CN101974352B - Biomass combustible gas water-seal device and biomass gasification system using same - Google Patents
Biomass combustible gas water-seal device and biomass gasification system using same Download PDFInfo
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- CN101974352B CN101974352B CN 201010528029 CN201010528029A CN101974352B CN 101974352 B CN101974352 B CN 101974352B CN 201010528029 CN201010528029 CN 201010528029 CN 201010528029 A CN201010528029 A CN 201010528029A CN 101974352 B CN101974352 B CN 101974352B
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Abstract
The invention discloses a biomass combustible gas water-seal device. The device comprises a first water container, a shell, a first bell jar, a second water container, a pulling rod and a second bell jar, wherein a through hole is formed on the first water container; the shell is covered on the upper part of the first water container, and a plurality of drain holes are formed on the lower part of the first water container; a gas outlet is formed on the first water container, a through hole which is passed by the pulling rod is arranged on the top of the first water container; the outlet end of a gas pipeline is positioned in space enclosed by the first water container and the shell, and is higher than the water level in the first water container; the first bell jar is positioned in the shell and covered on the outlet end of the gas pipeline, and the bottom end of the first bell jar is positioned under the water level in the first water container; the second water container is positioned on the top of the shell, and a through hole is arranged at the bottom of the second water container; a pipeline is arranged at the position of the through hole; the through hole is coincided with the through hole on the top of the shell; the bottom end of the pulling rod is connected with the top of the first bell jar, and passes through the through hole on the top of the shell; the second bell jar is connected with the pulling rod, and is covered on the top end of the pipeline of the second water container; and the bottom of the second bell jar is positioned under the water level in the second water container. The biomass combustible gas water-seal device can preferably solve the problem that the biomass combustible gas easily causes explosion, leakage and the like due to unstable air pressure and unstable gas output, and is a most effective safety guarantee system for a biomass gasification system.
Description
Technical field
The present invention relates to a kind of biological mass combustable gas water seal arrangement, and the biomass gasification reaction system that uses this biological mass combustable gas water seal arrangement.
Background technology
The history in existing more than 100 year of gasifying biomass.Initial gasifying reactor results from 1883, and it is take charcoal as raw material, the gas driven oil engine after the gasification.During World War II, Germany has greatly developed the vehicle-mounted gasifier that is used for motor vehicles for civilian use, and has formed the complete skill with matching with automobile engine.Gasifying biomass at that time mainly adopts the fixed bed gasification reactor, and its state of the art has reached quite perfect degree.
Gasifying biomass refers to send in the vapourizing furnace after the biomass material processing treatment, carries out gasification cracking under the condition of anoxic, obtains inflammable gas, thereby sometimes also will obtain to output gas the gas product of high-quality through the row purifying treatment according to the application needs.
The gasifying biomass principle is under certain thermodynamic condition, effect by means of gasifying medium such as air, oxygen or water vapour etc., make superpolymer generation pyrolysis, oxidation, reduction, the reforming reaction of biomass, the further thermally splitting of the tar of pyrolysis association or catalytic cracking become the small molecules hydrocarbon polymer, obtain the inflammable gass such as CO, H2 and CH4.Gasifying biomass mainly comprises gasification reaction, synthetic gas catalytic shift and gas isolation of purified process (directly use without isolation of purified).Take air as example as gasifying medium, gasifying biomass chemical reaction general formula can be expressed as:
CH
1.4O
0.6+0.4O
2+1.5N
2＝0.7CO+0.3CO
2+0.6H
2+0.1H
2O+(1.5N
2)
Generally speaking, biomass are comprised of Mierocrystalline cellulose, hemicellulose, xylogen, inert ash etc., and oxygen level and fugitive constituent are high, and the reactivity of coke is strong, so biomass and coal facies ratio, has higher gasification reactivity, are more suitable for gasification.
