CN103298918A - Low-grade coal slurry production method, low-grade coal slurry production device, and low-grade coal gasification system - Google Patents
Low-grade coal slurry production method, low-grade coal slurry production device, and low-grade coal gasification system Download PDFInfo
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- CN103298918A CN103298918A CN2012800053544A CN201280005354A CN103298918A CN 103298918 A CN103298918 A CN 103298918A CN 2012800053544 A CN2012800053544 A CN 2012800053544A CN 201280005354 A CN201280005354 A CN 201280005354A CN 103298918 A CN103298918 A CN 103298918A
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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
- C10L1/00—Liquid carbonaceous fuels
- C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
- C10L1/326—Coal-water suspensions
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/50—Fuel charging devices
- C10J3/506—Fuel charging devices for entrained flow gasifiers
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0903—Feed preparation
- C10J2300/0906—Physical processes, e.g. shredding, comminuting, chopping, sorting
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0903—Feed preparation
- C10J2300/0909—Drying
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/093—Coal
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/094—Char
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Abstract
The purpose of the present invention is to provide: a production method and production device with which it is easy to produce a low-grade coal slurry having a high slurry concentration and a low viscosity, and which is appropriate for gasification using a pressurized gasification furnace; and a gasification system provided with such a production device. This low-grade coal slurry production method has: a first step for heating and drying coarsely ground low-grade coal, and recovering condensed water emitted from the low-grade coal as steam; and a second step for adding a dispersant and the condensed water obtained during the first step to the heated and dried low-grade coal, and forming a slurry using the wet-grinding method. In addition, this low-grade coal slurry production device has: a drying device for heating and drying the coarsely ground low-grade coal; a condensed water recovery device for recovering condensed water emitted from the low-grade coal as steam through the heating and drying; and a wet-grinding device for adding the condensed water and the dispersant to the heated and dried low-grade coal, and forming a slurry.
Description
Technical field
The present invention relates to the method and apparatus for the slurries that are suitable for the fuel that pressurized-gasification furnace uses with the such low grade coal manufacturing of brown coal.Again, the present invention relates to possess with such slurries is the gasification system of low grade coal of the pressurized-gasification furnace of fuel.
Background technology
In recent years, the consumption of whole world Energy resources enlarges just rapidly and advances, and is constantly soaring as the price of oil, coal or the Sweet natural gas etc. of main energy sources.Therefore, how effectively to use these energy to become major issue.
Coal as general fuel uses except generating efficiency and cost, also from carrying or preserve the angle consideration of the secure context in such logistics, uses the pitch coal of golf calorific value.But, being accompanied by the economic growth of emerging nation, the supply and demand of pitch coal worldwide go short of.
On the other hand, calculate that the reserve with the low grade coal headed by brown coal, inferior brown coal or the inferior pitch coal is the scale of reserve more than 6,000 hundred million tons that surpasses the such high grade coal of pitch coal.But low grade coal is because the water ratio height, therefore with its as generating during with the fuel of boiler etc. thermo-efficiency low, thereby cost of electricity-generating uprises.Again, because brown coal are reactive high, and the danger of spontaneous combustion uprises when making it dry, therefore carries and storage difficulties, almost is not utilized at present.
Again, the carbonic acid gas (CO that causes of coal generating
2) output be in the trend of global sharp increase, it becomes the important factor that causes global greenhouse effect.Because the CO of the per unit thermal value of coal
2Output is more than oil or Sweet natural gas, is therefore reducing CO
2The requiring of output suppressed the use of coal surging the time with the developed country headed by the Japan.
The such low grade coal of brown coal is that price is very cheap, also many promising fuel source of reserve, but because problem as described above, practical situation are that it is not used effectively.Therefore, about near the colliery with brown coal hydrogasification, and utilize the method for the synthesis gas obtain, carry on technical development." synthesis gas " refer to coal or the such hydrocarbon polymer of Sweet natural gas be raw material make contain hydrogen (H
2) and carbon monoxide (CO), carbonic acid gas (CO
2) or the raw gas of methane etc., be for ammonia synthesis, methyl alcohol is synthetic or the general name of the unstripped gas of hydrogen manufacturing etc.
