CN105537120B - The system and method for handling low-order coal - Google Patents
The system and method for handling low-order coal Download PDFInfo
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- CN105537120B CN105537120B CN201610053772.0A CN201610053772A CN105537120B CN 105537120 B CN105537120 B CN 105537120B CN 201610053772 A CN201610053772 A CN 201610053772A CN 105537120 B CN105537120 B CN 105537120B
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 619
- 239000003245 coal Substances 0.000 title claims abstract description 619
- 238000004140 cleaning Methods 0.000 claims abstract description 203
- 238000000034 method Methods 0.000 claims abstract description 143
- 238000000197 pyrolysis Methods 0.000 claims abstract description 102
- 238000000926 separation method Methods 0.000 claims abstract description 93
- 239000007789 gas Substances 0.000 claims abstract description 80
- 239000002918 waste heat Substances 0.000 claims abstract description 41
- 239000007787 solid Substances 0.000 claims abstract description 37
- 238000011084 recovery Methods 0.000 claims abstract description 31
- 238000009434 installation Methods 0.000 claims abstract description 30
- 239000002245 particle Substances 0.000 claims description 68
- 239000000843 powder Substances 0.000 claims description 62
- 239000000428 dust Substances 0.000 claims description 59
- 238000001035 drying Methods 0.000 claims description 28
- 238000005453 pelletization Methods 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 10
- 238000007873 sieving Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 abstract description 14
- 238000005516 engineering process Methods 0.000 description 24
- 230000000694 effects Effects 0.000 description 19
- 239000000463 material Substances 0.000 description 19
- SZVJSHCCFOBDDC-UHFFFAOYSA-N Iron(II,III) oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 16
- 239000002994 raw material Substances 0.000 description 16
- 239000003795 chemical substances by application Substances 0.000 description 14
- NINIDFKCEFEMDL-UHFFFAOYSA-N sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 12
- 239000005864 Sulphur Substances 0.000 description 11
- 238000005265 energy consumption Methods 0.000 description 11
- 230000015572 biosynthetic process Effects 0.000 description 9
- 238000005755 formation reaction Methods 0.000 description 9
- 239000004215 Carbon black (E152) Substances 0.000 description 8
- 150000002430 hydrocarbons Chemical class 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000003077 lignite Substances 0.000 description 6
- 230000000087 stabilizing Effects 0.000 description 6
- 239000002699 waste material Substances 0.000 description 6
- 230000005587 bubbling Effects 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 235000013399 edible fruits Nutrition 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003317 industrial substance Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching Effects 0.000 description 2
- 238000010334 sieve classification Methods 0.000 description 2
- 238000010129 solution processing Methods 0.000 description 2
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 238000005039 chemical industry Methods 0.000 description 1
- 230000002860 competitive Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000001808 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010980 drying distillation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000036961 partial Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/08—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form in the form of briquettes, lumps and the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
-
- 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
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention discloses the system and method for processing low-order coal, the system includes：Low-order coal breaker；Low-order coal screening plant；Lump coal hot blast dense medium separation device, with the outlet of lump coal entrance, the first hot-wind inlet, the first solid dense media entrance and the first cleaned coal；Fine coal hot blast dense medium separation device, with the outlet of fine coal entrance, the second hot-wind inlet, the second dense media entrance and the second cleaned coal；Cleaned coal breaker；Shaped device；Pyrolysis installation, with feeding mouth, semicoke outlet and pyrolysis oil gas vent；Waste-heat recovery device, waste-heat recovery device has semicoke entrance and heat outlet, and semicoke entrance is connected with pyrolysis installation, and heat outlet is connected with the first hot-wind inlet and the second hot-wind inlet.The system can significantly improve the rate of discharging refuse of low-order coal, so as to improve the quality and yield of pyrolysis product in follow-up pyrolytic process, and by the way that the waste heat recovery produced in pyrolytic process is used for into discharge refuse process, can significantly reduce energy cost.
Description
Technical field
The invention belongs to technical field of coal chemical industry, specifically, the present invention relates to a kind of system for handling low-order coal and side
Method.
Background technology
The characteristics of coal resources in China is rich coal, oil-poor, few gas, and coal is in China's energy within long period of time
Status will not change.The rich reserves of low-order coal in coal resources, predict, low-order coal accounts for coal according to International Geological scholar
The 60% of resource reserve, is one of following utilizable main energy sources, be distributed mainly on Australia, the U.S., Russia, in
State, Indonesia, Germany and all states in Eastern Europe etc..Low-order coal mainly includes non caking coal, weakly caking coal, jet coal and lignite etc., with moisture
It is high, density is small, volatile matter is high, do not cohere, chemical reactivity is strong, heat endurance is poor and the low feature of caloric value.
Although coal fully connects with water during can removing the dirt in low-order coal, wet split by sorting
Touch, cause coal selecting product moisture to increase, reduce product caloric value, partial offset coal washing effect, the mesh being also dehydrated with upgrading
Mark is contradicted, and the surface moisture of coal make it that the sticking probability between particle is big during the dry separation of normal temperature, discharge refuse effect
Difference.Although single drying and low temperature distillation technology improve ash, sulphur in the calorific value of low-order coal, upgraded coal to a certain extent
The compounds such as the quality of following process product, and sulfur-bearing, nitrogen are influenceed to pollute environment and equipment corrosion Deng dirt.Cause
This, develops new low-order coal process for upgrading, and the industrial chemicals for providing super quality and competitive price for low-order coal deep processing turns into new research side
To.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.Therefore, the present invention
One purpose is to propose a kind of system and method for handling low-order coal, and the system can significantly improve the rate of discharging refuse of low-order coal,
So as to improve the quality and yield of pyrolysis product in follow-up pyrolytic process, and by by the waste heat produced in pyrolytic process
Reclaim for discharge refuse process, energy cost can be significantly reduced.
In one aspect of the invention, the present invention proposes a kind of system for handling low-order coal.According to the implementation of the present invention
Example, the system includes：
Low-order coal breaker, the low-order coal breaker has low-order coal entrance and broken coal export；
Low-order coal screening plant, the low-order coal screening plant has break up coal entrance, lump coal outlet and fine coal outlet；
Lump coal hot blast dense medium separation device, the lump coal hot blast dense medium separation device has lump coal entrance, the first heat
Wind entrance, the first solid dense media entrance, the outlet of the first spoil, the outlet of the first cleaned coal and the first offgas outlet, the lump coal enter
Mouth is connected with lump coal outlet；
Fine coal hot blast dense medium separation device, the fine coal hot blast dense medium separation device has fine coal entrance, the second heat
Wind entrance, the second solid dense media entrance, the outlet of the second spoil, the outlet of the second cleaned coal and the second offgas outlet, the fine coal enter
Mouth is connected with fine coal outlet；
Cleaned coal breaker, the cleaned coal breaker has cleaned coal entrance and powder outlet, the cleaned coal entrance and institute
The outlet of the second cleaned coal is stated to be connected；
Shaped device, the shaped device has powder entrance and pelletizing outlet, and the powder entrance goes out with the powder
Mouth is connected；
Pyrolysis installation, the pyrolysis installation has feeding mouth, semicoke outlet and pyrolysis oil gas vent, the feeding mouth and institute
The outlet of the first cleaned coal is stated with pelletizing outlet to be connected；And
Waste-heat recovery device, the waste-heat recovery device has semicoke entrance, the outlet of cooling semicoke and heat outlet, described
Semicoke entrance is connected with semicoke outlet, and the heat outlet enters with first hot-wind inlet and second hot blast respectively
Mouth is connected.
