CN108865199A - A kind of method and its application of lignite modifying process - Google Patents
A kind of method and its application of lignite modifying process Download PDFInfo
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- CN108865199A CN108865199A CN201810756164.5A CN201810756164A CN108865199A CN 108865199 A CN108865199 A CN 108865199A CN 201810756164 A CN201810756164 A CN 201810756164A CN 108865199 A CN108865199 A CN 108865199A
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- thermosol
- lignite
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- modifying process
- coke
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
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- Engineering & Computer Science (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Coke Industry (AREA)
Abstract
The present invention provides a kind of method and its application of lignite modifying process, and the modifying process for belonging to low-order coal utilizes technical field.This method be by lignite under suitable condition, thermosol extracting is carried out in the reaction kettle of clearance-type intensified by ultrasonic wave using organic solvent, obtains the lignite thermosol object of high yield after being centrifuged, and is applied to coke making and coal blending.It cannot be used for after the lignite of coke making and coal blending handled by the extracting of this thermosol, obtained high yield thermosol object is stripped of most ash content and inert component in lignite, and is provided with very high cohesiveness and coking behavior.By the use of the thermosol object in coke making and coal blending, coke quality can be significantly improved, reduces coke ash, or under the premise of guaranteeing coke quality, it can be suitably incorporated other mill coal such as ub-bituminous coal, to reduce coal-blending coking cost, stablize and expand coking coal source.
Description
Technical field
The invention belongs to the modifying process of low-order coal to utilize technical field, and in particular to the modifying process of lignite and its refine
Application in burnt coal blending.
Background technique
Lignite is only used for gasification, liquefaction or refining semi-coke, since its degree of metamorphism is low, high oxygen content, without cohering
Property, thus cannot be used for coal-blending coking.Technology related to the present invention is mainly the thermosol extraction technique and coal-blending coking skill of coal
Art, but be different from the present invention.
Japan has carried out the hot extraction technique research of a large amount of coal, and target is to obtain to be practically free of the ashless of ash content in high yield
Coal, the ashless coal can be injected directly into gas turbine combustion power generation, or realize catalysis low temperature gasification, to realize that the cleaning of coal is high
Effect utilizes.The light cycle oil such as Yoshida, 1- methyl naphthalene, four kinds of solvents of 2- methyl naphthalene and thick methylnaphthalene oil are respectively to three kinds of cigarettes
Coal all reaches 50% in 360 DEG C of progress Continuous Heat extracting discoveries, the hot extract content of several coals, and gained ashless coal content of ashes is mostly
<0.2%, can be injected directly into gas turbine combustion power generation (Fuel Processing Technology, 2004,86:61-
72.).Sharma etc. may be implemented in 700 DEG C of low temperature gasifications, herein the study found that through the overheat pumping obtained ashless coal of body
Under the conditions of catalyst can recycle (Fuel, 2008,87 (4-5):91-97).The heat extracting of coal, it is domestic there was only us at present
It has been reported that, such as water perseverance good fortune (Fuel, 2013,108:385-90) heat for having carried out different solvents to ub-bituminous coal extracts, methyl naphthalene
Oil has very high extract content to refreshing mansion ub-bituminous coal, reaches 65% or more；1- methyl naphthalene adds methanol or 2 pyrrolidones of N- methyl
The extract content to shenfu coal can be significantly improved.Further study show that when shenfu coal ub-bituminous coal thermosol object hydrogenation liquefaction, liquid
Change activity and liquefaction oil yield be high, catalyst can recycle four times and non-inactivation (Fuel, 2014,115：227–231).
It can be seen that reported in the literature mainly carry out thermosol extracting using different solvents to bituminous coal and ub-bituminous coal, it is acquired
Thermosol object can be injected directly into gas turbine combustion power generation, or efficiently liquefied, or progress low temperature gasification, and by lignite this
The minimum coal of one degree of metamorphism uses thermosol extraction technique, obtains thermosol object and is used for coal-blending coking, part substitutes coking coal, together
Shi Gaishan coke quality, correlative study have not been reported yet.
Summary of the invention
For the specific feature of lignite, i.e. degree of metamorphism is low, and oxygen content is high, and more than 30%, nothing is cohered and coking behavior, no
The shortcomings that capable of being used for coke making and coal blending, is desirably to obtain in high yield, hardly the invention proposes a kind of method of lignite modifying process
Lignite thermosol object containing ash content, and coke making and coal blending can be used for.