Particularly, near the low grade coal colliery that brown coal are such gasifies, Separation and Recovery CO from the synthesis gas that generates
2After, as no CO
2The method of synthesis gas utilization receive much concern.For example, with brown coal hydrogasification, separation and purification hydrogen from the synthesis gas that obtains is carried its liquefaction back as liquid hydrogen, and as the method that the fuel of internal combustion turbine or gas engine utilizes, and can predict that it will realize in the hydrogen society in future.
About the technology of using coal gasification furnace that pitch coal is gasified, wet pulverization pitch coal and with the liquefaction of its water slurry is supplied with the wet method oxygen blast gas vapourizing furnace of supplying with the pitch coal of water slurry liquefaction in the oxygen and is turned round as business machine in the vapourizing furnace that moves under High Temperature High Pressure.Again, the broken pitch coal of fine powder also turns round as business machine with the gas delivery coal dust and with its method that is supplied to vapourizing furnace.
When using pressurized-gasification furnace that pitch coal is gasified, make pitch coal become slurries if add water and the such additive of dispersion agent in the pitch coal after pulverizing, then operate and conveying becomes easy.Again, because compare the price of per unit heat with heavy oil etc. low, therefore the fuel of oil receives much concern as an alternative.
When coal was supplied with to pressurized-gasification furnace as slurries, Low Viscosity Ratio was easier to operation and carries, but Energy efficiency descends during concentration of slurry (coal concentration) step-down.Particularly, under the situation of the such low grade coal of brown coal because its water ratio height than pitch coal, thus concentration of slurry when reducing Energy efficiency significantly descend.Therefore, seeking the manufacture method of high density and low viscous low grade coal slurries.
At this, patent documentation 1 discloses a kind of method, namely use low grade coal as feed coal, under the preferred apparent viscosity about 1000cP, slurries with the containing ratio height (about 70 weight %) that obtains coal as far as possible are purpose, when mixing dewatered cake, water and dispersion agent, be divided into two stages with mixing, do not add dispersion agent or carry out after adding dispersion agent mixingly with filter cake and water a small amount of under the immobilising degree in the fs, the interpolation dispersion agent further carries out mixing when mixing thing becomes pasty state.
The prior art document
Patent documentation
Patent documentation 1: Japanese kokai publication hei 11-335680 communique.
Summary of the invention
The problem that invention will solve
Brown coal are because water ratio also reaches 30～70%, thereby when further interpolation water makes its water slurry liquefaction, total moisture in the slurries (in the brown coal the inner moisture that contains and as the summation of the moisture of the brown coal outside of the dispersion medium of slurries) becomes high, heats a large amount of in pressurized-gasification furnace are consumed owing to moisture evaporation, and are extremely low thereby Energy efficiency becomes.Therefore, the low grade coal water slurry liquefaction that the brown coal that water ratio is high are such is supplied to the method that gasifies in the pressurized-gasification furnace with it, almost never studies in the past.
Fig. 2 is the summary process picture sheet of the manufacture method of patent documentation 1 disclosed slurries.Even it is hydrophilic brown coal or inferior pitch coal that patent documentation 1 disclosed slurries manufacture method adopts high-hygroscopicity and water ratio height (30～70 weight %) and surface, also can make the high density slurries.
In patent documentation 1(claim 3) in the disclosed slurries manufacture method, in first operation (pulverizing process), in brown coal or inferior pitch coal, add water, pulverize preparation lower concentration slurries (10～40 weight %) by wet method crude.But the incomplete situation of water resource infrastructure is more near the colliery, can predict that to guarantee a large amount of water very difficult.
Secondly, in second operation (modified process), carry out the slurries of modification processing by hot-water cure (pressure is that 12～15MPa, temperature are 250～330 ℃), in the 3rd operation (dehydration procedure), dewater and become dewatered cake.But, because dewatered cake does not have flowability, thereby its operation and difficulty of transportation.Then after the mixing dewatered cake of the 4th operation (the first mixing operation) that it is slurried again, but owing to become and do not have mobile mashed prod, thereby its operation and the conveying difficulty that becomes.Again, in mixing, it is broken to expect that brown coal etc. are carried out fine powder.
In addition, in the 5th operation (the second mixing operation), add dispersion agent and preparation aqueous slurry, but in mixing, be difficult to dispersion agent is disperseed equably.
The object of the present invention is to provide and be suitable for according to the high concentration of slurry of the gasification of pressurized-gasification furnace and the simple preparation process of low viscous low grade coal slurries.
