CN106045805A - Method and system for preparing benzene by biomass pyrolysis - Google Patents

Method and system for preparing benzene by biomass pyrolysis Download PDF

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Publication number
CN106045805A
CN106045805A CN201610595985.6A CN201610595985A CN106045805A CN 106045805 A CN106045805 A CN 106045805A CN 201610595985 A CN201610595985 A CN 201610595985A CN 106045805 A CN106045805 A CN 106045805A
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China
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acetylene
benzene
pyrolysis
oil gas
biomass
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CN201610595985.6A
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Chinese (zh)
Inventor
窦从从
王培伦
郑倩倩
孟嘉乐
张照
吴道洪
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Beijing Shenwu Environmental and Energy Technology Co Ltd
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Beijing Shenwu Environmental and Energy Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
    • C07C2/02—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons
    • C07C2/42—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons homo- or co-oligomerisation with ring formation, not being a Diels-Alder conversion
    • C07C2/48—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons homo- or co-oligomerisation with ring formation, not being a Diels-Alder conversion of only hydrocarbons containing a carbon-to-carbon triple bond
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
    • C10B53/02—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
    • C10G1/002—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal in combination with oil conversion- or refining processes
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2521/00—Catalysts comprising the elements, oxides or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium or hafnium
    • C07C2521/18—Carbon
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/10—Feedstock materials
    • C10G2300/1011—Biomass
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/10—Biofuels, e.g. bio-diesel

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

The invention provides a method and a system for preparing benzene by biomass pyrolysis. The system comprises a rapid pyrolysis reactor, an acetylene storage device, a dedusting device, a cooling device and a benzene separation device. The rapid pyrolysis reactor is provided with an acetylene inlet and a pyrolysis oil gas outlet; the acetylene storage device is provided with an acetylene outlet which is connected with the acetylene inlet; the dedusting device is provided with a pyrolysis oil gas inlet and a dedusting oil gas outlet, and the pyrolysis oil gas inlet is connected with the pyrolysis oil gas outlet; the cooling device is provided with a dedusting oil gas inlet and a bio-oil outlet, and the dedusting oil gas inlet is connected with the dedusting oil gas outlet; the benzene separation device is provided with a bio-oil inlet and a benzene outlet, and the bio-oil inlet is connected with the bio-oil outlet. The method and the system for preparing benzene by biomass pyrolysis have advantages of low investment, simple process, high economic benefit and the like.

Description

A kind of biomass that are pyrolyzed prepare the system and method for benzene
Technical field
The invention belongs to biomass resource efficient technique of rainwater utilization field, be specifically related to a kind of be pyrolyzed that biomass prepare benzene be System and method.
Background technology
China's biomass resource is the abundantest, along with gradually decreasing of the fossil resource reserves such as oil, coal, low value is raw Physical resources carry out grade Upgrade and transform be bio oil and industrial chemicals to supplement and Substitute For Partial fossil feedstock, become biomass The important directions that can develop.Biomass pyrolytic technology can convert biomass into bio oil, charcoal and combustible gas, tool Hold out broad prospects and important social value.
Biomass pyrolytic is that biomass carry out high-temperature heating under an inert atmosphere, produces fuel gas, bio oil and solid The process of charcoal.Containing the compound that Various Complex is unstable in bio oil composition, there is arene content few, the feature that grade is low, Increasing the arene content in bio oil, the wherein content of benzene, to promoting, bio oil is former as fuel oil and chemical industry That expects is significant.
During biomass pyrolytic, its inside reactor is hot environment, and the pyrolytic carbon produced after biomass pyrolytic is permissible The catalyst of benzene is generated as acetylene reaction.Therefore, environment during biomass pyrolytic is especially suitable for acetylene and reacts generation benzene.
Summary of the invention
It is desirable to provide a kind of biomass that are pyrolyzed prepare the system and method for benzene.
