CN109181783A - A kind of coal catalytic hydrogenation produces the method and device of methane - Google Patents
A kind of coal catalytic hydrogenation produces the method and device of methane Download PDFInfo
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- CN109181783A CN109181783A CN201811183789.3A CN201811183789A CN109181783A CN 109181783 A CN109181783 A CN 109181783A CN 201811183789 A CN201811183789 A CN 201811183789A CN 109181783 A CN109181783 A CN 109181783A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/721—Multistage gasification, e.g. plural parallel or serial gasification stages
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/093—Coal
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0973—Water
- C10J2300/0976—Water as steam
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0983—Additives
- C10J2300/0986—Catalysts
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/164—Integration of gasification processes with another plant or parts within the plant with conversion of synthesis gas
- C10J2300/1656—Conversion of synthesis gas to chemicals
- C10J2300/1662—Conversion of synthesis gas to chemicals to methane (SNG)
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/18—Details of the gasification process, e.g. loops, autothermal operation
- C10J2300/1807—Recycle loops, e.g. gas, solids, heating medium, water
Abstract
The present invention discloses the method and device that a kind of coal catalytic hydrogenation produces methane, is related to Coal Gasification Technology field, invents to produce methane.The method that the coal catalytic hydrogenation produces methane includes: coal gasification: steel slag, coal and vapor being mixed into promoting the circulation of qi, synthesis gas and iron is made, wherein the slag bag oxides-containing iron；Methane is produced: coal dust, synthesis gas obtained and iron being mixed and carry out catalytic hydrogenation gasification, methane is made and contains the semicoke of iron；Iron oxidation: carrying out gas solid separation for methane obtained, the semicoke containing iron, and the separating obtained semicoke containing iron is aoxidized again, ferriferous oxide is made, and ferriferous oxide is imported in coal gasification.The method and device that coal catalytic hydrogenation of the present invention produces methane improves the production rate of methane using two stage gasification technique using steel slag as the catalyst for producing methane, and the environment-protective circulating for realizing steel slag utilizes.
Description
Technical field
The present invention relates to methods and coal catalysis that methane is produced in Coal Gasification Technology field more particularly to a kind of coal catalytic hydrogenation
Hydrogen is added to produce the device of methane.
Background technique
Coal catalytic hydrogenation produces methane and generallys use VIII race's metal such as Fe, Co, Ni or alkali metal as catalyst, VIII race gold
Category is present in lime-ash in the form of metal simple-substance through catalytic hydrogenation reaction, needs just to be able to achieve catalyst recycling by pickling.
Acid cleaning process not only increases cost, also will cause environmental pollution, and some catalyst higher costs, therefore, the selection of catalyst
The development of entire coal catalytic hydrogenation process is restrict with recycling.
Steel slag is the waste residue generated in steelmaking process, and yield is about the 15%~20% of output of steel.Steel slag main source
The oxide formed after contained element oxide in molten iron and steel scrap, such as contain in steel slag: iron oxide (Fe2O3), four oxidation three
Iron (Fe3O4), ferrous oxide (FeO), iron (Fe), silica (SiO2), calcium oxide (CaO) and other impurities；In usual steel slag
The mass fraction respectively formed is respectively as follows: 85.56% or so Fe2O3, 10.53% or so Fe3O4, 0.58% or so FeO,
The SiO of 0.45% or so Fe, 0.20% or so2, 0.06% or so CaO, 2.62% or so remaining impurity.Steel slag at present
Pave the way mainly as the filler of mine mine pit, instead of stone, produce water quality cleansing agent etc., but these processing methods are all to environment
Secondary pollution is caused, and value-added content of product is lower.It is to push steel mill Green Sustainable that the environmental protection for solving steel slag, which utilizes,
Important measure.