The means of dealing with problems
The inventor intently studies in order to solve the above-mentioned conventional art problem of making the low grade coal slurries.Consequently, found it is not the low grade coal after the outside adds water to pulverizing that it is slurried, if but the water vapour that produces during dehydration by evaporation behind the heat drying low grade coal reclaimed as water of condensation and utilize, then can reduce the moisture that the inside of low grade coal is contained, and increase the moisture as the low grade coal outside of dispersion medium.Again, found by so operation that even under with the situation of low grade coal as feed coal, the total moisture in the slurries is also identical with conventional art, and can access low viscosity and operation and carry and be easy to slurries, thereby finished the present invention.
Specifically, the present invention relates to have: the low grade coal after the coarse reduction is carried out heat drying, and the water vapour that will discharge from low grade coal is as first operation of water of condensation recovery simultaneously; In low grade coal after heat drying is handled, be added on the water of condensation and the dispersion agent that obtain in first operation, the manufacture method of the low grade coal slurries by wet pulverization second operation that low grade coal is slurried.
In first operation, the water that the low grade coal inside after the coarse reduction is contained is discharged as water vapour, thus dry low grade coal.Again, owing to block the fine structure on low grade coal surface by the heating tar ingredients, or surface hydrophilicity functional group becomes hydrophobic functional groups, can expect also that therefore the water of discharging is absorbed again by low grade coal.
At this, low grade coal refers to brown coal, inferior pitch coal, inferior brown coal or their mixing coal, but preferably the present invention is specially adapted to brown coal.
In second operation, behind the low grade coal after the wet pulverization modification is handled that it is slurried, but cool off by being recovered in the water vapour (self drainage water) of from low grade coal, discharging in first operation, and utilize after it is reclaimed as water of condensation, even near the less colliery of water resources, also can prepare the low grade coal slurries.
Preferably, the heat drying of described first operation is handled by the indirect heating below 200 ℃ more than 100 ℃ and is carried out.
Preferably, the water ratio of the low grade coal after described first operation is below the 15 weight %.The water ratio of the low grade coal of herein addressing refers to that the moisture weight that contains low grade coal inside accounts for the per-cent of low grade coal gross weight.
Preferably, the concentration of slurry in described second operation is below the above 65 weight % of 40 weight %.The concentration of slurry of herein addressing refers to the weight percent that calculates with the dry coal base of the low grade coal that is contained in the slurries (weight after moisture content converted as 0 weight %, i.e. dry base (dry basis)).
Preferably, the manufacture method of described low grade coal slurries has after described second operation, and the slurries that obtain are further carried out the 3rd operation that high-speed stirring is handled.Handle by carrying out high-speed stirring, the stability of slurries increases, thereby also can preserve before slurries are supplied to pressurized-gasification furnace.
Preferably, described dispersion agent is polystyrene type dispersion agent, naphthene sulfonic acid class dispersion agent, methacrylic dispersion agent or sulfomethylated lignin acids dispersion agent, and the addition that adds to slurries is with respect to more than the 0.2 weight % of the dry weight of low grade coal below the 2 weight %.
The present invention relates to have: the drying installation that the low grade coal after the coarse reduction is carried out heat drying again; The condensate water recovery device that will reclaim as water of condensation by the water vapour that heat drying is discharged from low grade coal; In low grade coal behind heat drying, add water of condensation and dispersion agent, the manufacturing installation of the low grade coal slurries of the wet pulverization device that low grade coal is slurried.
Preferably, described drying installation is that the device maximization is easy to the indirect heating type drying installation.
Preferably, the manufacturing installation of low grade coal slurries of the present invention also possesses the dry ground device that low grade coal is carried out coarse reduction.
Preferably, the manufacturing installation of low grade coal slurries of the present invention has the whipping appts that the slurries that obtain by described wet pulverization device is further carried out the high-speed stirring processing.
The present invention relates to have: the manufacturing installation of described low grade coal slurries again; The conveying pipe arrangement that the slurries that obtain from described wet pulverization device or described whipping appts are carried; And to the gasification system of the low grade coal of the pressurized-gasification furnace that gasifies by the slurries of carrying pipe arrangement to carry.
Above-mentioned purpose of the present invention, other purposes, feature and advantage on the basis of reference accompanying drawing, can be able to clear and definite from the detailed description of following preferred example.
