CN205501220U - System for handle low order coal - Google Patents
System for handle low order coal Download PDFInfo
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- CN205501220U CN205501220U CN201620226940.7U CN201620226940U CN205501220U CN 205501220 U CN205501220 U CN 205501220U CN 201620226940 U CN201620226940 U CN 201620226940U CN 205501220 U CN205501220 U CN 205501220U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The utility model discloses a system for handle low order coal, include: grading plant, the hot -blast combined type sorting unit of lump coal, pyrolysis device, semicoke waste heat recovery device, powder coal drying unit and pulverized -coal gasification plant, the export of the last lump coal of grading plant is gone up the lump coal entry with the hot -blast combined type sorting unit of lump coal and is linked to each other, upward the clean coal export is continuous with the hot -blast combined type sorting unit of lump coal for the clean coal entry on the pyrolysis device, semi -coke outlet linked to each other on semicoke waste heat recovery device went up semi -coke outlet and pyrolysis device, and semicoke waste heat recovery device goes up the heat outlet and goes up hot -blast entry with the hot -blast combined type sorting unit of lump coal and link to each other, whitewashed coal drying unit goes up the fine coal entry, and upward the fine coal export is continuous with grading plant, the last dry fine coal of pulverized -coal gasification plant entry is gone up the export of dry fine coal with powder coal drying unit and is linked to each other. This system can solve the low problem of present low order coal discharge refuse rate, produces the semicoke waste heat with the pyrolysis and is used for the discharge refuse, has reduced the energy cost, gasifies fine coal simultaneously, has improved utilization ratio of material.
Description
Technical field
This utility model belongs to technical field of coal chemical industry, and specifically, this utility model relates 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 verifies more than the 55% of coal reserves.
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 prescription of multiple user, and low-order coal Efficient Development profit is processed in upgrading
Key.The upgrading processing of low-order coal include sorting, be dried, molding, be 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 room temperature, the surface moisture of coal makes the sticking probability between granule big, separating effect is poor.
Compared with low-order coal combustion power generation, low-order coal is directly dried, be pyrolyzed and gasification technology improves low-order coal to a certain extent
Utilization ratio, but the dirts such as ash in upgraded coal, sulfur affect the quality of following process product, and sulfur-bearing, nitrogen etc. are changed
Compound pollutes environment and equipment corrosion, reduces effective treating capacity of pyrolysis and gasification simultaneously.Therefore, exploitation is new
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 this 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 to propose a kind of system processing low-order coal, and this system can solve existing combined type discharge refuse technology pair
The problem that low-order coal rate of discharging refuse is low, such that it is able to improve quality and the productivity of pyrolysis product in subsequent thermal solution preocess, and passes through
The waste heat recovery produced in pyrolytic process is used for discharge refuse process, energy cost can be significantly reduced, simultaneously by being entered by fine coal
Row gasification process obtains the gas that gasifies, and is possible not only to significantly improve raw material availability, and can improve Business Economic Benefit.
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:
Grading plant, described grading plant has low-order coal entrance, lump coal outlet and fine coal outlet；
Lump coal hot blast combined type sorting unit, described lump coal hot blast combined type sorting unit have lump coal entrance, hot-wind inlet,
Spoil outlet, cleaned coal outlet and offgas outlet, described lump coal entrance is connected with the outlet of described lump coal；
Pyrolysis installation, described pyrolysis installation have cleaned coal entrance, semicoke outlet and pyrolysis oil gas vent, described cleaned coal entrance with
The outlet of described cleaned coal is connected；
Semicoke waste-heat recovery device, described semicoke waste-heat recovery device has semicoke entrance, cooling semicoke outlet and heat outlet,
Described semicoke entrance is connected with the outlet of described semicoke, and described heat outlet is connected with described hot-wind inlet；
Fine coal drying device, described fine coal drying device has fine coal entrance, is dried hot gas inlet, xeraphium coal export and does
Dry offgas outlet, described fine coal entrance is connected with the outlet of described fine coal；And
Gasifying powder coal device, described gasifying powder coal device has the outlet of dry fine coal entrance gentle activating QI, and described dry fine coal enters
Mouth is connected with described xeraphium coal export.