From the angle of the vapourizing furnace that adopts, biomass gasification technology can be divided into two large classes, and a class is the fixed-bed gasification furnace technology, and a class is the fluidized-bed gasification furnace technology.Wherein, fixed-bed gasification furnace can be divided into again updraft type fixed-bed gasification furnace, downdraft fixed-bed gasification furnace, crossdraft fixed-bed gasification furnace and happy formula fixed-bed gasification furnace etc.; Fluidized-bed gasification furnace can be divided into fluidized-bed gasification furnace, double-fluidized-bed vapourizing furnace and circle fluidized-bed gasification furnace etc. again.
No matter adopt which kind of vapourizing furnace, its purpose all is to carry out biomass gasification reaction, and then produces combustion gas.These combustion gas are delivered to the downstream user place by gas pipeline.The present common valve that is used for gas pipeline or reveal easily combustion gas, and then cause the security incidents such as blast, personnel's poisoning; The resistance of perhaps opening or closing is large, and switch speed is slow, affects working efficiency.
Except the problems referred to above, also there are the following problems for present employed vapourizing furnace:
(1) the vapourizing furnace gasification efficiency is low.Biomass material can not be vaporized well, and capacity usage ratio is low, and energy dissipation is more serious, easily makes vapourizing furnace dust stratification and slagging scorification more;
(2) combustion gas thermal value is on the low side.Lower thermal value not only causes the gas storage cost to raise, and causes the each household gas consumption to raise, and has increased user's expenditure, has limited the enthusiasm of user's usefulness gas;
(3) foreign matter content is high.Tar and dust deposit are serious, and central gas supply system can not carry out the long-term safety operation.Not only affected the continuity of producing, and caused in the factory building and alter on the flame, pipeline forms negative pressure back draft;
(4) secondary pollution problem.Part biological matter gasification unit adopts the wet purification technology on the market, discharges so inevitably washed water coolant to the external world, causes containing in the water coolant multiple harmful substances, such as phenol, ammonia etc.They consist of harm to animal and plant growth and safety, thereby cause secondary pollution.
Summary of the invention
One of purpose of the present invention provides a kind of biological mass combustable gas water seal arrangement, reaches to prevent gas leakage, can switch fast again; Another object of the present invention provides a kind of biomass gasification reaction system that uses above-mentioned biological mass combustable gas water seal arrangement, to reach the Peril Incident while of avoiding combustion gas to cause, improve gasification efficiency and combustion gas thermal value, reduce the generation of the impurity such as tar and dust, reduce secondary pollution.
To achieve these goals, the invention provides a kind of biological mass combustable gas water seal arrangement for the biomass gasification reaction system, the gas pipeline that this biomass gasification reaction system comprises fluidized bed gasification reactor and is connected in fluidized bed gasification reactor; This water seal arrangement comprises:
The first water receptacle, its bottom has a through hole, and gas pipeline passes from this through hole, and the through hole of its bottom and the sealing of the joint portion of gas pipeline are to avoid gas leaking;
Shell, it covers in the first water receptacle top, and its underpart is equipped with a plurality of limbers; Which is provided with gas outlet, its top is provided with the through hole that passes for pull bar; The exit end of gas pipeline is positioned at the space of the first water receptacle and shell encirclement, and is higher than the water surface in the first water receptacle;
The first bell jar, it is positioned within the shell, covers on the exit end of gas pipeline, and its bottom is positioned at below the water surface of the first water receptacle;
The second water receptacle is positioned at the top of shell, and its bottom has a through hole, and this through hole is provided with pipeline, and this through hole overlaps with the through hole of cover top portion;
Pull bar, the pull bar bottom is connected in the top of the first bell jar, and passes from the through hole of cover top portion;
The second bell jar, it is connected in pull bar, and covers on the top of the second water receptacle pipeline, and its bottom is positioned at below the water surface of the second water receptacle.
When gasification reaction carries out, ceaselessly water filling in the first water receptacle.When not needing gas supply, pull bar falls, and drives the first bell jar and falls, and covers on the exit end of gas pipeline, and this moment, the bottom of the first bell jar was positioned at below the water surface, and the combustion gas in the gas pipeline is just lived by the water seal in the first bell jar and the first water receptacle; When the needs gas supply, the pull bar pull-up covers on the first bell jar of the exit end of gas pipeline, and combustion gas just can be passed through from the gas outlet on the shell.Water level in the second water receptacle is darker, and the second bell jar is longer simultaneously, no matter pull bar pull-up or fall, and the bottom of the second bell jar is positioned at below the water surface of the second water receptacle all the time.
