CN107164005A - A kind of water-coal-slurry and preparation method thereof - Google Patents
A kind of water-coal-slurry and preparation method thereof Download PDFInfo
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- CN107164005A CN107164005A CN201710481199.8A CN201710481199A CN107164005A CN 107164005 A CN107164005 A CN 107164005A CN 201710481199 A CN201710481199 A CN 201710481199A CN 107164005 A CN107164005 A CN 107164005A
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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
- 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
- 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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Abstract
The present invention relates to a kind of preparation method of water-coal-slurry, comprise the following steps：(1) feed coal is crushed, obtains coal dust；Part coal dust is mixed with additive and water, the first slurry is obtained, remaining coal dust is mixed with additive and water, the second slurry is obtained；(2) by the second slurry shaping fine grinding, the 3rd slurry is obtained, the first slurry is mixed into progress shaping corase grind with the slurry of part the 3rd obtains the 4th slurry；(3) the 4th slurry is mixed into progress high shear with remaining 3rd slurry, obtains the 5th slurry；The output of (4) the 5th slurries obtains water-coal-slurry.Water-coal-slurry average grain diameter obtained by this continous way production technology is 30~80 μm and grain size distribution is reasonable, can effectively fill space, improves deposition efficiency, and slurry concentration significantly reduces the energy consumption and production cost of slurrying up to more than 62.2wt%.
Description
Technical field
The present invention relates to technical field of coal chemical industry, it is related to a kind of water-coal-slurry and preparation method thereof.
Background technology
Water-coal-slurry is a kind of novel coal base fluid fuel, is that the new high-tech product and Key Environmental Protection of country promote product.
It is mixed and processed by a certain proportion of coal, water, chemical addition agent, good with concentration height, fine size, rheological characteristic, burning
Efficiency high, load regulation range is big, environmental protection and energy saving, it is safe and efficient the advantages of.It is current one real clean coal technology of China.
Water-coal-slurry is the coal new product developed after late 1970s world oil crisis, is that one kind can be with
Instead of heavy oil and the novel clean fuel of coal.Water-coal-slurry is in various commercial Applications, and efficiency of combustion reaches more than 99%, is burning
One times of coal is dissipated, close to or up fuel oil level；General two tons of water-coal-slurry can replace one ton of heavy oil, can be in Industrial Boiler, power station
The generation oil such as boiler and Industrial Stoves or coal, gas are used.The cleaned coal after dressing of coal by washing is used to prepare due to water-coal-slurry, content of ashes is small
In 7%, sulphur content content is less than 0.5%, therefore uses water-coal-slurry environmental quality better than combustion heavy oil.2 months 2003, Beijing environmental protection prison
Monitoring of the measured center to my mineral water Slurry Combustion situation is proved：The later smoke dust discharge concentration of dedusting is 39mg/m3, SO2Discharge is dense
Spend for 58mg/m3, flame kernel temperature is lower than fuel oil and burning coal powder 150~200 DEG C during due to cool water mixture burning, can effectively suppress
NOxGeneration, therefore NOxDischarge to be less than fuel oil and burning coal powder.Water-coal-slurry is also free from environmental pollution in storage, transportation,
It is nonflammable, non-explosive during storage, fortune, it is safe and reliable.
CN101173765B discloses a kind of method that utilization low-order coal prepares high-concentration coal-water slurry, and methods described passes through super
Fine crushing, it is broken after coal grain press 6~8 with water:4~2 mass ratio mixing, wet type rough lapping, wet type fine lapping, filtering,
High-concentration coal-water slurry product is obtained after high-speed stirred, standing, or stirring at low speed.
CN105154154A discloses a kind of preparation method of ultra-thin slurries, and methods described comprises the following steps：(1) will
Coal raw material is crushed to below 13mm, obtains the first slurry；(2) by the first slurry and water in mass ratio 5~85：15~95 mixing,
Obtain the second slurry；(3) the second slurry wet method shaping fine grinding is obtained into the 3rd slurry, the 3rd slurry particle diameter is less than 1mm, small
More than the 80% of total material is accounted in 45 μm of materials；(4) by the 3rd slurry screen cloth removal of impurities, it is ultra-fine water coal to remove after debris
Slurry.
