CN101250415A - Double fluidized bed water-cooling biomass gasification furnace - Google Patents
Double fluidized bed water-cooling biomass gasification furnace Download PDFInfo
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- CN101250415A CN101250415A CNA2008100265844A CN200810026584A CN101250415A CN 101250415 A CN101250415 A CN 101250415A CN A2008100265844 A CNA2008100265844 A CN A2008100265844A CN 200810026584 A CN200810026584 A CN 200810026584A CN 101250415 A CN101250415 A CN 101250415A
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Abstract
The invention discloses a double fluid-bed water-cooled biomass gasifier, which comprises a gasifier body (1), a feeding mechanism (2), a blasting device (3), an ignition device, a slag removal mechanism (5), a fuel gas dust removing mechanism (6) and an outlet (7) of fuel gas, the gasifier body adopts a double fluid-bed structure, which is formed by a main fluid bed (11) and a side fluid bed (12) and are arranged in parallel, the main fluid bed is communicated with the upper portion of the side fluid bed, the main fluid bed is a main body of a gasfier, the feeding mechanism and the ignition device are all arranged on the main fluid bed, the feeding mechanism is arranged on the outer wall of the main fluid bed, the ignition device is arranged on the lower portion of a feed inlet of the main fluid bed, and the fuel gas dust removing mechanism is arranged on the fuel gas outlet of the side fluid bed. Most of foreign matters such as dust and the like which are contained in mixed gas can be lowered to the lower portion of the side fluid bed since the function of itself gravity, and then cleaning degree of mixed gas which gets into a condensing tower can be improved, compared with a single-gasification stove body in the prior art, the double fluid-bed water-cooled biomass gasifier is better to remove foreign matters.
Description
Technical field
The present invention relates to a kind of biomass gasifying furnace, particularly relate to a kind of double fluidized bed water-cooling biomass gasification furnace.
Background technology
Biomass energy is a kind of renewable energy source that is carrier with biomass, is produced by biomass, to be sun power be stored in a kind of form of energy in the biology with the chemical energy form for it, its reserves are abundant, spread all over all over the world, annual turnout just is equivalent to human 20 times of consuming the mineral energy of present stage, or being equivalent to 160 times of world's existing population food energy, it not only has inexhaustible characteristics; And it can realize CO during as energy utilization
2Zero release, can significantly reduce the Greenhouse effect phenomenon; In Wood Adhesives from Biomass is in the process of inflammable gas, and S wherein, N content are lower, thereby can effectively reduce environmental pollution, and therefore, biomass energy is that industrialized country increases income and decreases expenditure, turns harm into good and protects the green energy resource of environment in the world today.The Chinese government is clear and definite legally, and renewable energy source comprises the status of biomass energy in the modern energy, and has given huge preferential support on policy, and therefore, China's biomass energy development prospect and investment landscape are very wide.
Vapourizing furnace is one of important technology of biomass utilization, and it is mainly to be the waste of farm crop with plant, and for example stalk, rice husk, branch, wood chip, weeds etc. carry out combustion gasification as raw material, obtains inflammable gas---the technology of energy raw material.In the prior art, biomass gasifying furnace generally comprises the outlet of gasification body of heater, the feed mechanism that is positioned at upper of furnace body, portfire, the air inlet device of stove, the slagging device of being located at bottom of furnace body and inflammable gas and is used for dust separating dedusting mechanism, biomass material enters in the body of heater by feed mechanism, with enter oxidizing reaction and reduction reaction in the intravital oxygen course of emergency of the stove body of heater by air inlet device, promptly produce CO, CH
4, H
2Discharge from gas outlet Deng inflammable gas (comprising impurity such as dust, tar), the incendiary ashes fall into slagging device drains, and inflammable gas needs to carry out dedusting through dedusting mechanism in the process of discharging body of heater, so that clean as far as possible inflammable gas to be provided.Its weak point is:
(1) heat-energy losses of inflammable gas is excessive
When the vapourizing furnace of existing structure carried out the discharging of inflammable gas, its temperature still remained on more than 600 ℃, for the inflammable gas that contains such high calorie, was undoubtedly a kind of waste of heat energy.At present, the UTILIZATION OF VESIDUAL HEAT IN technical study of high-temperature combustible gas body also is in the basic blank stage, the Chinese patent communique once disclosed patent of invention " small biomass gasification furnace gas purifying and residual heat using device " (CN200610052449.8), be to adopt water jacket that the high-temperature combustible gas body is lowered the temperature, with the water in the heat transferred water jacket, form the combustion gas and the hot water service of thermophilic.But this technical scheme only is adapted to the production of small-sized family with combustion gas, and for macro-organism matter vapourizing furnace and inapplicable.
