CN206318897U - The system that benzene and ethene are prepared by coal - Google Patents
The system that benzene and ethene are prepared by coal Download PDFInfo
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- CN206318897U CN206318897U CN201621361140.2U CN201621361140U CN206318897U CN 206318897 U CN206318897 U CN 206318897U CN 201621361140 U CN201621361140 U CN 201621361140U CN 206318897 U CN206318897 U CN 206318897U
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Abstract
The utility model discloses the system that benzene and ethene are prepared by coal, including：Coal breaker, limekiln, quick lime breaker, batch mixing press ball device, furnace of calcium carbide, calcium carbide crushing device, acetylene generator, acetylene benzene reactor and separator.Wherein, batch mixing press ball device has quick lime entrance, coal powder entrance and the outlet of material pelletizing；Furnace of calcium carbide has material pelletizing entrance, calcium carbide outlet and carbon monoxide outlet；Acetylene generator has calcium carbide particle entrance, water inlet and acetylene outlet；Benzene reactor processed has acetylene entrance, carbon dioxide entrance, carbon monoxide inlet, hydrogen inlet, methane entrance and benzene product exit, acetylene entrance is connected with acetylene outlet, and carbon dioxide entrance is connected with carbon dioxide outlet, and carbon monoxide inlet is connected with carbon monoxide outlet.Can be realized using the system prepare benzene using coal maximization, so as to realize the conversion from benzene of the coal of low value to high added value.
Description
Technical field
The utility model is related to metallurgical technology field, specifically, and the utility model is related to one kind and prepares benzene and second by coal
The system of alkene.
Background technology
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.Aromatic hydrocarbons is mainly derived from catalytic reforming and hydrocarbon pyrolysis in petrochemical industry, only
There is about 10% to derive from coal chemical industry.Current petroleum resources are more and more deficienter, and China is a coal big country, and rich coal is few
Oil.Therefore, the new technology for there are the light aromatics such as coal production benzene is developed imperative.
Utility model content
The utility model is intended at least solve one of technical problem in correlation technique to a certain extent.Therefore, this reality
It is to propose a kind of system that benzene and ethene are prepared by coal with a new purpose, the system can be realized to be maximized using coal
Benzene is prepared, the yield of benzene is drastically increased, so that the conversion from benzene of the coal of low value to high added value is realized, and with stream
Journey is simple, difficulty of processing is low, process costs are low and the high advantage of economy.
According to one side of the present utility model, the utility model proposes a kind of system that benzene and ethene are prepared by coal.
According to embodiment of the present utility model, the system includes：
Coal breaker, the coal breaker has coal entrance and coal dust outlet；
There is preheating zone in limekiln, the limekiln and area is fired, the preheating zone has lime stone entrance, the burning
There is quick lime to export and carbon dioxide outlet in area processed；
Quick lime breaker, the quick lime breaker has quick lime entrance and quick lime powder outlet, described
Quick lime entrance is connected with quick lime outlet；
Batch mixing press ball device, the batch mixing press ball device has quick lime powder entrance, coal powdering inlet and material pelletizing
Outlet, the quick lime powder entrance is connected with quick lime powder outlet, and the coal powdering inlet goes out with the coal dust end
Mouth is connected；
Furnace of calcium carbide, the furnace of calcium carbide has material pelletizing entrance, calcium carbide outlet and carbon monoxide outlet, the material pelletizing
Entrance is connected with material pelletizing outlet；
Calcium carbide crushing device, the calcium carbide crushing device has calcium carbide entrance and the outlet of calcium carbide particle, the calcium carbide entrance
It is connected with calcium carbide outlet；
Acetylene generator, the acetylene generator has calcium carbide particle entrance, water inlet and acetylene outlet, and the calcium carbide is broken
Material entrance is connected with calcium carbide particle outlet；
Acetylene benzene reactor, the benzene reactor processed has an acetylene entrance, carbon dioxide entrance, carbon monoxide inlet,
Hydrogen inlet, methane entrance and benzene product exit, the acetylene entrance are connected with acetylene outlet, the carbon dioxide entrance
It is connected with the carbon dioxide outlet, the carbon monoxide inlet is connected with carbon monoxide outlet；
Separator, the separator have benzene product inlet, ethene outlet and benzene outlet, the benzene product inlet with
The benzene product exit is connected.