Thus, the system of processing low-order coal according to embodiments of the present invention with classification by classification and sorting technology by drying skill
Art is coupled, and low-order coal is crushed in advance, classification is sorted and dried respectively again after handling, and improves the efficiency of separation of low-order coal,
It can significantly reduce and load is handled in subsequent process, and significantly reduce the generation of haze in processing procedure, while using dense media
Screening gained lump coal and fine coal are sorted respectively, the sharpness of separation of lump coal and fine coal can be significantly improved, so that the row of raising
Energy consumption is pyrolyzed in cash efficiency, and then reduction subsequent process, thus not only realizes and dries and discharge refuse integration, and pass through drying
Processing can remove the moisture on lump coal and fine coal surface, (especially cleaned coal and cash so as to reduce in assorting room between particle
Between stone) bonding probability, solve the problem of existing combined type discharge refuse technology is low to low-order coal rate of discharging refuse, and solve
Semicoke calorific value after pyrolysis is low, high ash content and the problem of high sulphur content, i.e., can be significantly improved and was pyrolyzed using the system of the present invention
The quality of pyrolysis product in journey, while by the way that processing is dried before pyrolysis processing is carried out to low-order coal, can significantly carry
Hydrocarbon yield in high pyrolytic process, secondly by by dense medium separation and pyrolytic technique organic integration, cleverly by pyrolytic process
The waste heat of middle generation be used for lump coal dense medium separation and fine coal dense medium separation process, can significantly reduce the processing procedure energy into
This, resupplies to pyrolysis after being crushed, be molded successively additionally by the cleaned coal for obtaining fine coal hot blast dense medium separation device
Pyrolysis processing is carried out in device, raw material availability can be significantly improved, and then reduce cost of material.
In addition, the system of processing low-order coal according to the above embodiment of the present invention can also have technology additional as follows special
Levy：
In some embodiments of the invention, the system of the processing low-order coal further comprises：Cleaned coal screening plant, institute
Cleaned coal screening plant is stated to export with the first cleaned coal entrance, the upper cleaned coal outlet of sieve and the lower cleaned coal of sieve, the first cleaned coal entrance and
First cleaned coal outlet is connected, and cleaned coal outlet is connected with the feeding mouth on the sieve, under the sieve cleaned coal export with it is described
Cleaned coal entrance is connected.Thus, it is possible to significantly improve raw material availability.
In some embodiments of the invention, the system of the processing low-order coal further comprises：Dust arrester, it is described to remove
Dirt device has gas inlet, gas vent and a dust outlet, the gas inlet and first offgas outlet and described the
Two offgas outlets are connected, and the dust outlet is connected with the powder entrance.Thus, it is possible to further improve raw material availability.
In another aspect of the invention, the present invention proposes a kind of method for handling low-order coal.According to the reality of the present invention
Example is applied, this method is carried out using the system of processing low-order coal described above.According to a particular embodiment of the invention, this method
Including：
(1) low-order coal is supplied and carries out break process into the low-order coal breaker, to obtain break up coal；
(2) break up coal is supplied and carries out screening process into the low-order coal screening plant, so as to obtain lump coal and
Fine coal；
(3) lump coal is supplied into the lump coal hot blast dense medium separation device using the first hot blast and the first solid
Dense media is sorted and drying process to the lump coal, to respectively obtain the first spoil, the first cleaned coal and containing dust
First tail gas；
(4) fine coal is supplied into the fine coal hot blast dense medium separation device using the second hot blast and the second solid
Dense media is sorted and drying process to the fine coal, to respectively obtain the second spoil, the second cleaned coal and containing dust
Second tail gas；
(5) second cleaned coal is supplied and carries out break process into the cleaned coal breaker, to obtain powder；
(6) powder is supplied and forming processes is carried out into the shaped device, to obtain pelletizing；
(7) first cleaned coal and the pelletizing are supplied and pyrolysis processing is carried out into the pyrolysis installation, to obtain
Semicoke and pyrolysis oil gas；And
(8) semicoke is supplied to the waste-heat recovery device and carries out waste heat recovery processing, to obtain cooling down semicoke
And hot gas, and a part of return to step (3) of the hot gas is used as first hot blast, by another portion of the hot gas
Point return to step (4) is used as second hot blast.
Thus, the method for processing low-order coal according to embodiments of the present invention with classification by classification and sorting technology by drying skill
Art is coupled, and low-order coal is crushed in advance, classification is sorted and dried respectively again after handling, and improves the efficiency of separation of low-order coal,
It can significantly reduce and load is handled in subsequent process, and significantly reduce the generation of haze in processing procedure, while using dense media
Screening gained lump coal and fine coal are sorted respectively, the sharpness of separation of lump coal and fine coal can be significantly improved, so that the row of raising
Energy consumption is pyrolyzed in cash efficiency, and then reduction subsequent process, thus not only realizes and dries and discharge refuse integration, and pass through drying
Processing can remove the moisture on lump coal and fine coal surface, (especially cleaned coal and cash so as to reduce in assorting room between particle
Between stone) bonding probability, solve the problem of existing combined type discharge refuse technology is low to low-order coal rate of discharging refuse, and solve
Semicoke calorific value after pyrolysis is low, high ash content and the problem of high sulphur content, i.e., can be significantly improved and was pyrolyzed using the method for the present invention
The quality of pyrolysis product in journey, while by the way that processing is dried before pyrolysis processing is carried out to low-order coal, can significantly carry
Hydrocarbon yield in high pyrolytic process, secondly by by dense medium separation and pyrolytic technique organic integration, cleverly by pyrolytic process
The waste heat of middle generation be used for lump coal dense medium separation and fine coal dense medium separation process, can significantly reduce the processing procedure energy into
This, resupplies to pyrolysis after being crushed, be molded successively additionally by the cleaned coal for obtaining fine coal hot blast dense medium separation device
Pyrolysis processing is carried out in device, raw material availability can be significantly improved, and then reduce cost of material.
In addition, the method for processing low-order coal according to the above embodiment of the present invention can also have technology additional as follows special
Levy：
In some embodiments of the invention, the method for the processing low-order coal further comprises：(9) by described first
Cleaned coal is supplied into the pyrolysis installation before carrying out pyrolysis processing, supplies first cleaned coal to the cleaned coal sieve in advance
Screening process is carried out in device, to obtain sieving upper cleaned coal and the lower cleaned coal of sieve, and cleaned coal on the sieve is supplied to the pyrolysis
Device, cleaned coal under the sieve is supplied to the cleaned coal breaker.Thus, it is possible to significantly improve raw material availability.
In some embodiments of the invention, the method for the processing low-order coal further comprises：(10) contain described
First tail gas of dust and second tail gas containing dust supply and dust removal process are carried out into the dust arrester, to receive
Collect dust, and the dust return to step (6) and the powder are subjected to the forming processes.Thus, it is possible to further improve
Raw material availability.
In some embodiments of the invention, in step (1), the particle diameter of the break up coal is not higher than 80mm.Thus, may be used
To significantly improve follow-up separation efficiency.
In some embodiments of the invention, in step (3), in step (3), the temperature of first hot blast is
60~110 degrees Celsius, the first dense media fluidizing velocity is 0.8~1.7m/s, and separating density is 1.3~1.9g/cm3.Thus, may be used
To significantly improve drying and the discharge refuse efficiency of lump coal.
In some embodiments of the invention, in step (4), the temperature of second hot blast is 60~110 degrees Celsius,
Second dense media fluidizing velocity is 0.7~1.6m/s, and separating density is 1.3~1.9g/cm3.Thus, it is possible to significantly improve fine coal
Drying and discharge refuse efficiency.
In some embodiments of the invention, in step (2), the particle diameter of the lump coal is not less than 6mm.
In some embodiments of the invention, in step (9), the particle diameter of cleaned coal is not less than 10mm on the sieve.
