CN107827689A - A kind of coal plasma pyrolysis combines the system and method for preparing acetylene with gasification gas - Google Patents
A kind of coal plasma pyrolysis combines the system and method for preparing acetylene with gasification gas Download PDFInfo
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- CN107827689A CN107827689A CN201711184146.6A CN201711184146A CN107827689A CN 107827689 A CN107827689 A CN 107827689A CN 201711184146 A CN201711184146 A CN 201711184146A CN 107827689 A CN107827689 A CN 107827689A
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- C—CHEMISTRY; METALLURGY
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
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- C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
- C07C1/02—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon from oxides of a carbon
- C07C1/04—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon from oxides of a carbon from carbon monoxide with hydrogen
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- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
- C07C1/02—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon from oxides of a carbon
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Abstract
Combine the system and method for preparing acetylene with gasification gas present invention relates particularly to a kind of coal plasma pyrolysis, including：Plasma pyrolysis unit, quenching unit, slurrying unit, coal water slurry gasification unit, pulverized coal preheating mixed cell, multi-phase separation unit and gas separation unit, coal and gasification gas plasma copyrolysis, pyrolysis solid product gasification, high-temperature gasification gas are coupled to technologies such as pulverized coal preheatings, improve the effective rate of utilization of feed coal and the conversion ratio of coal acetylene；Meanwhile the energy consumption of process is reduced, for a kind of the efficient using effective way is provided of plasma pyrolysis solid product, both reduce the wasting of resources, turn avoid environmental pollution.
Description
Technical field
The invention belongs to coal cracking technique field, and in particular to a kind of coal plasma pyrolysis is combined with gasification gas prepares second
The system and method for alkynes.
Background technology
Acetylene is a kind of very important Organic Chemicals, before oil ethylene industry is commonly used, passes through acetylene
Series of chemical can derive ethene, vinyl chloride, trichloro ethylene, vinyl acetate, acrylonitrile, polyacrylonitrile, neoprene
The chemical products such as rubber.In addition, acetylene also plays very important effect in fields such as intermetallic composite coating, welding, cuttings.
The conventional method of industrial production acetylene has calcium carbide Hydrolyze method and methane portion oxidation method, both approaches development time
Longer, technics comparing is ripe, but shortcoming is obvious.High, high to equipment requirement, seriously polluted, the flourishing state of calcium carbide Hydrolyze method power consumption
Family closed the process units of this method successively before more than ten years.The acetylene in China more than 90% is obtained by calcium carbide Hydrolyze method, but
With the adjustment of industrial policy and energy policy, the development space of calcium carbide Hydrolyze method is increasingly compressed.Although methane portion oxidation method
Less pollution, but technical sophistication, investment are greatly.
Coal is the main fossil energy in China, and it is to alleviate oil shortage, ensure that the energy is pacified that the high-efficiency cleaning of coal, which utilizes,
Full key.Plasma pyrolysis alkane acetylene technology comes across early in the twentieth century, the technology using hydrogen plasma high temperature,
Gao Han, rich in active ion the characteristics of.CO is not produced additionally in whole technical process2, and reusable edible few with water.Therefore,
The technology is a kind of typical cleaning, efficient alkane transformations process, has good development prospect.
The technical process of coal plasma pyrolysis is that coal dust is produced into acetylene, ethene etc. in the case where hydrogen plasma cracks environment
Raw material of industry gas, can break the tradition of calcium carbide legal system acetylene, be a kind of effective way for efficiently utilizing coal resources again.But
Can plasmas to crack solid coal product quantum of output be very big, effectively a whole set of using coal pyrolysis in plasma producing acetylene is directly affected
The economy of technique.Solid product carbon content is high, reactivity is strong, initial porosity is high, is a kind of valuable carbon resource.It is if straight
Connect and solid product is made into fuel use, its particle diameter is small, operating difficulties, easily causes dust pollution；If abandon or ignore, both
It is the wasting of resources, easily causes environmental pollution again.Therefore either economically still from the angle of the utilization of resources, environmental protection
Degree considers that the research on utilization of plasmas to crack solid coal product is all significant.
The content of the invention
Combine in view of the deficiencies of the prior art, the present invention provides a kind of coal plasma pyrolysis with gasification gas and prepare acetylene
System and method, by coal with gasification gas plasma copyrolysis, pyrolysis solid product gasification, high-temperature gasification gas to pulverized coal preheating etc.