Thus, the system for preparing benzene and ethene by coal according to the utility model embodiment to pass through that carry out powder by coal broken
Reason obtains coal dust end, and fired rear crush of lime stone is obtained into quick lime powder, coal dust end is mixed into ball processed with quick lime powder
Group, and material pelletizing is obtained into calcium carbide and carbon monoxide through calcium carbide reaction, further calcium carbide and water are reacted, acetylene is obtained, most
Acetylene and hydrogen, methane, the carbon dioxide and carbon monoxide that above react generation are mixed and be passed through acetylene benzene reactor and enter afterwards
Row reaction, to obtain target product benzo by-product ethene.Using the method system of the present utility model that benzene and ethene are prepared by coal
Standby benzene, which can be realized, prepare benzene using coal maximization, the yield of benzene be drastically increased, so as to realize from the coal of low value to height
The conversion of the benzene of added value, and have the advantages that flow is simple, difficulty of processing is low, process costs are low and economy is high.
Additional aspect and advantage of the present utility model will be set forth in part in the description, partly by from following description
In become obvious, or by it is of the present utility model practice recognize.
Brief description of the drawings
Of the present utility model above-mentioned and/or additional aspect and advantage will from description of the accompanying drawings below to embodiment is combined
Become substantially and be readily appreciated that, wherein：
Fig. 1 is the system structure diagram that benzene and ethene are prepared by coal according to the utility model one embodiment.
Fig. 2 is the system structure diagram that benzene and ethene are prepared by coal according to another embodiment of the utility model.
Fig. 3 is to prepare benzene and ethene method using the system for preparing benzene and ethene by coal of the utility model one embodiment
Schematic flow sheet.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element or element with same or like function are represented to same or similar label eventually.Below by ginseng
The embodiment for examining accompanying 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 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 be mechanical connection or electrical connection；Can be with
It is to be joined directly together, can also be indirectly connected to by intermediary, can is connection or the phase of two elements of two element internals
Interaction relation, unless otherwise clear and definite restriction.For the ordinary skill in the art, it can manage as the case may be
Solve concrete meaning of the above-mentioned term in the utility model.
According to one side of the present utility model, the utility model proposes a kind of system that benzene is prepared by coal.According to this
The embodiment of utility model, with reference to Fig. 1-2, the system includes：Coal breaker 100, limekiln 200, quick lime breaker
300th, batch mixing press ball device 400, furnace of calcium carbide 500, the acetylene generator 700 of calcium carbide crushing device 600, acetylene benzene reactor 800
With separator 900.
According to embodiment of the present utility model, coal breaker 100 has coal entrance 101 and a coal export 102, and suitable for pair
Coal carries out break process, to obtain coal dust end, wherein, coal is the high-quality coal or semi-coke that volatile matter is not higher than 10wt%.Hair
A person of good sense has found, by the way that coal is carried out into break process, coal can be made to be sufficiently mixed with the unclassified stores in subsequent step, so as to improve
Reaction efficiency and yield.
According to embodiment of the present utility model, the volatile matter of coal is not higher than 10wt%.When volatile matter is higher in coal, coal
The gas produced in furnace of calcium carbide, furnace of calcium carbide is directly entered with quick lime excessively, easily causes the material that collapses, and improve the electricity of furnace of calcium carbide
Consumption.