But, above-mentioned water coal slurry concentration and deposition efficiency need further raising, to be preferably applied to fuel water coal
Slurry and gasified coal water slurry.
The content of the invention
In view of problems of the prior art, it is an object of the invention to provide a kind of new high-concentration coal-water slurry system
Preparation Method, methods described can effectively improve the concentration and deposition efficiency of water-coal-slurry, and obtained particle-size distribution of coal-water slurry is equal
Even, gasification efficiency is high, and energy consumption is low, can be used as fuel coal water slurry or gasified coal water slurry.
For up to this purpose, the present invention uses following technical scheme：
On the one hand, comprise the following steps the invention provides a kind of preparation method of water-coal-slurry：
(1) feed coal is crushed, obtains coal dust；Part coal dust is mixed with additive and water, the first slurry is obtained, will be surplus
Remaining coal dust is mixed with additive and water, obtains the second slurry；
(2) by the second slurry shaping fine grinding, the 3rd slurry is obtained, it is whole that the first slurry is mixed into progress with the slurry of part the 3rd
Shape corase grind obtains the 4th slurry；
(3) the 4th slurry is mixed into progress high shear with remaining 3rd slurry, obtains the 5th slurry；
The output of (4) the 5th slurries obtains water-coal-slurry.
In preparation method of the present invention, after raw coal is broken bidirectional feed can be controlled in actual production charging when
Between；Shaping corase grind and shaping fine grinding can efficiently control the granularity of coal respectively, and shaping corase grind mixing is returned after shaping fine grinding, is made
It more efficiently saves space, effectively fills stackeding space.
The particle diameter of step (1) the of the present invention coal dust is preferably smaller than 5mm, such as 0.1mm, 0.2mm, 0.5mm, 0.8mm,
1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm or 4.9mm etc., preferably 1~4mm.
The mass ratio of the part coal dust, water and additive is preferably (70~90) when the present invention prepares the first slurry:(10
~30):(0.1~1), such as 70:10:0.1、70:30:1、80:20:0.5、85:15:0.6、90:10:0.1 or 90:30:1
Deng preferably (75~85):(15~25):(0.3~0.8).
Preferably, step (1) prepare the second slurry when the remaining coal dust, water and additive mass ratio for (70~
90):(10~30):(0.1~0.5), such as 70:10:0.1、70:30:0.5、80:20:0.3、85:15:0.4、90:10:0.2
Or 90:30:0.5 etc., preferably (75~85):(15~25):(0.1~0.3).
Preferably, step (1) described additive is in lignosulfonates, humate and naphthalene sulfonic acid-formaldehyde condensation product
Any one or at least two combination, wherein typical but non-limiting be combined as：Lignosulfonates and humate
Combination, the combination of humate and naphthalene sulfonic acid-formaldehyde condensation product, the combination of lignosulfonates and naphthalene sulfonic acid-formaldehyde condensation product,
The combination of lignosulfonates, humate and naphthalene sulfonic acid-formaldehyde condensation product.
Step (2) the part coal dust of the present invention preferably accounts for the 60~99% of the coal dust gross mass, such as 60%,
62%th, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 98% or 99% etc., preferably 65~99%.The present invention passes through
Selection carries out fine grinding and the coal dust ratio of corase grind reaches suitable grain size distribution so that fine grained is sufficient filling between coarse granule
Space, improves deposition efficiency.
Preferably, step (2) slurry of part the 3rd accounts for the 5~40% of the 3rd slurry gross mass, such as 5%,
10%th, 15%, 20%, 25%, 30%, 35%, 38%, 39% or 40% etc., preferably 5~30%.
The particle diameter of step (2) the 3rd slurry of the present invention is preferably 5~20 μm, such as 5 μm, 8 μm, 10 μm, 12 μm, 15
μm, 18 μm or 20 μm etc., preferably 8~20 μm.