The invention effect
According to the present invention, can make the high concentration of slurry and the low viscous low grade coal slurries that are suitable for according to the gasification of pressurized-gasification furnace simply.Again, also low grade coal that can be such to the brown coal that almost were not used effectively in the past uses pressurized-gasification furnace to gasify expeditiously.
Description of drawings
Fig. 1 is the summary construction diagram that illustrates for an example of the device of the manufacture method of implementing low grade coal slurries of the present invention;
Fig. 2 is the summary process picture sheet of the manufacture method of patent documentation 1 disclosed low grade coal slurries.
Embodiment
Below, explain the present invention.In addition, the invention is not restricted to following record.
Fig. 1 is the summary construction diagram that illustrates for an example of the device of the manufacture method of implementing low grade coal slurries of the present invention.At first, low grade coal is by 1 coarse reduction of dry ground device.At this moment, preferably, low grade coal is that granularity is that particle (be the particle of the sieve of 3mm by mesh size) below the 3mm is more than the 70 weight % by coarse reduction, and preferably granularity is that the following particle of 3mm is more than the 90 weight %.
Then, the low grade coal after the coarse reduction is supplied to indirect heating type drying installation 2, thereby is dried.As indirect heating type drying installation 2, for example, can use vapour pipe drying machine (steam tube dryer), single shaft indirect heating type drying machine or twin shaft indirect heating type drying machine.Preferably, the heat drying condition is that temperature is more than 100 ℃ below 200 ℃.By carry out drying under such temperature condition, granularity is almost constant, but the moisture that low grade coal inside is contained is discharged (dehydration by evaporation) as water vapour to the outside.
Preferably, low grade coal is by indirect heating type drying installation 2, and being dried to moisture content is below the 15 weight %, preferably below the 10 weight %.Again, according to heating condition, because the coking coal composition blocks the fine structure on low grade coal surface, the moisture after therefore discharging becomes and is difficult to be absorbed again by low grade coal, and can expect that the hydrophobicity on low grade coal surface also increases.Through transfer roller 4, be supplied to wet pulverization device 5 with indirect heating type drying installation 2 dried low grade coals.
On the other hand, the water vapour of discharging from the low grade coal after the coarse reduction in indirect heating type drying installation 2 cools off after being supplied to condensate water recovery device 3, is recovered as water of condensation.All or part of of water of condensation after the recovery and dispersion agent also are supplied to wet pulverization device 5.Then, by wet pulverization device 5, the broken low grade coal of fine powder, thereby preparation low grade coal slurries.
As condensate water recovery device 3, for example, can use air-cooled condenser or water-cooled condenser.As wet pulverization device 5, for example, can use ball mill by wet process or medium stirring-type pulverizer.In addition, remaining water of condensation can be discarded, and also can be used for any other purposes.
Preferably, adjusting is supplied to the water yield of wet pulverization device 5, so that the low grade coal concentration of slurry is calculated as the concentration of the scope of 40～65 weight % with dry coal base (dry basis), only under the situation of water shortage, adding the water of aequum with the water of condensation after reclaiming with additive method.Again, preferably, the broken low grade coal slurries of fine powder account for 30～90% of low grade coal particle integral body so that particle diameter is the following low grade coal particle (by 200 purpose low grade coal particles) of 74 μ m.
As dispersion agent, can use polystyrene type dispersion agent, naphthene sulfonic acid class dispersion agent, methacrylic dispersion agent or sulfomethylated lignin acids dispersion agent.Preferably, add dispersion agent, so that its concentration in the low grade coal slurries is for more than the 0.2 weight % of the dry weight of the low grade coal that contains in respect to the low grade coal slurries below the 2 weight %.
Except dispersion agent, by in the low grade coal slurries, adding such stablizer and/or the such thickening material of xanthan gum of carboxymethyl cellulose, also can further improve the stability of slurries.Preferably, regulate stablizer or thickening material, so that its concentration in the low grade coal slurries is 0.001～0.05 weight %.
The low grade coal slurries that obtain by the present invention, even its total moisture is identical with in the past low grade coal slurries, but the moisture that low grade coal inside is contained is less, and is more as the amount of the water of dispersion medium.Therefore, be in a ratio of high density and low viscosity with in the past low grade coal slurries, have the physical properties that is suitable for according to the gasification of pressurized-gasification furnace.
