CN106701232A - Method for drying and upgrading lignite - Google Patents
Method for drying and upgrading lignite Download PDFInfo
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- CN106701232A CN106701232A CN201611060668.0A CN201611060668A CN106701232A CN 106701232 A CN106701232 A CN 106701232A CN 201611060668 A CN201611060668 A CN 201611060668A CN 106701232 A CN106701232 A CN 106701232A
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/04—Raw material of mineral origin to be used; Pretreatment thereof
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/24—Combating dust during shaping or briquetting; Safety devices against explosion
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/26—After-treatment of the shaped fuels, e.g. briquettes
- C10L5/28—Heating the shaped fuels, e.g. briquettes; Coking the binders
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/26—After-treatment of the shaped fuels, e.g. briquettes
- C10L5/30—Cooling the shaped fuels, e.g. briquettes
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
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- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/08—Treating solid fuels to improve their combustion by heat treatments, e.g. calcining
- C10L9/086—Hydrothermal carbonization
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- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/02—Combustion or pyrolysis
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- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/08—Drying or removing water
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- C—CHEMISTRY; METALLURGY
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- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/28—Cutting, disintegrating, shredding or grinding
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- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/32—Molding or moulds
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Abstract
The invention discloses a method for drying and upgrading lignite. The method comprises the following steps: S1, breaking and screening raw coal of the lignite; S2, inputting the screened lignite into an air current crushing dryer for breaking and drying; S3, carrying out gas-solid separation on mixed gas exhausted from the air current crushing dryer to obtain pulverized coal and dust-containing gas, and collecting separated pulverized coal; S4, carrying out compression moulding on the pulverized coal collected in the step S3 to obtain moulded coal; S5, pyrolyzing the moulded coal to obtain upgraded coal, pyrolysis gas and tar. According to the method for drying and upgrading the lignite, disclosed by the invention, the water content in the pulverized coal is effectively reduced, and the lignite treatment amount of the air current crushing dryer is relatively improved; compared with a repeated drying mode on the basis of breaking and drying the lignite in the relevant art, the method disclosed by the invention has the advantages that energy consumption is favorably reduced, and the utilization efficiency of energy is improved.
Description
Technical field
The present invention relates to brown coal drying and upgrading technical field, more particularly, to a kind of method of brown coal drying and upgrading.
Background technology
Lignite is higher compared with other coal water content, generally up to 30wt%~50wt%.Easily aoxidized due to lignite, hole hair
Up to, water content is big, carbon content is low and content of ashes is high.Therefore the high-moisture in lignite directly increases cost of transportation, device
Build and operating cost, or even influence the normal operation of process units, reduce the generating with lignite as raw material or Coal Chemical Industry
Purpose economy.After by brown coal drying and upgrading, the moulded coal with certain particle size and compactness is made.Then, then by moulded coal in heat
It is pyrolyzed in solution device, tar, three kinds of products of pyrolysis gas and upgraded coal can be obtained, with good economic benefit and society
Benefit.Moreover, performance is superior to lignite raw coal to upgraded coal in every respect, and can effectively solve lignite and transporting, storing
Easy-weathering is broken in journey, oxidizable spontaneous combustion the problems such as.Therefore, the shaping of lignite and pyrolytic technique turn into lignite treatment in recent years and
One of main direction of studying of application aspect.Brown coal drying and upgrading technology in correlation technique is multiple to the lignite after crushing and screening
Dry, cause energy consumption too high during brown coal drying and upgrading, be unfavorable for energy-conservation.
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 is carried
Go out a kind of method of brown coal drying and upgrading, be capable of achieving the upgrading to lignite, so as to obtain upgraded coal, can effectively solve lignite in fortune
Easy-weathering is broken during defeated, storage, oxidizable spontaneous combustion the problems such as, with good economic benefit and social benefit, Er Qie
During brown coal drying and upgrading, energy consumption is low, is conducive to improving energy-saving effect.
The method of brown coal drying and upgrading according to embodiments of the present invention comprises the following steps：S1：Lignite raw coal is broken
Broken, screening；S2：Lignite after screening is input in air-flow crushing drier carries out broken drying；S3：To from the air-flow crushing
The mixed gas of drier discharge carry out gas solid separation to obtain fine coal and dusty gas, the fine coal that collection is separated；S4：Will
The fine coal that is collected into step S3 is compressing to obtain moulded coal；S5：The moulded coal is pyrolyzed to obtain upgraded coal, pyrolysis gas
And tar.
The method of brown coal drying and upgrading according to embodiments of the present invention, is crushed to lignite raw coal, is screened, then first
Lignite after screening is input in air-flow crushing drier carries out broken drying, then to being discharged from air-flow crushing drier
Mixed gas carry out gas solid separation to obtain fine coal and dusty gas, collect the fine coal separated and the fine coal pressure that will be collected into
The type of being made obtains moulded coal, further moulded coal is pyrolyzed to obtain upgraded coal, pyrolysis gas and tar, and this can effectively solve lignite
Easy-weathering during transport, storage is broken, oxidizable spontaneous combustion the problems such as, with good economic benefit and social benefit, and
And during to brown coal drying and upgrading, lignite is crushed and dried by using air-flow crushing drier, not only have
Effect ground reduces water content in fine coal, and with respect to improve the lignite treating capacity of pyrolytic process, with correlation technique in
Drying is further repeated on the basis of dry to brown coal crushing to compare, energy consumption is advantageously reduced, and improves efficiency of energy utilization.
