CN106147897A - A kind of low-order coal water-coal-slurry and preparation method thereof - Google Patents
A kind of low-order coal water-coal-slurry and preparation method thereof Download PDFInfo
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- CN106147897A CN106147897A CN201610482834.XA CN201610482834A CN106147897A CN 106147897 A CN106147897 A CN 106147897A CN 201610482834 A CN201610482834 A CN 201610482834A CN 106147897 A CN106147897 A CN 106147897A
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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
- C10L2290/24—Mixing, stirring of fuel components
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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
Abstract
The invention provides a kind of low-order coal water-coal-slurry and preparation method thereof, the preparation method of described water-coal-slurry, including: coal raw material is crushed, roughly grinds slurrying, screening, shears, shaping, fine grinding and Ultrafine Grinding, and the material after fine grinding and Ultrafine Grinding is re-started corase grind, sieve and shear.The concentration of the water-coal-slurry that described method obtains is 58 70wt%, the particle diameter≤0.3mm of coal dust, accounts for more than the 37% of total coal dust less than 75 μ m coal powder, and has good stability, and after standing 48 hours, syneresis rate is less than 10%.The preparation method of described water-coal-slurry can improve low-order coal and be converted into the performance of gasified coal water slurry, and described method is applicable to coal raw material of different nature, energy consumption is low, the water-coal-slurry deposition efficiency obtained is high, can produce continuously, meet continuous, stable, the production requirement of low consumption preparing gasified coal water slurry.
Description
Technical field
The invention belongs to the clean utilization technical field of coal resources, relate to a kind of water-coal-slurry and preparation method thereof, especially
Relate to a kind of low-order coal water-coal-slurry and preparation method thereof.
Background technology
Coal is the main energy sources of China, will not change within following considerable time.Country implements Filter Tuber For Clean Coal plan,
Using clean coal technology as improving coal utilization efficiency, reduce the important means of environmental pollution, more come by various circles of society
The most concerns, development clean coal technology including COAL-WATER SLURRY TECHNOLOGY is pendulum urgent task in face of compatriots.The kind of coal
Class is a lot, has the features such as different surface oxygen functional group, porosity, surface hydrophobic and grindabilitys.
Water-coal-slurry is coal based fluid fuel and the gasified raw material of a kind of environmental protection and energy saving.The kind of the coal of China is mainly low order
Coal, the interior water of low-order coal is high, grindability is poor, paste-forming properties is bad, can optimize and improve grain size distribution by using coal blending, improve
With the slurry concentration improving low-order coal.Therefore, this area needs to develop a kind of high concentration, low interior water, the gasified water of high stability
Coal slurry product.
CN 105038878A discloses a kind of method preparing water-coal-slurry, and described method passes through substep by difficulty pulping dry coal
Pulverize, afterwards branch divide carry out roughly grinding, be dehydrated, fine grinding, the step such as Ultrafine Grinding, after using the mixing of specific ratio, be filled with coal
Space during particle packing, improves deposition efficiency, thus improves the concentration of water-coal-slurry, and the water-coal-slurry prepared can meet
Gasification and burn application demand.
CN105154154A discloses the preparation method of a kind of ultra-thin slurries, and described method comprises the steps: that (1) will
Coal raw material is crushed to below 13mm, obtains the first slurry；(2) the first slurry is mixed with water 5-85:15-95 in mass ratio,
To the second slurry；(3) the second slurry wet method shaping fine grinding being obtained the 3rd slurry, described 3rd slurry particle diameter is less than 1mm, is less than
45 μm materials account for more than the 80% of total material；(4) by the 3rd slurry screen cloth remove impurity, after removing foreign material, it is ultra-thin slurries.
But, the water coal slurry concentration that both the above method obtains need to promote further.
Summary of the invention
The deficiency existed for prior art, it is an object of the invention to provide a kind of low-order coal water-coal-slurry and preparation side thereof
Method, the preparation method of described water-coal-slurry is applicable to coal raw material of different nature, is particularly suited for low-order coal raw material, and energy consumption is low,
The water-coal-slurry deposition efficiency arrived is high, and the concentration of water-coal-slurry can reach 58-70wt%, it is possible to produces continuously, meets and prepares gasified water
Continuous, stable, the production requirement of low consumption of coal slurry.
In the present invention, " wt% " refers to weight/mass percentage composition if no special instructions.