Technology is coupled, and improves the effective rate of utilization of feed coal and the conversion ratio of coal acetylene；Meanwhile the energy consumption of process is reduced,
For a kind of the efficient using effective way is provided of plasma pyrolysis solid product, both reduce the wasting of resources, turn avoid ring
Pollute in border.
To solve the above problems, the technical solution adopted by the present invention is：
A kind of coal plasma pyrolysis combines the system for preparing acetylene with gasification gas, including：Plasma pyrolysis unit, quenching list
Member, multi-phase separation unit and gas separation unit, wherein,
The plasma pyrolysis unit has coal dust and gasification gas mixing entrance, hydrogen inlet, hydrogen mixed gas entrance and split
Solve product exit；
The feeding mouth of the quenching unit connects with pyrolysis product outlet, discharging opening and the multiphase of the quenching unit
The feeding mouth connection of separative element, after pyrolysis product quenching, it is sent into after the multi-phase separation unit carries out multi-phase separation and obtains
Admixture of gas；
The gas mixture inlet of the gas separation unit is connected with the gas mixture outlet of the multi-phase separation unit, institute
State admixture of gas and carry out gas separating treatment in the gas separation unit, respectively obtain acetylene and hydrogen mixed gas；
The hydrogen mixed gas of the gas separation unit is connected with the hydrogen mixed gas entrance, by the hydrogen mixed gas through institute
State hydrogen mixed gas entrance and deliver to the plasma pyrolysis unit.
Further, in addition to：Slurrying unit,
The slurrying unit is connected with the quenching unit, multi-phase separation unit respectively, respectively by quenching caused by quenching unit
Unreacted carbonaceous solids, sewage are delivered in the slurrying unit caused by sewage and multi-phase separation unit；
The slurrying unit has additive entrance, and additive is prepared with the quenching sewage, sewage, unreacted carbonaceous solids
Water-coal-slurry.
Further, in addition to：Coal water slurry gasification unit,
The coal water slurry gasification unit is connected with the slurrying unit, and the water-coal-slurry is gasified；
The coal water slurry gasification unit has oxygen intake.
Further, in addition to：Pulverized coal preheating mixed cell,
The pulverized coal preheating mixed cell is connected with the coal water slurry gasification unit, will be high caused by the coal water slurry gasification unit
Wet pneumatic transmission is mixed with coal dust into the preheating mixed cell, preheated；
The coal dust of the pulverized coal preheating mixed cell is connected with gasification gas mixed export with the coal dust with gasification gas mixing entrance.
Further, in addition to：Raw coal fragmentation cell,
The raw coal fragmentation cell is connected with the pulverized coal preheating mixed cell, and broken raw coal is delivered into the pulverized coal preheating and mixed
Close in unit；
The raw coal fragmentation cell is connected with run coal bin.
A kind of coal plasma pyrolysis combines the method for preparing acetylene with gasification gas, comprises the following steps：
1）Hydrogen is passed through into plasma pyrolysis unit, by the coal dust of mixing and gasification pneumatic transmission to the plasma pyrolysis list
Moment cracks after member, coal dust and gasification gas run into hydrogen plasma, generates pyrolysis product；
2）Pyrolysis product is subjected to quenching, obtains the gentle solidliquid mixture of quenching sewage；
3）Gas-solid liquid mixture is delivered into the multi-phase separation unit, isolated unreacted carbonaceous solids, sewage and gas
Mixture；
4）Admixture of gas is delivered into the gas separation unit, isolated acetylene and hydrogen mixed gas, meanwhile, hydrogen is mixed
Pneumatic transmission is closed to the plasma pyrolysis unit as plasma medium.
Further, by step 2）With step 3）In obtained the quenching sewage, sewage and unreacted carbonaceous solids
Deliver in slurrying unit and prepare water-coal-slurry, it is 65% to prepare the mass ratio of carbonaceous solids and sewage in the raw material of water-coal-slurry：34% to
72%：25%；The concentration of the water-coal-slurry of preparation is 57%-70%.
Further, the water-coal-slurry is delivered into the gasification of coal water slurry gasification unit, and by obtained gasification pneumatic transmission to coal dust
Mixed cell is preheated, carbon dioxide volume constituents are 12-17%, carbon monoxide volume constituents 45-50%, hydrogen in the gasification gas
Volume constituents are 33-38%；
The gasification gas mixes with coal dust and utilizes the heat for the gas that gasifies coal water slurry gasification temperature is 1200- to pulverized coal preheating
1400℃。
Further, the raw coal in run coal bin is broken for coal dust through the raw coal fragmentation cell, coal dust is delivered into coal dust
Preheat in mixed cell；The particle diameter of the coal dust is less than 100 microns.
