CN206266513U - The system for processing low-order coal - Google Patents
The system for processing low-order coal Download PDFInfo
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- CN206266513U CN206266513U CN201621216702.4U CN201621216702U CN206266513U CN 206266513 U CN206266513 U CN 206266513U CN 201621216702 U CN201621216702 U CN 201621216702U CN 206266513 U CN206266513 U CN 206266513U
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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
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Abstract
The utility model proposes the system for the treatment of low-order coal, including：Low-order coal breaker, screening plant, lump coal hot blast dense medium separation device, fine coal hot-air flow sorting unit, block cleaned coal breaker, fine coal drying device, powder coal gasification furnace, gasification gas waste-heat recovery device and dried tail gas waste heat retracting device, wherein, screening plant is connected with low-order coal breaker, and lump coal hot blast dense medium separation device 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 dense medium separation device；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 dense medium separation device and fine coal hot-air flow sorting unit respectively.Be classified for lump coal by the system, sorting 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.The features such as having high-moisture, low heat value, oxidizable, easy argillization due to low-order coal, causes it to exist at wet split black water
The shortcomings of managing oxidizable costly, long term storage and cost of transportation of unit energy high.
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.
Coal separation technology can remove the inorganic sulfur of 50-60% in raw coal as the basis of clean coal technology and source
It is one of most ripe, most economical, industrialization degree highest technology in clean coal technology with major part ash.Although by sorting
The dirt in low-order coal can be removed, but coal is fully contacted with water during wet split, causes coal selecting product moisture to increase
Greatly, product caloric value is reduced, partial offset coal washing effect, the target being also dehydrated with upgrading contradicts, and the dry method of normal temperature
The surface moisture of coal causes that the sticking probability between particle is big in assorting room, and discharge refuse effect is poor.Therefore, selected process system is not
Together, separating effect there is also difference.
Individually dry and gasification technology improves the calorific value of low-order coal to a certain extent, but ash, sulphur in upgraded coal etc.
Dirt influences the quality of following process product, and the compound such as sulfur-bearing, nitrogen pollutes environment and equipment corrosion.With coal
Charcoal exploits the increasing of dynamics, and the reserves of high-quality coal resource are reduced year by year.Therefore, the Processes For Effective Conversion of low order coal resource is developed
With violate the law, will have great importance to the sustainable development of coal industry.
The method for dropping grey desulfurization, drying and dehydrating and gasification upgrading by dry separation will improve lignite calorific value and conversion
Rate, while reducing energy consumption and a kind of effective way of environmental pollution, improve Social benefit and economic benefit, meets China's development clean
The strategic demand of clean coal technology energy diversification, 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.
According to one side of the present utility model, the utility model proposes a kind of system for processing low-order coal, including：
Low-order coal breaker, the low-order coal breaker has low-order coal entrance and broken coal export,
There is screening plant, the screening plant break up coal entrance, lump coal outlet and fine coal to export, the break up coal entrance
It is connected with the broken coal export；
Lump coal hot blast dense medium separation device, the lump coal hot blast dense medium separation device has lump coal entrance, block cleaned coal
Outlet, the first hot-wind inlet, solid dense media entrance and the first offgas outlet, the lump coal entrance export phase with the lump coal
Even；
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 and gasification gas outlet, the feeding mouth and the drying
The outlet of powder cleaned coal is 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.
Low-order coal is crushed, is classified, is sorted, done by the system of the treatment low-order coal of the utility model above-described embodiment
The treatment such as dry, gasification, can effectively remove dirt and the moisture such as sulphur, ash in low-order coal, improve gasification furnace treating capacity and coal
Gas quality.Coupled using by classification and sorting and bed pulverized coal gasification technology, by the block/fine coal classification and sorting of raw coal can improve lump coal,
The efficiency of separation and dehydration rate of fine coal；Lump coal carries out crushing energy reduction comminution energy conssumption again after being processed through dense medium separation；Lump coal is passed through
Fine coal increases with the contact area of dried medium after broken, and drying efficiency is improved；After the sorted discharge refuse of raw coal, reduce and gasified
The specific energy consumption and gas impurity of journey；The waste heat of gasification gas is reclaimed as dried medium using gasification gas waste-heat recovery device, is adopted
The waste heat for drying tail gas is reclaimed as separating medium with dried tail gas waste heat retracting device, is reduced system energy consumption and is run into
This, reduces environmental pollution, meanwhile, improve the effective rate of utilization of low-order coal.