Preferably, the particle diameter of step (2) the 4th slurry be 35~90 μm, such as 35 μm, 38 μm, 40 μm, 45 μm, 50
μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, 85 μm or 90 μm etc., preferably 40~85 μm.Fine grinding product and corase grind product
Particle diameter between there is synergy, finally make it that particle is tightly packed, stable water-coal-slurry product can be formed.
The speed of step (3) the of the present invention high shear is preferably 80~150r/min, such as 80r/min, 85r/min,
90r/min、95r/min、100r/min、105r/min、110r/min、115r/min、120r/min、125r/min、130r/
Min, 135r/min, 140r/min, 145r/min or 150r/min etc., preferably 80~130r/min.
Preferably, 5~40wt% return to step (2) of step (3) the 5th slurry of the present invention carries out shaping fine grinding.Enter
One step increases deposition efficiency, optimizes grain size distribution effect.
As currently preferred technical scheme, methods described comprises the following steps：
(1) feed coal is crushed, the coal dust that particle diameter is less than 5mm is obtained, by 60~99wt% coal dust and water and additive
It is (70~90) according to mass ratio:(10~30):(0.1~1) mix, obtain the first slurry；By remaining coal dust and additive
With water according to mass ratio be (70~90):(10~30):(0.1~0.5) mix, obtain the second slurry；The additive is selected from
In lignosulfonates, humate and naphthalene sulfonic acid-formaldehyde condensation product any one or at least two combination；
(2) by the second slurry shaping fine grinding, obtain the 3rd slurry, particle diameter is 5~20 μm, by the first slurry and 5~
40wt% the 3rd slurry mixing carries out shaping corase grind and obtains the 4th slurry, and particle diameter is 35~90 μm；
(3) the 4th slurry is mixed with remaining 3rd slurry, high shear is carried out with 80~150r/min speed, obtained
5th slurry；5~40wt% the 5th slurry return to step (2) carries out shaping fine grinding；
(4) remaining 5th slurry output obtains water-coal-slurry.
The concentration of step (4) the of the present invention water-coal-slurry is preferably greater than 62.2wt%, 62.5wt%, 62.8wt%,
63wt%, 63.5wt%, 64wt%, 64.5wt%, 65wt%, 65.5wt%, 66wt%, 66.5wt%, 67wt%,
68wt%, 69wt%, 70wt%, 71wt%, 72wt%, 73wt%, 74wt%, 75wt% or 76wt% etc..
Preferably, the average grain diameter of step (4) described water-coal-slurry be 30~80 μm, such as 30 μm, 35 μm, 40 μm, 45 μm,
50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm or 80 μm etc., preferably 30~70 μm.
Second aspect, the invention provides water-coal-slurry prepared by preparation method as described in relation to the first aspect.
Compared with prior art, the present invention at least has the advantages that：
(1) method for producing water coal slurry that the present invention is provided is using the broken rear bidirectional feed of raw coal, respectively shaping corase grind, shaping
Fine grinding is mutually cooperateed with high shear, and gained water-coal-slurry average grain diameter is 30~80 μm and grain size distribution is reasonable, can effectively fill
Space, improves deposition efficiency, and slurry concentration significantly reduces the energy consumption of slurrying up to more than 62.2wt%；
(2) slurry fractions after its shaping fine grinding return the remaining directly high shear of shaping corase grind process have efficiency high,
The characteristics of convenient control of granularity, small equipment volume and low energy consumption, the production cost of water-coal-slurry can be significantly reduced；
(3) method for producing water coal slurry that the present invention is provided is continous way production technology, and it is gentle that satisfaction prepares fuel coal water slurry
Change water-coal-slurry it is continuous, stably, the production requirement of low consumption.
Brief description of the drawings
Fig. 1 is the process chart of method for producing water coal slurry of the present invention.
Embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by embodiment.
Shenfu coal used is a kind of common low-order coal in In Shanxi Area in embodiment, contains analysis water 5.9%, Quan Shui
12.8%, ash content 19.9%.Yulin coal is a kind of common low-order coal in In Shanxi Area, contains analysis water 6.3%, Quan Shui
10.9%, ash content 12.9%.