For reaching this purpose, the present invention by the following technical solutions:
An object of the present invention is to provide the preparation method of a kind of water-coal-slurry, described method to comprise the steps:
(1) obtain coal dust by broken for coal raw material, coal dust, additive and water are mixed, obtains the first slurry；
(2) carry out the first slurry roughly grinding slurrying, obtain the second slurry；
(3) being sieved by the second slurry, shear, obtain the 3rd slurry, part the 3rd slurry exports, and obtains described water coal
Slurry product；
Remaining 3rd slurry and water mixing, shaping, obtaining coal particle size size is 25-50 μm, and concentration is 15-35wt%
The 4th slurry；4th slurry carries out fine grinding and Ultrafine Grinding respectively, and it is 15-25 μm the 5th slurry that fine grinding obtains coal particle size, super
Fine grinding obtains the 6th slurry that coal particle size is 3-8 μm；The mixture of the 5th slurry and the 6th slurry return step (2) and/or
Step (3).
The mixture of the 5th slurry and the 6th slurry return step (2) and/or step (3) particularly as follows: by the 5th slurry and
6th slurry all returns step (2) and mixes with the first slurry, roughly grinds, then sieves, and shears, part output；Or,
5th slurry and the 6th slurry are all returned step (3) mix with the second slurry, sieve, shear, part
Output；Or,
5th slurry of a part and the mixture of the 6th slurry are returned step (2) mix with the first slurry, carry out thick
Mill, then sieve, shear, part output；Remaining 5th slurry and the 6th slurry are returned step (3) mix with the second slurry
Close, sieve, shear, part output.
The preparation method of the water-coal-slurry that the present invention provides will be roughly ground, and screening is sheared and shaping, and fine grinding is tied mutually with Ultrafine Grinding
Close, significantly improve the stability of water-coal-slurry product, and the hole that perfection is filled with between coal dust so that the concentration of water-coal-slurry up to
To 70wt%, having good stability, after standing 48 hours, syneresis rate is less than 10%.
The preparation method of the water-coal-slurry that the present invention provides is applicable to coal raw material of different nature, it is possible to increase low-order coal converts
For the performance of water-coal-slurry, energy consumption is low, it is possible to produce continuously, meets continuous, stable, the production requirement of low consumption of preparation water-coal-slurry.
Utilize the method for the invention to prepare water-coal-slurry, due to the 3rd slurry that exports first does not comprise the 5th slurry and
The material of the 6th size circulations, therefore, the 3rd slurry exported first can not collected, and can collect, obtain after circulation primary
The water-coal-slurry product needed.
The mass ratio of step (1) described coal dust, water and additive is (70-80): (20-30): (0.1-0.5), such as 72:
22:0.2,73:23:0.3,75:25:0.4,77:28:0.2 or 79:29:0.3 etc..
Preferably, step (1) described coal raw material is low-order coal.The preparation method of the water-coal-slurry that the present invention provides is especially suitable
In preparation low-order coal water-coal-slurry.
Preferably, the described low-order coal any one or at least two in brown coal, jet coal, dross coal or weakly caking coal
Combination.Typical but non-limiting combination such as, brown coal and jet coal, dross coal and weakly caking coal, brown coal and dross coal, brown coal with
Weakly caking coal, brown coal, jet coal and dross coal, jet coal, dross coal and weakly caking coal.
Preferably, the particle diameter of step (1) described coal dust be less than 13mm, as 12mm, 11mm, 10mm, 8mm, 6mm, 7mm,
5mm, 4mm, 3mm, 2mm, 0.5mm or 0.1mm etc..
Preferably, step (1) described additive is in lignosulfonates, humate or naphthalene sulfonic acid-formaldehyde condensation product
Any one or the combination of at least two.Typical but non-limiting combination such as lignosulfonates and humate, wooden
Element sulfonate and naphthalene sulfonic acid-formaldehyde condensation product, lignosulfonates, humate and naphthalene sulfonic acid-formaldehyde condensation product.
The device of step (2) described corase grind is horizontal rod mill, horizontal ball mill, vertical ball mill or vertical stirring mill
In any one or the combination of at least two.The most horizontal rod mill of typical but non-limiting combination and horizontal ball mill, sleeping
Formula ball mill and vertical ball mill.
Preferably, the time of step (2) described corase grind is 10-30min, as 12min, 15min, 18min, 20min,
22min, 25min or 28min etc., the time of described corase grind can be according to the coal characteristic adjustment ore grinding time.
Preferably, step (2) described slurrying main purpose is to prepare coarse granule in water-coal-slurry granularity, in described second slurry
Coal slurry granularity mean diameter is 80-150 μm, as 85 μm, 90 μm, 95 μm, 100 μm, 102 μm, 105 μm, 110 μm, 115 μm, 120
μm, 130 μm or 140 μm etc..