Thus, according to the system of the process low-order coal of this utility model embodiment by low-order coal is carried out staged care, obtain
Lump coal and fine coal, then use hot blast to process gained lump coal, not only achieves predrying and discharge refuse integration, and
The moisture on low-order coal surface can be removed by pre-dried, thus (especially smart between granule during reducing discharge refuse
Between coal and spoil) bonding probability, solve the problem that existing combined type discharge refuse technology is low to lump coal rate of discharging refuse, and
Solve the problem that semicoke calorific value is low, ash is high and sulphur content is high after pyrolysis, i.e. use the system of the present utility model can be notable
Improve the quality of pyrolysis product in pyrolytic process, secondly by by combined type discharge refuse technology and pyrolytic technique organic integration, ingenious
The waste heat produced in pyrolytic process is used for discharge refuse process, processing procedure energy cost can be significantly reduced, additionally by
It is dried process before fine coal is carried out gasification process, gas yield in gasification can be significantly improved, by classification gained
Fine coal carries out gasification process, is possible not only to significantly improve raw material availability, and can improve Business Economic Benefit.
It addition, it is special to have following additional technology according to the system of the process low-order coal of this utility model above-described embodiment
Levy:
Optional, the system of described process low-order coal farther includes: dust arrester, described dust arrester have gas inlet,
Gas outlet and dust outlet, described gas inlet is connected with described offgas outlet and described dry offgas outlet respectively.
Optional, the system of described process low-order coal farther includes: waste heat recovery plant, and described waste heat recovery plant has
Gasification gas entrance, gas exit and superheated steam outlet, described gasification gas entrance is connected with the outlet of described gasification gas, described mistake
Vapours outlet is connected with described dry hot gas inlet.Thus, it is possible to realize making full use of of system waste heat, thus reduce energy
Source cost.
Additional aspect of the present utility model and advantage will part be given in the following description, and part will become from the following description
Obtain substantially, or recognized by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage are from combining the accompanying drawings below description to embodiment and will become
Substantially with easy to understand, wherein:
Fig. 1 is the system structure schematic diagram of the process low-order coal according to one embodiment of this utility model；
Fig. 2 is the system structure schematic diagram of the process low-order coal according to this utility model further embodiment；
Fig. 3 is the system structure schematic diagram of the process low-order coal according to another embodiment of this utility model；
Fig. 4 is the method flow signal of the system process low-order coal of the process low-order coal using one embodiment of this utility model
Figure；
Fig. 5 is the method flow signal of the system process low-order coal of the process low-order coal using this utility model further embodiment
Figure；
Fig. 6 is the method flow signal of the system process low-order coal of the process low-order coal using another embodiment of this utility model
Figure；
Fig. 7 is the system structure schematic diagram of the process low-order coal according to another embodiment of this 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 this 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 ",
Orientation or the position relationship of the instruction such as " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", " circumferential " are based on accompanying drawing
Shown orientation or position relationship, be for only for ease of description this utility model and simplify description rather than instruction or hint institute
The device that refers to or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this reality
With novel restriction.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance or
Person implies the quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In description of the present utility model, " multiple " are meant that at least two, such as two
Individual, three etc., unless otherwise expressly limited specifically.
In this 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, unless otherwise clear and definite restriction.Common for this area
For technical staff, above-mentioned term concrete meaning in this utility model can be understood as the case may be.
In this utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score permissible
It is that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature
Second feature " on ", " top " and " above " but fisrt feature 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 first
Feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
At an aspect of the present utility model, the utility model proposes a kind of system processing low-order coal.New according to this practicality
The embodiment of type, this system includes: grading plant, and described grading plant has low-order coal entrance, lump coal outlet and fine coal and goes out
Mouthful；Lump coal hot blast combined type sorting unit, described lump coal hot blast combined type sorting unit have lump coal entrance, hot-wind inlet,
Spoil outlet, cleaned coal outlet and offgas outlet, described lump coal entrance is connected with the outlet of described lump coal；Pyrolysis installation, described heat
Solving device and have cleaned coal entrance, semicoke outlet and pyrolysis oil gas vent, described cleaned coal entrance is connected with the outlet of described cleaned coal；Half
Burnt waste-heat recovery device, described semicoke waste-heat recovery device has semicoke entrance, cooling semicoke outlet and heat outlet, described
Semicoke entrance is connected with the outlet of described semicoke, and described heat outlet is connected with described hot-wind inlet；Fine coal drying device, described
Fine coal drying device has fine coal entrance, is dried hot gas inlet, xeraphium coal export and dry offgas outlet, and described fine coal enters
Mouth is connected with the outlet of described fine coal；And gasifying powder coal device, described gasifying powder coal device has dry fine coal entrance and gasification
Gas exports, and described dry fine coal entrance is connected with described xeraphium coal export.Inventor finds, by carrying out low-order coal point
Level processes, and obtains lump coal and fine coal, then uses hot blast to process gained lump coal, not only achieves predrying and discharge refuse
Integration, and the moisture on low-order coal surface can be removed by pre-dried, thus during reducing discharge refuse granule it
Between the bonding probability of (especially between cleaned coal and spoil), solve existing combined type discharge refuse technology low to lump coal rate of discharging refuse
Problem, and solve the problem that semicoke calorific value is low, ash is high and sulphur content is high after pyrolysis, i.e. use of the present utility model
System can significantly improve the quality of pyrolysis product in pyrolytic process, has secondly by by combined type discharge refuse technology and pyrolytic technique
Machine is integrated, cleverly the waste heat produced in pyrolytic process is used for discharge refuse process, can significantly reduce processing procedure energy cost,
It is dried process additionally by before fine coal is carried out gasification process, gas yield in gasification can be significantly improved,
Classification gained fine coal is carried out gasification process, is possible not only to significantly improve raw material availability, and business economic effect can be improved
Benefit.