Some embodiments of the invention, also comprised the following steps before step S5：S6：Using coolant to described
The dusty gas separated in step S3 is cooled down to obtain shower water and gas-liquid mixture；S7：Shower water is consolidated
Liquid separates to obtain mud；S8：Suppressed after the mud obtained in step S7 is mixed with the fine coal being collected into step S3
Shaping obtains the moulded coal.
Some embodiments of the invention, the gas-liquid mixture to being separated in the step S6 carries out gas-liquid separation
To obtain gas and liquid, the liquid that collection is isolated.
Further, at least a portion gas separated is heated to obtain recuperated gas, by the heat exchange
Gas is drained into the air-flow crushing drier in the step S2 Nei as the dry gas in the air-flow crushing drier.
Alternatively, discharged after being cooled down to a part of gas separated.
Alternatively, a part of liquid that will be separated is used in step S4 and step S8 make the use during moulded coal
Water.
Further, the liquid isolated using the liquid separated in step S7 and from the gas-liquid mixture is used as step
The coolant cooled down to the dusty gas in rapid S6.
, be input to for the lignite after screening using feeding screw in the step S2 by some embodiments of the invention
In the air-flow crushing drier.
The dry gas used in some embodiments of the invention, the air-flow crushing drier are inert gas.
Some embodiments of the invention, in step s3 mixed gas to being discharged from the air-flow crushing drier
Carry out gas solid separation twice.
Brief description of the drawings
Fig. 1 is sieving approach device according to some embodiments of the invention, feed arrangement, air-flow crushing drier and heat exchange
The connection diagram of device；
Fig. 2 be water-cooling apparatus according to some embodiments of the invention, gas-liquid separator, water plug and water storage device it
Between connection diagram；
Fig. 3 is the connection diagram of the part-structure of brown coal drying and upgrading device according to some embodiments of the invention；
Fig. 4 is the connection diagram of the part-structure of the brown coal drying and upgrading device according to other embodiments of the invention；
Fig. 5 is the schematic flow sheet of brown coal drying and upgrading method according to embodiments of the present invention.
Reference：
Brown coal drying and upgrading device 100；
Sieving approach device 1；Feed arrangement 2；
Air-flow crushing drier 3；Import 31；Outlet 32；Gas access 33；
Gas-solid separating device 4；Cyclone separator 41；Deduster 42；
Mixing arrangement 5；Shaped device 6；Pyrolysis installation 7；
Water-cooling apparatus 8；Spray column 81；Outlet 811；Solid-liquid separator 82；
Gas-liquid separator 9；Gas vent 91；Liquid outlet 92；
Water storage device 10；Water plug 11；
Heat exchanger 12；Collection device 13；Feed bin 14；Air-introduced machine 15.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings.Below with reference to
The embodiment of Description of Drawings 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 " on ", D score, "left", "right", " level ", " top ",
" bottom ", " interior ", " outward ", etc. instruction orientation or position relationship be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify describe, rather than indicate imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.
Brown coal drying and upgrading device 100 according to embodiments of the present invention, brown coal drying and upgrading are described below with reference to Fig. 1-Fig. 4
Device 100 is used for the upgrading of lignite to obtain upgraded coal and tar.
As shown in Figure 1-Figure 3, brown coal drying and upgrading device 100 according to embodiments of the present invention can include：Sieving approach
Device 1, air-flow crushing drier 3, gas-solid separating device 4, shaped device 6 and pyrolysis installation 7.
Specifically, sieving approach device 1 is used to that lignite raw coal to be crushed and screened.Specifically, the lignite of collection
Raw coal can be placed in sieving approach device 1, first by sieving approach device 1 by the beginning of the block lignite raw coal in lignite raw coal
Step is broken, and the lignite raw coal after crushing further filters out the less lignite of granularity under the screening of sieving approach device 1.Example
Such as, screening breaker can filter out lignite of the granularity in below 20mm.
Feed arrangement 2 is provided between the import 31 of air-flow crushing drier 3 and the outlet of sieving approach device 1, thus, sieve
The lignite divided after the crushing and screening of breaker 1 can be entered into feed arrangement 2 by the outlet of sieving approach device 1, charging dress
Putting 2 can be delivered in air-flow crushing drier 3 its internal lignite.Alternatively, feed arrangement 2 is feeding screw.
Specifically, as shown in Figure 1 and Figure 4, feed bin 14 can be provided between feed arrangement 2 and sieving approach device 1, be sieved
Lignite after point crushing and screening of breaker 1 by the outlet of sieving approach device 1 can enter into feed bin 14 and be temporarily stored within
In feed bin 14, the lignite in subsequent feed bin 14 can be delivered in air-flow crushing drier 3 in the presence of feed arrangement 2 to treat gas
Stream crushing drier 3 carries out crushing and drying further to it.
Specifically, as shown in Figure 1 and Figure 4, air-flow crushing drier 3 has import 31, outlet 32 and gas access 33.