In some embodiments of the invention, in step (5), the particle diameter of the powder is not higher than 3mm.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from description of the accompanying drawings below to embodiment is combined
Substantially and be readily appreciated that, wherein：
Fig. 1 is the system structure diagram of processing low-order coal according to an embodiment of the invention；
Fig. 2 is the system structure diagram of the processing low-order coal according to further embodiment of the present invention；
Fig. 3 is the system structure diagram of the processing low-order coal according to another embodiment of the invention；
Fig. 4 is the method flow schematic diagram of processing low-order coal according to an embodiment of the invention；
Fig. 5 is the method flow schematic diagram of the processing low-order coal according to further embodiment of the present invention；
Fig. 6 is the method flow schematic diagram of the processing low-order coal according to another embodiment of the invention；
Fig. 7 is the system structure diagram of the processing low-order coal according to another embodiment of the invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description, rather than indicate or imply that the device or element of meaning must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In the description of the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected to by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, unless otherwise clear and definite restriction.For one of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are directly contacted, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In one aspect of the invention, the present invention proposes a kind of system for handling low-order coal.According to the implementation of the present invention
Example, the system includes：Low-order coal breaker, the low-order coal breaker has low-order coal entrance and broken coal export；It is low
Rank screen separating device, the low-order coal screening plant has break up coal entrance, lump coal outlet and fine coal outlet；Lump coal hot blast dense medium
Matter sorting unit, the lump coal hot blast dense medium separation device has lump coal entrance, the first hot-wind inlet, the first solid dense media
Entrance, the outlet of the first spoil, the outlet of the first cleaned coal and the first offgas outlet, the lump coal entrance are connected with lump coal outlet；
Fine coal hot blast dense medium separation device, the fine coal hot blast dense medium separation device has fine coal entrance, the second hot-wind inlet,
Two solid dense media entrances, the outlet of the second spoil, the outlet of the second cleaned coal and the second offgas outlet, the fine coal entrance and the powder
Coal export is connected；Cleaned coal breaker, the cleaned coal breaker has cleaned coal entrance and a powder outlet, the cleaned coal entrance with
The second cleaned coal outlet is connected；Shaped device, the shaped device has powder entrance and pelletizing outlet, the powder entrance
It is connected with the powder outlet；Pyrolysis installation, the pyrolysis installation has feeding mouth, semicoke outlet and pyrolysis oil gas vent, institute
State feeding mouth exported with first cleaned coal and the pelletizing outlet be connected；And waste-heat recovery device, the waste heat recovery dress
Put with semicoke entrance, the outlet of cooling semicoke and heat outlet, the semicoke entrance is connected with semicoke outlet, the hot gas
Outlet is connected with first hot-wind inlet and second hot-wind inlet respectively.Inventor has found, by by classification and sorting skill
Art is coupled with classification dry technology, low-order coal is crushed in advance, classification is sorted and dried respectively again after handling, and improves low order
The efficiency of separation of coal, can significantly reduce and load is handled in subsequent process, and significantly reduce the generation of haze in processing procedure, together
Shi Caiyong dense media is sorted to screening gained lump coal and fine coal respectively, can significantly improve the sorting essence of lump coal and fine coal
Degree, so as to improve discharge refuse efficiency, and then is pyrolyzed energy consumption in reduction subsequent process, thus not only realizes and dries and discharge refuse one
Change, and the moisture on lump coal and fine coal surface can be removed by drying process, so as to reduce in assorting room between particle
The bonding probability of (especially between cleaned coal and spoil), solves existing combined type discharge refuse technology low to low-order coal rate of discharging refuse
Problem, and solve after pyrolysis semicoke calorific value is low, high ash content and the problem of high sulphur content, that is, use the system of the present invention can be with
The quality of pyrolysis product in pyrolytic process is significantly improved, while by the way that place is dried before pyrolysis processing is carried out to low-order coal
Reason, can significantly improve hydrocarbon yield in pyrolytic process, ingenious secondly by by dense medium separation and pyrolytic technique organic integration
By the waste heat produced in pyrolytic process be used for lump coal dense medium separation and fine coal dense medium separation process, place can be significantly reduced
Reason process energy cost, after being crushed, be molded successively additionally by the cleaned coal for obtaining fine coal hot blast dense medium separation device
Resupply into pyrolysis installation and carry out pyrolysis processing, raw material availability can be significantly improved, and then reduce cost of material.
System below with reference to the processing low-order coal of Fig. 1-3 pairs of embodiment of the present invention is described in detail.According to the present invention
Embodiment, the system includes：Low-order coal breaker 100, low-order coal screening plant 200, lump coal hot blast dense medium separation dress
Put 300, fine coal hot blast dense medium separation device 400, cleaned coal breaker 500, shaped device 600, pyrolysis installation 700 and waste heat
Retracting device 800.
Embodiments in accordance with the present invention, low-order coal breaker 100 has low-order coal entrance 101 and broken coal export 102,
And suitable for carrying out break process to low-order coal, so as to obtain break up coal.Thus, it is possible to significantly improve low order in subsequent process
The efficiency of separation of coal.
According to one embodiment of present invention, the particle diameter of break up coal is not particularly restricted, and those skilled in the art can be with
Selected according to actual needs, according to a particular embodiment of the invention, the particle diameter of break up coal can be not higher than 80mm.Invention
People has found that the break up coal of the particle size range can be substantially better than the discharge refuse efficiency that other particle diameters improve subsequent process.In the step,
Specifically, carrying out break process to low-order coal, the break up coal that obtained particle diameter is not higher than 80mm is supplied into subsequent handling, and is obtained
To particle diameter continue to come back for crushing higher than 80mm break up coal, until particle diameter is not higher than 80mm.It should be noted that ability
Field technique personnel can be selected the breaker of use according to actual needs.
Embodiments in accordance with the present invention, low-order coal screening plant 200 has break up coal entrance 201, lump coal outlet 202 and powder
Coal export 203, break up coal entrance 201 is connected with broken coal export 102, and suitable for break up coal is carried out into screening process, so as to
To obtain lump coal and fine coal.Thus, before break up coal is carried out into discharge refuse processing, classification processing is carried out to break up coal in advance, can
To significantly reduce the processing load in subsequent process, and the generation of haze in subsequent process can be avoided.
According to one embodiment of present invention, the particle diameter of lump coal is not particularly restricted, and those skilled in the art can root
Selected according to being actually needed, according to a particular embodiment of the invention, the particle diameter of lump coal can be to be not less than 6mm, and fine coal
Particle diameter can be less than 6mm.Thus, by carrying out screening process to break up coal, and by larger grain in subsequent processes
The lump coal in footpath and fine coal compared with small particle are sorted respectively, can improve low-order coal while subsequent treatment load is reduced
Rate of discharging refuse, so as to significantly improve the quality of pyrolysis product.
Embodiments in accordance with the present invention, lump coal hot blast dense medium separation device 300 has lump coal entrance 301, the first hot blast
Entrance 302, the first solid dense media entrance 303, the first spoil export the outlet 305 of the 304, first cleaned coal and the first offgas outlet
306, lump coal entrance 301 is connected with lump coal outlet 202, and suitable for being carried out using the first hot blast and the first solid dense media to lump coal
Sorting and drying process, so as to respectively obtain the first spoil, the first cleaned coal and the first tail gas containing dust.Invention human hair
It is existing, as that will be sorted using dense media to lump coal obtained by screening, the sharpness of separation of lump coal can be significantly improved, so as to improve
Energy consumption is pyrolyzed in discharge refuse efficiency, and then reduction subsequent process, and not only realizes the integration of dry and discharge refuse, and by dry
Dry processing can remove the moisture on lump coal surface, so as to reduce in assorting room between particle (especially cleaned coal and spoil it
Between) bonding probability, solve the problem of existing combined type discharge refuse technology is low to low-order coal rate of discharging refuse, and solve pyrolysis
Rear semicoke calorific value is low, high ash content and the problem of high sulphur content, i.e., can be significantly improved using the system of the present invention in pyrolytic process
The quality of pyrolysis product.
According to one embodiment of present invention, the temperature of the first hot blast is not particularly restricted, and those skilled in the art can
To be selected according to actual needs, according to a particular embodiment of the invention, the temperature of the first hot blast can be 60~110 DEG C.
According to still a further embodiment, the fluidizing velocity of the first dense media is not particularly restricted, this area skill
Art personnel can be selected according to actual needs, according to a particular embodiment of the invention, and the fluidizing velocity of the first dense media can
Think 0.8~1.7m/s.Inventor has found, if the fluidizing velocity of the first dense media is too low so that solid dense media therein is not
Can fully it fluidize, the dense media axial distributions of solids density of formation is poor, so as to cause separating effect poor, and if the stream of the first dense media
Change speed too high, there is local bubbling and bubbles burst etc. so that the fluctuation of dense media bed density is larger, again result in sorting effect
Fruit is also poor.Thus, the fluidizing velocity of the first dense media of selection is the dense media bed for the formation that 0.8~1.7m/s can cause
Density Density distribution is preferable, so as to improve separating effect.
