CN206266512U - The system for processing low-order coal - Google Patents
The system for processing low-order coal Download PDFInfo
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- CN206266512U CN206266512U CN201621213329.7U CN201621213329U CN206266512U CN 206266512 U CN206266512 U CN 206266512U CN 201621213329 U CN201621213329 U CN 201621213329U CN 206266512 U CN206266512 U CN 206266512U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The utility model proposes the system for the treatment of low-order coal, wherein, the system for processing low-order coal includes：Screening plant, lump coal hot blast combined type sorting unit, fine coal hot-air flow sorting unit, block cleaned coal breaker, fine coal drying device, powder coal gasification furnace and gasification gas waste-heat recovery device, wherein, lump coal hot blast combined type sorting unit and fine coal hot-air flow sorting unit are connected with screening plant respectively；Block cleaned coal breaker is connected with lump coal hot blast combined type sorting unit；Fine coal drying device is connected with the fine coal outlet of block cleaned coal breaker and screening plant respectively；Powder coal gasification furnace is connected with fine coal drying device；Gasification gas waste-heat recovery device is connected with powder coal gasification furnace, and gasification gas waste-heat recovery device is connected with fine coal drying device, and dried tail gas waste heat retracting device is connected with lump coal hot blast combined type sorting unit, fine coal hot-air flow sorting unit respectively.Be classified for lump coal, sort by the system of above-mentioned treatment low-order coal, drying and dehydrating and bed pulverized coal gasification technology are coupled, and reduces system energy consumption and operating cost, reduces environmental pollution.
Description
Technical field
The utility model belongs to chemical field, in particular to a kind of system for processing low-order coal.
Background technology
Low-order coal is primarily referred to as the coal that cohesiveness is poor, degree of coalification is low, common are lignite, peat, jet coal, weathered coal
Deng.China's low-order coal aboundresources, accounts for coal total amount has been verified by China more than 55%.
The main Land use systems of low-order coal are direct combustion power generations at this stage, although this Land use systems are operationally simple
It is easy, but cause the significant wastage of the energy, equipment etc..In addition, the thermal efficiency that low-order coal is directly burnt is low, and low-order coal is fired
SOx, CO and NOx etc. can be produced severe contamination is caused to air after burning.Low-order coal upgrading processing will be as low-order coal Efficient Development
The key for utilizing.The upgrading processing of low-order coal includes sorting, dry, shaping, pyrolysis, gasification etc., hot after low-order coal deliming, dehydration
Value increases, and the corrosion of equipment can be reduced during following process after low order coal desulfurization and harm of the acid rain to environment is reduced, low
Rank coal is processed by upgrading can expand its utilization scope.
Although can remove the dirt in low-order coal by sorting, coal fully connects with water during wet split
Touch, cause coal selecting product moisture to increase, reduce product caloric value, partial offset coal washing effect, the mesh being also dehydrated with upgrading
Mark is contradicted, and the surface moisture of coal causes that the sticking probability between particle is big during the dry separation of normal temperature, discharge refuse effect
Difference.Individually dry and gasification technology improves the calorific value of low-order coal to a certain extent, but the mineral such as ash, sulphur in upgraded coal are miscellaneous
Matter influences the quality of following process product, and the compound such as sulfur-bearing, nitrogen pollutes environment and equipment corrosion.Therefore, by dry
The method of the grey desulfurization of method sorting drop, drying and dehydrating and gasification upgrading will improve lignite calorific value and conversion ratio, while reducing energy consumption
With a kind of effective way of environmental pollution, Social benefit and economic benefit is improved, meet China's energy of developing clean coal technology many
The strategic demand of unitization, the active response new policy of national energy-saving emission reduction.
Utility model content
The utility model is intended at least solve to a certain extent one of technical problem in correlation technique.Therefore, this reality
It is to propose a kind of system for processing low-order coal with a new purpose, successively carries out low order raw coal by using the system
The treatment such as classification, sorting, dry, gasification, can significantly improve the treating capacity and gasification gas quality of gasification furnace.
According to one side of the present utility model, the utility model proposes a kind of system for processing low-order coal.According to this
The embodiment of utility model, the system includes：Screening plant, the screening plant has low-order coal entrance, lump coal outlet and powder
Coal export；There is lump coal hot blast combined type sorting unit, the lump coal hot blast combined type sorting unit lump coal entrance, block cleaned coal to go out
Mouth, the first hot-wind inlet and the first offgas outlet, the lump coal entrance are connected with lump coal outlet；Fine coal hot-air flow is sorted
Device, the fine coal hot-air flow sorting unit has fine coal entrance, the outlet of the first powder cleaned coal, the second hot-wind inlet and the second tail
Gas is exported, and the fine coal entrance is connected with fine coal outlet；Block cleaned coal breaker, the block cleaned coal breaker has block
Cleaned coal entrance and the second powder cleaned coal are exported, and the block cleaned coal entrance is connected with block cleaned coal outlet；Fine coal drying device, it is described
Fine coal drying device has powder cleaned coal entrance, the outlet of xeraphium cleaned coal, the 3rd hot-wind inlet and the 3rd offgas outlet, the powder essence
Coal entrance is connected with the first powder cleaned coal outlet and the second powder cleaned coal outlet respectively；Powder coal gasification furnace, the fine coal gas
Changing stove has feeding mouth, the outlet of gasification gas and slag-drip opening, and the feeding mouth is connected with xeraphium cleaned coal outlet；More than gasification gas
Heat reclamation device, the gasification gas waste-heat recovery device has gasification gas entrance, cooling gasification gas outlet and heat outlet, described
Gasification gas entrance is connected with the gasification gas outlet, and the heat outlet is connected with the 3rd hot-wind inlet；And, dry tail
Gas waste-heat recovery device, the dried tail gas waste heat retracting device has the first gas inlet and hot-blast outlet, first tail
Gas entrance is connected with the 3rd offgas outlet, the hot-blast outlet respectively with first hot-wind inlet and second hot blast
Entrance is connected.