Summary of the invention
The embodiment provides the method and device that a kind of coal catalytic hydrogenation produces methane, main purpose is to utilize
Steel slag improves the production rate of methane using two stage gasification technique as the catalyst for producing methane, and realizes the ring of steel slag
Guarantor recycles.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that
A kind of method that coal catalytic hydrogenation produces methane, comprising:
Coal gasification: being mixed into promoting the circulation of qi for steel slag, coal and vapor, synthesis gas and iron is made, wherein the slag bag
Oxides-containing iron；
Methane is produced: coal dust, the synthesis gas obtained and the iron being mixed and carry out catalytic hydrogenation gasification, first is made
Alkane and semicoke containing iron；
Iron oxidation: carrying out gas solid separation for the methane obtained, the semicoke containing iron, separating obtained described to contain
There is the semicoke of iron to be aoxidized again, ferriferous oxide is made, and the ferriferous oxide is imported in the coal gasification.
The method that coal catalytic hydrogenation provided in an embodiment of the present invention produces methane, by carrying out steel slag, coal and vapor
Gasification, produces the synthesis gas containing hydrogen and carbon monoxide, in coal gasification course, the ferriferous oxide in steel slag is as oxygen carrier
Body provides oxygen source for coal gasification, and ferriferous oxide is also used as catalyst, promotes the generation of synthesis gas, meanwhile, ferriferous oxide also by
It is reduced into fe；Synthesis gas obtained and iron are mixed with coal dust again and carry out catalytic hydrogenation gasification, and then methane is made, in first
In alkane generating process, iron is used as catalyst again, promotes the generation of methane, finally oxidizes iron into ferriferous oxide and imports coal gasification
In, the environment-protective circulating for continuing to be achieved steel slag as coal gasification raw material utilizes, and effectively reduces coal catalytic hydrogenation and produces first
The process costs of alkane, meanwhile, improve the economy and the feature of environmental protection of steel slag.
Optionally, in the coal gasification course: gasification temperature is 700~800 DEG C, and vapor pressure is 2.5~4.0MPa.
Optionally, in the coal gasification course: the partial size of the coal is less than or equal to 5mm, and the partial size of the steel slag is less than
Equal to 0.4mm.
Optionally, in the coal gasification course: the mass ratio of the steel slag, the vapor and the coal is 0.5~2
: 1~3: 1.
Optionally, during the methane is produced: catalytic hydrogenation gasification temperature is 750~850 DEG C, catalytic hydrogenation gasification
Pressure is 2.5~4.0MPa.
Optionally, during the methane is produced: the partial size of the coal dust is less than or equal to 0.4mm.
Optionally, during the methane is produced: the mass ratio of the iron and the coal dust is 0.04~0.1: 1.
Optionally, in the iron oxidation process: oxidizing temperature is 850~900 DEG C, and oxidative pressure is 2.5~4.0MPa.
Another aspect of the present invention embodiment additionally provides the device that a kind of coal catalytic hydrogenation produces methane, comprising: one section of gas
Change furnace；The feed inlet of two sections of gasification furnaces, two sections of gasification furnaces is connected to the discharge port of one section of gasification furnace；Gas solid separation
Device, the feed inlet of the gas-solid separator are connected to the discharge port of two sections of gasification furnaces；Oxidation regeneration furnace, the oxidation regeneration
The feed inlet of furnace is connected to the solid phase discharge port of the gas-solid separator, the discharge port of the oxidation regeneration furnace and one section of gas
Change the feed inlet connection of furnace.
Coal catalytic hydrogenation provided in an embodiment of the present invention produces the device of methane, using one section of gasification furnace and two sections of gasification furnaces
Methane is produced, coal can be made to be converted into the methane of high-purity, improves the production rate of methane, coal catalytic hydrogenation is effectively reduced and produces first
The process costs of alkane, meanwhile, the environment-protective circulating for realizing steel slag utilizes, and improves the economy and the feature of environmental protection of steel slag.
Detailed description of the invention
Fig. 1 is the flow diagram for the method that a kind of coal catalytic hydrogenation provided in an embodiment of the present invention produces methane；
Fig. 2 is the composition schematic diagram for the device that a kind of coal catalytic hydrogenation provided in an embodiment of the present invention produces methane.
Specific embodiment
The method of methane is produced to coal catalytic hydrogenation of the embodiment of the present invention with reference to the accompanying drawing and coal catalytic hydrogenation produces first
The device of alkane is described in detail.