According to embodiment of the present utility model, the average grain diameter at coal dust end can be not higher than 20 microns, preferably no greater than 10
Micron.Inventor is by many experiments it was unexpectedly observed that by the way that coal is finely ground into micron level, can specifically wear into not higher than 20
The coal dust end of micron, it is possible thereby to so that coal dust end and the contact area of quick lime powder are significantly increased, and then significantly reduce two
The reaction energy of person, improves the reaction efficiency of the two.
According to embodiment of the present utility model, limekiln 200 has preheating zone 210 and fires area 220, and preheating zone 210 has
There is lime stone entrance 201, firing area 220 has quick lime outlet 202 and carbon dioxide outlet 203, and limekiln 200 is suitable to stone
Lime stone particle is fired processing, to obtain quick lime and carbon dioxide.Specifically, lime stone first is transported into pre- to limekiln
Hot-zone is preheated, after preheating, then by lime stone transport to fire area be fired, obtained carbon dioxide can subsequently made
As diluent in standby benzene reaction, the partial pressure of reaction gas is reduced, carbon deposit is reduced.
According to embodiment of the present utility model, lime stone is that calcium carbonate content is higher (typically more than 97%), impurity compared with
Few lime stone.
According to embodiment of the present utility model, the temperature of limekiln preheating zone is 800~850 degrees Celsius.Inventor's discovery,
Preheating zone temperature is too low, then is unable to reach pre-heat effect, causes subsequently to fire reaction efficiency reduction；And preheating zone temperature is too high,
Then easily cause the loss of lime stone.
According to embodiment of the present utility model, the temperature in limekiln firing area is 900~1100 degrees Celsius.Invention human hair
It is existing, if the temperature for firing area is too low, lime stone can not be made to be fully converted into quick lime and carbon dioxide；And if firing area
Temperature is too high, then can raise energy consumption and occur side reaction, causes the yield of quick lime and carbon dioxide and reduces.
According to embodiment of the present utility model, quick lime breaker 300 has quick lime entrance 301 and quick lime powder
Outlet 302, and suitable for quick lime is carried out into break process, to obtain quick lime powder.
According to embodiment of the present utility model, the average grain diameter through broken obtained quick lime powder is not higher than 20 microns,
Preferably no greater than 10 microns.Inventor is had found, quick lime is finely ground into micron level, not higher than 20 microns can be specifically worn into
Quick lime powder, it is possible thereby to so that coal dust end and the contact area of quick lime powder are significantly increased, and then significantly reduce the two
Reaction energy, improve the reaction efficiency of the two.
According to embodiment of the present utility model, there is batch mixing press ball device 400 quick lime powder entrance 401, coal dust end to enter
Mouth 402 and material pelletizing outlet 403, quick lime powder entrance 401 are connected with quick lime powder outlet 302, coal powdering inlet 402
It is connected with coal dust outlet 102, batch mixing press ball device 400 is suitable to quick lime and coal dust end carrying out mixed processing, to obtain
Material pelletizing.
According to one embodiment of the present utility model, coal dust end and the mixed proportion of quick lime are not particularly restricted, this
Art personnel can be selected according to actual needs, according to a specific embodiment of the present utility model, coal dust end with
Quick lime can be according to mass ratio (0.6~0.8)：1 carries out mixed processing, residual in calcium carbide furnace discharge when coal powder mixture ratio is too high
Charcoal is higher, and quick lime is superfluous when too low, and influence produces electricity stone quality.
According to embodiment of the present utility model, furnace of calcium carbide 500 has material pelletizing entrance 501, calcium carbide outlet 502 and an oxygen
Change carbon outlet 503, material pelletizing entrance 501 is connected with material pelletizing outlet 403, and furnace of calcium carbide 500 is suitable to batch mixing press ball device
The material pelletizing prepared in 400 carries out calcium carbide reaction, to obtain calcium carbide and carbon monoxide.Wherein, the oxidation obtained
Carbon can as follow-up acetylene benzene thermal response fuel gas, of the present utility model benzene is prepared by coal it is possible thereby to further reduce
With the cost and energy consumption of the method for ethene.
