CN205537053U - System for handle low order coal - Google Patents
System for handle low order coal Download PDFInfo
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- CN205537053U CN205537053U CN201620078120.8U CN201620078120U CN205537053U CN 205537053 U CN205537053 U CN 205537053U CN 201620078120 U CN201620078120 U CN 201620078120U CN 205537053 U CN205537053 U CN 205537053U
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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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The utility model provides a system for handle low order coal, include: screening plant, the hot -blast combined type dry method sorting device of lump coal, piece clean coal breaker, powder coal drying unit, powder coal gasification stove and waste heat recovery device, wherein, the hot -blast combined type dry method sorting device of lump coal links to each other with screening plant's lump coal export, the piece clean coal breaker link to each other with the hot -blast combined type dry method sorting 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's heat outlet links to each other with powder coal drying unit with the hot -blast combined type dry method sorting device of lump coal respectively. Above -mentioned system for handle low order coal adopts the waste heat conduct of waste heat recovery device recovery gas gasification to select separately and drying medium lump coal sorting, dry dehydration and the coupling of powder coal gasification technique, has reduced system energy consumption and running cost, reduces environmental pollution.
Description
Technical field
The utility model belongs to chemical field, in particular to a kind of system processing low-order coal.
Background technology
Low-order coal mainly includes non caking coal, weakly caking coal, jet coal and brown coal etc., have that moisture is high, density is little, volatile matter is high,
Do not cohere, chemical reactivity is strong, poor heat stability and the feature such as caloric value is low.China's low-order coal resource proved reserves are also 2000
Hundred million more than t, the reserves of low-order coal account for and verify more than the 55% of coal reserves, and wherein lignite resource reserves accounts for whole nation coal
Charcoal verifies the 12.69% of reserves, is mainly distributed on east Inner Mongolia, Xinjiang, Eastern of Heilongjiang Province and Eastern Yunnan.
The thermal efficiency that low-order coal is directly burnt is low, and the discharge capacity of greenhouse gases is the biggest, it is difficult to large-scale develop and utilize.Low
Rank coal is processed without upgrading, it may be difficult to meet the quality requirement of multiple user, and low-order coal Efficient Development profit is processed in upgrading
Key.The upgrading processing of low-order coal includes sorting, is dried, is molded, is pyrolyzed, gasification etc., low-order coal deliming, dehydration
Rear calorific 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-order coal can expand it by upgrading processing and utilize scope.
Although the dirt in low-order coal can be removed by sorting, but during wet split, coal is fully contacted with water, makes
Becoming coal selecting product moisture to increase, reduce product caloric value, partial offset coal washing effect, also with the target phase of upgrading dehydration
Contradiction, and during the dry separation of normal temperature, the surface moisture of coal makes the sticking probability between particle big, separating effect is poor.
Individually it is dried and gasification technology improves the calorific value of low-order coal to a certain extent, but the dirts such as ash in upgraded coal, sulphur
Affect the quality of following process product, and the compound such as sulfur-bearing, nitrogen pollutes environment and equipment corrosion.Therefore, exploitation is new
High ash low-order coal utilization ways become the research direction that low-order coal deep processing is new.
Utility model content
One of technical problem that the utility model is intended to solve in correlation technique the most to a certain extent.To this end, this practicality is new
One purpose of type is that proposition processes the system of low-order coal.