The ash owing to can fall in the first water receptacle of long duration can stop up the limbers of outer casing underpart, and then makes the water in the first water receptacle enter gas pipeline.For fear of the generation of this situation, be provided for injecting the high-pressure water inlet that high pressure water purges and the high pressure water outlet that is used for blowdown in the first water receptacle lower sidewall.High pressure water injects from high-pressure water inlet, and the ash that falls in the first water receptacle is discharged from the high pressure water outlet, has realized the cleaning in the first water receptacle.
Water level in the first water receptacle is too high, and the water of being convenient to simultaneously in the first water receptacle is recycled, and is equipped with overflow weir in the first water receptacle side wall upper part.Based on same reason, also be equipped with overflow weir in the second water receptacle side wall upper part.
On the other hand, in order to realize goal of the invention of the present invention, the present invention also provides a kind of biomass gasification reaction system that uses above-mentioned biological mass combustable gas water seal arrangement.This biomass gasification reaction system can comprise:
Fluidized bed gasification reactor for the preparation of biological fuel gas;
The biomass material plenum system of reaction raw materials is provided for fluidized bed gasification reactor; And
Tripping device more than the two-stage that is arranged at outside the fluidized bed gasification reactor and the reaction product of fluidized bed gasification reactor is separated, the above tripping device of this two-stage comprises the first tripping device and the second tripping device at least;
The gasifying medium plenum system of gasifying medium is provided for fluidized bed gasification reactor; Wherein, the gas outlet of the second tripping device is provided with above-mentioned water-sealed valve
Preferably, in biomass gasification reaction of the present invention system, fluidized bed gasification reactor comprises the first opening for feed and the second opening for feed that is arranged at its central region, the gasifying medium entrance that is arranged at its bottom and waste outlet and the material outlet that is arranged at its upper area; Wherein, the first opening for feed of fluidized bed gasification reactor engages with the biomass material plenum system, and the gasifying medium entrance of fluidized bed gasification reactor engages with the gasifying medium plenum system; The first tripping device comprises the material inlet that is arranged at its upper area, the loop exit that is arranged at the material outlet of its central region and is arranged at its bottom; Wherein, the material inlet of the first tripping device engages with the material outlet of fluidized bed gasification reactor, and the loop exit of the first tripping device engages with the second opening for feed of fluidized bed gasification reactor by the first e Foerderanlage; And second tripping device comprise the gas outlet, the material inlet that is arranged at its upper area that are arranged at its top, be arranged at the loop exit of its bottom; Wherein, the material inlet of the second tripping device engages with the material outlet of the first tripping device, and the loop exit of the second tripping device engages with the second opening for feed of fluidized bed gasification reactor by the second e Foerderanlage and the first e Foerderanlage.
In biomass gasification reaction of the present invention system, biomass material such as granular biomass material react at fluidized bed gasification reactor and gasifying medium, the complicated serial reaction such as pyrolysis, oxidation, reduction, reformation occurs in the polymkeric substance of biomass such as Mierocrystalline cellulose etc., obtains CO, H
2And CH
4Deng combustion gas, wherein, the further thermally splitting of the tar of pyrolysis association or catalytic cracking become the small molecules hydrocarbon polymer.
Fluidized bed gasification reactor can be vapourizing furnace, for example can be tower-like gasification tower; Gasifying medium can air, it also can be the gasifying medium that in air, has added other composition, or the gasifying medium that each composition in the air has been carried out adjusting, 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, with the composition of control transformation efficiency, productive rate and product such as combustion gas.
In biomass gasification reaction of the present invention system, the gasifying medium plenum system can comprise that wind send device, such as gas blower, wind send device to be connected in the gasifying medium entrance of fluidized bed gasification reactor bottom by pipeline, and the bottom of gasifying medium from fluidized bed gasification reactor is blown into.