Embodiment 1
A kind of water-coal-slurry, it is made by the steps：
1) shenfu coal is crushed, obtains the coal dust that particle diameter is less than 5mm, 60wt% coal dust and water and naphthalenesulfonateformaldehyde formaldehyde are contracted
Compound is 70 according to mass ratio:30:0.1 mixing, obtains the first slurry；By remaining coal dust and naphthalene sulfonic acid-formaldehyde condensation product and water
It is 90 according to mass ratio:10:0.5 mixing, obtains the second slurry；
2) by the second slurry shaping fine grinding, the 3rd slurry is obtained, particle diameter is 16~20 μm, by the first slurry and 5wt%
The mixing of 3rd slurry carries out shaping corase grind and obtains the 4th slurry, and particle diameter is 75~90 μm；
3) the 4th slurry is mixed with remaining 3rd slurry, high shear is carried out with 80r/min speed, the 5th slurry is obtained
Material；
4) the 5th slurry output obtains water-coal-slurry.
The concentration of the water-coal-slurry obtained after process stabilizing is 63.2wt%, and average grain diameter is 40 μm, and 30~80 μm of materials are accounted for
More than the 75% of total material, viscosity is 1089mPas, is had good stability, and syneresis rate is 3% after standing 48 hours.
Embodiment 2
A kind of water-coal-slurry, it is made by the steps：
1) Yulin coal is crushed, the coal dust that particle diameter is less than 5mm is obtained, by 99wt% coal dust and water and humate
It is 90 according to mass ratio:10:1 mixing, obtains the first slurry；By remaining coal dust and naphthalene sulfonic acid-formaldehyde condensation product and water according to matter
Amount is than being 70:30:1 mixing, obtains the second slurry；
2) by the second slurry shaping fine grinding, the 3rd slurry is obtained, particle diameter is 5~10 μm, by the first slurry and 40wt%
The mixing of 3rd slurry carries out shaping corase grind and obtains the 4th slurry, and particle diameter is 35~50 μm；
3) the 4th slurry is mixed with remaining 3rd slurry, high shear is carried out with 150r/min speed, the 5th is obtained
Slurry；5wt% the 5th slurry return to step 2) carry out shaping fine grinding；
4) remaining 5th slurry output obtains water-coal-slurry.
The concentration of the water-coal-slurry obtained after process stabilizing is 62.9wt%, and average grain diameter is 40 μm, and 30~80 μm of materials are accounted for
More than the 75% of total material, viscosity is 1120mPas, is had good stability, and syneresis rate is 3% after standing 48 hours.
Embodiment 3
A kind of water-coal-slurry, it is made by the steps：
1) shenfu coal is crushed, the coal dust that particle diameter is less than 5mm is obtained, by 60wt% coal dust and water and lignosulfonates
It is 75 according to mass ratio:25:0.5 mixing, obtains the first slurry；By remaining coal dust and lignosulfonates and water according to quality
Than for 70:30:0.5 mixing, obtains the second slurry；
2) by the second slurry shaping fine grinding, the 3rd slurry is obtained, particle diameter is 10~15 μm, by the first slurry and 30wt%
The mixing of 3rd slurry carries out shaping corase grind and obtains the 4th slurry, and particle diameter is 50~60 μm；
3) the 4th slurry is mixed with remaining 3rd slurry, high shear is carried out with 100r/min speed, the 5th is obtained
Slurry；40wt% the 5th slurry return to step 2) carry out shaping fine grinding；
4) remaining 5th slurry output obtains water-coal-slurry.
The concentration of the water-coal-slurry obtained after process stabilizing is 63.9wt%, and average grain diameter is 40 μm, and 30~80 μm of materials are accounted for
More than the 75% of total material, viscosity is 1021mPas, is had good stability, and syneresis rate is 3% after standing 48 hours.
