CN205482272U - System for handle low order coal - Google Patents
System for handle low order coal Download PDFInfo
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- CN205482272U CN205482272U CN201620077710.9U CN201620077710U CN205482272U CN 205482272 U CN205482272 U CN 205482272U CN 201620077710 U CN201620077710 U CN 201620077710U CN 205482272 U CN205482272 U CN 205482272U
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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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 provides a system for handle low order coal, include: low order coal breaker, screening plant, the hot -blast dense medium separation device of lump coal, the hot -blast air current sorting unit of fine coal, piece clean coal breaker, powder coal drying unit, powder coal gasification stove and waste heat recovery device, wherein, screening plant links to each other with low order coal breaker, and hot -blast dense medium separation device of lump coal and the hot -blast air current sorting unit of fine coal link to each other with screening plant respectively, the piece clean coal breaker link to each other with the hot -blast dense medium separation device of lump coal, powder coal drying unit is continuous with piece clean coal breaker and screening plant's fine coal export respectively, the powder coal gasification stove links to each other with powder coal drying unit, waste heat recovery device links to each other with the powder coal gasification stove, and waste heat recovery device links to each other with the hot -blast dense medium separation device of lump coal, the hot -blast air current sorting unit of fine coal and powder coal drying unit respectively. This system has reduced system energy consumption and running cost with hierarchical, sorting of lump coal and the coupling of powder coal gasification technique, reduces environmental pollution.
Description
Technical field
This utility model belongs to chemical field, in particular to a kind of system 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 brown coal, peat, jet coal, weathered coal
Deng.There is due to low-order coal the features such as high-moisture, low heat value, oxidizable, easy argillization, cause it to exist at wet split black water
The shortcomings such as reason is costly, long term storage is oxidizable and the cost of transportation of unit energy is high.
The main Land use systems of present stage low-order coal is direct combustion power generation, although this Land use systems is the simplest
Easy, but cause the significant wastage of the energy, equipment etc..It addition, the thermal efficiency that low-order coal is directly burnt is low, and low-order coal combustion
SOx, CO and NOx etc. can be produced after burning air is caused severe contamination.Low-order coal upgrading processing will become low-order coal Efficient Development
The key utilized.The upgrading processing of low-order coal include sorting, be dried, molding, be pyrolyzed, gasification etc., low-order coal deliming, dehydration after heat
Value increases, and can reduce the corrosion of equipment during following process and reduce the acid rain harm to environment after low-order coal desulfurization, low
Rank coal can expand it by upgrading processing and utilize scope.
Coal separation technology is as the basis of clean coal technology and source, it is possible to the inorganic sulfur of 50-60% in removing raw coal
With major part ash, it it is one of technology the most ripe in clean coal technology, most economical, that industrialization degree is the highest.Although by sorting
The dirt in low-order coal can be removed, but during wet split, coal is fully contacted with water, cause coal selecting product moisture to increase
Greatly, reduce product caloric value, partial offset coal washing effect, also the target with upgrading dehydration contradicts, and the dry method of room temperature
In assorting room, the surface moisture of coal makes the sticking probability between granule big, discharge refuse weak effect.Therefore, selected process system is not
With, separating effect there is also difference.
Individually it is dried and gasification technology improves the calorific value of low-order coal to a certain extent, but ash in upgraded coal, sulfur etc.
Dirt affects the quality of following process product, and the compound such as sulfur-bearing, nitrogen pollutes environment and equipment corrosion.Along with coal
The increasing of charcoal exploitation dynamics, the reserves of high-quality coal resource reduce year by year.Therefore, the Processes For Effective Conversion of low-order coal resource is developed
With violate the law, the sustainable development of coal industry will be had great importance.
To be to improve brown coal calorific value and conversion by the method for dry separation fall ash desulfurization, drying and dehydrating and gasification upgrading
Rate, reduces energy consumption and a kind of effective way of environmental pollution simultaneously, improves Social benefit and economic benefit, meets China's development clean
The strategic demand of clean coal technology energy diversification, the new policy that active response national energy-saving reduces discharging.
Utility model content
One of technical problem that this utility model is intended to solve in correlation technique the most to a certain extent.To this end, this reality
It is to propose a kind of system processing low-order coal by a novel purpose.