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 above-mentioned treatment low-order coal is further included：
Dust arrester, the dust arrester has the second gas inlet, dust outlet and gas vent, second tail gas
Entrance is connected with first offgas outlet and the second offgas outlet respectively.
According to another aspect of the present utility model, foregoing treatment low-order coal is used the utility model proposes one kind
System process low-order coal method, including：
(1) supplying the low-order coal carries out break process into low-order coal breaker, to obtain break up coal；
(2) supplying the break up coal carries out screening process into the screening plant, to respectively obtain lump coal and powder
Coal；
(3) lump coal is supplied into the lump coal hot blast dense medium separation device, and uses hot blast and solid dense medium
The lump coal of verifying carries out dense medium separation treatment, to obtain block cleaned coal and the first tail gas；
(4) 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；
(5) supply the block cleaned coal carries out break process into the block cleaned coal breaker, to obtain the second powder
Cleaned coal；
(6) 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；
(7) the xeraphium cleaned coal is supplied into the powder coal gasification furnace and is gasified, to obtain the gas that gasifies；
(8) 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 by the hot gas, return to step (6) is used as the hot blast.
(9) 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 the hot blast, return to step (3) and step (4) is used as the hot blast.
Low-order coal is crushed, is classified, is sorted, done by the method for the treatment low-order coal of the utility model above-described embodiment
The treatment such as dry, gasification, can effectively remove dirt and the moisture such as sulphur, ash in low-order coal, improve gasification furnace treating capacity and coal
Gas quality.Coupled using by classification and sorting and bed pulverized coal gasification technology, can be improved by the thermal current block/fine coal classification and sorting of raw coal
The efficiency of separation and dehydration rate of lump coal, fine coal；Lump coal carries out crushing energy reduction comminution energy conssumption again after being processed through dense medium separation；Block
Fine coal increases coal with the contact area of dried medium after crushing, and drying efficiency is improved；After the sorted discharge refuse of raw coal, gas is reduced
The specific energy consumption and gas impurity of change process；The waste heat of gasification gas is reclaimed as sorting using gasification gas waste-heat recovery device and is done
Dry medium, reduces system energy consumption and operating cost, reduces environmental pollution, meanwhile, improve the effective rate of utilization of low-order coal.
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 above-mentioned treatment low-order coal is further included：
(10) the second tail gas produced in the first tail gas produced in step (3), step (4) is supplied to dedusting dress
Dust removal process is carried out in putting.
In some embodiments of the present utility model, the granularity of the break up coal is less than 80 millimeters.
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, the moisture content of the xeraphium cleaned coal is less than 10 weight %.
In some embodiments of the present utility model, in step (3), the hot air flow that the dense medium separation treatment is used
Temperature is 100-120 DEG C, and dense media fluidizing velocity is 0.9-1.8m/s, separating density 1.4-2.0g/cm3。
In some embodiments of the present utility model, in step (4), it is 100-130 degrees Celsius and air-flow to use temperature
Speed carries out the pneumatic separation treatment for the hot blast of 4-9m/s.
In some embodiments of the present utility model, in step (6), 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, in step (7), 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：
Low-order coal breaker, the low-order coal breaker has low-order coal entrance and broken coal export,
There is screening plant, the screening plant break up coal entrance, lump coal outlet and fine coal to export, the break up coal entrance
It is connected with the broken coal export；
Lump coal hot blast dense medium separation device, the lump coal hot blast dense medium separation device has lump coal entrance, block cleaned coal
Outlet, the first hot-wind inlet, solid dense media entrance and the first offgas outlet, the lump coal entrance export phase with the lump coal
Even；
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 and gasification gas outlet, the feeding mouth and the drying
The outlet of powder cleaned coal is 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.