Thus, the system of the treatment low-order coal according to the utility model embodiment will be classified, sort and bed pulverized coal gasification technology
Coupling, the waste heat of gasification gas is reclaimed as dried medium using gasification gas waste-heat recovery device, is reclaimed using dried tail gas waste heat
Device reclaims the waste heat for drying tail gas as separating medium, reduces system energy consumption and operating cost, reduces environmental pollution, together
When, improve the effective rate of utilization of low-order coal and the conversion ratio of low-order coal.Raw coal carries out gasification again after dehydration drop ash treatment can drop
Dirt content in the energy consumption and product of low gasification.Specifically, the system medium sized coal hot blast combined type sorting unit
Low-order coal is sorted using hot blast with fine coal hot-air flow sorting unit, it is possible to increase lump coal, the efficiency of separation of fine coal and
Dehydration rate；Crushed through block cleaned coal breaker again after the sorted treatment of lump coal, comminution energy conssumption can be reduced；Lump coal is through broken
Afterwards, the contact area with dried medium can be significantly increased, and then improves drying efficiency；After the sorted discharge refuse of low-order coal, reduce
The specific energy consumption and gasification gas impurity of gasification.
In addition, the system of the treatment low-order coal according to the utility model above-described embodiment can also have following additional skill
Art feature：
In some embodiments of the present utility model, the system of the treatment low-order coal is further included：Dust arrester, institute
Dust arrester is stated with the second gas inlet, dust outlet and gas vent, second gas inlet is respectively with described first
Offgas outlet is connected with second offgas outlet.
According to other side of the present utility model, the utility model proposes a kind of method for processing low-order coal.According to
Embodiment of the present utility model, the method is carried out using the system for the treatment of low-order coal described above.It is new according to this practicality
The specific embodiment of type, the method includes：
(1) supplying the low-order coal carries out screening process into the screening plant, to respectively obtain lump coal and powder
Coal；
(2) lump coal is supplied into the lump coal hot blast combined type sorting unit, and using hot blast to the lump coal
Sorting process is carried out, to obtain block cleaned coal and the first tail gas；
(3) fine coal is supplied into the fine coal hot-air flow sorting unit, and the fine coal is entered using hot blast
Promoting the circulation of qi classification treatment, to obtain the first powder cleaned coal and the second tail gas；
(4) supply the block cleaned coal carries out break process into the block cleaned coal breaker, to obtain the second powder
Cleaned coal；
(5) the first powder cleaned coal and the second powder cleaned coal are supplied into the fine coal drying device, and using heat
Wind is dried treatment, to obtain xeraphium cleaned coal and the 3rd tail gas；
(6) the xeraphium cleaned coal is supplied into the powder coal gasification furnace and is gasified, to obtain the gas that gasifies；
(7) supply the gasification gas carries out the gas waste heat recovery processing that gasifies into the gasification gas waste-heat recovery device,
To produce hot gas, and the hot gas return to step (5) is used as the hot blast.
(7) by it is described dry tail gas supply into the dried tail gas waste heat retracting device be dried waste heat from tail gas reclaim
Treatment, to produce hot blast, and hot blast difference return to step (2) and step (3) is used as the hot blast.
Thus, the method for the treatment low-order coal according to the utility model embodiment will be classified, sort and bed pulverized coal gasification technology
Coupling, the waste heat of gasification gas is reclaimed as dried medium using gasification gas waste-heat recovery device, is reclaimed using dried tail gas waste heat
Device reclaims the waste heat for drying tail gas as separating medium, reduces system energy consumption and operating cost, reduces environmental pollution, together
When, improve the effective rate of utilization of low-order coal and the conversion ratio of low-order coal.Raw coal carries out gasification again after dehydration drop ash treatment can drop
Dirt content in the energy consumption and product of low gasification.Specifically, the system medium sized coal hot blast combined type sorting unit
Low-order coal is sorted using hot blast with fine coal hot-air flow sorting unit, it is possible to increase lump coal, the efficiency of separation of fine coal and
Dehydration rate；Crushed through block cleaned coal breaker again after the sorted treatment of lump coal, comminution energy conssumption can be reduced；Lump coal is through broken
Afterwards, the contact area with dried medium can be significantly increased, and then improves drying efficiency；After the sorted discharge refuse of low-order coal, reduce
The specific energy consumption and gasification gas impurity of gasification.
In addition, the method for the treatment low-order coal according to the utility model above-described embodiment can also have following additional skill
Art feature：
In some embodiments of the present utility model, the method for the treatment low-order coal is further included：(8) by step
(2) the second tail gas produced in the first tail gas, the step (3) that are produced in supplies and dust removal process is carried out into the dust arrester.
