CN203582820U - Coupling-type biomass pressurization pyrolysis system - Google Patents
Coupling-type biomass pressurization pyrolysis system Download PDFInfo
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- CN203582820U CN203582820U CN201320775425.0U CN201320775425U CN203582820U CN 203582820 U CN203582820 U CN 203582820U CN 201320775425 U CN201320775425 U CN 201320775425U CN 203582820 U CN203582820 U CN 203582820U
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Abstract
The utility model relates to a coupling-type biomass pressurization pyrolysis system. A high-temperature synthesis gas outlet is formed in the top of a pyrolysis furnace; two side feeding inlets are formed in the middle segment of the pyrolysis furnace; a plurality of microwave inlets and plasma torch interfaces are formed in the lower part of the pyrolysis furnace; a slag discharging outlet is formed in the bottom of the pyrolysis furnace; the microwave inlets and the plasma torch interfaces of the pyrolysis furnace are uniformly and annularly arranged at intervals in a multilayer manner respectively; the plasma torch interfaces are positioned below the microwave inlets; a pulse-type feeding system is connected with the feeding inlets of the pyrolysis furnace and is controlled in a switching manner through a feeding controller; the synthesis gas outlet in the top of the pyrolysis furnace is connected with a cyclone separator; the slag discharging outlet in the bottom of the pyrolysis furnace is connected with a slag lock; the ash outlet of the cyclone separator is connected with an ash lock; the cyclone separator is connected with a cooling device; the cooling device is connected with a purification device. The pyrolysis furnace is operated in a pressurization manner, so that the treatment capacity of the single pyrolysis furnace is large; the additional arrangement of a compressor during a subsequent utilization process is not required, so that a large quantity of compression works are saved, namely, the energy consumption of a system is decreased. The generated synthesis gas does not contain tar, so that the subsequent purification process is simple. Thus, the environmental pollution is avoided.
Description
Technical field
The utility model is mainly for biomass fuel gas processed field, is specifically to adopt a kind of microwave and plasma pyrolysis to produce the manifold type biomass pressurized pyrolysis system of biomass synthesis gas.
Background technology
Current, at biomass fuel, utilize field, relatively directly burning, gasifying biomass is converted into biomass solid fuel the synthetic gas that is rich in carbon monoxide and hydrogen, take synthetic gas as unstripped gas, can carry out the techniques such as methanation, synthetic ammonia, urea, methyl alcohol and synthetic liquid fuel, enrich like this biomass purposes, expand biomass and utilized field.
In biomass pyrogenation gasification process, because pyrolytic gasification reaction total reaction is endothermic process, in pyrolytic process, needing to add extra power maintains pyrolytic reaction and carries out, conventional pyrolytic process generally adopts the mode of partition-wall heat transfer, heat is progressively transmitted by fuel surface from outside to inside by partition, thereby it is low to exist energy transfer efficiency, the incomplete shortcoming of fuel thermal decomposition.
And emerging microwave-heating stove adopts microwave as heat source, its heating efficiency is conducted heat apparently higher than dividing wall type, even if but utilize microwave-heating also to exist biomass pyrolytic reaction not exclusively, gas production rate is not high, in pyrolysis product, there is most of biological coke to generate, cannot accomplish biomass to be all converted into synthetic gas.
CN200880124955.0 utilizes the method for sun power, microwave and plasma body prepare liquid fuel and hydrogen from biomass or coal, is by using dissimilar plasma body (electro-plasma, microwave plasma, ICP plasma body, light plasma) to make CO
2the carbon loss of form minimizes.In whole process, by these plasma bodys as being CO by CO by oxidation of coal
2be reduced into the additional means of CO.By using different metal element (Mg, Mn, Al, Fe, Si, SiO
2deng) enrichment plasma body strengthens the effect of plasma body.And the processing method of gasification in CN201110449489.7, CN201110449413.4 and CN201110449459.6 to be all single employing microwave plasma apparatus carry out stove, not yet appear at present in stove and encourage plasma body to form secondary plasma field by specific magnetically confined, thus the application report of gasification reaction in strengthening stove.
