CN207243771U - The system that aromatic hydrocarbon is prepared by coal - Google Patents
The system that aromatic hydrocarbon is prepared by coal Download PDFInfo
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- CN207243771U CN207243771U CN201721142510.8U CN201721142510U CN207243771U CN 207243771 U CN207243771 U CN 207243771U CN 201721142510 U CN201721142510 U CN 201721142510U CN 207243771 U CN207243771 U CN 207243771U
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Abstract
The utility model discloses the system that aromatic hydrocarbon is prepared by coal, including：Mixing device；Molding machine；Revolving bed, is both provided with multiple heat accumulation type radiant tubes in its dry section and pyrolysis zone；Gas and oil separating plant, it has pyrolysis oil gas entrance, coal tar oil export and pyrolysis gas outlet；Purifier, it has purification pyrolysis gas outlet；Furnace of calcium carbide, it is with offgas outlet；Acetylene generator, it is exported with acetylene；Multiple acetylene reaction pipes, multiple acetylene reaction pipes are arranged in the pyrolysis zone of revolving bed and below multiple heat accumulation type radiant tubes, acetylene reaction pipe has reaction gas inlet and mixed gas product exit, and reaction gas inlet is connected with purification pyrolysis gas outlet, acetylene outlet and offgas outlet；Gas fractionation unit.The system prepares aromatic hydrocarbons using low-order coal, realizes the low-order coal of low value to the conversion of the aromatic hydrocarbons of high added value, solves the problems, such as due to the limited caused aromatic hydrocarbon production restriction of petroleum resources.
Description
Technical field
Derived energy chemical field is the utility model is related to, specifically, the utility model is related to and be by what coal prepared aromatic hydrocarbon
System.
Background technology
The energy general layout in China is always rich coal, oil-poor, few gas, coal reserves up to world's coal reserves 17%.Its
The low-order coal resource reserve such as middle lignite, jet coal enriches, and accounts for coal in China reserves and coal production more than 50%, but due to low order
Coal water content is high, directly burns or gasification efficiency is low and the prior art can not make full use of its resource value, result in coal money
The huge waste in source.In April, 2015, National Energy Board issued《Coal Clean efficiently utilizes action plan (2015-2020)》,
Coal sub-prime classified utilization status is significantly improved, vigorously advocates the research and development and demonstration of low-order coal upgrading technology.Therefore, develop low
The clean and effective of rank coal has very major and immediate significance using new way.
The light aromatics such as benzene, toluene and dimethylbenzene are one of most important Elementary Chemical Industry raw material, are widely used in producing rubber
The chemical products such as glue, fiber, plastics and dyestuff.At present, aromatic hydrocarbons is mainly derived from catalytic reforming and hydro carbons heat in petrochemical industry
Solution, only about 10% derives from coal chemical industry.It is therefore, existing that virtue is prepared by coal but petroleum resources are more and more deficienter at present
The means of fragrant hydrocarbon still require study.
Utility model content
The utility model is intended to solve at least some of the technical problems in related technologies.For this reason, this reality
It is to propose the system for preparing aromatic hydrocarbon by coal with a new purpose.The system prepares fragrance using low-order coal as raw material
Hydrocarbon, realizes the conversion of the aromatic hydrocarbon from the low-order coal of low value to high added value, and solve causes since petroleum resources are limited
Aromatic hydrocarbon production restriction the problem of.
In the utility model in a first aspect, the utility model proposes a kind of system that aromatic hydrocarbon is prepared by coal.According to
The embodiment of the utility model, the system include：
Mixing device, the mixing device have quick lime powder entrance, low-order coal powdering inlet and mixed material outlet；
Molding machine, the molding machine have mixed material entrance and the outlet of mixing pelletizing, the mixed material entrance
It is connected with mixed material outlet；
Revolving bed, has feed zone, dry section, pyrolysis zone and discharge zone in the revolving bed, wherein, the dry section with
Multiple heat accumulation type radiant tubes are both provided with the pyrolysis zone, the feed zone has mixing pelletizing entrance, the mixing pelletizing
Entrance is connected with the mixing pelletizing outlet, and the dry section has steam outlet, and there is pyrolysis oil gas to go out for the pyrolysis zone
Mouthful, the discharge zone is exported with upgrading pelletizing；
Gas and oil separating plant, the gas and oil separating plant have pyrolysis oil gas entrance, coal tar oil export and pyrolysis gas outlet,
The pyrolysis oil gas entrance is connected with the pyrolysis oil gas vent；
Purifier, the purifier have pyrolysis gas entrance and purification pyrolysis gas outlet, the pyrolysis gas entrance with
The pyrolysis gas outlet is connected；
Furnace of calcium carbide, the furnace of calcium carbide have upgrading pelletizing entrance, calcium carbide outlet and offgas outlet, the upgrading pelletizing entrance
It is connected with upgrading pelletizing outlet；
Acetylene generator, the acetylene generator have calcium carbide entrance, water inlet and acetylene outlet, the calcium carbide entrance with
The calcium carbide outlet is connected；
Multiple acetylene reaction pipes, the multiple acetylene reaction pipe are arranged in the pyrolysis zone of the revolving bed and are located at
Below the multiple heat accumulation type radiant tube, the acetylene reaction pipe has reaction gas inlet and mixed gas product exit, institute
Reaction gas inlet is stated respectively with acetylene outlet, the purification pyrolysis gas outlet and the offgas outlet to be connected；
There is mixed gas product inlet, light aromatics outlet, ethene to go out for gas fractionation unit, the gas fractionation unit
Mouth and heavy arene outlet, the mixed gas product inlet are connected with the mixed gas product exit.