According to still another embodiment of the invention, the separating density of the first dense media is not particularly restricted, this area skill
Art personnel can be selected according to actual needs, according to a particular embodiment of the invention, and the separating density of the first dense media can
Think 1.3~1.9g/cm3.Inventor has found that, if the separating density of the first dense media is too low, part cleaned coal is brought into spoil
In, cause clean coal recovery to reduce, and if the separating density of the first dense media is too high, part spoil is brought into cleaned coal, equally
Cause discharge refuse effect poor.Thus, the separating density of the first dense media of selection is 1.3~1.9g/cm3Cleaned coal and spoil can be realized
Efficiently separate.
It should be noted that " the first dense media " herein refers to the gas formed by the first hot blast and the first solid dense media
Gu fluidizing agent.
In the step, specifically, the first solid dense media can use magnetite powder, magnetite powder and hot blast are mixed to form
Fluidizing agent, lump coal is in the fluidizing agent, and according to Archimedes principle, cleaned coal is realized after layering with spoil according to density variation
Separation.
Embodiments in accordance with the present invention, fine coal hot blast dense medium separation device 400 has fine coal entrance 401, the second hot blast
Entrance 402, the second solid dense media entrance 403, the second spoil export the outlet 405 of the 404, second cleaned coal and the second offgas outlet
406, fine coal entrance 401 is connected with fine coal outlet 203, and suitable for being carried out using the second hot blast and the second solid dense media to fine coal
Sorting and drying process, so as to respectively obtain the second spoil, the second cleaned coal and the second tail gas containing dust.Invention human hair
It is existing, screening gained lump coal and fine coal are sorted respectively by using dense media, point of lump coal and fine coal can be significantly improved
Precision is selected, so as to improve discharge refuse efficiency, and then energy consumption is pyrolyzed in reduction subsequent process, thus not only realizes and dry and discharge refuse one
Body, and can remove by drying process the moisture on lump coal and fine coal surface, thus reduce in assorting room particle it
Between bonding probability (especially between cleaned coal and spoil), solve existing combined type discharge refuse technology low to low-order coal rate of discharging refuse
The problem of, and solve after pyrolysis semicoke calorific value is low, high ash content and the problem of high sulphur content, i.e., can using the system of the present invention
To significantly improve the quality of pyrolysis product in pyrolytic process.
According to one embodiment of present invention, the temperature of the second hot blast is not particularly restricted, and those skilled in the art can
To be selected according to actual needs, according to a particular embodiment of the invention, the temperature of the second hot blast can be 60~110 DEG C.
According to still a further embodiment, the fluidizing velocity of the second dense media is not particularly restricted, this area skill
Art personnel can be selected according to actual needs, according to a particular embodiment of the invention, and the fluidizing velocity of the second dense media can
Think 0.7~1.6m/s.Inventor has found, if the fluidizing velocity of the second dense media is too low so that solid dense media therein is not
Can fully it fluidize, the dense media axial distributions of solids density of formation is poor, so as to cause separating effect poor, and if the stream of the second dense media
Change speed too high, there is local bubbling and bubbles burst etc. so that the fluctuation of dense media bed density is larger, again result in sorting effect
Fruit is also poor.Thus, the fluidizing velocity of the second dense media of selection is the dense media bed for the formation that 0.7~1.6m/s can cause
Density Density distribution is preferable, so as to improve separating effect.
According to still another embodiment of the invention, the separating density of the second dense media is not particularly restricted, this area skill
Art personnel can be selected according to actual needs, according to a particular embodiment of the invention, and the separating density of the second dense media can
Think 1.3~1.9g/cm3.Inventor has found that, if the separating density of the second dense media is too low, part cleaned coal is brought into spoil
In, cause clean coal recovery to reduce, and if the separating density of the second dense media is too high, part spoil is brought into cleaned coal, equally
Cause discharge refuse effect poor.Thus, the separating density of the second dense media of selection is 1.3~1.9g/cm3Cleaned coal and spoil can be realized
Efficiently separate.
It should be noted that " the second dense media " herein refers to the gas formed by the second hot blast and the second solid dense media
Gu fluidizing agent.
In the step, specifically, the second solid dense media can use magnetite powder, magnetite powder and hot blast are mixed to form
Fluidizing agent, fine coal is in the fluidizing agent, and according to Archimedes principle, cleaned coal is realized after layering with spoil according to density variation
Separation.
Embodiments in accordance with the present invention, cleaned coal breaker 500 has cleaned coal entrance 501 and powder outlet 502, and cleaned coal enters
Mouth 501 is connected with the second cleaned coal outlet 405, and suitable for the above-mentioned cleaned coal of gained second is carried out into break process, so as to obtain
Powder.Thus, by carrying out resulting the second cleaned coal to be broken into the smaller powder of particle diameter, then by the powder through it is follow-up into
Pelletizing is made in type processing procedure, so as to significantly improve the utilization rate of cleaned coal raw material, and then reduces cost of material.
Embodiments in accordance with the present invention, the particle diameter of powder is not particularly restricted, and those skilled in the art can be according to reality
Border needs to be selected, according to a particular embodiment of the invention, and the particle diameter of powder can be not higher than 3mm.
Embodiments in accordance with the present invention, shaped device 600 has powder entrance 601 and pelletizing outlet 602, powder entrance
601 are connected with powder outlet 502, and suitable for broken gained powder is carried out into forming processes, so as to obtain pelletizing.Thus,
The utilization rate of cleaned coal raw material can be significantly improved, so as to further reduce cost of material.
Embodiments in accordance with the present invention, pyrolysis installation 700 has feeding mouth 701, semicoke outlet 702 and pyrolysis oil gas vent
703, feeding mouth 701 is connected with the first cleaned coal outlet 305 and pelletizing outlet 602, and suitable for the first cleaned coal and pelletizing are carried out into heat
Solution processing, so as to obtain semicoke and pyrolysis oil gas.Inventor has found, by by lump coal dense medium separation, fine coal dense media
Sorting and pyrolytic technique organic integration so that be dried and sorting process before pyrolysis processing is carried out to low-order coal, not only
Pyrolysis product quality can be significantly improved, and hydrocarbon yield in pyrolytic process can be significantly improved.
According to one embodiment of present invention, the temperature of pyrolysis processing is not particularly restricted, and those skilled in the art can
To be selected according to actual needs, according to a particular embodiment of the invention, the temperature of pyrolysis processing can be 500~700 DEG C.
Embodiments in accordance with the present invention, waste-heat recovery device 800 has semicoke entrance 801, cooling semicoke outlet 802 and heat
Gas outlet 803, semicoke entrance 801 and semicoke export 702 and are connected, heat outlet 803 respectively with the first hot-wind inlet 302 and the
Two hot-wind inlets 402 are connected, and carry out waste heat recovery processing suitable for the semicoke that is obtained to pyrolytic process, and by a part for hot gas
Return and used in lump coal hot blast dense medium separation device as the first hot blast, another part of hot gas is returned into fine coal hot blast dense medium
Matter sorting unit is used as the second hot blast.Inventor has found, by by discharge refuse technology and pyrolytic technique organic integration, cleverly
The waste heat produced in pyrolytic process is used for discharge refuse process, processing procedure energy cost can be significantly reduced.
In the step, specifically, carrying out waste heat recovery, half to the semicoke obtained in pyrolytic process using waste-heat recovery device
Burnt waste heat can obtain hot gas in waste-heat recovery device by conversion, and the temperature for controlling hot gas is 60~110 DEG C, and institute
Obtained hot gas is respectively fed to lump coal hot blast dense medium separation device and fine coal hot blast dense media point again after voltage stabilizing bag voltage stabilizing
Used in screening device as hot blast.
The system of processing low-order coal according to embodiments of the present invention by by classification and sorting technology with being classified dry technology coupling
Close, low-order coal is crushed in advance, is sorted and is dried respectively again after classification processing, the efficiency of separation of raising low-order coal can be with
Significantly reduce and load is handled in subsequent process, and significantly reduce the generation of haze in processing procedure, while being distinguished using dense media
Screening gained lump coal and fine coal are sorted, the sharpness of separation of lump coal and fine coal can be significantly improved, so as to improve discharge refuse effect
Energy consumption is pyrolyzed in rate, and then reduction subsequent process, thus not only realizes and dries and discharge refuse integration, and pass through drying process
The moisture on lump coal and fine coal surface can be removed, so as to reduce in assorting room between particle (especially cleaned coal and spoil it
Between) bonding probability, solve the problem of existing combined type discharge refuse technology is low to low-order coal rate of discharging refuse, and solve heat
Semicoke calorific value after solution is low, high ash content and the problem of high sulphur content, i.e., can significantly improve pyrolytic process using the system of the present invention
The quality of middle pyrolysis product, while by the way that processing is dried before pyrolysis processing is carried out to low-order coal, can significantly improve
Hydrocarbon yield in pyrolytic process, secondly by by dense medium separation and pyrolytic technique organic integration, cleverly by pyrolytic process
The waste heat of generation be used for lump coal dense medium separation and fine coal dense medium separation process, can significantly reduce the processing procedure energy into
This, resupplies to pyrolysis after being crushed, be molded successively additionally by the cleaned coal for obtaining fine coal hot blast dense medium separation device
Pyrolysis processing is carried out in device, raw material availability can be significantly improved, and then reduce cost of material.