In some embodiments of the present utility model, the granularity of the lump coal is to be not less than 6 millimeters, the granularity of the fine coal
Less than 6 millimeters.
In some embodiments of the present utility model, the granularity of the xeraphium cleaned coal is less than 6 millimeters.
In some embodiments of the present utility model, in step (2), use gas flow temperature for 100-130 degrees Celsius and
Ascending air speed carries out the combined type dry separation treatment for the hot blast of 9-24m/s；
In step (3), gas flow temperature is used to enter with the hot blast that ascending air speed is 4-9m/s for 100-130 degrees Celsius
The row pneumatic separation treatment.
In some embodiments of the present utility model, in step (5), it is 100-200 degrees Celsius and air-flow to use temperature
Speed 0.1-0.5m/s hot blasts carry out the dried process.
In some embodiments of the present utility model, the moisture content of the xeraphium cleaned coal is less than 10 weight %.
In some embodiments of the present utility model, in step (6), the temperature of the gasification is that 800-1100 is Celsius
Degree.
Brief description of the drawings
Fig. 1 is the structural representation of the system of the treatment low-order coal according to the utility model one embodiment.
Fig. 2 is the structural representation of the system of the treatment low-order coal according to the utility model another embodiment.
Fig. 3 is the flow chart of the method for the treatment low-order coal according to the utility model one embodiment.
Fig. 4 is the flow chart of the method for the treatment low-order coal according to the utility model another embodiment.
Specific embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein ad initio
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 Description of Drawings is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model
Limitation.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward ", " suitable
The orientation or position relationship of the instruction such as hour hands ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " are based on orientation shown in the drawings
Or position relationship, be for only for ease of description the utility model and simplify and describe, rather than indicate or imply signified device or
Element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to limit of the present utility model
System.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In description of the present utility model, " multiple " is meant that two or two
More than, unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integrally；Can be
Mechanically connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of element internal or two interaction relationships of element.For the ordinary skill in the art, can basis
Concrete condition understands concrete meaning of the above-mentioned term in the utility model.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score
Can be the first and second feature directly contacts, or the first and second features are by intermediary mediate contact.And, first is special
Levy second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only
Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with
Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second feature.
In one side of the present utility model, the utility model proposes a kind of system for processing low-order coal.According to this reality
With new embodiment, the system includes：
There is screening plant, the screening plant low-order coal entrance, lump coal outlet and fine coal to export；
Lump coal hot blast combined type sorting unit, the lump coal hot blast combined type sorting unit has lump coal entrance, block cleaned coal
Outlet, the first hot-wind inlet and the first offgas outlet, the lump coal entrance are connected with lump coal outlet；
Fine coal hot-air flow sorting unit, the fine coal hot-air flow sorting unit has fine coal entrance, the first powder cleaned coal
Outlet, the second hot-wind inlet and the second offgas outlet, the fine coal entrance are connected with fine coal outlet；
There is block cleaned coal breaker, the block cleaned coal breaker block cleaned coal entrance and the second powder cleaned coal to export, described
Block cleaned coal entrance is connected with block cleaned coal outlet；
There is fine coal drying device, the fine coal drying device powder cleaned coal entrance, the outlet of xeraphium cleaned coal, the 3rd hot blast to enter
Mouth and the 3rd offgas outlet, the powder cleaned coal entrance export phase with the first powder cleaned coal outlet and the second powder cleaned coal respectively
Even；
Powder coal gasification furnace, the powder coal gasification furnace has feeding mouth, the outlet of gasification gas and slag-drip opening, the feeding mouth and institute
The outlet of xeraphium cleaned coal is stated to be connected；
There is gasification gas waste-heat recovery device, the gasification gas waste-heat recovery device gasification gas entrance, cooling gasification gas to go out
Mouth and heat outlet, the gasification gas entrance are connected with the gasification gas outlet, and the heat outlet enters with the 3rd hot blast
Mouth is connected；And
There is dried tail gas waste heat retracting device, the dried tail gas waste heat retracting device the first gas inlet and hot blast to go out
Mouthful, first gas inlet is connected with the 3rd offgas outlet, the hot-blast outlet respectively with first hot-wind inlet
It is connected with second hot-wind inlet.
Thus, the system of the treatment low-order coal according to the utility model embodiment will be classified, sort and bed pulverized coal gasification technology
Coupling, the waste heat of gasification gas is reclaimed as dried medium using gasification gas waste-heat recovery device, is reclaimed using dried tail gas waste heat
Device reclaims the waste heat for drying tail gas as separating medium, reduces system energy consumption and operating cost, reduces environmental pollution, together
When, improve the effective rate of utilization of low-order coal and the conversion ratio of low-order coal.Raw coal carries out gasification again after dehydration drop ash treatment can drop
Dirt content in the energy consumption and product of low gasification.Specifically, the system medium sized coal hot blast combined type sorting unit
Low-order coal is sorted using hot blast with fine coal hot-air flow sorting unit, it is possible to increase lump coal, the efficiency of separation of fine coal and
Dehydration rate；Crushed through block cleaned coal breaker again after the sorted treatment of lump coal, comminution energy conssumption can be reduced；Lump coal is through broken
Afterwards, the contact area with dried medium can be significantly increased, and then improves drying efficiency；After the sorted discharge refuse of low-order coal, reduce
The specific energy consumption and gasification gas impurity of gasification.