(2) water consumption of inflammable gas washing cooling is big
The temperature of inflammable gas could be used after must lowering the temperature to it more than 600 ℃.In the prior art, generally inflammable gas is lowered the temperature by 2-4 level condensing tower, the spray of big water gaging from the inflammable gas process condensing tower that vapourizing furnace comes out, the both dust in the flush away gas, tar etc., again high-temperature fuel gas is lowered the temperature, clean and cryogenic inflammable gas just can directly be transported to the combustion gas user or carry out canned.The above-mentioned process of giving a dinner of welcome, lowering the temperature often needs great amount of water resources, has not only wasted a large amount of water, but also has produced the sewage that contains tar in a large number, this sewage is difficult to purify and utilizes, if sewage discharge is careless, can causes the pollution of context again, thereby destroy ecotope.
(3) existing biomass gasifying furnace is single to the use of raw material, requirement is high
Biomass gasifying furnace of the prior art has only single opening for feed, because dissimilar vapourizing furnaces all has strict requirement to the biomass material and the water ratio thereof of different varieties, for example straw and straw are difficult to independent gasification owing to bulk density is too low, water content then is difficult to the difficulty etc. that gasifies of burning because of high humidity at the biomass material more than 15%, make single opening for feed be difficult to adapt to the requirement of combustion gasification of the biomass material of different varieties, caused biomass gasifying furnace often can only adapt among a small circle biomass material, cause its employed raw material to be subjected to great restriction, make biomass gasification technology be difficult to popularize and development.
Summary of the invention
The object of the present invention is to provide a kind of double fluidized bed water-cooling biomass gasification furnace that can utilize inflammable gas waste heat, energy-conservation, water saving, environmental protection.
Above-mentioned purpose of the present invention realizes by the following technical solutions: a kind of double fluidized bed water-cooling biomass gasification furnace, comprise the gasification body of heater, feed mechanism, air inlet device, portfire, slagging device, the outlet of inflammable gas dedusting mechanism and inflammable gas, wherein, feed mechanism is above portfire, air inlet device and slagging device are then below portfire, it is characterized in that described gasification body of heater adopts double-fluidized-bed structure, form and be set up in parallel by main fluidized-bed and secondary fluidized-bed, the top of main fluidized-bed and secondary fluidized-bed is communicated with, main fluidized-bed is the vapourizing furnace main body, described feed mechanism, portfire all is positioned on the main fluidized-bed, feed mechanism is positioned on the main fluidized-bed outer wall, portfire is arranged in the below of main fluidized-bed opening for feed, and the inflammable gas dedusting mechanism then is arranged at the inflammable gas exit of secondary fluidized-bed.
Working process of the present invention is: light a fire in main fluidized-bed, enter the biomass material in the stove and enter stove intravital oxygen generation oxidation and reduction reaction from feed mechanism by air inlet device, seethe burning and produce and contain nitrogen, oxygen, hydrogen, carbon monoxide, carbonic acid gas, methane, mixed gass such as CnHm, entrained dirt in the mixed gas, impurity such as tar, under the wind effect in heating power and dedusting mechanism from the master, the connecting passage on secondary fluidized-bed top flows to secondary fluidized-bed, after entering secondary vapourizing furnace, the chemical reaction of mixed gas is tending towards slowly and end gradually by active, utilize the space of secondary fluidized-bed, make the contained impurity major parts such as dust of mixed gas can fall to secondary fluidized-bed bottom because of the effect of self gravitation, have only the dust impurity of small portion to flow to outlet with mixed gas, and the dedusting mechanism that is set at the exit is removed, thereby reduce the dust quantity that removes of dedusting mechanism, and raising enters the degree of cleaning of the mixed gas of condensing tower, single gasification body of heater compared to existing technology, the better effects if of removal impurity.