According to an aspect of the present utility model, the utility model proposes a kind of system processing low-order coal.According to this practicality
Novel embodiment, this system includes:
Screening plant, described screening plant has low-order coal entrance, lump coal outlet and fine coal outlet；
Lump coal hot blast compound sorting unit by dry method, described lump coal hot blast compound sorting unit by dry method has lump coal entrance, block
Cleaned coal outlet, the first hot-wind inlet and the first offgas outlet, described lump coal entrance is connected with the outlet of described lump coal；
Block cleaned coal breaker, described piece of cleaned coal breaker has block cleaned coal entrance and the outlet of powder cleaned coal, and described block of cleaned coal enters
Mouth is connected with described piece of cleaned coal outlet；
Fine coal drying device, described fine coal drying device has fine coal entrance, xeraphium coal export, the second hot-wind inlet and
Two offgas outlet, described fine coal entrance is connected with the outlet of described fine coal and the outlet of described powder cleaned coal respectively；
Powder coal gasification furnace, described powder coal gasification furnace has feeding mouth and gasification gas outlet, described feeding mouth and described dry fine coal
Outlet is connected；And
Waste-heat recovery device, described waste-heat recovery device has gasification gas entrance, cooling gasification gas outlet and heat outlet, institute
State gasification gas entrance and described gasification gas outlet to be connected, described heat outlet respectively with described first hot-wind inlet and described second
Hot-wind inlet is connected.
Thus, according to the system of the process low-order coal of the utility model embodiment by lump coal separation, drying and dehydrating and coal gasification
Technology couple, use waste-heat recovery device reclaim gasification gas waste heat as sorting and dry medium, reduce system energy consumption and
Operating cost, reduces environmental pollution, meanwhile, improves effective rate of utilization and the conversion ratio of low-order coal of low-order coal.Raw coal is through de-
Water fall ash carrying out gasification after processing again can reduce the dirt content in the energy consumption of gasification and product.
It addition, it is special to have following additional technology according to the system of the process low-order coal of the utility model above-described embodiment
Levy:
In the utility model, the system of described process low-order coal farther includes: dust arrester, and described dust arrester has
Gas inlet, dust outlet and gas vent, described gas inlet respectively with described first offgas outlet and the second offgas outlet
It is connected.
Accompanying drawing explanation
Fig. 1 is the structural representation of the system of the process low-order coal according to one embodiment of the utility model.
Fig. 2 is the structural representation of the system of the process low-order coal according to another embodiment of the utility model.
Fig. 3 is the flow chart of the system process low-order coal method of the process low-order coal utilizing one embodiment of the utility model.
Fig. 4 is the flow chart of the system process low-order coal method of the process low-order coal utilizing another embodiment of the utility model.
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 from start to finish
Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached
The embodiment that figure describes is exemplary, it is intended to be used for explaining the utility model, and it is not intended that to limit of the present utility model
System.
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 ",
Orientation or the position relationship of the instruction such as " clockwise ", " counterclockwise ", " axially ", " radially ", " circumferential " are based on shown in the drawings
Orientation or position relationship, be for only for ease of and describe the utility model and simplify description rather than instruction or the dress of hint indication
Put or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the utility model
Restriction.
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 be expressed or hidden
One or more this feature are included containing ground.In description of the present utility model, " multiple " be meant that two or two with
On, unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing "
Should be interpreted broadly Deng term, 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 individual element internal or the interaction relationship of two elements.For the ordinary skill in the art, Ke Yigen
Above-mentioned term concrete meaning in the utility model is understood according to concrete condition.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can
Being that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, the
One feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper,
Or it is merely representative of fisrt feature level height higher than second feature.Fisrt feature second feature " under ", " lower section " and " under
Face " can be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than the
Two features.