The system of aromatic hydrocarbon is prepared by by quick lime powder and low order coal dust by coal according to the utility model embodiment
End supply carries out mixed processing into mixing device, and will obtain mixed material and supply into molding machine to carry out forming processes,
Mixing pelletizing is obtained, then mixing pelletizing is supplied into revolving bed, makes rotation of the mixing pelletizing with revolving bed chassis, passes through successively
Dry section and the pyrolysis zone of revolving bed are crossed, processing is dried in dry section in mixing pelletizing, and the dry vapor produced is steamed by water
Gas outlet discharge, the mixing pelletizing by drying process enter pyrolysis zone and carry out pyrolysis processing, obtain pyrolysis oil gas and upgrading ball
Group；And then pyrolysis oil gas is supplied into gas and oil separating plant and carries out Oil-gas Separation processing, to be coal by pyrolysis Oil-gas Separation
Tar and the pyrolysis gas using gases such as carbon dioxide, hydrogen, methane as main component, and pyrolysis gas is supplied into purifier
Purified treatment is carried out, is purified pyrolysis gas；Meanwhile upgrading pelletizing is supplied into furnace of calcium carbide and carries out calcium carbide reaction, so as to
Tail gas to calcium carbide and using carbon monoxide as main component, calcium carbide and water is supplied reaction is hydrolyzed into acetylene generator,
Obtain acetylene；Further, top gas, acetylene and purification top gas are supplied to the multiple second being arranged in revolving bed pyrolysis zone
In alkyne reaction pipe, and polymerisation is carried out, to obtain the mixed gas product of light aromatics, ethene and heavy arene, then will
The mixed gas product, which is supplied into gas fractionation unit, carries out separating treatment, you can isolated light aromatics product, and it is secondary
Produce ethene and heavy arene.Thus, which prepares aromatic hydrocarbon using low-order coal as raw material, realizes the low order from low value
Coal is solved the problems, such as due to the limited caused aromatic hydrocarbon production restriction of petroleum resources to the conversion of the aromatic hydrocarbon of high added value；
Meanwhile the system reduces the investment of acetylene aromatic hydrocarbons reactor, and fully profit by the way that revolving bed is coupled with acetylene reaction pipe
With the temperature field of revolving bed, so as to significantly reduce energy consumption.
Optional, the acetylene reaction pipe is linear pattern hollow pipe, each heat accumulation type radiant tube in the pyrolysis zone
Underface be provided with 1~2 acetylene reaction pipe.
Optional, the distance between the acetylene reaction pipe and the top heat accumulation type radiant tube are H1, and the acetylene is anti-
The distance between material bed below Ying Guanyu is H2, H1:H2=1:(1~3).
Optional, the material of the acetylene reaction pipe is ceramics.
Optional, the outer wall of the acetylene reaction pipe has a catalyst coat, the catalyst coat by alkali metal and γ-
Al2O3Formed, the alkali metal and the γ-Al2O3Mass ratio be 1:(10~40).
Optional, the thickness of the catalyst coat is 20~100 μm.
The additional aspect and advantage of the utility model will be set forth in part in the description, partly by from following description
In become obvious, or recognized by the practice of the utility model.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the utility model will in the description from combination accompanying drawings below to embodiment
Become obvious and be readily appreciated that, wherein：
Fig. 1 is the system structure diagram that aromatic hydrocarbon is prepared by coal according to the utility model one embodiment；
Fig. 2 is that the system for preparing aromatic hydrocarbon by coal using the utility model one embodiment prepares the method flow of aromatic hydrocarbon
Schematic diagram；
Fig. 3 is that the system for preparing aromatic hydrocarbon by coal using another embodiment of the utility model prepares the method stream of aromatic hydrocarbon
Journey schematic diagram.
Embodiment
The embodiment of the utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is same or like element.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model
Limitation.
In addition, term " multiple " is meant that at least two, such as two, three etc., limited unless otherwise clearly specific
It is fixed.
In the utility model, unless otherwise clearly defined and limited, term " connected " should be interpreted broadly, for example,
Can be fixedly connected or be detachably connected, or integrally；Can mechanically connect or be electrically connected；Can be with
It is to be connected directly, can also be indirectly connected by intermediary, can is the phase of connection inside two elements or two elements
Interaction relation, unless otherwise restricted clearly.For the ordinary skill in the art, can manage as the case may be
Solve concrete meaning of the above-mentioned term in the utility model.
In the utility model, unless otherwise clearly defined and limited, fisrt feature is "above" or "below" second feature
Can be that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, first is special
Sign second feature " on ", " top " and " above " can be fisrt feature directly over second feature or oblique upper, or only
Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with
Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height and be less than second feature.