In the present invention, when carrying out behind the low grade coal after mixing water and the coarse reduction when slurried, owing to also add dispersion agent simultaneously, and therefore different with patent documentation 1 disclosed method, dispersion agent can be scattered in the slurries equably.
As patent documentation 1, under the situation of wet pulverization lower concentration slurries, form the less size-grade distribution of micropartical.With respect to this, in the present invention, because the very high low-grade Mei – water mixture of wet pulverization concentration, so the low grade coal behind the wet pulverization forms the more desirable size-grade distribution of micropartical.
Preserve in slurry tank 6 by the low grade coal slurries that wet pulverization device 5 obtains.Preferably, the low grade coal slurries in the slurry tank 6 are in advance by stirrer 7(low-speed mixer) stir.By possess the conveying pipe arrangement 9 carried with pump 8, this low grade coal slurries from slurry tank 6 be supplied to whipping appts 10 thereafter.By using whipping appts 10(homogenizer) the low grade coal slurries are carried out the high-speed stirring processing, can increase the stability of low grade coal slurries, thereby can prevent that low grade coal from separating.
As whipping appts 10, can use the tempering tank of line mixer (line mixer) or band homogenizer.Under the situation of using line mixer, preferably rotating speed is 500～5000rpm, and the residence time of low grade coal slurries is 10 seconds～2 minutes.Low grade coal slurries (finished product slurries) after high-speed stirring is handled are supplied to pressurized-gasification furnace by possessing the conveying pipe arrangement of carrying with pump 12 13.
In addition, whipping appts 10 is arbitrary structures, in that the low grade coal slurries in the slurry tank 6 are supplied under the such situation of pressurized-gasification furnace immediately, also whipping appts can be set.At this moment, the low grade coal slurries are supplied to pressurized-gasification furnace by carrying pipe arrangement 9 from slurry tank 6.
Be supplied to the low grade coal slurries of pressurized-gasification furnace (the coal pressurized-gasification furnace of wet method coal supply mode), be vaporized at this place, be transformed to synthesis gas.The synthesis gas that obtains is separation of C O or CO as required
2Such impurity, refining is hydrogen.Preferably, to the CO after separating
2Carry out immobilization.Again, preferably, the CO after the separation is oxidized to CO
2Immobilization is carried out to it in the back.Like this, the formation system that will in pressurized-gasification furnace, gasify as the low grade coal of raw material.
[embodiment]
(first operation)
Using the brown coal (brown coal (Loy Yang brown coal) are produced in Australia) of the proterties shown in the hammer mill his-and-hers watches 1 to carry out coarse reduction, is 90 weight % above (particle that is the sieve of 3mm is more than the 90 weight % of brown coal integral body) by mesh size so that granularity is the following particle of 3mm.Brown coal after the coarse reduction are fed into indirect heating type drying machine (Kawasaki Heavy Industries make small steam pipe drying machine), and under 0.1MPa, 180 ℃ condition dry one hour, obtaining total moisture was the dry brown coal of 10 weight %.The water vapour of discharging from the indirect heating type drying machine cools off by water-cooled condenser, reclaims as water of condensation.
[table 1]
(second operation)
After in the dry brown coal of 3kg, adding water of condensation and polystyrene type dispersion agent, it is fed into ball mill by wet process (φ 300mm * L300mm, volume are about 21L).Regulate the addition of water of condensation, so that water of condensation is 49 weight % with respect to the gross weight of brown coal (dry coal base), water of condensation and polystyrene.Again, interpolation is with respect to the polystyrene type dispersion agent of dry brown coal 0.7 weight %.
Water of condensation and the polystyrene type dispersion agent that is fed in the ball mill by wet process carried out the batch-type pulverizing, and obtaining by 200 purpose brown coal is the brown coal slurries of 85 weight % of brown coal integral body.The concentration of these brown coal slurries is calculated as 50 weight % with the dry coal base, and apparent viscosity is 100sec in velocity of shear
-1, temperature is to be 1.8Pas(1800cP under 25 ℃ the condition).Again, with these brown coal slurries in internal volume is the polythene container of 500mL in leaving standstill (room temperature) under the room temperature after 7 days, the brown coal sinkability is about 10 capacity %.