Embodiment 4
A kind of water-coal-slurry, it is made by the steps：
1) Yulin coal is crushed, the coal dust that particle diameter is less than 5mm is obtained, by 80wt% coal dust and water and humate
It is 80 according to mass ratio:20:0.3 mixing, obtains the first slurry；It is according to mass ratio with humate and water by remaining coal dust
75:25:0.3 mixing, obtains the second slurry；
2) by the second slurry shaping fine grinding, the 3rd slurry is obtained, particle diameter is 13~18 μm, by the first slurry and 20wt%
The mixing of 3rd slurry carries out shaping corase grind and obtains the 4th slurry, and particle diameter is 60~70 μm；
3) the 4th slurry is mixed with remaining 3rd slurry, high shear is carried out with 120r/min speed, the 5th is obtained
Slurry；5wt% the 5th slurry return to step 2) carry out shaping fine grinding；
4) remaining 5th slurry output obtains water-coal-slurry.
The concentration of the water-coal-slurry obtained after process stabilizing is 69.2wt%, and average grain diameter is 70 μm, and 30~80 μm of materials are accounted for
More than the 75% of total material, viscosity is 1009mPas, is had good stability, and syneresis rate is 3% after standing 48 hours.
Embodiment 5
A kind of water-coal-slurry, it is made by the steps：
1) shenfu coal is crushed, obtains the coal dust that particle diameter is less than 5mm, by 90wt% coal dust and water and humate according to
Mass ratio is 80:20:0.5 mixing, obtains the first slurry；According to mass ratio it is 82 by remaining coal dust and humate and water:
28:0.3 mixing, obtains the second slurry；
2) by the second slurry shaping fine grinding, the 3rd slurry is obtained, particle diameter is 13~16 μm, by the first slurry and 25wt%
The mixing of 3rd slurry carries out shaping corase grind and obtains the 4th slurry, and particle diameter is 60~65 μm；
3) the 4th slurry is mixed with remaining 3rd slurry, high shear is carried out with 120r/min speed, the 5th is obtained
Slurry；20wt% the 5th slurry return to step 2) carry out shaping fine grinding；
4) remaining 5th slurry output obtains water-coal-slurry.
The concentration of the water-coal-slurry obtained after process stabilizing is 75wt%, and average grain diameter is 66 μm, and 30~80 μm of materials are accounted for always
More than the 75% of material, viscosity is 1108mPas, is had good stability, and syneresis rate is 3% after standing 48 hours.
Comparative example 1
With differing only in for embodiment 3：First slurry all carries out shaping corase grind, and saves shaping fine grinding.Specially：
1) shenfu coal is crushed, obtains the coal dust that particle diameter is less than 5mm, be according to mass ratio with water and lignosulfonates
75:25:0.5 mixing, obtains the first slurry；
2) the first slurry shaping corase grind is obtained into the 3rd slurry, particle diameter is 50~60 μm；
3) the 3rd slurry is subjected to high shear with 100r/min speed, obtains the 4th slurry；
4) the 4th slurry output obtains water-coal-slurry.
The concentration of the water-coal-slurry obtained after process stabilizing is 62.8wt%, and average grain diameter is 85 μm, and 30~80 μm of materials are accounted for
More than the 35% of total material, viscosity is 1198mPas, and stability is poor, and syneresis rate is more than 5% after standing 48 hours.
Comparative example 2
With differing only in for embodiment 3：First slurry all carries out shaping fine grinding, and saves shaping corase grind.Specially：
1) shenfu coal is crushed, obtains the coal dust that particle diameter is less than 5mm, be according to mass ratio with water and lignosulfonates
75:25:0.5 mixing, obtains the first slurry；
2) the first slurry shaping fine grinding is obtained into the 3rd slurry, particle diameter is 10~15 μm,；
3) the 3rd slurry is subjected to high shear with 100r/min speed, obtains the 4th slurry；
4) the 4th slurry output obtains water-coal-slurry.
The concentration of the water-coal-slurry obtained after process stabilizing is 63.5wt%, and average grain diameter is 50 μm, and 30~80 μm of materials are accounted for
More than the 72% of total material, viscosity is 1002mPas, and stability is general, stands 48 hours syneresis rates and is more than 5%.