In the utility model in a first aspect, the utility model proposes a kind of system that aromatic hydrocarbon is prepared by coal.According to
The embodiment of the utility model, with reference to figure 1, which includes：Mixing device 100, molding machine 200, revolving bed 300, oil gas
Separator 400, purifier 500, furnace of calcium carbide 600, acetylene generator 700 and multiple acetylene reaction pipes 800.Wherein, batch mixing
Device 100 has quick lime powder entrance 101, low-order coal powdering inlet 102 and mixed material outlet 103；Molding machine 200 has
There are mixed material entrance 201 and mixing pelletizing outlet 202, mixed material entrance 201 is connected with mixed material outlet 103；Rotation
There is feed zone 310, dry section 320, pyrolysis zone 330 and discharge zone 340 in bed 300, wherein, dry section 320 and pyrolysis zone 330
Inside be both provided with multiple heat accumulation type radiant tubes 350, feed zone 310 has a mixing pelletizing entrance 301, mixing pelletizing entrance 301 with
Pelletizing outlet 202 is mixed to be connected, dry section 320 has steam outlet 302, and pyrolysis zone 330 has pyrolysis oil gas vent 303,
Discharge zone 340 has upgrading pelletizing outlet 304；Gas and oil separating plant 400 has pyrolysis oil gas entrance 401, coal tar oil export 402
With pyrolysis gas outlet 403, pyrolysis oil gas entrance 401 is connected with pyrolysis oil gas vent 303；Purifier 500 enters with pyrolysis gas
Mouth 501 and purification pyrolysis gas go out 502 mouthfuls, and pyrolysis gas entrance 501 is connected with pyrolysis gas outlet 403；Furnace of calcium carbide 600 has upgrading ball
Group's entrance 601, calcium carbide outlet 602 and offgas outlet 603, upgrading pelletizing entrance 601 are connected with upgrading pelletizing outlet 304；Acetylene
Generator 700 has calcium carbide entrance 701, water inlet 702 and acetylene outlet 703, and calcium carbide entrance 701 is connected with calcium carbide outlet 602；
Multiple acetylene reaction pipes 800 are arranged in the pyrolysis zone 330 of revolving bed 300 and positioned at multiple lower sections of heat accumulation type radiant tube 350, second
Alkyne reaction pipe 800 has reaction gas inlet 801 and mixed gas product exit (not shown in attached drawing), reaction gas inlet
801 are connected with acetylene outlet 703, purification pyrolysis gas outlet 502 and offgas outlet 603 respectively；Gas fractionation unit 900 has mixed
Gaseous product entrance 901, light aromatics outlet 902, ethene outlet 903 and heavy arene outlet 904 are closed, mixed gas product enters
Mouth 901 is connected with mixed gas product exit.
The system that aromatic hydrocarbon is prepared by coal according to the utility model embodiment is described in detail below with reference to Fig. 1：
There is quick lime powder entrance 101, low-order coal powder to enter for embodiment according to the present utility model, mixing device 100
Mouth 102 and mixed material outlet 103, mixing device 100 are suitable for quick lime powder and low-order coal powder carrying out mixed processing, with
Just mixed material is obtained.Specifically, by the way that quick lime powder is mixed with low-order coal powder, subsequently can be first with low order
Calcium carbide is prepared in coal, then produces acetylene by calcium carbide, so as to fulfill by the aromatic hydrocarbon of the low-order coal of low value to high added value
Conversion.
The particle diameter of embodiment according to the present utility model, quick lime powder and low-order coal powder is not particularly restricted, this
Field technology personnel can make choice according to actual needs, specific embodiment according to the present utility model, quick lime powder and
The average grain diameter of low-order coal powder is preferably no greater than 10 μm to be separately not higher than 20 μm.Thus, it is possible to effectively increase
The contact area of material, improves reaction efficiency.
In the mixed material that specific embodiment according to the present utility model, quick lime powder and low-order coal powder are mixed to get
Low-order coal powder and the mass ratio of quick lime powder can be 1:(1.1~1.4), thus, it is possible to further improve follow-up preparation
The yield of obtained calcium carbide.
Embodiment according to the present utility model, molding machine 200 have mixed material entrance 201 and the outlet of mixing pelletizing
202, mixed material entrance 201 is connected with mixed material outlet 103, and molding machine 200 is suitable for carrying out mixed material at shaping
Reason, to obtain mixing pelletizing.Inventor has found that the caking property having in itself by using low-order coal carries out forming processes, can
With the difficulty to lower the requirement.
Embodiment according to the present utility model, the particle diameter for mixing pelletizing are not particularly restricted, and those skilled in the art can
To be made choice according to actual needs, specific embodiment according to the present utility model, the average grain diameter for mixing pelletizing can be 10
~40mm, inventor have found, by the average grain diameter control by pelletizing is mixed within the above range, can further improve follow-up
The heat transfer efficiency of material in pyrolysis processing, improves the reaction thermal efficiency.
Embodiment according to the present utility model, revolving bed 300 is interior to have feed zone 310, dry section 320,330 and of pyrolysis zone
Discharge zone 340, wherein, multiple heat accumulation type radiant tubes 350 are both provided with dry section 320 and pyrolysis zone 330, feed zone 310 has
There is mixing pelletizing entrance 301, mixing pelletizing entrance 301 is connected with mixing pelletizing outlet 202, and dry section 320 goes out with vapor
Mouth 302, pyrolysis zone 330 have pyrolysis oil gas vent 303, and discharge zone 340 has upgrading pelletizing outlet 304, and revolving bed 300 is suitable for
Processing and pyrolysis processing is dried in mixing pelletizing, to obtain vapor, pyrolysis oil gas and upgrading pelletizing.Specifically, this
Low-order coal employed in utility model refers to that volatile matter is more than the low-quality coal of 35wt%, by the way that mixing pelletizing is pyrolyzed
Processing, can effectively remove the volatile matter in low-order coal, so as to improve the quality for the calcium carbide being prepared in follow-up calcium carbide reaction
And yield.Mix pelletizing to enter after revolving bed with the rotation in revolving bed material domain, first pass around dry section, and 120~
Processing is dried under 200 degrees Celsius to remove the moisture in material, the vapor that drying process obtains is by the top of dry section
Steam outlet discharger；And then the mixing pelletizing by drying enters pyrolysis zone and carries out pyrolysis processing, obtains pyrolysis oil
Gas and upgrading pelletizing.