System this utility model embodiment being processed low-order coal below with reference to Fig. 1-3 is described in detail.According to this practicality
Novel embodiment, this system includes: grading plant 100, lump coal hot blast combined type sorting unit 200, pyrolysis installation 300,
Semicoke waste-heat recovery device 400, fine coal drying device 500 and gasifying powder coal device 600.
According to embodiment of the present utility model, grading plant 100 has low-order coal entrance 101, lump coal outlet 102 and fine coal
Outlet 103, and be suitable to low-order coal is carried out staged care, such that it is able to obtain lump coal and fine coal.Thus, it is possible not only to show
Write the dust during reduction follow-up separation, and the waste of subsequent thermal solution preocess raw material can be avoided, thus economize in raw materials into
This.
According to an embodiment of the present utility model, the particle diameter of lump coal is not particularly restricted, and those skilled in the art can root
Selecting according to being actually needed, according to specific embodiment of the utility model, the particle diameter of lump coal can be to be not less than 6mm, and
The particle diameter of fine coal can be less than 6mm.Thus, by gained low-order coal is carried out staged care, by the lump coal of greater particle size
Supply to follow-up lump coal hot blast combined type sorting unit is carried out discharge refuse and predrying after carry out pyrolysis processing again, and will relatively granule
Fine coal supply to the follow-up gasification installation in footpath produces gasification gas, such that it is able to be possible not only to avoid the wave of raw material in pyrolytic process
Take, and Business Economic Benefit can be improved.
According to embodiment of the present utility model, lump coal hot blast combined type sorting unit 200 has lump coal entrance 201, hot blast enters
Mouth 202, spoil outlet 203, cleaned coal outlet 204 and offgas outlet 205, lump coal entrance 201 is connected with lump coal outlet 102,
And be suitable for use with hot blast the lump coal obtained by above-mentioned classification carried out discharge refuse and pre-dried, such that it is able to respectively obtain spoil,
Cleaned coal and the tail gas containing dust.Inventor finds, by using hot blast to process lump coal, not only achieves predrying
With discharge refuse integration, and the moisture on lump coal surface can be removed by pre-dried, thus during reducing discharge refuse
Bonding probability (especially between cleaned coal and spoil) between Li, solves existing combined type discharge refuse technology and arranges low-order coal
The problem that cash rate is low, and solve the problem that semicoke calorific value is low, ash is high and sulphur content is high after follow-up pyrolysis, i.e. use this
The system of utility model can significantly improve the quality of pyrolysis product in pyrolytic process.
According to an embodiment of the present utility model, the temperature of hot blast is not particularly restricted, and those skilled in the art can root
Selecting according to being actually needed, according to specific embodiment of the utility model, the temperature of hot blast can be 80～130 DEG C.
According to further embodiment of the present utility model, the flow velocity of hot blast is not particularly restricted, and those skilled in the art are permissible
Selecting according to actual needs, according to specific embodiment of the utility model, the flow velocity of hot blast can be 8～23m/s.Send out
A person of good sense find, use the hot blast of this flow rates so that in lump coal cleaned coal and spoil bright under buoyancy and each self-gravity action
Aobvious separate, and the moisture on lump coal surface can be taken away, reduce during discharge refuse (especially cleaned coal and spoil between granule
Between) bonding probability, thus improving the quality and product improving pyrolysis product in subsequent thermal solution preocess while discharge refuse efficiency
Rate.
According to embodiment of the present utility model, pyrolysis installation 300 has cleaned coal entrance 301, semicoke outlet 302 and pyrolysis oil
Gas outlet 303, cleaned coal entrance 301 and cleaned coal outlet 204 is connected, and the cleaned coal obtained by being suitable to above-mentioned sorting process enters
Row pyrolysis processing, such that it is able to obtain semicoke and pyrolysis oil gas.Inventor finds, by by combined type discharge refuse technology and pyrolysis
Technology organic integration so that carried out discharge refuse process before low-order coal is carried out pyrolysis processing, pyrolytic process can be significantly improved
Middle hydrocarbon yield.