Low-order coal is crushed, is classified, is sorted, done by the system of the treatment low-order coal of the utility model above-described embodiment
The treatment such as dry, gasification, can effectively remove dirt and the moisture such as sulphur, ash in low-order coal, improve gasification furnace treating capacity and coal
Gas quality.Coupled using by classification and sorting and bed pulverized coal gasification technology, by the block/fine coal classification and sorting of raw coal can improve lump coal,
The efficiency of separation and dehydration rate of fine coal；Lump coal carries out crushing energy reduction comminution energy conssumption again after being processed through dense medium separation；Lump coal is passed through
Fine coal increases with the contact area of dried medium after broken, and drying efficiency is improved；After the sorted discharge refuse of raw coal, reduce and gasified
The specific energy consumption and gas impurity of journey；The waste heat of gasification gas is reclaimed as dried medium using gasification gas waste-heat recovery device, is adopted
The waste heat for drying tail gas is reclaimed as separating medium with dried tail gas waste heat retracting device, is reduced system energy consumption and is run into
This, reduces environmental pollution, meanwhile, improve the effective rate of utilization of low-order coal.
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：Low-order coal breaker 100, screening plant 200, lump coal hot blast dense medium separation dress
Put 300, fine coal hot-air flow sorting unit 400, block cleaned coal breaker 500, fine coal dry fill 600, powder coal gasification furnace 700,
Gasification gas waste-heat recovery device 800 and dried tail gas waste heat retracting device 900.
According to specific embodiment of the utility model, low-order coal breaker 100 has low-order coal entrance 101 and break up coal
Outlet 102.Thus low-order coal is tentatively crushed in advance, and then spoil can be improved in order to subsequently be sorted to lump coal
Separating effect.According to specific example of the present utility model, the granularity of the break up coal obtained after broken through low-order coal breaker 100
Less than 80 millimeters.
According to specific embodiment of the utility model, the granularity of the above-mentioned broken break up coal for obtaining is less than 80mm, then should
Break up coal is supplied to screening plant 200 and carries out screening process, it is possible thereby to reduce the upper size boundary of lump coal separation, reduces lump coal point
The particle size range of choosing, can reduce the influence of lump coal separation course grain and improve lump coal separation precision, such that it is able to improve gas
The effective treating capacity of change process medium sized coal, and then gasification gas quality can also be improved.
According to specific embodiment of the utility model, there is screening plant 200 break up coal entrance 201, lump coal to export 202 and
Fine coal outlet 203, break up coal entrance 201 is connected with broken coal export 102.Thus, after can be to crushing using screening plant 200
Low-order coal carry out screening process, and respectively obtain lump coal and fine 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 700 and carry out gasification process, and the lump coal warp of greater particle size is follow-up again
It is secondary to crush laggard promoting the circulation of qi, 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 dense medium separation device 300 have lump coal entrance 301,
Block cleaned coal export the 302, first hot-wind inlet 303, solid dense media entrance 304, the first offgas outlet 305, lump coal entrance 301 with
Lump coal outlet 202 is connected.
Thus, can sieve the lump coal for obtaining to screening plant 200 using lump coal hot blast dense medium separation device 300 is carried out
Dense medium separation treatment, specifically can carry out dense medium separation treatment to lump coal, and obtain using hot blast and solid-state dense media
To block cleaned coal and the first tail gas.Dividing for lump coal is improve by using lump coal dense medium separation, the density bed that dense media is formed
Precision is selected, the most of spoil in lump coal can be removed, reduce lump coal breaking and fine coal energy consumption for drying, improve coal gasification
Treating capacity.In addition, by using lump coal dense media predrying, the heat transfer between dense media and low-order coal enhances lump coal
Drying and dehydrating rate, reduces dehydration energy.In addition, the outer water of spoil and part in raw coal can be removed by sorting, after sorting
The block cleaned coal hardness reduction for obtaining, and then the comminution energy conssumption to block cleaned coal can be saved.
