CN107916141A - Biomass and low order coal gasification flashing speed oven classified utilization method - Google Patents
Biomass and low order coal gasification flashing speed oven classified utilization method Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/58—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels combined with pre-distillation of the fuel
- C10J3/60—Processes
- C10J3/64—Processes with decomposition of the distillation products
- C10J3/66—Processes with decomposition of the distillation products by introducing them into the gasification zone
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/58—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels combined with pre-distillation of the fuel
- C10J3/60—Processes
- C10J3/62—Processes with separate withdrawal of the distillation products
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/0916—Biomass
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/093—Coal
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0959—Oxygen
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0973—Water
- C10J2300/0976—Water as steam
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1603—Integration of gasification processes with another plant or parts within the plant with gas treatment
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Abstract
The present invention relates to biomass and low order coal gasification flashing speed oven classified utilization method, mainly solve that prior art tar yield is low, low-order coal is difficult to be utilized and to heat carrier the problems such as depending on unduly.The present invention is mainly included the following steps that by using the combination of gasification preparing synthetic gas and flashing speed oven tar technology：The mixture of low-order coal and biomass enters pyrolysis oven by charging gear, is heated by the high temperature circulation semicoke from gasification furnace, and flashing speed oven is carried out under high linear speed, separates out volatile matter, and obtain semicoke；By gas-solid separating device, volatile matter is admitted to tar product of the acquisition based on bio-oil after condenser rapid condensation, and semicoke is admitted to gasification furnace and is reacted with gasifying agent, generates synthesis gas and high temperature circulation semicoke；After separation, synthesis gas is cleaned via purifier again, processes and is used as industrial chemicals, and high temperature circulation semicoke is admitted to pyrolysis oven and continues as raw material and provide heat being pyrolyzed, available for technical field of coal chemical industry.
Description
Technical field
The invention belongs to biomass and coal pyrolytic gasified classified utilization technical field, and in particular to biomass and low order coal gas
The method that change-flashing speed oven classified utilization realizes synthesis gas and tar coproduction.
Background technology
China is a country using coal as main energy resource structure, will not be changed in the future for a long period of time, according to
Count, in the primary energy consumption structure in China, coal has reached 66%.It is increasingly in short supply with petroleum resources, efficiently use
Coal resources have become a strategy of China's energy sustainable development.China's low order coal reserves accounts for the 55% of coal resources total amount
More than, but its moisture content is high, degree of coalification is low, and the efficiency directly burnt is low, and not only waste of resource but also pollution environment, cause
Acid rain, PM2.5, and the discharge of SOx and NOx isothermal chamber gases.Therefore, by reduce pollute for the purpose of coal conversion technology by
Great attention is arrived.In numerous coal utilization technologies, coal gasification is the basic technology of Coal Energy Source conversion, and coalification
Most important technical process in work development.The efficient clean utilization for realizing coal is the pass that China realizes energy sustainable development
Key, and solve the effective way of the global energy faced and environmental problem.
The carbohydrate that biomass mainly has photosynthesis of plant to fix solar energy and formed, has widely distributed, storage
Measure it is huge, environmental-friendly, especially greenhouse gases zero-emission the features such as, and be that can uniquely be converted into gas, liquid at the same time
With the renewable resource of solid fuel.Compared to coal, its structure is more loose, and the content of the element such as hydrogen, oxygen is also higher, and pyrolysis can
Hydrogen-rich gas or abundant tar are produced, and the gasification reactivity of biomass is also of a relatively high.It is reported that biomass and coal
Altogether during gasification or copyrolysis, also there are certain synergistic effect, therefore, gasification is not only gram with coal copyrolysis or altogether for biomass
Taken both individually some problems in gasification or pyrolytic process, and improved the efficiency of gasification or pyrolysis, be it is a kind of very
Economic, environmental protection energy utilization patterns.
Coal or gasification of biomass preparing synthetic gas, and then can synthesize a variety of chemical products (such as methanol, ethene, propylene
Deng), it is the technology for most developing scene in thermochemical study technology.In addition biomass flash is pyrolyzed, and can obtain substantial amounts of life
Material oil, can reduce the pollution to environment and improve the utilization double effects of resource, research finds that bio-oil is fabulous liquid
Fluid fuel and chemical products raw material, therefore, biomass liquefaction technology have been affected by extensive concern.