In biomass gasification reaction of the present invention system, may further include heat exchanger, wherein, from the combustion gas of the second tripping device gas outlet with from the gasifying medium of gasifying medium plenum system this heat exchanger of flowing through, and generation heat exchange, gasifying medium is preheated, and combustion gas is cooled; Afterwards, the gasifying medium that is preheated then via the gasifying medium entrance of fluidized bed gasification reactor, is sent into fluidized bed gasification reactor, and the downstream unit of biomass gasification reaction system is then delivered in the combustion gas that is cooled.This design can make product such as the combustion gas of leaving reactive system lower the temperature on the one hand, so that it further is utilized; On the other hand, can utilize high-temperature fuel gas preheating gasifying medium, reach certain temperature so that enter the gasifying medium of fluidized bed gasification reactor, the reacting balance of being convenient in the fluidized bed gasification reactor carries out, and fully reclaims the entrained heat of product.
In biomass gasification reaction of the present invention system, its biomass material plenum system can comprise stokehold storage device and stokehold pay-off; Wherein, the stokehold storage device comprises surge bunker and working bin, and surge bunker and working bin comprise respectively opening for feed and discharge port, and the opening for feed of working bin engages with the discharge port of surge bunker; The stokehold pay-off will be sent into from the raw material of working bin discharge port the first opening for feed of fluidized bed gasification reactor.
For example, above-mentioned surge bunker and working bin can be arranged up and down, and the top fed mouth of working bin is positioned at the below of the bottom discharge mouth of surge bunker; The feed end of stokehold pay-off is positioned at the bottom discharge mouth below of working bin, and its discharge end passes into the first opening for feed of fluidized bed gasification reactor.
Have biomass material such as biological particles shape raw material in the surge bunker, during work, biological particles temporary in the surge bunker is introduced into working bin, falls into the stokehold pay-off by working bin.This design can prevent that the reactant gases of heat in reactive system such as the fluidized bed gasification reactor from being leaked by working bin.Because reactant gases comprises CO, H
2And CH
4Etc. inflammable, explosive composition, what it leaked is dangerous self-evident.Preferably, bottom discharge mouth place at surge bunker and working bin is equipped with valve, such as rotary valve, ball valve, cylinder valve etc., and these rotary valves play a kind of effect of air-lock device, for example, when working bin in the fluidized bed gasification reactor during feed, then the rotary valve of working bin is in open mode, and the rotary valve of surge bunker is in closure state; And when surge bunker was reinforced to working bin, then the rotary valve of working bin was in closing condition, and the rotary valve of surge bunker is in open mode.Such design can solve well and prevent the problem that reactant gases leaks when reinforced in the reactive system.Further, surge bunker can be a plurality of, for example, a plurality of parallel surge bunkers can be arranged, and each directly links to each other with working bin, but its rotary valve opens successively, and such design can adapt to the reactive system of continuously feeding; Perhaps, a plurality of surge bunkers are to be connected in series, and wherein, only have a surge bunker near working bin directly to be connected with working bin, and such design is a kind of multistage air-lock device, further reduces the possibility that reactant gases leaks; Certainly, the design of a plurality of surge bunkers also can be both to have comprised parallel connection, also comprises being connected in series.
Preferably, in biomass gasification reaction of the present invention system, the first e Foerderanlage, the second e Foerderanlage and/or stokehold pay-off are helix transporting device.
Further, also comprise feed bin and pay-off in biomass gasification reaction of the present invention system, wherein, feed bin comprises top fed mouth and bottom discharge mouth, and pay-off comprises horizontal conveying belt and high spud angle conveying belt; Horizontal conveying belt is positioned at the bottom discharge mouth below of feed bin, and the initiating terminal of high spud angle conveying belt engages with the horizontal feed end of tape, and the end of high spud angle conveying belt is positioned at the top fed mouth top of surge bunker.Biological particles shape raw material enters feed bin from the opening for feed at feed bin top, falls on the horizontal conveying belt from the discharge port of bin bottom, goes to the high spud angle conveying belt by horizontal conveying belt again, finally finishes to surge bunker reinforced by the high spud angle conveying belt.