According to embodiment of the present utility model, there is calcium carbide crushing device 600 calcium carbide entrance 601 and calcium carbide particle to export
602, calcium carbide entrance 601 is connected with calcium carbide outlet 502, and calcium carbide crushing device 600 is broken for calcium carbide particle suitable for just calcium carbide.
According to embodiment of the present utility model, calcium carbide can be crushed to particle diameter not higher than 80mm, preferably calcium carbide is crushed
It is 50~80mm to particle diameter.Inventor has found, if the particle diameter of calcium carbide is excessive, can not fully be reacted with water and prepare second
Alkynes, and can raise required energy consumption；And if calcium carbide is crushed into smaller particle, then can significantly improve the cost of break process.
Inventor is had found by many experiments, and calcium carbide is crushed into particle diameter for 50~80mm, can ensure that break process cost is relatively low
While, make to prepare the reaction efficiency of acetylene, energy consumption and yield optimal.
According to embodiment of the present utility model, acetylene generator 700 has calcium carbide particle entrance 701, water inlet 702 and second
Alkynes outlet 703, calcium carbide particle entrance 701 is connected with calcium carbide particle outlet 602, and acetylene generator 700 is suitable to the broken dress of calcium carbide
Put the calcium carbide particle prepared in 600 to react with water, to obtain acetylene.
According to embodiment of the present utility model, acetylene benzene reactor 800 has acetylene entrance 801, carbon dioxide entrance
802nd, carbon monoxide inlet 803, hydrogen inlet 804, methane entrance 805 and benzene product exit 806, acetylene entrance 801 and acetylene
Outlet 703 is connected, and carbon dioxide entrance 802 is connected with carbon dioxide outlet 203, and carbon monoxide inlet 803 goes out with carbon monoxide
Mouth 503 is connected, and thermal response occurs for the acetylene that acetylene benzene reactor 800 is suitable to prepare in acetylene generator 700, so as to
Obtain benzo by-product ethene.It will be appreciated to those of skill in the art that acetylene benzene reactor is by heating furnace and at least one
Quartz ampoule is constituted, and has flat-temperature zone in heating furnace, and above-mentioned mixed gas enters heating furnace flat-temperature zone by quartzy tube inlet, passed through
Thermal response obtains benzo by-product ethene, and obtained benzene and ethene is exported from quartz ampoule to flow out.
According to embodiment of the present utility model, quartzy bore is 1 with flat-temperature zone length ratio：(50~100).Inventor
It was found that, the thermal field inside the ratio regular meeting influence reaction tube of quartzy bore and constant temperature section length, so as to change the conversion of thermal response
Rate and selectivity.
According to embodiment of the present utility model, the temperature of quartz ampoule entrance and exit can be not higher than 200 degrees Celsius.Invention
People has found, when the temperature in metal tubes is more than 200 degrees Celsius, and the metal in pipeline can a large amount of hydrogen of catalytic reaction gas generation
And carbon monoxide, the yield of other products such as benzene and ethene is almost reduced to 0.
According to embodiment of the present utility model, above-mentioned thermal response can be carried out under 600~1000 degrees Celsius.Invention human hair
Existing, when reaction temperature is too low, conversion of alkyne is substantially reduced；When reaction temperature is too high, the reaction aggravation of ethene hot polymerization is reduced
The yield of the lighter products such as benzene simultaneously adds coke yield.
According to preferred embodiment of the present utility model, above-mentioned thermal response can be carried out under 850~950 degrees Celsius.Invention
People is had found, thermal response is carried out at such a temperature, the efficiency, energy consumption and yield of thermal response can be made optimal.