Such as import 31 is located on the side wall of air-flow crushing drier 3, and gas access 33 is located at the bottom of air-flow crushing drier 3, goes out
Mouth 32 is located at the top of air-flow crushing drier 3.The lignite of the conveying of feed arrangement 2 can enter into air-flow crushing and do by import 31
In dry device 3, xeothermic dry gas can be entered into air-flow crushing drier 3 from gas access 33, and dry gas can impact gas
Stream crushes the lignite in drier 3, and shears collision, impact lignite jointly with the disintegrating machine in air-flow crushing drier 3, causes
Lignite is knocked and is ground into fine coal, and fine coal surface area increases rapidly, and the heat and mass transfer process of reinforcing makes the moisture on fine coal surface fast
Speed evaporation；Then, machinery and airflow function again constantly update fine coal surface, so as to be rapidly completed the drying process of fine coal, do
The part vapor that the fine coal and fine coal of dry completion are produced when drying forms mixed gas from air-flow crushing drier with air-flow
3 outlet 32 is discharged, and undried lignite is larger because of sinking speed, is broken again after the bottom of air-flow crushing drier 3 is fallen into again
It is broken.
Specifically, clasfficiator is provided with air-flow crushing drier 3, clasfficiator neighbouring can export 32 and set, crush after drying
Fine coal with dry gas rise during be graded device screening, dry fine coal with air-flow discharge, it is unseasoned
Material continue in air-flow crushing drier 3 dry, to ensure dry products quality and prevent material from overheating.For example, classification
Device can filter out fine coal of the granularity within 1mm.
Thus, lignite is crushed and is dried by using air-flow crushing drier 3, not only significantly reduced fine coal
In water content, and being dried to brown coal crushing in the relative lignite treating capacity that improve pyrolysis installation, with correlation technique
On the basis of further repeat drying and compare, advantageously reduce the energy consumption of brown coal drying and upgrading device 100, improve energy-saving effect.
Inventor has found in practical study, can 60%- in drying brown coal using the air-flow crushing drier 3 of the present embodiment
80% water, usually, the water content that lignite is crushed in the fine coal formed after drying in air-flow crushing drier 3 is less than
10%.
As shown in figure 4, gas-solid separating device 4 is connected to receive from air-flow crushing with the outlet 32 of air-flow crushing drier 3
The mixed gas of the discharge of drier 3 simultaneously are separated to obtain fine coal and dusty gas to mixed gas, that is to say, that from air-flow
The mixed gas for crushing discharge in drier 3 can realize gas solid separation in gas-solid separating device 4, so as to isolate fine coal and contain
Dust and gas body.
As shown in figure 3, shaped device 6 is connected with the solid outlet of gas-solid separating device 4 with to being discharged from solid outlet
Fine coal is pressed to obtain moulded coal, and pyrolysis installation 7 is connected with shaped device 6 and be pyrolyzed with to moulded coal, so as to be pyrolyzed
Device 7 respectively obtains tar, pyrolysis gas and upgraded coal after moulded coal is pyrolyzed, realize the acquisition to upgraded coal and tar.
It is, of course, understood that as shown in figure 4, without to crush dried fine coal be molded and be pyrolyzed or
Person is molded and is pyrolyzed in needs to the dried fine coal of crushing, but because coal amount is too big, more than shaped device 6 and heat
When solving the load of device 7, brown coal drying and upgrading device 100 can also include collection device 13, and collection device 13 can be with gas-solid
Separator 4 is connected for receiving the fine coal that gas-solid separating device 4 is isolated, consequently facilitating fine coal is stored in collection device 13
It is interior with to be used.
Brown coal drying and upgrading device 100 according to embodiments of the present invention, by setting sieving approach device 1, air-flow crushing
Drier 3, gas-solid separating device 4, shaped device 6 and pyrolysis installation 7 to obtain upgraded coal, not only simple structure, and passing through
Lignite is crushed and dried using air-flow crushing drier 3, the water content in fine coal, Er Qiexiang is not only significantly reduced
In lignite treating capacity to improve air-flow crushing drier 3, with correlation technique enterprising to the dry basis of brown coal crushing
One step repeats drying and compares, and advantageously reduces the energy consumption of brown coal drying and upgrading device 100, energy-saving effect is improved, while upgraded coal
Acquisition can effectively solve lignite easy-weathering during transport, storage is broken, oxidizable spontaneous combustion the problems such as, with warp well
Ji benefit and social benefit.
Some embodiments of the invention, as shown in Figure 3 and Figure 4, gas-solid separating device 4 includes the He of cyclone separator 41
Deduster 42, cyclone separator 41 to be connected with the outlet 32 of air-flow crushing drier 3 and carry out first time gas-solid with to mixed gas
Separate, deduster 42 to be connected with the outlet of cyclone separator 41 and carry out second gas solid separation with to mixed gas.Specifically,
The mixed gas discharged from the outlet 32 of air-flow crushing drier 3 can be first into cyclone separator 41, and mixed gas exist
First time gas solid separation is carried out in cyclone separator 41 to obtain fine coal and dusty gas containing a small amount of fine coal, fine coal is from whirlwind point
Shaped device 6 is entered from the solid outlet of device 41, the dusty gas containing a small amount of fine coal is then flowed to from the outlet of cyclone separator 41
Realize second gas solid separation to obtain fine coal and dusty gas, the powder in deduster 42 in deduster 42 and in deduster 42
Coal can enter shaped device 6 by the solid outlet of deduster 42, and dusty gas is then discharged by the outlet of deduster 42.By
This, by causing that gas-solid separating device 4 includes cyclone separator 41 and deduster 42, is capable of achieving the gas-solid twice to mixed gas
Separate, so as to effectively separate fine coal from mixed gas, be conducive to improving the yield of fine coal, while reduce containing
Coal amount in dust and gas body.