According to an embodiment of the present utility model, the temperature of pyrolysis processing is not particularly restricted, and those skilled in the art can
To select according to actual needs, according to specific embodiment of the utility model, the temperature of pyrolysis processing can be
500～900 DEG C.
According to embodiment of the present utility model, semicoke waste-heat recovery device 400 has semicoke entrance 401, cooling semicoke outlet
402 and heat outlet 403, semicoke entrance 401 is connected with semicoke outlet 302, heat outlet 403 and hot-wind inlet 102 phase
Even, and be suitable to pyrolytic process gained semicoke is carried out waste heat recovery processing, such that it is able to obtain steam and cooling semicoke, and
The temperature controlling steam is 80～130 DEG C, and steam returns lump coal hot blast combined type sorting unit 200 uses as hot blast.
Inventor finds, by by combined type discharge refuse technology and pyrolytic technique organic integration, will pyrolytic process produce cleverly more than
Heat, for discharge refuse process, can significantly reduce processing procedure energy cost.
In this step, concrete, use the semicoke waste-heat recovery device semicoke to obtaining in pyrolytic process to carry out waste heat recovery,
The waste heat of semicoke can obtain steam by conversion in waste-heat recovery device, and obtained steam is after voltage stabilizing bag voltage stabilizing
Resupply and use as hot blast to lump coal hot blast combined type sorting unit.
According to embodiment of the present utility model, fine coal drying device 500 have fine coal entrance 501, be dried hot gas inlet 502,
Xeraphium coal export 503 and dry offgas outlet 504, fine coal entrance 501 is connected with fine coal outlet 203, and is suitable for use with
It is dried steam and fine coal is dried process, such that it is able to obtain being dried tail gas and dry fine coal.Thus, it is possible to significantly improve
Follow-up coal gasification efficiency.
According to an embodiment of the present utility model, the temperature and the flow velocity that are dried steam are not particularly restricted, art technology
Personnel can select according to actual needs, and according to specific embodiment of the utility model, the temperature being dried steam can be
100～200 degrees Celsius, the flow velocity being dried steam can be 0.1～0.5m/s.Concrete, obtained xeraphium moisture in coal contains
Amount is less than 10wt%.
According to embodiment of the present utility model, gasifying powder coal device 600 has dry fine coal entrance 601 gentle activating QI outlet 602,
It is dried fine coal entrance 601 to be connected with xeraphium coal export 503, and is suitable to dry fine coal obtained in fine coal drying device
Carry out gasification process, such that it is able to obtain the gas that gasifies.Thus, by screening gained fine coal is carried out gasification process, not only may be used
To significantly improve raw material availability, and Business Economic Benefit can be improved.
According to an embodiment of the present utility model, the temperature of gasification process is not particularly restricted, and those skilled in the art can
To select according to actual needs, according to specific embodiment of the utility model, the temperature of gasification process can be
800～1100 DEG C.
The system of the process low-order coal according to this utility model embodiment by low-order coal is carried out staged care, obtain lump coal and
Fine coal, then uses hot blast to process gained lump coal, not only achieves predrying and discharge refuse integration, and by pre-
Dried can remove the moisture on low-order coal surface, thus (especially cleaned coal and cash between granule during reducing discharge refuse
Between stone) bonding probability, solve the problem that existing combined type discharge refuse technology is low to lump coal rate of discharging refuse, and solve
The problem that semicoke calorific value is low, ash is high and sulphur content is high after pyrolysis, i.e. uses system of the present utility model can significantly improve heat
The quality of pyrolysis product in solution preocess, secondly by by combined type discharge refuse technology and pyrolytic technique organic integration, cleverly by heat
The waste heat produced in solution preocess, for discharge refuse process, can significantly reduce processing procedure energy cost, additionally by fine coal
It is dried process before carrying out gasification process, gas yield in gasification can be significantly improved, classification gained fine coal is entered
Row gasification process, is possible not only to significantly improve raw material availability, and can improve Business Economic Benefit.
With reference to Fig. 2, farther include according to the system of the process low-order coal of this utility model embodiment: dust arrester 700.
According to embodiment of the present utility model, dust arrester 700 has gas inlet 701, gas outlet 702 and dust and goes out
Mouth 703, gas inlet 701 is connected with offgas outlet 205 and dry offgas outlet 504 respectively, and is suitable to lump coal hot blast
The tail gas containing dust obtained in combined type sorting unit 200 and fine coal drying device 500 obtain doing containing dust
Dry tail gas carries out dust removal process, can collect and obtain dust.Thus, by dust removal process, can isolate in tail gas and take out of
Dust, thus reduce environmental pollution.Concrete, dust arrester can be whirlwind separator.