In the description of the present invention, it is to be understood that, term " center ", "upper", "lower", "front", "rear", " left side ",
The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on the figure
Orientation or positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device of indication or suggestion meaning or
Element must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
Term " first ", " second " be used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or
Implicitly indicate the quantity of indicated technical characteristic." first " is defined as a result, the feature of " second " can be expressed or imply
Ground includes one or more of the features.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or
It is more than two.
The embodiment of the invention provides a kind of method that coal catalytic hydrogenation produces methane, referring to Fig.1, the methane of producing
The step of method includes:
S1: coal gasification: being mixed into promoting the circulation of qi for steel slag, coal and vapor, synthesis gas and iron is made, wherein the steel
Cinder ladle oxides-containing iron.
Exemplary, the ferriferous oxide in the steel slag includes: Fe2O3、Fe3O4, one of FeO or a variety of, in coal gasification
In the process, main chemical reactions are as follows:
C+H2O→CO+H2(1)；
CO+H2O→H2+CO2(2)；
C+Fe2O3→Fe3O4+CO(3)；
C+Fe3O4→FeO+CO(4)；
C+FeO→Fe+CO(5)；
Fe2O3+CO→Fe+CO2(6)；
Wherein, when being chemically reacted (1) and chemical reaction (2), ferriferous oxide promotes to generate hydrogen as catalyst
It is most with the content of the synthesis gas of carbon monoxide, hydrogen, a small amount of carbon dioxide is also had sometimes.During the reaction, iron oxygen
Compound passes to the carbon in coal as oxygen carrier, and by oxygen therein, and ferriferous oxide is reduced to iron, can also be reduced to sometimes
Lower valency ferriferous oxide, the lower valency ferriferous oxide refer to chemical combination of the chemical valence lower than iron in ferriferous oxide in reactant of iron
Synthesis gas and iron or synthesis gas, iron and lower valency ferriferous oxide is made finally after completing coal gasifying process in valence.
In order to improve coal gasification reaction efficiency, ferriferous oxide is made to give full play to catalytic action, the partial size of the coal is less than etc.
It is less than or equal to 0.4mm in the partial size of 5mm, the steel slag, is sufficient filling with steel slag around coal, increases the contact surface with coal
Product carries out bubbling fluidization gasification by gasifying agent of vapor, and the residence time is abundant, and it is anti-that steel slag can sufficiently contact progress with coal
It answers.
Exemplary, in coal gasification course, vapor pressure is 2.5~4.0MPa；Exemplary again, the vapor pressure is 3
~4MPa；Exemplary again, the vapor pressure is 3~3.5MPa.Gasification temperature is 700~800 DEG C；It is exemplary again, gasification temperature
Degree is 700~750 DEG C.At a temperature of vapor pressure described above and gasification, the reaction efficiency of coal gasification can be sufficiently ensured, protect
Demonstrate,prove the production rate of synthesis gas.
In order to ensure the reaction efficiency, the catalytic effect of catalyst and the generation yield of synthesis gas of coal gasification, in the coal
In gasification: the mass ratio of the steel slag, the vapor and the coal is 0.5~2: 1~3: 1；It is exemplary again, the steel
The mass ratio of slag, the vapor and the coal is 0.5~1.5: 1.5~3: 1；It is exemplary again, the steel slag, the vapor
Mass ratio with the coal is 0.5~1: 1.5~2.5: 1.Wherein, specific mass ratio can also be determined according to actual condition.
Since coal gasification temperature is 700~800 DEG C, and the fusing point of iron is 1538 DEG C or so, and the fusing point of FeO is 1369 DEG C of left sides
The right side, so can generate the product of two states, a kind of synthesis gas for gas phase after coal gasification reaction, another kind is solid phase,
Including coal ash, iron, possible also FeO obtains the iron of solid phase finally by sorting.
S2: methane is produced: coal dust, the synthesis gas obtained and the iron being mixed and carry out catalytic hydrogenation gasification, with system
Obtain methane and the semicoke containing iron.