At an aspect of the present utility model, the utility model proposes a kind of system processing low-order coal.New according to this practicality
The embodiment of type, this system includes: screening plant, and described screening plant has low-order coal entrance, lump coal outlet and fine coal and goes out
Mouthful；Lump coal hot blast compound sorting unit by dry method, described lump coal hot blast compound sorting unit by dry method has lump coal entrance, block
Cleaned coal outlet, the first hot-wind inlet and the first offgas outlet, described lump coal entrance is connected with the outlet of described lump coal；Block cleaned coal breaks
Crushing device, described piece of cleaned coal breaker has block cleaned coal entrance and the outlet of powder cleaned coal, described piece of cleaned coal entrance and described piece of essence
Coal export is connected；Fine coal drying device, described fine coal drying device has fine coal entrance, xeraphium coal export, the second hot blast
Entrance and the second offgas outlet, described fine coal entrance is connected with the outlet of described fine coal and the outlet of described powder cleaned coal respectively；Fine coal gas
Changing stove, described powder coal gasification furnace has feeding mouth and gasification gas outlet, and described feeding mouth is connected with described xeraphium coal export；
And waste-heat recovery device, described waste-heat recovery device has gasification gas entrance, cooling gasification gas outlet and heat outlet, institute
State gasification gas entrance and described gasification gas outlet to be connected, described heat outlet respectively with described first hot-wind inlet and described second
Hot-wind inlet is connected.
Thus, according to the system of the process low-order coal of the utility model embodiment by lump coal separation, drying and dehydrating and coal gasification
Technology couple, use waste-heat recovery device reclaim gasification gas waste heat as sorting and dry medium, reduce system energy consumption and
Operating cost, reduces environmental pollution, meanwhile, improves effective rate of utilization and the conversion ratio of low-order coal of low-order coal.Raw coal is through de-
Water fall ash carrying out gasification after processing again can reduce the dirt content in the energy consumption of gasification and product.
System the utility model embodiment being processed low-order coal below with reference to Fig. 1-2 is described in detail.According to this practicality
Novel embodiment, this system includes: screening plant 100, lump coal hot blast compound sorting unit by dry method 200, block cleaned coal are broken
Crushing device 300, fine coal drying device 400, powder coal gasification furnace 500 and waste-heat recovery device 600.
According to specific embodiment of the utility model, screening plant 100 has low-order coal entrance 101, lump coal outlet 102 and
Fine coal outlet 103.Thus, utilize screening plant 100 low-order coal can be carried 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 direct
The fine coal of this granularity is supplied to powder coal gasification furnace 500, carries out gasification process, and by the lump coal of greater particle size through follow-up broken
After gasify again, 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 compound sorting unit by dry method 200 have lump coal entrance 201,
Block cleaned coal outlet the 202, first hot-wind inlet 203 and the first offgas outlet 204, described lump coal entrance 201 goes out with described lump coal
Mouth 102 is connected.Thus, lump coal hot blast compound sorting unit by dry method 200 is utilized can screening plant 100 screening to be obtained
Lump coal carry out sorting process, specifically can use hot blast that lump coal carries out sorting process, and obtain block cleaned coal and first
Tail gas.By using lump coal hot blast compound sorting unit by dry method can improve the efficiency of separation and lump coal purity further, and then
Quality raw materials are provided for follow-up gasification.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 arrived reduces, and then can save the comminution energy conssumption to block cleaned coal.
According to specific embodiment of the utility model, described piece of cleaned coal breaker 300 has block cleaned coal entrance 301 and powder essence
Coal export 302, described piece of cleaned coal entrance 301 is connected with described piece of cleaned coal outlet 202.Thus, it is possible to lump coal hot blast is multiple
The block cleaned coal supply that the sorting of box-like dry separation device 200 obtains carries out break process to block cleaned coal breaker 300, with
Just powder cleaned coal is obtained.Thus, it is possible to the lump coal breaking that would prove unsuitable for gasification further becomes fine coal, and then significantly improve low-order coal
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 after being more suitable for
Continuous 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, described fine coal drying device 400 has fine coal entrance 401, is dried fine coal
Outlet the 402, second hot-wind inlet 403 and the second offgas outlet 404, described fine coal entrance 401 exports with described fine coal respectively
103 are connected with described powder cleaned coal outlet 302.Thus, it is possible to the fine coal and the block cleaned coal that screening plant 100 screening are obtained break
The powder cleaned coal that crushing device 300 break process obtains supplies to fine coal drying device 400, and uses hot blast to be dried process,
To obtain being dried fine coal and the second tail gas.