According to an aspect of the present invention, a kind of biomass that are pyrolyzed prepare the system of benzene, it include fast pyrolysis reactor, Acetylene storage device, dust arrester, chiller and benzene segregation apparatus；
Described fast pyrolysis reactor is provided with acetylene entrance and pyrolysis oil gas vent；
Described acetylene storage device is provided with acetylene outlet, and the outlet of described acetylene is connected with described acetylene entrance；
Described dust arrester is provided with pyrolysis oil gas entrance and dedusting oil gas vent, described pyrolysis oil gas entrance and described pyrolysis Oil gas vent is connected；
Described chiller is provided with dedusting oil gas entrance and bio oil outlet, described dedusting oil gas entrance and described dedusting oil Gas outlet is connected；
Described benzene segregation apparatus is provided with bio oil entrance and benzene outlet, and described bio oil entrance exports phase with described bio oil Even.
In one embodiment of the invention, under described acetylene entrance is arranged in described fast pyrolysis reactor Portion.
In one embodiment of the invention, the heater of described fast pyrolysis reactor is heat accumulation type radiant tube combustion Burner, described regenerative radiant tube burner along the short transverse multilamellar of described fast pyrolysis reactor be arranged on described quickly On the sidewall of pyrolysis reactor, and radiant tube burner surface spraying ceramic coating.
In one embodiment of the invention, described fast pyrolysis reactor is additionally provided with discharging opening, and described system is also wrapped Including drawing mechanism, the entrance of described drawing mechanism is connected with described discharging opening.
According to another aspect of the present invention, present invention also offers one utilizes said system pyrolysis biomass to prepare benzene Method, described method comprises the steps:
Biomass are sent into described fast pyrolysis reactor be pyrolyzed, prepare pyrolysis oil gas and pyrolytic carbon, described pyrolysis Oil gas includes on-condensible gas and pyrolysis oil；
Being sent in described fast pyrolysis reactor by acetylene in described acetylene storage device, described acetylene does not coagulates described React in gas atmosphere and under the catalytic action of described pyrolytic carbon and generate benzene；
The pyrolysis oil gas comprising benzene is sequentially sent to described dust arrester and described chiller carries out dedusting and cooling, system Obtain bio oil；
Described bio oil is sent in described benzene segregation apparatus and separates, prepare benzene.
In one embodiment of the invention, the temperature of described biomass pyrolytic is 550-800 DEG C.
In one embodiment of the invention, the mean diameter of described biomass is 1-3mm.
In one embodiment of the invention, the moisture≤5wt% of described biomass.
In one embodiment of the invention, the consumption of described acetylene is the 5-10% of described on-condensible gas volume.
System and method provided by the present invention, is passed through acetylene in fast pyrolysis reactor, produces at biomass pyrolytic Methane, hydrogen and carbon dioxide atmosphere in, and biomass pyrolytic produce pyrolytic carbon catalytic action under, acetylene reaction Generate benzene.System and method provided by the present invention by biomass pyrolytic together with the reaction bonded of acetylene benzene, biomass It is pyrolyzed the reaction for acetylene benzene and provides required condition, saved energy consumption and also saved investment and operating cost, Er Qiegong Process flow is the simplest.
Additionally, system and method provided by the present invention also improves the content of aromatic hydrocarbons in biomass pyrolysis oil, make gained The quality of biomass pyrolysis oil get a promotion, it will be apparent that improve the economic worth of biomass pyrolysis oil.
Accompanying drawing explanation
Fig. 1 is that a kind of of the embodiment of the present invention is pyrolyzed the structural representation that biomass prepare the system of benzene.
Fig. 2 is that a kind of biomass that are pyrolyzed of the embodiment of the present invention prepare the schematic flow sheet of benzene.
Detailed description of the invention
Below in conjunction with drawings and Examples, the detailed description of the invention of the present invention is described in more details, in order to energy The advantage being enough more fully understood that the solution of the present invention and various aspects thereof.But, specific embodiments described below and enforcement Example is only descriptive purpose rather than limitation of the present invention.
Present invention firstly provides a kind of biomass that are pyrolyzed and prepare the system of benzene, this system include fast pyrolysis reactor, Acetylene storage device, drawing mechanism, dust arrester, chiller and benzene segregation apparatus.
Wherein, fast pyrolysis reactor is the core apparatus of native system, is the reactor of biomass pyrolytic, acetylene reaction. Fast pyrolysis reactor is provided with charging aperture, acetylene (C2H2) entrance, pyrolysis oil gas vent and discharging opening.