The system of the treatment low-order coal of the utility model embodiment is described in detail below with reference to Fig. 1.According to this reality
With new embodiment, the system includes：Screening plant 100, lump coal hot blast combined type sorting unit 200, fine coal hot-air flow
Sorting unit 300, block cleaned coal breaker 400, fine coal are dried and fill 500, powder coal gasification furnace 600, gasification gas waste-heat recovery device
700 and dried tail gas waste heat retracting device 800.
According to specific embodiment of the utility model, there is screening plant 100 low-order coal entrance 101, lump coal to export 102 and
Fine coal outlet 103.Thus, screening process can be carried out to low-order coal using screening plant 100, and respectively obtains lump coal and powder
Coal.
According to specific embodiment of the utility model, the pulverized coal particle size that above-mentioned screening is obtained not higher than 6mm, it is possible thereby to directly
Connect to supply the fine coal of the granularity to powder coal gasification furnace 600 and carry out gasification process, and by the lump coal of greater particle size through follow-up broken
Gasified again after broken, such that it is able to avoid the waste of gasification medium sized coal, and then raw material availability can be improved.
According to specific embodiment of the utility model, lump coal hot blast combined type sorting unit 200 have lump coal entrance 201,
Block cleaned coal exports the 202, first hot-wind inlet 203 and the first offgas outlet 204, and the lump coal entrance 201 is exported with the lump coal
102 are connected.Thus, can sieve the lump coal for obtaining to screening plant 100 using lump coal hot blast combined type sorting unit 200 is carried out
Sorting process, specifically can carry out sorting process to lump coal, and obtain block cleaned coal and the first tail gas using hot blast.By adopting
The efficiency of separation can be further improved with lump coal hot blast combined type sorting unit, and then for follow-up gasification provides quality raw materials.Separately
Outward, the outer water of spoil in raw coal and part can be removed by sorting, the block cleaned coal hardness obtained after sorting is reduced, and then can be with
Save the comminution energy conssumption to block cleaned coal.
According to specific embodiment of the utility model, fine coal hot-air flow sorting unit 300 has fine coal entrance 301, the
One powder cleaned coal exports the 302, second hot-wind inlet 303 and the second offgas outlet 304, and the fine coal entrance 301 goes out with the fine coal
Mouth 103 is connected.Specifically sorting process can be carried out to fine coal using hot blast, obtain powder cleaned coal, powder is used as by using hot blast
The medium of coal gas classification can further improve the efficiency of separation, and then for follow-up gasification provides quality raw materials.It is possible thereby to remove
The spoil and part moisture gone in fine coal, and then specific energy consumption and gas impurity in follow-up gasification can be reduced, improve gas
Change gas product quality.
According to specific embodiment of the utility model, the block cleaned coal breaker 400 has block cleaned coal entrance 401 and the
Two powder cleaned coal outlet 402, the block cleaned coal entrance 401 is connected with block cleaned coal outlet 202.Thus, it is possible to by lump coal hot blast
The block cleaned coal that the sorting of combined type sorting unit 200 is obtained supplies and break process is carried out into block cleaned coal breaker 400, so as to
To powder cleaned coal.Thus, it is possible to further would prove unsuitable for the lump coal breaking of gasification into fine coal, and then significantly improve and can further carry
The effective rate of utilization of low-order and high-order coal and the conversion ratio of low-order coal, and then improve gasification gas yield.
According to specific embodiment of the utility model, the granularity of the broken fine coal for obtaining is less than 6 millimeters.And then be more suitable for
Follow-up gasification process, can further improve the effective rate of utilization of low-order coal and the conversion ratio of low-order coal, and then improve gasification
Gas yield.
According to specific embodiment of the utility model, the fine coal drying device 500 has powder cleaned coal entrance 501, dries
Powder cleaned coal exports the 502, the 3rd hot-wind inlet 503 and the 3rd offgas outlet 504, and the powder cleaned coal entrance 501 is respectively with described the
One powder cleaned coal outlet 302 is connected with the second powder cleaned coal outlet 402.Thus, it is possible to by fine coal hot-air flow sorting unit 300
The powder cleaned coal that the powder cleaned coal and the break process of block cleaned coal breaker 400 that sorting is obtained are obtained is supplied to fine coal drying device 500
In, and treatment is dried using hot blast, to obtain xeraphium cleaned coal and the 3rd tail gas.
10 weights are less than from there through the moisture content of the xeraphium cleaned coal being dried to obtain using above-mentioned fine coal drying device 500
Amount %.And then treatment was dried before gasification process is carried out to low-order coal, gasification gas yield can be significantly improved.
According to specific embodiment of the utility model, the powder coal gasification furnace 600 has feeding mouth 601 and gasification gas outlet
602, the feeding mouth 601 is connected with xeraphium cleaned coal outlet 502.Thus, it is possible to fine coal drying device 600 is dry
To xeraphium cleaned coal supply into the powder coal gasification furnace 600 and gasified, to obtain the gas that gasifies.Thus, above-mentioned fine coal
Gasification furnace 600 is suitable to for the powder cleaned coal of the fine coal obtained by above-mentioned screening and broken gained to carry out gasification process, such that it is able to
To gasification gas.Inventor is had found, is coupled by just lump coal separation, drying and dehydrating and bed pulverized coal gasification technology, can further carried
The effective rate of utilization of low-order and high-order coal and the conversion ratio of low-order coal, and then improve gasification gas yield.