In addition, in biomass pyrogenation gasification process, add pressure energy and improve throughput, increase single furnace output, reduce oxygen consumption, reduce carry-over loss; Technique for synthetic gas for the synthetic oil that pressurizes, front compression can be saved the energy of rear compression greatly, has improved the energy consumption of total system, and meanwhile, after pressurization, material concentration is high, same volume equipment, processing power is large.But due to the characteristic of biomass fuel self, conventional press feed-type needs moulding or slurrying or powder process, thereby pressurization feeding operation is more difficult and less economical, has no at present the report of successful pressurization biomass pyrolysis furnace/vapourizing furnace.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of manifold type biomass pressurized pyrolysis system, adopt microwave and plasmon coupling technique to high-efficiency ground that biomass fuel combustiblecomponents is all converted into synthetic gas, good economy performance, efficiency are high, efficiency of carbon conversion is high, synthetic gas quality better, the long-pending content of available gas reaches more than 90%; Meanwhile, in the large and later use process of pyrolysis oven list stove processing power, without setting up compressor, save in a large number compression work, reduce system energy consumption; Finally, in generation synthetic gas, without tar, follow-up purification process is simple, non-environmental-pollution.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is as follows:
A manifold type biomass pressurized pyrolysis furnace system, comprises pyrolysis oven, pulsed feeding system, cyclonic separator; Pyrolysis oven top arranges high-temperature synthesis gas outlet, and stage casing arranges both sides material inlet, and bottom arranges a plurality of microwave entrances and plasmatorch interface, and bottom arranges holds slag bath, holds slag bath and is arranged with slag-drip opening; The microwave entrance of pyrolysis oven and plasmatorch interface be all arranged to multilayer and every layer all evenly interval arrange;
It is characterized in that plasmatorch interface is placed under microwave entrance holds on slag bath liquid level face, and within the plasma jet direction of plasmatorch interface is positioned at the microwave field scope of microwave entrance; Below the single microwave power 300kw of microwave entrance;
Pulsed feeding system is connected by carrying path with pyrolysis oven material inlet, and pulsed feeding system and feed conveying gas pipeline communication also arrange feeding controller and carry out on-off control; Pyrolysis oven top syngas outlet is connected with cyclonic separator, pyrolysis oven bottom slag-drip opening and the phase-locked company of slag, and cyclonic separator ash output hole and grey phase-locked company, cyclonic separator is connected with refrigerating unit, and refrigerating unit is connected with refining plant; High-temperature synthesis gas circulation chilling device is set between pyrolysis oven top syngas outlet and cyclonic separator.
By technique scheme, the outer series connection of slag-drip opening of pressurized pyrolysis furnace body bottom arranges at least two-stage slag lock; The outer series connection of cyclonic separator bottom deslagging mouth arranges at least two-stage ash lock.
By technique scheme, decarbonizing tower is also set after refining plant; The feed conveying gas pipeline communication of the outlet of decarbonizing tower carbon dioxide and pulsed feeding system.
By technique scheme, described pyrolysis oven integral body is round tube type, and furnace outer wall adopts steel to make, and inwall is that refractory brick is piled up or adopts water wall structure.
Biomass fuel carries out pressurized pyrolysis when reaction interior, and pyrolysis oven keeps operating mode with pressure; Specifically comprise the steps:
1): biomass fuel is broken, be sized to qualified particle diameter, deliver to special-purpose pulsed pressurization feeding system, to utilize feed sealing air to carry out close phase static pressure, carry;
2): broken good biological particles is in feeding system is delivered to pyrolysis oven, microwave and plasma square are started working simultaneously, microwave makes to form high-strength microwave field in pyrolysis oven, and the high-temperature plasma jet that plasmatorch working gas ionizes formation first enters in pyrolysis oven;
Microwave biological matter particle absorbs inside and outside synchronous intensification of particle after microwave, thus activation, pyrolysis; In the up flue gas of high temperature and stove, under the effect of high-strength micro-wave energy, microwave biological matter particle wink-dry, division also heat up and form high-temperature synthesis gas rapidly, and the fixed bed that remains the residual burnt material formation of lime-ash and small part after pyrolysis moves down;
Plasma jet, under the electromagnetic coupled effect of high-strength microwave field, makes charged ion peripheral gas continue ionization, forms high energy, high reactivity secondary ion field, further accelerates biomass granule fuel material heat and mass transfer speed of reaction; In fixed bed bottom, the high-temperature plasma Gas Jet that plasmatorch produces is converted into high-temperature synthesis gas completely to residual burnt class material or carbonaceous material, in pyrolysis oven, keep operating mode with pressure simultaneously, gaseous phase materials concentration in stove is continued to increase, further fast reaction speed, increase gas-solid reaction duration of contact, make bottom solid biomass particles fuel be converted into high-temperature synthesis gas completely;
In fixed bed, move down simultaneously, high-temperature synthesis gas is up provides heat energy to fixed bed, is the top pyrolytic reaction gas CO that supplies raw materials simultaneously
2; Non-carbonaceous material continues the descending lime-ash that becomes; Under hot environment, lime-ash is in a liquid state and pyrolysis oven is accumulated in bottom, and liquid lime-ash adopts regularly or the mode of discharging continuously maintains and sets slag position;
3) high-temperature synthesis gas generating: step 2) continues up, by pyrolysis oven Base top contact, after adopting the cooling of circulation synthetic gas Quench in pipeline, enters cyclonic separator separation and flies slag, finally enters refrigerating unit and refining plant and produces clean synthetic gas.