Acetylene entrance can be arranged on any position of fast pyrolysis reactor, and the position of its optimum is fast pyrogenation reaction The middle and lower part of device, optimal location is at the 30-50% of fast pyrolysis reactor height.At the same pressure, the density of acetylene Less than the density of air, acetylene enters in fast pyrolysis reactor from the bottom up, can produce pyrolytic carbon (C) with biomass pyrolytic and fill The contact divided, and the on-condensible gas (methane (CH produced at biomass pyrolytic4), hydrogen (H2), carbon dioxide (CO2) etc.) and atmosphere Enclose middle reaction and generate benzene.
The number of pyrolysis oil gas vent is not required to limit.
The heater of fast pyrolysis reactor need not be particularly limited to, and the heat accumulation type radiant tube that is chosen as of its optimum burns Device.Regenerative radiant tube burner can produce equally distributed temperature field, makes pyrolysis material thermally equivalent, with traditional use Heat carrier compares as the method for pyrolysis thermal source, is not required to arrange pyrolysis gas and carrier separative element, simplifies subsequent process flow. Regenerative radiant tube burner is arranged on fast pyrolysis reactor along the short transverse multilamellar of described fast pyrolysis reactor On sidewall, and radiant tube burner surface spraying ceramic coating.The quantity of regenerative radiant tube burner does not limits.
Acetylene storage device is provided with acetylene outlet, and acetylene outlet is connected with the acetylene entrance of fast pyrolysis reactor.Acetylene Storage device is for providing acetylene for fast pyrolysis reactor.
Drawing mechanism is provided with entrance and exit, and the entrance of drawing mechanism is connected with the discharging opening of fast pyrolysis reactor.Go out Material device is for sending fast pyrolysis reactor by the pyrolytic carbon produced after biomass pyrolytic.
Dust arrester is provided with pyrolysis oil gas entrance and dedusting oil gas vent, pyrolysis oil gas entrance and fast pyrolysis reactor Pyrolysis oil gas vent is connected.Dust arrester is for removing the dust in pyrolysis oil gas.
Chiller is provided with dedusting oil gas entrance and bio oil outlet, dedusting oil gas entrance and the dedusting oil gas of dust arrester Outlet is connected.Chiller is used for separating bio-oil and pyrolysis gas.
Benzene segregation apparatus is provided with bio oil entrance and benzene outlet, and bio oil entrance exports phase with the bio oil of chiller Even.Benzene segregation apparatus is used for from bio oil by benzene extraction out.
Present invention also offers a kind of method utilizing said system pyrolysis biomass to prepare benzene.As in figure 2 it is shown, this method Comprise the steps:
Pyrolysis: first, biomass are sent into fast pyrolysis reactor and is pyrolyzed, prepares pyrolysis oil gas and pyrolytic carbon, heat Solve oil gas and include on-condensible gas (such as methane, hydrogen, carbon dioxide etc.) and pyrolysis oil.Then, acetylene is stored the second in device Alkynes is sent in fast pyrolysis reactor, and acetylene reacts generation in on-condensible gas atmosphere and under the catalytic action of pyrolytic carbon Benzene.
Biomass enter fast pyrolysis reactor through charging aperture, then enter radial canal after distributing device is dispersed and add Thermal region carries out pyrolytic reaction.
The mean diameter of biomass used need not be particularly limited to.Generation pyrolytic carbon after biomass pyrolytic is in the present invention Being the catalyst of acetylene reaction, the particle diameter of biomass is the least, and the pyrolytic carbon particle diameter of pyrolysis gained is the least, and its specific surface area is more Greatly, catalytic effect is the best.But must be the least by biomass processing, required technique is the most complicated.Inventor finds through great many of experiments, raw It it is optimal conditions when the mean diameter of material is 1-3mm.
The moisture of biomass used need not be particularly limited to.Inventor finds through great many of experiments, biomass used Optimum moisture≤5wt%.
Flow up after the acetylene entrance fast pyrolysis reactor that acetylene entrance is passed through, contact with the pyrolytic carbon generated, Under the catalytic action of pyrolytic carbon, acetylene reacts, and generates benzene.