Specific embodiment according to the present utility model, the heat accumulation type radiant tube quantity that pyrolysis zone is set are 8~16, material
Heat, which is provided, by heat accumulation type radiant tube carries out pyrolysis processing.Specific embodiment according to the present utility model, pyrolysis processing be
Completed when progress 1~2 is small under 700~800 degrees Celsius, thus, it is possible to further remove in mixing pelletizing contained by low-order coal
Volatile matter.
Embodiment according to the present utility model, gas and oil separating plant 400 have pyrolysis oil gas entrance 401, coal tar oil export
402 and pyrolysis gas outlet 403, pyrolysis oil gas entrance 401 is connected with pyrolysis oil gas vent 303, and gas and oil separating plant 400 is suitable for general
The pyrolysis oil gas that mixing pelletizing is pyrolyzed carries out Oil-gas Separation processing, to obtain coal tar and pyrolysis gas.Specifically, it is pyrolyzed
Oil gas can first pass through cooling before Oil-gas Separation processing is carried out.
There is pyrolysis gas entrance 501 and purification pyrolysis gas to go out 502 for embodiment according to the present utility model, purifier 500
Mouthful, pyrolysis gas entrance 501 is connected with pyrolysis gas outlet 403, and purifier 500 is suitable for pyrolysis gas carrying out purified treatment, so as to
It is purified pyrolysis gas.Specifically, the main component of purification pyrolysis gas includes hydrogen, methane, carbon dioxide, carbon monoxide and light
Matter hydro carbons.Wherein, methane, hydrogen and carbon dioxide can subsequently be passed through in acetylene reaction pipe and be used to prepare aromatic hydrocarbon, remaining
The combustible gases such as carbon monoxide, light hydrocarbons can return to the fuel gas for being used as heat accumulation type radiant tube in revolving bed.
Embodiment according to the present utility model, furnace of calcium carbide 600 have upgrading pelletizing entrance 601, calcium carbide outlet 602 and tail gas
Outlet 603, upgrading pelletizing entrance 601 are connected with upgrading pelletizing outlet 304, and furnace of calcium carbide 600 is suitable for upgrading pelletizing carrying out calcium carbide
Reaction, to obtain calcium carbide and top gas.By the way that mixing pelletizing is carried out pyrolysis processing, the upgrading pelletizing system of pyrolysis gained is utilized
Standby calcium carbide, can effectively reduce the energy consumption of furnace of calcium carbide, improve the heat utilization efficiency of technique.At the same time in top gas caused by furnace of calcium carbide
Containing substantial amounts of carbon monoxide, a part of carbon monoxide may be used as the reaction gas that acetylene prepares aromatic hydrocarbon, and another part can use
Make the fuel gas of heat accumulation type radiant tube.
There is calcium carbide entrance 701, water inlet 702 and acetylene to go out for embodiment according to the present utility model, acetylene generator 700
Mouth 703, calcium carbide entrance 701 are connected with calcium carbide outlet 602, and acetylene generator 700 is suitable for calcium carbide and water reaction is hydrolyzed, with
Just acetylene is obtained.
Embodiment according to the present utility model, multiple acetylene reaction pipes 800 are arranged in the pyrolysis zone 330 of revolving bed 300
And there is reaction gas inlet 801 and mixed gas product positioned at multiple lower sections of heat accumulation type radiant tube 350, acetylene reaction pipe 800
(not shown in attached drawing), reaction gas inlet 801 goes out with acetylene outlet 703, purification pyrolysis gas outlet 502 and tail gas respectively for outlet
Mouth 603 is connected, and acetylene reaction pipe 800 is suitable for top gas, acetylene and purification pyrolysis gas carrying out polymerisation, to be mixed
Gaseous product.Specifically, by by acetylene and top gas and purifying methane, hydrogen, carbon dioxide, the carbon monoxide in pyrolysis gas
Mix and carry out polymerisation at high temperature, wherein methane can reduce the formation of carbon deposit in reaction, and hydrogen can be anti-with acetylene
The gases such as ethene should be generated, while reduce carbon deposit, carbon dioxide and carbon monoxide can reduce acetylene as diluent gas
Partial pressure, so as to further reduce the formation of carbon deposit.On the other hand, by the way that multiple acetylene reaction pipes to be arranged on to the pyrolysis of revolving bed
In area, the temperature field in revolving bed burner hearth can be made full use of, and acetylene polymerization reaction is exothermic reaction, so as to maintain stove
High temperature in thorax.
Specific embodiment according to the present utility model, the temperature of the interior polymerisation carried out of acetylene reaction pipe is 800~920
Degree Celsius.
Specific embodiment according to the present utility model, acetylene reaction pipe is linear pattern hollow pipe, and pyrolysis zone is each
1~2 acetylene reaction pipe is provided with immediately below heat accumulation type radiant tube.