According to an aspect of the present utility model, the utility model proposes a kind of system processing low-order coal, including:
Low-order coal breaker, described low-order coal breaker has low-order coal entrance and break up coal outlet,
Screening plant, described screening plant has break up coal entrance, lump coal outlet and fine coal outlet, described break up coal entrance
It is connected with the outlet of described break up coal；
Lump coal hot blast dense medium separation device, described 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, the first offgas outlet and spoil outlet, described lump coal entrance and described piece
Coal export is connected；
Fine coal hot-air flow sorting unit, described 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, described fine coal entrance is connected with the outlet of described fine coal；
Block cleaned coal breaker, described piece of cleaned coal breaker has block cleaned coal entrance and the outlet of the second powder cleaned coal, described
Block cleaned coal entrance is connected with described piece of cleaned coal outlet；
Fine coal drying device, described fine coal drying device has powder cleaned coal entrance, xeraphium cleaned coal exports, the 3rd hot blast enters
Mouth and the 3rd offgas outlet, described powder cleaned coal entrance exports phase with described first powder cleaned coal outlet and described second powder cleaned coal respectively
Even；
Powder coal gasification furnace, described powder coal gasification furnace has the outlet of feeding mouth gentle activating QI, and described feeding mouth is dried with described
The outlet of powder cleaned coal is connected；And
Waste-heat recovery device, described waste-heat recovery device has gasification gas entrance, cooling gasification gas outlet and heat outlet,
The outlet of described gasification gas entrance and described gasification gas is connected, described heat outlet respectively with described first hot-wind inlet, described the
Two hot-wind inlets are connected with described 3rd hot-wind inlet.
Low-order coal is carried out crushing by the system of the process low-order coal of this utility model above-described embodiment, classification, sort, dry
Dry, gasifications etc. process, and can effectively remove dirt and the moisture such as the sulfur in low-order coal, ash, improve gasification furnace treating capacity and coal
Gas quality.Use and classification and sorting and bed pulverized coal gasification technology are coupled, can be improved by the thermal current block/fine coal classification and sorting of raw coal
Lump coal, the efficiency of separation of fine coal and dehydration rate；Lump coal carries out crushing energy after dense medium separation processes again and reduces comminution energy conssumption；Block
Coal fine coal after crushing increases with the contact area of dry medium, and drying efficiency improves；After the sorted discharge refuse of raw coal, decrease gas
The specific energy consumption of change process and gas impurity；Waste heat boiler is used to reclaim the waste heat of gasification gas as sorting and dry medium, fall
Low system energy consumption and operating cost, reduce environmental pollution, meanwhile, improve the effective rate of utilization of low-order coal.
It addition, can also have following additional skill according to the system of the process low-order coal of this utility model above-described embodiment
Art feature:
In this utility model, the system of above-mentioned process low-order coal farther includes:
Dust arrester, described dust arrester has gas inlet, dust outlet and gas outlet, and described gas inlet is respectively
It is connected with described first offgas outlet, the second offgas outlet and the 3rd offgas outlet.
Accompanying drawing explanation
Fig. 1 is the structural representation of the system of the process low-order coal according to one embodiment of this utility model.
Fig. 2 is the structural representation of the system of the process low-order coal according to another embodiment of this utility model.
Fig. 3 is the flow process of the system process low-order coal method of the process low-order coal utilizing one embodiment of this utility model
Figure.
Fig. 4 is the flow process of the system process low-order coal method of the process low-order coal utilizing another embodiment of this utility model
Figure.
Detailed description of the invention
Of the present utility model embodiment is described below in detail, and the example of described embodiment is shown in the drawings, the most ad initio
Represent same or similar element to same or similar label eventually or there is the element of same or like function.Below by ginseng
It is exemplary for examining the embodiment that accompanying drawing describes, it is intended to be used for explaining this utility model, and it is not intended that to this utility model
Restriction.
In description of the present utility model, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width
Degree ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward ", " suitable
Hour hands ", " counterclockwise ", " axially ", " radially ", the orientation of the instruction such as " circumferential " or position relationship be based on orientation shown in the drawings
Or position relationship, be for only for ease of describe this utility model and simplify describe rather than instruction or hint indication 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 instruction or hint relative importance
Or the implicit quantity 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 " are meant that two or two
Above, unless otherwise expressly limited specifically.
In this utility model, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " Gu
Fixed " etc. term should be interpreted broadly, connect for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be
It is mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of element internal or the interaction relationship of two elements.For the ordinary skill in the art, can basis
Concrete condition understands above-mentioned term concrete meaning in this utility model.
In this utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score
Can be that the first and second features directly contact, 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 " permissible
Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second feature.
At an aspect of the present utility model, the utility model proposes a kind of system processing low-order coal.According to this reality
By novel embodiment, this system includes:
Low-order coal breaker, low-order coal breaker has low-order coal entrance and break up coal outlet,
Screening plant, screening plant has break up coal entrance, lump coal outlet and fine coal outlet, break up coal entrance and break up coal
Outlet is connected；
Lump coal hot blast dense medium separation device, lump coal hot blast dense medium separation device has lump coal entrance, block cleaned coal exports,
First hot-wind inlet, solid dense media entrance, the first offgas outlet and spoil outlet, lump coal entrance is connected with lump coal outlet；
Fine coal hot-air flow sorting unit, fine coal hot-air flow sorting unit has fine coal entrance, the first powder cleaned coal exports,
Second hot-wind inlet and the second offgas outlet, fine coal entrance is connected with fine coal outlet；
Block cleaned coal breaker, block cleaned coal breaker has block cleaned coal entrance and the outlet of the second powder cleaned coal, and block cleaned coal enters
Mouth is connected with the outlet of block cleaned coal；
Fine coal drying device, fine coal drying device have powder cleaned coal entrance, xeraphium cleaned coal outlet, the 3rd hot-wind inlet and
3rd offgas outlet, powder cleaned coal entrance is connected with the first powder cleaned coal outlet and the outlet of the second powder cleaned coal respectively；
Powder coal gasification furnace, powder coal gasification furnace has the outlet of feeding mouth gentle activating QI, and feeding mouth exports phase with xeraphium cleaned coal
Even；And
Waste-heat recovery device, waste-heat recovery device has gasification gas entrance, cooling gasification gas outlet and heat outlet, gasification
Gas entrance with gasification gas outlet be connected, heat outlet respectively with the first hot-wind inlet, the second hot-wind inlet and the 3rd hot-wind inlet
It is connected.