Because fluidized bed gasification reactor can produce some solid waste, if untimely eliminating can affect normally carrying out of gasification reaction.Thereby biomass of the present invention reaction system can also comprise slag discharging device, and this slag discharging device can be a helix transporting device, and the discharge end of this helix transporting device is higher than its feed end, leaks via this slag discharging device to prevent reactant gases.Because gasification system of the present invention is a pressure-fired system, this inclined design can play the effect of lock gas well.Further, can be equipped with valve in the waste exit of fluidized bed gasification reactor bottom and the discharge end of slag discharging device, such as rotary valve, ball valve, cylinder valve etc., and these rotary valves play a kind of effect of air-lock device, for example, when the outside deslagging of slag discharging device, then the rotary valve of slag discharging device discharge end is in open mode, and the rotary valve of the waste outlet of fluidized bed gasification reactor bottom is in closure state; And when fluidized-bed gasification was reacted to the slag discharging device deslagging, then the rotary valve of slag discharging device discharge end was in closing condition, and the rotary valve of the waste outlet of fluidized bed gasification reactor bottom is in open mode.
Further preferably, the slag discharging device discharge end is provided with the water receptacle that water is housed, in order to form water seal at the slag discharging device discharge end.
In order to increase the fluid effect of biological particles, be equipped with a plurality of ventilator trunks in the bottom of fluidized bed gasification reactor, the blast inlet of ventilator trunk communicates with the gasifying medium entrance of fluidized bed gasification reactor, be covered with the blast cap of bamboo hat-shaped on the air outlet of ventilator trunk, be equipped with a plurality of apertures on the blast cap, be used for the ejection air and avoid simultaneously the air outlet of ventilator trunk to be stopped up by biological particles.
Compared with prior art, the present invention is because the first bell jar that uses pull bar to connect is controlled the switch of combustion gas, and the resistance of opening or closing is little, and switch speed is fast, high efficiency; Simultaneously be provided with the second water receptacle and the second bell jar in the through hole on water seal arrangement shell top, namely be provided with again a secondary water seal arrangement in the through hole that pull bar passes, avoided combustion gas to be leaked to the danger such as the blast that causes the air and personnel poisoning from this through hole; By multi-stage separation device is set, biological particles can fully be reacted, improved gasification efficiency, saved the energy, produced more combustion gas, improved the combustion gas thermal value; Because the biological particles sufficient reacting has reduced the generation of tar and dust, the potential safety hazard of having avoided tar and dust to form in fluidized bed gasification reactor has reduced the problem of environmental pollution that processing tar and dust bring simultaneously.
Below in conjunction with drawings and Examples, further specify the present invention, but the present invention is not limited to these embodiment, any on essence spirit of the present invention improvement or substitute, still belong to scope required for protection in claims of the present invention.
Description of drawings
Fig. 1 is the structural representation of biological mass combustable gas water seal arrangement specific embodiment of the present invention;
Fig. 2 is the structural representation of biomass gasification reaction of the present invention system specific embodiment.
Embodiment
As shown in Figure 1, the specific embodiment of biological mass combustable gas water seal arrangement of the present invention comprises: the first water receptacle 123, shell 121, the first bell jar 122, pull bar 124, the second water receptacle 131, the second bell jar 132.
Wherein, fill water in the first water receptacle 123, the first water receptacle 123 side wall upper part are equipped with overflow weir 127, the first water receptacles 123 lower sidewall high-pressure water inlet 125 and high pressure water outlet 126 are set; The first water receptacle 123 bottoms have a through hole, and gas pipeline passes from this through hole, the through hole of the first water receptacle 123 bottoms and the sealing of the joint portion of gas pipeline; Shell 121 covers in the first water receptacle 123 tops, and shell 121 bottoms are equipped with a plurality of limbers; 121 are provided with gas outlet 128 on the shell; Be provided with vertical diffuse channel 111 on the gas pipeline.
The bottom of the second water receptacle 131 has a through hole, and this through hole is provided with pipeline, and this through hole overlaps with the through hole at shell 121 tops; The second bell jar 132 is connected in pull bar 124, and covers on the top of the second water receptacle 131 pipelines.Water level in the second water receptacle 131 is darker, and the second bell jar 132 is longer simultaneously, no matter pull bar 124 pull-ups or fall, and the bottom of the second bell jar 132 is positioned at below the water surface of the second water receptacle 131 all the time.