The present invention can do following improvement: reach the top and be provided with water wall on described secondary fluidized-bed inwall, after the mixed gas of temperature up to 600～900 ℃ enters secondary fluidized-bed, by modes such as thermal conduction, thermal radiation with the heat transferred water wall, make on the one hand and the cooling of high-temperature gas mixture body can be reduced to about 250～300 ℃ by the temperature of its discharge; On the other hand, the heat of water wall absorption heats up and generation hot water and water vapor the water in the water wall.Like this,, realize the conversion of heat energy, to other system: provide hot water or water vapor such as hot-water heating gas system, air conditioner of heat energy system, hot water bathing system, steam generating system etc. by the heat exchanging process of high-temperature gas mixture body and water wall; The follow-up cooling of the inflammable gas of being discharged by vapourizing furnace then only needs just can directly flow to user's use or carry out canned through 1-2 level condensing tower, both can save great amount of water resources, can significantly reduce the sewage that contains tar again, thereby reduce the pollution of environment, made full use of simultaneously the heat energy of mixed gas again, for other system provides hot water or water vapor.
The present invention can also do further improvement: the top that the water wall of secondary fluidized-bed inner-wall surface setting is extended to described main fluidized-bed cavity inner wall, with the more mixed gas heat of further utilization, improve cooling-down effect and afterheat utilization rate to the high-temperature combustible gas body.
Dedusting mechanism of the present invention can adopt cyclonic separator, it is located at the above inflammable gas outlet pipe front end place in secondary fluidized-bed wall middle part or middle part, mixed gas separates through cyclonic separator, and the inflammable gas that is further purified is come out of the stove from inflammable gas again; On the inner-walls of duct at cyclonic separator place, also be provided with water wall, make the high temperature of inflammable gas obtain utilizing as far as possible fully; This cyclonic separator is communicated with secondary fluidized-bed lower chamber by the slag screw machine of going back of the pipeline connection of its bottom, makes cyclonic separator isolate that a part of dust, also sends in the secondary fluidized-bed, discharges through the secondary deslagging spiral of secondary fluidized-bed bottom.Cyclonic separator is located at secondary fluidized-bed middle part, help making the stroke of mixed gas in secondary fluidized-bed to increase, the amount of dust that makes mixed gas rely on gravity to sink increases, heat exchange amount increases, thereby make the degree of cleaning of the inflammable gas of discharging from combustible gas outlet higher, and help improving the cooling degree and the utilization rate of waste heat of inflammable gas.
Water wall of the present invention can be to adopt tubular type water wall or board-like water wall; Also can adopt the modular type water-cooling wall to be spliced.Because hot water or water vapor can be applicable to multiple other purposes systems such as hot-water heating gas system, air conditioner of heat energy system, hot water bathing system, steam generating system, therefore, described water wall can design according to the situation of intended application, both can be the water wall that the single water system of a kind of hot water or steam only is provided, also can be that different hot water that require and two kinds or the water wall of multiple water system of steam are provided simultaneously.
Water wall of the present invention is to utilize additionaling power to flow from bottom to up in described secondary fluidized-bed cavity, the water-in that is water wall is set in place in the water wall place of secondary fluidized-bed below, water outlet is set in place in the water wall place of secondary fluidized-bed top, and water outlet is connected with hot water or the applied system pipeline of steam.Described additionaling power generally adopts water pump, and water pump both can be arranged in the water wall pipeline of the present invention system, also can be arranged in the pipeline of external hot water or steam application system.
The present invention can also do following improvement: described feed mechanism is two or more, is distributed in main fluidized-bed top and communicates with furnace chamber, and be located at the corresponding position of furnace wall height by different biomass material characteristics.
The feed mechanism of corresponding height that is provided with on the furnace wall of the present invention is by different biomass material characteristics, be meant according to biomass characters and state, as lighter, particle is less or light easily and fully burning than the exsiccant biomass material, then its opening for feed is arranged on the lower position, gasification furnace wall, heavier, particle is big or have the biomass material of big water ratio then its opening for feed to be arranged on the higher position, gasification furnace wall, it is longer to make it to enter the distance that falls to point of ignition in the body of heater, thereby has long drying time, when described biomass material has just had when opening for feed drops down onto point of ignition and much the same ridity of the biomass material that enters from the lower position opening for feed and flammable state, thereby make different sorts or the different biomass material of water ratio on a vapourizing furnace, to use simultaneously.