In the specific producing process of methane, under the catalytic action of iron, reaction generates methane for the coal dust and hydrogen,
In, the hydrogen and carbon monoxide that coal gasification reaction generates, alternatively, hydrogen, carbon monoxide and carbon dioxide were produced as methane
The gasifying agent of coal dust catalytic hydrogenation gasification reaction in journey, wherein during methane is produced, main chemical reactions are as follows:
C+H2→CH4；
CO+H2→CH4+H2O；
CO2+H2→CH4+H2O；
Wherein, iron is catalyst in above three chemical reaction, promotes the generation of methane.
It is come into full contact with to improve coal dust with iron phase, to improve the catalytic hydrogenation gasification efficiency of coal dust, improves the production of methane
Rate, the partial size of the coal dust are less than or equal to 0.4mm, and the grain of the iron of above-mentioned coal gasification reaction generation or lower valency ferriferous oxide
For diameter also in 0.4mm or so, i.e. coal dust is suitable with the partial size of catalyst, ensures being sufficiently mixed for coal dust and catalyst.
In specific catalytic hydrogenation gasification reaction, fluidize coal dust back-mixing in synthesis gas, and catalyst flows from top to bottom
Change, further increases reaction efficiency, improve the yield of methane.
Exemplary, during the methane is produced: the mass ratio of the iron and the coal dust is 0.04~0.1: 1；Again
Exemplary, the mass ratio of the iron and the coal dust is 0.05~0.1: 1.In this way under the premise of guaranteeing reaction efficiency, avoid
The phenomenon that catalyst wastes.
In some embodiments, during the methane is produced: catalytic hydrogenation vapor pressure is 2.5~4.0MPa；Again
Exemplary, catalytic hydrogenation vapor pressure is 3~4.0MPa.Catalytic hydrogenation gasification temperature is 750~850 DEG C, is urged described above
Change hydrogasification pressure and gasification at a temperature of, can sufficiently catalytic hydrogasification reaction efficiency, guarantee the production rate of methane.
Since catalytic hydrogenation gasification temperature is 750~850 DEG C, and the fusing point of iron is 1538 DEG C or so, so in methane
It negates after answering, the product of two states, a kind of methane for gas phase can be exported, another kind is the semicoke containing iron of solid phase.
Two techniques of S1 and step S2, which combine, through the above steps produces methane, CO, H that one section of gasification generates2Synthesis
Catalytic production of methane occurs in two sections of gasification furnaces and obtains methane for gas, and corresponding methane concentration improves；And two sections not extra
CO、H2It generates, the carbon in key reaction coal, carbon is hydrogenated to methane.That is coal two stage gasification technique, compared to one section of gasification work of coal
Skill can effectively improve the production rate of methane in this way.
In order to realize recycling for catalyst, the method that the coal catalytic hydrogenation produces methane further include:
S3: the methane obtained, the semicoke containing iron iron oxidation: are subjected to gas solid separation, separating obtained institute
It states the semicoke containing iron to be aoxidized again, ferriferous oxide is made, and the ferriferous oxide be imported in the coal gasification.
In iron oxidation process, main chemical reactions are as follows:
Fe+O2→Fe2O3
Specifically, methane is produced into gas phase methane obtained afterwards and the semicoke progress gas solid separation containing solid phase iron first,
Again towards oxygen or air burning is passed through in the separating obtained semicoke containing iron, to be aoxidized to iron, in oxidation process,
Coal-char combustion provides heat, and iron oxidation generates ferriferous oxide, then by the ferriferous oxide steps for importing S1 of generation, as step S1
Oxygen carrier and catalyst in coal gasification reaction, meanwhile, ferriferous oxide also imports the heat of carrying in the coal gasification, i.e. iron
Oxide is also used as thermophore, provides heat source for coal gasification reaction, and then reduce the energy consumption of coal gasification reaction, plays energy-efficient effect
Fruit.
Exemplary, in iron oxidation process: oxidative pressure is 2.5~4.0MPa；It is exemplary again, oxidative pressure be 3~
4.0MPa.Exemplary, oxidizing temperature is 850~900 DEG C；Exemplary again, oxidizing temperature is 900 DEG C.
When it is implemented, the solid phase semicoke after separation may also can carry away part iron, to reduce the content of iron, in order to
The progress of coal gasification reaction is not influenced, the steel slag of corrresponding quality can also be supplemented in coal gasification reaction, to ensure coal gasification
Required ferriferous oxide.