With reference to Fig. 3, farther include according to the system of the process low-order coal of this utility model embodiment: waste heat recovery plant 800.
According to embodiment of the present utility model, waste heat recovery plant 800 has gasification gas entrance 801, gas exit 802 and
Superheated steam outlet 803, the gas entrance 801 that gasifies is connected with gasification gas outlet 602, superheated steam outlet 803 and dry heat
Gas entrance 502 is connected, and is suitable to waste heat recovery plant, the gasification gas obtained in gasifying powder coal device supply is carried out waste heat
Recycling, such that it is able to obtain coal gas and superheated steam, and is back to fine coal drying device 500 as dry using superheated steam
Scorching gas uses.Thus, it is possible to realize making full use of of system waste heat, thus reduce energy cost.Concrete, by used heat
The superheat steam temperature obtained in retracting device controls at 100～200 degrees Celsius, then does as fine coal after voltage stabilizing bag voltage stabilizing
The dry medium of dry process.According to specific embodiment of the utility model, waste heat recovery plant can be waste heat boiler.
As it has been described above, according to the system of the process low-order coal of this utility model embodiment can have selected from following advantage at least it
One:
The system of the process low-order coal according to this utility model embodiment use classification, sort, be dried, lump coal is pyrolyzed and fine coal
Gasification low-order coal Application way, by the sorting of low-order coal, be dried, pyrolysis, gasification technology integrated, by the hot blast of lump coal
Spoil in combined type dry separation removing raw coal and the outer water of part, the cleaned coal after sorting uses lump coal and fine coal to be utilized respectively,
Decrease the treatment process of material, and use and reclaim after pyrolysis the waste heat of semicoke as lump coal compound sorting unit by dry method
Sorting and predrying medium, the waste heat using waste heat recovery plant to reclaim gasification gas is dried medium as fine coal, reduces system
Energy consumption and operating cost, reduce environmental pollution, meanwhile, improve the classified utilization rate of low-order coal.
The system of the process low-order coal according to this utility model embodiment uses the method for the upgrading that sorts, is dried, is pyrolyzed and gasifies,
The method is medium optional and easy coal separation processing lump coal, and when fine coal should not sort, economic benefit is the most obvious.
Understand for convenience, below to using this utility model embodiment to process the method that the system of low-order coal processes low-order coal
It is described.According to embodiment of the present utility model, the method includes: (1) is by low-order coal supply to described grading plant
Carry out staged care, in order to obtain lump coal and fine coal；(2) by lump coal supply to described lump coal hot blast combined type sorting unit
Use hot blast that described lump coal is carried out discharge refuse and pre-dried, in order to respectively obtain spoil, cleaned coal and the tail gas containing dust；
(3) supply of described cleaned coal is carried out pyrolysis processing to described pyrolysis installation, in order to obtain semicoke and pyrolysis oil gas；(4) will
The supply of described semicoke carries out waste heat recovery processing to described semicoke waste-heat recovery device, in order to obtain cooling down semicoke and steam,
And described steam return step (2) is used as described hot blast；(5) by the supply of described fine coal to described fine coal drying device
Middle employing is dried steam and described fine coal is dried process, in order to obtain being dried tail gas and dry fine coal；And (6) are by institute
State the supply of dry fine coal and carry out gasification process to described gasifying powder coal device, in order to obtain the gas that gasifies.Inventor finds, passes through
Low-order coal is carried out staged care, obtains lump coal and fine coal, then use hot blast that gained lump coal is processed, not only realize
Predrying and discharge refuse integration, and the moisture on low-order coal surface can be removed by pre-dried, thus the row of reducing
During cash, bonding probability (especially between cleaned coal and spoil) between granule, solves existing combined type discharge refuse technology
The problem low to lump coal rate of discharging refuse, and solve the problem that semicoke calorific value is low, ash is high and sulphur content is high after pyrolysis, i.e. adopt
The quality of pyrolysis product in pyrolytic process can be significantly improved, secondly by by combined type discharge refuse skill by system of the present utility model
Art and pyrolytic technique organic integration, be used for discharge refuse process by the waste heat produced in pyrolytic process cleverly, can significantly reduce place
Reason process energy cost, is dried process additionally by before fine coal is carried out gasification process, can significantly improve gasification
During gas yield, classification gained fine coal is carried out gasification process, is possible not only to significantly improve raw material availability, Er Qieke
To improve Business Economic Benefit.It should be noted that it is above-mentioned same for the feature and advantage described by the system of process low-order coal
Sample is applicable to the method for this process low-order coal, and here is omitted.