The distance between specific embodiment according to the present utility model, acetylene reaction pipe and top heat accumulation type radiant tube are
H1, acetylene reaction pipe and lower section the distance between material bed are H2, H1:H2=1:(1~3).Thus, it is possible to so that acetylene reaction
Relatively close heat accumulation type radiant tube is managed, so as to ensure that there is higher temperature in acetylene reaction pipe, so that polymerization occurs for acetylene instead
Should.
Specific embodiment according to the present utility model, the material of acetylene reaction pipe is ceramics, thus, it is possible to further improve
The heat resistance of acetylene reaction pipe.
Specific embodiment according to the present utility model, the outer wall of acetylene reaction pipe have catalyst coat, catalyst coat
By alkali metal and γ-Al2O3Formed, alkali metal and γ-Al2O3Mass ratio be 1:(10~40).Specifically, mixing pelletizing heat
The pyrolysis oil gas that solution obtains can make the mink cell focus in pyrolysis oil gas that high anneal crack further occur after being contacted with the catalyst coat
Solution, so as to improve the yield for the pyrolysis gas that later separation is handled.
Specific embodiment according to the present utility model, the thickness of catalyst coat can be 20~100 μm.Thus, it is possible to
Further improve the Pintsch process efficiency of mink cell focus in pyrolysis oil gas.
Embodiment according to the present utility model, gas fractionation unit 900 have mixed gas product inlet 901, lightweight virtue
Hydrocarbon outlet 902, ethene outlet 903 and heavy arene outlet 904, mixed gas product inlet 901 and mixed gas product exit
It is connected, gas fractionation unit 900 is suitable for mixed gas product carrying out separating treatment, to respectively obtain light aromatics, ethene
And heavy arene.
Thus, the system of aromatic hydrocarbon is prepared by by quick lime powder and low order by coal according to the utility model embodiment
The supply of coal dust end carries out mixed processing into mixing device, and will obtain mixed material and supply into molding machine to carry out at shaping
Reason, obtains mixing pelletizing, then mixing pelletizing is supplied into revolving bed, makes rotation of the mixing pelletizing with revolving bed chassis, according to
Processing is dried in dry section in secondary dry section and pyrolysis zone by revolving bed, mixing pelletizing, the vapor of dry generation by
Steam outlet is discharged, and the mixing pelletizing by drying process enters pyrolysis zone and carries out pyrolysis processing, is obtained pyrolysis oil gas and is carried
Matter pelletizing；And then pyrolysis oil gas is supplied into gas and oil separating plant and carries out Oil-gas Separation processing, so as to which Oil-gas Separation will be pyrolyzed
Pyrolysis gas for coal tar and using gases such as carbon dioxide, hydrogen, methane as main component, and pyrolysis gas is supplied to purification and is filled
Middle carry out purified treatment is put, is purified pyrolysis gas；Meanwhile upgrading pelletizing is supplied into furnace of calcium carbide and carries out calcium carbide reaction, with
Just calcium carbide and the top gas using carbon monoxide as main component are obtained, calcium carbide and water are supplied and are hydrolyzed into acetylene generator
Reaction, obtains acetylene；Further, top gas, acetylene and purification top gas are supplied to being arranged in revolving bed pyrolysis zone
In multiple acetylene reaction pipes, and polymerisation is carried out, to obtain the production of the mixed gas of light aromatics, ethene and heavy arene
Thing, then the mixed gas product is supplied into gas fractionation unit and carries out separating treatment, you can isolated light aromatics production
Product, and by-product ethene and heavy arene.Thus, which prepares aromatic hydrocarbon using low-order coal as raw material, realizes from a low price
The low-order coal of value is solved due to the limited caused aromatic hydrocarbon production restriction of petroleum resources to the conversion of the aromatic hydrocarbon of high added value
The problem of；Meanwhile the system reduces the investment of acetylene aromatic hydrocarbons reactor by the way that revolving bed is coupled with acetylene reaction pipe,
And the temperature field of revolving bed is taken full advantage of, so as to significantly reduce energy consumption.
In order to facilitate the system that aromatic hydrocarbon is prepared by coal for understanding the utility model embodiment, below to utilizing the system system
The method of standby aromatic hydrocarbon is described.
Embodiment according to the present utility model, this method include：Quick lime powder and low-order coal powder are supplied to batch mixing
Mixed processing is carried out in device, to obtain mixed material；Mixed material is supplied into molding machine and carries out forming processes, with
Just mixing pelletizing is obtained；Mixing pelletizing is supplied processing and pyrolysis processing is dried into revolving bed, so as to obtain vapor,
Upgrading pelletizing and pyrolysis oil gas；Pyrolysis oil gas is supplied into gas and oil separating plant and carries out Oil-gas Separation processing, to obtain coal
Tar and pyrolysis gas；Pyrolysis gas is supplied into purifier and carries out purified treatment, to be purified pyrolysis gas；By upgrading ball
Group's supply carries out calcium carbide reaction into furnace of calcium carbide, to obtain calcium carbide and top gas；By calcium carbide and water supply into furnace of calcium carbide into
Row hydrolysis, to obtain acetylene；Top gas, acetylene and purification pyrolysis gas are supplied and carry out polymerizeing instead into acetylene reaction pipe
Should, to obtain mixed gas product；Mixed gas product is supplied into gas fractionation unit and carries out separating treatment, so as to
To light aromatics, ethene and heavy arene.