(the 3rd operation)
50 brown coal slurries of obtaining in above-mentioned second operation are further used homogenizer, and (Spectrum Lai Mikesi Co., Ltd. (PRIMIX Corporation) makes, T.K HOMO MIXER MARK II 2.5 types), handled one minute with the 1000rpm high-speed stirring.The apparent viscosity of the brown coal slurries after high-speed stirring is handled is 100sec in velocity of shear
-1, temperature is to be 1.2Pas(1200cP under 25 ℃ the condition).In leaving standstill (room temperature) under the room temperature after 7 days, the brown coal sinkability is about 7 capacity % to brown coal slurries after high-speed stirring handled in internal volume is the polythene container of 500mL.Like this, the brown coal slurries of having confirmed to obtain in second operation are by further carrying out the high-speed stirring processing, and stability increases.
According to the above description, to those skilled in the art, many improvement of the present invention and other examples are apparent.Therefore, above-mentioned explanation explains as just example, and to implement most preferred form of the present invention be that purpose provides to instruct to those skilled in the art.Without departing from the spirit of the present invention, the particular content of its structure and/or function can have material alteration.
Industrial applicability
The manufacturing installation of the manufacture method of low grade coal slurries of the present invention, low grade coal slurries and the gasification system of low grade coal are useful at fuel or energy field.
Nomenclature
1: the dry ground device;
2: the indirect heating type drying installation;
3: condensate water recovery device (condenser);
4: transfer roller;
5: the wet pulverization device;
6: slurry tank;
7: stirrer (low-speed mixer);
8,12: carry and use pump;
9,13: carry pipe arrangement;
10: whipping appts (homogenizer);
11: motor.
Claims (11)
1. the manufacture method of low grade coal slurries is characterized in that, the manufacture method of described low grade coal slurries has:
Low grade coal after the coarse reduction is carried out heat drying, and the water vapour that will discharge from low grade coal is as first operation of water of condensation recovery simultaneously; With
In the low grade coal after heat drying is handled, be added on the water of condensation and the dispersion agent that obtain in first operation, by wet pulverization second operation that low grade coal is slurried.
2. the manufacture method of low grade coal slurries according to claim 1 is characterized in that, the heat drying of described first operation is handled by the indirect heating below 200 ℃ more than 100 ℃ and carried out.
3. the manufacture method of low grade coal slurries according to claim 1 is characterized in that, the water ratio of the low grade coal after described first operation is below the 15 weight %.
4. the manufacture method of low grade coal slurries according to claim 1 is characterized in that, the concentration of slurry in described second operation is below the above 65 weight % of 40 weight %.
5. the manufacture method of low grade coal slurries according to claim 1 is characterized in that,
Described dispersion agent is polystyrene type dispersion agent, naphthene sulfonic acid class dispersion agent, methacrylic dispersion agent or sulfomethylated lignin acids dispersion agent,
The addition that described dispersion agent adds to slurries is with respect to more than the 0.2 weight % of the dry weight of low grade coal below the 2 weight %.
6. according to the manufacture method of any described low grade coal slurries in the claim 1 to 5, it is characterized in that the manufacture method of described low grade coal slurries has after described second operation, the slurries that obtain are carried out the 3rd operation that high-speed stirring is handled.
7. the manufacturing installation of low grade coal slurries is characterized in that, the manufacturing installation of described low grade coal slurries has:
Low grade coal after the coarse reduction is carried out the drying installation of heat drying;
The condensate water recovery device that will reclaim as water of condensation by the water vapour that heat drying is discharged from low grade coal; With
In the low grade coal behind heat drying, add water of condensation and dispersion agent, the wet pulverization device that low grade coal is slurried.
8. the manufacturing installation of low grade coal slurries according to claim 7 is characterized in that, described drying installation is the indirect heating type drying installation.
9. the manufacturing installation of low grade coal slurries according to claim 7 is characterized in that, the manufacturing installation of described low grade coal slurries also possesses the dry ground device that low grade coal is carried out coarse reduction.
10. the manufacturing installation of low grade coal slurries according to claim 7 is characterized in that, the manufacturing installation of described low grade coal slurries has the whipping appts that the slurries that obtain by described wet pulverization device is further carried out the high-speed stirring processing.