Preferably, the concentration of described second slurry of step (2) is 55-80wt%, as 58wt%, 60wt%, 62wt%,
65wt%, 68wt%, 70wt%, 75wt% or 78wt% etc..
Step (3) described screening was 8-15 mesh sieve, as crossed 9 mesh, 10 mesh, 11 mesh, 12 mesh, 13 mesh or 14 sieves etc..
Preferably, the speed of step (3) described shearing is 80-100r/s, as 82r/s, 85r/s, 88r/s, 92r/s,
95r/s, 98r/s or 99r/s etc..
Preferably, step (3) described screening, shear and shear integrated device or respectively on screening machine and boxshear apparatus in screening
Carry out.
Preferably, described remaining 3rd slurry of step (3) is (70-80) with the amount ratio of water: (20-30), such as 72:
28,7:27,7:25 or 78:22.
Preferably, step (3) described shaping uses trimmer.
In described 4th slurry of step (3), coal particle size size is 25-50 μm, such as 26 μm, 28 μm, 30 μm, 35 μm, 38 μ
M, 40 μm, 42 μm or 48 μm etc..The concentration of the 4th slurry is 15-35wt%, as 18wt%, 20wt%, 22wt%, 23wt%,
25wt%, 28wt%, 30wt% or 32wt% etc..
In step (3), in the 5th slurry, the particle diameter of coal dust is 15-25 μm, such as 18 μm, 20 μm, 22 μm, 23 μm or 24 μm etc.,
In 6th slurry, the particle diameter of coal dust is 3-8 μm, such as 3.5 μm, 4 μm, 4.5 μm, 5 μm, 5.5 μm, 6 μm, 6.5 μm, 7 μm or 7.5 μm
Deng.
The mass ratio of the 4th slurry carrying out fine grinding and Ultrafine Grinding in step (3) is (1-5): 1, as 1.5:1,2:1,2.5:
1,3:1,3.5:1,4:1 or 4.5:1 etc..
Preferably, step (3) described fine grinding uses vertical mixing mill and/or Horizontal stirring mill.
Preferably, step (3) described Ultrafine Grinding uses vertical mixing mill and/or Horizontal stirring mill.
Preferably, described in step (3), the mixture of the 5th slurry and the 6th slurry is (0-4) according to mass ratio: (6-
10) step (2) and step (3) are returned respectively, such as 1:7,2:7,3:8,3:9 or 2:8 etc..
The water used in described method is the waste water produced in production clear water and/or Chemical Manufacture.
As preferred technical scheme, the preparation method of described water-coal-slurry comprises the steps:
(1) coal raw material is crushed to particle diameter and is less than 13mm, obtain coal dust, by coal dust, additive and water according to mass ratio be
(70-80): (20-30): (0.1-0.5) mixes, and obtains the first slurry；
(2) carrying out the first slurry roughly grinding slurrying, obtaining coal dust mean diameter is 80-150 μm, and concentration is 55-80wt%
The second slurry；
(3) the second slurry is crossed 8-15 mesh sieve, at the speed down cut of 80-100r/s, obtain the 3rd slurry, by part
Three slurry outputs, obtain described water-coal-slurry product；
It is (70-80) by remaining 3rd slurry and water according to mass ratio: (20-30) mixes, and shaping obtains coal particle size
Size is 25-50 μm, and concentration is the 4th slurry of 15-35wt%；It is (1-5) by the 4th slurry according to mass ratio: 1 is carried out respectively
Fine grinding and Ultrafine Grinding, it is 15-25 μm the 5th slurry that fine grinding obtains coal particle size, and Ultrafine Grinding obtains that coal particle size is 3-8 μm
Six slurries；The mixture of the 5th slurry and the 6th slurry is returned step (2) and/or step (3).
An object of the present invention also resides in a kind of water-coal-slurry of offer, and the concentration of described water-coal-slurry is 58-70wt%, coal dust
Particle diameter≤0.3mm, account for more than the 37% of total coal dust less than 75 μ m coal powder, such as 38%, 39%, 40%, 42%, 45%,
50%, 60%, 70% or 80% etc., different according to ature of coal, coal particle size is different.The deposition efficiency of described water-coal-slurry is than tradition system
Sizing process improves 6-12%.
The water-coal-slurry deposition efficiency that the present invention provides is high, and its concentration can reach 70wt%, and the particle diameter distribution of coal dust is than tradition
Pulping process improves deposition efficiency 6-12%, is perfectly filled with the hole between pulverized coal particle.