Low-order coal is carried out crushing by the system of the process low-order coal of this utility model above-described embodiment, classification, sort, dry
Dry, gasifications etc. process, and can effectively remove dirt and the moisture such as the sulfur in low-order coal, ash, improve gasification furnace treating capacity and coal
Gas quality.Use and classification and sorting and bed pulverized coal gasification technology are coupled, can be improved by the thermal current block/fine coal classification and sorting of raw coal
Lump coal, the efficiency of separation of fine coal and dehydration rate；Lump coal carries out crushing energy after dense medium separation processes again and reduces comminution energy conssumption；Block
Coal fine coal after crushing increases with the contact area of dry medium, and drying efficiency improves；After the sorted discharge refuse of raw coal, decrease gas
The specific energy consumption of change process and gas impurity；The waste heat of recovery gasification gas, as sorting and dry medium, reduces system energy consumption
And operating cost, reduce environmental pollution, meanwhile, improve the effective rate of utilization of low-order coal.
System this utility model embodiment being processed low-order coal below with reference to Fig. 1-2 is described in detail.According to this
The embodiment of utility model, this system includes: low-order coal breaker 100, screening plant 200, lump coal hot blast dense medium separation
Device 300, fine coal hot-air flow sorting unit 400, block cleaned coal breaker 500, fine coal are dried and fill 600, powder coal gasification furnace 700
With waste-heat recovery device 800.
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.The most in advance low-order coal is tentatively crushed, and then spoil can be improved so that follow-up lump coal being sorted
Separating effect.According to concrete example of the present utility model, the granularity of the break up coal obtained after low-order coal breaker 100 is broken
Less than 80 millimeters.
According to specific embodiment of the utility model, the granularity of the above-mentioned broken break up coal obtained is less than 80mm, then should
Break up coal supply carries out screening process to screening plant 200, thus can reduce the upper size boundary of lump coal separation, reduce lump coal and divide
The particle size range of choosing, can reduce the impact of lump coal separation course grain and improve lump coal separation precision, such that it is able to improve gas
Effective treating capacity of lump coal during change, and then gasification gas quality can also be improved.
According to specific embodiment of the utility model, screening plant 200 has break up coal entrance 201, lump coal outlet 202 and
Fine coal outlet 203, break up coal entrance 201 is connected with break up coal outlet 102.Thus, utilize the screening plant 200 can be to after broken
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 obtains is not higher than 6mm, thus can be straight
Connect will the fine coal supply of this granularity to carrying out gasification process in powder coal gasification furnace 700, and by the lump coal of greater particle size through follow-up again
Secondary broken laggard circulation of qi promoting, such that it is able to avoid the waste of gasification medium sized coal, and then can improve raw material availability.
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 outlet the 302, first hot-wind inlet 303, solid dense media entrance the 304, first offgas outlet 305 and spoil outlet 306,
Lump coal entrance 301 is connected with lump coal outlet 202.
Thus, the lump coal utilizing lump coal hot blast dense medium separation device 300 can obtain screening plant 200 screening is carried out
Dense medium separation processes, and specifically can use hot blast and solid-state dense media that lump coal carries out dense medium separation process, and obtain
To block cleaned coal and the first tail gas.By using lump coal dense medium separation, the density bed that dense media is formed improves dividing of lump coal
Select precision, 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.It addition, by using lump coal dense media predrying, the heat transmission between dense media and low-order coal enhances lump coal
Drying and dehydrating rate, reduces dehydration energy.It addition, the spoil in raw coal and the outer water of part can be removed through sorting, after sorting
The block cleaned coal hardness obtained reduces, and then can save the comminution energy conssumption to block cleaned coal.
According to specific embodiment of the utility model, fine coal hot-air flow sorting unit 400 have fine coal entrance 401,
One powder cleaned coal outlet the 402, second hot-wind inlet 403 and the second offgas outlet 404, fine coal entrance 401 and fine coal export 203 phases
Even.Thus can remove the spoil in fine coal, 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 to sort, reduce the sticking probability between pulverized coal particle, can remove
Most of spoil in fine coal, improves fine coal sharpness of separation, improves coal gasification treating capacity, improves gasification gas quality.