According to specific embodiment of the utility model, fine coal hot-air flow sorting unit 400 has fine coal entrance 401, the
One powder cleaned coal exports the 402, second hot-wind inlet 403 and the second offgas outlet 404, and fine coal entrance 401 exports 203 phases with fine coal
Even.It is possible thereby to the spoil in removing fine coal, and then specific energy consumption and gas impurity in follow-up gasification can be reduced, improve
Gasification gas product quality.Sorted by using fine coal hot-air flow, reduce the sticking probability between pulverized coal particle, can removed
Most of spoil in fine coal, improves fine coal sharpness of separation, improves coal gasification treating capacity, improves gasification gas quality.
In addition, it is predrying by using the sorting of fine coal hot-air flow to be carried out to fine coal, reduce drying and dehydrating energy consumption.
According to specific embodiment of the utility model, block cleaned coal breaker 500 has the powder of block cleaned coal entrance 501 and second
Cleaned coal outlet 502, block cleaned coal entrance 501 is connected with block cleaned coal outlet 302.Thus, it is possible to lump coal hot blast dense medium separation is filled
Putting the block cleaned coal that 300 sortings obtain and supplying carries out break process into block cleaned coal breaker 500, to obtain powder cleaned coal.By
This, can further would prove unsuitable for the lump coal breaking of gasification into fine coal, and then significantly improve and can further improve low-order coal
The conversion ratio of effective rate of utilization and 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, fine coal drying device 600 has powder cleaned coal entrance 601, xeraphium essence
Coal export 602, the 3rd hot-wind inlet 603 and the 3rd offgas outlet 604, powder cleaned coal entrance 601 are exported with the first powder cleaned coal respectively
402 are connected with the second powder cleaned coal outlet 502.
Thus, it is possible to fine coal hot-air flow sorting unit 400 to be sorted the powder cleaned coal and block cleaned coal breaker 500 for obtaining
The powder cleaned coal that break process is obtained is supplied into fine coal drying device 600, and is dried treatment using hot blast, to be done
Dry powder cleaned coal and the 3rd tail gas.
According to specific embodiment of the utility model, by the drying being dried to obtain using above-mentioned fine coal drying device 600
The moisture content of powder cleaned coal is less than 10 weight %.And then treatment, Ke Yixian were dried before gasification process is carried out to low-order coal
Write and improve gasification gas yield.
According to specific embodiment of the utility model, powder coal gasification furnace 700 has feeding mouth 701 and gasification gas outlet 702,
Feeding mouth 701 is connected with xeraphium cleaned coal outlet 602.Thus, it is possible to the xeraphium essence that fine coal drying device 600 is dried to obtain
Coal is supplied into powder coal gasification furnace 700 and gasified, to obtain the gas that gasifies.Thus, be suitable to will be upper for above-mentioned powder coal gasification furnace 700
The powder cleaned coal for stating the fine coal obtained by screening and broken gained carries out gasification process, such that it is able to obtain the gas that gasifies.Invention human hair
It is existing, coupled by just lump coal separation, drying and dehydrating and bed pulverized coal gasification technology, can further improve effective utilization of low-order coal
The conversion ratio of rate and 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 700 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, gasification gas waste-heat recovery device 800 has gasification gas entrance 801, cold
But gasification gas exports 802 and heat outlet 803, and gasification gas entrance 801 exports 702 and is connected with gasification gas, heat outlet 803 and the
Three hot-wind inlets 603 are connected.Thus, it is possible to the gasification gas produced in powder coal gasification furnace 700 is supplied to gasification gas waste heat recovery
The gas waste heat recovery processing that gasifies is carried out in device 800, to produce hot gas, and will be made in hot gas return fine coal drying device 600
For hot blast is used.
According to specific embodiment of the utility model, the waste heat using the 800 pairs of gasification gas of gas waste-heat recovery device that gasify enters
Row is reclaimed, and produces hot gas.And utilized the hot gas of generation, hot stream temperature is controlled at 100-200 DEG C, through voltage stabilizing bag voltage stabilizing
The dried medium for filling 600 is dried as fine coal afterwards.