Alternatively, deduster 42 is sack cleaner.
Specifically, as shown in figure 3, brown coal drying and upgrading device 100 also includes mixing arrangement 5, the entrance point of mixing arrangement 5
It is not connected to receive the fine coal that cyclone separator 41 and deduster 42 are isolated, mixing dress with cyclone separator 41 and deduster 42
The floss hole and shaped device 6 for putting 5 are connected and be drained into shaped device 6 with by mixed fine coal, thus, from cyclone separator
41 and the fine coal of solid outlet discharge of deduster 42 can sufficiently be mixed with binding agent, catalyst etc. in the mixing arrangement 5
Heel row is closed to shaped device 6.Alternatively, mixing arrangement 5 is batch mixer.
In some embodiments of the invention, as shown in figs 2-4, brown coal drying and upgrading device 100 also includes water cooling
Device 8, water-cooling apparatus 8 be connected with gas-solid separating device 4 to receive and dusty gas cooled down it is gentle to obtain mud
Liquid mixture, shaped device 6 is connected to receive mud with water-cooling apparatus 8.Specifically, isolated from gas-solid separating device 4
Dusty gas can enter water-cooling apparatus 8, dusty gas is cooled down mixed to obtain mud and gas-liquid in water-cooling apparatus 8
Compound, the mud isolated can enter shaped device 6 and suppress moulded coal in order to shaped device 6, and the gas-liquid mixture isolated can
Discharged from water-cooling apparatus 8.In the process, not only avoid and dusty gas be directly discharged into the air pollution that air is caused,
And realize recycling to mud, while with correlation technique in mud is carried out caused by sewage disposal at sewage
Reason amount is compared with the increase of cost, is conducive to the reduction of cost, simplifies technique.
Specifically, as shown in Fig. 2 water-cooling apparatus 8 includes spray column 81 and solid-liquid separator 82, spray column 81 and gas-solid
Separator 4 is connected to receive and spray to obtain shower water and gas-liquid mixture, solid-liquid separator 82 dusty gas
It is connected to receive shower water and carry out separation of solid and liquid to shower water to obtain mud with spray column 81.
That is, the dusty gas that gas-solid separating device 4 is isolated is first into spray column 81, in spray column 81
Water dusty gas can be sprayed, to cause that fine coal and water in dusty gas form shower water, the gas in dusty gas
Body and water vapour etc. form gas-liquid mixture.Shower water can be located at by the outlet 811 of spray column 81 such as outlet 811
The bottom of spray column 81 flows into solid-liquid separator 82 and realizes separation of solid and liquid in solid-liquid separator 82 to obtain mud and clear
Clear liquid, the mud that solid-liquid separator 82 is isolated can enter shaped device 6 and suppress moulded coal, spray column 81 in order to shaped device 6
Interior gas-liquid mixture can be discharged from spray column 81.Further, the solid-liquid separator 82 in the present embodiment can also with it is above-mentioned
Mixing arrangement 5 is connected, and the mud isolated can be drained into mixing arrangement 5 and same binding agent, catalysis in mixing arrangement 5 first
Agent etc. is sufficiently mixed, and is finally arranged to shaped device 6.
Further, as shown in Fig. 2 brown coal drying and upgrading device 100 also include gas-liquid separator 9, gas-liquid separator 9 with
Spray column 81 is connected to receive gas-liquid mixture and carry out gas-liquid separation to gas-liquid mixture.Specifically, from 81 points of spray column
The gas-liquid mixture for separating out can be entered in gas-liquid separator 9, and the separation of gas and liquid is realized in gas-liquid separator 9, point
The gas and liquid for separating out can be discharged from the gas vent 91 and liquid outlet 92 of gas-liquid separator 9 respectively.Thus, by spray
The quality of liquid of the gas-liquid mixture that tower 81 is separate by being obtained after the further gas-liquid separation of gas-liquid separator 9 is higher, favorably
In the recycling for realizing liquid.
Alternatively, a part of liquid that gas-liquid separator 9 is isolated can be used for shaped device 6 during moulded coal is made
Use water.
In further embodiment of the present invention, as shown in Fig. 2 brown coal drying and upgrading device 100 also includes water storage device
10 and water plug 11, water storage device 10 is connected with the liquid outlet 92 of solid-liquid separator 82 and gas-liquid separator 9, water plug
11 is connected with water storage device 10 and spray column 81 respectively pump to spray column 81 with by the liquid in water storage device 10.That is,
The clarified solution isolated from solid-liquid separator 82 and the liquid isolated from gas-liquid separator 9 can be while enter water storage device 10 simultaneously
It is stored in water storage device 10, the liquid in water storage device 10 can be pumped to spray column 81 by such as water circulating pump of water plug 11,
So as to be sprayed to realize recycling for water to entering into the dusty gas in spray column 81, it is to avoid the waste of resource.Can
Selection of land, water storage device 10 is water recovery tank.