In order to solve the above technical problems, the present invention is to be achieved by the following technical programs.
A kind of modifying process method of lignite is to carry out thermosol extracting to lignite using organic solvent, auxiliary in ultrasonic wave
Strengthen, then carries out hot or cold conditions and be separated by filtration to obtain thermosol object, which can be used for coke making and coal blending；The thermosol extracting
Temperature is 300~380 DEG C, and extraction times 0.5~2 hour, the organic solvent additional amount was 2~10 times of lignite quality；Institute
State the mixture that organic solvent is thick methylnaphthalene oil or 1- methyl naphthalene or 1- methyl naphthalene and methanol or ethyl alcohol.
Further, the thermosol extraction temperature is 360 DEG C, and the extraction times are 1h, and the organic solvent is 1- first
The mixture of base naphthalene and methanol.
Further, the mass ratio of 1- methyl naphthalene and methanol is 5 in the organic solvent:1.
Further, the thermosol extracting carries out in the autoclave assisted and strengthened with ultrasonic wave.
The thermosol object obtained after above-mentioned lignite modifying process can use in coke making and coal blending.
Further, 1/3 coking coal of the lignite thermosol object 5wt% (mass percent) substitution corresponding amount is matched in coking
It is used in coal, coke quality can be significantly improved, increase amount of allocating, effect is more preferable.
Difficult point of the invention is that lignite degree of metamorphism is low, high oxygen content, without cohesiveness, it is impossible to be used in coal-blending coking,
In time a small amount of lignite supplying (<1%) being greatly reduced for coke quality, can also be caused.By handling skill using thermosol to lignite
Art selects organic solvent appropriate that lignite is separated into thermosol object and hot insoluble matter.Thermosol object but has very high cohesiveness
Can, coking coal such as 1/3 coking coal or rich coal can be substituted with coal-blending coking part, and can be improved coke quality, thus this technology and
Existing the relevant technologies are significantly different, have substantive distinguishing features outstanding.
Compared with prior art, the present invention has the following technical effects：
1, after using the technology of the present invention, after thermosol extracting appropriate processing, available high yield is practically free of ash
The lignite thermosol object divided (yield is greater than 50%).
2, the former lignite of opposite no adhesion, thermosol object has preferable cohesiveness, suitable with 1/3 coking coal, coheres finger
Number G value reaches 60 or more, and also more former lignite reduces by 95% or more to ash content.
3, the lignite thermosol object 5% after modifying process of the present invention substitutes (earthenware after 1/3 coking coal in basic coal blending
Crucible is burnt) gained coke compared with original basis matches gained coke, can significantly improve coke quality, and can reduce coke making and coal blending
Cost.
4, coking coal reserves in China's is insufficient, and especially good rich coal and coking coal are even more critical shortage.With China's coking
The contradiction of the continuous development of industry, coking coal resource shortage becomes increasingly conspicuous, and therefore, further expansion does not cohere the mill coal such as coal
Application in process of coking guarantees and improves coke quality, is one of the Main way of China's coking industry development.The present invention
Show the technology extracted to mill coal-lignite using the thermosol of different organic solvents, obtained thermosol object low ash, and has
Preferable cohesiveness and coking behavior, completely can be in the application in coke making and coal blending, so as to expand coking coal source.It is involved
The current coking enterprise for the treatment of conditions can be implemented.Reach 5.2 hundred million t according to the usage amount of China's coking coal in 2017, if pressed
Amount of allocating according to lignite thermosol object is 5% meter, then 25,000,000 t of coking coal can be saved, to can both reduce coke making and coal blending
Cost, and coking coal resource can be made full use of, economic and social benefit is fairly obvious, it is contemplated that, the present invention promotes and applies
It has good prospects.
Specific embodiment
The present invention is described in detail below with reference to embodiment, but the present invention is not limited to following embodiments.