Traditional biomass or coal gasification process for preparing synthetic gas, generally use air-steam, air, air-titanium dioxide
Carbon etc. is used as gasifying medium, carries out gasification reaction with raw material under hot conditions, so as to obtain synthesis gas, it can guarantee that continuous life
While production, and treatment effeciency is higher.But it is mingled with tar due in the gas of generation more, follow-up equipment is generally required to handle
The problems such as tar and reformation synthesizer, cause cumbersome, flow complexity.And traditional biomass flash pyrolysis oil preparation is typically
Finger is pyrolyzed under conditions of the complete anoxic of biomass or oxygen-limited condition, its thermal decomposition product is finally condensed based on condensable gases
Become bio-oil, its oil-producing technique process is simple, liquid product yield is high, but need in the technical process supporting heat source with
For the heat needed for raw material pyrolysis.The materials such as the grains of sand after generally use heating in the prior art are former as heat carrier, supply
Heat needed for material pyrolysis.But the addition of heat carrier, cost of material is not only increased, while also handle band to later separation
Many difficulties are carried out so that the operation of whole technological process becomes cumbersome, and exists and cause abrasion, power consumption big to equipment etc.
Problem.
To solve the difficulty in above-mentioned traditional handicraft, Chinese invention patent CN102504842A proposes a kind of pyrolysis-gas
Three fluidized bed plant of change-burning, it is intended to realize synthesis gas-tar coproduction, but the technique pyrolysis installation uses bubbling bed reactor,
Residence time destribution is wide in the reactor for middle low-order coal, and the residence time is longer, reduces the selection to target product tar
Property, it is unfavorable for the generation of high-quality tar.Tokyo Univ Japan (Chemical Engineering Journal, 164 (2010)
221-229；Chemical Engineering Science, 66 (2011) 4212-4220) propose gasification and pyrolysis classified utilization
Technique, realizes the accurate control to pyrolysis time, while pyrolysis gas-solid product separation is realized before gasification furnace, avoids and waves
Hair divides the inhibitory action to char Gasification preparing synthetic gas, but the technique uses quartz sand to cause equipment serious as heat-carrying material
Abrasion.
Although existing pyrolysis-gasification classified utilization technology solve to a certain extent tradition gasification preparing synthetic gas and
The shortcomings that pyrolysis oil preparation, but since technological process limits, cause the yield of tar substantially to reduce, or due to additional heat carrier
Reason, causes the problems such as energy consumption is excessive, equipment is impaired to occur.Therefore, tar yield, reasonable utilization or letter how to be further improved
Change heat carrier, realize development key of the synthesis gas-tar coproduction truly as pyrolysis-gasification classified utilization technology.
The content of the invention
Technical problem solved by the invention is the defects of overcoming the prior art, there is provided one kind is suitable for biomass and low order
The gasification that coal efficiently utilizes-pyrolysis classified utilization method, simplifies dependence of the prior art to heat carrier, and substantially increase
The yield of tar, realizes synthesis gas-tar coproduction.
To solve technical problem, the present invention provides a kind of biomass and low order coal gasification-flashing speed oven classified utilization side
Law technology scheme is as follows：
A kind of biomass and low order coal gasification-flashing speed oven classified utilization method, it is characterised in that raw material A biomass and coal
Mixture pyrolysis oven 1 is entered by feeding device, and mixed with the high temperature circulation semicoke particle from gasification furnace 4, raw material quilt
Heat entrained by high temperature circulation semicoke particle quickly heats, and under inert atmosphere B, realizes fast pyrogenation, separates out volatile matter
And generate pyrolysis char particle；Pyrogenous origin volatile matter and semicoke particle is separated by the first gas-solid separation equipment 2, its
Middle gas, which is admitted in condenser 3, carries out rapid condensation, and generates the high-quality tar based on bio-oil C, and is pyrolyzed half
Burnt particle is then admitted to gasification furnace 4 after separation, and gasification reaction occurs with gasifying agent D, forms substantial amounts of synthesis gas and high temperature
Circulate semicoke particle.The synthesis gas E and high temperature circulation semicoke particle of gasification generation are divided by the second gas-solid separation equipment 5
From wherein high temperature circulation semicoke particle then enters pyrolysis oven 1 after separation, and synthesis gas E is admitted to gas purification dress after separation
Industrial chemicals is used as after putting 6 purifications, processing.