According to specific embodiment of the utility model, the temperature gasified in powder coal gasification furnace 600 is not limited especially
System, those skilled in the art can be selected according to actual needs, according to specific embodiment of the utility model, the temperature of gasification
Degree can be 800-1100 degrees Celsius.
According to specific embodiment of the utility model, the gasification gas waste-heat recovery device 700 has gasification gas entrance
701st, cooling gasification gas exports 702 and heat outlet 703, and the gasification gas entrance 701 is connected with gasification gas outlet 602,
The heat outlet 703 is connected with the 3rd hot-wind inlet 503.Thus, it is possible to the gasification that will be produced in powder coal gasification furnace 600
Gas is supplied carries out the gas waste heat recovery processing that gasifies into the gasification gas waste-heat recovery device 700, to produce hot gas, and by institute
State during hot gas returns to fine coal drying device 500 and used as hot blast.
According to specific embodiment of the utility model, gasification gas waste-heat recovery device 700 can be reclaimed gasification gas waste heat
The hot gas of generation is utilized, and hot air temperature is controlled at 100-200 degrees Celsius, and fine coal drying device is returned after voltage stabilizing bag voltage stabilizing
As dried medium in 500.It is possible thereby to further save energy consumption.
According to specific embodiment of the utility model, there is the dried tail gas waste heat retracting device 800 first tail gas to enter
Mouth 801 and hot-blast outlet 802, first gas inlet 801 are connected with the 3rd offgas outlet 504, the hot-blast outlet
802 are connected with the first hot-wind inlet 203, second hot-wind inlet 303 respectively.Thus, it is possible to by fine coal drying device 500
Produce dry tail gas supply into the dried tail gas waste heat retracting device 800 be dried waste heat from tail gas recycling, with
Just hot blast is produced, and the hot blast is returned into lump coal hot blast combined type sorting unit 200, fine coal hot-air flow sorting unit respectively
Used as hot blast in 300.
According to specific embodiment of the utility model, dried tail gas waste heat retracting device 800 can be reclaimed and dry tail gas
Remaining thermogenetic hot blast is utilized, and hot blast temperature is controlled at 100-130 degrees Celsius, and lump coal hot blast is returned after voltage stabilizing bag voltage stabilizing
As separating medium in combined type sorting unit 200 and fine coal hot-air flow sorting unit 300.
With reference to Fig. 2, according to specific embodiment of the utility model, the system of above-mentioned treatment low-order coal is further included：Remove
Dirt device 900,
According to specific embodiment of the utility model, dust arrester 900, there is the dust arrester 900 second tail gas to enter
Mouthfuls 901, dust outlet 902 and gas vent 903, second gas inlet 901 respectively with the first offgas outlet 204, second
Offgas outlet 304 is connected.It is possible thereby to reduce environmental pollution.
According to other side of the present utility model, the utility model proposes a kind of method for processing low-order coal.According to
Embodiment of the present utility model, the method is carried out using the system for the treatment of low-order coal described above.It is new according to this practicality
The specific embodiment of type, the method includes：
(1) supplying the low-order coal carries out screening process into the screening plant, to respectively obtain lump coal and powder
Coal；
(2) lump coal is supplied into the lump coal hot blast combined type sorting unit, and using hot blast to the lump coal
Sorting process is carried out, to obtain block cleaned coal and the first tail gas；
(3) fine coal is supplied into the fine coal hot-air flow sorting unit, and the fine coal is entered using hot blast
Promoting the circulation of qi classification treatment, to obtain the first powder cleaned coal and the second tail gas；
(4) supply the block cleaned coal carries out break process into the block cleaned coal breaker, to obtain the second powder
Cleaned coal；
(5) the first powder cleaned coal and the second powder cleaned coal are supplied into the fine coal drying device, and using heat
Wind is dried treatment, to obtain xeraphium cleaned coal and the 3rd tail gas；
(6) the xeraphium cleaned coal is supplied into the powder coal gasification furnace and is gasified, to obtain the gas that gasifies；
(7) supply the gasification gas carries out the gas waste heat recovery processing that gasifies into the gasification gas waste-heat recovery device,
To produce hot gas, and the hot gas return to step (5) is used as the hot blast.
(7) by it is described dry tail gas supply into the dried tail gas waste heat retracting device be dried waste heat from tail gas reclaim
Treatment, to produce hot blast, and hot blast difference return to step (2) and step (3) is used as the hot blast.
Thus, the method for the treatment low-order coal according to the utility model embodiment will be classified, sort and bed pulverized coal gasification technology
Coupling, the waste heat of gasification gas is reclaimed as dried medium using gasification gas waste-heat recovery device, is reclaimed using dried tail gas waste heat
Device reclaims the waste heat for drying tail gas as separating medium, reduces system energy consumption and operating cost, reduces environmental pollution, together
When, improve the effective rate of utilization of low-order coal and the conversion ratio of low-order coal.Raw coal carries out gasification again after dehydration drop ash treatment can drop
Dirt content in the energy consumption and product of low gasification.Specifically, the system medium sized coal hot blast combined type sorting unit
Low-order coal is sorted using hot blast with fine coal hot-air flow sorting unit, it is possible to increase lump coal, the efficiency of separation of fine coal and
Dehydration rate；Crushed through block cleaned coal breaker again after the sorted treatment of lump coal, comminution energy conssumption can be reduced；Lump coal is through broken
Afterwards, the contact area with dried medium can be significantly increased, and then improves drying efficiency；After the sorted discharge refuse of low-order coal, reduce
The specific energy consumption and gasification gas impurity of gasification.