The method system using this utility model embodiment to process low-order coal being processed low-order coal below with reference to Fig. 4-6 is carried out
Describe in detail.According to embodiment of the present utility model, the method includes:
S100: low-order coal supply is carried out staged care to grading plant
According to embodiment of the present utility model, low-order coal supply is carried out staged care, such that it is able to obtain to grading plant
Lump coal and fine coal.Thus, it is possible to avoid the waste of subsequent thermal solution preocess cleaned coal, thus the cost that economizes in raw materials.
According to an embodiment of the present utility model, the particle diameter of lump coal is not particularly restricted, and those skilled in the art can root
Selecting according to being actually needed, according to specific embodiment of the utility model, the particle diameter of lump coal can be to be not less than 6mm, and
The particle diameter of fine coal can be less than 6mm.Thus, by low-order coal is carried out staged care, the lump coal of greater particle size is supplied
To follow-up lump coal hot blast combined type sorting unit is carried out discharge refuse and predrying after carry out pyrolysis processing again, and by relatively small particle
Fine coal supply to follow-up gasification installation produces gasification gas, such that it is able to be possible not only to avoid the waste of raw material in pyrolytic process,
And Business Economic Benefit can be improved.
S200: will use hot blast that lump coal carries out discharge refuse and predrying place in lump coal supply to lump coal hot blast combined type sorting unit
Reason
According to embodiment of the present utility model, the lump coal obtained by above-mentioned classification is supplied to lump coal hot blast combined type sorting unit
Middle employing hot blast carries out discharge refuse and pre-dried to lump coal, such that it is able to respectively obtain spoil, cleaned coal and the tail containing dust
Gas.Inventor finds, by using hot blast to process lump coal, not only achieves predrying and discharge refuse integration, and
The moisture on lump coal surface can be removed by pre-dried, thus (especially cleaned coal between granule during reducing discharge refuse
And between spoil) bonding probability, solve the problem that existing combined type discharge refuse technology is low to low-order coal rate of discharging refuse, and
Solve the problem that semicoke calorific value is low, ash is high and sulphur content is high after follow-up pyrolysis, i.e. use system of the present utility model permissible
Significantly improve the quality of pyrolysis product in pyrolytic process.
According to an embodiment of the present utility model, the temperature of hot blast is not particularly restricted, and those skilled in the art can root
Selecting according to being actually needed, according to specific embodiment of the utility model, the temperature of hot blast can be 80～130 DEG C.
According to further embodiment of the present utility model, the flow velocity of hot blast is not particularly restricted, and those skilled in the art are permissible
Selecting according to actual needs, according to specific embodiment of the utility model, the flow velocity of hot blast can be 8～23m/s.Send out
A person of good sense find, use the hot blast of this flow rates so that in lump coal cleaned coal and spoil bright under buoyancy and each self-gravity action
Aobvious separate, and the moisture on lump coal surface can be taken away, reduce during discharge refuse (especially cleaned coal and spoil between granule
Between) bonding probability, thus improving the quality and product improving pyrolysis product in subsequent thermal solution preocess while discharge refuse efficiency
Rate.
S300: cleaned coal supply is carried out pyrolysis processing to pyrolysis installation
According to embodiment of the present utility model, the cleaned coal obtained by above-mentioned lump coal hot blast combined type sorting unit is pyrolyzed
Process, such that it is able to obtain semicoke and pyrolysis oil gas.Inventor finds, by combined type discharge refuse technology and pyrolytic technique being had
Machine is integrated so that carried out discharge refuse process before low-order coal is carried out pyrolysis processing, can significantly improve oil gas in pyrolytic process
Productivity.
According to an embodiment of the present utility model, the temperature of pyrolysis processing is not particularly restricted, and those skilled in the art can
To select according to actual needs, according to specific embodiment of the utility model, the temperature of pyrolysis processing can be
500～900 DEG C.
S400: semicoke supply is carried out waste heat recovery processing to semicoke waste-heat recovery device, and steam is returned lump coal hot blast
Combined type sorting unit uses as hot blast
According to embodiment of the present utility model, remaining by gained semicoke supply in pyrolytic process to semicoke waste-heat recovery device is carried out
Recuperation of heat processes, such that it is able to obtain steam and cooling semicoke, and the temperature controlling steam is 80～130 DEG C, and by steam
Return lump coal hot blast combined type sorting unit to use as hot blast.Inventor finds, by by combined type discharge refuse technology and pyrolysis
Technology organic integration, is used for discharge refuse process by the waste heat produced in pyrolytic process cleverly, can significantly reduce processing procedure energy
Source cost.
In this step, concrete, use the semicoke waste-heat recovery device semicoke to obtaining in pyrolytic process to carry out waste heat recovery,
The waste heat of semicoke can obtain steam by conversion in semicoke waste-heat recovery device, and obtained steam is steady through voltage stabilizing bag
Resupply after pressure and use as hot blast to lump coal hot blast combined type sorting unit.