According to one embodiment of the present utility model, acetylene, hydrogen, methane, carbon dioxide and carbon monoxide in thermal response
Mixed proportion be not particularly restricted, those skilled in the art can be selected according to actual needs, new according to this practicality
Acetylene in the specific embodiment of type, thermal response, hydrogen, methane, the volume ratio of carbon dioxide and carbon monoxide can be (1~2)：
(1~4)：(1~2)：(1~3)：(0.5~1).Inventor is by many experiments it was unexpectedly observed that the change of acetylene ratio can shadow
Ring the conversion ratio of acetylene and the yield of coke；Hydrogen ratio, which changes, can influence the yield of the hydrogenation products such as coke and ethene, ethane；
Methane and carbon monoxide ratio, which change, can influence coke yield；Carbon dioxide ratio, which changes, can influence the partial pressure of reaction gas, so that
Influence reaction depth.Acetylene yield can be further improved from there through using said ratio.
According to embodiment of the present utility model, there is separator 900 benzene product inlet 901, ethene outlet 902 and benzene to go out
Mouth 903, benzene product inlet 901 is connected with benzene product with outlet 806, and separator 900 is suitable in acetylene benzene reactor 800
The benzene of acquisition and the ethylene separation of by-product.
Thus, passed through according to the system for preparing benzene and ethene by coal of the utility model embodiment respectively by lime stone and coal
Carry out the broken processing of powder and obtain lime stone particle and coal dust end, and then lime stone particle is fired processing, obtain quick lime
And carbon dioxide, after the last mixed-forming of quick lime powder and coal dust, obtained material pelletizing obtains calcium carbide and one through calcium carbide reaction
Carbonoxide, calcium carbide and water are further reacted, acetylene is obtained, finally by acetylene and hydrogen, methane, the dioxy for above reacting generation
Change carbon and carbon monoxide mixing is passed through acetylene benzene reactor and reacted, to obtain target product benzo by-product ethene, enter
And separated the two by separator.Implement to prepare by coal system using the system of the present utility model for preparing benzene and ethene by coal
The method of standby benzene and ethene, which prepares benzene and can realized, prepare benzene using coal maximization, the yield of benzene is drastically increased, so that real
Now from the conversion of benzene of the coal of low value to high added value, and with flow is simple, difficulty of processing is low, process costs are low and economy
The high advantage of property.
The system that benzene is prepared by coal of the utility model above-described embodiment is understood for convenience, below with reference to Fig. 3 to utilizing
The method that the system prepares benzene is described.
S100：Coal is subjected to break process,
According to embodiment of the present utility model, coal is subjected to break process, to obtain coal dust end.It is possible thereby to further
The contact area of coal and quick lime is improved, reaction efficiency is improved.
According to embodiment of the present utility model, coal can be not higher than 10wt% high-quality coal for volatile matter.Waved in coal
When hair point is higher, coal is directly entered the gas produced in furnace of calcium carbide, furnace of calcium carbide with quick lime excessively, easily causes the material that collapses, and
Improve the power consumption of furnace of calcium carbide.According to specific example of the present utility model, coal can preferred semi-coke.
According to embodiment of the present utility model, the average grain diameter at coal dust end can be not higher than 20 microns, preferably no greater than 10
Micron.Inventor is had found, coal is finely ground into micron level, can specifically wear into not higher than 20 microns of coal dust end, it is possible thereby to
So that coal dust end and the contact area of quick lime powder are significantly increased, and then the reaction energy of the two is significantly reduced, improve the two
Reaction efficiency.
S200：Lime stone is fired processing
According to embodiment of the present utility model, lime stone is fired to processing in limekiln, to obtain quick lime
And carbon dioxide.Specifically, lime stone is that calcium carbonate content is higher (typically more than 97%), the less lime stone of impurity.
In the step, lime stone is fired to processing in limekiln, to obtain quick lime and carbon dioxide.Specifically
, first lime stone is transported to limekiln preheating zone and preheated, after preheating, then by lime stone transport to fire area burnt
System, obtained carbon dioxide can be prepared during benzene reacts as diluent follow-up, reduced the partial pressure of reaction gas, reduced carbon deposit.