1100 ℃ of pyrolysis oven syngas outlet temperature～more than 1300 ℃; Pyrolysis reaction temperature is more than 1200 ℃, and bottom high temperature slag bath maintains 1300 ℃～2000 ℃; When biomass fuel is high ash melting point fuel, add Wingdale as fusing assistant, reduce the melting temperature of slag;
The microwave entrance of pyrolysis oven adopts and is circular layout, and arranges according to fuel characteristic multilayer, below single microwave power 300kw; High-temperature synthesis gas is 8～15s at residing time in furnace; In stove, absolute pressure is 0.1Mpa～5Mpa.
In unit time, microwave and plasmatorch total input energy account for 15%～30% of input biomass fuel total energy; When plasma working gas adopts oxygen, residual burnt quality accounts for biomass fuel quality below 10%, and it is between biomass fuel total energy 5%～10% that microwave and plasmatorch consume total electric energy.
In step 3), according to the difference of later use technique, cyclonic separator gas out adopts cooling step by step and washing process or adopts water chilling technology to process.
Step 2) liquid slag that accumulate pyrolysis oven bottom regularly or is continuously discharged to maintain slag position, and liquid slag, after the slag lock with water-cooled or water Quench, is carried out recycle under normal temperature state.
Plasmatorch working gas be carbon dioxide and or water vapor and or oxygen and or purify after synthetic gas; The plasma jet that plasmatorch working gas ionizes formation first consists of at interior high energy active particle ion, electronics, free radical.
Pulsed pressurization feeding system is by the feeding of feed delivering gas, and feed delivering gas is the synthetic gas after nitrogen, steam, carbon dioxide or purification.
With respect to prior art, the beneficial effects of the utility model are:
Of the present utility model is that biomass fuel combustiblecomponents is all converted into high-quality synthetic gas, and available gas content is high, should meet the requirement with pressure of later use technique simultaneously.And conventional biomass pyrolytic technique, although can produce the good synthetic gas of quality, but all remain residual Jiao of biomass, its weight accounts for weight of fuel 20%～30%, simultaneously biological burnt mixed in together with lime-ash, not only cause a large amount of sensible heat loss, and biology Jiao who generates under Pintsch process compares reactive behavior reduction with biomass, be unfavorable for proceeding gasification reaction, cause the loss of carbon raw material.
In addition, as mentioned above, this process using high temperature pyrolysis remains high-strength microwave field in pyrolysis oven, makes to remain residual burnt material and only accounts for below 10%.
The most important is, in pyrolysis oven bottom, utilize microwave and plasmon coupling principle to form high energy, high reactivity secondary ion field, and pyrolysis oven bottom is accumulated and is had slag bath, large quantity research shows, the basic metal material that in biomass slag, content is higher plays obvious katalysis to fuel reaction, thereby has accelerated the mass transfer chemical reaction that gas-solid-liquid three is alternate, has improved transformation efficiency, and shortened the reaction times, biomass fuel is converted into synthetic gas completely.