The feed coal is biomass and the mixture of coal, and wherein feed coal is low order colm, and biomass starting material is
Draft or woody garden waste.
The feed coal and the mixture particle diameter of biomass are respectively less than 1mm, in favor of volatile matter during flashing speed oven
Release is thorough.
The feed coal and the quality proportioning of biomass are 2-4:10.
1 temperature of pyrolysis oven is 500-650 DEG C, and pressure is normal pressure.
The one kind of the inert atmosphere B in nitrogen or argon gas.
The pyrolysis oven 1 uses flashing speed oven technology, and linear speed is 20-30m/s in its stove, and particle is in residing time in furnace
0.60-1s。
Preferably, pyrolysis oven 1 uses flashing speed oven technology, and linear speed is 25-28m/s in its stove, when particle stops in stove
Between 0.7-0.8s.
In the biomass and low order coal gasification-flashing speed oven classified utilization method, volatile matter passes through the first gas-solid point
Become liquid from 3 rapid condensation of condenser is entered after equipment 2.To prevent the secondary pyrolysis of condensable gases generation from becoming can not be cold
Solidifying gas, therefore, condenser uses spraying condenser.
700-850 DEG C of 4 temperature of gasification furnace, pressure 4MPa-6.5MPa.
Gasifying agent is oxygen and the mixture of vapor in the gasification furnace 4, and wherein oxygen accounts for the 15-20% of total amount..
Advantages of the present invention brief introduction
Gasification and flashing speed oven are coupled in one by the present invention, are carried out flashing speed oven in pyrolysis oven, are carried out in gasification furnace
The gasification reaction of pyrolysis char particle, and thermophore is used as by the high temperature circulation semicoke particle after gasification, it is recycled into
Heat source in pyrolysis oven as flashing speed oven, reduces the energy consumption of the whole circulatory system, also saves the additional heat-carrying of traditional handicraft
The cost of body.The raw material of the circulatory system uses the mixture of low-order coal and biomass, and the rational proportion by both is ensuring coal
With cooperative effect of the biomass in pyrolysis and gasification, while improving efficiency of carbon con version (up to 98%), also solve low
The present situation that rank colm is difficult to be utilized.
Technical solution using the present invention passes through low-order coal and biomass mixture gasification and flashing speed oven classified utilization
Set, and pyrolysis oven high linear speed, particle are short stops, under the technique that quickly cools down of product gas, realize conjunction truly
Into gas and tar coproduction.Tar yield can be made to be up to 46% in product, effectively gas H in gas products2+CH4The content of+CO reaches
67%, and efficiency of carbon con version is up to 98%, while have the characteristics that the intensity of gasification is big, the high and low pollution of capacity usage ratio, largely
On reduce production cost, have a good application prospect.
Brief description of the drawings
Fig. 1 is the schematic diagram of biomass provided by the invention and low order coal gasification-flashing speed oven classified utilization.
In figure, 1- pyrolysis ovens；The first gas-solid separation equipments of 2-；3- condensers；4- gasification furnaces；The second gas solid separations of 5- are set
It is standby；6- gas cleaning plants.A- raw materials；B- inert atmospheres；C- bio-oils；D- gasifying agents；E- synthesis gas.
Embodiment
The features of the present invention is described in detail with reference to the accompanying drawings and examples.