With reference to Fig. 2, the system of processing low-order coal according to embodiments of the present invention further comprises：Cleaned coal screening plant 900.
Embodiments in accordance with the present invention, cleaned coal screening plant 900 is with cleaned coal outlet 902 on the first cleaned coal entrance 901, sieve
With the lower cleaned coal outlet 903 of sieve, the first cleaned coal entrance 901 is connected with the first cleaned coal outlet 305, cleaned coal outlet 902 and pan feeding on sieve
Mouth 701 is connected, and the lower cleaned coal outlet 903 of sieve is connected with cleaned coal entrance 501, and is suitable to supply into pyrolysis installation by the first cleaned coal
Carry out before pyrolysis processing, the first cleaned coal is supplied screening process is carried out into cleaned coal screening plant in advance, so as to obtain
Cleaned coal and the lower cleaned coal of sieve on sieve, and the upper cleaned coal of sieve is supplied to pyrolysis installation, the lower cleaned coal of sieve is supplied to cleaned coal breaker.By
This, can reduce the generation of haze, so as to save cost of material while the waste of follow-up pyrolytic process cleaned coal is avoided.
According to one embodiment of present invention, the particle diameter of cleaned coal is not particularly restricted on sieve, and those skilled in the art can
To be selected according to actual needs, according to a particular embodiment of the invention, the particle diameter of cleaned coal can be not higher than 10mm on sieve,
And the particle diameter for sieving lower cleaned coal can be less than 10mm.Thus, screening process is carried out as the cleaned coal to obtained by, by the essence of greater particle size
Coal is supplied to follow-up pyrolytic process, and will carry out pyrolysis processing again after follow-up crushing shaping compared with the cleaned coal of small particle, so as to
To avoid the waste of cleaned coal in pyrolytic process, and then raw material availability can be improved.
With reference to Fig. 3, the system of processing low-order coal according to embodiments of the present invention further comprises：Dust arrester 1000.
There is embodiments in accordance with the present invention, dust arrester 1000 gas inlet 1001, gas vent 1002 and dust to go out
Mouth 1003, gas inlet 1001 is connected with the first offgas outlet 306 and the second offgas outlet 406, dust outlet 1003 and powder
Entrance 601 is connected, and suitable for supplying to enter into dust arrester the first tail gas containing dust and the second tail gas containing dust
Row dust removal process, to collect dust, and returns to shaped device and powder progress forming processes by dust.Thus, dedusting is passed through
Processing, can isolate the dust taken out of in tail gas, so as to avoid the waste of material, and then further reduce cost of material.
As described above, the system of processing low-order coal according to embodiments of the present invention can have the advantages that to be selected from it is following at least it
One：
The system of processing low-order coal according to embodiments of the present invention by the way that fine coal and lump coal are respectively adopted into dense medium separation,
So that the sharpness of separation and dehydration rate of lump coal and fine coal are all higher, so that the coal impurity for entering pyrolysis oven is few, and then to be somebody's turn to do
System has the advantages that energy consumption is low, treating capacity is big, and avoids direct " extensive " present situation of low-order coal (lignite), reduces
Environmental pollution.
The system of processing low-order coal according to embodiments of the present invention by raw coal is carried out before pyrolysis dense medium separation with
Drying process, can provide the industrial chemicals of high-quality for subsequent job, and part high price high-quality is replaced with cheap low-order coal (lignite)
Bituminous coal and anthracite, a kind of effective way is provided for efficient utilize of low-order coal (lignite) resource.
In another aspect of the invention, the present invention proposes a kind of method for handling low-order coal.According to the reality of the present invention
Example is applied, this method is carried out using the system of the processing low-order coal of foregoing description.According to a particular embodiment of the invention, (1)
The low-order coal is supplied and carries out break process into the low-order coal breaker, to obtain break up coal；(2) will be described broken
Broken coal is supplied carries out screening process into the low-order coal screening plant, to obtain lump coal and fine coal；(3) lump coal is supplied
The lump coal is divided using the first hot blast and the first solid dense media into the lump coal hot blast dense medium separation device
Choosing and drying process, to respectively obtain the first spoil, the first cleaned coal and the first tail gas containing dust；(4) by the fine coal
Supply is carried out into the fine coal hot blast dense medium separation device using the second hot blast and the second solid dense media to the fine coal
Sorting and drying process, to respectively obtain the second spoil, the second cleaned coal and the second tail gas containing dust；(5) by described
Two cleaned coal are supplied carries out break process into the cleaned coal breaker, to obtain powder；(6) powder is supplied to institute
State and forming processes are carried out in shaped device, to obtain pelletizing；(7) first cleaned coal and the pelletizing are supplied to the heat
Pyrolysis processing is carried out in solution device, to obtain semicoke and pyrolysis oil gas；And the semicoke is supplied to the waste heat and returned by (8)
Receiving apparatus carries out waste heat recovery processing, to obtain cooling semicoke and hot gas, and by a part of return to step (3) of the hot gas
Used as first hot blast, another part return to step (4) of the hot gas is used as second hot blast.Invention
People has found, by the way that classification and sorting technology is coupled with classification dry technology, low-order coal is crushed in advance, classification is distinguished again after handling
Sorted and dried, improved the efficiency of separation of low-order coal, can significantly reduce and load is handled in subsequent process, and significantly reduce
The generation of haze in processing procedure, while screening gained lump coal and fine coal are sorted respectively using dense media, can be notable
The sharpness of separation of lump coal and fine coal is improved, so as to improve discharge refuse efficiency, and then energy consumption is pyrolyzed in reduction subsequent process, thus not only
Realize and dry and discharge refuse integration, and the moisture on lump coal and fine coal surface can be removed by drying process, so as to reduce
Bonding probability in assorting room between particle (especially between cleaned coal and spoil), solves existing combined type discharge refuse skill
The problem of art is low to low-order coal rate of discharging refuse, and solve after pyrolysis semicoke calorific value is low, high ash content and the problem of high sulphur content, i.e.,
The quality of pyrolysis product in pyrolytic process can be significantly improved using the method for the present invention, while by carrying out heat to low-order coal
Solution processing before processing is dried, hydrocarbon yield in pyrolytic process can be significantly improved, secondly by by dense medium separation with
Pyrolytic technique organic integration, is cleverly used for lump coal dense medium separation and fine coal dense media point by the waste heat produced in pyrolytic process
Process is selected, processing procedure energy cost can be significantly reduced, additionally by the essence for obtaining fine coal hot blast dense medium separation device
Coal crushed successively, be molded after resupply into pyrolysis installation and carry out pyrolysis processing, raw material availability can be significantly improved, entered
And reduce cost of material.It should be noted that the feature and advantage described by the above-mentioned system for processing low-order coal are equally fitted
For the method for the processing low-order coal, here is omitted.
Method below with reference to the processing low-order coal of Fig. 4-6 pairs of embodiment of the present invention is described in detail.According to the present invention
Embodiment, this method includes：
S100：Low-order coal is supplied break process is carried out into low-order coal breaker
Embodiments in accordance with the present invention, the low-order coal is supplied into the low-order coal breaker and carries out broken place
Reason, so as to obtain break up coal.Thus, it is possible to significantly improve the efficiency of separation of low-order coal in subsequent process.