The height that two or more feed mechanisms of the present invention are located on the furnace wall can be identical, can be different heights also, and perhaps part is identical, and part is different, looks the biomass material kind and the state of selection and determines.
Feed mechanism of the present invention can also be by difference towards setting.Different biomass materials by difference towards feed mechanism enter in the stove, make each biomass material be independent of each other, effect of combustion is better.
Compared with prior art, the present invention has following significant effect:
1, the present invention adopts double-fluidized-bed structure, can improve dust removal efficiency, obviously reduces impurity such as dust, charcoal particle in the inflammable gas.
2, the present invention utilizes double-fluidized-bed structure, further adopts the water wall heat exchanger in secondary fluidized-bed, makes on the one hand the cooling of high-temperature combustible gas body to be reduced to about 250～300 ℃ by the temperature of its discharge; On the other hand, can utilize the high temperature production hot water or the water vapor of inflammable gas to use the system of hot water or water vapor to use for other, as be used for hot-water heating gas system, air conditioner of heat energy system, hot water bathing system, steam generating system etc., energy-saving and cost-reducing, resource circulation utilization are all had positive society and economic benefit.
3, the present invention adopts double-fluidized-bed and water wall structure, can reduce the follow-up cooling process of the inflammable gas of vapourizing furnace discharge effectively, the inflammable gas that needs process multi-stage condensing tower to lower the temperature after former the coming out of the stove is improved to only needs dedusting of 1-2 level condensing tower and cooling to get final product, not only save water consumption over half than prior art, reduce biomass gasifying furnace and produce the cost of inflammable gas, energy-saving and cost-reducing; And, can also reduce the sewage emissions that contains chemical substances such as tar, thereby help environment protection.
4, the present invention can also further adopt a plurality of feed mechanisms, with the diversified situation of adapted biomass raw material, make the different biomass material of different sorts or water ratio on a vapourizing furnace, to use simultaneously, solve the problem that biomass gasifying furnace raw material use range is single, limit to, helped popularizing and development of biomass gasification technology greatly.
Description of drawings
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is the structural representation front view of the embodiment of the invention one;
Fig. 2 is the structural representation vertical view (feeding warehouse 9 does not draw) of the embodiment of the invention one;
Fig. 3 is the structural representation front view of the embodiment of the invention two;
Fig. 4 is the main TV structure simplified schematic diagram of the embodiment of the invention three main fluidized-beds;
Fig. 5 is the plan structure synoptic diagram of the embodiment of the invention three main fluidized-beds.
Embodiment
Embodiment one
As Fig. 1, double fluidized bed water-cooling biomass gasification furnace shown in 2 is one of embodiments of the invention, it comprises gasification body of heater 1, feed mechanism 2, air inlet device 3, portfire, slagging device 5, the outlet 7 of inflammable gas dedusting mechanism 6 and inflammable gas, wherein, described gasification body of heater 1 is made up of main fluidized-bed 11 and secondary fluidized-bed 12 and is set up in parallel, the top of main fluidized-bed 11 and secondary fluidized-bed 12 is communicated with, main fluidized-bed 11 is the vapourizing furnace main body, feed mechanism 2 and portfire all are positioned at the bottom of main fluidized-bed 11, portfire is arranged in the below of main fluidized-bed 11 feed mechanisms 2, air inlet device 3 adopts the air intake gas blower, the blast inlet (omitting among the figure) that is arranged on main fluidized-bed 11 bottoms is located, and 6 of inflammable gas dedusting mechanisms are arranged at the front end place of the inflammable gas outlet 7 of secondary fluidized-bed 12.
Present embodiment has been provided with the air distribution plate 8 of a plurality of intake openings uniform below described main fluidized-bed portfire, this air distribution plate 8 is level and is installed on the main fluidized-bed 11 furnace chamber inwalls, air inlet gas blower 3 is air intake from bottom to top, the intake opening of a large amount of airflows on air distribution plate 8 entered in the stove, airborne oxygen is evenly distributed in stove, make biomass material seethe burning fully, help improving the effect of gasification.Described slagging device adopts deslagging screw machine 51,52, is arranged at the bottom of main fluidized-bed 11 and secondary flowization 12 respectively, is used for the lime-ash that is deposited on the bottom is discharged outside the body of heater.
