser tube, cloth wind system, cyclonic separator and material returning device, riser tube offers charging opening, the cloth wind system is located at bottom riser tube, the cloth wind system comprises air compartment, air distribution plate and blast cap, air distribution plate is arranged at the top in air compartment, blast cap is arranged on air distribution plate, the top outlet of riser tube is connected with cyclonic separator, be connected import and connect in the bottom of cyclonic separator with material returning device, the outlet of material returning device is connected with the riser tube bottom.
Chinese patent 201120058801 discloses a kind of biomass gasification system.This system is made of supply air system, screw feeder, fluidized-bed gasification furnace, cyclonic separator, coke tar reforming device, purification system and accumulator unit.Be used for adding gas or solid catalyst at least 3 injection ports of fluidized-bed gasification furnace wall one side setting, at least 2 injection ports be set on blind plate be used for adding liquid catalyst.Biomass are through after gasifying, the biomass of not reacted are deviate from by the separation of cyclonic separator, played the effect of rough purification pyrolysis gas, pyrolysis gas is converted into most of tar permanent gases and further sloughs the materials such as a small amount of macromolecular tar that are not converted by purification system through the coke tar reforming device, obtains pure pyrolysis gas and can deliver to accumulator unit or directly deliver to the gas user.
Chinese patent 201120558492 discloses a kind of biomass fixed-bed Poly-generation vapourizing furnace, and it comprises body of heater and fire grate, and body of heater inside arranges current equalizer, and current equalizer is divided into upper and lower two portions with body of heater inside, and top is reaction chamber, and the bottom is the catalytic pyrolysis chamber; Fire grate is truncated cone-shaped, is arranged in the catalytic pyrolysis chamber and is connected with the reaction chamber bottom; The body of heater top also is provided with air intlet, and bottom of furnace body is provided with carbon outleting port, and lower portion of furnace body arranges gas outlet, and gas outlet is communicated with the catalytic pyrolysis chamber.
Chinese patent 201120482192 discloses the fixed bed biomass gasification equipment that a kind of tar classification is collected, it comprises vapourizing furnace, top or bottom inlet at vapourizing furnace arranges gasification wind inlet tube, outlet arranges the first airway, be connected with the high temperature filtration fly-ash separator through the first airway, the high temperature filtration fly-ash separator is connected with a plurality of tar wells through the second airway, be respectively equipped with water cooler in each tar well, tar well has collection Jiao Chi, and the bottom of collection Jiao Chi is provided with coke discharging tube.Different according to the section of heating up in a steamer of the coal-tar middle oil composition of combustion gas, utilize type of cooling classification to collect tar in combustion gas, then according to the difference of the composition of collecting, effectively utilize.
In technique scheme, the subject matter of fluidized-bed gasification furnace is that the combustion gas ash content is high, and vapourizing furnace body ash discharge function is very poor; The subject matter of fixed-bed gasification furnace is that gas tar oil content is too high, phenomenon easily occurs burning partially, burns.
Therefore, how to provide a kind of combustion gas ash content low, possess the ash discharge function and the low biomass gasification system of gas tar oil content becomes the problem that industry need to solve.
Summary of the invention
For the shortcoming of prior art, the purpose of this utility model be to provide a kind of combustion gas ash content low, possess ash discharge function and the low biomass gasification system of gas tar oil content.
To achieve these goals, the utility model provides a kind of boiling type biomass gasification system, and it comprises feeding unit, boiling type biomass gasifying furnace; The boiling type biomass gasifying furnace comprises conversion zone and tail ash section; Conversion zone and tail ash section are setting up and down, are provided with fire grate between conversion zone and tail ash section; Wherein, conversion zone is the cylindrical shell that vertically arranges, and the sidepiece of conversion zone is provided with opening for feed, and this opening for feed is positioned at below the middle part of conversion zone; The end sealing of conversion zone, the top of its side is provided with gas outlet; Tail ash section is bucket-shaped for cone, and it is positioned at the below of conversion zone; The bottom of tail ash section is provided with slag notch; The sidepiece of tail ash section is provided with blast inlet, and this blast inlet connects intake stack.
Boiling type biomass gasifying furnace of the present utility model is structurally used for reference and in conjunction with the characteristics of fixed bed biomass gasification furnace and biomass fluid bed gasification furnace.