Further, the volume content of acetylene is 65%-85% in the admixture of gas；The plasma pyrolysis unit
The volume ratio of middle gasification gas and hydrogen is 2:1 to 1:1.
The beneficial effects of the present invention are：By coal and gasification gas plasma copyrolysis, pyrolysis solid product gasification, high temperature
Gasification gas is coupled to technologies such as pulverized coal preheatings, improves the effective rate of utilization of feed coal and the conversion ratio of coal acetylene；Meanwhile
The energy consumption of process is reduced, for a kind of the efficient using effective way is provided of plasma pyrolysis solid product, has both reduced money
Source wastes, and turn avoid environmental pollution.
Brief description of the drawings
Fig. 1 is that coal plasma pyrolysis of the present invention combines the system schematic for preparing acetylene with the gas that gasifies.
Fig. 2 is that coal plasma pyrolysis of the present invention combines the method schematic diagram for preparing acetylene with the gas that gasifies.
Wherein, the plasma pyrolysis unit 5. of 1. run coal bin, 2. raw coal fragmentation cell, 3. pulverized coal preheating mixed cell 4.
The gas separation unit a. raw coal b. of 8. coal water slurry gasification unit of quenching unit 6. multi-phase separation unit, 7. slurrying unit 9.
Hydrogen c. oxygen d. additive e. sewage f. acetylene g. hydrogen mixed gas.
Embodiment
In order that those skilled in the art more fully understand technical scheme, with reference to specific embodiment to this
Invention is described in further detail.It is exemplary for note that the embodiments described below, is only used for explaining the present invention, and
It is not considered as limiting the invention.Unreceipted particular technique or condition in embodiment, according to document institute in the art
The technology or condition of description are carried out according to product description.Agents useful for same or the unreceipted production firm person of instrument, being can
To pass through the conventional products of acquisition purchased in market.
According to an aspect of the present invention, combine the invention provides a kind of coal plasma pyrolysis with gasification gas and prepare second
The system of alkynes, Fig. 1 are that coal plasma pyrolysis of the present invention combines the system schematic for preparing acetylene with the gas that gasifies, as shown in figure 1,
Mainly include plasma pyrolysis unit, quenching unit, multi-phase separation unit and gas separation unit, wherein, the plasma
There is body cracking unit coal dust to be exported with gasification gas mixing entrance, hydrogen inlet, hydrogen mixed gas entrance and pyrolysis product；It is described
The feeding mouth of quenching unit connects with pyrolysis product outlet, the discharging opening of the quenching unit and the multi-phase separation unit
Feeding mouth connection, after pyrolysis product quenching, be sent into after the multi-phase separation unit carries out multi-phase separation and obtain gas mixing
Thing；The gas mixture inlet of the gas separation unit is connected with the gas mixture outlet of the multi-phase separation unit, institute
State admixture of gas and carry out gas separating treatment in the gas separation unit, respectively obtain acetylene and hydrogen mixed gas；It is described
The hydrogen mixed gas of gas separation unit is connected with the hydrogen mixed gas entrance, and the hydrogen mixed gas is mixed through the hydrogen
Close gas entrance and deliver to the plasma pyrolysis unit.
Hydrogen is passed through into plasma pyrolysis unit, produces hydrogen plasma, the gas-solid mixture of coal dust and gasification gas
Into plasma pyrolysis unit, after gas-solid mixture runs into hydrogen plasma moment crack, generate pyrolysis product, will split
Solution product carries out quenching in quenching unit, obtains the gentle solidliquid mixture of quenching sewage, admixture of gas is delivered into the gas
Body separative element, isolated acetylene and hydrogen mixed gas, meanwhile, hydrogen mixed gas is delivered into the plasma pyrolysis unit
As plasma medium.
Thus, coal plasma pyrolysis of the invention combines the system for preparing acetylene with gasification gas, by coal and the gas etc. that gasifies
Gas ions copyrolysis, pyrolysis solid product gasification, high-temperature gasification gas are coupled to technologies such as pulverized coal preheatings, improve feed coal
The conversion ratio of effective rate of utilization and coal acetylene；Meanwhile the energy consumption of process is reduced, it is the height of plasma pyrolysis solid product
Effect both reduces the wasting of resources, turn avoid environmental pollution using a kind of effective way is provided.