Moisture content from there through the dry fine coal using above-mentioned fine coal drying device 400 to be dried to obtain is less than 10 weight %.Enter
And before low-order coal is carried out gasification process, it is dried process, gasification gas productivity can be significantly improved.
According to specific embodiment of the utility model, described powder coal gasification furnace 500 has feeding mouth 501 and gasification gas outlet 502,
Described feeding mouth 501 is connected with described xeraphium coal export 402.Thus, it is possible to fine coal drying device 400 is dried to obtain
The supply of dry fine coal to described powder coal gasification furnace 500 gasifies, in order to obtain the gas that gasifies.Thus, above-mentioned fine coal gas
The powder cleaned coal changing the fine coal obtained by stove 500 is suitable to above-mentioned screening and broken gained carries out gasification process, such that it is able to obtain
Gasification gas.Inventor finds, is coupled by just lump coal separation, drying and dehydrating and bed pulverized coal gasification technology, can carry further
The effective rate of utilization of low-order and high-order coal and the conversion ratio of low-order coal, and then improve gasification gas productivity.
According to specific embodiment of the utility model, the temperature carrying out in powder coal gasification furnace 500 gasifying is not particularly restricted,
Those skilled in the art can select according to actual needs, according to specific embodiment of the utility model, the temperature of gasification
Can be 900-1100 degree Celsius.
According to specific embodiment of the utility model, described waste-heat recovery device 600 has gasification gas entrance 601, cooling gas
Changing gas outlet 602 and heat outlet 603, described gasification gas entrance 601 is connected with described gasification gas outlet 502, described heat
Gas outlet 603 is connected with described first hot-wind inlet 203 and described second hot-wind inlet 403 respectively.Thus, it is possible to by powder
The gasification gas supply produced in coal gasifier 500 carries out waste heat recovery processing to described waste-heat recovery device 600, in order to produce
Heat gas, and described hot gas is returned respectively in lump coal hot blast compound sorting unit by dry method 200 and fine coal drying device 400
Use as hot blast.
According to specific embodiment of the utility model, waste-heat recovery device 600 can be reclaimed thermogenetic hot gas more than gasification gas
Being divided into two parts to utilize, wherein a road hot gas first mixes with normal temperature air, and mixing after heat airflow temperature-control is at 100-130
Degree Celsius, as separating medium in return lump coal hot blast compound sorting unit by dry method 200 after voltage stabilizing bag voltage stabilizing；Other one
Road hot air temperature controls at 100-200 degree Celsius, and in returning drying device 400 after voltage stabilizing bag voltage stabilizing, conduct is dried medium.
Thus can save energy consumption further.
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: remove
Dirt device 700, described dust arrester 700 has gas inlet 701, dust outlet 702 and gas vent 703, described tail
Gas entrance 701 is connected with the first offgas outlet 204 and the second offgas outlet 404 respectively.Thus can reduce environmental pollution.
The system of the process low-order coal of the utility model above-described embodiment by the sorting of low-order coal, be dried, gasification technology integrated,
By the spoil in hot blast combined type sorting removing raw coal and the outer water of part；Cleaned coal crushing strength after sorting reduces, and reduces
Comminution energy conssumption；Use the waste heat of waste heat boiler recovery gasification gas as sorting and dry medium, reduce system energy consumption and operation
Cost, reduces environmental pollution, meanwhile, improves the effective rate of utilization of low-order coal.