According to specific embodiment of the utility model, dried tail gas waste heat retracting device 900 have dry gas inlet 901
With hot-blast outlet 902, dry gas inlet 901 and be connected with the 3rd offgas outlet 604, hot-blast outlet 902 respectively with the first hot blast
Entrance 303, the second hot-wind inlet 403 are connected.Thus, it is possible to by produce in fine coal drying device 600 dry tail gas supply to
Waste heat recovery processing is dried in dried tail gas waste heat retracting device 900, to produce hot blast, and hot blast block is returned into respectively
Used as hot blast in coal hot blast dense medium separation device 300 and fine coal hot-air flow sorting unit 400.
According to specific embodiment of the utility model, dried more than tail gas using dried tail gas waste heat retracting device 900 pairs
Heat is reclaimed, and produces hot blast.And utilized the hot blast of generation point two parts, it first mixes with normal temperature air all the way, mixes
The temperature control of thermal current is at 90-120 DEG C after conjunction, as lump coal hot blast dense medium separation device 300 after voltage stabilizing bag voltage stabilizing
Separating medium；Secondly Lu Xianyu normal temperature airs mix, after mixing the temperature control of thermal current at 90-130 DEG C, through voltage stabilizing bag voltage stabilizing
Afterwards as the separating medium of fine coal hot-air flow sorting unit 400.
According to specific embodiment of the utility model, as shown in Fig. 2 the system of above-mentioned treatment low-order coal is further included：
Dust arrester 1000, dust arrester 1000 has gas inlet 901, dust outlet 1002 and gas vent 1003, gas inlet
1001 are connected with the first offgas outlet 305 and the second offgas outlet 404 respectively.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 of above-mentioned treatment low-order coal.According to of the present utility model
Specific embodiment, the method includes：
(1) supplying low-order coal carries out break process into low-order coal breaker, to obtain break up coal；
(2) supplying into screening plant break up coal carries out screening process, to respectively obtain lump coal and fine coal；
(3) lump coal is supplied into lump coal hot blast dense medium separation device, and using hot blast and solid dense media to lump coal
Dense medium separation treatment is carried out, to obtain block cleaned coal and the first tail gas；
(4) fine coal is supplied into fine coal hot-air flow sorting unit, and fine coal is carried out at pneumatic separation using hot blast
Reason, to obtain the first powder cleaned coal and the second tail gas；
(5) supplying block cleaned coal carries out break process into block cleaned coal breaker, to obtain the second powder cleaned coal；
(6) the first powder cleaned coal and the second powder cleaned coal are supplied into fine coal drying device, and place is dried using hot blast
Reason, to obtain xeraphium cleaned coal and the 3rd tail gas；
(7) xeraphium cleaned coal is supplied and is gasified into powder coal gasification furnace, to obtain the gas that gasifies；
(8) supply gasification gas carries out the gas waste heat recovery processing that gasifies into gasification gas waste-heat recovery device, to produce
Hot gas, and by hot gas, return to step (3), step (4) and step (6) are used as hot blast respectively.
Low-order coal is crushed, is classified, is sorted, done by the method for the treatment low-order coal of the utility model above-described embodiment
The treatment such as dry, gasification, can effectively remove dirt and the moisture such as sulphur, ash in low-order coal, improve gasification furnace treating capacity and coal
Gas quality.Coupled using by classification and sorting and bed pulverized coal gasification technology, can be improved by the thermal current block/fine coal classification and sorting of raw coal
The efficiency of separation and dehydration rate of lump coal, fine coal；Lump coal carries out crushing energy reduction comminution energy conssumption again after being processed through dense medium separation；Block
Fine coal increases coal with the contact area of dried medium after crushing, and drying efficiency is improved；After the sorted discharge refuse of raw coal, gas is reduced
The specific energy consumption and gas impurity of change process；The waste heat of gasification gas is reclaimed as sorting and dried medium, system energy consumption is reduced
And operating cost, environmental pollution is reduced, meanwhile, improve the effective rate of utilization of low-order coal.