The method of the treatment low-order coal of the utility model embodiment is described in detail below with reference to Fig. 3.According to this reality
With new embodiment, the method includes：
S100：Low-order coal is supplied into screening plant carries out screening process
According to specific embodiment of the utility model, low-order coal is supplied carries out screening process into the screening plant,
To respectively obtain lump coal and fine coal.The granularity of the lump coal that above-mentioned screening is obtained is not less than 6 millimeters, and the granularity of fine coal is less than 6 millis
Rice.It is possible thereby to directly the fine coal of the granularity is supplied to carrying out gasification process in powder coal gasification furnace 600, and by greater particle size
Lump coal is gasified again after follow-up crushing, and such that it is able to avoid the waste of gasification medium sized coal, and then can improve raw material
Utilization rate.
S200：Lump coal is supplied carries out sorting process into lump coal hot blast combined type sorting unit using hot blast
According to specific embodiment of the utility model, lump coal is supplied into the lump coal hot blast combined type sorting unit,
And sorting process is carried out to lump coal using hot blast, to obtain block cleaned coal and the first tail gas.Thus, answered by using lump coal hot blast
Box-like sorting unit can further improve the efficiency of separation and lump coal purity, and then for follow-up gasification provides quality raw materials.In addition,
The outer water of spoil and part in raw coal, the block cleaned coal hardness reduction obtained after sorting can be removed by sorting, and then can be saved
Save the comminution energy conssumption to block cleaned coal.
According to one embodiment of the present utility model, the temperature of the hot blast used in lump coal hot blast combined type sorting unit is simultaneously
It is not particularly limited, those skilled in the art can be selected according to actual needs, according to specific implementation of the present utility model
Example, the temperature of hot blast can be 100-130 degrees Celsius.
According to further embodiment of the present utility model, the flow velocity of the hot blast used in lump coal hot blast combined type sorting unit
It is not particularly restricted, those skilled in the art can be selected according to actual needs, according to specific reality of the present utility model
Example is applied, the flow velocity of hot blast can be 9-24m/s.Inventor is had found, can effectively be sorted using the hot blast of the flow rates de-
Except the spoil in lump coal, and the moisture on low-order coal surface can be taken away, reduce during discharge refuse between particle (especially essence
Between coal and spoil) bonding probability, so as to improve sorting discharge refuse efficiency while improve follow-up gasification product quality and
Yield.
S300：Fine coal is supplied carries out pneumatic separation treatment into fine coal hot-air flow sorting unit using hot blast
According to specific embodiment of the utility model, fine coal is supplied into fine coal hot-air flow sorting unit, and used
Hot blast carries out pneumatic separation treatment to fine coal, to obtain the first powder cleaned coal and the second tail gas.It is possible thereby in removing fine coal
Spoil and part moisture, and then specific energy consumption and gas impurity in follow-up gasification can be reduced, improve gasification gas product matter
Amount.
According to one embodiment of the present utility model, the temperature of the hot blast used in fine coal hot-air flow sorting unit is not
It is particularly limited, those skilled in the art can be selected according to actual needs, according to specific embodiment of the utility model,
The temperature of hot blast can be 100-130 degrees Celsius.
According to further embodiment of the present utility model, the flow velocity of the hot blast used in fine coal hot-air flow sorting unit is simultaneously
It is not particularly limited, those skilled in the art can be selected according to actual needs, according to specific implementation of the present utility model
Example, the flow velocity of hot blast can be 4-9m/s.Inventor's discovery, removing powder can be effectively sorted using the hot blast of the flow rates
Spoil in coal, and the moisture on low-order coal surface can be taken away, reduce during discharge refuse between particle (especially cleaned coal with
Between spoil) bonding probability, so as to improve the quality and yield of follow-up gasification product while sorting discharge refuse efficiency is improved.
S400：Block cleaned coal is supplied carries out break process into the block cleaned coal breaker
According to specific embodiment of the utility model, the block cleaned coal is supplied into the block cleaned coal breaker to be carried out
Break process, to obtain the second powder cleaned coal.Thus, it is possible to further would prove unsuitable for the lump coal breaking of gasification into fine coal, and then
The conversion ratio of the effective rate of utilization and low-order coal that can further improve low-order coal is significantly improved, and then improves gasification gas yield.
According to specific embodiment of the utility model, the granularity of the broken fine coal for obtaining is less than 6 millimeters.And then be more suitable for
Follow-up gasification process, can further improve the effective rate of utilization of low-order coal and the conversion ratio of low-order coal, so as to further drop
Low cost of material, improves gasification gas yield.
S500：First powder cleaned coal and the second powder cleaned coal are supplied into the fine coal drying device and is dried using hot blast
Treatment
According to specific embodiment of the utility model, the first powder cleaned coal and the second powder cleaned coal are supplied to fine coal drying device
In, and treatment is dried using hot blast, to obtain xeraphium cleaned coal and the 3rd tail gas.