The charging aspect because the material height in fixed-bed gasification furnace is higher, reaches 80% of conversion zone height usually, and it must be from top fed; And the biomass fuel in fluidized-bed gasification furnace carries out gasification reaction with suspended state or fluidized state, in stove, it doesn't matter, and material is high, thereby its opening for feed can be on the low side, be located at below the middle part of conversion zone sidepiece, thinner when biomass material, powder is many, opening for feed can hang down, and when biomass material is thicker, opening for feed can be high; Material Gao Buhui in boiling type biomass gasifying furnace of the present utility model is very high, be generally below 25% of conversion zone height, and as long as the position of its opening for feed is high a little more than material, its opening for feed is used for reference the opening for feed of fluidized-bed, be arranged at the sidepiece of conversion zone, be preferably the position apart from conversion zone bottom 1/4-1/2.
Ash discharge and air inlet aspect, owing to being provided with air port and blast cap under the fire grate of fluidized-bed, ash discharge and air inlet are easy to interact, be to be stopped by air port and blast cap in the process that falls of lime-ash, lime-ash easily stops up the air port simultaneously, cause the difficulty of blowing in stove, and then affect the process of gasification reaction in stove.And the blast inlet of fixed bed is usually located at the side of tail ash section, can not stop ash discharge and be stopped up by lime-ash.Ash discharge and the intake method of fixed bed used for reference in the ash discharge of boiling type biomass gasifying furnace of the present utility model and air inlet, inlet mouth is arranged at the side of tail ash section.
The barrel aspect, fixed-bed gasification furnace is generally straight tube, and fluidized-bed gasification furnace arranges the hydraucone of opening upwards usually above next-door neighbour's tail ash section, its objective is that the variation by sectional area changes wind speed, (be that the less wind speed of sectional area is larger, the larger wind speed of sectional area is less).As required, boiling type biomass gasifying furnace of the present utility model can be provided for changing the closing in (hydraucone) of wind speed, also can not arrange.
Correspondingly, boiling type biomass gasifying furnace of the present utility model is also used for reference on technique and in conjunction with the characteristics of fixed bed biomass gasification technique and biomass fluid bed gasifying process.Its gasification comprises and opens furnace igniting, grate firing state gasification, boiling state gasification, puts out stove.Wherein the mode with fixed-bed gasification furnace opens furnace igniting, puts out stove in the mode that fluidized-bed gasification furnace " closes material and is not related to wind ".Thereby can say, boiling type biomass gasifying furnace of the present utility model is on technique, and the first half section is similar to the technique of fixed-bed gasification furnace, the technique of approximate fluidized-bed gasification furnace of second half section.
In the utility model, boiling state refers to that biomass raw material particle is at the state of vapourizing furnace inner suspension.
In the utility model, feeding unit is preferably and comprises closed feed pipe, and is dangerous to prevent that gas leakage from producing.
In the utility model, biomass material enters from the sidepiece of vapourizing furnace conversion zone, falls on fire grate, carries out grate firing on fire grate; After waiting to be burned to a certain degree, quality lightens, and under the air blast effect of bottom air inlet air that mouth advances, floats to the top of conversion zone, completes gasification with boiling state; The combustion gas that generates in gasification is discharged by the gas outlet that is positioned at top, conversion zone side.
In the utility model, pass into gasifying medium by blast inlet.Gasifying medium can air, it can be also the gasifying medium that has added other composition in air, or each composition in air has been carried out the gasifying medium of regulating, for example, according to different biomass materials, occasion and purpose, can suitably increase or reduce the content of oxygen, nitrogen, water vapour and carbonic acid gas, to control the composition of transformation efficiency, productive rate and product such as combustion gas.
In the utility model, the top of conversion zone can arrange water seal arrangement.
In the utility model, fire grate can be selected various fire grate of the prior art, in order to strengthen the performance of hearth deslagging, is preferably such as hand fire grate, reciprocal grate, traveling-grate stoker etc. of movable fire grate, or the rotary tower type fire grate structure, thereby ensure the vapourizing furnace continuous and steady operation.