According to embodiment of the present utility model, the temperature of limekiln preheating zone is 800~850 degrees Celsius.Inventor's discovery,
Preheating zone temperature is too low, then is unable to reach pre-heat effect, causes subsequently to fire reaction efficiency reduction；And preheating zone temperature is too high,
Then easily cause the loss of lime stone.
According to embodiment of the present utility model, the temperature in limekiln firing area is 900~1100 degrees Celsius.Invention human hair
It is existing, if the temperature for firing area is too low, lime stone can not be made to be fully converted into quick lime and carbon dioxide；And if firing area
Temperature is too high, then can raise energy consumption and occur side reaction, causes the yield of quick lime and carbon dioxide and reduces.
S300：Quick lime is subjected to break process
In the step, quick lime is subjected to break process, to obtain quick lime powder.It is possible thereby to further improve life
Lime powder and the contact area at coal dust end.
According to embodiment of the present utility model, the average grain diameter of quick lime powder is not higher than 20 microns, preferably no greater than 10
Micron.Inventor is had found, quick lime is finely ground into micron level, not higher than 10 microns of quick lime powder can be specifically worn into,
It is possible thereby to so that coal dust end and the contact area of quick lime powder are significantly increased, and then the reaction energy of the two is significantly reduced, carry
The high reaction efficiency of the two.
S400：Mixing and pressure ball processing
According to embodiment of the present utility model, coal dust end and quick lime powder mix and pressure ball is handled, so as to
To material pelletizing.
According to one embodiment of the present utility model, coal dust end and the mixed proportion of quick lime powder are not limited especially
System, those skilled in the art can be selected according to actual needs, according to a specific embodiment of the present utility model, coal dust
End can be according to mass ratio (0.6~0.8) with quick lime powder：1 carries out mixed processing, when coal powder mixture ratio is too high, furnace of calcium carbide
Carbon residue is higher in discharging, and quick lime is superfluous when too low, and influence produces electricity stone quality.
S500：Carry out calcium carbide reaction
In the step, the material pelletizing prepared in S400 is supplied to furnace of calcium carbide and carries out calcium carbide reaction, to obtain
Calcium carbide and carbon monoxide.Wherein, the carbon monoxide obtained can as follow-up acetylene benzene thermal response fuel gas, it is possible thereby to
Further reduce the cost and energy consumption of the method for the present utility model that benzene and ethene are prepared by coal.
S600：Calcium carbide is prepared into acetylene
In the step, the calcium carbide prepared in S500 is reacted in acetylene generator with water after crushing, so as to
To acetylene.
According to embodiment of the present utility model, calcium carbide can be crushed to particle diameter not higher than 80mm, preferably calcium carbide is crushed
It is 50~80mm to particle diameter.Inventor has found, if the particle diameter of calcium carbide is excessive, can not fully be reacted with water and prepare second
Alkynes, and can raise required energy consumption；And if calcium carbide is crushed into smaller particle, then can significantly improve the cost of break process.
Inventor is had found by many experiments, and calcium carbide is crushed into particle diameter for 50~80mm, can ensure that break process cost is relatively low
While, make to prepare the reaction efficiency of acetylene, energy consumption and yield optimal.
S700：Acetylene is prepared into benzo by-product ethene
In the step, the titanium dioxide that will be prepared in the acetylene prepared in step S600 and hydrogen, methane, S200
The carbon monoxide prepared in carbon and S400 is passed through in acetylene benzene reactor concurrent pyrogenic reaction, to obtain benzo pair
Produce ethene.It will be appreciated to those of skill in the art that acetylene benzene reactor is made up of heating furnace and at least one quartz ampoule,
And there is flat-temperature zone in heating furnace, above-mentioned mixed gas enters heating furnace flat-temperature zone by quartzy tube inlet, obtained by thermal response
Benzo by-product ethene, obtained benzene and ethene is exported from quartz ampoule to flow out.