S500: fine coal is dried process by using dry steam in fine coal supply to fine coal drying device
According to embodiment of the present utility model, by dry to employing in fine coal drying device for the fine coal supply obtained by grading plant
Scorching gas is dried process to fine coal, such that it is able to obtain being dried tail gas and dry fine coal.Thus, it is possible to after significantly improving
Continued powder coal gasification efficiency.
According to an embodiment of the present utility model, the temperature and the flow velocity that are dried steam are not particularly restricted, art technology
Personnel can select according to actual needs, and according to specific embodiment of the utility model, the temperature being dried steam can be
100～200 degrees Celsius, the flow velocity being dried steam can be 0.1～0.5m/s.Concrete, obtained xeraphium moisture in coal contains
Amount is less than 10wt%.
S600: the supply of dry fine coal is carried out gasification process to gasifying powder coal device
According to embodiment of the present utility model, the dry fine coal obtained by fine coal drying device is supplied to gasifying powder coal device
In carry out gasification process, such that it is able to obtain gasify gas.Thus, by screening gained fine coal being carried out gasification process, not only
Raw material availability can be significantly improved, and Business Economic Benefit can be improved.
According to an embodiment of the present utility model, the temperature of gasification process is not particularly restricted, and those skilled in the art can
To select according to actual needs, according to specific embodiment of the utility model, the temperature of gasification process can be
800～1100 DEG C.
The system of the process low-order coal according to this utility model embodiment processes the method for low-order coal by low-order coal is carried out classification
Process, obtain lump coal and fine coal, then use hot blast that gained lump coal is processed, not only achieve predrying and discharge refuse one
Body, and the moisture on low-order coal surface can be removed by pre-dried, thus during reducing discharge refuse between granule
The bonding probability of (especially between cleaned coal and spoil), solves existing combined type discharge refuse technology low to lump coal rate of discharging refuse
Problem, and solve the problem that semicoke calorific value is low, ash is high and sulphur content is high after pyrolysis, i.e. use system of the present utility model
System can significantly improve the quality of pyrolysis product in pyrolytic process, secondly by by organic to combined type discharge refuse technology and pyrolytic technique
Integrated, cleverly the waste heat produced in pyrolytic process is used for discharge refuse process, processing procedure energy cost can be significantly reduced,
It is dried process additionally by before fine coal is carried out gasification process, gas yield in gasification can be significantly improved,
Classification gained fine coal is carried out gasification process, is possible not only to significantly improve raw material availability, and business economic effect can be improved
Benefit.
With reference to Fig. 5, the method processing low-order coal according to the system of the process low-order coal of this utility model embodiment farther includes:
S700: the tail gas containing dust and dry tail gas are supplied and carries out dust removal process to dust arrester
According to embodiment of the present utility model, the tail gas containing dust obtained by step S100 is supplied and in step S500
The tail gas containing dust obtained carries out dust removal process to dust arrester, can collect dust.Thus, by dust removal process,
The dust taken out of in tail gas can be isolated, thus reduce environmental pollution.Concrete, dust arrester can be that cyclone type separates
Device.
With reference to Fig. 6, the method processing low-order coal according to the system of the process low-order coal of this utility model embodiment farther includes:
S800: the supply of gasification gas is carried out waste heat recovery processing to waste heat recovery plant, and superheated steam is returned S500
Middle use as dry-heat air
According to embodiment of the present utility model, the gasification gas obtained in gasifying powder coal device supply is entered to waste heat recovery plant
Row waste heat recovery processing, such that it is able to obtain coal gas and superheated steam, and is back to fine coal drying device 500 by superheated steam
Use as dry steam.Thus, it is possible to realize making full use of of system waste heat, thus reduce energy cost.Concrete,
The superheat steam temperature obtained in waste heat recovery plant is controlled at 100～200 degrees Celsius, then conduct after voltage stabilizing bag voltage stabilizing
The dry medium of fine coal dry run.
Below with reference to specific embodiment, this utility model is described, it should be noted that these embodiments are only retouched
The property stated, and limit this utility model never in any form.
Embodiment
Low-order coal raw coal is processed by the system using the process low-order coal shown in Fig. 7, and the raw coal treating capacity of the present embodiment is
300000 tons/year, processing particle size range is full particle size fraction, the moisture of raw coal, ash, sulphur content, the analysis result such as table 1 of calorific value
Shown in.