Compared with prior art, the invention have the benefit that
1, the preparation method of the water-coal-slurry that the present invention provides with low-order coal for raw material use crushing technology and screening, shearing,
The method that shaping, fine grinding and Ultrafine Grinding technology combine effectively fills accumulation space, improves than traditional pulping process and piles up effect
Rate 6-12%, improves gasified coal water slurry concentration 5-8%, and the water coal prepared has good stability, syneresis rate after standing 48 hours
Less than 10%.
2, the preparation method of the water-coal-slurry that the present invention provides by the crushing of original and existing pulping process, grind, sieve and
Shearing is merged, and i.e. fine grinding, Ultrafine Grinding after low-order coal screened shearing shaping, effectively reduce slurrying energy expenditure.
3, the preparation method of the water-coal-slurry that the present invention provides is in corase grind, fine grinding and Ultrafine Grinding link, can be actual according to ature of coal
Situation selects high efficiency grinder, to improve slurrying concentration, reduces energy consumption.
4, the preparation method of the water-coal-slurry that the present invention provides is continuous way production technology, meets the company preparing gasified coal water slurry
Continue, stablize and the production requirement of low consumption.
Accompanying drawing explanation
The preparation technology flow chart of the water-coal-slurry that Fig. 1 provides for one embodiment of the present invention.
Detailed description of the invention
Further illustrate technical scheme below in conjunction with the accompanying drawings and by detailed description of the invention.
As it is shown in figure 1, the preparation method of the water-coal-slurry provided for one embodiment of the present invention, described method includes as follows
Step:
(1) obtain coal dust by broken for coal raw material, coal dust, additive and water are mixed, obtains the first slurry；
(2) carry out the first slurry roughly grinding slurrying, obtain the second slurry；
(3) being sieved by the second slurry, shear, obtain the 3rd slurry, part the 3rd slurry exports, and obtains described water coal
Slurry；
Remaining 3rd slurry and water mixing, shaping, obtaining coal particle size size is 25-50 μm, and concentration is 15-35wt%
The 4th slurry；4th slurry is carried out fine grinding and Ultrafine Grinding respectively, and it is 15-25 μm the 5th slurry that fine grinding obtains coal particle size,
Ultrafine Grinding obtains the 6th slurry that coal particle size is 3-8 μm；The mixture of the 5th slurry and the 6th slurry is returned step (2)
And/or step (3).
Embodiment 1
A kind of method being prepared water-coal-slurry by jet coal, jet coal is a kind of common low-order coal in area, Yulin, analyzes
Water is 4.9%, and full water is 13%, and ash is 13.9%.
Described method comprises the steps:
(1) coal raw material is crushed to the particle diameter coal dust less than 13mm, by coal dust, industrial water and additive according to 75:25:
The first slurry is obtained after 0.3 mass ratio mixing；
(2) the first slurry input is carried out pulping process to kibbling mill, obtain second slurry of 68.6wt%；
(3) by the second slurry in step (2) through 8 eye mesh screen remove impurity, afterwards at 100r/s shearing force down cut, the 3rd is obtained
Slurry, by the 3rd slurry output of 61.1wt%, obtains described water-coal-slurry；
3rd slurry of remaining 38.9wt% is added water and carries out shaping and obtain the 4th slurry, wherein, the 4th slurry dense
Degree is 27wt%, and after shaping, the 4th slurry particle diameter is 35 μm；By the 4th slurry according to mass ratio be 1.7:1 carry out respectively fine grinding and
Ultrafine Grinding, the 4th slurry fine grinding obtains the 5th slurry, and the 4th slurry Ultrafine Grinding obtains the 6th slurry, wherein, the 5th slurry particle diameter
It it is the material of 19.3 μm；6th slurry particle diameter is the material of 5.6 μm；Below the mixture of the 5th slurry and the 6th slurry is used
Mode processes:
It is that 4:6 returns step (2) and step (3) respectively by the mixture of the 5th slurry and the 6th slurry according to mass ratio.
After circulation primary, the concentration of the water-coal-slurry obtained is 68.6wt%, and mean diameter is 100 μm, less than 75 μm materials
Accounting for more than the 43% of total material, viscosity is 1060mPa S, has good stability, and after static 48 hours, syneresis rate is less than 10%.
Embodiment 2
A kind of method being prepared water-coal-slurry by brown coal, brown coal are a kind of common low-order coal in Hailar Area, the Inner Mongol, analyze
Water is 14.9%, and full water is 31%, and ash is 12.9%, and particle diameter is less than 50mm.