【Embodiment 1】
It is 10 by biomass and lignite proportioning:2 mixture, is admitted to pyrolysis oven 1, with carrying out autopneumatolysis by feeding device
Stove 4 and the high temperature circulation semicoke particle mixing after the separation of the second gas-solid separation equipment 5, biomass starting material and low order colm
Mixture (particle diameter<1mm) heated rapidly by the heat entrained by high temperature circulation semicoke, pyrolysis devolatilization occurs in a nitrogen atmosphere
Divide reaction, generate pyrolysis gas and pyrolysis char.Pyrolysis gas and pyrolysis char are divided by the first gas-solid separation equipment 2
From wherein pyrolysis gas, which is admitted in condenser 3, carries out rapid condensation, and the control of pyrolysis oven running temperature is 500 DEG C, linear speed 30m/
s.Therefore, it is mostly condensable gases in pyrolysis gas, the high-quality tar based on bio-oil is obtained after rapid condensation, it is burnt
Oily yield is up to 44%.And pyrolysis char is admitted to gasification furnace 4 after separation, gasify with gasifying agent (oxygen+vapor)
Reaction, forms substantial amounts of synthesis gas and high temperature circulation semicoke.Gasifier operation temperature is by adjusting the oxygen content in gasifying agent
Control, when oxygen content control is 15% or so, gasifier operation temperature is 700 DEG C.The synthesis gas and high temperature of gasification generation follow
Ring semicoke is separated via the second gas-solid separation equipment 5 again, and wherein it is net to be sent into gas cleaning plant 6 after separation for synthesis gas
Change, processing.When gasifier operation pressure is 4.0MPa, its synthesis gas active principle H2, CO and CH4Content is respectively 42.3%,
18.9%th, 5.1%.And high temperature circulation semicoke then via the second gas-solid separation equipment 5 separate after be admitted in pyrolysis oven 1 continue with
The mixture of biomass starting material and coal carries out pyrolytic reaction, and since coal exists in pyrolysis and gasification reaction with biomass
Synergistic effect, the efficiency of carbon con version of whole circulating reaction system is up to 96%.
【Embodiment 2】
It is 10 by biomass and lignite proportioning:2 mixture, is admitted to pyrolysis oven 1, with carrying out autopneumatolysis by feeding device
Stove 4 and the high temperature circulation semicoke particle mixing after the separation of the second gas-solid separation equipment 5, biomass starting material and low order colm
Mixture (particle diameter<1mm) heated rapidly by the heat entrained by high temperature circulation semicoke, pyrolysis devolatilization occurs in a nitrogen atmosphere
Divide reaction, generate pyrolysis gas and pyrolysis char.Pyrolysis gas and pyrolysis char are divided by the first gas-solid separation equipment 2
From wherein pyrolysis gas, which is admitted in condenser 3, carries out rapid condensation, and the control of pyrolysis oven running temperature is 650 DEG C, linear speed 30m/
s.Therefore, it is mostly condensable gases in pyrolysis gas, the high-quality tar based on bio-oil is obtained after rapid condensation, it is burnt
Oily yield is up to 41%.And pyrolysis char is admitted to gasification furnace 4 after separation, gasified reverse occurs with gasifying agent (oxygen+vapor)
Should, form substantial amounts of synthesis gas and high temperature circulation semicoke.Gasifier operation temperature is by adjusting the oxygen content control in gasifying agent
System, when oxygen content control is 20% or so, gasifier operation temperature is 850 DEG C.Gasify the synthesis gas generated and high temperature circulation
Semicoke is separated via the second gas-solid separation equipment 5 again, wherein synthesis gas be sent into after separation gas cleaning plant 6 purify,
Processing.When gasifier operation pressure is 4.0MPa, its synthesis gas active principle H2, CO and CH4Content is respectively 39.9%,
20.1%th, 6.3%.And high temperature circulation semicoke then via the second gas-solid separation equipment 5 separate after be admitted in pyrolysis oven 1 continue with
The mixture of biomass starting material and coal carries out pyrolytic reaction, and since coal exists in pyrolysis and gasification reaction with biomass
Synergistic effect, the efficiency of carbon con version of whole circulating reaction system is up to 98%.