Understand the system of the process low-order coal of the utility model above-described embodiment for convenience, describe in detail below with reference to Fig. 3-4
Utilizing the method that the system of the process low-order coal of the utility model specific embodiment processes low-order coal, the method includes:
(1) supply of described low-order coal is carried out screening process to described screening plant, in order to respectively obtain lump coal and fine coal；
(2) described lump coal is supplied to described lump coal hot blast compound sorting unit by dry method, and use hot blast to described lump coal
Carry out sorting process, in order to obtain block cleaned coal and the first tail gas；
(3) described piece of cleaned coal supply is carried out break process to described piece of cleaned coal breaker, in order to obtain powder cleaned coal；
(4) described fine coal and described powder cleaned coal are supplied to described fine coal drying device, and use hot blast to be dried process,
To obtain being dried fine coal and the second tail gas；
(5) supply of described dry fine coal is gasified to described powder coal gasification furnace, in order to obtain the gas that gasifies；
(6) supply of described gasification gas is carried out waste heat recovery processing to described waste-heat recovery device, in order to produce hot gas, and
Described hot gas is returned respectively step (2) and (4) use as described hot blast.
Thus, according to the method for the process low-order coal of the utility model embodiment by lump coal separation, drying and dehydrating and coal gasification
Technology couple, use waste-heat recovery device reclaim gasification gas waste heat as sorting and dry medium, reduce system energy consumption and
Operating cost, reduces environmental pollution, meanwhile, improves effective rate of utilization and the conversion ratio of low-order coal of low-order coal.Raw coal is through de-
Water fall ash carrying out gasification after processing again can reduce the dirt content in the energy consumption of gasification and product.
Method the utility model embodiment being processed low-order coal below with reference to Fig. 3-4 is described in detail.According to this practicality
Novel embodiment, the method includes:
S100: low-order 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 described 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.
Thus directly the fine coal of this granularity can be supplied and carry out gasification process to powder coal gasification furnace 500, and by the block of greater particle size
Coal gasifies after follow-up crushing again, such that it is able to avoid the waste of gasification medium sized coal, and then can improve raw material profit
By rate.
S200: hot blast will be used to carry out sorting process in lump coal supply to lump coal hot blast compound sorting unit by dry method
By using lump coal hot blast compound sorting unit by dry method can improve the efficiency of separation and lump coal purity, Jin Erwei further
Follow-up gasification provides quality raw materials.It addition, the spoil in raw coal and the outer water of part can be removed through sorting, obtain after sorting
Block cleaned coal hardness reduce, and then the comminution energy conssumption to block cleaned coal can be saved.
According to an embodiment of the present utility model, the temperature of the hot blast used in lump coal hot blast compound sorting unit by dry method 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 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 lump coal hot blast compound sorting unit by dry method
Being not particularly restricted, those skilled in the art can select according to actual needs, according to concrete reality of the present utility model
Executing example, the flow velocity of hot blast can be 8-23m/s.Inventor finds, uses the hot blast of this flow rates can effectively sort de-
Except the spoil in low-order coal, and the moisture on low-order coal surface can be taken away, reduce during discharge refuse between particle (especially
Between cleaned coal and spoil) bonding probability, thus improve the matter of follow-up gasification product while improving sorting discharge refuse efficiency
Amount and productivity.
S300: the supply of block cleaned coal is carried out break process to block cleaned coal breaker
According to specific embodiment of the utility model, in embodiments more of the present utility model, by the supply of block cleaned coal to block essence
The particle diameter carrying out the powder cleaned coal that break process obtains in coal breaker is not particularly restricted, and such as granularity can be less than 6 millis
Rice.The powder cleaned coal obtained after thus crushing is more suitable for follow-up gasification, and then can significantly put forward the effective rate of utilization of low-order coal
And conversion ratio, thus reduce cost of material further, improve gasification gas productivity.
S400: fine coal and powder cleaned coal are supplied and uses hot blast to be dried process to fine coal drying device
According to specific embodiment of the utility model, it is dried process and uses the temperature of hot blast can be 100-200 degree Celsius, by
This can improve drying efficiency further.According to specific embodiment of the utility model, the above-mentioned dry gas processing employing hot blast
Flow Velocity can be 0.1-0.5m/s.Thus can improve drying efficiency further.