Acetylene generates the reaction of benzene to be needed just can carry out under conditions of high temperature and catalyst exist, fast pyrolysis reactor When being pyrolyzed biomass, its internal exactly hot environment, and also the pyrolytic carbon produced after biomass pyrolytic can be as acetylene Reaction generates the catalyst of benzene.
Acetylene is generating while benzene, reaction of self also decomposing:
Above-mentioned reaction is reversible reaction.Containing methane, hydrogen in the on-condensible gas produced after biomass pyrolytic, therefore can be Suppression acetylene is decomposed reaction to a certain extent.Additionally, possibly together with titanium dioxide in the on-condensible gas produced after biomass pyrolytic Carbon, carbon dioxide can not only regulate the dividing potential drop of methane, and carbon dioxide also has the charcoal generated with decomposition and reacts the merit eliminating carbon distribution Energy.
Reaction temperature is not required to be particularly limited to.Temperature is the highest, and the speed of pyrolysis of coal is the fastest, and acetylene self occurs addition anti- The benzene that should generate is more, but energy consumption is the biggest；Temperature is the lowest, and pyrolysis rate is the slowest, and the reaction effect of acetylene is poor.Inventor passes through Great many of experiments finds, 550-800 DEG C is the optimal reaction temperature of reaction zone.
The consumption of acetylene is not required to be particularly limited to.The acetylene being passed through fast pyrolysis reactor is too many, and its reaction is incomplete, And if very little, the content of benzene is also corresponding little in the pyrolysis oil prepared, being unsatisfactory for the purpose of the present invention.Inventor is through a large amount of real Issuing after examination and approval existing, the 5-10% of the on-condensible gas volume produced after the consumption form biomass pyrolysis of acetylene is optimal.
Dedusting: enter in dust arrester by the pyrolysis oil pneumatic transmission comprising benzene, removes the dust in pyrolysis oil gas.
Cooling: the pyrolysis oil gas after dedusting is re-fed into chiller and cools down, prepares bio oil.
Separate: bio oil is sent into benzene segregation apparatus and separates, prepare benzene.
Below with reference to specific embodiment, the present invention will be described.In following embodiment, institute's taking technique condition value is Exemplary, its desirable numerical range is as shown in foregoing summary.Method of testing used by following embodiment is one's own profession Method of testing conventional in industry.
Embodiment 1
The present embodiment provides a kind of biomass that are pyrolyzed to prepare the system of benzene.
As it is shown in figure 1, native system includes feed arrangement, fast pyrolysis reactor, drawing mechanism, acetylene storage device, removes Dirt device, chiller and benzene segregation apparatus.
Fast pyrolysis reactor is provided with charging aperture, acetylene entrance, pyrolysis oil gas vent and discharging opening.
Acetylene entrance is arranged on the sidewall adjacent with regenerative radiant tube burner, and it is high to be positioned at fast pyrolysis reactor At the 30% of degree.Pyrolysis oil gas vent and acetylene entrance are on identical sidewall, and are positioned at acetylene entrance top.Pyrolysis oil gas goes out The number of mouth is not required to limit, and the present embodiment is provided with two pyrolysis oil gas vents, and one is positioned at fast pyrolysis reactor height 80% at, one is positioned at the 40% of fast pyrolysis reactor height.Regenerative radiant tube burner is anti-along fast pyrogenation The short transverse multilamellar answering device is arranged on the sidewall of fast pyrolysis reactor, and radiant tube burner surface spraying has pottery painting Layer.Fast pyrolysis reactor is provided with distributing device.
Feed arrangement is connected with charging aperture, for biomass being sent in fast pyrolysis reactor.
Drawing mechanism is connected with discharging opening, for the pyrolytic carbon produced after biomass pyrolytic is sent fast pyrogenation reaction Device.
Acetylene storage device is provided with acetylene outlet, and acetylene outlet is connected with acetylene entrance.Acetylene storage device is used for storing Acetylene, and acetylene is sent in fast pyrolysis reactor.