Said method comprising the steps of:
(1) brown coal crushing to particle diameter is less than the coal dust of 13mm, by coal dust, industrial water and additive according to 85:15:
The first slurry is obtained after 0.3 mass ratio mixing；
(2) the first slurry input is carried out pulping process to kibbling mill, obtain second slurry of 58wt%；
(3) by the second slurry in step (2) through 15 eye mesh screen remove impurity, afterwards at 80r/s shearing force down cut, the 3rd is obtained
Slurry, by the 3rd slurry output of 61.3wt%, obtains described water-coal-slurry；
Being added water by remaining 3rd slurry and carry out shaping and obtain the 4th slurry of 31wt%, after shaping, the 4th slurry particle diameter is
42μm；Being that 2.5:1 carries out fine grinding and Ultrafine Grinding respectively by the 4th slurry according to mass ratio, the 4th slurry fine grinding obtains the 5th slurry
Material, the 4th slurry Ultrafine Grinding obtains the 6th slurry, and wherein, the 5th slurry particle diameter is the material of 16.8 μm；6th slurry particle diameter is
The material of 7.5 μm；
The mixture of the 5th slurry and the 6th slurry is the most directly returned step (3).
After circulation primary, the concentration of the described water-coal-slurry obtained is 58wt%, and viscosity is 1158mPa S, particle diameter≤
0.3mm, accounts for more than the 40% of total material less than 75 μm materials, has good stability, and after static 48 hours, syneresis rate is less than 10%.
Embodiment 3
A kind of method being prepared water-coal-slurry by Xinjiang Red Hill coal, Xinjiang Red Hill coal is that quasi-Ge Er area, Xinjiang is a kind of common low
Rank coal, analyzing water is 11.2%, and full water is 24%, and ash is 12.9%, and particle diameter is less than 50mm.
Said method comprising the steps of:
(1) Xinjiang Zhungeer coal is crushed to particle diameter less than the coal dust of 13mm, by coal dust, industrial water and additive according to
The first slurry is obtained after the mixing of 80:20:0.3 mass ratio；
(2) the first slurry input is carried out pulping process to kibbling mill, obtain second slurry of 60wt%；
(3) by the second slurry through 9 eye mesh screen remove impurity, afterwards at 90r/s shearing force down cut, the 3rd slurry is obtained, will
The 3rd slurry output of 62wt%, obtains described water-coal-slurry；
Being added water by remaining 3rd slurry and carry out shaping and obtain the 4th slurry of 25wt%, after shaping, the 4th slurry particle diameter is
39.1μm；Being that 2:1 carries out fine grinding and Ultrafine Grinding respectively by the 4th slurry according to mass ratio, the 4th slurry fine grinding obtains the 5th slurry
Material, the 4th slurry Ultrafine Grinding obtains the 6th slurry, and wherein, the 5th slurry particle diameter is the material of 16.9 μm；6th slurry particle diameter is
The material of 7.5 μm；It is that 2:8 returns step (2) and step respectively by the mixture of the 5th slurry and the 6th slurry according to mass ratio
(3)。
After circulation primary, the concentration of the water-coal-slurry obtained is 60.8wt%, and viscosity is 1200mPa S, particle diameter≤0.3mm,
Accounting for more than the 37% of total material less than 75 μm materials, have good stability, after static 48 hours, syneresis rate is less than 10%.
Embodiment 4
A kind of method being prepared water-coal-slurry by brown coal, brown coal are a kind of common low-order coal in area, Hulun Buir Sandy Land, point
Bleed is 14.9%, and full water is 31%, and ash is 12.9%, and particle diameter is less than 50mm.
Said method comprising the steps of:
(1) brown coal crushing to particle diameter is less than the coal dust of 13mm, by coal dust, industrial water and additive according to 70:30:
The first slurry is obtained after 0.1 mass ratio mixing；
(2) the first slurry input is carried out pulping process to kibbling mill, obtain second slurry of 80wt%；
(3) by the second slurry in step (2) through 15 eye mesh screen remove impurity, afterwards at 80r/s shearing force down cut, the 3rd is obtained
Slurry, 58wt% the 3rd slurry exports, obtains described water-coal-slurry；
Being added water by remaining 3rd slurry and carry out shaping and obtain the 4th slurry of 35wt%, after shaping, the 4th slurry particle diameter is
25μm；Being that 5:1 carries out fine grinding and Ultrafine Grinding respectively by the 4th slurry according to mass ratio, the 4th slurry fine grinding obtains the 5th slurry,
4th slurry Ultrafine Grinding obtains the 6th slurry, and wherein, the 5th slurry particle diameter is the material of 15 μm；6th slurry particle diameter is 3 μm
Material；
5th slurry and the 6th slurry are the most directly returned step (2).