According to specific embodiment of the utility model, the moisture content of the dry fine coal obtained through above-mentioned dry process is less than 10 weights
Amount %.Thus can improve gasification efficiency further.Inventor finds, by fine coal is dried the water reducing gasification of coal
Point, reduce the dehydration energy of gasification, thus improve the quality of gasification gas, improve gasification gas productivity.
S500: the supply of dry fine coal is gasified to powder coal gasification furnace
According to specific embodiment of the utility model, the dry fine coal obtained after above-mentioned dry process is supplied to powder coal gasification furnace
In gasify, in order to obtain gasify gas.Granularity according to the dry fine coal in supply of the present utility model to powder coal gasification furnace
Less than 6 millimeters.Thus can significantly reduce gasification energy consumption, improve gasification efficiency.
According to specific embodiment of the utility model, the temperature carrying out in gasification furnace gasifying is not particularly restricted, the most permissible
For 900-1100 degree Celsius.Thus can improve gasification efficiency further.
S600: the supply of gasification gas is carried out waste heat recovery processing to waste-heat recovery device, and the hot gas of generation is returned respectively
S200 and S400 uses as hot blast
According to specific embodiment of the utility model, the UTILIZATION OF VESIDUAL HEAT IN waste heat recovery dress of the gasification gas obtained will be produced in gasification furnace
Put, such as, can be that waste heat boiler reclaims, and then produce hot gas.And divide two parts to utilize the hot gas of generation,
Wherein a road hot gas first mixes with normal temperature air, and mixing after heat airflow temperature-control is at 100-130 degree Celsius, steady through voltage stabilizing bag
The step S200 separating medium as lump coal hot blast compound sorting unit by dry method is returned after pressure；An other road hot air temperature controls
At 100-200 degree Celsius, after voltage stabilizing bag voltage stabilizing, return the step S400 dry medium as drying device.Thus can enter
One step saves energy consumption.
With reference to Fig. 4, farther include according to the method for the process low-order coal of the utility model embodiment:
S700: the tail gas produced in S200 and S400 supply is carried out dust removal process to dust arrester
By to the tail discharged in drying device in step S200 medium sized coal hot blast compound sorting unit by dry method and step S400
Gas carries out dust removal process in dust arrester, thus can reduce environmental pollution.
The method of the process low-order coal of the utility model above-described embodiment uses sorting, is dried and the method for gasification upgrading, the party
Method by the sorting of low-order coal, be dried, gasification technology integrated, by hot blast combined type dry separation removing raw coal in spoil and
The outer water of part；Cleaned coal crushing strength after sorting reduces, and reduces comminution energy conssumption；Waste-heat recovery device is used to reclaim gasification gas
Waste heat as sorting and dry medium, reduce system energy consumption and operating cost, reduce environmental pollution, meanwhile, improve low
The effective rate of utilization of rank coal.
Below with reference to specific embodiment, the utility model is described, it should be noted that these embodiments are only retouched
The property stated, and limit the utility model never in any form.
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 low-order coal is sent into screening plant 100 by run coal bin by belt and feeder.Classified rear granularity is+6mm
Material feeds lump coal hot blast compound sorting unit by dry method 200 by belt and sorts, and controls hot stream temperature 105 DEG C,
Ascending air speed 16.76m/s, block cleans ash is 12.74%, and moisture is 22.08%.Block cleaned coal be crushed to-6mm with
Under.Just start with the hot gas of outer confession as separating medium.
2) the powder cleaned coal of-6mm that the material of the granularity-6mm of screening plant 100 and block cleaned coal breaker 300 produce passes through
Belt feeds fine coal drying device 400, thermal current from bottom enter fine coal drying device 400, hot stream temperature at 190 DEG C,
Air velocity 0.3m/s, is dried the moisture 7.03% of fine coal.Just start with the hot gas dry medium as fine coal of outer confession.
3) dried fine coal, feeds powder coal gasification furnace 500, gasification temperature 950 DEG C by conveying worm, and gasifying agent is
Oxygen/steam, pressure 0.10MPa, the coal gas that gasification produces enters waste heat boiler 600 recovery waste heat, produces hot gas.