Structure composition of the present utility model the characteristics of fixed bed and fluidized-bed, the similar fluidized-bed of its charging, the similar fixed bed of its deslagging and air inlet; In other words, the similar fixed bed of its lower semisection, the similar fluidized-bed of its upper semisection; The first half section of biomass material reaction process is the reaction process of fixed bed, and the second half section is the reaction process of fluidized-bed, namely seethes with excitement after first grate firing, reduces after initial oxidation.It has structurally overcome the shortcoming of fluidized-bed and fixed-bed gasification furnace.For fluidized-bed, because gas velocity in vapourizing furnace of the present utility model is suitable, the solid matter that combustion gas is carried is few, and then it is few to make combustion gas contain ash content; Owing to passing into gasifying medium by blast inlet, and blast inlet is positioned at the sidepiece of tail ash section.At furnace bottom, blast cap or air distribution plate are set with respect to fluidized-bed, can carry out deslagging more unobstructedly, and needn't worry that slag stops up blast cap, air distribution plate or the blast inlet that is positioned at furnace bottom.For fixed bed, because the vapourizing furnace fuel thermal decomposition time of the present utility model is shorter, so the coal-tar middle oil content of combustion gas is lower, and then prevent that tar from separating out, block pipeline.Therefore, the utility model can satisfy the industrialized application needs of biomass gasification technology well.
According to another embodiment of the utility model, it further comprises cleaning apparatus, and this cleaning apparatus comprises gas inlet, pneumatic outlet and slag notch, is connected gas outlet and connects by pipeline in the gas inlet with the boiling type biomass gasifying furnace.Cleaning apparatus can be the various fly-ash separators of prior art, and it is preferred but be not limited to single tube tornado dust collector, multitube ceramic cyclone dustproof device, filler filter collector etc.By cleaning apparatus is set, effectively purifying gas, prevent the pollution of the environment.
According to another embodiment of the utility model, it further comprises the thermoswitch for reducing fuel gas temperature, and this thermoswitch comprises fuel gas inlet, gas outlet, gas inlet, airout; Fuel gas inlet connection gas inlet pipe road, gas outlet connects the combustion gas output channel, and gas inlet connects the air input channel, and airout connects the air output channel.The thermoswitch here is essentially interchanger, and it is preferred but be not limited to tube and shell heat exchanger, heat-pipe heat exchanger etc.; Its temperature with combustion gas adds hot air temperature, so that the temperature of gas outlet reaches design temperature or specified temperature, simultaneously the gasifying medium that is about to pass into vapourizing furnace heated, and taking full advantage of heat, and then fuel saving.
Because the fuel gas temperature of the gas outlet of thermoswitch is certain, be design temperature or specified temperature.In order to reach this target, may need gas blower to send into a certain amount of air.Greater than required air quantity, the fuel gas temperature of gas outlet may be lower than desired temperature when the air capacity of sending into.According to another embodiment of the utility model, be provided with between air input channel and air output channel for the connecting pipe that is communicated with both, this connecting pipe is provided with valve.Greater than required air quantity, open the valve on connecting pipe when the air capacity of sending into, reduce the air capacity that participates in heat exchange.Be equipped with on airline after heat exchange and diffuse valve,, can diffuse during greater than the required amount of vaporization of vapourizing furnace when the warm air after heat exchange.According to another embodiment of the utility model, the sidepiece of conversion zone is provided with the smoke backflow entrance, and this smoke backflow entrance connects the smoke backflow pipeline, and the other end of this smoke backflow pipeline is connected to the flue gas output channel of downstream user.By pipeline and high-temperature flue gas induced draft fan, the flue gas of biological fuel gas after the user locates to burn drawn back vapourizing furnace and participate in gasification, realize flue gas CO
2Circulation, whole like this vapourizing furnace has reduced the usage quantity of oxygen, has utilized the waste heat of flue gas, has improved carbon conversion efficiency, has reduced simultaneously tar content, thereby has improved the whole efficiency of vapourizing furnace.
According to another embodiment of the utility model, feeding unit is multistage feeding unit, this multistage feeding unit comprises chopped-off head feeding unit, final stage feeding unit at least, and each grade 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 directly is connected with the opening for feed of final stage feeding unit and communicates, and perhaps communicates with the opening for feed indirect joint of final stage feeding unit by one or more levels middle feeding device between chopped-off head feeding unit and final stage feeding unit; The end of chopped-off head feeding unit and each described middle feeding device is equipped with middle the hopper of sealing, the chopped-off head feeding unit with is connected the discharge port of intermediate material e Foerderanlage and is connected with the opening for feed of its next stage feeding unit by its centre hopper and communicates; 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, and the discharge port of final stage feeding unit is total discharge port of whole multistage feeding unit.Due to the biomass material light weight and volume little, easily scatter floating, cause dust pollution.Diffusion when the middle hopper of sealing can prevent effectively that biomass material from entering the next stage feeding unit from the upper level feeding unit.The multistage feeding unit in stokehold is used for the biomass material in feed bin is delivered 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 the 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, when carrying biomass material in feeding unit, can effectively avoid the gas in biomass gasifying furnace to enter feed bin along the 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.