Be arranged at the front end place of the inflammable gas outlet pipe 7 at secondary fluidized-bed 12 middle parts as the cyclonic separator 6 of inflammable gas dedusting mechanism, export 7 front ends at the inflammable gas on the secondary fluidized-bed and install on the inner-walls of duct of cyclonic separator 6 water wall 13 also has been installed, with the cooling-down effect that increases inflammable gas and the utilization rate of waste heat of inflammable gas; This cyclonic separator 6 also the pipeline by its bottom with go back slag screw machine 10 and be communicated with secondary fluidized-bed 12 lower chamber.
Present embodiment described secondary fluidized-bed 12 inwalls and top thereof be provided with and the top of main fluidized-bed 11 and with major and minor fluidized-bed 12 between the pipeline that is communicated with water wall 13 is all arranged, this water wall is the tubular type water wall, many water pipes are horizontally arranged in the secondary fluidized-bed 12 and are provided with from bottom to top, cold water enters from the below of water wall 13, utilizes additionaling power such as water pump to make it mobile from bottom to up.After the mixed gas of temperature up to 600～900 ℃ enters secondary fluidized-bed 12, with the water in the heat transferred water wall 13, the temperature of mixed gas descends, the cold water that enters in the water wall 13 then is converted into hot water and the water vapor that can be used for other purposes through heat exchange, the water outlet that is positioned at the top of secondary fluidized-bed from water wall 13 flows out, and the other system that connects to water outlet provides hot water or water vapour.In the present embodiment, the current direction in the water wall and the flow direction of the mixed gas in the fluidized-bed are reverse direction, it is that the mixed gas situation consistent with the mobile direction of water compared with concurrent, finish under the condition of same heat transfer capacity, the former advantage is that mean temperature difference is increased, the heat transfer area of interchanger reduces, and helps saving equipment cost; In other words,, the consumption of heating or cooling fluid is reduced, then help saving operational cost, therefore adopt the mode of adverse current to have economical and practical advantage if heat transfer area is constant.Certainly, the water in the water wall also can adopt concurrent to flow, and can also adopt flow pattern such as the flow direction such as cross-flow and baffling to improve the utilization ratio of heat energy.The installation site of described water pump is more flexible, both can be arranged in the water wall pipeline system, also can be arranged in the pipeline of external hot water or steam application system.
In addition, because water wall mainly is arranged in the secondary fluidized-bed, the cooling power of water screen system can reach by adjusting following technical parameter, such as: secondary fluidized-bed internal diameter size, to improve the water wall amount of setting; Perhaps adjust control such as distribution number, water pipe parameter and the distribution density of water wall in secondary fluidized-bed water wall thermal energy exchange rate, the adjusting of parameter or structure formation by certain limit can be reduced to the high temperature of inflammable gas between 250～300 ℃.