Method below with reference to Fig. 3-4 pairs for the treatment of low-order coal of the utility model embodiment is described in detail.According to this
The embodiment of utility model, the method includes：
S100：Low-order coal is supplied carries out break process into low-order coal breaker
According to specific embodiment of the utility model, low-order coal is supplied carries out broken place into low-order coal breaker
Reason, to obtain break up coal.Thus low-order coal is tentatively crushed in advance, and then can be in order to subsequently be divided lump coal
Choosing, improves spoil separating effect.According to specific example of the present utility model, obtained after broken through low-order coal breaker 100
The granularity of break up coal is less than 80 millimeters.The granularity of the broken break up coal for obtaining is less than 80mm, then the break up coal is supplied to screening
Device 200 carries out screening process, it is possible thereby to reduce the upper size boundary of lump coal separation, reduces the particle size range of lump coal separation, can
To reduce the influence of lump coal separation course grain and improve lump coal separation precision, such that it is able to improve having for gasification medium sized coal
Effect treating capacity, and then gasification gas quality can also be improved.
S200：Break up coal is supplied into screening plant carries out screening process
According to specific embodiment of the utility model, low-order coal is supplied into screening plant carries out screening process, so as 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 millimeters.By
This directly can be supplied to carrying out gasification process in powder coal gasification furnace 700 fine coal of the granularity, and by the lump coal of greater particle size
Gasified again after follow-up crushing, such that it is able to avoid the waste of gasification medium sized coal, and then raw material utilization can be improved
Rate.
S300：Lump coal is supplied into lump coal hot blast dense medium separation device carries out dense medium using hot blast and solid dense media
Matter sorting process
According to specific embodiment of the utility model, lump coal is supplied into lump coal hot blast dense medium separation device, and adopted
Dense medium separation treatment is carried out to lump coal with hot blast and solid dense media, to obtain block cleaned coal and the first tail gas.Thus, utilize
Lump coal hot blast dense medium separation device 300 can sieve the lump coal for obtaining and carry out dense medium separation treatment to screening plant 200, have
Body ground can carry out dense medium separation treatment to lump coal using hot blast and solid-state dense media, and obtain block cleaned coal and the first tail
Gas.The sharpness of separation of lump coal is improve, block can be removed by using lump coal dense medium separation, the density bed that dense media is formed
Most of spoil in coal, reduces lump coal breaking and fine coal energy consumption for drying, improves coal gasification treating capacity.In addition, passing through
Predrying using lump coal dense media, the heat transfer between dense media and low-order coal enhances the drying and dehydrating rate of lump coal, reduces
Dehydration energy.In addition, the outer water of spoil and part in raw coal, the block cleaned coal hardness obtained after sorting can be removed by sorting
Reduce, and then the comminution energy conssumption to block cleaned coal can be saved.
According to specific embodiment of the utility model, solid dense media can be magnetite powder, and thus, solid dense media exists
In the presence of hot blast, gas-solid fluidized medium is collectively forming, and then lump coal is sorted, the most of spoil in removing lump coal.
According to one embodiment of the present utility model, above-mentioned use lump coal hot blast dense medium separation device carries out dense media point
The hot air flow temperature that choosing treatment is used is 100-120 DEG C, and dense media fluidizing velocity is 0.9-1.8m/s, separating density 1.4-
2.0g/cm3.It is possible thereby to further improve the efficiency of separation, the purity of lump coal is improved.
Inventor had found, the spoil in removing lump coal can be effectively sorted using the hot blast of said temperature, and can be with
The moisture on low-order coal surface is taken away, the bonding for reducing (especially between cleaned coal and spoil) between particle during discharge refuse is general
Rate, so as to improve the quality and yield of follow-up gasification product while sorting discharge refuse efficiency is improved.
S400：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 then specific energy consumption and gas impurity in follow-up gasification can be reduced, improve gasification gas product quality.By using
Fine coal hot-air flow is sorted, and reduces the sticking probability between pulverized coal particle, can remove the most of spoil in fine coal, is improved
Fine coal sharpness of separation, improves coal gasification treating capacity, improves gasification gas quality.In addition, by using fine coal hot blast gas
Classification can carry out predrying to fine coal, reduce drying and dehydrating energy consumption.
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.
S500：Block cleaned coal is supplied carries out break process into block cleaned coal breaker
According to specific embodiment of the utility model, block cleaned coal is supplied carries out broken place into block cleaned coal breaker
Reason, 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 significantly carry
Height 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 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.