When gasification reaction carries out, ceaselessly to the 123 interior water fillings of the first water receptacle.When not needing gas supply, the first bell jar 122 falls, and covers on the exit end of gas pipeline, and this moment, the bottom of the first bell jar 122 was positioned at below the water surface, and the combustion gas in the gas pipeline is just lived by the water seal in the first bell jar 122 and the first water receptacle 123; When the needs gas supply, pull bar 124 pull-ups cover on the first bell jar 122 of the exit end of gas pipeline, and combustion gas just can be passed through from the gas outlet 128 on the shell 121; When the gas quantity that needs when the downstream user of gasification reaction system was less than the gas quantity that reaction generates, unnecessary combustion gas can enter diffuse channel 111, and is lighted at the exit end of diffuse channel 111.
As shown in Figure 2, the specific embodiment of biomass gasification reaction of the present invention system comprises: fluidized bed gasification reactor such as fluidized-bed 1, the first tripping device such as cyclonic separator 2, the second tripping device such as cyclonic separator 3, gasifying medium plenum system, heat exchanger 5, biomass material plenum system, feed bin 8, horizontal conveying belt 91, high spud angle conveying belt 92, waste pipe 101, slag discharging device such as worm conveyor 102, waste storage device 103, diffuse channel 111, water seal arrangement such as water-sealed valve 12.
Wherein, the top of feed bin 8 has opening for feed, and the bottom has discharge port; Horizontal conveying belt 91 is positioned at the bottom discharge mouth below of feed bin 8, and the initiating terminal of high spud angle conveying belt 92 engages with the end of horizontal conveying belt 91, and the end of high spud angle conveying belt 91 is positioned at the top fed mouth top of surge bunker 61.
The biomass material plenum system comprises surge bunker 61, working bin 62, stokehold pay-off (such as worm conveyor 7).The top of surge bunker 61 has opening for feed, and the bottom has discharge port; The top of working bin 62 has opening for feed, and the bottom has discharge port; Surge bunker 61 and working bin 62 are arranged up and down, and the top fed mouth of working bin 62 is positioned at the below of the bottom discharge mouth of surge bunker 61; The bottom discharge mouth place of surge bunker 61 is provided with rotary valve.The initiating terminal of stokehold pay-off such as worm conveyor 7 is positioned at the bottom discharge mouth below of working bin 62, and its terminal passes into the first opening for feed of fluidized-bed 1.
Fluidized-bed 1 middle part has the first opening for feed and the second opening for feed; Its bottom has gasifying medium entrance and waste outlet; Its top has material outlet.The waste outlet connects waste pipe 101, and waste pipe 101 exits are equipped with slag discharging device such as worm conveyor 102.Worm conveyor 102 is inclined upwardly, and namely its discharge end is higher than its feed end.The discharge end of worm conveyor 102 is equipped with waste storage device 103.
The top of the first tripping device such as cyclonic separator 2 has material inlet, and this material inlet links to each other by pipeline with the material outlet of fluidized-bed 1; Its middle part has material outlet; Its bottom has loop exit; This loop exit connects a regenerant apparatus for temporary storage 21 by pipeline, and the outlet at bottom of regenerant apparatus for temporary storage 21 has the first e Foerderanlage such as the worm conveyor that leads to fluidized-bed 1 second opening for feed outward.
The top of the second tripping device such as cyclonic separator 3 has material inlet; Its top has gas outlet, and gas outlet connects gas pipeline; Its bottom has loop exit; Loop exit has the second e Foerderanlage such as the worm conveyor that leads to regenerant apparatus for temporary storage 21 outward.
Heat exchanger 5 comprises fuel gas inlet, gas outlet and gas inlet, airout; Fuel gas inlet and gas outlet connect respectively gas pipeline; Gas inlet and airout connect respectively air line.