It addition, by using the sorting of fine coal hot-air flow can carry out predrying to fine coal, reduce drying and dehydrating energy consumption.
According to specific embodiment of the utility model, block cleaned coal breaker 500 has block cleaned coal entrance 501 and the second powder
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
Put the block cleaned coal supply that 300 sortings obtain and carry out break process to block cleaned coal breaker 500, in order to obtain powder cleaned coal.By
This, the lump coal breaking that can would prove unsuitable for gasification further becomes fine coal, and then significantly improves and can improve low-order coal further
Effective rate of utilization and the conversion ratio of low-order coal, and then improve gasification gas productivity.
According to specific embodiment of the utility model, the granularity of the broken fine coal obtained is less than 6 millimeters.And then be more suitable for
Follow-up gasification process, can improve the effective rate of utilization of low-order coal and the conversion ratio of low-order coal further, and then improve gasification
Gas productivity.
According to specific embodiment of the utility model, fine coal drying device 600 has powder cleaned coal entrance 601, xeraphium essence
Coal export the 602, the 3rd hot-wind inlet 603 and the 3rd offgas outlet 604, powder cleaned coal entrance 601 exports with the first powder cleaned coal respectively
402 are connected with the second powder cleaned coal outlet 502.
Thus, it is possible to the powder cleaned coal that the sorting of fine coal hot-air flow sorting unit 400 is obtained and block cleaned coal breaker 500
The powder cleaned coal that break process obtains supplies to fine coal drying device 600, and uses hot blast to be dried process, in order to done
Dry powder cleaned coal and the 3rd tail gas.
According to specific embodiment of the utility model, dry by use above-mentioned fine coal drying device 600 to be dried to obtain
The moisture content of powder cleaned coal is less than 10 weight %.And then before low-order coal is carried out gasification process, it is dried process, Ke Yixian
Write and improve gasification gas productivity.
According to specific embodiment of the utility model, powder coal gasification furnace 700 has feeding mouth 701 gentle activating QI 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 supply is gasified to powder coal gasification furnace 700, in order to obtain the gas that gasifies.Thus, above-mentioned powder coal gasification furnace 700 is suitable to upper
The powder cleaned coal 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 Crinis Carbonisatus
Existing, coupled by just lump coal separation, drying and dehydrating and bed pulverized coal gasification technology, effective utilization of low-order coal can be improved further
Rate and the conversion ratio of low-order coal, and then improve gasification gas productivity.
According to specific embodiment of the utility model, the temperature carrying out in powder coal gasification furnace 700 gasifying is limited the most especially
System, those skilled in the art can select according to actual needs, according to specific embodiment of the utility model, the temperature of gasification
Degree can be 900-1100 degree Celsius.
According to specific embodiment of the utility model, waste-heat recovery device 800 has gasification gas entrance 801, cooling gasification
Gas outlet 802 and heat outlet 803, gasification gas entrance 801 is connected with gasification gas outlet 702, and heat outlet 803 is respectively with first
Hot-wind inlet the 303, second hot-wind inlet 403 is connected with the 3rd hot-wind inlet 603.Thus, it is possible to produce in powder coal gasification furnace 700
Raw gasification gas supply carries out waste heat recovery processing to waste-heat recovery device 800, in order to produces steam, and is returned respectively by steam
Return in lump coal hot blast dense medium separation device 300, fine coal hot-air flow sorting unit 400 and fine coal drying device 600 as heat
Wind uses.
According to specific embodiment of the utility model, utilize waste-heat recovery device 800 that the waste heat of gasification gas is reclaimed,
Produce steam.And dividing three parts to utilize the steam of generation, one Lu Xianyu normal temperature air mixes, thermal current after mixing
Temperature controls at 100-120 DEG C, as the separating medium of lump coal hot blast dense medium separation device 300 after voltage stabilizing bag voltage stabilizing；Its
Two roads first mix with normal temperature air, and after mixing, the temperature of thermal current controls at 100-130 DEG C, as fine coal after voltage stabilizing bag voltage stabilizing
The separating medium of hot-air flow sorting unit 400；3rd road hot stream temperature controls at 100-200 DEG C, after voltage stabilizing bag voltage stabilizing
The dry medium filling 600 it is dried as fine coal.
According to specific embodiment of the utility model, as in figure 2 it is shown, the system of above-mentioned process low-order coal farther includes:
Dust arrester 900, dust arrester 900 has gas inlet 901, dust outlet 902 and gas outlet 903, gas inlet 901 points
It is not connected with first offgas outlet the 305, second offgas outlet 404 and the 3rd offgas outlet 604.Thus can reduce environment dirty
Dye.