【Embodiment 3】
It is 10 by biomass and lignite proportioning:2 mixture, is admitted to pyrolysis oven 1, with carrying out autopneumatolysis by feeding device
Stove 4 and the high temperature circulation semicoke particle mixing after the separation of the second gas-solid separation equipment 5, biomass starting material and low order colm
Mixture (particle diameter<1mm) heated rapidly by the heat entrained by high temperature circulation semicoke, pyrolysis devolatilization occurs in a nitrogen atmosphere
Divide reaction, generate pyrolysis gas and pyrolysis char.Pyrolysis gas and pyrolysis char are divided by the first gas-solid separation equipment 2
From wherein pyrolysis gas, which is admitted in condenser 3, carries out rapid condensation, and the control of pyrolysis oven running temperature is 500 DEG C, linear speed 30m/
s.Therefore, it is mostly condensable gases in pyrolysis gas, the high-quality tar based on bio-oil is obtained after rapid condensation, it is burnt
Oily yield is up to 44%.And pyrolysis char is admitted to gasification furnace 4 after separation, gasified reverse occurs with gasifying agent (oxygen+vapor)
Should, form substantial amounts of synthesis gas and high temperature circulation semicoke.Gasifier operation temperature is by adjusting the oxygen content control in gasifying agent
System, when oxygen content control is 15%, gasifier operation temperature is 700 DEG C.Gasify the synthesis gas and high temperature circulation semicoke generated
Separated again via the second gas-solid separation equipment 5, wherein synthesis gas is sent into gas cleaning plant 6 after separation and purifies, processes.
When gasifier operation pressure is 6.5MPa, its synthesis gas active principle H2, CO and CH4Content is respectively 37.5%, 20.9%,
8.3%.And high temperature circulation semicoke is admitted in pyrolysis oven 1 after then being separated via the second gas-solid separation equipment 5 and continues to give birth to raw material
The mixture of material and coal carries out pyrolytic reaction, and cooperates with work since coal exists with biomass in pyrolysis and gasification reaction
With the efficiency of carbon con version of, whole circulating reaction system up to 96%.
【Embodiment 4】
It is 10 by biomass and lignite proportioning:4 mixture, is admitted to pyrolysis oven 1, with carrying out autopneumatolysis by feeding device
Stove 4 and the high temperature circulation semicoke particle mixing after the separation of the second gas-solid separation equipment 5, biomass starting material and low order colm
Mixture (particle diameter<1mm) heated rapidly by the heat entrained by high temperature circulation semicoke, pyrolysis devolatilization occurs in a nitrogen atmosphere
Divide reaction, generate pyrolysis gas and pyrolysis char.Pyrolysis gas and pyrolysis char are divided by the first gas-solid separation equipment 2
From wherein pyrolysis gas, which is admitted in condenser 3, carries out rapid condensation, and the control of pyrolysis oven running temperature is 500 DEG C, linear speed 30m/
s.Therefore, it is mostly condensable gases in pyrolysis gas, the high-quality tar based on bio-oil is obtained after rapid condensation, it is burnt
Oily yield is up to 37%.And pyrolysis char is admitted to gasification furnace 4 after separation, gasify with gasifying agent (oxygen+vapor)
Reaction, forms substantial amounts of synthesis gas and high temperature circulation semicoke.Gasifier operation temperature is by adjusting the oxygen content in gasifying agent
Control, when oxygen content control is 15% or so, gasifier operation temperature is 700 DEG C.The synthesis gas and high temperature of gasification generation follow
Ring semicoke is separated via the second gas-solid separation equipment 5 again, and wherein it is net to be sent into gas cleaning plant 6 after separation for synthesis gas
Change, processing.When gasifier operation pressure is 4.0MPa, its synthesis gas active principle H2, CO and CH4Content is respectively 40.9%,
19.8%th, 5.2%.And high temperature circulation semicoke then via the second gas-solid separation equipment 5 separate after be admitted in pyrolysis oven 1 continue with
The mixture of biomass starting material and coal carries out pyrolytic reaction, and since coal exists in pyrolysis and gasification reaction with biomass
Synergistic effect, the efficiency of carbon con version of whole circulating reaction system is up to 95%.