Specifically, as shown in Figure 1 and Figure 4, brown coal drying and upgrading device 100 also includes heat exchanger 12, the one of heat exchanger 12
End is connected with the gas vent 91 of gas-liquid separator 9 and heated with to the gas discharged from gas vent 91, heat exchanger 12
The gas that second end is connected using after by heating with air-flow crushing drier 3 enters air-flow crushing drier 3 as dry gas.
That is, the gas isolated from gas-liquid separator 9 can flow to heat exchanger 12, and heat exchange forms xeothermic in heat exchanger 12
Dry gas (temperature of such as dry gas is 170~240 DEG C, and pressure is 0.7-1.2MPa), dry gas can be from air-flow powder
The gas access 33 of broken drier 3 is entered into air-flow crushing drier 3 to realize crushing and drying to lignite, so as to realize
Recycling for dry gas, significantly reduces the magnitude of recruitment of new dry gas even without the new dry gas of supplement,
Be conducive to cost-effective, economy is high.
Alternatively, the part in the gas discharged from the gas vent 91 of gas-liquid separator 9 can flow to heat exchanger 12 and enter
Row heating, another part can be discharged into air.
Specifically, control valve can be provided between the second end of heat exchanger 12 and air-flow crushing drier 3 to adjust heating
The amount of entering that dry gas afterwards are entered in air-flow crushing drier 3.
Specifically, as shown in Figure 3 and Figure 4, air-introduced machine 15, air-introduced machine are provided with the gas vent 91 of gas-liquid separator 9
Gas in 15 bootable gas-liquid separators 9 is arranged in air and/or arranging to the heat exchanger 12.
Alternatively, the dry gas entered in air-flow crushing drier 3 are inert gas such as N2, Ar etc., thus, brown
During coal drying and upgrading, can prevent lignite from spontaneous combustion occurring when drying.Certainly, the dry gas for entering fluid energy mill may be used also
Being CO2Deng.
Below with reference to Fig. 1-Fig. 3 to the structure and work of the brown coal drying and upgrading device of specific embodiment 100 of the invention
It is described in detail as principle.
As shown in Figure 1-Figure 3, the brown coal drying and upgrading device 100 of the present embodiment includes：Sieving approach device 1, feed bin 14,
Feeding screw, air-flow crushing drier 3, gas-solid separating device 4, shaped device 6, pyrolysis installation 7, mixing arrangement 5, water cooling
Device 8, gas-liquid separator 9, water storage device 10, water plug 11 and heat exchanger 12.
Sieving approach device 1 is used to that lignite raw coal to be crushed and screened, and screening breaker can filter out granularity and exist
The lignite of below 20mm.Feed bin 14 be connected with the outlet of sieving approach device 1 with receive screening breaker 1 filter out it is brown
Coal.Feeding screw is provided between the import 31 of feed bin 14 and air-flow crushing breaker, the lignite in feed bin 14 can be in spiral shell
It is delivered in the presence of precession glassware in air-flow crushing drier 3.
Temperature is 170~240 DEG C, and pressure is the CO of 0.7~1.2MPa2And N2Can be dried from air-flow crushing etc. dry gas
The gas access 33 of the bottom of device 3 is entered into air-flow crushing drier 3, dry gas can impact air-flow crush drier 3 in
Lignite, and collision, impact lignite are sheared jointly with the disintegrating machine in air-flow crushing drier 3, cause lignite to be knocked and be ground into
Fine coal, while high-temperature dry air can take away the substantial amounts of moisture in fine coal, crushes dried fine coal with dry gas stream
Rise and screened through clasfficiator, it is 160~220 DEG C that fine coal of the granularity less than 1mm and water content ＜ 10% can form temperature with air-flow
Mixed gas and discharged from the outlet 32 of air-flow crushing drier 3.
As shown in figure 3, gas-solid separating device 4 includes cyclone separator 41 and sack cleaner 42, the entrance of mixing arrangement 5
It is connected with cyclone separator 41 and sack cleaner 42 respectively.From the mixed gas that the outlet 32 of air-flow crushing drier 3 is discharged
Can be first into cyclone separator 41, mixed gas carry out first time gas solid separation to obtain powder in cyclone separator 41
Coal and the dusty gas containing a small amount of fine coal, fine coal enter mixing arrangement 5 from the solid outlet of cyclone separator 41, containing a small amount of fine coal
Dusty gas then flowed in sack cleaner 42 from the outlet of cyclone separator 41 and realize second in sack cleaner 42
To obtain fine coal and dusty gas, the fine coal in sack cleaner 42 can go out secondary gas solid separation by the solid of sack cleaner 42
Mouth enters mixing arrangement 5, and dusty gas is then discharged by the outlet of sack cleaner 42.