Understand the system of the process low-order coal of this utility model above-described embodiment for convenience, detailed below with reference to Fig. 3-4
Describing the method that the system of the process low-order coal utilizing this utility model specific embodiment processes low-order coal, the method includes:
(1) low-order coal supply is carried out break process to low-order coal breaker, in order to obtain break up coal；
(2) break up coal supply is carried out screening process to screening plant, in order to respectively obtain lump coal and fine coal；
(3) lump coal is supplied to lump coal hot blast dense medium separation device, and use hot blast and solid dense media to lump coal
Carry out dense medium separation process, in order to obtain block cleaned coal and the first tail gas；
(4) fine coal is supplied to fine coal hot-air flow sorting unit, and use hot blast that fine coal is carried out at pneumatic separation
Reason, in order to obtain the first powder cleaned coal and the second tail gas；
(5) supply of block cleaned coal is carried out break process to block cleaned coal breaker, in order to obtain the second powder cleaned coal；
(6) the first powder cleaned coal and the second powder cleaned coal are supplied to fine coal drying device, and use hot blast to be dried place
Reason, in order to obtain xeraphium cleaned coal and the 3rd tail gas；
(7) supply of xeraphium cleaned coal is gasified to powder coal gasification furnace, in order to obtain the gas that gasifies；
(8) supply of gasification gas is carried out waste heat recovery processing to waste-heat recovery device, in order to produce steam, and by heat
Gas, returns step (3), step (4) and step (6) respectively and uses as hot blast.
Low-order coal is carried out crushing by the method for the process low-order coal of this utility model above-described embodiment, classification, sort, dry
Dry, gasifications etc. process, and can effectively remove dirt and the moisture such as the sulfur in low-order coal, ash, improve gasification furnace treating capacity and coal
Gas quality.Use and classification and sorting and bed pulverized coal gasification technology are coupled, can be improved by the thermal current block/fine coal classification and sorting of raw coal
Lump coal, the efficiency of separation of fine coal and dehydration rate；Lump coal carries out crushing energy after dense medium separation processes again and reduces comminution energy conssumption；Block
Coal fine coal after crushing increases with the contact area of dry medium, and drying efficiency improves；After the sorted discharge refuse of raw coal, decrease gas
The specific energy consumption of change process and gas impurity；The waste heat of recovery gasification gas, as sorting and dry medium, reduces system energy consumption
And operating cost, reduce environmental pollution, meanwhile, improve the effective rate of utilization of low-order coal.
Method this utility model embodiment being processed low-order coal below with reference to Fig. 3-4 is described in detail.According to this
The embodiment of utility model, the method includes:
S100: low-order coal supply is carried out break process to low-order coal breaker
According to specific embodiment of the utility model, low-order coal supply to low-order coal breaker will carry out broken place
Reason, in order to obtain break up coal.The most in advance low-order coal is tentatively crushed, and then can be so that follow-up lump coal being carried out point
Choosing, improves spoil separating effect.According to concrete example of the present utility model, obtain after low-order coal breaker 100 is broken
The granularity of break up coal is less than 80 millimeters.The granularity of the broken break up coal obtained is less than 80mm, then the supply of this break up coal is extremely sieved
Device 200 carries out screening process, thus can reduce the upper size boundary of lump coal separation, reduces the particle size range of lump coal separation, can
To reduce the impact of lump coal separation course grain and to improve lump coal separation precision, such that it is able to improve having of gasification medium sized coal
Effect treating capacity, and then gasification gas quality can also be improved.
S200: break up coal supply is carried out screening process to screening plant
According to specific embodiment of the utility model, low-order coal supply is carried out screening process to screening plant, in order to
Respectively obtain lump coal and fine coal.The granularity of the lump coal that above-mentioned screening obtains is not less than 6 millimeters, and the granularity of fine coal is less than 6 millimeters.By
The fine coal of this granularity directly can be supplied and carry out gasification process to powder coal gasification furnace 700 by this, and by the lump coal of greater particle size
Gasify 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: hot blast and solid dense media will be used to carry out dense medium in lump coal supply to lump coal hot blast dense medium separation device
Matter sorting process
According to specific embodiment of the utility model, lump coal is supplied to lump coal hot blast dense medium separation device, and adopts
With hot blast and solid dense media, lump coal is carried out dense medium separation process, in order to obtain block cleaned coal and the first tail gas.Thus, utilize
The lump coal that screening plant 200 screening can be obtained by lump coal hot blast dense medium separation device 300 carries out dense medium separation process, tool
Can use hot blast and solid-state dense media that lump coal carries out dense medium separation process body, and obtain block cleaned coal and the first tail
Gas.By using lump coal dense medium separation, the density bed that dense media is formed improves the sharpness of separation of lump coal, can remove block
Most of spoil in coal, reduces lump coal breaking and fine coal energy consumption for drying, improves coal gasification treating capacity.It addition, pass through
Using lump coal dense media predrying, the heat transmission between dense media and low-order coal enhances the drying and dehydrating rate of lump coal, reduces
Dehydration energy.It addition, the spoil in raw coal and the outer water of part, the block cleaned coal hardness obtained after sorting can be removed through 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
Under hot wind action, it is collectively forming gas-solid fluidized medium, and then lump coal is sorted, the most of spoil in removing lump coal.