The utility model major advantage is:
1: pyrolysis oven system adopts microwave and plasma coupling pyrolytic technique, and heat-processed, without thermal inertia, adopts the pyrolysis of high temperature ionic state, complete and the combustiblecomponents of pyrolysis is all converted into synthetic gas, and efficiency is high, and efficiency of carbon conversion is high, synthetic gas quality better, the long-pending content of available gas reaches more than 90%.
2: pyrolysis oven feeding part adopts pressurized operation by the pulsed feeding system that pressurizes, and single stove processing power is large, in later use process, without compressor, saves in a large number compression work, reduces system energy consumption.
3: in synthetic gas, without tar, follow-up purification process is simple, non-environmental-pollution.
4: adopt close phase static pressure to carry, biomass material size is without undue fragmentation, good economy performance.
Accompanying drawing explanation
Fig. 1 is the manifold type biomass pressurized pyrolysis furnace system structural representation of implementing according to the utility model;
Wherein: pulsed feeding system 1; Pyrolysis oven 2; Slag lock 3; Cyclonic separator 4; Ash lock 5; Refrigerating unit 6; Refining plant 7; Decarbonizing tower 8; Supply pipe 11; Feeding controller 10; Feed compressor 9; Microwave entrance 12; Plasmatorch 13; Syngas outlet 14; Pyrolysis oven controller 15; Biomass fuel 16; Feed delivering gas 17; Feed sealing air 18; Slag 19; Flying dust 20; Carbon dioxide 21; Finished product gas 22.
Embodiment
Rice husk take below as example, in conjunction with schema one, introduce the concrete structure of manifold type biomass pressurized pyrolysis furnace system of the present utility model.
A kind of manifold type biomass pressurized pyrolysis furnace system as shown in Figure 1, comprises pyrolysis oven 2, pulsed feeding system 1, cyclonic separator 4; Pyrolysis oven 2 tops arrange high-temperature synthesis gas outlet 14, and stage casing arranges both sides material inlet, and bottom arranges a plurality of microwave entrances 12 and plasmatorch 13 interfaces, and bottom arranges holds slag bath, holds slag bath and is arranged with slag-drip opening; The microwave entrance 12 of pyrolysis oven and plasmatorch 13 interfaces adopt the even interval of multi-layer annular to arrange; It is characterized in that: below single microwave power 300kw; Plasmatorch 13 interfaces are placed under microwave entrance 12 and hold on slag bath liquid level face, and within the plasma jet direction of plasmatorch interface is positioned at the microwave field scope of microwave entrance;
Pulsed feeding system 1 is connected by supply pipe 11 with pyrolysis oven material inlet, and pulsed feeding system 1 is with feed conveying gas pipeline communication and feeding controller is set carries out on-off control; Pyrolysis oven top syngas outlet is connected with cyclonic separator, and pyrolysis oven bottom slag-drip opening is connected with slag lock 3, and cyclonic separator 4 ash output holes are connected with ash lock 5, and cyclonic separator 4 is connected with refrigerating unit 6, and refrigerating unit 6 is connected with refining plant 7; High-temperature synthesis gas circulation chilling device is set between pyrolysis oven top syngas outlet 14 and cyclonic separator 4.
By technique scheme, the outer series connection of pyrolysis oven 2 bottom of furnace body slag-drip openings arranges at least two-stage slag lock 3; The outer series connection of cyclonic separator 4 bottom deslagging mouths arranges at least two-stage ash lock.
By technique scheme, decarbonizing tower 8 is also set after refining plant 7; The feed conveying gas pipeline communication of the outlet of decarbonizing tower carbon dioxide and pulsed feeding system 1.
By technique scheme, described pyrolysis oven 2 integral body are round tube type, and furnace outer wall adopts steel to make, and inwall is that refractory brick is piled up or adopts water wall structure.
Concrete reaction process is as follows:
1) first rice husk passes through fragmentation, screening is processed into and is less than 3mm size, then rice husk 16 is by pulsed feeding system 1, pulsed feeding system 1 adopts compressor 9 by 17 pressurizations of feed delivering gas, after pressurization, gas is delivered to feed hopper top, bottom material seeding air distribution plate and pulse air knife valve place, by feeding controller 10, control the keying of each pipeline valve, making rice husk in supply pipe 11, be material bolt formula static pressure carries, at feed material bolt and vapourizing furnace ingress, adopt the delivering gas 17 of a road compression to carry as feed sealing air 18, sealing air can play cooling pyrolysis stove material inlet on the one hand, avoid the generation of material inlet slagging failure, utilize on the other hand sealing air to carry out transfer the fuel at nozzle kinetic energy, avoid congestion, the generation of bridging accident.