Embodiment 1
Test is aided with intensified by ultrasonic wave in clearance-type reaction kettle under conditions of 360 DEG C to lignite and carries out thermosol extracting
Processing 1 hour, solvent use 1- methyl naphthalene, and additional amount is 10 times of coal sample quality, and thermosol is cooling by reaction kettle after extracting
To room temperature, reaction product is centrifuged, and acquired solution obtains thermosol object after solvent recovery.The heat obtained with this condition
Molten object yield reaches 40%, and thermosol object caking index G value reaches 80, ash content removing 97% in raw coal.It is replaced using the thermosol object 5%
Coke obtained by (crucible coke) matches gained coke phase with original basis after 1/3 coking coal of the equivalent in generation basic coal blending
Than micro strength improves 3.7%, CO2Reactive CRI reduces by 11.2%, and post reaction strength CRS improves 5.4%.
Embodiment 2
Test is aided with intensified by ultrasonic wave in clearance-type reaction kettle under conditions of 360 DEG C to lignite and carries out thermosol extracting
Processing 1 hour, solvent use thick methylnaphthalene oil, and additional amount is 10 times of coal sample quality, and thermosol is cold by reaction kettle after extracting
But to room temperature, reaction product is centrifuged, and acquired solution obtains thermosol object after solvent recovery.It obtains with this condition
Thermosol object yield reaches 56%, and thermosol object caking index G value reaches 89, ash content removing 97% in raw coal.Using the thermosol object 5%
Coke obtained by (crucible coke) and original basis match gained coke phase after 1/3 coking coal of the equivalent in the basic coal blending of substitution
Than micro strength improves 7.7%, CO2Reactive CRI reduces by 16.2%, and post reaction strength CRS improves 8.2%.
Embodiment 3
Test is aided with intensified by ultrasonic wave in clearance-type reaction kettle under conditions of 360 DEG C to lignite and carries out thermosol extracting
Processing 1 hour, solvent use 1- methyl naphthalene and methanol quality ratio for 4:1 mixed solution, additional amount are 10 times of coal sample quality,
Reaction kettle is cooled to room temperature by thermosol after extracting, and reaction product is centrifuged, and acquired solution obtains after solvent recovery
To thermosol object.The thermosol object yield obtained with this condition reaches 72%, and thermosol object caking index G value reaches 93, ash in raw coal
Divide removing 96%.It is substituted using the thermosol object 5% after 1/3 coking coal of the equivalent in basic coal blending obtained by (crucible coke)
For coke compared with original basis matches gained coke, micro strength improves 3.9%, CO2Reactive CRI reduces by 12.1%, after reaction
Intensity CRS improves 6.9%.
Embodiment 4
Test is aided with intensified by ultrasonic wave in clearance-type reaction kettle under conditions of 320 DEG C to lignite and carries out thermosol extracting
Processing 1 hour, solvent use 1- methyl naphthalene, and additional amount is 10 times of coal sample quality, and thermosol is cooling by reaction kettle after extracting
To room temperature, reaction product is centrifuged, and acquired solution obtains thermosol object after solvent recovery.The heat obtained with this condition
Molten object yield reaches 30%, and thermosol object caking index G value reaches 65, ash content removing 97% in raw coal.It is replaced using the thermosol object 5%
Coke obtained by (crucible coke) matches gained coke phase with original basis after 1/3 coking coal of the equivalent in generation basic coal blending
Than micro strength improves 7.0%, CO2Reactive CRI reduces by 14.4%, and post reaction strength CRS improves 7.9%.
Embodiment 5
Test is aided with intensified by ultrasonic wave in clearance-type reaction kettle under conditions of 320 DEG C to lignite and carries out thermosol extracting
Processing 1 hour, solvent use thick methylnaphthalene oil, and additional amount is 10 times of coal sample quality, and thermosol is cold by reaction kettle after extracting
But to room temperature, reaction product is centrifuged, and acquired solution obtains thermosol object after solvent recovery.It obtains with this condition
Thermosol object yield reaches 42%, and thermosol object caking index G value reaches 76, ash content removing 97% in raw coal.Using the thermosol object 5%
Coke obtained by (crucible coke) and original basis match gained coke phase after 1/3 coking coal of the equivalent in the basic coal blending of substitution
Than micro strength improves 9.3%, CO2Reactive CRI reduces by 17.4%, and post reaction strength CRS improves 9.3%.