The analysis result of table 1 raw coal character
| Full water (wt%) | Ash (wt%) | Sulphur content (wt%) | Lower heat value (kcal/kg) |
| Mt | Aad | St,ad | Qnet,ar |
| 18.02 | 18.16 | 0.89 | 4248.18 |
Detailed description of the invention includes the processing step of following sequence:
1), raw coal first sent into grading plant by run coal bin by belt and feeder and carry out staged care, obtain lump coal (grain
Degree is not less than 6mm, and ash is 23.40%) and fine coal (granularity is less than 6mm, and ash is 14.73%)；
2), the lump coal supply obtained by after classification is carried out sorting process to lump coal hot blast combined type sorting unit, control hot blast
Temperature 105 DEG C, ascending air speed 13.76m/s, lump coal, after hot blast combined type discharge refuse processes, obtains head coal product, cleaned coal
Moisture, ash, sulphur content be respectively 16.42%, 13.12%, 0.56%, just started with outer hot wind supply as discharge refuse medium；
3), by obtained cleaned coal sending into pyrolysis installation and carry out pyrolysis processing, pyrolysis temperature is 600 DEG C, obtain being pyrolyzed oil gas and
Semicoke, wherein the butt productivity of gained semicoke is 73.90%, and calorific value is 6233.75kcal/kg；
4), obtained semicoke supply is carried out remaining recycling to semicoke waste-heat recovery device, obtain cooling down semicoke and heat
Gas, and obtained steam (80～130 DEG C) is sent in lump coal hot blast combined type sorting unit after voltage stabilizing make as hot blast
With；
5), by fine coal send into fine coal drying device and be dried process, obtain being dried fine coal, the dry medium just begun with
For superheated steam, baking temperature is 150 DEG C, is dried the moisture 7.44% of fine coal；
6), by step 2) gained sorting tail gas and step 5) gained be dried tail gas supply carry out, to dust arrester, process of gathering dust；
7), by dry fine coal feeding and carry out gasification process in gasification installation, obtain the gas that gasifies, gasification temperature is 950 DEG C, gasification
Agent is oxygen/steam, is then entered in waste heat recovery plant by gasification gas and carries out recovery waste heat, obtains coal gas and superheated steam,
And superheated steam supply is used as dry medium to fine coal drying device, hydrogen from waste heat recovery plant coal gas out
The volume content of gas is 35%, and the volume content of carbon monoxide is 29%, has just begun to use the superheated steam of outer confession as fine coal
Dry medium.
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
Any one or multiple embodiment or example combine in an appropriate manner.Additionally, in the case of the most conflicting, this area
Technical staff the feature of the different embodiments described in this specification or example and different embodiment or example can be carried out
In conjunction with and combination.
Although above it has been shown and described that embodiment of the present utility model, it is to be understood that above-described embodiment is 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 this utility model
Above-described embodiment be changed, revise, to replace and modification.
Claims (3)
1. the system processing low-order coal, it is characterised in that including:
Grading plant, described grading plant has low-order coal entrance, lump coal outlet and fine coal outlet；
Lump coal hot blast combined type sorting unit, described lump coal hot blast combined type sorting unit have lump coal entrance, hot-wind inlet,
Spoil outlet, cleaned coal outlet and offgas outlet, described lump coal entrance is connected with the outlet of described lump coal；
Pyrolysis installation, described pyrolysis installation have cleaned coal entrance, semicoke outlet and pyrolysis oil gas vent, described cleaned coal entrance with
The outlet of described cleaned coal is connected；
Semicoke waste-heat recovery device, described semicoke waste-heat recovery device has semicoke entrance, cooling semicoke outlet and heat outlet,
Described semicoke entrance is connected with the outlet of described semicoke, and described heat outlet is connected with described hot-wind inlet；
Fine coal drying device, described fine coal drying device has fine coal entrance, is dried hot gas inlet, xeraphium coal export and does
Dry offgas outlet, described fine coal entrance is connected with the outlet of described fine coal；And
Gasifying powder coal device, described gasifying powder coal device has the outlet of dry fine coal entrance gentle activating QI, and described dry fine coal enters
Mouth is connected with described xeraphium coal export.
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, gas outlet and dust outlet, described gas inlet respectively with
Described offgas outlet is connected with described dry offgas outlet.
The system of process low-order coal the most according to claim 1 and 2, it is characterised in that farther include:
Waste heat recovery plant, described waste heat recovery plant has gasification gas entrance, gas exit and superheated steam outlet, described
Gasification gas entrance is connected with the outlet of described gasification gas, and the outlet of described superheated steam is connected with described dry hot gas inlet.
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| CN201620226940.7U CN205501220U (en) | 2016-03-23 | 2016-03-23 | System for handle low order coal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105670699A (en) * | 2016-03-23 | 2016-06-15 | 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 coal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105670699A (en) * | 2016-03-23 | 2016-06-15 | 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 coal |
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