The system for preparing aromatic hydrocarbon by coal to the utilization according to the utility model embodiment below with reference to Fig. 2 prepares aromatic hydrocarbon
Method be described in detail.Embodiment according to the present utility model, this method include：
S100：Mixed processing
In the step, quick lime powder and low-order coal powder are supplied into mixing device and carry out mixed processing, so as to
To mixed material.Specifically, by the way that quick lime powder is mixed with low-order coal powder, subsequently can be first with low-order coal system
It is standby to obtain calcium carbide, then acetylene is produced by calcium carbide, so as to fulfill by the conversion of the aromatic hydrocarbon of the low-order coal of low value to high added value.
The particle diameter of embodiment according to the present utility model, quick lime powder and low-order coal powder is not particularly restricted, this
Field technology personnel can make choice according to actual needs, specific embodiment according to the present utility model, quick lime powder and
The average grain diameter of low-order coal powder is preferably no greater than 10 μm to be separately not higher than 20 μm.Thus, it is possible to effectively increase
The contact area of material, improves reaction efficiency.
In the mixed material that specific embodiment according to the present utility model, quick lime powder and low-order coal powder are mixed to get
Low-order coal powder and the mass ratio of quick lime powder can be 1:(1.1~1.4), thus, it is possible to further improve follow-up preparation
The yield of obtained calcium carbide.
S200：Forming processes
In the step, mixed material is supplied into molding machine and carries out forming processes, to obtain mixing pelletizing.Invention
People has found that the caking property having in itself by using low-order coal carries out forming processes, the difficulty that can be lowered the requirement.
Embodiment according to the present utility model, the particle diameter for mixing pelletizing are not particularly restricted, and those skilled in the art can
To be made choice according to actual needs, specific embodiment according to the present utility model, the average grain diameter for mixing pelletizing can be 10
~40mm, inventor have found, by the average grain diameter control by pelletizing is mixed within the above range, can further improve follow-up
The heat transfer efficiency of material in pyrolysis processing, improves the reaction thermal efficiency.
S300：Drying process and pyrolysis processing
In the step, mixing pelletizing is supplied processing and pyrolysis processing are dried into revolving bed, steamed to obtain water
Gas, upgrading pelletizing and pyrolysis oil gas.Specifically, there is feed zone, dry section, pyrolysis zone and discharge zone in revolving bed, wherein, do
Be both provided with multiple heat accumulation type radiant tubes in dry area and pyrolysis zone, feed zone has a mixing pelletizing entrance, mixing pelletizing entrance with
Mix pelletizing outlet to be connected, dry section has steam outlet, and pyrolysis zone has pyrolysis oil gas vent, and discharge zone has upgrading ball
Group outlet；Low-order coal employed in the utility model refers to that volatile matter is more than the low-quality coal of 35wt%, by that will mix ball
Group carries out pyrolysis processing, can effectively remove the volatile matter in low-order coal, so as to improve what is be prepared in follow-up calcium carbide reaction
The quality and yield of calcium carbide.Mix pelletizing to enter after revolving bed with the rotation in revolving bed material domain, first pass around dry section,
And processing is dried under 120~200 degrees Celsius to remove the moisture in material, the vapor that drying process obtains is by doing
Steam outlet discharger at the top of dry area；And then the mixing pelletizing by drying enters pyrolysis zone and carries out pyrolysis processing, obtains
To pyrolysis oil gas and upgrading pelletizing.
Specific embodiment according to the present utility model, the heat accumulation type radiant tube quantity that pyrolysis zone is set are 8~16, material
Heat, which is provided, by heat accumulation type radiant tube carries out pyrolysis processing.Specific embodiment according to the present utility model, pyrolysis processing be
Completed when progress 1~2 is small under 700~800 degrees Celsius, thus, it is possible to further remove in mixing pelletizing contained by low-order coal
Volatile matter.
S400：Oil-gas Separation processing
In the step, pyrolysis oil gas is supplied into gas and oil separating plant and carries out Oil-gas Separation processing, to obtain coal tar
Oil and pyrolysis gas.Specifically, oil gas is pyrolyzed before Oil-gas Separation processing is carried out, and can first pass through cooling.
S500：Purified treatment
In the step, pyrolysis gas is supplied into purifier and carries out purified treatment, to be purified pyrolysis gas.Specifically
, purifying the main component of pyrolysis gas includes hydrogen, methane, carbon dioxide, carbon monoxide and light hydrocarbons.Wherein, methane, hydrogen
Gas and carbon dioxide, which can be subsequently passed through in acetylene reaction pipe, is used to prepare aromatic hydrocarbon, remaining carbon monoxide, light hydrocarbons etc.
Combustible gas can return to the fuel gas for being used as heat accumulation type radiant tube in revolving bed.
S600：Calcium carbide reacts
In the step, upgrading pelletizing is supplied into furnace of calcium carbide and carries out calcium carbide reaction, to obtain calcium carbide and top gas.Will
Calcium carbide and water are supplied, and reaction is hydrolyzed into furnace of calcium carbide, to obtain acetylene.By the way that mixing pelletizing is carried out pyrolysis processing, profit
Calcium carbide is prepared with the upgrading pelletizing of pyrolysis gained, the energy consumption of furnace of calcium carbide can be effectively reduced, improve the heat utilization efficiency of technique.At the same time
Contain substantial amounts of carbon monoxide in top gas caused by furnace of calcium carbide, a part of carbon monoxide may be used as acetylene and prepare aromatic hydrocarbon
Reaction gas, another part can be used as the fuel gas of heat accumulation type radiant tube.