11. the gasification system of a low grade coal is characterized in that, the gasification system of described low grade coal has:
The manufacturing installation of the described low grade coal slurries of claim 7;
The conveying pipe arrangement that the slurries that obtain from described wet pulverization device or described whipping appts are carried; With
To the pressurized-gasification furnace that gasifies by the slurries of carrying pipe arrangement to carry.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-012154 | 2011-01-24 | ||
| JP2011012154A JP6134088B2 (en) | 2011-01-24 | 2011-01-24 | Gasification method for low-grade coal slurry and gasification system for low-grade coal |
| PCT/JP2012/000103 WO2012101964A1 (en) | 2011-01-24 | 2012-01-11 | Low-grade coal slurry production method, low-grade coal slurry production device, and low-grade coal gasification system |
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| CN103298918A true CN103298918A (en) | 2013-09-11 |
| CN103298918B CN103298918B (en) | 2016-01-13 |
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Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6134088B2 (en) |
| CN (1) | CN103298918B (en) |
| AU (1) | AU2012210131B2 (en) |
| WO (1) | WO2012101964A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104371779A (en) * | 2014-11-18 | 2015-02-25 | 中国五环工程有限公司 | Method and system for preparing high-concentration water-coal-slurry employing low-rank coal |
| CN104449917A (en) * | 2014-11-18 | 2015-03-25 | 中国五环工程有限公司 | Method for preparing high-concentration coal-water slurry from lignite through low-temperature upgrading |
| CN104449918A (en) * | 2014-11-18 | 2015-03-25 | 中国五环工程有限公司 | Method for preparing high-concentration coal-water slurry from lignite through high-temperature upgrading |
| CN104449916A (en) * | 2014-11-18 | 2015-03-25 | 中国五环工程有限公司 | Method for preparing high-concentration coal-water slurry from lignite through medium-temperature upgrading |
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| US9404055B2 (en) | 2013-01-31 | 2016-08-02 | General Electric Company | System and method for the preparation of coal water slurries |
| CN105695011B (en) * | 2016-03-16 | 2017-12-12 | 中国石油大学(华东) | One kind gasification auxiliary pulping system and its application method |
| CN108795522B (en) * | 2018-06-23 | 2021-12-03 | 台州泰捷化工科技有限公司 | Coal water slurry additive and preparation method thereof |
| CN108795517B (en) * | 2018-06-23 | 2021-11-09 | 泉州市联政信息科技有限公司 | High-molecular coal water slurry additive and preparation method thereof |
| CN108865304B (en) * | 2018-06-23 | 2021-04-30 | 佛山市天亿化工有限公司 | Amide group-containing coal water slurry additive and preparation method thereof |
| KR20230067743A (en) * | 2021-11-08 | 2023-05-17 | 주식회사 선진티에스 | Combined system of coal-gasifier and blast-furnace using water-free coal and method using the same |
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| CN104371779A (en) * | 2014-11-18 | 2015-02-25 | 中国五环工程有限公司 | Method and system for preparing high-concentration water-coal-slurry employing low-rank coal |
| CN104449917A (en) * | 2014-11-18 | 2015-03-25 | 中国五环工程有限公司 | Method for preparing high-concentration coal-water slurry from lignite through low-temperature upgrading |
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| CN104449916A (en) * | 2014-11-18 | 2015-03-25 | 中国五环工程有限公司 | Method for preparing high-concentration coal-water slurry from lignite through medium-temperature upgrading |
| CN104449917B (en) * | 2014-11-18 | 2016-04-13 | 中国五环工程有限公司 | High-concentration coal-water slurry method is prepared in the upgrading of brown coal low temperature |
| CN104449916B (en) * | 2014-11-18 | 2016-04-13 | 中国五环工程有限公司 | In brown coal, high-concentration coal-water slurry method is prepared in warm upgrading |
| CN104449918B (en) * | 2014-11-18 | 2016-04-27 | 中国五环工程有限公司 | High-concentration coal-water slurry method is prepared in the upgrading of brown coal high temperature |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2012153761A (en) | 2012-08-16 |
| CN103298918B (en) | 2016-01-13 |
| JP6134088B2 (en) | 2017-05-24 |
| AU2012210131A1 (en) | 2013-08-15 |
| WO2012101964A1 (en) | 2012-08-02 |
| AU2012210131B2 (en) | 2016-04-21 |
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