In addition, the feed mechanism of present embodiment has adopted 3 screw feeders, they are respectively husk screw feeders 23, cotton stalk particle screw feeder 25 and straw wheat straw particle screw feeder 26, all is furnished with feeding warehouse 9, this triple helical charger is distributed on the outer wall of main fluidized-bed 11 and with furnace chamber and communicates, and be located at the different positions place of main fluidized-bed 11 furnace wall vertical heights respectively, because of cotton stalk and husk material density higher, but the husk particle is little, and straw wheat straw particle light weight water ratio is lower, so the cotton stalk screw feeder is located at position higher on the furnace wall, it is longer to make cotton stalk in it enters stove fall to the distance of point of ignition, thereby has long drying time, straw wheat straw screw feeder 26 then is located at the lower position place, it is shorter that straw wheat straw in it enters stove falls to the distance of combustion zone, husk screw feeder 23 at the height on the furnace wall then between cotton stalk screw feeder 25 and straw wheat straw screw feeder 26, thereby have close flammable state when making raw material that each feed mechanism advances to the combustion zone, and by the difference of main fluidized-bed 11 outer wall circumference towards being provided with.When present embodiment uses, three kinds of different types of biomass materials from different orientation, the different opening for feed of height enters in the main fluidized-bed 11, the main fluidized-bed ignition device, raw material with enter and a series of chemical reaction take place from the furnace bottom blast inlet by the uniform oxygen of air distribution plate, seething burning and producing a series of mixtures such as mixed gass such as containing nitrogen, oxygen, hydrogen, carbon monoxide, carbonic acid gas, methane, CnHm and lime-ash, charcoal particle.At this moment, the temperature of mixed gas is between 700～900 ℃, under the gravitational effect of cyclonic separator in air inlet gas blower 3 and inflammable gas exit, this mixed gas is flowed to secondary fluidized-bed 12 by main fluidized-bed 11, after entering secondary fluidized-bed 12, the chemical reaction of mixed gas is tending towards slowly and end gradually by active, a part of dust in the mixed gas can be because of inertia sedimentation in secondary fluidized-bed 12 of deadweight, cyclonic separator 6 also can be isolated a part of dust, fall in the secondary fluidized-bed 12, discharge through the secondary deslagging screw machine 52 of secondary fluidized-bed bottom.And mixed gas is flowed through on the major-minor fluidized-bed during set water wall 13, with the water in the heat transferred water wall, finish the temperature-fall period of high-temperature combustible gas body, hot water or water vapor are positioned at the top of secondary fluidized-bed from water wall 13 water outlet flows out, and the other system that connects to water outlet provides hot water or water vapour; Meanwhile, the temperature of the inflammable gas of discharging from inflammable gas outlet only needs through the further cooling of 1-2 level condensing tower afterwards again and gives a dinner of welcome about 250 ℃, just can flow to user's use or carry out canned.
Embodiment two
Double fluidized bed water-cooling biomass gasification furnace shown in Figure 3 is a present embodiment two of the present invention, be not only one deck water wall 13 to be set in the secondary fluidized-bed 12 with the difference of embodiment one along its inwall, and in described water wall 13 encloses the interior space of the secondary fluidized-bed of drawing together, tube coil type heat exchanger 14 is set again, coil pipe vertically is provided with, water-in 14a is located at the coil pipe below, water outlet 14b is arranged at the top of coil pipe, to obtain further cooling-down effect and to improve inflammable gas afterheat utilization rate.
Embodiment three
As Fig. 4, double fluidized bed water-cooling biomass gasification furnace shown in 5 is a present embodiment three of the present invention, be that with the difference of embodiment one described feed mechanism is six, what all adopt is screw feeder, they are respectively branch wood chip screw feeder 21, kaoliang stalk, corn stalk screw feeder 22, husk screw feeder 23, reed charger 24, advance cotton stalk particle screw feeder 25 and advance straw wheat straw particle screw feeder 26, they are respectively along the different directions of main fluidized-bed 11 outer wall circumference and communicate with furnace chamber, and being positioned at height on the main fluidized-bed essentially identical with screw feeder is one group, the position that distributes on the circumference of furnace wall of charger is a first-selection with farthest relative position on the same group, present embodiment divides 3 groups of screw feeders to be located at the different positions place of main fluidized-bed 11 furnace wall height respectively, wherein, characteristic according to concrete biomass is provided with the opening for feed height, bigger with particle, raw material heavier or that water ratio is bigger enters in the stove from higher opening for feed, less with particle, the light or lower raw material of water ratio enters in the stove from higher opening for feed, because cotton stalk branch wood chip and husk material density are higher, but the husk particle is little, kaoliang stalk, corn stalk, reed matter density is taken second place, but water ratio is higher, so screw feeder 21 and 22 is for being mounted on place, higher position on the furnace wall together, it is longer to make raw material in it enters stove fall to the distance of point of ignition, thereby has long drying time, straw wheat straw particle light weight water ratio is low to be one group, 26 of its screw feeders are located at the lower position place, it is shorter that raw material in it enters stove falls to the distance of combustion zone, screw feeder 23,24 and 25 are positioned at height on the furnace wall then between screw feeder 21 for same group, 22 and screw feeder 26 between, thereby have close flammable state when making raw material that each feed mechanism advances, realize six kinds of weight to the combustion zone, size, the different biomass material of water ratio can use on a vapourizing furnace simultaneously.