According to another embodiment of the utility model, multistage feeding unit is two-stage, three grades or level Four.
According to another embodiment of the utility model, it further comprises the tail ash e Foerderanlage of vapourizing furnace tail ash e Foerderanlage and cleaning apparatus, the end of the tail ash e Foerderanlage of vapourizing furnace tail ash e Foerderanlage and cleaning apparatus all leads to feed bin, then enter in vapourizing furnace by feeding unit and react, thereby realize the circulation of charcoal ash.
According to another embodiment of the utility model, 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 that is rotated for driving the fire grate bar.By making the fire grate bar rotation of fire grate, can promote the lime-ash of piling up on fire grate to drop from the gap of fire grate, and then reach deslagging effect preferably.
According to another embodiment of the utility model, every bar oven tier pole all is equipped with blade, and this blade all is positioned at the body of heater of vapourizing furnace.Drive fire grate bar rotation by drive-motor, and then drive the blade rotary on the fire grate bar, can realize better deslagging effect, effectively fire grate is carried out 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.
Lime-ash for slag notch and ash output hole discharge can adopt the multiple means of prior art to carry, and for example, can outwards carry by the water-cooled auger, when carrying with realization, lime-ash is lowered the temperature.According to another embodiment of the utility model, system of the present utility model further comprises wet-type deslagging device, this wet-type deslagging device comprises ash tube, worm conveyor, the tank that is 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.Tail ash and the collected ash content of cleaning apparatus in vapourizing furnace are transported in tank by ash tube, worm conveyor, thereby avoid the flying dust contaminate environment.
According to another embodiment of the utility model, the gas pipeline between cleaning apparatus and temperature control equipment is provided with water seal type valve system, and water seal arrangement is connected with gas pipeline and diffuses the pipeline of use.
According to another embodiment of the utility model, be equipped with bleeding device on combustion gas output channel and air output channel.
Compared with prior art, the utility model possesses following beneficial effect:
Structure composition of the present utility model the characteristics of fixed bed and fluidized-bed, the similar fluidized-bed of its charging, the similar fixed bed of its deslagging and air inlet; In other words, the similar fixed bed of its lower semisection, the similar fluidized-bed of its upper semisection; The first half section of biomass material reaction process is the reaction process of fixed bed, and the second half section is the reaction process of fluidized-bed, namely seethes with excitement after first grate firing, reduces after initial oxidation.It has structurally overcome the shortcoming of fluidized-bed and fixed-bed gasification furnace.For fluidized-bed, because gas velocity in vapourizing furnace of the present utility model is suitable, the solid matter that combustion gas is carried is few, and then it is few to make combustion gas contain ash content; Owing to passing into gasifying medium by blast inlet, and blast inlet is positioned at the sidepiece of tail ash section, at furnace bottom, blast cap or air distribution plate are set with respect to fluidized-bed, can carry out deslagging more unobstructedly, and needn't worry that slag stops up blast cap, air distribution plate or the blast inlet that is positioned at furnace bottom.For fixed bed, because the vapourizing furnace fuel thermal decomposition time of the present utility model is shorter, so the coal-tar middle oil content of combustion gas is lower, and then prevent that tar from separating out, block pipeline.Therefore, the utility model can satisfy the industrialized application needs of biomass gasification technology well.
The utility model is described in further detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the structural representation of the boiling type biomass gasification system of embodiment 1;
Fig. 2 is the structural representation of the fire grate in embodiment 3.
Embodiment
As shown in Figure 1, the boiling type biomass gasification system of the present embodiment comprises feed bin, multistage (two-stage) feeding unit 1, boiling type biomass gasifying furnace 2, cleaning apparatus (for example the monotubular cyclone dust collector 3), temperature control equipment 4, gas user 5.