According to embodiment of the present utility model, quartzy bore is 1 with flat-temperature zone length ratio：(50~100).Inventor
It was found that, the thermal field inside the ratio regular meeting influence reaction tube of quartzy bore and constant temperature section length, so as to change the conversion of thermal response
Rate and selectivity.
According to embodiment of the present utility model, the temperature of quartz ampoule entrance and exit can be not higher than 200 degrees Celsius.Invention
People has found, when the temperature in metal tubes is more than 200 degrees Celsius, and the metal in pipeline can a large amount of hydrogen of catalytic reaction gas generation
And carbon monoxide, the yield of other products such as benzene and ethene is almost reduced to 0.
According to embodiment of the present utility model, above-mentioned thermal response can be carried out under 600~1000 degrees Celsius.Invention human hair
Existing, when reaction temperature is too low, conversion of alkyne is substantially reduced；When reaction temperature is too high, the reaction aggravation of ethene hot polymerization is reduced
The yield of the lighter products such as benzene simultaneously adds coke yield.
According to preferred embodiment of the present utility model, above-mentioned thermal response can be carried out under 850~950 degrees Celsius.Invention
People is had found, thermal response is carried out at such a temperature, the efficiency, energy consumption and yield of thermal response can be made optimal.
According to one embodiment of the present utility model, acetylene, hydrogen, methane, carbon dioxide and carbon monoxide in thermal response
Mixed proportion be not particularly restricted, those skilled in the art can be selected according to actual needs, new according to this practicality
Acetylene in the specific embodiment of type, thermal response, hydrogen, methane, the volume ratio of carbon dioxide and carbon monoxide can be (1~2)：
(1~4)：(1~2)：(1~3)：(0.5~1).Inventor is by many experiments it was unexpectedly observed that the change of acetylene ratio can shadow
Ring the conversion ratio of acetylene and the yield of coke；Hydrogen ratio, which changes, can influence the yield of the hydrogenation products such as coke and ethene, ethane；
Methane and carbon monoxide ratio, which change, can influence coke yield；Carbon dioxide ratio, which changes, can influence the partial pressure of reaction gas, so that
Influence reaction depth.Acetylene yield can be further improved from there through using said ratio.
Thus, the method for preparing benzene and ethene by coal according to the utility model embodiment to pass through that carry out powder by coal broken
Reason obtains coal dust end, and fired rear crush of lime stone is obtained into quick lime powder, coal dust end is mixed into ball processed with quick lime powder
Group, and material pelletizing is obtained into calcium carbide and carbon monoxide through calcium carbide reaction, further calcium carbide and water are reacted, acetylene is obtained, most
Acetylene and hydrogen, methane, the carbon dioxide and carbon monoxide that above react generation are mixed and be passed through acetylene benzene reactor and enter afterwards
Row reaction, to obtain target product benzo by-product ethene.Using the method system of the present utility model that benzene and ethene are prepared by coal
Standby benzene, which can be realized, prepare benzene using coal maximization, the yield of benzene be drastically increased, so as to realize from the coal of low value to height
The conversion of the benzene of added value, and have the advantages that flow is simple, difficulty of processing is low, process costs are low and economy is high.