Claims (10)
1. double fluidized bed water-cooling biomass gasification furnace, comprise gasification body of heater (1), feed mechanism (2), air inlet device (3), portfire, slagging device (5), the outlet (7) of inflammable gas dedusting mechanism (6) and inflammable gas, wherein, feed mechanism (2) is above portfire, air inlet device (3) and slagging device (5) are then below portfire, it is characterized in that described gasification body of heater (1) adopts double-fluidized-bed structure, form and be set up in parallel by main fluidized-bed (11) and secondary fluidized-bed (12), the top of main fluidized-bed (11) and secondary fluidized-bed (12) is communicated with, main fluidized-bed (11) is the vapourizing furnace main body, described feed mechanism (2), portfire all is positioned on the main fluidized-bed (11), feed mechanism (2) is positioned on main fluidized-bed (11) outer wall, portfire is arranged in the below of main fluidized-bed (11) opening for feed, and inflammable gas dedusting mechanism (6) then is arranged at the inflammable gas outlet (7) of secondary fluidized-bed (12) and locates.
2. double fluidized bed water-cooling biomass gasification furnace according to claim 1 is characterized in that: on described secondary fluidized-bed (12) inwall and top is provided with water wall (13), so that the cooling of high-temperature gas mixture body; Simultaneously, the heat of the mixed gas that water wall (13) absorbs heats up the water in the water wall (13) and produces hot water and water vapor, and water wall (13) has and is used for the water outlet that is connected with this hot water or the applied system pipeline of steam.
3. double fluidized bed water-cooling biomass gasification furnace according to claim 2, it is characterized in that: the water wall (13) that is provided with at described secondary fluidized-bed (12) inner-wall surface extends to the top of described main fluidized-bed (11) cavity inner wall, with cooling-down effect and the afterheat utilization rate of further raising to the high-temperature combustible gas body.
4. double fluidized bed water-cooling biomass gasification furnace according to claim 3, it is characterized in that: described dedusting mechanism (6) adopts cyclonic separator, it is located at above inflammable gas outlet (7) the pipe front end place in secondary fluidized-bed (12) wall middle part or middle part, on the inner-walls of duct at cyclonic separator place, also be provided with water wall (13), this cyclonic separator is communicated with secondary fluidized-bed (12) lower chamber by the slag screw machine (10) of going back of its bottom, make cyclonic separator isolate that a part of dust, also send in the secondary fluidized-bed, discharge through the secondary deslagging spiral of secondary fluidized-bed bottom.
5. double fluidized bed water-cooling biomass gasification furnace according to claim 4, it is characterized in that: described water wall (13) is to utilize external force to flow from bottom to up in described secondary fluidized-bed (12) cavity, the water-in of water wall (13) is set in place in the water wall place of secondary fluidized-bed (12) below, and water outlet is arranged on the water wall place that hot water is positioned at secondary fluidized-bed (12) top.
6. double fluidized bed water-cooling biomass gasification furnace according to claim 5 is characterized in that: described water wall (13) adopts the tubular type water wall.
7. double fluidized bed water-cooling biomass gasification furnace according to claim 6, it is characterized in that: described water wall (13) encloses in the interior space of the secondary fluidized-bed of drawing together (12) tube coil type heat exchanger (14) is set, this coil pipe (14) is vertical to be provided with, water in the coil pipe is to be flowed from bottom to up by additionaling power, water-in (15) is located at the coil pipe below, water outlet (16) is arranged at the top of coil pipe, and described water outlet is used for being connected with hot water or the applied system pipeline of steam.
8. according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 described double fluidized bed water-cooling biomass gasification furnaces, it is characterized in that: the below in described main fluidized-bed (11) portfire is provided with the air distribution plate (8) that is evenly equipped with a plurality of intake openings, this air distribution plate (8) level is installed on main fluidized-bed (11) the furnace chamber inwall, in air distribution plate (8) below air inlet gas blower (3) is set, the intake opening of a large amount of airflows on air distribution plate (8) entered in the stove, and airborne oxygen is evenly distributed in stove.