Wherein, two-stage feeding unit 1 comprises chopped-off head feeding unit 101, middle hopper 102, final stage feeding unit 103.Chopped-off head feeding unit 101 is the open-end auger e Foerderanlage of 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 with the opening for feed of chopped-off head feeding unit 101 front upper and communicates.The discharge port of chopped-off head feeding unit 101 ends is angle upwards, and this angle is provided with gland.The axis angulation of plane, angle place and open-end auger e Foerderanlage is 45 °.Gland has automatic reset mechanism.In addition, one section blade before chopped-off head feeding unit 101 discharge ports removes.The discharge port of chopped-off head feeding unit 101 with respect to the horizontal plane is inclined upwardly 10 °.The middle hopper 102 of sealing is arranged at the end of chopped-off head feeding unit 101.Be provided with two level gages in middle hopper 102, one of them is the low level level gage, and another is high-order level gage.Final stage feeding unit 103 is the 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 with respect to the horizontal plane is inclined upwardly 15 °, and its discharge port is connected to the opening for feed of biomass gasifying furnace 2.Chopped-off head feeding unit 101, final stage feeding unit 103 are arranged up and down; The discharge port of chopped-off head feeding unit 101 directly is connected by middle hopper 102 with the opening for feed of final stage feeding unit 103 and communicates.
Boiling type biomass gasifying furnace 2 comprises conversion zone 21 and tail ash section 22; Conversion zone 21 and tail ash section 22 are setting up and down, are provided with fire grate between conversion zone 21 and tail ash section 22.Wherein, conversion zone 21 is the cylindrical shell that vertically arranges, its end sealing.The sidepiece of conversion zone 21 is provided with opening for feed 211, smoke backflow entrance 212, gas outlet 213.Opening for feed 211 is positioned at below the middle part of conversion zone 21; Gas outlet 213 is arranged at the top, side of conversion zone 21.Tail ash section 22 is bucket-shaped for cone, and it is positioned at the below of conversion zone 21; The bottom of tail ash section 22 is provided with slag notch 221; The sidepiece of tail ash section 22 is provided with blast inlet 222.Slag notch 221 is provided with tail ash e Foerderanlage, and the end of this tail ash e Foerderanlage leads to the feed bin (not shown).
Cleaning apparatus 3 comprises gas inlet 31, pneumatic outlet 32 and slag notch 33, and the gas outlet 213 of being connected with the boiling type biomass gasifying furnace in gas inlet 31 connects by pipeline.Cleaning apparatus 3 comprises ash bin 34, and this ash bin 34 is arranged at the below of slag notch 33.The bottom of ash bin 34 is provided with worm conveyor 35, and the other end of this worm conveyor 35 leads to the feed bin (not shown).
Thermoswitch 4 comprises fuel gas inlet, gas outlet, gas inlet, airout; Fuel gas inlet connection gas inlet pipe road 411, gas outlet connects combustion gas output channel 412, and this combustion gas output channel 412 is provided with induced draft fan, and its end leads to gas user 5.Gas inlet connects air input channel 421, and the end of air input channel 421 is provided with gas blower.Airout connects air output channel 422, and the other end of air output channel 422 is connected to the blast inlet 222 of boiling type biomass gasifying furnace 2.Be provided with between air input channel 421 and air output channel 422 for the connecting pipe 423 that is communicated with both, this connecting pipe is provided with valve.Air output channel 422 is provided with under meter.
Gas user 5 is provided with smoke backflow pipeline 51, is used for the flue gas after fuel gas buring is delivered to vapourizing furnace.This smoke backflow pipeline 51 is provided with induced draft fan, and its end is connected to the smoke backflow entrance 212 of boiling type biomass gasifying furnace 2.
In addition, the gas inlet pipe road 411 between cleaning apparatus 3 and temperature control equipment 4 is provided with water seal arrangement, and water seal arrangement is connected with the pipeline that diffuses use.
Be equipped with bleeding device on combustion gas output channel 412 and air output channel 422.
The difference of the present embodiment and embodiment 1 is: (1) does not have smoke backflow pipeline 51; (2) the tail ash of tail ash e Foerderanlage conveying is directly processed, and does not reclaim; (3) the tail ash of worm conveyor 35 conveyings is directly processed, and does not reclaim.
Embodiment 3
As shown in Figure 2, 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 used for driving every bar oven tier pole 802 and is rotated.Every bar oven tier pole 802 is the metal tube with cavity, and the two ends of every bar oven tier pole 802 all are positioned at outside the body of heater 2 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 all is equipped with spiral vane 803, and spiral vane 803 can this fire grate bar be that turning axle is rotated, and spiral vane 803 all is positioned at the body of heater of vapourizing furnace.