Dust arrester is provided with pyrolysis oil gas entrance and dedusting oil gas vent, pyrolysis oil gas entrance and fast pyrolysis reactor Pyrolysis oil gas vent is connected.Dust arrester is for removing the dust in pyrolysis oil gas.
Chiller is provided with dedusting oil gas entrance and bio oil outlet, dedusting oil gas entrance and the dedusting oil gas of dust arrester Outlet is connected.Chiller is used for separating bio-oil and pyrolysis gas.
Benzene segregation apparatus is provided with bio oil entrance and benzene outlet, and bio oil entrance exports phase with the bio oil of chiller Even.Benzene segregation apparatus is used for from bio oil by benzene extraction out.
Embodiment 2
The present embodiment provides a kind of system utilizing embodiment 1 to be provided pyrolysis method that biomass prepare benzene.Used Biomass are wood flour, and mean diameter is 2mm, and moisture is 5wt%, and consumption is 1 ton.The method as in figure 2 it is shown, concrete the most such as Under:
The temperature controlling fast pyrolysis reactor is 550 DEG C.Wood flour enters fast pyrolysis reactor through feed arrangement, then After distributing device is dispersed, enters radial canal heating region carries out pyrolytic reaction, generate pyrolysis oil gas and (include on-condensible gas And pyrolysis oil) and pyrolytic carbon.In the case of not being passed through acetylene gas, first in the pyrolysis gas (on-condensible gas) that wood flour pyrolysis obtains The content of alkane, hydrogen, carbon dioxide and carbon monoxide is as shown in table 1.The volume of the on-condensible gas generated is 593.6m3。
Then, being passed through acetylene toward fast pyrolysis reactor, the amount of the acetylene being passed through is 29.68m3.Acetylene is flowing up During contact with the pyrolytic carbon generated, under the catalytic action of pyrolytic carbon, promote further acetylene reaction generation benzene.Containing benzene Pyrolysis oil gas self-heating solution oil gas vent discharge, afterwards experience dust arrester and chiller obtain bio oil, pyrolysis gas.Pyrolysis The pyrolytic carbon obtained is discharged through drawing mechanism, and pyrolysis gas is collected standby after processing further, bio oil is further fed into benzene and divides In device, after separation, obtain benzene.The remaining bio oil without benzene is standby after collecting.
After being passed through acetylene, the benzene amount of increase is 1 times of the benzene that wood flour pyrolyzing produces.
Embodiment 3
The method that the system pyrolysis biomass that the present embodiment provides another kind to utilize embodiment 1 to be provided prepare benzene.Used Biomass be corn straw, mean diameter is 3mm, and moisture is 5wt%, and consumption is 1 ton.The method is as in figure 2 it is shown, have Body is as follows:
The temperature controlling fast pyrolysis reactor is 750 DEG C.1 ton of corn straw is entered fast pyrogenation through feed arrangement anti- Answer device, after distributing device is dispersed, then enters radial canal heating region carries out pyrolytic reaction, generate pyrolysis oil gas and (include On-condensible gas and pyrolysis oil) and pyrolytic carbon.In the case of not being passed through acetylene gas, the pyrolysis gas that corn straw pyrolysis obtains is (no Solidifying gas) in methane, hydrogen, carbon dioxide and carbon monoxide content as shown in table 1.The volume of the on-condensible gas generated is 2574m3。
Then, being passed through acetylene toward fast pyrolysis reactor, the amount of the acetylene being passed through is 128.7m3.Acetylene is flowing up During contact with the pyrolytic carbon generated, under the catalytic action of pyrolytic carbon, promote further acetylene reaction generation benzene.Containing benzene Pyrolysis oil gas self-heating solution oil gas vent discharge, afterwards experience dust arrester and chiller obtain bio oil, pyrolysis gas.Pyrolysis The pyrolytic carbon obtained is discharged through drawing mechanism, and pyrolysis gas is collected standby after processing further, bio oil is further fed into benzene and divides In device, after separation, obtain benzene.The remaining pyrolysis oil without benzene is standby after collecting.
After being passed through acetylene, the benzene amount of increase is 2.5 times of the benzene that wood flour pyrolyzing produces.