The gas outlet of the second tripping device such as cyclonic separator 3 is provided with water-sealed valve 12, and water-sealed valve 12 is positioned at before the heat exchanger 5.Water-sealed valve 12 is provided with a diffusion mouth, and this diffusion mouth connects diffuse channel 111.
In the present embodiment, the gasifying medium plenum system send device (such as gas blower 4) and corresponding pipeline for the wind that links to each other with heat exchanger 5; Certainly, can adopt in other embodiments the gasifying medium plenum system of other form fully.Wind send device such as gas blower 4 to be connected in the gas inlet of heat exchanger 5 by air line, and the airout of heat exchanger 5 is connected in the gasifying medium entrance of fluidized-bed 1 bottom, and the bottom of air from fluidized-bed 1 is blown into.As shown in Figures 2 and 3, the bottom of fluidized-bed 1 is equipped with a plurality of ventilator trunks, and the blast inlet of ventilator trunk communicates with the gas inlet of fluidized-bed 1, is covered with the blast cap of bamboo hat-shaped on the air outlet of ventilator trunk, is equipped with a plurality of apertures on the blast cap.
The working process of present embodiment is as follows:
Biological particles enters surge bunker 61 from feed bin 8 through horizontal conveying belt 91 and high spud angle conveying belt 92, enters working bin 62 through surge bunker 61, then enters fluidized-bed 1 through worm conveyor 7.Gas blower 4 is blown in fluidized-bed 1.Biological particles and air effect generate CO, H in fluidized-bed 1
2And CH
4Deng combustion gas and solid waste.Solid waste enters waste storage device 103 through waste pipe 101 and worm conveyor 102.
Combustion gas and not the biological particles of complete reaction enter cyclonic separator 2, combustion gas and lighter biological particles enter cyclonic separator 3 after separating, heavier biological particles returns fluidized-bed 1 by worm conveyor and continues to participate in reaction.
In cyclonic separator 3, combustion gas further separates with lighter biological particles, and combustion gas enters gas pipeline, is used for the air of reaction by heat exchanger 5 heating, simultaneously combustion gas is cooled, and the downstream unit of biomass gasification reaction system is delivered in the combustion gas that is cooled.Unnecessary combustion gas enters diffuse channel 111, in the lit-end of diffuse channel 111.
Claims (10)
1. biological mass combustable gas water seal arrangement that is used for the biomass gasification reaction system, the gas pipeline that described biomass gasification reaction system comprises fluidized bed gasification reactor and is connected in described fluidized bed gasification reactor; Described water seal arrangement comprises:
The first water receptacle, its bottom has a through hole, and described gas pipeline passes from this through hole, and the through hole of its bottom and the sealing of the joint portion of gas pipeline are to avoid gas leaking;
Shell, it covers in described the first water receptacle top, and its underpart is equipped with a plurality of limbers; Which is provided with gas outlet, its top is provided with the through hole that passes for pull bar; The exit end of described gas pipeline is positioned at the space of described the first water receptacle and shell encirclement, and is higher than the water surface in described the first water receptacle;
The first bell jar, it is positioned within the described shell, covers on the exit end of described gas pipeline, and its bottom is positioned at below the water surface of described the first water receptacle;
The second water receptacle is positioned at the top of described shell, and its bottom has a through hole, and this through hole is provided with pipeline, and this through hole overlaps with the through hole of described cover top portion;
Pull bar, the pull bar bottom is connected in the top of described the first bell jar, and passes from the through hole of described cover top portion;
The second bell jar, it is connected in described pull bar, and covers on the top of described the second water receptacle pipeline, and its bottom is positioned at below the water surface of described the second water receptacle.
2. water seal arrangement as claimed in claim 1 is characterized in that, the high pressure water outlet that the first water receptacle lower sidewall of described water seal arrangement is provided with the high-pressure water inlet that purges for the injection high pressure water and is used for blowdown.
3. water seal arrangement as claimed in claim 1 is characterized in that, described the first water receptacle side wall upper part is equipped with overflow weir.
4. water seal arrangement as claimed in claim 1 is characterized in that, described shell is provided with diffusion mouth.
5. the biomass gasification reaction system of the described water seal arrangement of one of an employing such as claim 1-4.