After circulation primary, the concentration of the described water-coal-slurry obtained is 62wt%, and viscosity is 1158mPa S, particle diameter≤
0.3mm, accounts for more than the 40% of total material less than 75 μm materials, has good stability, and after static 48 hours, syneresis rate is less than 10%.
Embodiment 5
A kind of by prepared with Shenfu coal for the method for water-coal-slurry, shenfu coal is a kind of common low-order coal in god's mansion district, Shaanxi, analyzes
Water is 4.8%, and full water is 12%, and ash is 12.9%, and particle diameter is less than 50mm.
Said method comprising the steps of:
(1) shenfu coal is crushed to the particle diameter coal dust less than 13mm, by coal dust, industrial water and additive according to 80:20:
The first slurry is obtained after 0.5 mass ratio mixing；
(2) the first slurry input is carried out pulping process to kibbling mill, obtain second slurry of 55wt%；
(3) by the second slurry in step (2) through 8 eye mesh screen remove impurity, afterwards at 100r/s shearing force down cut, the 3rd is obtained
Slurry, by the 3rd slurry output of 78wt%, obtains described water-coal-slurry；
Being added water by remaining 3rd slurry and carry out shaping and obtain the 4th slurry of 15wt%, after shaping, the 4th slurry particle diameter is
50μm；Being that 1:1 carries out fine grinding and Ultrafine Grinding respectively by the 4th slurry according to mass ratio, the 4th slurry fine grinding obtains the 5th slurry,
4th slurry Ultrafine Grinding obtains the 6th slurry, and wherein, the 5th slurry particle diameter is the material of 25 μm；6th slurry particle diameter is 8 μm
Material；5th slurry and the 6th slurry are the most directly returned step (2).
After circulation primary, the concentration of the described water-coal-slurry obtained is 70wt%, and viscosity is 1158mPa S, particle diameter≤
0.3mm, accounts for more than the 40% of total material less than 75 μm materials, has good stability, and after static 48 hours, syneresis rate is less than 10%.
Comparative example 1
A kind of method being prepared water-coal-slurry by jet coal, jet coal is a kind of common low-order coal in area, Yulin, analyzes
Water is 4.9%, and full water is 13%, and ash is 12.9%, and particle diameter is less than 50mm.
Said method comprising the steps of:
(1) brown coal crushing to particle diameter is less than the coal dust of 13mm, by coal dust, industrial water and additive according to 75:25:
The first slurry is obtained after 0.3 mass ratio mixing；
(2) the first slurry input is carried out pulping process to kibbling mill, obtain second slurry of 68.6wt%；
(3) by the second slurry in step (2) through 8 eye mesh screen remove impurity, afterwards at 100r/s shearing force down cut, the 3rd is obtained
Slurry, by the 3rd slurry output of 61.7wt%, obtains described water-coal-slurry；
3rd slurry of remaining 38.9wt% is added water and is mixed to get the 4th slurry of 27wt%；By the 4th slurry according to
Mass ratio is that 1.7:1 carries out fine grinding and Ultrafine Grinding respectively, and the 4th slurry fine grinding obtains the 5th slurry, and the 4th slurry Ultrafine Grinding obtains
6th slurry, wherein, the 5th slurry particle diameter is the material of 25 μm；6th slurry particle diameter is the material of 8 μm；By the 5th slurry and
The mixture of six slurries the most directly returns step (2).
Once after circulation, the concentration of the described water-coal-slurry obtained is 55wt%, and viscosity is 1000mPa S, particle diameter≤
0.3mm, accounts for more than the 35% of total material less than 75 μm materials, but after static 24 hours, syneresis rate is more than 10%, and fine grinding
Increase with Ultrafine Grinding link energy consumption.
Comparative example 2
A kind of method being prepared water-coal-slurry by brown coal, brown coal are a kind of common low-order coal in Hailar Area, the Inner Mongol, analyze
Water is 14.9%, and full water is 31%, and ash is 12.9%, and particle diameter is less than 50mm.