According to an embodiment of the present utility model, above-mentioned employing lump coal hot blast dense medium separation device carries out dense media and divides
Choosing processes the hot air flow temperature used and is 100-120 DEG C, and dense media fluidizing velocity is 0.9-1.8m/s, separating density 1.4-
2.0g/cm3.Thus can improve the efficiency of separation further, improve the purity of lump coal.
Inventor finds, uses the hot blast of said temperature can effectively sort the spoil in removing lump coal, and permissible
Take away the moisture on low-order coal surface, reduce during discharge refuse the bonding of (especially between cleaned coal and spoil) between granule general
Rate, thus while improving sorting discharge refuse efficiency, improve quality and the productivity of follow-up gasification product.
S400: hot blast will be used to carry out pneumatic separation process in fine coal supply to fine coal hot-air flow sorting unit
According to specific embodiment of the utility model, fine coal is supplied to fine coal hot-air flow sorting unit, and uses
Hot blast carries out pneumatic separation process to fine coal, in order to obtain the first powder cleaned coal and the second tail gas.Thus can remove in 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 sorts, and reduces the sticking probability between pulverized coal particle, can remove the most of spoil in fine coal, improves
Fine coal sharpness of separation, improves coal gasification treating capacity, improves gasification gas quality.It addition, by using fine coal hot blast gas
Fine coal can be carried out predrying by classification, reduces drying and dehydrating energy consumption.
According to an embodiment of the present utility model, the temperature of the hot blast used in fine coal hot-air flow sorting unit is not
Being particularly limited, those skilled in the art can select according to actual needs, according to specific embodiment of the utility model,
The temperature of hot blast can be 100-130 degree 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 also
Being not particularly limited, those skilled in the art can select according to actual needs, is embodied as according to of the present utility model
Example, the flow velocity of hot blast can be 4-9m/s.Inventor finds, uses the hot blast of this flow rates can effectively sort removing powder
Spoil in coal, and the moisture on low-order coal surface can be taken away, reduce during discharge refuse between granule (especially cleaned coal with
Between spoil) bonding probability, thus improve quality and the productivity of follow-up gasification product while improving sorting discharge refuse efficiency.
S500: the supply of block cleaned coal is carried out break process to block cleaned coal breaker
According to specific embodiment of the utility model, block cleaned coal supply to block cleaned coal breaker will carry out broken place
Reason, in order to obtain the second powder cleaned coal.Thus, it is possible to the lump coal breaking that would prove unsuitable for gasification further becomes fine coal, and then significantly carry
The high effective rate of utilization of low-order coal and the conversion ratio of low-order coal of can improving further, and then improve gasification gas productivity.
According to specific embodiment of the utility model, the granularity of the broken fine coal obtained is less than 6 millimeters.And then be more suitable for
Follow-up gasification process, can improve the effective rate of utilization of low-order coal and the conversion ratio of low-order coal further, and then improve gasification
Gas productivity.
S600: the first powder cleaned coal and the second powder cleaned coal are supplied to fine coal drying device dried
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 use hot blast to be dried process, in order 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 classification device 400 powder cleaned coal that obtains of sorting and block cleaned coal breaker 500 break process obtain supplies to powder
In coal drying device 600, and hot blast is used to be dried process, in order to obtain xeraphium cleaned coal and the 3rd tail gas.
According to specific embodiment of the utility model, dried uses the temperature of hot blast can be 100-200 degree Celsius,
Thus can improve drying efficiency further.According to specific embodiment of the utility model, above-mentioned dried uses hot blast
Air velocity can be 0.1-0.5m/s.Thus can improve drying efficiency further.
According to specific embodiment of the utility model, dry by use above-mentioned fine coal drying device 600 to be dried to obtain
The moisture content of powder cleaned coal is less than 10 weight %.And then before low-order coal is carried out gasification process, it is dried process, Ke Yixian
Write and improve gasification gas productivity.
S700: the supply of xeraphium cleaned coal is gasified to powder coal gasification furnace
According to specific embodiment of the utility model, the supply of xeraphium cleaned coal is gasified to powder coal gasification furnace, with
Just the gas that gasifies is obtained.Thus, it is possible to the xeraphium cleaned coal being dried to obtain by fine coal drying device 600 supplies to powder coal gasification furnace
Gasify in 700, in order to obtain the gas that gasifies.Thus, the fine coal obtained by above-mentioned powder coal gasification furnace 700 is suitable to above-mentioned screening
Gasification process is carried out, such that it is able to obtain the gas that gasifies with the powder cleaned coal of broken gained.Inventor finds, is divided by just lump coal
Choosing, drying and dehydrating and bed pulverized coal gasification technology coupling, can improve the effective rate of utilization of low-order coal and the conversion of low-order coal further
Rate, and then improve gasification gas productivity.