According to one embodiment of present invention, the particle diameter of break up coal is not particularly restricted, and those skilled in the art can be with
Selected according to actual needs, according to a particular embodiment of the invention, the particle diameter of break up coal can be not higher than 80mm.Invention
People has found that the break up coal of the particle size range can be substantially better than the discharge refuse efficiency that other particle diameters improve subsequent process.In the step,
Specifically, carrying out break process to low-order coal, the break up coal that obtained particle diameter is not higher than 80mm is supplied into subsequent handling, and is obtained
To particle diameter continue to come back for crushing higher than 80mm break up coal, until particle diameter is not higher than 80mm.It should be noted that ability
Field technique personnel can be selected the low-order coal breaker of use according to actual needs.
S200：Break up coal is supplied screening process is carried out into low-order coal screening plant
Embodiments in accordance with the present invention, above-mentioned gained break up coal is supplied into low-order coal screening plant and carried out at screening
Reason, so as to obtain lump coal and fine coal.Thus, before break up coal is carried out into discharge refuse processing, break up coal is divided in advance
Level processing, can significantly reduce the processing load in subsequent process, and can avoid the generation of haze in subsequent process.
According to one embodiment of present invention, the particle diameter of lump coal is not particularly restricted, and those skilled in the art can root
Selected according to being actually needed, according to a particular embodiment of the invention, the particle diameter of lump coal can be to be not less than 6mm, and fine coal
Particle diameter can be less than 6mm.Thus, by carrying out screening process to break up coal, and by larger grain in subsequent processes
The lump coal in footpath and fine coal compared with small particle are sorted respectively, can improve low-order coal while subsequent treatment load is reduced
Rate of discharging refuse, so as to significantly improve the quality of pyrolysis product.
S300：Lump coal is supplied into lump coal hot blast dense medium separation device using the first hot blast and the first solid dense media
Lump coal is sorted and drying process
Embodiments in accordance with the present invention, lump coal obtained by above-mentioned screening step is supplied to lump coal hot blast dense medium separation device
It is middle lump coal to be sorted and drying process using the first hot blast and the first solid dense media, so as to respectively obtain the first cash
Stone, the first cleaned coal and the first tail gas containing dust.Inventor has found, as that will be carried out using dense media to lump coal obtained by screening
Sorting, can significantly improve the sharpness of separation of lump coal, so as to improve discharge refuse efficiency, and then be pyrolyzed energy consumption in reduction subsequent process,
And not only realize and dry and discharge refuse integration, and the moisture on lump coal surface can be removed by drying process, so as to drop
Bonding probability in low assorting room between particle (especially between cleaned coal and spoil), solves existing combined type discharge refuse
The problem of technology is low to low-order coal rate of discharging refuse, and solve after pyrolysis semicoke calorific value is low, high ash content and the problem of high sulphur content,
The quality of pyrolysis product in pyrolytic process can be significantly improved using the present invention.
According to one embodiment of present invention, the temperature of the first hot blast is not particularly restricted, and those skilled in the art can
To be selected according to actual needs, according to a particular embodiment of the invention, the temperature of the first hot blast can be 60~110 DEG C.
According to still a further embodiment, the fluidizing velocity of the first dense media is not particularly restricted, this area skill
Art personnel can be selected according to actual needs, according to a particular embodiment of the invention, and the fluidizing velocity of the first dense media can
Think 0.8~1.7m/s.Inventor has found, if the fluidizing velocity of the first dense media is too low so that solid dense media therein is not
Can fully it fluidize, the dense media axial distributions of solids density of formation is poor, so as to cause separating effect poor, and if the stream of the first dense media
Change speed too high, there is local bubbling and bubbles burst etc. so that the fluctuation of dense media bed density is larger, again result in sorting effect
Fruit is also poor.Thus, the fluidizing velocity of the first dense media of selection is the dense media bed for the formation that 0.8~1.7m/s can cause
Density Density distribution is preferable, so as to improve separating effect.
According to still another embodiment of the invention, the separating density of the first dense media is not particularly restricted, this area skill
Art personnel can be selected according to actual needs, according to a particular embodiment of the invention, and the separating density of the first dense media can
Think 1.3~1.9g/cm3.Inventor has found that, if the separating density of the first dense media is too low, part cleaned coal is brought into spoil
In, cause clean coal recovery to reduce, and if the separating density of the first dense media is too high, part spoil is brought into cleaned coal, equally
Cause discharge refuse effect poor.Thus, the separating density of the first dense media of selection is 1.3~1.9g/cm3Cleaned coal and spoil can be realized
Efficiently separate.
It should be noted that " the first dense media " herein refers to the gas formed by the first hot blast and the first solid dense media
Gu fluidizing agent.
In the step, specifically, the first solid dense media can use magnetite powder, magnetite powder and hot blast are mixed to form
Fluidizing agent, lump coal is in the fluidizing agent, and according to Archimedes principle, cleaned coal is realized after layering with spoil according to density variation
Separation.
S400：Fine coal is supplied into fine coal hot blast dense medium separation device using the second hot blast and the second solid dense media
Fine coal is sorted and drying process
Embodiments in accordance with the present invention, fine coal is supplied into fine coal hot blast dense medium separation device using the second hot blast and
Second solid dense media is sorted and drying process to fine coal, so as to respectively obtain the second spoil, the second cleaned coal and contain
There is the second tail gas of dust.Inventor is had found, screening gained lump coal and fine coal are sorted respectively by using dense media, can
To significantly improve the sharpness of separation of lump coal and fine coal, so as to improve discharge refuse efficiency, and then energy consumption is pyrolyzed in reduction subsequent process, by
This, which is not only realized, dries and discharge refuse integration, and can remove the moisture on lump coal and fine coal surface by drying process, from
And the bonding probability in assorting room between particle (especially between cleaned coal and spoil) is reduced, solve existing combined type
The problem of discharge refuse technology is low to low-order coal rate of discharging refuse, and solve pyrolysis after semicoke calorific value it is low, ash content is high and sulphur content is high
Problem, i.e., can significantly improve the quality of pyrolysis product in pyrolytic process using the system of the present invention.
According to one embodiment of present invention, the temperature of the second hot blast is not particularly restricted, and those skilled in the art can
To be selected according to actual needs, according to a particular embodiment of the invention, the temperature of the second hot blast can be 60~110 DEG C.
According to still a further embodiment, the fluidizing velocity of the second dense media is not particularly restricted, this area skill
Art personnel can be selected according to actual needs, according to a particular embodiment of the invention, and the fluidizing velocity of the second dense media can
Think 0.7~1.6m/s.Inventor has found, if the fluidizing velocity of the second dense media is too low so that solid dense media therein is not
Can fully it fluidize, the dense media axial distributions of solids density of formation is poor, so as to cause separating effect poor, and if the stream of the second dense media
Change speed too high, there is local bubbling and bubbles burst etc. so that the fluctuation of dense media bed density is larger, again result in sorting effect
Fruit is also poor.Thus, the fluidizing velocity of the second dense media of selection is the dense media bed for the formation that 0.7~1.6m/s can cause
Density Density distribution is preferable, so as to improve separating effect.
According to still another embodiment of the invention, the separating density of the second dense media is not particularly restricted, this area skill
Art personnel can be selected according to actual needs, according to a particular embodiment of the invention, and the separating density of the second dense media can
Think 1.3~1.9g/cm3.Inventor has found that, if the separating density of the second dense media is too low, part cleaned coal is brought into spoil
In, cause clean coal recovery to reduce, and if the separating density of the second dense media is too high, part spoil is brought into cleaned coal, equally
Cause discharge refuse effect poor.Thus, the separating density of the second dense media of selection is 1.3~1.9g/cm3Cleaned coal and spoil can be realized
Efficiently separate.
It should be noted that " the second dense media " herein refers to the gas formed by the second hot blast and the second solid dense media
Gu fluidizing agent.
In the step, specifically, the second solid dense media can use magnetite powder, magnetite powder and hot blast are mixed to form
Fluidizing agent, fine coal is in the fluidizing agent, and according to Archimedes principle, cleaned coal is realized after layering with spoil according to density variation
Separation.
S500：Second cleaned coal is supplied break process is carried out into cleaned coal breaker
Embodiments in accordance with the present invention, the above-mentioned cleaned coal of gained second is supplied into cleaned coal breaker and carries out broken place
Reason, so as to obtain powder.Thus, by carrying out the second resulting cleaned coal to be broken into the smaller powder of particle diameter, then
Pelletizing is made through subsequent forming processing procedure in the powder, so as to significantly improve the utilization rate of cleaned coal raw material, and then is reduced
Cost of material.