Said method comprising the steps of:
(1) brown coal crushing to particle diameter is less than the coal dust of 13mm, by coal dust, industrial water and additive according to 85:15:
The first slurry is obtained after 0.3 mass ratio mixing；
(2) the first slurry input is carried out pulping process to kibbling mill, obtain second slurry of 58wt%；
(3) by the second slurry in step (2) through 8 eye mesh screen remove impurity, afterwards at 100r/s shearing force down cut, the 3rd is obtained
Slurry, by the 3rd slurry output of 61.3wt%, obtains described water-coal-slurry；
3rd slurry of remaining 38.7wt% is added water and carries out shaping and obtain the 4th slurry of 31wt%, after shaping the 4th
Slurry particle diameter is 50 μm；4th slurry being carried out fine grinding, obtains the 5th slurry, the 5th slurry particle diameter is the material of 25 μm；Will be thin
The 5th slurry after mill directly returns step (2).
Once after circulation, the concentration of described water-coal-slurry is 53wt%, and viscosity is 1010mPa S, and particle diameter≤0.3mm is less than
75 μm materials account for more than the 28% of total material, and after static 24 hours, syneresis rate is more than 10%, and fine grinding link energy consumption increases.
Comparative example 3
A kind of method being prepared water-coal-slurry by brown coal, brown coal are a kind of common low-order coal in Hailar Area, the Inner Mongol, analyze
Water is 14.9%, and full water is 31%, and ash is 12.9%, and particle diameter is less than 50mm.
Said method comprising the steps of:
(1) brown coal crushing to particle diameter is less than the coal dust of 13mm, by coal dust, industrial water and additive according to 85:15:
The first slurry is obtained after 0.3 mass ratio mixing；
(2) the first slurry input is carried out pulping process to kibbling mill, obtain second slurry of 58wt%；
(3) by the second slurry in step (2) through 8 eye mesh screen remove impurity, afterwards at 100r/s shearing force down cut, the 3rd is obtained
Slurry, by the 3rd slurry output of 61.3wt%, obtains described water-coal-slurry；
3rd slurry of remaining 38.7wt% is added water and carries out shaping and obtain the 4th slurry of 31wt%, after shaping the 4th
Slurry particle diameter is 50 μm；4th slurry being carried out Ultrafine Grinding, obtains the 6th slurry, the 6th slurry particle diameter is the material of 8 μm；Will be super
The 6th slurry after fine grinding the most directly returns step (2).
Once after circulation, the concentration of the described water-coal-slurry obtained is 50wt%, and viscosity is 1100mPa S, particle diameter≤
0.3mm, accounts for more than the 45% of total material less than 75 μm materials, and after static 24 hours, syneresis rate is more than 10%, and at Ultrafine Grinding
Link energy consumption increases.
Applicant states, the foregoing is only the detailed description of the invention of the present invention, but protection scope of the present invention not office
Being limited to this, person of ordinary skill in the field is it will be clearly understood that any those skilled in the art of belonging to take off in the present invention
In the technical scope of dew, the change that can readily occur in or replacement, within the scope of all falling within protection scope of the present invention and disclosure.
Claims (10)
1. the preparation method of a water-coal-slurry, it is characterised in that described method comprises the steps:
(1) obtain coal dust by broken for coal raw material, coal dust, additive and water are mixed, obtains the first slurry；
(2) carry out the first slurry roughly grinding slurrying, obtain the second slurry；
(3) being sieved by the second slurry, shear, obtain the 3rd slurry, part the 3rd slurry exports, and obtains described water-coal-slurry and produces
Product；
Remaining 3rd slurry and water mixing, shaping, obtaining coal particle size size is 25-50 μm, and concentration is the of 15-35wt%
Four slurries；4th slurry carries out fine grinding and Ultrafine Grinding respectively, and fine grinding obtains the 5th slurry that coal particle size is 15-25 μm, ultra-fine
Mill obtains the 6th slurry that coal particle size is 3-8 μm；The mixture of the 5th slurry and the 6th slurry returns step (2) and/or step
Suddenly (3).
Method the most according to claim 1, it is characterised in that the mass ratio of step (1) described coal dust, water and additive is
(70-80):(20-30):(0.1-0.5)；
Preferably, step (1) described coal raw material is low-order coal；
Preferably, the described low-order coal any one or the group of at least two in brown coal, jet coal, dross coal or weakly caking coal
Close；
Preferably, the particle diameter of step (1) described coal dust is less than 13mm；
Preferably, step (1) described additive appointing in lignosulfonates, humate or naphthalene sulfonic acid-formaldehyde condensation product
Anticipate a kind of or combination of at least two.
Method the most according to claim 1 and 2, it is characterised in that the device of step (2) described corase grind is horizontal rod milling
Any one or the combination of at least two in machine, horizontal ball mill, vertical ball mill or vertical stirring mill；
Preferably, the time of step (2) described corase grind is 10-30min；
Preferably, in described second slurry of step (2), the mean diameter of coal dust is 80-150 μm；
Preferably, the concentration of described second slurry of step (2) is 55-80wt%.