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
Lime stone is transported to limekiln and is fired, limekiln preheating zone temperature control is below 850 DEG C, firing temperature
Control is at 1000 DEG C or so.Anthracite and calcium lime powder are broken to less than 20 μm, compare 2 by coal and Lime Quality:3 mixing, are mixed
Material after conjunction enters press ball device and carries out pressure ball, and the pelletizing of shaping is fitted into the elevated bunker of system for producing calcium carbide, is reloaded into
Furnace of calcium carbide produces calcium carbide.The calcium carbide cooling crush produced, by the size controlling of calcium carbide between 50~80mm, into acetylene hair
Reaction obtains acetylene in raw device.Calcium carbide burner gas obtains carbon monoxide and a small amount of hydrogen after purification and reacted as acetylene benzene
The fuel gas of system.By the system, using 630kg anthracites and 1700kg lime stones as raw material, limekiln can obtain 904kg lifes
Lime and 703kg carbon dioxide, furnace of calcium carbide can obtain 980kg or so calcium carbide, 425kg carbon monoxide and a small amount of hydrogen, finally
Produce 350kg or so acetylene.Acetylene benzene is passed through after acetylene, carbon dioxide, carbon monoxide and the hydrogen of gained, methane blended
Reacted in reactor, gas volume compares acetylene：Methane：Hydrogen：Carbon dioxide：Carbon monoxide is 1:1:3:1.2:0.5, mix
The reaction time for closing gas is 10s, and reaction temperature is 900 DEG C, and reactor uses the pipe being made up of internal diameter for 4mm quartz ampoule
Beam, reactor flat-temperature zone is 300mm.Production obtains 174kg benzene and 100kg 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 to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present utility model or example.In this manual, to the schematic table of above-mentioned term
State and be necessarily directed to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be with
Combined in an appropriate manner in any one or more embodiments or example.In addition, in the case of not conflicting, this area
Technical staff the not be the same as Example or the feature of example and non-be the same as Example or example described in this specification can be entered
Row is combined and combined.
Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is
Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is in scope of the present utility model
It is interior above-described embodiment to be changed, changed, replaced and modification.
Claims (1)
1. a kind of system that benzene and ethene are prepared by coal, it is characterised in that including：
Coal breaker, the coal breaker has coal entrance and coal dust outlet；
There is preheating zone in limekiln, the limekiln and area is fired, the preheating zone has lime stone entrance, the firing area
With quick lime outlet and carbon dioxide outlet；
Quick lime breaker, the quick lime breaker has quick lime entrance and quick lime powder outlet, the raw stone
Grey entrance is connected with quick lime outlet；
Batch mixing press ball device, the batch mixing press ball device has quick lime powder entrance, coal powdering inlet and the outlet of material pelletizing,
The quick lime powder entrance is connected with quick lime powder outlet, the coal powdering inlet and the coal dust outlet phase
Even；
Furnace of calcium carbide, the furnace of calcium carbide has material pelletizing entrance, calcium carbide outlet and carbon monoxide outlet, the material pelletizing entrance
It is connected with material pelletizing outlet；
Calcium carbide crushing device, the calcium carbide crushing device has calcium carbide entrance and the outlet of calcium carbide particle, the calcium carbide entrance and institute
Calcium carbide outlet is stated to be connected；
Acetylene generator, the acetylene generator has calcium carbide particle entrance, water inlet and acetylene outlet, and the calcium carbide particle enters
Mouth is connected with calcium carbide particle outlet；
Acetylene benzene reactor, the benzene reactor processed has acetylene entrance, carbon dioxide entrance, carbon monoxide inlet, hydrogen
Entrance, methane entrance and benzene product exit, the acetylene entrance are connected with acetylene outlet, the carbon dioxide entrance and institute
State carbon dioxide outlet to be connected, the carbon monoxide inlet is connected with carbon monoxide outlet；
Separator, the separator have benzene product inlet, ethene outlet and benzene outlet, the benzene product inlet with it is described
Benzene product exit is connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621361140.2U CN206318897U (en) | 2016-12-12 | 2016-12-12 | The system that benzene and ethene are prepared by coal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621361140.2U CN206318897U (en) | 2016-12-12 | 2016-12-12 | The system that benzene and ethene are prepared by coal |
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| CN206318897U true CN206318897U (en) | 2017-07-11 |
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| CN201621361140.2U Expired - Fee Related CN206318897U (en) | 2016-12-12 | 2016-12-12 | The system that benzene and ethene are prepared by coal |
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| CN (1) | CN206318897U (en) |
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