【Embodiment 5】
It is 10 by biomass and lignite proportioning:2 mixture, is admitted to pyrolysis oven 1, with carrying out autopneumatolysis by feeding device
Stove 4 and the high temperature circulation semicoke particle mixing after the separation of the second gas-solid separation equipment 5, biomass starting material and low order colm
Mixture (particle diameter<1mm) heated rapidly by the heat entrained by high temperature circulation semicoke, pyrolysis devolatilization occurs in a nitrogen atmosphere
Divide reaction, generate pyrolysis gas and pyrolysis char.Pyrolysis gas and pyrolysis char are divided by the first gas-solid separation equipment 2
From, wherein pyrolysis gas, which is admitted in condenser 3, carries out rapid condensation, pyrolysis oven running temperature control be 500 DEG C, use linear speed for
25m/s.Therefore, it is mostly condensable gases in pyrolysis gas, the high-quality tar based on bio-oil is obtained after rapid condensation,
Its tar yield is up to 46%.And pyrolysis char is admitted to gasification furnace 4 after separation, occur with gasifying agent (oxygen+vapor)
Gasification reaction, forms substantial amounts of synthesis gas and high temperature circulation semicoke.Gasifier operation temperature is by adjusting the oxygen in gasifying agent
Content controls, and when oxygen content control is 15% or so, gasifier operation temperature is 700 DEG C.Gasify the synthesis gas and height generated
Temperature circulation semicoke is separated via the second gas-solid separation equipment 5 again, and wherein synthesis gas is sent into gas cleaning plant 6 after separation
Purification, processing.When gasifier operation pressure is 4.0MPa, its synthesis gas active principle H2, CO and CH4Content is respectively
41.6%th, 18.7%, 5.1%.And high temperature circulation semicoke is admitted to pyrolysis oven 1 after then being separated via the second gas-solid separation equipment 5
Middle continuation carries out pyrolytic reaction with the mixture of biomass starting material and coal, and since coal and biomass are in pyrolysis and gasification reaction
In there is synergistic effect, the efficiency of carbon con version of whole circulating reaction system is up to 96%.
【Comparative example 1】
It is 10 by biomass and lignite proportioning:2 mixture, is admitted to pyrolysis oven 1, with carrying out autopneumatolysis by feeding device
Stove 4 and the high temperature circulation semicoke particle mixing after the separation of the second gas-solid separation equipment 5, biomass starting material and low order colm
Mixture (average grain diameter 3mm) is heated rapidly by the heat entrained by high temperature circulation semicoke, is pyrolyzed in a nitrogen atmosphere
Devolatilization reacts, and generates pyrolysis gas and pyrolysis char.Pyrolysis gas and pyrolysis char by the first gas-solid separation equipment 2 into
Row separation, wherein pyrolysis gas, which is admitted in condenser 3, carries out rapid condensation, and the control of pyrolysis oven running temperature is 500 DEG C, and linear speed is
30m/s.Therefore, it is mostly condensable gases in pyrolysis gas, the high-quality tar based on bio-oil is obtained after rapid condensation,
Its tar yield is up to 29%.And pyrolysis char is admitted to gasification furnace 4 after separation, occur with gasifying agent (oxygen+vapor)
Gasification reaction, forms substantial amounts of synthesis gas and high temperature circulation semicoke.Gasifier operation temperature is by adjusting the oxygen in gasifying agent
Content controls, and when oxygen content control is 15% or so, gasifier operation temperature is 700 DEG C.Gasify the synthesis gas and height generated
Temperature circulation semicoke is separated via the second gas-solid separation equipment 5 again, and wherein synthesis gas is sent into gas cleaning plant 6 after separation
Purification, processing.When gasifier operation pressure is 4.0MPa, its synthesis gas active principle H2, CO and CH4Content is respectively
42.3%th, 18.9%, 5.1%.And high temperature circulation semicoke is admitted to pyrolysis oven 1 after then being separated via the second gas-solid separation equipment 5
Middle continuation carries out pyrolytic reaction with the mixture of biomass starting material and coal, and since coal and biomass are in pyrolysis and gasification reaction
In there is synergistic effect, the efficiency of carbon con version of whole circulating reaction system is up to 90%.