9. double fluidized bed water-cooling biomass gasification furnace according to claim 8, it is characterized in that: described feed mechanism (2) is two or more, be distributed in main fluidized-bed (11) top and communicate, and be located at the corresponding position of furnace wall vertical height by different biomass material characteristics with furnace chamber.
10. double fluidized bed water-cooling biomass gasification furnace according to claim 9, it is characterized in that: described feed mechanism (2) by difference towards being provided with on main fluidized-bed (11) outer wall so that different biomass material difference towards feed mechanism do not disturb mutually when entering in the stove.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200810026584 CN101250415B (en) | 2008-03-04 | 2008-03-04 | Double fluidized bed water-cooling biomass gasification furnace |
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| CN 200810026584 CN101250415B (en) | 2008-03-04 | 2008-03-04 | Double fluidized bed water-cooling biomass gasification furnace |
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| CN101250415B CN101250415B (en) | 2013-05-29 |
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| CN (1) | CN101250415B (en) |
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| CN101775315A (en) * | 2009-12-25 | 2010-07-14 | 卢秉威 | Double-bed sludge gasification furnace |
| CN101967398A (en) * | 2010-11-01 | 2011-02-09 | 广州迪森热能技术股份有限公司 | Biomass gasification parallel reaction technology |
| CN101967400A (en) * | 2010-11-01 | 2011-02-09 | 广州迪森热能技术股份有限公司 | Biomass gasifying parallel connection reaction system |
| CN105783043A (en) * | 2016-01-30 | 2016-07-20 | 陈烁华 | Vapor type coal conversion gas engine unit |
| CN109539548A (en) * | 2018-11-14 | 2019-03-29 | 江苏金满穗农业发展有限公司 | One kind is spurted the husk hot-blast stove that burns |
| CN109539547A (en) * | 2018-11-14 | 2019-03-29 | 江苏金满穗农业发展有限公司 | It is a kind of using cavings as the hot-blast stove of fuel |
| CN110145864A (en) * | 2019-06-17 | 2019-08-20 | 鸡西市圣火锅炉制造有限公司 | Biomass packs fuel boiler |
| CN113491883A (en) * | 2021-08-12 | 2021-10-12 | 江西全兴化工填料有限公司 | Metal-packed fractionating tower for separating combustible gas |
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| CN2538804Y (en) * | 2002-03-23 | 2003-03-05 | 合肥天焱绿色能源开发有限公司 | Biomass fixed bed gasification furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101775315A (en) * | 2009-12-25 | 2010-07-14 | 卢秉威 | Double-bed sludge gasification furnace |
| CN101967398A (en) * | 2010-11-01 | 2011-02-09 | 广州迪森热能技术股份有限公司 | Biomass gasification parallel reaction technology |
| CN101967400A (en) * | 2010-11-01 | 2011-02-09 | 广州迪森热能技术股份有限公司 | Biomass gasifying parallel connection reaction system |
| CN105783043A (en) * | 2016-01-30 | 2016-07-20 | 陈烁华 | Vapor type coal conversion gas engine unit |
| CN109539548A (en) * | 2018-11-14 | 2019-03-29 | 江苏金满穗农业发展有限公司 | One kind is spurted the husk hot-blast stove that burns |
| CN109539547A (en) * | 2018-11-14 | 2019-03-29 | 江苏金满穗农业发展有限公司 | It is a kind of using cavings as the hot-blast stove of fuel |
| CN110145864A (en) * | 2019-06-17 | 2019-08-20 | 鸡西市圣火锅炉制造有限公司 | Biomass packs fuel boiler |
| CN110145864B (en) * | 2019-06-17 | 2024-05-03 | 鸡西市亿立锅炉制造有限公司 | Biomass bale fuel boiler |
| CN113491883A (en) * | 2021-08-12 | 2021-10-12 | 江西全兴化工填料有限公司 | Metal-packed fractionating tower for separating combustible gas |
| CN113491883B (en) * | 2021-08-12 | 2022-06-28 | 江西全兴化工填料有限公司 | Metal packed fractionating tower for separating combustible gas |
| CN115109619A (en) * | 2022-05-25 | 2022-09-27 | 华中科技大学 | Biomass gasification furnace, double-furnace gasification device and biomass gasification system |
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