Producing for methane, also effective use steel slag are not only realized using above-mentioned steps S1, step S2 and step S3, realize steel
Ferriferous oxide recycles in slag, improves the feature of environmental protection and economy of entire technique.
On the other hand the embodiment of the present invention additionally provides the device that a kind of coal catalytic hydrogenation produces methane, described referring to Fig. 2
Device includes: one section of gasification furnace, 1, two section of gasification furnace 2, gas-solid separator 3 and oxidation regeneration furnace 4；Wherein, two sections of gasification furnaces
2 feed inlet is connected to the discharge port of one section of gasification furnace 1；The feed inlet of the gas-solid separator 3 and described two sections gasifications
The discharge port of furnace 2 is connected to；The feed inlet of the oxidation regeneration furnace 4 is connected to the solid phase discharge port of the gas-solid separator 3, described
The discharge port 4 of oxidation regeneration furnace is connected to the feed inlet of one section of gasification furnace 1.
When specifically producing methane, towards one section of gasification furnace 1 in import coal, vapor and steel slag, contain iron in the steel slag
Oxide, coal gasify in one section of gasification furnace, and under the catalytic action of ferriferous oxide, generate synthesis gas, meanwhile, ferriferous oxide
Also it is being reduced into fe and lower valency ferriferous oxide, the concrete meaning of the lower valency ferriferous oxide solves in front
It releases；The synthesis gas and fe of generation are imported into two sections of gasification furnaces 2, and catalytic hydrogenation gasification reaction occurs with coal dust, are generated
Methane；Gasification separation device 3 for the iron-containing semicoke of methane gas and solid phase to be separated, the iron-containing semicoke isolated into
Enter and oxidation reaction occurs under the action of oxidation regeneration furnace, then oxygen or air, finally oxidizes iron into ferriferous oxide；Finally by iron
Oxide imports in one section of gasification furnace 2, carries out coal gasification reaction as catalyst again.
The device that methane is produced using above-mentioned coal catalytic hydrogenation, can make coal be converted into the methane of high-purity, improve methane
Production rate effectively reduces the process costs that coal catalytic hydrogenation produces methane, meanwhile, the environment-protective circulating for realizing steel slag utilizes,
Improve the economy and the feature of environmental protection of steel slag.
Exemplary, one section of gasification furnace 1 includes furnace body, the coal feed inlet being provided on the furnace body, steel slag feed inlet
With vapor feed inlet, wherein vapor feed inlet is arranged in the bottom of furnace body；The steel slag feed inlet is arranged in the coal
Because the density of coal is less than the density of steel slag the lower section of steel slag feed inlet is arranged in, sufficiently in coal feed inlet by the top of feed inlet
It ensures coal and the mixing of steel slag and reacts, if being arranged steel slag feed inlet below coal feed inlet, after steel slag enters the furnace body,
Since its density is larger, can be fallen along furnace body with faster speed, cause the coal of top whereabouts cannot sufficiently and steel slag in this way
Contact, and then coal gasification reaction is influenced, and steel slag can not be fully utilized.
Exemplary, one section of gasification furnace 1 is bubbling fluidized bed；Two sections of gasification furnaces 2 are fast fluidized bed.One section of gasification furnace
For bubbling fluidized bed, because coal particle is larger, and reaction rate is slower, and fluidizing velocity matches reaction speed.Two sections of gasification furnaces are fast
Fast fluidized bed, because pulverized coal particle is thinner, and under the catalytic action of iron simple substance or low price ferriferous oxide, coal hydrogenation reaction rate compared with
Fastly.Meanwhile two sections are set as fast fluidized bed and can take reaction solid material from furnace roof out of, are delivered to iron oxidation regeneration furnace
In.
Ferriferous oxide is sufficient when in order to guarantee coal gasification reaction, and the coal catalytic hydrogenation produces the device of methane further include:
Steel slag device 5 is mended, the benefit steel slag device 5 is connected to one section of gasification furnace 1, by the benefit steel slag device 5 to one section of gas
Change furnace 1 and supplement steel slag, so that ferriferous oxide content is sufficient in coal gasification course.