4) waste heat boiler 600 can reclaim thermogenetic hot gas more than gasification gas be divided into two parts and utilize, a wherein road heat
Gas first mixes with normal temperature air, and mixing after heat airflow temperature-control, at 100-130 degree Celsius, returns block after voltage stabilizing bag voltage stabilizing
As separating medium in coal hot blast compound sorting unit by dry method 200；An other road hot air temperature controls at 100-200 Celsius
Degree, in returning drying device 400 after voltage stabilizing bag voltage stabilizing, conduct is dried medium.
5) lump coal hot blast compound sorting unit by dry method 200 and the interior tail gas supply produced of fine coal drying device 400 fill to dedusting
Put and in 700, carry out dust removal process.
The moisture of pending low-order coal, ash content, 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 content, sulphur content, calorific value analysis result as shown in table 2, the gas composition obtained such as table 3 institute
Show.
The method low-order coal treating capacity using the present embodiment can reach 300,000 tons/year, and processing particle size range is full particle size fraction, low
The full water of rank coal is 30.15 weight %.
Table 1: the analysis result of pending raw coal character
Table 2: the analysis result of coal character before gasification
Table 3: gas composition result (V%)
| CO | H2 | CH4 | CO2 | N2 |
| 34.16 | 33.92 | 2.59 | 28.32 | 0.42 |
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " concrete example ",
Or specific features, structure, material or the feature bag that the description of " some examples " etc. means to combine this embodiment or example describes
It is contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be in office
One or more embodiments 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 tied by technical staff
Close 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 example
Property, it is impossible to being interpreted as restriction of the present utility model, those of ordinary skill in the art can in the range of the utility model
Above-described embodiment be changed, revise, to replace and modification.
Claims (2)
1. the system processing low-order coal, it is characterised in that including:
Screening plant, described screening plant has low-order coal entrance, lump coal outlet and fine coal outlet；
Lump coal hot blast compound sorting unit by dry method, described lump coal hot blast compound sorting unit by dry method has lump coal entrance, block
Cleaned coal outlet, the first hot-wind inlet and the first offgas outlet, described lump coal entrance is connected with the outlet of described lump coal；
Block cleaned coal breaker, described piece of cleaned coal breaker has block cleaned coal entrance and the outlet of powder cleaned coal, and described block of cleaned coal enters
Mouth is connected with described piece of cleaned coal outlet；
Fine coal drying device, described fine coal drying device has fine coal entrance, xeraphium coal export, the second hot-wind inlet and
Two offgas outlet, described fine coal entrance is connected with the outlet of described fine coal and the outlet of described powder cleaned coal respectively；
Powder coal gasification furnace, described powder coal gasification furnace has feeding mouth and gasification gas outlet, described feeding mouth and described dry fine coal
Outlet is connected；And
Waste-heat recovery device, described waste-heat recovery device has gasification gas entrance, cooling gasification gas outlet and heat outlet, institute
State gasification gas entrance and described gasification gas outlet to be connected, described heat outlet respectively with described first hot-wind inlet and described second
Hot-wind inlet is connected.
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 vent, described gas inlet respectively with
Described first offgas outlet and the second offgas outlet are connected.
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|---|---|---|---|
| CN201620078120.8U CN205537053U (en) | 2016-01-27 | 2016-01-27 | System for handle low order coal |
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| CN201620078120.8U CN205537053U (en) | 2016-01-27 | 2016-01-27 | System for handle low order coal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571303A (en) * | 2016-01-27 | 2016-05-11 | 北京神雾环境能源科技集团股份有限公司 | System and method for treating low-rank coals |
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2016
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571303A (en) * | 2016-01-27 | 2016-05-11 | 北京神雾环境能源科技集团股份有限公司 | System and method for treating low-rank coals |
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