S700：Hydrolysis
In the step, calcium carbide and water are supplied reaction is hydrolyzed into furnace of calcium carbide, to obtain acetylene.
S800：Polymerisation
In the step, top gas, acetylene and purification pyrolysis gas are supplied and polymerisation carried out into acetylene reaction pipe, so as to
Obtain mixed gas product.Specifically, multiple acetylene reaction pipes are arranged in the pyrolysis zone of revolving bed and are located at multiple heat accumulating types
Below radiant tube, acetylene reaction pipe has reaction gas inlet and a mixed gas product exit, reaction gas inlet respectively with second
Alkynes outlet, purification pyrolysis gas outlet be connected with offgas outlet, acetylene reaction pipe be suitable for by top gas, acetylene and purification pyrolysis gas into
Row polymerisation, to obtain mixed gas product.Specifically, by by acetylene and top gas and purifying the first in pyrolysis gas
Alkane, hydrogen, carbon dioxide, carbon monoxide mix and carry out polymerisation at high temperature, and wherein methane can reduce product in reaction
The formation of charcoal, hydrogen can generate the gas such as ethene with acetylene reaction, while reduce carbon deposit, and carbon dioxide and carbon monoxide can be with
As diluent gas to reduce the partial pressure of acetylene, so as to further reduce the formation of carbon deposit.On the other hand, by by multiple acetylene
Reaction tube is arranged in the pyrolysis zone of revolving bed, can make full use of the temperature field in revolving bed burner hearth, and acetylene polymerization reacts
For exothermic reaction, so as to maintain the high temperature in burner hearth.
Specific embodiment according to the present utility model, the temperature of the interior polymerisation carried out of acetylene reaction pipe is 800~920
Degree Celsius.
Specific embodiment according to the present utility model, acetylene reaction pipe is linear pattern hollow pipe, and pyrolysis zone is each
1~2 acetylene reaction pipe is provided with immediately below heat accumulation type radiant tube.
The distance between specific embodiment according to the present utility model, acetylene reaction pipe and top heat accumulation type radiant tube are
H1, acetylene reaction pipe and lower section the distance between material bed are H2, H1:H2=1:(1~3).Thus, it is possible to so that acetylene reaction
Relatively close heat accumulation type radiant tube is managed, so as to ensure that there is higher temperature in acetylene reaction pipe, so that polymerization occurs for acetylene instead
Should.
Specific embodiment according to the present utility model, the material of acetylene reaction pipe is ceramics, thus, it is possible to further improve
The heat resistance of acetylene reaction pipe.
Specific embodiment according to the present utility model, the outer wall of acetylene reaction pipe have catalyst coat, catalyst coat
By alkali metal and γ-Al2O3Formed, alkali metal and γ-Al2O3Mass ratio be 1:(10~40).Specifically, mixing pelletizing heat
The pyrolysis oil gas that solution obtains can make the mink cell focus in pyrolysis oil gas that high anneal crack further occur after being contacted with the catalyst coat
Solution, so as to improve the yield for the pyrolysis gas that later separation is handled.
Specific embodiment according to the present utility model, the thickness of catalyst coat can be 20~100 μm.Thus, it is possible to
Further improve the Pintsch process efficiency of mink cell focus in pyrolysis oil gas.
S900：Separating treatment
In the step, mixed gas product is supplied into gas fractionation unit and carries out separating treatment, to respectively obtain
Light aromatics, ethene and heavy arene.
Thus, according to the method for preparing aromatic hydrocarbon of the utility model embodiment by by quick lime powder and low order coal dust
End supply carries out mixed processing into mixing device, and will obtain mixed material and supply into molding machine to carry out forming processes,
Mixing pelletizing is obtained, then mixing pelletizing is supplied into revolving bed, makes rotation of the mixing pelletizing with revolving bed chassis, passes through successively
Dry section and the pyrolysis zone of revolving bed are crossed, processing is dried in dry section in mixing pelletizing, and the dry vapor produced is steamed by water
Gas outlet discharge, the mixing pelletizing by drying process enter pyrolysis zone and carry out pyrolysis processing, obtain pyrolysis oil gas and upgrading ball
Group；And then pyrolysis oil gas is supplied into gas and oil separating plant and carries out Oil-gas Separation processing, to be coal by pyrolysis Oil-gas Separation
Tar and the pyrolysis gas using gases such as carbon dioxide, hydrogen, methane as main component, and pyrolysis gas is supplied into purifier
Purified treatment is carried out, is purified pyrolysis gas；Meanwhile upgrading pelletizing is supplied into furnace of calcium carbide and carries out calcium carbide reaction, so as to
Top gas to calcium carbide and using carbon monoxide as main component, calcium carbide and water are supplied and are hydrolyzed into acetylene generator instead
Should, obtain acetylene；Further, top gas, acetylene and purification top gas are supplied more in revolving bed pyrolysis zone to being arranged on
In a acetylene reaction pipe, and polymerisation is carried out, to obtain the mixed gas product of light aromatics, ethene and heavy arene,
The mixed gas product is supplied into gas fractionation unit again and carries out separating treatment, you can isolated light aromatics product,
And by-product ethene and heavy arene.Thus, this method prepares aromatic hydrocarbon using low-order coal as raw material, realizes from low value
Low-order coal solves asking due to the limited caused aromatic hydrocarbon production restriction of petroleum resources to the conversion of the aromatic hydrocarbon of high added value
Topic；Meanwhile this method reduces the investment of acetylene aromatic hydrocarbons reactor, and fill by the way that revolving bed is coupled with acetylene reaction pipe
Divide the temperature field that make use of revolving bed, so as to significantly reduce energy consumption.