Comparative example 3
With differing only in for embodiment 3：Second slurry all carry out shaping corase grind and without high shear.Specially：
1) shenfu coal is crushed, obtains the coal dust that particle diameter is less than 5mm, be according to mass ratio with water and lignosulfonates
75:25:0.5 mixing, obtains the first slurry；
2) by 40wt% the first slurry shaping fine grinding, obtain the second slurry, particle diameter is 10~15 μm, by the second slurry with
Remaining first slurry mixing carries out shaping corase grind and obtains the 3rd slurry, and particle diameter is 50~60 μm；
3) the 3rd slurry is subjected to high shear with 100r/min speed, obtains the 4th slurry；40wt% the 4th slurry
Return to step 2) carry out shaping fine grinding；
4) remaining 4th slurry output obtains water-coal-slurry.
The concentration of the water-coal-slurry obtained after process stabilizing is 63.7wt%, and average grain diameter is 75 μm, and 30~80 μm of materials are accounted for
More than the 70% of total material, viscosity is 1028mPas, and stability is general, and syneresis rate is more than 3% after standing 48 hours.
Comparative example 4
With differing only in for embodiment 3：Second slurry all carries out high shear and roughly ground without shaping.Specially：
1) shenfu coal is crushed, obtains the coal dust that particle diameter is less than 5mm, be according to mass ratio with water and lignosulfonates
75:25:0.5 mixing, obtains the first slurry；
2) by 40wt% the first slurry shaping fine grinding, the second slurry is obtained, particle diameter is 10~15 μm, by remaining first
Slurry mixing carries out shaping corase grind and obtains the 3rd slurry, and particle diameter is 50~60 μm；
3) the 3rd slurry is mixed with the second slurry, high shear is carried out with 100r/min speed, the 4th slurry is obtained；
40wt% the 4th slurry return to step 2) carry out shaping fine grinding；
4) remaining 4th slurry output obtains water-coal-slurry.
The concentration of the water-coal-slurry obtained after process stabilizing is 64.1wt%, and average grain diameter is 76 μm, and 30~80 μm of materials are accounted for
More than the 74% of total material, viscosity is 1089mPas, and syneresis rate is more than 5% after standing 48 hours.
Comparative example 5
Embodiment 5 in CN106147897A.
The concentration of the water-coal-slurry obtained after process stabilizing is 70wt%, and viscosity is 1158mPas, is had good stability, and is stood
Syneresis rate is 8.6% after 48 hours.
The result of comparative examples 3 and comparative example 1~4 understands that raw coal of the present invention crushes shaping corase grind, shaping fine grinding respectively
There is the effect that cooperates with mutually between the step of high shear three, work in coordination by slurry obtain grain size distribution rationally, can be effectively
Fill space, improve deposition efficiency while the water-coal-slurry of high concentration, deposition efficiency and water coal can all be significantly reduced by omitting any step
Starch concentration.
Compared to the technique of comparative example 5, embodiment 5 is added：The not clipped raw coal powder in part has been subjected to fine grinding, adopted
Roughly ground respectively and fine grinding with bidirectional feed, feed time and inlet amount, comparative examples 5 and comparative example 5 can be controlled
As a result understand, this technologic improvement achieves unexpected technique effect, obtains stability and the higher water-coal-slurry of concentration,
Illustrate that the technique of the present invention is greatly improved compared with the deposition efficiency of prior art.
Applicant states that the present invention illustrates the detailed construction feature of the present invention by above-described embodiment, but the present invention is simultaneously
Above-mentioned detailed construction feature is not limited to, that is, does not mean that the present invention has to rely on above-mentioned detailed construction feature and could implemented.Institute
Belong to those skilled in the art it will be clearly understood that any improvement in the present invention, to the equivalence replacement of part selected by the present invention
And increase, the selection of concrete mode of accessory etc., within the scope of all falling within protection scope of the present invention and being open.