Embodiments in accordance with the present invention, the particle diameter of powder is not particularly restricted, and those skilled in the art can be according to reality
Border needs to be selected, according to a particular embodiment of the invention, and the particle diameter of powder can be not higher than 3mm.
S600：Powder is supplied into shaped device and carries out forming processes
Embodiments in accordance with the present invention, carry out forming processes, so as to obtain pelletizing by broken gained powder.Thus,
The utilization rate of cleaned coal raw material can be significantly improved, so as to further reduce cost of material.
S700：First cleaned coal and pelletizing are supplied into pyrolysis installation and carry out pyrolysis processing
Embodiments in accordance with the present invention, pelletizing obtained by the first cleaned coal obtained by S300 and S600 is supplied to enter into pyrolysis installation
Row pyrolysis processing, so as to obtain semicoke and pyrolysis oil gas.Inventor has found, by by dense medium separation, fine coal dense media
Sorting and pyrolytic technique organic integration so that be dried and sorting process before pyrolysis processing is carried out to low-order coal, not only
Pyrolysis product quality can be significantly improved, and hydrocarbon yield in pyrolytic process can be significantly improved.
According to one embodiment of present invention, the temperature of pyrolysis processing is not particularly restricted, and those skilled in the art can
To be selected according to actual needs, according to a particular embodiment of the invention, the temperature of pyrolysis processing can be 500~700 DEG C.
S800：Semicoke is supplied to waste-heat recovery device and carries out waste heat recovery processing, and a part for hot gas is returned into step
Rapid S300 is used as the first hot blast, and another part return to step S400 of hot gas is used as the second hot blast
Embodiments in accordance with the present invention, semicoke obtained by pyrolytic process is supplied to waste-heat recovery device and carried out at waste heat recovery
Reason, so as to obtain cooling semicoke and hot gas, and a part of return to step S300 of hot gas is used as the first hot blast, will
Another part return to step S400 of hot gas is used as the second hot blast.Inventor find, by by discharge refuse technology and pyrolysis skill
Art organic integration, is cleverly used for discharge refuse process by the waste heat produced in pyrolytic process, can significantly reduce the processing procedure energy
Cost.
In the step, specifically, carrying out waste heat recovery, half to the semicoke obtained in pyrolytic process using waste-heat recovery device
Burnt waste heat can obtain hot gas in waste-heat recovery device by conversion, and the temperature for controlling hot gas is 90~120 DEG C, and institute
Obtained hot gas is respectively fed to lump coal hot blast dense medium separation device and fine coal hot blast dense media point again after voltage stabilizing bag voltage stabilizing
Used in screening device as hot blast.
By the way that classification and sorting technology is coupled with classification dry technology, low-order coal is crushed in advance, classification divides again after handling
Do not sorted and dried, improved the efficiency of separation of low-order coal, can significantly reduce and load is handled in subsequent process, and significantly drop
The generation of haze during reduction process, while being sorted respectively to screening gained lump coal and fine coal using dense media, Ke Yixian
The sharpness of separation for improving lump coal and fine coal is write, so as to improve discharge refuse efficiency, and then energy consumption is pyrolyzed in reduction subsequent process, thus not
But realize and dry and discharge refuse integration, and the moisture on lump coal and fine coal surface can be removed by drying process, so as to drop
Bonding probability in low assorting room between particle (especially between cleaned coal and spoil), solves existing combined type discharge refuse
The problem of technology is low to low-order coal rate of discharging refuse, and solve after pyrolysis semicoke calorific value is low, high ash content and the problem of high sulphur content,
The quality of pyrolysis product in pyrolytic process can be significantly improved using the method for the present invention, while by being carried out to low-order coal
Processing is dried before pyrolysis processing, hydrocarbon yield in pyrolytic process can be significantly improved, secondly by by dense medium separation
With pyrolytic technique organic integration, the waste heat produced in pyrolytic process is cleverly used for lump coal dense medium separation and fine coal dense media
Assorting room, can significantly reduce processing procedure energy cost, additionally by obtain fine coal hot blast dense medium separation device
Cleaned coal crushed successively, be molded after resupply into pyrolysis installation and carry out pyrolysis processing, raw material availability can be significantly improved,
And then reduce cost of material.
With reference to Fig. 5, the method for processing low-order coal according to embodiments of the present invention further comprises：
S900：Before the first cleaned coal to be supplied into pyrolysis installation to progress pyrolysis processing, the first cleaned coal is supplied in advance
Screening process is carried out into cleaned coal screening plant, and the upper cleaned coal of sieve is supplied to step S700, the lower cleaned coal of sieve is supplied to step
S500
Embodiments in accordance with the present invention, before the first cleaned coal to be supplied into pyrolysis installation to progress pyrolysis processing, in advance
First cleaned coal is supplied screening process is carried out into cleaned coal screening plant, so as to obtain sieving upper cleaned coal and the lower cleaned coal of sieve, and
The upper cleaned coal of sieve is supplied to step S700, the lower cleaned coal of sieve is supplied to step S500.Thus, it is possible to avoid follow-up pyrolytic process
The generation of haze is reduced while the waste of cleaned coal, so as to save cost of material.
According to one embodiment of present invention, the particle diameter of cleaned coal is not particularly restricted on sieve, and those skilled in the art can
To be selected according to actual needs, according to a particular embodiment of the invention, the particle diameter of cleaned coal can be not higher than 10mm on sieve,
And the particle diameter for sieving lower cleaned coal can be less than 10mm.Thus, screening process is carried out as the cleaned coal to obtained by, by the essence of greater particle size
Coal is supplied to follow-up pyrolytic process, and will carry out pyrolysis processing again after follow-up crushing shaping compared with the cleaned coal of small particle, so as to
To avoid the waste of cleaned coal in pyrolytic process, and then raw material availability can be improved.
With reference to Fig. 6, the method for processing low-order coal according to embodiments of the present invention further comprises：
S1000：The first tail gas containing dust and the second tail gas containing dust are supplied and removed into dust arrester
Dirt processing, and by dust return to step S600
Embodiments in accordance with the present invention, the first tail gas containing dust and the second tail gas containing dust are supplied to dedusting
Dust removal process is carried out in device, so as to collect dust, and dust return to step S600 and powder are carried out at the shaping
Reason.Thus, by dust removal process, the dust taken out of in tail gas can be isolated, so that the waste of material is avoided, and then further
Reduce cost of material.
Below with reference to specific embodiment, present invention is described, it is necessary to which explanation, these embodiments are only description
Property, without limiting the present invention in any way.