According to a particular embodiment of the invention, present invention additionally comprises slurrying unit, coal water slurry gasification unit and pulverized coal preheating
Mixed cell, the slurrying unit are connected with the quenching unit, multi-phase separation unit respectively, respectively by caused by quenching unit
Unreacted carbonaceous solids, sewage are delivered in the slurrying unit caused by quenching sewage and multi-phase separation unit；The slurrying
Unit has additive entrance, and additive prepares water-coal-slurry with the quenching sewage, sewage, unreacted carbonaceous solids.It is described
Coal water slurry gasification unit is connected with the slurrying unit, and the water-coal-slurry is gasified；The coal water slurry gasification unit has
Oxygen intake.The pulverized coal preheating mixed cell is connected with the coal water slurry gasification unit, and the coal water slurry gasification unit is produced
Raw high-temperature gasification pneumatic transmission is mixed with coal dust into the preheating mixed cell, preheated；The coal of the pulverized coal preheating mixed cell
Powder is connected with gasification gas mixed export with the coal dust with gasification gas mixing entrance.
Sewage caused by During Quenching is used for the pulping water of water-coal-slurry by the present invention, reduces sewage disposal expense, utilizes
Then coal dust and gasification gas are cracked to pulverized coal preheating, drastically increase raw material by gasification gas caused by coal water slurry gasification together
The effective rate of utilization of coal and the conversion ratio of coal acetylene.
According to a particular embodiment of the invention, present invention additionally comprises raw coal fragmentation cell, the raw coal fragmentation cell and institute
The connection of pulverized coal preheating mixed cell is stated, broken raw coal is delivered in the pulverized coal preheating mixed cell；The raw coal is broken single
Member is connected with run coal bin.The concrete structure for raw coal fragmentation cell of the present invention does not limit particularly, it is allowed to using a variety of
Structure type, such as disintegrating machine.
According to another aspect of the present invention, Fig. 2 combines for coal plasma pyrolysis of the present invention with gasification gas prepares acetylene
Method schematic diagram, as shown in Fig. 2 combining with gasification gas using coal plasma pyrolysis the invention provides a kind of and preparing acetylene
The method that system prepares acetylene, specifically includes following steps：
1）Hydrogen is passed through into plasma pyrolysis unit, by the coal dust of mixing and gasification pneumatic transmission to the plasma pyrolysis list
Moment cracks after member, coal dust and gasification gas run into hydrogen plasma, generates pyrolysis product, wherein, the plasma splits
The volume ratio for solving gasify in unit gas and hydrogen is 2:1 to 1:1；
2）Pyrolysis product is subjected to quenching, obtains the gentle solidliquid mixture of quenching sewage；
3）Gas-solid liquid mixture is delivered into the multi-phase separation unit, isolated unreacted carbonaceous solids, sewage and gas
Mixture, the volume content of acetylene is 65%-85% in the admixture of gas；
4）By step 2）With step 3）In obtained the quenching sewage, sewage and unreacted carbonaceous solids deliver to slurrying unit
Middle preparation water-coal-slurry, it is 65% to prepare the mass ratio of carbonaceous solids and sewage in the raw material of water-coal-slurry：34% to 72%：25%；Prepare
The concentration of water-coal-slurry be 57%-70%；
5）The water-coal-slurry is delivered into the gasification of coal water slurry gasification unit, and obtained gasification pneumatic transmission to pulverized coal preheating is mixed into list
Member, it is described gasification gas in carbon dioxide volume constituents be 12-17%, carbon monoxide volume constituents 45-50%, hydrogen volume component be
33-38%；The gasification gas mixes with coal dust and utilizes the heat for the gas that gasifies coal water slurry gasification temperature is 1200- to pulverized coal preheating
1400℃；
6）Admixture of gas is delivered into the gas separation unit, isolated acetylene and hydrogen mixed gas, meanwhile, hydrogen is mixed
Pneumatic transmission is closed to the plasma pyrolysis unit as plasma medium.
It should be noted that step 5）In, the component for the gas that gasifies is relevant with feed coal property and operating condition, and certain coal sample exists
In gasification gas under 1350 degrees Celsius carbon dioxide volume constituents be 14.%, carbon monoxide volume constituents 49%, hydrogen volume component
35%.The benefit of gasification gas composition：Hydrogen component content is high, is advantageous to participate in plasma pyrolysis generation acetylene below.
Thus, by means of the invention it is also possible to improve the effective rate of utilization of feed coal and the conversion ratio of coal acetylene, together
When, the energy consumption of process is reduced, is both to reduce for a kind of the efficient using effective way is provided of plasma pyrolysis solid product
The wasting of resources, it turn avoid environmental pollution.