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment
Detail, in the range of the technology design of the present invention, a variety of simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (10)
1. a kind of preparation method of water-coal-slurry, it is characterised in that comprise the following steps：
(1) feed coal is crushed, obtains coal dust；Part coal dust is mixed with additive and water, the first slurry is obtained, will be remaining
Coal dust is mixed with additive and water, obtains the second slurry；
(2) by the second slurry shaping fine grinding, the 3rd slurry is obtained, it is thick that the first slurry is mixed into progress shaping with the slurry of part the 3rd
Mill obtains the 4th slurry；
(3) the 4th slurry is mixed into progress high shear with remaining 3rd slurry, obtains the 5th slurry；
The output of (4) the 5th slurries obtains water-coal-slurry.
2. preparation method as claimed in claim 1, it is characterised in that the particle diameter of step (1) described coal dust is less than 5mm, preferably 1
~4mm.
3. preparation method as claimed in claim 1 or 2, it is characterised in that part coal when step (1) prepares the first slurry
The mass ratio of powder, water and additive is (70~90):(10~30):(0.1~1), preferably (75~85):(15~25):(0.3
~0.8)；
Preferably, the mass ratio of the remaining coal dust, water and additive is (70~90) when step (1) prepares the second slurry:
(10~30):(0.1~0.5), preferably (75~85):(15~25):(0.1~0.3)；
Preferably, step (1) described additive appointing in lignosulfonates, humate and naphthalene sulfonic acid-formaldehyde condensation product
Meaning it is a kind of or at least two combinations.
4. the preparation method as described in any one of claims 1 to 3, it is characterised in that step (1) the part coal dust accounts for described
The 60~99% of coal dust gross mass, preferably 65~99%；
Preferably, step (2) slurry of part the 3rd accounts for the 5~40% of the 3rd slurry gross mass, preferably 5~30%.
5. the preparation method as described in any one of Claims 1 to 5, it is characterised in that the particle diameter of step (2) the 3rd slurry
For 5~20 μm, preferably 8~20 μm；
Preferably, the particle diameter of step (2) the 4th slurry is 35~90 μm, preferably 40~85 μm.
6. the preparation method as described in any one of Claims 1 to 5, it is characterised in that the speed of step (3) described high shear is
80~150r/min, preferably 80~130r/min.
7. the preparation method as described in any one of claim 1~6, it is characterised in that the 5 of step (3) the 5th slurry~
40wt% return to step (2) carries out shaping fine grinding.
8. the preparation method as described in any one of claim 1~7, it is characterised in that comprise the following steps：
(1) feed coal is crushed, obtains the coal dust that particle diameter is less than 5mm, by 60~99wt% coal dust and water and additive according to
Mass ratio is (70~90):(10~30):(0.1~1) mix, obtain the first slurry；By remaining coal dust and additive and water
It is (70~90) according to mass ratio:(10~30):(0.1~0.5) mix, obtain the second slurry；The additive is selected from wooden
In plain sulfonate, humate and naphthalene sulfonic acid-formaldehyde condensation product any one or at least two combination；
(2) by the second slurry shaping fine grinding, the 3rd slurry is obtained, particle diameter is 5~20 μm, by the first slurry and 5~40wt%
The mixing of 3rd slurry carries out shaping corase grind and obtains the 4th slurry, and particle diameter is 35~90 μm；
(3) the 4th slurry is mixed with remaining 3rd slurry, high shear is carried out with 80~150r/min speed, the 5th is obtained
Slurry；5~40wt% the 5th slurry return to step (2) carries out shaping fine grinding；
(4) remaining 5th slurry output obtains water-coal-slurry.
9. the preparation method as described in any one of claim 1~8, it is characterised in that the concentration of step (4) described water-coal-slurry is big
In 62.2wt%；
Preferably, the average grain diameter of step (4) described water-coal-slurry is 30~80 μm, preferably 30~70 μm.
10. water-coal-slurry prepared by the preparation method as described in any one of claim 1~9.
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| US11591534B2 (en) * | 2018-12-05 | 2023-02-28 | Controlamatics Corporation | Process for producing clean coal using chemical pre-treatment and high shear reactor |
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| US11591534B2 (en) * | 2018-12-05 | 2023-02-28 | Controlamatics Corporation | Process for producing clean coal using chemical pre-treatment and high shear reactor |
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