4. according to the method one of claim 1-3 Suo Shu, it is characterised in that step (3) described screening was 8-15 mesh sieve；
Preferably, the speed of step (3) described shearing is 80-100r/s；
Preferably, step (3) described screening, shear and shear integrated device or enterprising at screening machine and boxshear apparatus respectively in screening
OK.
5. utilize the method that one of claim 1-4 is described, it is characterised in that described remaining 3rd slurry and the water of step (3)
Mass ratio be (70-80): (20-30)；
Preferably, step (4) described shaping uses trimmer.
6. according to the method one of claim 1-5 Suo Shu, it is characterised in that step (3) carries out the of fine grinding and Ultrafine Grinding
The mass ratio of four slurries is (1-5): 1；
Preferably, step (3) described fine grinding uses vertical mixing mill and/or Horizontal stirring mill；
Preferably, step (3) described Ultrafine Grinding uses vertical mixing mill and/or Horizontal stirring mill.
7. according to the method one of claim 1-6 Suo Shu, it is characterised in that the 5th slurry described in step (3) and the 6th slurry
The mixture of material is (0-4) according to mass ratio: (6-10) returns step (2) and step (3) respectively.
8. according to the method one of claim 1-7 Suo Shu, it is characterised in that the water used in described method is production clear water
And/or the waste water produced in Chemical Manufacture.
9. according to the method one of claim 1-8 Suo Shu, it is characterised in that described method comprises the steps:
(1) coal raw material is crushed to particle diameter less than 13mm, obtains coal dust, be (70-by coal dust, additive and water according to mass ratio
80): (20-30): (0.1-0.5) mixes, and obtains the first slurry；
(2) carrying out the first slurry roughly grinding slurrying, obtaining coal dust mean diameter is 80-150 μm, and concentration is the of 55-80wt%
Two slurries；
(3) the second slurry is crossed 8-15 mesh sieve, at the speed down cut of 80-100r/s, obtain the 3rd slurry, part the 3rd is starched
Material output, obtains described water-coal-slurry product；
It is (70-80) by remaining 3rd slurry and water according to mass ratio: (20-30) mixes, and shaping obtains coal particle size size
For 25-50 μm, concentration is the 4th slurry of 15-35wt%；It is (1-5) by the 4th slurry according to mass ratio: 1 carries out fine grinding respectively
And Ultrafine Grinding, it is 15-25 μm the 5th slurry that fine grinding obtains coal particle size, and Ultrafine Grinding obtains the 6th slurry that coal particle size is 3-8 μm
Material；The mixture of the 5th slurry and the 6th slurry is returned step (2) and/or step (3).
10. the water-coal-slurry obtained according to the preparation method one of claim 1-9 Suo Shu, it is characterised in that described water-coal-slurry
Concentration is 58-70wt%, the particle diameter≤0.3mm of coal dust, accounts for more than the 37% of total coal dust less than 75 μ m coal powder.
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| CN107129842A (en) * | 2017-06-23 | 2017-09-05 | 中国矿业大学 | A kind of preparation method of sulfur-fixing type water-coal-slurry |
| CN107164005A (en) * | 2017-06-22 | 2017-09-15 | 中煤科工清洁能源股份有限公司 | A kind of water-coal-slurry and preparation method thereof |
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| CN108219877A (en) * | 2016-12-15 | 2018-06-29 | 煤科院节能技术有限公司 | A kind of method for preparing high-concentration coal-water slurry |
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| CN109082313A (en) * | 2018-08-06 | 2018-12-25 | 国网辽宁省电力有限公司电力科学研究院 | It is a kind of improve low-order coal water-coal-slurry slurry concentration propose effect agent and its application method |
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| CN107129842A (en) * | 2017-06-23 | 2017-09-05 | 中国矿业大学 | A kind of preparation method of sulfur-fixing type water-coal-slurry |
| CN107267235A (en) * | 2017-06-27 | 2017-10-20 | 中煤科工清洁能源股份有限公司 | A kind of method that many raw materials prepare novel water-coal-slurry product |
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| CN108456573B (en) * | 2018-05-28 | 2021-02-26 | 西北化工研究院有限公司 | Production process for improving solid content of slurry |
| CN109082313A (en) * | 2018-08-06 | 2018-12-25 | 国网辽宁省电力有限公司电力科学研究院 | It is a kind of improve low-order coal water-coal-slurry slurry concentration propose effect agent and its application method |
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