【Comparative example 2】
Using traditional pressurization static bed gasification installation of lurgi gasifier, raw material uses particle diameter as 5-30mm lignite, operating pressure
For 3.0MPa, gasification temperature is 850 DEG C, linear speed<1.5m/s, CO+H in exit gas component2Content is 61.0%, methane content
For 8.3%, although gasification can also obtain a certain amount of tar product, its yield is only 11%, and efficiency of carbon con version is only 90%.
【Comparative example 3】
The pyrolytic gasification combined unit proposed using Institute of Engineering Thernophysics, Academia Sinica, raw material use particle diameter<1mm
Stalk, gasification temperature be 900 DEG C, vapor pressure 4.0MPa, pyrolysis temperature be 850 DEG C, linear speed<10m/s, exit gas group
CO+H in point2Content is 58.4%, methane content 7.0%, efficiency of carbon con version 95%, but tar yield is only 20%.
Claims (9)
1. biomass and low order coal gasification-flashing speed oven classified utilization method, it is characterised in that raw material (A) biomass and coal it is mixed
Compound enters pyrolysis oven (1) by feeding device, and is mixed with the high temperature circulation semicoke particle from gasification furnace (4), raw material quilt
Heat entrained by high temperature circulation semicoke particle quickly heats, and under inert atmosphere (B), realizes fast pyrogenation, separates out volatilization
Divide and generate pyrolysis char particle；Pyrogenous origin volatile matter and semicoke particle is divided by the first gas-solid separation equipment (2)
From, wherein gas, which is admitted in condenser (3), carries out rapid condensation, and generates the high-quality tar based on bio-oil (C),
And pyrolysis char particle is then admitted to gasification furnace (4) after separation, and gasification reaction occurs with gasifying agent (D), formed substantial amounts of
Synthesis gas and high temperature circulation semicoke particle；The synthesis gas (E) and high temperature circulation semicoke particle of gasification generation pass through the second gas-solid point
Separated from equipment (5), wherein high temperature circulation semicoke particle then enters pyrolysis oven (1) after separation, and synthesis gas (E) is through separation
After be admitted to gas cleaning plant (6) purification, processing after be used as industrial chemicals.
2. biomass according to claim 1 and low order coal gasification-flashing speed oven classified utilization method, it is characterised in that：
Raw material is coal and the mixture of biomass, and feed coal is low order colm, and biomass starting material is discarded for draft or woody gardens
Thing.
3. biomass according to claim 1 and low order coal gasification-flashing speed oven classified utilization method, it is characterised in that：
The quality proportioning of feed coal and biomass is 2-4:10.
4. biomass according to claim 1 and low order coal gasification-flashing speed oven classified utilization method, it is characterised in that：
Pyrolysis oven (1) temperature is 500-650 DEG C, and pressure is normal pressure, and atmosphere is nitrogen.
5. biomass according to claim 1 and low order coal gasification-flashing speed oven classified utilization method, it is characterised in that：
Pyrolysis oven (1) uses flashing speed oven technology, and linear speed is 20-30m/s in its stove, and particle is in residing time in furnace<1s.
6. biomass according to claim 1 and low order coal gasification-flashing speed oven classified utilization method, it is characterised in that：
Volatile matter enters condenser (3) rapid condensation afterwards by the first gas-solid separation equipment (2) becomes liquid；The condenser is using spray
Leaching formula condenser.
7. biomass according to claim 1 and low order coal gasification-flashing speed oven classified utilization method, it is characterised in that：
700-850 DEG C of gasification furnace (4) temperature, pressure 4MPa-6.5MPa.
8. biomass according to claim 1 and low order coal gasification-flashing speed oven classified utilization method, it is characterised in that：
Gasifying agent is oxygen and the mixture of vapor in the gasification furnace (4), and wherein oxygen accounts for the 15-20% of total amount.
9. biomass according to claim 1 and low order coal gasification-flashing speed oven classified utilization method, it is characterised in that：
Feed coal and the mixture particle diameter of biomass are respectively less than 1mm.
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