Methane is produced using the method and apparatus that coal catalytic hydrogenation described above produces methane, using steel slag as producing methane
Catalyst, and recycle the ferriferous oxide in steel slag, during recycling, will not pollute the environment,
The selection and recycling that can effectively solve the problems, such as catalyst in coal catalytic hydrogenation process, also add the additional utility value of steel slag.
In the description of this specification, particular features, structures, materials, or characteristics can be real in any one or more
Applying can be combined in any suitable manner in example or example.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (11)
1. a kind of method that coal catalytic hydrogenation produces methane characterized by comprising
Coal gasification: being mixed into promoting the circulation of qi for steel slag, coal and vapor, synthesis gas and iron is made, wherein the slag bag iron content
Oxide；
Methane is produced: by coal dust, the synthesis gas obtained and the iron mix carry out catalytic hydrogenation gasification, be made methane and
Semicoke containing iron；
Iron oxidation: carrying out gas solid separation for the methane obtained, the semicoke containing iron, separating obtained described to contain iron
Semicoke aoxidized again, ferriferous oxide is made, and the ferriferous oxide is imported in the coal gasification.
2. the method that coal catalytic hydrogenation according to claim 1 produces methane, which is characterized in that in the coal gasification course
In: gasification temperature is 700~800 DEG C, and vapor pressure is 2.5~4.0MPa.
3. the method that coal catalytic hydrogenation according to claim 1 produces methane, which is characterized in that in the coal gasification course
In: the partial size of the coal is less than or equal to 5mm, and the partial size of the steel slag is less than or equal to 0.4mm.
4. the method that coal catalytic hydrogenation according to claim 1 produces methane, which is characterized in that in the coal gasification course
In: the mass ratio of the steel slag, the vapor and the coal is 0.5~2: 1~3: 1.
5. the method that coal catalytic hydrogenation according to claim 1 produces methane, which is characterized in that produced in the methane
Cheng Zhong: catalytic hydrogenation gasification temperature is 750~850 DEG C, and catalytic hydrogenation vapor pressure is 2.5~4.0MPa.
6. the method that coal catalytic hydrogenation according to claim 1 produces methane, which is characterized in that produced in the methane
Cheng Zhong: the partial size of the coal dust is less than or equal to 0.4mm.
7. the method that coal catalytic hydrogenation according to claim 1 produces methane, which is characterized in that produced in the methane
Cheng Zhong: the mass ratio of the iron and the coal dust is 0.04~0.1: 1.
8. the method that coal catalytic hydrogenation according to claim 1 produces methane, which is characterized in that in the iron oxidation process
In: oxidizing temperature is 850~900 DEG C, and oxidative pressure is 2.5~4.0MPa.
9. producing the device of methane, feature using the method that any coal catalytic hydrogenation of claim 1~8 produces methane
It is, the device for producing methane includes:
One section of gasification furnace；
The feed inlet of two sections of gasification furnaces, two sections of gasification furnaces is connected to the discharge port of one section of gasification furnace；
Gas-solid separator, the feed inlet of the gas-solid separator are connected to the discharge port of two sections of gasification furnaces；
Oxidation regeneration furnace, the feed inlet of the oxidation regeneration furnace are connected to the solid phase discharge port of the gas-solid separator, the oxygen
The discharge port for changing regenerating furnace is connected to the feed inlet of one section of gasification furnace.
10. the device according to claim 9 for producing methane, which is characterized in that one section of gasification furnace is fed with coal
Mouth and steel slag feed inlet, wherein the position of the steel slag feed inlet is located at the top of the coal feed inlet.
11. the device according to claim 9 for producing methane, which is characterized in that one section of gasification furnace is bubbling fluidization
Bed, two sections of gasification furnaces are fast fluidized bed.
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| CN201811183789.3A CN109181783B (en) | 2018-10-11 | 2018-10-11 | Method and device for preparing methane by catalytic hydrogenation of coal |
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| CN201811183789.3A CN109181783B (en) | 2018-10-11 | 2018-10-11 | Method and device for preparing methane by catalytic hydrogenation of coal |
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