Methane, hydrogen, carbon dioxide and the content of each component of carbon monoxide in table 1 pyrolysis gas
To sum up, it is known that system and method provided by the present invention, acetylene is passed through in fast pyrolysis reactor, In methane, hydrogen and carbon dioxide atmosphere that biomass pyrolytic produces, and the catalysis of the pyrolytic carbon produced at biomass pyrolytic Under effect, acetylene reaction generates benzene.The reaction of biomass pyrolytic and acetylene benzene is tied by system and method provided by the present invention Being combined, biomass pyrolytic is that the reaction of acetylene benzene provides required condition, saved energy consumption also save investment and Operating cost, and technological process is the simplest.
Additionally, system and method provided by the present invention also improves the content of aromatic hydrocarbons in bio oil, make the biology of gained The quality of oil gets a promotion, thus improves the economic worth of bio oil.
It should be noted that each embodiment above by reference to described by accompanying drawing is only in order to illustrate rather than restriction originally The scope of invention, it will be understood by those within the art that, the most right Amendment that the present invention is carried out or equivalent, all should contain within the scope of the present invention.Additionally, unless stated otherwise, that All or part of of any embodiment can use in conjunction with all or part of of any other embodiments.

Claims (9)

1. one kind is pyrolyzed biomass and prepares the system of benzene, it is characterised in that it includes fast pyrolysis reactor, acetylene storage dress Put, dust arrester, chiller and benzene segregation apparatus；
Described fast pyrolysis reactor is provided with acetylene entrance and pyrolysis oil gas vent；
Described acetylene storage device is provided with acetylene outlet, and the outlet of described acetylene is connected with described acetylene entrance；
Described dust arrester is provided with pyrolysis oil gas entrance and dedusting oil gas vent, described pyrolysis oil gas entrance and described pyrolysis oil gas Outlet is connected；
Described chiller is provided with dedusting oil gas entrance and bio oil outlet, and described dedusting oil gas entrance and described dedusting oil gas go out Mouth is connected；
Described benzene segregation apparatus is provided with bio oil entrance and benzene outlet, and described bio oil entrance is connected with the outlet of described bio oil.
System the most according to claim 1, it is characterised in that described acetylene entrance is arranged on described fast pyrolysis reactor Middle and lower part.
System the most according to claim 1, it is characterised in that the heater of described fast pyrolysis reactor is heat accumulating type Radiant tube burner, described regenerative radiant tube burner is arranged on along the short transverse multilamellar of described fast pyrolysis reactor On the sidewall of described fast pyrolysis reactor, and radiant tube burner surface spraying has ceramic coating.
System the most according to claim 1, it is characterised in that described fast pyrolysis reactor is additionally provided with discharging opening, described System also includes that drawing mechanism, the entrance of described drawing mechanism are connected with described discharging opening.
5. one kind utilizes the method that in claim 1-4, arbitrary described system pyrolysis biomass prepare benzene, it is characterised in that described Method comprises the steps:
Biomass are sent into described fast pyrolysis reactor be pyrolyzed, prepare pyrolysis oil gas and pyrolytic carbon, described pyrolysis oil gas Including on-condensible gas and pyrolysis oil；
Being sent in described fast pyrolysis reactor by acetylene in described acetylene storage device, described acetylene is at described on-condensible gas React in atmosphere and under the catalytic action of described pyrolytic carbon and generate benzene；
The pyrolysis oil gas comprising benzene is sequentially sent to described dust arrester and described chiller carries out dedusting and cooling, prepare raw Thing oil；
Described bio oil is sent in described benzene segregation apparatus and separates, prepare benzene.
Method the most according to claim 5, it is characterised in that the temperature of described biomass pyrolytic is 550-800 DEG C.
Method the most according to claim 5, it is characterised in that the mean diameter of described biomass is 1-3mm.
Method the most according to claim 5, it is characterised in that the moisture≤5wt% of described biomass.
Method the most according to claim 5, it is characterised in that the consumption of described acetylene is the 5-of described on-condensible gas volume 10%.
CN201610595985.6A 2016-07-26 2016-07-26 Method and system for preparing benzene by biomass pyrolysis Pending CN106045805A (en)

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Application publication date: 20161026