Embodiment 6
Test is aided with intensified by ultrasonic wave in clearance-type reaction kettle under conditions of 320 DEG C to lignite and carries out thermosol extracting
Processing 1 hour, solvent use 1- methyl naphthalene and methanol quality ratio for 4:1 mixed solution, additional amount are 10 times of coal sample quality,
Reaction kettle is cooled to room temperature by thermosol after extracting, and reaction product is centrifuged, and acquired solution obtains after solvent recovery
To thermosol object.The thermosol object yield obtained with this condition reaches 61%, and thermosol object caking index G value reaches 82, ash in raw coal
Divide removing 97%.It is substituted using the thermosol object 5% after 1/3 coking coal of the equivalent in basic coal blending obtained by (crucible coke)
For coke compared with original basis matches gained coke, micro strength improves 5.1%, CO2Reactive CRI reduces by 13.4%, after reaction
Intensity CRS improves 7.1%.
320~360 DEG C for the treatment of temperature are extracted in thermosol it can be seen from the thermosol extracting processing of embodiment lignite, through several
The thermosol extract content of kind different organic solvents, thermosol object yield reach 30-70%, and ash content reduces by 96% or more in thermosol object, stick
Knot index G value reaches 65 or more.The thermosol object 5% substitutes (crucible after 1/3 coking coal of the equivalent in basic coal blending
It is burnt) for gained coke compared with original basis matches gained coke, micro strength improves 3.7-9.3%, CO2Reactive CRI is reduced
11.2-17.4%, post reaction strength CRS improve 5.4-9.3%.
Claims (7)
1. a kind of method of lignite modifying process, which is characterized in that lignite is extracted using organic solvent thermosol, it is rear carry out cold conditions from
The isolated thermosol object of the heart；
The thermosol extraction temperature is 300~380 DEG C, and thermosol extraction times 0.5~2 hour, the organic solvent additional amount was
2~10 times of lignite quality；
The organic solvent is the mixture of thick methylnaphthalene oil or 1- methyl naphthalene or 1- methyl naphthalene and methanol or ethyl alcohol.
2. the method for lignite modifying process as described in claim 1, which is characterized in that the thermosol extraction temperature is 360 DEG C,
The extraction times are 1h, and the organic solvent is the mixture of 1- methyl naphthalene and methanol.
3. the method for lignite modifying process as claimed in claim 2, which is characterized in that in the organic solvent:1- methyl naphthalene
Mass ratio with methanol is 4:1.
4. the method for lignite modifying process as described in claim 1, which is characterized in that the thermosol extracting is auxiliary in band ultrasonic wave
It helps in the clearance-type reaction kettle of reinforcing and carries out.
5. application of the thermosol object that the lignite modifying process method as described in Claims 1-4 is any obtains in coke making and coal blending.
6. application of the thermosol object that lignite modifying process method as claimed in claim 5 obtains in coke making and coal blending, feature exist
In, by the thermosol object obtained after the lignite modifying process substitute 1/3 coking coal used in coke making and coal blending.
7. application of the thermosol object that lignite modifying process method as claimed in claim 6 obtains in coke making and coal blending, feature exist
In, by the thermosol object 5wt% obtained after the lignite modifying process substitution equivalent 1/3 coking coal used in coke making and coal blending.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115141665A (en) * | 2021-03-29 | 2022-10-04 | 上海梅山钢铁股份有限公司 | Coke for matching Australian gas coal and coking method |
| CN115141665B (en) * | 2021-03-29 | 2024-06-04 | 上海梅山钢铁股份有限公司 | Coke matched with Australian gas coal and coking method |
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| JP2007204629A (en) * | 2006-02-02 | 2007-08-16 | Kansai Coke & Chem Co Ltd | Formulation method for coke production raw material |
| CN103194250A (en) * | 2013-04-28 | 2013-07-10 | 安徽工业大学 | High-sulfur fertilizer coal modification method and application thereof in coking coal blending |
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2018
- 2018-07-11 CN CN201810756164.5A patent/CN108865199A/en active Pending
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115141665A (en) * | 2021-03-29 | 2022-10-04 | 上海梅山钢铁股份有限公司 | Coke for matching Australian gas coal and coking method |
| CN115141665B (en) * | 2021-03-29 | 2024-06-04 | 上海梅山钢铁股份有限公司 | Coke matched with Australian gas coal and coking method |
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Application publication date: 20181123 |