6. biomass gasification reaction as claimed in claim 5 system is characterized in that this biomass gasification reaction system comprises:
Fluidized bed gasification reactor for the preparation of biological fuel gas;
The biomass material plenum system of reaction raw materials is provided for described fluidized bed gasification reactor;
Tripping device more than the two-stage that is arranged at outside the described fluidized bed gasification reactor and the reaction product of described fluidized bed gasification reactor is separated, the above tripping device of this two-stage comprises the first tripping device and the second tripping device at least; And
The gasifying medium plenum system of gasifying medium is provided for described fluidized bed gasification reactor;
Wherein, the gas outlet of described the second tripping device is provided with described water seal arrangement.
7. biomass gasification reaction as claimed in claim 6 system, it is characterized in that described fluidized bed gasification reactor comprises the first opening for feed and the second opening for feed that is arranged at its central region, the gasifying medium entrance that is arranged at its bottom and waste outlet and the material outlet that is arranged at its upper area; Wherein, the first opening for feed of described fluidized bed gasification reactor engages with described biomass material plenum system, and the gasifying medium entrance of described fluidized bed gasification reactor engages with described gasifying medium plenum system;
Described the first tripping device comprises the material inlet that is arranged at its upper area, the loop exit that is arranged at the material outlet of its central region and is arranged at its bottom; Wherein, the material inlet of described the first tripping device engages with the material outlet of described fluidized bed gasification reactor, and the loop exit of described the first tripping device engages with the second opening for feed of described fluidized bed gasification reactor by the first e Foerderanlage; And
Described the second tripping device comprises gas outlet, the material inlet that is arranged at its upper area that is arranged at its top, the loop exit that is arranged at its bottom; Wherein, the material inlet of described the second tripping device engages with the material outlet of described the first tripping device, and the loop exit of described the second tripping device engages with the second opening for feed of described fluidized bed gasification reactor by the second e Foerderanlage and the first e Foerderanlage.
8. biomass gasification reaction as claimed in claim 6 system, it is characterized in that, described biomass gasification reaction system further comprises heat exchanger, wherein, from the combustion gas of described the second tripping device gas outlet with from the gasifying medium of described gasifying medium plenum system this heat exchanger of flowing through, and the generation heat exchange, gasifying medium is preheated, and combustion gas is cooled; Afterwards, the gasifying medium that is preheated then via the gasifying medium entrance of described fluidized bed gasification reactor, is sent into described fluidized bed gasification reactor, and the downstream unit of described biomass gasification reaction system is then delivered in the combustion gas that is cooled.
9. biomass gasification reaction as claimed in claim 6 system is characterized in that described biomass material plenum system comprises stokehold storage device and stokehold pay-off; Wherein, described stokehold storage device comprises surge bunker and working bin, and described surge bunker and described working bin comprise respectively opening for feed and discharge port, and the opening for feed of described working bin engages with the discharge port of described surge bunker; Described stokehold pay-off will be sent into from the raw material of described working bin discharge port the first opening for feed of described fluidized bed gasification reactor; The bottom discharge mouth place of described surge bunker and working bin is equipped with rotary valve.
10. biomass gasification reaction as claimed in claim 6 system, it is characterized in that, described biomass gasification reaction system further comprises slag discharging device, and this slag discharging device is a helix transporting device, and the discharge end of this helix transporting device is higher than its feed end.
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| CN201335405Y (en) * | 2008-12-18 | 2009-10-28 | 叶军 | Ecological environment-friendly high-efficiency energy-saving biomass composite gasifier |
| CN201923987U (en) * | 2010-11-01 | 2011-08-10 | 广州迪森热能技术股份有限公司 | Biomass fuel gas water seal device and biomass gasification reaction system employing same |
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| CN201335405Y (en) * | 2008-12-18 | 2009-10-28 | 叶军 | Ecological environment-friendly high-efficiency energy-saving biomass composite gasifier |
| CN201923987U (en) * | 2010-11-01 | 2011-08-10 | 广州迪森热能技术股份有限公司 | Biomass fuel gas water seal device and biomass gasification reaction system employing same |
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