According to a particular embodiment of the invention, method of the invention also includes breaking the raw coal in run coal bin through the raw coal
Broken unit is broken for coal dust, and coal dust is delivered in pulverized coal preheating mixed cell；The particle diameter of the coal dust is less than 100 microns.Will be broken
High-temperature gasification qi leel caused by coal dust and solid product coal water slurry gasification after broken does not feed coal dust mixing preheating unit, and gasify gas
Coal dust directly preheat and mixed with coal dust, forms gas-solid quasi-fluid.
Embodiment one
（1）Raw coal will be dried break process is carried out in raw coal fragmentation cell, obtain the coal dust that granularity is less than less than 100 microns；
（2）Hydrogen is passed through into plasma pyrolysis unit, by the coal dust of mixing and gasification pneumatic transmission to the plasma pyrolysis
Moment cracks after unit, coal dust and gasification gas run into hydrogen plasma, generates pyrolysis product, wherein, cracking temperature is
2000 degree；
（3）Pyrolysis product is subjected to quenching, obtains the gentle solidliquid mixture of quenching sewage；
（4）Gas-solid liquid mixture is delivered into the multi-phase separation unit, isolated unreacted carbonaceous solids, sewage and gas
Mixture, the volume content of acetylene is 65%-85% in the admixture of gas；
（5）The quenching sewage, sewage and unreacted carbonaceous solids are delivered in slurrying unit and prepare water-coal-slurry, prepare water coal
The mass ratio of carbonaceous solids and sewage is 65% in the raw material of slurry：34% to 72%：25%；The concentration of the water-coal-slurry of preparation is 57%-
70%；
（6）The water-coal-slurry is delivered into the gasification of coal water slurry gasification unit, and obtained gasification pneumatic transmission to pulverized coal preheating is mixed into list
Member, the gasification gas mix with coal dust and utilize the heat for the gas that gasifies to be mixed to pulverized coal preheating and with coal dust, form gas-solid like stream
Body；The volume ratio 1.5 of gasification gas and hydrogen:1；
（7）The coal dust of mixing and gasification pneumatic transmission to the plasma pyrolysis unit, coal dust and gasification gas are run into hydrogen plasma
Moment cracks after body, generates pyrolysis product, wherein, cracking temperature is 2000 degree；Repeat step three to six；
（8）Admixture of gas is delivered into the gas separation unit, isolated acetylene and hydrogen mixed gas, meanwhile, by hydrogen
Gaseous mixture delivers to the plasma pyrolysis unit as plasma medium.
In summary, coal plasma pyrolysis of the invention combines the system for preparing acetylene with gasification gas, by coal and gasification
Gas plasma copyrolysis, pyrolysis solid product gasification, high-temperature gasification gas are coupled to technologies such as pulverized coal preheatings, by During Quenching
Caused sewage is used for the pulping water of water-coal-slurry, reduces sewage disposal expense, utilizes the gas pair that gasifies caused by coal water slurry gasification
Pulverized coal preheating, then coal dust and gasification gas are cracked together, drastically increase the effective rate of utilization and coal acetylene of feed coal
Conversion ratio；Meanwhile the energy consumption of process is reduced, for the efficient a kind of effective using providing of plasma pyrolysis solid product
Approach, both reduce the wasting of resources, turn avoid environmental pollution.
In the description of the invention, it is to be understood that term " first ", " second " are only used for describing purpose, and can not
It is interpreted as indicating or implies relative importance or imply the quantity of the technical characteristic indicated by indicating.Thus, define " the
One ", one or more this feature can be expressed or be implicitly included to the feature of " second ".
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements.For the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height and is less than second feature.
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 present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be any
Combined in an appropriate manner in individual or multiple embodiments or example.In addition, in the case of not conflicting, the technology of this area
Different embodiments or example and the feature of different embodiments or example described in this specification can be combined by personnel
And combination.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification, meanwhile, for those of ordinary skill in the art, the think of according to the application
Think, in specific embodiments and applications there will be changes.