According to specific embodiment of the utility model, it can be 100-200 degrees Celsius that dried process uses the temperature of hot blast,
It is possible thereby to further improve drying efficiency.According to specific embodiment of the utility model, above-mentioned dried process is using hot blast
Air velocity can be 0.1-0.5m/s.It is possible thereby to further improve drying efficiency.
According to specific embodiment of the utility model, the moisture content of the xeraphium cleaned coal obtained by above-mentioned dried process is low
In 10 weight %.It is possible thereby to further improve gasification efficiency.Inventor has found, by being dried reduction gasification to powder cleaned coal
The moisture of coal, reduces the dehydration energy of gasification, so as to improve the quality of gasification gas, improves gasification gas yield.
S600：Xeraphium cleaned coal is supplied and is gasified into powder coal gasification furnace
According to specific embodiment of the utility model, xeraphium cleaned coal is supplied and is gasified into powder coal gasification furnace, with
Just the gas that gasifies is obtained.Granularity according to supply of the present utility model to the xeraphium cleaned coal in powder coal gasification furnace is less than 6 millimeters.By
This can significantly reduce gasification energy consumption, improve gasification efficiency.
According to specific embodiment of the utility model, the temperature gasified in gasification furnace is not particularly restricted, specifically
It can be 800-1100 degrees Celsius.It is possible thereby to further improve gasification efficiency.
S700：Gasification gas is supplied carries out the gas waste heat recovery processing that gasifies into gasification gas waste-heat recovery device
According to specific embodiment of the utility model, gasification gas is supplied into the gasification gas waste-heat recovery device to be carried out
Gasification gas waste heat recovery processing, to produce hot gas, and hot gas return to step S500 is used as hot blast.
According to specific embodiment of the utility model, gasification gas waste-heat recovery device can be reclaimed gasification gas waste heat and produced
Hot gas utilized, hot air temperature control at 100-200 degrees Celsius, after voltage stabilizing bag voltage stabilizing return fine coal drying device in make
It is dried medium.It is possible thereby to further save energy consumption.
S800：To dry tail gas supply into dried tail gas waste heat retracting device be dried waste heat from tail gas recycling
According to specific embodiment of the utility model, tail gas will be dried and supplied into the dried tail gas waste heat retracting device
Waste heat from tail gas recycling is dried, to produce hot blast, and hot blast return to step S200, step S300 as heat is distinguished into
Wind is used.
According to specific embodiment of the utility model, dried tail gas waste heat retracting device can be reclaimed dried tail gas waste heat
The hot blast of generation is utilized, and hot blast temperature is controlled at 100-130 degrees Celsius, lump coal hot blast is returned after voltage stabilizing bag voltage stabilizing and is combined
As separating medium in formula sorting unit and fine coal hot-air flow sorting unit.
With reference to Fig. 4, the method for the treatment low-order coal according to the utility model embodiment is further included：
S900：The tail gas produced in step S200, S300 is supplied into dust arrester carries out dust removal process
By to fine coal hot-air flow sorting unit in step S200 medium sized coal hot blast combined types sorting unit, step S300
The tail gas of discharge carries out dust removal process in dust arrester in 300, it is possible thereby to reduce environmental pollution.
The system and method for the treatment low-order coal of the utility model above-described embodiment at least have one of following effect：
(1) system and method for the treatment low-order coal of the utility model embodiment by low order coal grading, sorting, drying,
Gasification technology is integrated, reduces the energy consumption of gasification, meanwhile, the waste heat that ingenious utilization coal gasification is produced, using gasification gas
Waste-heat recovery device reclaims the waste heat of gasification gas as dried medium, is reclaimed using dried tail gas waste heat retracting device and dries tail gas
Waste heat as separating medium, reduce system energy consumption and operating cost, reduce environmental pollution, meanwhile, improve having for low-order coal
Effect utilization rate and low-order coal transformation efficiency.
(2) system and method for the treatment low-order coal of the utility model embodiment realize predrying and sorting integration,
The dirts such as the spoil in coal are removed by dry separation, after low-order coal hot blast sorting removing surface moisture, sorting is reduced
During between particle (especially between cleaned coal and spoil) bonding probability, low-order coal combined type was sorted under solving normal temperature
Cause the problem of discharge refuse effect difference in journey due to the adhesion between particle.
(3) system and method for the treatment low-order coal of the utility model embodiment carry out classification treatment by raw coal, right
Lump coal and fine coal are sorted respectively, and the particle size range of sorting narrows, sharpness of separation improve, spoil discharge rate improve, dry and
The treating capacity of gasification is big, improves calorific value of gas, reduces ash, sulphur impurity content.
(4) system and method for the treatment low-order coal of the utility model embodiment are carried out at wholegrain level discharge refuse by raw coal
Reason, the calorific value of coal gas is low when solving low-order coal directly as gasified raw material, ash content is high, the low problem of heat utilization efficiency.
Embodiment
As shown in figure 1, processing low-order coal.