2) rice husk 16 enters in pyrolysis oven 2, and in the up flue gas of high temperature and stove, under the effect of high-strength micro-wave energy, wink-dry, division also heat up rapidly.Inside and outside synchronous intensification of particle after rice husk absorption microwave, heat effect does not have thermal inertia, this type of heating is different from heat and from particle outer wall, is passed to the type of heating of granule interior, thereby granular fuel is played to good activation, improved pyrolytic reaction speed, make into stove artifact matter fuel, can most of pyrolysis become biomass synthesis gas at short notice, synthetic gas main component CO, CH
4, H
2, also have a small amount of CO
2, H
2o etc., this technique, without oxygenant or vaporized chemical, is utilized biomass fuel characteristic, by the reaction of fuel pyrolyzing, is generated completely.
3) (this bed consists of the carbon residue material after biomass fuel thermal decomposition completely after rice husk thermal decomposition, to remain the residual burnt material formation fixed bed of lime-ash and small part, reactive behavior is very low, be difficult for after-flame), fixed bed moves down, at fixed bed bottom plasma torch 13, produce high-temperature plasma air-flow to residual burnt class material high-temperature gasification, plasma state high temperature gas flow is under the effect of high-strength microwave field electromagnetic coupled, charged ion activity quotient is higher, reactivity is stronger, makes carbonaceous material be converted into high-temperature synthesis gas completely.Synthetic gas is up provides heat energy to fixed bed, is the top pyrolytic reaction gas CO that supplies raw materials simultaneously
2; Non-carbonaceous material continues the descending lime-ash that becomes.Under hot environment, lime-ash is in a liquid state, and accumulates and form slag bath in bottom, and liquid slag regularly or is continuously discharged to maintain slag position, and liquid slag, after the slag lock 3 with water-cooled or water Quench, is carried out recycle under normal temperature state.
4) high-temperature synthesis gas is drawn from pyrolysis oven 2 syngas outlet 14, enter high temperature cyclone separator 4, in the pipeline that enters cyclonic separator 4, adopt circulation synthetic gas Quench mode that ash temperature in synthetic gas is reduced to below ash fusion point, the flying dust 20 being separated by cyclonic separator enters ash lock 5, synthetic gas after separation enters refrigerating unit 6 subsequently, adopts the equipment such as quenching column or useless pot to reduce synthetic gas temperature.
5) after cooling, synthetic gas enters refining plant 7 subsequently, removes obnoxious flavour impurity in synthetic gas, and refining plant 7 also comprises the required conversion tower of transformationreation, the conversion process of the synthetic gas that is rich in saturation steam particularly being produced by chilling technology simultaneously.
6) as distributing rationally, decarbonizing tower 8 is set after refining plant 7, carbon dioxide in synthetic gas 21 is removed, finished product gas 22 calorific values after upgrading are higher like this, quality is better.Carbon dioxide 21 can be used as feed conveying gas 17 and uses.
Fuel is without undue fragmentation, and particle size, below 10mm, is preferably below 3mm, without undue fragmentation.Fuel should be dried as far as possible, and high moisture fuel affects synthetic gas quality and system energy consumption, preferably can adopt waste heat to carry out drying fuel.
Feed delivering gas 17 is the delivery mediums such as carbon dioxide, nitrogen or steam, can, by carbon dioxide 21 Returning utilizations of decarbonizing tower 8 rear generations, also can utilize the high-temperature synthesis gas after pyrolysis.
The microwave entrance 12 of pyrolysis oven 2 adopts and is circular layout, and can arrange according to fuel characteristic multilayer, below single microwave power 300kw.The synthetic gas high-temperature zone residence time is 8～15s.In stove, absolute pressure can be carried out determining of economy according to later use technique, is preferably 0.1Mpa～5Mpa.