Claims (10)
1. a kind of coal plasma pyrolysis combines the system for preparing acetylene with gasification gas, it is characterised in that including：Plasma splits
Unit, quenching unit, multi-phase separation unit and gas separation unit are solved, wherein,
The plasma pyrolysis unit has coal dust and gasification gas mixing entrance, hydrogen inlet, hydrogen mixed gas entrance and split
Solve product exit；
The feeding mouth of the quenching unit connects with pyrolysis product outlet, discharging opening and the multiphase of the quenching unit
The feeding mouth connection of separative element, after pyrolysis product quenching, it is sent into after the multi-phase separation unit carries out multi-phase separation and obtains
Admixture of gas；
The gas mixture inlet of the gas separation unit is connected with the gas mixture outlet of the multi-phase separation unit, institute
State admixture of gas and carry out gas separating treatment in the gas separation unit, respectively obtain acetylene and hydrogen mixed gas；
The hydrogen mixed gas of the gas separation unit is connected with the hydrogen mixed gas entrance, by the hydrogen mixed gas through institute
State hydrogen mixed gas entrance and deliver to the plasma pyrolysis unit.
2. system according to claim 1, it is characterised in that also include：Slurrying unit,
The slurrying unit is connected with the quenching unit, multi-phase separation unit respectively, respectively by quenching caused by quenching unit
Unreacted carbonaceous solids, sewage are delivered in the slurrying unit caused by sewage and multi-phase separation unit；
The slurrying unit has additive entrance, and additive is prepared with the quenching sewage, sewage, unreacted carbonaceous solids
Water-coal-slurry.
3. system according to claim 2, it is characterised in that also include：Coal water slurry gasification unit,
The coal water slurry gasification unit is connected with the slurrying unit, and the water-coal-slurry is gasified；
The coal water slurry gasification unit has oxygen intake.
4. the system according to claim 1 or 3, it is characterised in that also include：Pulverized coal preheating mixed cell,
The pulverized coal preheating mixed cell is connected with the coal water slurry gasification unit, will be high caused by the coal water slurry gasification unit
Wet pneumatic transmission is mixed with coal dust into the preheating mixed cell, preheated；
The coal dust of the pulverized coal preheating mixed cell is connected with gasification gas mixed export with the coal dust with gasification gas mixing entrance.
5. system according to claim 4, it is characterised in that also include：Raw coal fragmentation cell,
The raw coal fragmentation cell is connected with the pulverized coal preheating mixed cell, and broken raw coal is delivered into the pulverized coal preheating and mixed
Close in unit；
The raw coal fragmentation cell is connected with run coal bin.
6. a kind of method that system using described in claim 1-5 prepares acetylene, it is characterised in that comprise the following steps：
1）Hydrogen is passed through into plasma pyrolysis unit, by the coal dust of mixing and gasification pneumatic transmission to the plasma pyrolysis list
Moment cracks after member, coal dust and gasification gas run into hydrogen plasma, generates pyrolysis product；
2）Pyrolysis product is subjected to quenching, obtains the gentle solidliquid mixture of quenching sewage；
3）Gas-solid liquid mixture is delivered into the multi-phase separation unit, isolated unreacted carbonaceous solids, sewage and gas
Mixture；
4）Admixture of gas is delivered into the gas separation unit, isolated acetylene and hydrogen mixed gas, meanwhile, hydrogen is mixed
Pneumatic transmission is closed to the plasma pyrolysis unit as plasma medium.
7. according to the method for claim 6, it is characterised in that by step 2）With step 3）In the obtained quenching it is dirty
Water, sewage and unreacted carbonaceous solids, which are delivered in slurrying unit, prepares water-coal-slurry, prepares carbonaceous solids in the raw material of water-coal-slurry
Mass ratio with sewage is 65%：34% to 72%：25%；The concentration of the water-coal-slurry of preparation is 57%-70%.
8. according to the method for claim 6, it is characterised in that the water-coal-slurry is delivered into the gasification of coal water slurry gasification unit,
And by obtained gasification pneumatic transmission to pulverized coal preheating mixed cell, carbon dioxide volume constituents are 12-17%, one in the gasification gas
Carbonoxide volume constituents 45-50%, hydrogen volume component are 33-38%；
The gasification gas mixes with coal dust and utilizes the heat for the gas that gasifies coal water slurry gasification temperature is 1200- to pulverized coal preheating
1400℃。
9. according to the method for claim 6, it is characterised in that break the raw coal in run coal bin through the raw coal fragmentation cell
Broken is coal dust, and coal dust is delivered in pulverized coal preheating mixed cell；The particle diameter of the coal dust is less than 100 microns.
10. according to the method for claim 6, it is characterised in that
The volume content of acetylene is 65%-85% in the admixture of gas；
The volume ratio of gasification gas and hydrogen is 2 in the plasma pyrolysis unit:1 to 1:1.
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