The fine coal for entering mixing arrangement 5 can be sufficiently mixed with binding agent, catalyst etc., and the floss hole of mixing arrangement 5 with
Shaped device 6 is connected and be pressed to obtain moulded coal with to fine coal so that mixed fine coal is drained into shaped device 6,
Pyrolysis installation 7 is connected with so that moulded coal is entered into pyrolysis installation 7 with shaped device 6, height of the pyrolysis installation 7 at 450~650 DEG C
Moulded coal is pyrolyzed under warm environment, so as to obtain tar, pyrolysis gas and upgraded coal, realizes the acquisition to upgraded coal and tar.
Specifically, as shown in Fig. 2 water-cooling apparatus 8 includes spray column 81 and solid-liquid separator 82, spray column 81 and pocket type
Deduster 42 is connected, and the dusty gas of the discharge of sack cleaner 42 is first into spray column 81, and the water in spray column 81 can
Dusty gas is sprayed, to cause that the fine coal in dusty gas forms shower water, gas and water in dusty gas with water
Form gas-liquid mixture.Shower water can be flowed into solid-liquid separator 82 and solid by the outlet 811 of the bottom of spray column 81
Separation of solid and liquid is realized to obtain mud and clarified solution in liquid/gas separator 82, and the mud that solid-liquid separator 82 is isolated can enter mixing
Same binding agent, catalyst etc. are being mixed in device 5 and together with the fine coal isolated from cyclone separator 41 and sack cleaner 42
Attach together to put in 5 and sufficiently mixed, finally arrange to shaped device 6.
Gas-liquid separator 9 is connected with spray column 81, and the gas-liquid mixture that spray column 81 is isolated can enter gas-liquid separator 9
It is interior, and in the interior separation for realizing gas and liquid of gas-liquid separator 9, the gas isolated and liquid can respectively from gas-liquid separator
9 gas vent 91 and liquid outlet 92 is discharged.
Water storage device 10 is connected with the liquid outlet of solid-liquid separator 82 and gas-liquid separator 9, water plug 11 respectively with
Water storage device 10 is connected with spray column 81.The clarified solution isolated from solid-liquid separator 82 and isolated from gas-liquid separator 9
Liquid can simultaneously enter water storage device 10 and be stored in water storage device 10, and water plug 11 can be by the liquid in water storage device 10
Spray column 81 is pumped to, so as to be sprayed to realize recycling for water to entering into the dusty gas in spray column 81, it is to avoid
The waste of resource.
As shown in figure 1, heat exchanger 12 is connected between the gas vent 91 of gas-liquid separator 9 and air-flow crushing drier 3,
In the presence of air-introduced machine 15, the temperature isolated from gas-liquid separator 9 is that the part in 40~60 DEG C of gas can be arranged
Enter in air, another part gas can flow to heat exchanger 12, and heat exchange is formed as xeothermic dry gas in heat exchanger 12, do
Pathogenic dryness body can be by controlling valve and being re-entered into air-flow crushing drier 3 from the gas access 33 of air-flow crushing drier 3
To realize crushing and drying to lignite, so as to realize recycling for dry gas.
Inventor is defined by the treating capacity of separate unit air-flow crushing drier 310t/h, using the brown coal drying in the present embodiment
37.3% lignite that the treatment of device for improving quality 100 water content is.25000Nm3/ h dries gas (40 DEG C) and is risen by the heat exchange of heat exchanger 12
Temperature is to 190 DEG C and enters into air-flow crushing drier 3 to crush drying brown coal.In air-flow crushing drier 3, lignite is crushed
To less than after 1mm, cyclone separator 41, sack cleaner 42 are sequentially entered with air-flow, gas is by spray column 81 and gas-liquid
Separator 9, the moisture that will be dried in gas cools down, recyclable water 2.5m3/ h, year 1.8 ten thousand tons of recycle-water；Gas-liquid separator 9
About 25000Nm in the gas isolated3/ h comes back in air-flow crushing drier 3 and uses through air-introduced machine 15, heat exchanger 12；
Fine coal and the mud of solid-liquid separator 82 that cyclone separator 41 and sack cleaner 42 are reclaimed, in mixing arrangement 5
It is sufficiently mixed, and upgrading product of coal is obtained after the shaping of shaped device 6 and the pyrolysis of pyrolysis installation 7, year upgrading output of coal is 3.5 ten thousand
Ton.
The method of the brown coal drying and upgrading of the embodiment of the present invention is described in detail below with reference to Fig. 5, wherein lignite is done
Dry device for improving quality realizes the upgrading to lignite using the method for the brown coal drying and upgrading.
As shown in figure 5, the method for brown coal drying and upgrading according to embodiments of the present invention comprises the following steps：
S1：Lignite raw coal is crushed, is screened.For example, being realized to lignite raw coal using above-mentioned screening breaker
Crush and screen to obtain lignite.
S2：Lignite after screening is input in air-flow crushing drier carries out broken drying, so as to further realize to brown
The broken and drying of coal.
S3：Mixed gas to being discharged from air-flow crushing drier carry out gas solid separation to obtain fine coal and dusty gas,
The fine coal that collection is separated.For example, the mixed gas discharged from air-flow crushing drier can enter gas-solid separating device simultaneously
Gas solid separation is realized in gas-solid separating device to obtain fine coal and dusty gas, and collects the fine coal isolated.