According to specific embodiment of the utility model, the temperature carrying out in powder coal gasification furnace 700 gasifying is limited the most especially
System, those skilled in the art can select according to actual needs, according to specific embodiment of the utility model, the temperature of gasification
Degree can be 900-1100 degree Celsius.
S800: the supply of gasification gas is carried out waste heat recovery processing to waste-heat recovery device
According to specific embodiment of the utility model, the supply of gasification gas is carried out at waste heat recovery to waste-heat recovery device
Reason, and by steam, return step S300, step S400 and step S600 respectively and use as hot blast.
According to specific embodiment of the utility model, utilize waste-heat recovery device 800 that the waste heat of gasification gas is carried out waste heat
Recycling, produces steam.And dividing three parts to utilize the steam of generation, one Lu Xianyu normal temperature air mixes, mixing
The temperature of rear thermal current controls at 100-120 DEG C, dividing as lump coal hot blast dense medium separation device 300 after voltage stabilizing bag voltage stabilizing
Selected introductions matter；Its two road first mixes with normal temperature air, and after mixing, the temperature of thermal current controls at 100-130 DEG C, through voltage stabilizing bag voltage stabilizing
Afterwards as the separating medium of fine coal hot-air flow sorting unit 400；3rd road hot stream temperature controls at 100-200 DEG C, through steady
It is dried the dry medium filling 600 as fine coal after pressure bag voltage stabilizing.
With reference to Fig. 4, farther include according to the method for the process low-order coal of this utility model embodiment:
S900: by the second tail gas produced in the first tail gas produced in step S300, step S400 and step S600
The 3rd tail gas supply produced carries out dust removal process to dust arrester.Thus can reduce environmental pollution.
The system of the process low-order coal of this utility model above-described embodiment and utilize this system process low-order coal method extremely
There is one of following effect less:
(1) system and method for the process low-order coal of this utility model embodiment, by classification and sorting and bed pulverized coal gasification technology
Coupling, uses the waste heat of waste heat boiler recovery gasification gas as sorting and dry medium, reduces system energy consumption and operating cost,
Reduce environmental pollution, meanwhile, improve the effective rate of utilization of low-order coal.
(2) system and method for the process low-order coal of this utility model embodiment, is divided by the thermal current block/fine coal of raw coal
Level sorting can improve lump coal, the efficiency of separation of fine coal and dehydration rate；Carry out crushing energy after the sorted process of lump coal again and reduce broken
Energy consumption；Lump coal fine coal after crushing increases with the contact area of dry medium, and drying efficiency improves；After the sorted discharge refuse of raw coal,
Decrease specific energy consumption and the gas impurity of gasification.
(3) system and method for the process low-order coal of this 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, reduce lump coal
Crush and fine coal energy consumption for drying, improve coal gasification treating capacity.It addition, by using lump coal dense media predrying, dense media
And the heat transmission between low-order coal enhances the drying and dehydrating rate of lump coal, reduces dehydration energy.
(4) system and method for the process low-order coal of this utility model embodiment, process the medium optional or difficult choosing of lump coal-
During the raw coal that fine coal easily selects, effect is the most obvious.
Embodiment
As shown in Figures 2 and 4, processing low-order coal, the analysis result of low-order coal character is as shown in table 1.
Concrete steps include:
1) first raw coal is entered low-order coal breaker 100 by run coal bin, until granularity is both less than 80mm, enters 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 by belt and sorts, and controls
Hot stream temperature is 105 DEG C, and dense media fluidizing velocity is 1.20m/s, separating density 1.72g/cm3, block cleaned coal enters block cleaned coal
Breaker 500 is crushed to below 6mm, obtains powder cleaned coal.Just start with thermal current sorting Jie as lump coal of outer confession
Matter.
3) fine coal of granularity-6mm feeds fine coal hot-air flow sorting unit 400 by belt and sorts, and controls hot blast
Temperature is 105 DEG C, and ascending air speed is 7.73m/s, obtains powder cleaned coal；Just start with the superheated steam of outer confession as fine coal
Separating medium.
4) by 2) and 3) the powder cleaned coal that produces feeds fine coal drying device 600, xeraphium moisture content of coal is 7.81 weight %；Just
Start with the superheated steam dry medium as fine coal of outer confession.
5) dry fine coal being fed powder coal gasification furnace 700, by 950 DEG C of gasifications, gasifying agent is oxygen/steam, pressure
0.10MPa, gasification gas enters waste heat boiler 800 recovery waste heat, produces superheated steam.
6) dividing three parts to utilize by producing superheated steam in waste heat boiler 800, wherein a road is first mixed with normal temperature air
Closing, after mixing, hot blast temperature controls at 100-120 DEG C, respectively as step 2 after voltage stabilizing bag voltage stabilizing) medium sized coal hot blast dense media
Sorting unit 300 and step 3) in the separating medium of fine coal hot-air flow sorting unit 400；An other road hot blast temperature controls
100-200 DEG C, as step 4 after voltage stabilizing bag voltage stabilizing) in the dry medium of fine coal drying device.