Embodiment
Lignite raw coal is handled using the system of the processing low-order coal shown in Fig. 7, the raw coal treating capacity of the present embodiment
For 500,000 tons/year, raw coal moisture as received coal 28.55%, embodiment includes the processing step of following sequence：
1), raw coal enters low-order coal breaker by run coal bin first, and it is 80mm's to be then given to aperture by feeder
Sieved on sieve, break up coal of the particle diameter higher than 80mm feeds low-order coal breaker by Belt Conveying and feeder to be continued
Break process is carried out, untill granularity is less than 80mm, gained particle diameter is then not higher than 80mm break up coal again by low order
Screen separating device (sieve aperture is 6mm), obtains lump coal ((particle diameter is not less than 6mm) and fine coal (particle diameter is less than 6mm)；
2) gained lump coal, is fed into lump coal hot blast dense medium separation device by belt, hot blast enters lump coal heat from bottom
Wind dense medium separation device, hot blast temperature is 90 DEG C, and dense media fluidizing velocity is 1.15m/s, separating density 1.68g/cm3, cash
Stone carries the first tail gas of dust secretly from lump coal hot blast dense medium separation from the discharge refuse mouthful discharge of lump coal hot blast dense medium separation device
The outlet of the dust excluding hood of device enters dust arrester, and the first cleaned coal is arranged from the cleaned coal outlet of lump coal hot blast dense medium separation device
Go out, and enter cleaned coal screening plant, the upper cleaned coal (particle diameter is not less than 10mm) of sieve and the lower essence of sieve are screened into by sieve classification
Coal (particle diameter is less than 10mm) two parts, wherein, cleaned coal enters pyrolysis installation on sieve, and sieves lower cleaned coal and enter cleaned coal breaker quilt
It is broken for powder (low particle diameter is 3mm)；
3), gained fine coal feeds fine coal hot blast dense medium separation device by belt, and hot blast enters fine coal hot blast from bottom
Dense medium separation device, hot blast temperature is 90 DEG C, and dense media fluidizing velocity is 1.03m/s, separating density 1.65g/cm3, entrainment
The outlet of second tail gas of dust from the dust excluding hood of fine coal hot blast dense medium separation device enters dust arrester, fine coal hot blast dense medium
Powder cleaned coal, powder spoil product are obtained after the sorting of matter sorting unit, powder cleaned coal is crushed into powder (particle diameter into cleaned coal breaker
Low is 3mm)；
4) dust 2) collected with 3) powder and dust arrester, is fed into mixer together, and added into mixer
A certain proportion of binding agent, water and catalyst (or being not added with catalyst) are mixed, and are carried out coal powder formation by mixing, are obtained ball
Group；
5), the pelletizing produced by the first cleaned coal 2) produced and 4) feeds pyrolysis installation respectively, passes through 550 DEG C of Low Temperature Thermal
The processing such as solution, quenching, oil/gas dedusting, oil/gas cooling and oil/water separation, obtain semicoke, tar and pyrolysis gas；
6), the waste heat for producing pyrolysis installation is reclaimed by waste-heat recovery device row, and lump coal is used as after voltage stabilizing bag voltage stabilizing
The drying of hot blast dense medium separation device and fine coal hot blast dense medium separation device and gas fluidizing agent, at the same be dried and
Sorting, realizes the high-efficiency comprehensive utilization of the energy.When just starting working lump coal hot blast dense medium separation device is used as with outer hot wind supply
Drying and gas fluidizing agent with fine coal hot blast dense medium separation device.
Comparative example
1), lignite raw coal carries out cleaned coal (particle diameter on sieve classification device, sieve by run coal bin by Belt Conveying and feeder
It is not less than 10mm) and lower cleaned coal (particle diameter the is less than 10mm) two parts of sieve, wherein, cleaned coal is directly entered pyrolysis installation on sieve, and sieves
Lower cleaned coal is crushed into fine coal into breaker (particle diameter is less than 3mm)；
2), the powder cleaned coal 1) produced is molded, cleaned coal pelletizing is obtained；
3), cleaned coal and the cleaned coal pelletizing 2) produced feed pyrolysis installation respectively on the sieve that will 1) produce, and pass through 550 DEG C of heat
The processing such as solution, quenching, oil/gas dedusting, oil/gas cooling and oil/water separation, obtain semicoke, tar and pyrolysis gas.
The yield results that handling process through embodiment and comparative example is obtained are as shown in table 1.
The embodiment of table 1 and each material yield contrast of comparative example
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the not be the same as Example or the feature of example and non-be the same as Example or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (9)
1. a kind of method that system using processing low-order coal handles low-order coal, it is characterised in that including：
The system of the processing low-order coal, it includes：
Low-order coal breaker, the low-order coal breaker has low-order coal entrance and broken coal export；
Low-order coal screening plant, the low-order coal screening plant has break up coal entrance, lump coal outlet and fine coal outlet；
There is lump coal hot blast dense medium separation device, the lump coal hot blast dense medium separation device lump coal entrance, the first hot blast to enter
Mouth, the first solid dense media entrance, the first spoil outlet, the first cleaned coal outlet and the first offgas outlet, the lump coal entrance with
The lump coal outlet is connected；
There is fine coal hot blast dense medium separation device, the fine coal hot blast dense medium separation device fine coal entrance, the second hot blast to enter
Mouth, the second solid dense media entrance, the second spoil outlet, the second cleaned coal outlet and the second offgas outlet, the fine coal entrance with
The fine coal outlet is connected；
Cleaned coal breaker, the cleaned coal breaker has cleaned coal entrance and a powder outlet, the cleaned coal entrance and described the
The outlet of two cleaned coal is connected；
Shaped device, the shaped device has powder entrance and pelletizing outlet, the powder entrance and the powder outlet phase
Even；
Pyrolysis installation, the pyrolysis installation has feeding mouth, semicoke outlet and pyrolysis oil gas vent, the feeding mouth and described the
One cleaned coal is exported to be connected with pelletizing outlet；And
Waste-heat recovery device, the waste-heat recovery device has semicoke entrance, the outlet of cooling semicoke and heat outlet, the semicoke
The outlet of entrance and the semicoke is connected, the heat outlet respectively with first hot-wind inlet and the second hot-wind inlet phase
Even,
Implemented the steps of using said system：
(1) low-order coal is supplied and carries out break process into the low-order coal breaker, to obtain break up coal；
(2) break up coal is supplied and carries out screening process into the low-order coal screening plant, to obtain lump coal and fine coal；
(3) lump coal is supplied into the lump coal hot blast dense medium separation device using the first hot blast and the first solid dense medium
The lump coal of verifying is sorted and drying process, so as to respectively obtain the first spoil, the first cleaned coal and containing dust first
Tail gas；
(4) fine coal is supplied into the fine coal hot blast dense medium separation device using the second hot blast and the second solid dense medium
The fine coal of verifying is sorted and drying process, so as to respectively obtain the second spoil, the second cleaned coal and containing dust second
Tail gas；
(5) second cleaned coal is supplied and carries out break process into the cleaned coal breaker, to obtain powder；
(6) powder is supplied and forming processes is carried out into the shaped device, to obtain pelletizing；
(7) first cleaned coal and the pelletizing are supplied and pyrolysis processing is carried out into the pyrolysis installation, to obtain semicoke
With pyrolysis oil gas；And
(8) semicoke is supplied to the waste-heat recovery device and carries out waste heat recovery processing, to obtain cooling semicoke and heat
Gas, and a part of return to step (3) of the hot gas is used as first hot blast, another part of the hot gas is returned
Step (4) is returned to use as second hot blast.
2. according to the method described in claim 1, it is characterised in that the system further comprises：
Cleaned coal screening plant, the cleaned coal screening plant is exported with cleaned coal outlet on the first cleaned coal entrance, sieve and the lower cleaned coal of sieve,
The first cleaned coal entrance is connected with first cleaned coal outlet, and cleaned coal outlet is connected with the feeding mouth on the sieve, described
The lower cleaned coal outlet of sieve is connected with the cleaned coal entrance.
3. method according to claim 1 or 2, it is characterised in that the system further comprises：
Dust arrester, the dust arrester has gas inlet, gas vent and a dust outlet, the gas inlet and described the
One offgas outlet is connected with second offgas outlet, and the dust outlet is connected with the powder entrance.
4. method according to claim 2, it is characterised in that further comprise：
(9) before first cleaned coal to be supplied into the pyrolysis installation to progress pyrolysis processing, in advance by the described first essence
Coal is supplied carries out screening process into the cleaned coal screening plant, to obtain sieving upper cleaned coal and the lower cleaned coal of sieve, and by the sieve
Upper cleaned coal is supplied to the pyrolysis installation, and cleaned coal under the sieve is supplied to the cleaned coal breaker.
5. method according to claim 3, it is characterised in that further comprise：
(10) first tail gas containing dust and second tail gas containing dust are supplied into the dust arrester
Dust removal process is carried out, to collect dust, and the dust return to step (6) and the powder forming processes are subjected to.
6. according to the method described in claim 1, it is characterised in that in step (1), the particle diameter of the break up coal is not higher than
80mm。
7. according to the method described in claim 1, it is characterised in that in step (3), the temperature of first hot blast be 60~
110 degrees Celsius, the first dense media fluidizing velocity is 0.8~1.7m/s, and separating density is 1.3~1.9g/cm3,
Or, in step (4), the temperature of second hot blast is 60~110 degrees Celsius, and the second dense media fluidizing velocity is 0.7
~1.6m/s, separating density is 1.3~1.9g/cm3。
8. according to the method described in claim 1, it is characterised in that in step (2), the particle diameter of the lump coal is not less than 6mm,
Or, in step (9), the particle diameter of cleaned coal is not less than 10mm on the sieve.
9. according to the method described in claim 1, it is characterised in that in step (5), the particle diameter of the powder is not higher than 3mm.
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