S600：First powder cleaned coal and the second powder cleaned coal are supplied to fine coal drying device dried process
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.Thus, it is possible to by fine coal hot blast gas
The powder cleaned coal that the powder cleaned coal and the break process of block cleaned coal breaker 500 that the sorting of flow point screening device 400 is obtained are obtained is supplied to powder
In coal drying device 600, 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, by the drying being dried to obtain using above-mentioned fine coal drying device 600
The moisture content of powder cleaned coal is less than 10 weight %.And then treatment, Ke Yixian were dried before gasification process is carried out to low-order coal
Write and improve gasification gas yield.
S700：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.Thus, it is possible to the xeraphium cleaned coal that fine coal drying device 600 is dried to obtain is supplied to powder coal gasification furnace
Gasified in 700, to obtain the gas that gasifies.Thus, above-mentioned powder coal gasification furnace 700 is suitable to the fine coal obtained by above-mentioned screening
Powder cleaned coal with broken gained carries out gasification process, such that it is able to obtain the gas that gasifies.Inventor has found, by just lump coal point
The coupling of choosing, drying and dehydrating and bed pulverized coal gasification technology, can further improve the conversion of the effective rate of utilization and low-order coal of low-order coal
Rate, and then improve gasification gas yield.
According to specific embodiment of the utility model, the temperature gasified in powder coal gasification furnace 700 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.
S800：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 gasification gas waste-heat recovery device and is gasified
Gas waste heat recovery processing, and by hot gas, return to rapid S600 step by step and used as hot blast.
According to specific embodiment of the utility model, the waste heat using the 800 pairs of gasification gas of gas waste-heat recovery device that gasify enters
Promoting the circulation of qi gas waste heat recovery processing, produces hot gas.And utilized the hot gas of generation, hot stream temperature is controlled in 100-200
DEG C, after voltage stabilizing bag voltage stabilizing as fine coal dry fill 600 dried medium.
S900：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, will dry tail gas and supply is carried out into dried tail gas waste heat retracting device
Dried tail gas waste heat is recycled, and by hot blast, return to step S300, step S400 are used as hot blast respectively.
According to specific embodiment of the utility model, dried more than tail gas using dried tail gas waste heat retracting device 600 pairs
Heat is dried waste heat from tail gas recycling, produces hot blast.And the hot blast of generation point two parts are utilized, its all the way first with
Normal temperature air mix, after mixing the temperature control of thermal current at 100-120 DEG C, as lump coal hot blast dense medium after voltage stabilizing bag voltage stabilizing
The separating medium of matter sorting unit 300；Secondly Lu Xianyu normal temperature airs mix, the temperature control of thermal current is in 100- after mixing
130 DEG C, as the separating medium of fine coal hot-air flow sorting unit 400 after voltage stabilizing bag voltage stabilizing.
With reference to Fig. 4, the method for the treatment low-order coal according to the utility model embodiment is further included：
S1000：The second tail gas produced in the first tail gas, the step S400 that will be produced in step S300 is supplied to dedusting dress
Dust removal process is carried out in putting.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 classification and sorting and bed pulverized coal gasification technology
Coupling, the waste heat of gasification gas is reclaimed as sorting and dried medium using gasification gas waste-heat recovery device, reduces system energy consumption
And operating cost, environmental pollution is reduced, meanwhile, improve the effective rate of utilization of low-order coal.
(2) system and method for the treatment low-order coal of the utility model embodiment, by the thermal current block/fine coal point of raw coal
Level sorting can improve the efficiency of separation and dehydration rate of lump coal, fine coal；Crushing energy reduction is carried out after the sorted treatment of lump coal again broken
Energy consumption；Fine coal increases lump coal with the contact area of dried medium after crushing, and drying efficiency is improved；After the sorted discharge refuse of raw coal,
Reduce the specific energy consumption and gas impurity of gasification.
(3) system and method for the treatment low-order coal of the utility model embodiment, by using lump coal dense medium separation, weight
The density bed that medium is formed improves the sharpness of separation of lump coal, can remove the most of spoil in lump coal, reduces lump coal
Broken and fine coal energy consumption for drying, improves coal gasification treating capacity.In addition, by predrying, the dense media using lump coal dense media
Heat transfer between low-order coal enhances the drying and dehydrating rate of lump coal, reduces dehydration energy.