7) lump coal hot blast dense medium separation device 300, fine coal hot-air flow sorting unit 400 and fine coal drying device 600
The tail gas supply of interior generation carries out dust removal process to dust arrester 900.
The moisture of pending low-order coal, ash, sulphur content, calorific value analysis result as shown in table 1, dried fine coal i.e. gas
The moisture of the fine coal before change, ash, sulphur content, calorific value analysis result as shown in table 2, the gas composition obtained is as shown in table 3.
The method low-order coal treating capacity using the present embodiment can reach 300,000 tons/year, and processing particle size range is wholegrain degree
Level, the full water of low-order coal is 25.06 weight %.
Table 1: the analysis result of pending raw coal character
Table 2: the analysis result of the coal character of fine coal before gasification
| Moisture (wt%) | Ash (wt%) | Sulphur content (wt%) | Lower heat value (kcal/kg) |
| Mt | Aad | St,ad | Qnet,v,ad |
| 7.81 | 11.68 | 0.64 | 5895.84 |
Table 3: gas composition result (V%)
| CO | H2 | CH4 | CO2 | N2 |
| 52.07 | 27.29 | 3.50 | 15.29 | 1.08 |
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment of the present utility model or example.In this manual, the schematic table to above-mentioned term
State that be not necessarily referring to is identical embodiment or example.And, the specific features of description, structure, material or feature can be
Any one or multiple embodiment or example combine in an appropriate manner.Additionally, in the case of the most conflicting, this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be carried out by technical staff
In conjunction with and combination.
Although above it has been shown and described that embodiment of the present utility model, it is to be understood that above-described embodiment is
Exemplary, it is impossible to it is interpreted as that those of ordinary skill in the art is in scope of the present utility model to restriction of the present utility model
In above-described embodiment can be changed, revise, replace and modification.
Claims (2)
1. the system processing low-order coal, it is characterised in that including:
Low-order coal breaker, described low-order coal breaker has low-order coal entrance and break up coal outlet,
Screening plant, described screening plant has break up coal entrance, lump coal outlet and fine coal outlet, described break up coal entrance and institute
State break up coal outlet to be connected；
Lump coal hot blast dense medium separation device, described lump coal hot blast dense medium separation device has lump coal entrance, block cleaned coal exports,
First hot-wind inlet, solid dense media entrance, the first offgas outlet and spoil outlet, described lump coal entrance exports with described lump coal
It is connected；
Fine coal hot-air flow sorting unit, described fine coal hot-air flow sorting unit has fine coal entrance, the first powder cleaned coal exports,
Second hot-wind inlet and the second offgas outlet, described fine coal entrance is connected with the outlet of described fine coal；
Block cleaned coal breaker, described piece of cleaned coal breaker has block cleaned coal entrance and the outlet of the second powder cleaned coal, described piece of essence
Coal entrance is connected with described piece of cleaned coal outlet；
Fine coal drying device, described fine coal drying device have powder cleaned coal entrance, xeraphium cleaned coal outlet, the 3rd hot-wind inlet and
3rd offgas outlet, described powder cleaned coal entrance is connected with described first powder cleaned coal outlet and described second powder cleaned coal outlet respectively；
Powder coal gasification furnace, described powder coal gasification furnace has the outlet of feeding mouth gentle activating QI, described feeding mouth and described xeraphium essence
Coal export is connected；And
Waste-heat recovery device, described waste-heat recovery device has gasification gas entrance, cooling gasification gas outlet and heat outlet, described
Gasification gas entrance and described gasification gas outlet is connected, described heat outlet respectively with described first hot-wind inlet, described second hot
Wind entrance is connected with described 3rd hot-wind inlet.
The system of process low-order coal the most according to claim 1, it is characterised in that farther include:
Dust arrester, described dust arrester has gas inlet, dust outlet and gas outlet, described gas inlet respectively with institute
State the first offgas outlet, the second offgas outlet and the 3rd offgas outlet to be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620077710.9U CN205482272U (en) | 2016-01-27 | 2016-01-27 | System for handle low order coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620077710.9U CN205482272U (en) | 2016-01-27 | 2016-01-27 | System for handle low order coal |
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| Publication Number | Publication Date |
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| CN205482272U true CN205482272U (en) | 2016-08-17 |
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ID=56619654
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620077710.9U Withdrawn - After Issue CN205482272U (en) | 2016-01-27 | 2016-01-27 | System for handle low order coal |
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| Country | Link |
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2016
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Address after: 102200 Beijing city Changping District Machi Town cow Road No. 18 Patentee after: Shenwu science and technology group Limited by Share Ltd Address before: 102200 Beijing city Changping District Machi Town cow Road No. 18 Patentee before: Beijing Shenwu Environment Energy Technology Group Co., Ltd. |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20160817 Effective date of abandoning: 20180608 |