Below with reference to specific embodiment, the utility model is described, it is necessary to which explanation is, these embodiments are only
Descriptive, without limiting the utility model in any way.
Embodiment
With reference to figure 3, by quick lime powder and middle low order powder coal in mass ratio 1.1 of the particle diameter below 20 μm:1 mixing,
Add appropriate binding agent and carry out pressure ball, a diameter of 10~40mm of control pelletizing.Pelletizing is sent into revolving bed, the temperature of radiant tube
1000 DEG C, pyrolysis processing temperature is 800 DEG C, pyrolysis time 1h, and obtained upgrading pelletizing hot charging enters furnace of calcium carbide production calcium carbide.Give birth to
The calcium carbide cooling crush of production, by the size controlling of calcium carbide between 50~80mm, reacts into acetylene generator and obtains acetylene.
By the system, low-order coal powder can obtain the acetylene of 370kg, 86kg with 1100kg quick lime powders in 1000kg
Hydrogen, methane, 31kg carbon dioxide and the 420kg carbon monoxide of 242kg.Acetylene, hydrogen, methane, the carbon dioxide of gained
It is passed through with 200kg carbon monoxide in the acetylene reaction pipe in revolving bed and carries out polymerisation.Acetylene reaction pipe internal temperature is 900
DEG C, residence time of the hybrid reaction gas in reaction tube is 1.2s, production obtain 281kg light aromatics, 38kg heavy arenes and
36kg ethene.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
State and be necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with
Combine in an appropriate manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this area
Technical staff can by the different embodiments or example described in this specification and different embodiments or exemplary feature into
Row combines and combination.
Although the embodiment of the utility model has been shown and described above, it is to be understood that above-described embodiment is
Exemplary, it is impossible to the limitation to the utility model is interpreted as, those of ordinary skill in the art are in the scope of the utility model
It is interior above-described embodiment to be changed, changed, replaced and modification.
Claims (5)
- A kind of 1. system that aromatic hydrocarbon is prepared by coal, it is characterised in that including：Mixing device, the mixing device have quick lime powder entrance, low-order coal powdering inlet and mixed material outlet；Molding machine, the molding machine have mixed material entrance and the outlet of mixing pelletizing, the mixed material entrance and institute Mixed material outlet is stated to be connected；Revolving bed, has feed zone, dry section, pyrolysis zone and discharge zone in the revolving bed, wherein, the dry section and described Multiple heat accumulation type radiant tubes are both provided with pyrolysis zone, the feed zone has mixing pelletizing entrance, the mixing pelletizing entrance It is connected with the mixing pelletizing outlet, the dry section has steam outlet, and the pyrolysis zone has pyrolysis oil gas vent, institute Discharge zone is stated to export with upgrading pelletizing；Gas and oil separating plant, the gas and oil separating plant has pyrolysis oil gas entrance, coal tar oil export and pyrolysis gas outlet, described Pyrolysis oil gas entrance is connected with the pyrolysis oil gas vent；Purifier, the purifier have pyrolysis gas entrance and purification pyrolysis gas outlet, the pyrolysis gas entrance with it is described Pyrolysis gas outlet is connected；Furnace of calcium carbide, the furnace of calcium carbide have upgrading pelletizing entrance, calcium carbide outlet and offgas outlet, the upgrading pelletizing entrance and institute The outlet of upgrading pelletizing is stated to be connected；Acetylene generator, the acetylene generator have calcium carbide entrance, water inlet and acetylene outlet, the calcium carbide entrance with it is described Calcium carbide outlet is connected；Multiple acetylene reaction pipes, the multiple acetylene reaction pipe are arranged in the pyrolysis zone of the revolving bed and positioned at described Below multiple heat accumulation type radiant tubes, the acetylene reaction pipe has reaction gas inlet and mixed gas product exit, described anti- Gas access is answered to be connected respectively with acetylene outlet, the purification pyrolysis gas outlet and the offgas outlet；Gas fractionation unit, the gas fractionation unit have mixed gas product inlet, light aromatics outlet, ethene outlet and Heavy arene exports, and the mixed gas product inlet is connected with the mixed gas product exit.
- 2. the system according to claim 1 that aromatic hydrocarbon is prepared by coal, it is characterised in that the acetylene reaction pipe is straight line Type hollow pipe, is provided with 1~2 acetylene reaction pipe immediately below each heat accumulation type radiant tube in the pyrolysis zone.
- 3. the system according to claim 2 that aromatic hydrocarbon is prepared by coal, it is characterised in that the acetylene reaction pipe and top The distance between described heat accumulation type radiant tube is H1, and it is H2, H1 that the distance between the acetylene reaction pipe and lower section are material bed:H2 =1:(1~3).
- 4. the system that aromatic hydrocarbon is prepared by coal according to Claims 2 or 3, it is characterised in that the acetylene reaction pipe Material is ceramics.
- 5. the system that aromatic hydrocarbon is prepared by coal according to Claims 2 or 3, it is characterised in that the acetylene reaction pipe Outer wall has catalyst coat, and the thickness of the catalyst coat is 20~100 μm.
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