(4) system and method for the treatment low-order coal of the utility model embodiment, treatment lump coal is medium optional or difficult choosing-
Effect is more obvious during the raw coal that fine coal is easily selected.
Embodiment
As shown in Figures 2 and 4, low-order coal is processed.
Specific steps include：
1) raw coal enters low-order coal breaker 100 by run coal bin first, untill granularity is both less than 80mm, into sieve
Separating device 200, is divided into granularity 80-6mm and two particle size fractions of -6mm.
2) lump coal of granularity 80-6mm feeds lump coal hot blast dense medium separation device 300 and is sorted by belt, control
Hot stream temperature is 107 DEG C, and dense media fluidizing velocity is 1.18m/s, separating density 1.69g/cm3, block cleaned coal enters block cleaned coal
Breaker 500 is crushed to below 6mm, obtains powder cleaned coal.The thermal current for just having started with outer confession is situated between as the sorting of lump coal
Matter.
3) fine coal of granularity -6mm feeds fine coal hot-air flow sorting unit 400 and is sorted by belt, controls hot blast
Temperature is 106 DEG C, and ascending air speed is 7.53m/s, obtains powder cleaned coal；The superheated steam of outer confession has just been started with as fine coal
Separating medium.
4) fine coal drying device 600 2) will be fed with the powder cleaned coal for 3) producing, xeraphium moisture content of coal is 7.61 weight %；Just
The superheated steam of outer confession is started with as the dried medium of fine coal.
5) fine coal will be dried and feeds powder coal gasification furnace 700, by 900 DEG C of gasifications, gasifying agent is oxygen/steam, pressure
0.10MPa, gasification gas enters the recovery waste heat of gasification gas waste-heat recovery device 800, produces superheated steam.
6) hot gas will be produced to be utilized in gasification gas waste-heat recovery device 800, hot air temperature is controlled at 100-200 DEG C,
As step 4 after voltage stabilizing bag voltage stabilizing) in fine coal drying device dried medium.
7) hot blast point two parts will be produced in dried tail gas waste heat retracting device 900 to be utilized, wherein all the way first with
Normal temperature air mixes, and hot blast temperature is controlled at 100-120 DEG C after mixing, respectively as step 2 after voltage stabilizing bag voltage stabilizing) medium sized coal
Hot blast dense medium separation device 300 and step 3) in fine coal hot-air flow sorting unit 400 separating medium.
8) tail gas produced in lump coal hot blast dense medium separation device 300, fine coal hot-air flow sorting unit 400 supply to
Dust removal process is carried out in dust arrester 900.
The moisture of low-order coal, ash content, sulphur content analysis result as shown in table 1, dried fine coal is the fine coal before gasification
Moisture, ash content, sulphur content 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.
Table 1：The analysis result of pending raw coal property
| Moisture (wt%) | Ash content (wt%) | Sulphur content (wt%) |
| 28.06 | 21.28 | 1.03 |
Table 2：The analysis result of the coal property of fine coal before gasification
| Moisture (wt%) | Ash content (wt%) | Sulphur content (wt%) |
| 7.41 | 10.68 | 0.640 |
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：
Low-order coal breaker, the low-order coal breaker has low-order coal entrance and broken coal export,
Screening plant, the screening plant has break up coal entrance, lump coal outlet and fine coal outlet, the break up coal entrance and institute
Broken coal export is stated to be connected；
Lump coal hot blast dense medium separation device, the lump coal hot blast dense medium separation device have lump coal entrance, block cleaned coal outlet,
First hot-wind inlet, solid dense media entrance 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；
There is powder coal gasification furnace, the powder coal gasification furnace feeding mouth and gasification gas to export, and the feeding mouth and the xeraphium are smart
Coal export 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 the second offgas outlet respectively.
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| CN108355813A (en) * | 2017-12-28 | 2018-08-03 | 兖矿科技有限公司 | The system of processing and its processing method of energy-efficient coal dust |
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