S4：Moulded coal is obtained by the fine coal being collected into step S3 is compressing.For example, using above-mentioned shaped device by gas-solid
The fine coal that separator is isolated is pressed into moulded coal.
S5：Moulded coal is pyrolyzed to obtain upgraded coal, pyrolysis gas and tar.For example, above-mentioned pyrolysis installation can be to above-mentioned
The compressing moulded coal of shaped device is pyrolyzed to obtain upgraded coal, pyrolysis gas and tar.
The method of brown coal drying and upgrading according to embodiments of the present invention, is crushed to lignite raw coal, is screened, then first
Lignite after screening is input in air-flow crushing drier carries out broken drying, then to being discharged from air-flow crushing drier
Mixed gas carry out gas solid separation to obtain fine coal and dusty gas, collect the fine coal separated and the fine coal pressure that will be collected into
The type of being made obtains moulded coal, and further moulded coal is pyrolyzed to obtain upgraded coal, pyrolysis gas and tar, so that upgraded coal is obtained,
This can effectively solve lignite easy-weathering during transport, storage is broken, oxidizable spontaneous combustion the problems such as, with good economic effect
Benefit and social benefit, and during to brown coal drying and upgrading, powder is carried out to lignite by using air-flow crushing drier
It is broken and dry, the water content in fine coal, and the relative lignite treating capacity that improve pyrolytic process are not only significantly reduced, with
The drying that further repeated on the basis of dry to brown coal crushing in correlation technique is compared, and advantageously reduces energy consumption, improves section
Can effect.
Some embodiments of the invention, also comprised the following steps before step S5：
S6：Coolant is used to cool down the dusty gas separated in step S3 mixed to obtain shower water and gas-liquid
Compound；The dusty gas that such as above-mentioned gas-solid separating device is isolated is first into spray column, the coolant in spray column
For example cold water can carry out spraying cooling to dusty gas to obtain shower water and gas-liquid mixture.
S7：Shower water is carried out separation of solid and liquid to obtain mud；For example, shower water can be flowed into solid-liquid separator and solid
Separation of solid and liquid is realized in liquid/gas separator to obtain mud and clarified solution.
S8：It is compressing after the mud obtained in step S7 is mixed with the fine coal being collected into step S3 to obtain type
Coal.For example, the mud isolated can be drained into above-mentioned mixing arrangement and mix with the fine coal isolated from gas-solid separating device
Same binding agent, catalyst etc. are sufficiently mixed in device, are finally arranged to shaped device, and shaped device is pressed it
Type is made to obtain moulded coal.
In the process, not only avoid and dusty gas is directly discharged into the air pollution that air is caused, and realize
Recycling to mud, at the same with correlation technique in sewage load and cost caused by sewage disposal are carried out to mud
Increase compare, be conducive to the reduction of cost.
Further, gas-liquid separation is carried out to obtain gas and liquid to the gas-liquid mixture separated in step S6,
The liquid that collection is isolated.The gas-liquid mixture for example isolated from spray column can be entered in gas-liquid separator, and in gas-liquid point
The separation of gas and liquid is realized in device, the gas and liquid isolated can respectively from the gas vent and liquid of gas-liquid separator
Body outlet discharge, and the liquid isolated is collected, it is advantageously implemented the recovery to liquid, it is to avoid the waste of resource.
Specifically, at least a portion gas separated is heated to obtain recuperated gas, recuperated gas is arranged
Enter in the air-flow crushing drier in step S2 as the dry gas in air-flow crushing drier.For example, available change
Hot device is heated to obtain recuperated gas at least a portion gas gone out from above-mentioned gas-liquid separator separates, then will heat exchange
Gas is drained into the dry gas as drying brown coal in air-flow crushing drier.So as to realize the circulation profit of dry gas
With, the very big usage amount for reducing new dry gas, be conducive to cost-effective, economy is high.
In further embodiments, discharged after being cooled down to a part of gas separated, for example can be to from gas-liquid
It is discharged into air after a part of gas cooling that separator is isolated.
Specifically, a part of liquid that will be separated is used in step S4 and step S8 make the use during moulded coal
Water.For example, a part of liquid that above-mentioned gas-liquid separator separates are gone out is used to make the use water during moulded coal, it is right so as to realize
Water is recycled, without adding other water during moulded coal is made.
Alternatively, the liquid isolated using the liquid separated in step S7 and from gas-liquid mixture is as in step S6
The coolant cooled down to dusty gas.For example, the shower water from spray column outflow can realize solid-liquid in solid-liquid separator
Separate to obtain clarified solution and mud, the gas-liquid mixture isolated from spray column can be separated after gas-liquid separator gas-liquid separation
Go out liquid, clarified solution and liquid can be re-circulated to the coolant in spray column for being cooled down to dusty gas.
In some embodiments of the invention, the lignite after screening is input to air-flow using feeding screw in step S2
Crush in drier.It is simple and reliable.
Alternatively, the dry gas for being used in air-flow crushing drier are inert gas.Such as N2, Ar etc., thus, brown
In coal drying and upgrading drying process, can prevent lignite from spontaneous combustion occurring when drying.Certainly, the dry gas of fluid energy mill are entered
Can also be CO2Deng.