Specific steps include：
1), raw coal sends into screening plant 100 by run coal bin by belt and feeder first.Granularity is+6mm after classification
Oversize feeds lump coal hot blast combined type sorting unit 200 and is sorted by belt, controls 106 DEG C of hot blast temperature, rises gas
Flow velocity degree 15.89m/s, sorting cleaned coal is crushed to below -6mm in block cleaned coal breaker 400, obtains powder cleaned coal；Through dividing
Granularity is sorted for -6mm screenings feeds fine coal air-classifier 300 by belt after level, controls hot blast temperature 104
DEG C, ascending air speed 7.25m/s obtains powder cleaned coal.The hot blast of outer confession has just been started with as the separating medium of raw coal.
2) the two batches powder cleaned coal that will be obtained in above-mentioned steps feeds fine coal drying device 500 and is dried place by belt
Reason, at 185 DEG C, the moisture that air velocity 0.23m/s dries fine coal is 7.34% to hot blast temperature；The overheat of outer confession is just started with
Steam as fine coal dried medium.
3) in the xeraphium cleaned coal being dried to obtain in fine coal drying device 500 being fed into powder coal gasification furnace 600, pass through
900 DEG C of gasifications, gasifying agent is oxygen/steam, and pressure 0.10MPa, gasification gas enters the recovery waste heat of waste heat boiler 700, produces heat
Gas.
4) by waste heat boiler 700 reclaim gasification gas more than thermogenetic hot gas utilized, hot air temperature control in 100-200
Degree Celsius, returned in fine coal drying device 500 as dried medium after voltage stabilizing bag voltage stabilizing.
5) hot blast that dried tail gas waste heat retracting device 800 reclaims dried tail gas waste heat generation is utilized, hot blast temperature
Degree control returns to lump coal hot blast combined type sorting unit 200 and fine coal hot blast gas at 100-130 degrees Celsius after voltage stabilizing bag voltage stabilizing
As separating medium in flow point screening device 300.
6) tail gas produced in lump coal hot blast combined type sorting unit 200, fine coal air-classifier 300 is supplied to dedusting
Dust removal process is carried out in device 800.
The moisture of pending low-order coal, ash content, sulphur content, calorific value analysis result as shown in table 1, dried fine coal is gas
The moisture of the fine coal before change, ash content, sulphur content, calorific value analysis result it is as shown in table 2.
300,000 tons/year can be reached using the method low-order coal treating capacity of the present embodiment, treatment particle size range is wholegrain degree
Level, the full water of low-order coal is 28.72wt%.
Table 1：The analysis result of pending raw coal property
| Moisture (wt%) | Ash content (wt%) | Sulphur content (wt%) |
| 30.72 | 22.06 | 1.18 |
Table 2：The analysis result of coal property before gasification
| Moisture (wt%) | Ash content (wt%) | Sulphur content (wt%) |
| 7.34 | 14.12 | 0.69 |
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 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
Stating need not be directed to identical embodiment or example.And, the specific features of description, structure, material or feature can be
Combined in an appropriate manner in any one or more embodiments or example.Additionally, in the case of not conflicting, this area
Technical staff can be carried out the feature of the different embodiments or example described in this specification and different embodiments or example
With reference to and combination.
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 (2)
1. it is a kind of process low-order coal system, it is characterised in that including：
There is screening plant, the screening plant low-order coal entrance, lump coal outlet and fine coal to export；
Lump coal hot blast combined type sorting unit, the lump coal hot blast combined type sorting unit have lump coal entrance, block cleaned coal outlet,
First hot-wind inlet and the first offgas outlet, the lump coal entrance are connected with lump coal outlet；
Fine coal hot-air flow sorting unit, the fine coal hot-air flow sorting unit have fine coal entrance, the first powder cleaned coal outlet,
Second hot-wind inlet and the second offgas outlet, the fine coal entrance are connected with fine coal outlet；
There is block cleaned coal breaker, the block cleaned coal breaker block cleaned coal entrance and the second powder cleaned coal to export, described piece of essence
Coal entrance is connected with block cleaned coal outlet；
Fine coal drying device, the fine coal drying device have powder cleaned coal entrance, xeraphium cleaned coal outlet, the 3rd hot-wind inlet and
3rd offgas outlet, the powder cleaned coal entrance is connected with the first powder cleaned coal outlet and the second powder cleaned coal outlet respectively；
Powder coal gasification furnace, the powder coal gasification furnace has feeding mouth, the outlet of gasification gas and slag-drip opening, and the feeding mouth is dry with described
Dry powder cleaned coal outlet is connected；
Gasification gas waste-heat recovery device, the gasification gas waste-heat recovery device have gasification gas entrance, cooling gasification gas outlet and
Heat outlet, the gasification gas entrance is connected with the gasification gas outlet, the heat outlet and the 3rd hot-wind inlet phase
Even；And
Dried tail gas waste heat retracting device, the dried tail gas waste heat retracting device has the first gas inlet and hot-blast outlet,
First gas inlet is connected with the 3rd offgas outlet, the hot-blast outlet respectively with first hot-wind inlet and institute
The second hot-wind inlet is stated to be connected.
2. it is according to claim 1 treatment low-order coal system, it is characterised in that further include：
Dust arrester, the dust arrester has the second gas inlet, dust outlet and gas vent, second gas inlet
It is connected with first offgas outlet and second offgas outlet respectively.
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| CN201621213329.7U CN206266512U (en) | 2016-11-10 | 2016-11-10 | The system for processing low-order coal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115247083A (en) * | 2022-08-22 | 2022-10-28 | 安徽科达洁能股份有限公司 | Graded gasification system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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