Although the utility model discloses as above with preferred embodiment, be not to limit the scope that the utility model is implemented.Any those of ordinary skill in the art, within not breaking away from invention scope of the present utility model, when doing a little improvement, namely every equal improvement of doing according to the utility model, should be scope of the present utility model and contain.
Claims (10)
1. boiling type biomass gasification system, it comprises feeding unit, boiling type biomass gasifying furnace; Described boiling type biomass gasifying furnace comprises conversion zone and tail ash section; Described conversion zone and tail ash section are setting up and down, are provided with fire grate between described conversion zone and tail ash section; It is characterized in that,
Conversion zone is the cylindrical shell that vertically arranges, and the sidepiece of described conversion zone is provided with opening for feed, and this opening for feed is positioned at below the middle part of described conversion zone; The end sealing of described conversion zone, the top of its side is provided with gas outlet;
Tail ash section is bucket-shaped for cone, and it is positioned at the below of described conversion zone; The bottom of described tail ash section is provided with slag notch; The sidepiece of described tail ash section is provided with blast inlet, and this blast inlet connects intake stack.
2. boiling type biomass gasification system as claimed in claim 1, it is characterized in that, further comprise cleaning apparatus, described cleaning apparatus comprises gas inlet, pneumatic outlet and slag notch, described gas inlet be connected the gas outlet of boiling type biomass gasifying furnace and connect by pipeline.
3. boiling type biomass gasification system as claimed in claim 2, is characterized in that, further comprises the thermoswitch for reducing fuel gas temperature, and described thermoswitch comprises fuel gas inlet, gas outlet, gas inlet, airout; Described fuel gas inlet connection gas inlet pipe road, described gas outlet connects the combustion gas output channel, and described gas inlet connects the air input channel, and described airout connects the air output channel.
4. boiling type biomass gasification system as claimed in claim 3, is characterized in that, is provided with between described air input channel and described air output channel for the connecting pipe that is communicated with both, and this connecting pipe is provided with valve.
5. boiling type biomass gasification system as claimed in claim 1, it is characterized in that, the sidepiece of described conversion zone is provided with the smoke backflow entrance, and this smoke backflow entrance connects the smoke backflow pipeline, and the other end of this smoke backflow pipeline is connected to the flue gas output channel of downstream user.
6. boiling type biomass gasification system as claimed in claim 1, is characterized in that, described feeding unit is multistage feeding unit; Described multistage feeding unit comprises chopped-off head feeding unit, final stage feeding unit at least, and each grade 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 directly is connected with the opening for feed of described final stage feeding unit and communicates, and perhaps communicates with the opening for feed indirect joint 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;
The end of described chopped-off head feeding unit and each described middle feeding device is equipped with middle the hopper of sealing, described chopped-off head feeding unit with is connected the discharge port of described intermediate material e Foerderanlage and is connected with the opening for feed of its next stage feeding unit by its centre hopper and communicates;
The discharge port of described final stage feeding unit is connected to the opening for feed of described biomass gasifying furnace.
7. boiling type biomass gasification system as claimed in claim 6, is characterized in that, described multistage feeding unit is two-stage, three grades or level Four.
8. boiling type biomass gasification system as claimed in claim 6, it is characterized in that, the tail ash e Foerderanlage that further comprises vapourizing furnace tail ash e Foerderanlage and cleaning apparatus, the end of the tail ash e Foerderanlage of described vapourizing furnace tail ash e Foerderanlage and cleaning apparatus all leads to feed bin.
9. boiling type biomass gasification system as claimed in claim 1, it is characterized in that, 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 that is rotated be used to driving described fire grate bar.
10. boiling type biomass gasification system as claimed in claim 9, is characterized in that, every described fire grate bar all is equipped with blade, and described blade all is positioned at the body of heater of described vapourizing furnace.
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| CN201220486237.1U CN202989068U (en) | 2012-09-20 | 2012-09-20 | Boiling type biomass gasification system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103666567A (en) * | 2012-09-20 | 2014-03-26 | 赵广健 | Boiling type biomass gasification system |
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2012
- 2012-09-20 CN CN201220486237.1U patent/CN202989068U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103666567A (en) * | 2012-09-20 | 2014-03-26 | 赵广健 | Boiling type biomass gasification system |
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