In some embodiments of the invention, the mixed gas discharged from air-flow crushing drier are carried out in step s3
Gas solid separation twice.For example, the mixed gas discharged from air-flow crushing drier can enter gas-solid separating device and in gas-solid
Gas solid separation twice is realized in separator.Specifically, as shown in Figure 3 and Figure 4, gas-solid separating device can be including whirlwind point
From device and deduster, can be first into cyclone separator from the mixed gas of the outlet discharge of air-flow crushing drier, mixed
Close gas carries out first time gas solid separation to obtain fine coal and dusty gas containing a small amount of fine coal, containing a small amount of in cyclone separator
The dusty gas of fine coal then flows in deduster from the outlet of cyclone separator and second gas solid separation is realized in deduster
To obtain fine coal.
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 or can communicate each other；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be with
Be two element internals connection or two interaction relationships of element, unless otherwise clearly restriction.For this area
For those of ordinary skill, above-mentioned term concrete meaning in the present invention can be as the case may be understood.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the invention 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 with office
Combined in an appropriate manner in one or more embodiments or example.Additionally, in the case of not conflicting, the skill of this area
Art personnel can be tied the feature of the different embodiments or example described in this specification and different embodiments or example
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, changes, replacing and modification.
Claims (10)
1. a kind of method of brown coal drying and upgrading, it is characterised in that comprise the following steps：
S1：Lignite raw coal is crushed, is screened；
S2：Lignite after screening is input in air-flow crushing drier carries out broken drying；
S3：Mixed gas to being discharged from the air-flow crushing drier carry out gas solid separation to obtain fine coal and dusty gas,
The fine coal that collection is separated；
S4：Moulded coal is obtained by the fine coal being collected into step S3 is compressing；
S5：The moulded coal is pyrolyzed to obtain upgraded coal, pyrolysis gas and tar.
2. the method for brown coal drying and upgrading according to claim 1, it is characterised in that also included before step S5 as follows
Step：
S6：Coolant is used to cool down the dusty gas separated in the step S3 mixed to obtain shower water and gas-liquid
Compound；
S7：Shower water is carried out separation of solid and liquid to obtain mud；
S8：It is compressing after the mud obtained in step S7 is mixed with the fine coal being collected into step S3 to obtain the type
Coal.
3. the method for brown coal drying and upgrading according to claim 2, it is characterised in that to being separated in the step S6
Gas-liquid mixture gas-liquid separation is carried out to obtain gas and liquid, the liquid that collection is isolated.
4. the method for brown coal drying and upgrading according to claim 3, it is characterised in that at least a portion separated
Gas is heated to obtain recuperated gas, and the recuperated gas are drained into the air-flow crushing drier in the step S2
As the dry gas in the air-flow crushing drier.
5. the method for brown coal drying and upgrading according to claim 3, it is characterised in that to a part of gas separated
Discharged after being cooled down.
6. the method for brown coal drying and upgrading according to claim 3, it is characterised in that a part of liquid that will be separated
Water is used during for making moulded coal in step S4 and step S8.
7. the method for brown coal drying and upgrading according to claim 3, it is characterised in that the liquid that will be separated in step S7
Body and the liquid isolated from the gas-liquid mixture are used as the coolant cooled down to the dusty gas in step S6.
8. the method for brown coal drying and upgrading according to claim 1, it is characterised in that entered using spiral in the step S2
Be input to lignite after screening in the air-flow crushing drier by glassware.
9. the method for brown coal drying and upgrading according to claim 1, it is characterised in that adopted in the air-flow crushing drier
Dry gas are inert gas.
10. the method for brown coal drying and upgrading according to claim 1, it is characterised in that in step s3 to from the gas
The mixed gas that stream crushes drier discharge carry out gas solid separation twice.
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| CN201611060668.0A CN106701232A (en) | 2016-11-25 | 2016-11-25 | Method for drying and upgrading lignite |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107189834A (en) * | 2017-07-10 | 2017-09-22 | 自贡通达机器制造有限公司 | A kind of steam-cured kettle kettle body and steam-cured method |
| CN108444249A (en) * | 2018-04-13 | 2018-08-24 | 李召书 | Two step low temperature drying method of lignite and equipment |
| CN117287716A (en) * | 2023-09-28 | 2023-12-26 | 宁波众茂杭州湾热电有限公司 | Coal crushing particle size control system and method |
-
2016
- 2016-11-25 CN CN201611060668.0A patent/CN106701232A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107189834A (en) * | 2017-07-10 | 2017-09-22 | 自贡通达机器制造有限公司 | A kind of steam-cured kettle kettle body and steam-cured method |
| CN107189834B (en) * | 2017-07-10 | 2023-08-15 | 自贡通达机器制造有限公司 | Steam curing kettle body and steam curing method |
| CN108444249A (en) * | 2018-04-13 | 2018-08-24 | 李召书 | Two step low temperature drying method of lignite and equipment |
| CN108444249B (en) * | 2018-04-13 | 2024-04-23 | 李召书 | Lignite two-step low-temperature drying method and equipment |
| CN117287716A (en) * | 2023-09-28 | 2023-12-26 | 宁波众茂杭州湾热电有限公司 | Coal crushing particle size control system and method |
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