Plasmatorch 13 mainly provides high temperature heat source, and maintains certain liquid slag slag position, bottom, and the heat storage capacity of liquid slag bath has played the stable effect of inner operating that maintains.Plasmatorch working gas is the synthetic gas 22 after purifying and or carbon dioxide 21 and or water vapor and or oxygen.
In unit time, microwave and plasmatorch total input energy account for 15%～30% of input fuel total energy, and when wherein electric energy adopts solar electrical energy generation, cogeneration or electrical network peak valley, electric energy, to reduce energy cost, improves the economy of technique at a low price.Especially, when plasma working gas adopts oxygen, there is violent burning thermopositive reaction in the residual burnt class material in oxygen and bottom, for whole pyrolytic reaction provides heat energy, residual burnt quality accounts for fuel mass below 10%, and now to consume total electric energy be between fuel total energy 5%～10% for microwave and plasmatorch.
Pyrolysis reaction temperature is more than 1100 ℃, and bottom high temperature slag bath maintains 1300 ℃～2000 ℃, is preferably 1400 ℃～1600 ℃, to high ash melting point fuel, can add the fusing assistants such as Wingdale, reduces the melting temperature of slag.
Because pyrolysis operating mode is complicated, Traditional Man operating method cannot meet the operational requirement of manifold type pyrolytic process, thereby realizes synthetic temperature degree, microwave power, plasma power, the isoparametric control in slag position by pyrolysis oven controller 15 is set.
It is 600 ℃～850 ℃ that temperature range is controlled to the chill zone of 4 circulation Quench of high temperature cyclone separator in preferential pyrolysis oven top.
The above is preferred embodiments of the present utility model; not to the restriction in any pattern of the utility model; every the art of this patent content that do not depart from, modification, equivalent variations and the modification above example carried out according to the technical spirit of this patent, all belong within the scope of the utility model rights protection.
Claims (4)
1. a manifold type biomass pressurized pyrolysis furnace system, comprises pyrolysis oven, pulsed feeding system, cyclonic separator; Pyrolysis oven top arranges high-temperature synthesis gas outlet, and stage casing arranges both sides material inlet, and bottom arranges a plurality of microwave entrances and plasmatorch interface, and bottom arranges holds slag bath, holds slag bath and is arranged with slag-drip opening; The microwave entrance of pyrolysis oven and plasmatorch interface be all arranged to multilayer and every layer all evenly interval arrange;
It is characterized in that plasmatorch interface is placed under microwave entrance holds on slag bath liquid level face, and within the plasma jet direction of plasmatorch interface is positioned at the microwave field scope of microwave entrance; Below the single microwave power 300kw of microwave entrance;
Pulsed feeding system is connected by carrying path with pyrolysis oven material inlet, and carrying path and feed conveying gas pipeline communication also arrange feeding controller and carry out on-off control; Pyrolysis oven top syngas outlet is connected with cyclonic separator, pyrolysis oven bottom slag-drip opening and the phase-locked company of slag, and cyclonic separator ash output hole and grey phase-locked company, cyclonic separator is connected with refrigerating unit, and refrigerating unit is connected with refining plant; High-temperature synthesis gas circulation chilling device is set between pyrolysis oven top syngas outlet and cyclonic separator.
2. manifold type biomass pressurized pyrolysis furnace system according to claim 1, is characterized in that: the outer series connection of slag-drip opening of pressurized pyrolysis furnace body bottom arranges at least two-stage slag lock; The outer series connection of cyclonic separator bottom deslagging mouth arranges at least two-stage ash lock.
3. manifold type biomass pressurized pyrolysis furnace system according to claim 1 and 2, is characterized in that: decarbonizing tower is also set after refining plant; The feed conveying gas pipeline communication of the outlet of decarbonizing tower carbon dioxide and pulsed feeding system.
4. manifold type biomass pressurized pyrolysis furnace system according to claim 1 and 2, is characterized in that: described pyrolysis oven integral body is round tube type, and furnace outer wall adopts steel to make, and inwall is that refractory brick is piled up or adopts water wall structure.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109852426A (en) * | 2019-02-01 | 2019-06-07 | 中国科学技术大学 | A kind of rotary continuous pressurization feeding device and method of biomass |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109852426A (en) * | 2019-02-01 | 2019-06-07 | 中国科学技术大学 | A kind of rotary continuous pressurization feeding device and method of biomass |
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