CN106987290B - A method of improving pipeline transportation water-coal-slurry end product concentration - Google Patents
A method of improving pipeline transportation water-coal-slurry end product concentration Download PDFInfo
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- CN106987290B CN106987290B CN201710407184.7A CN201710407184A CN106987290B CN 106987290 B CN106987290 B CN 106987290B CN 201710407184 A CN201710407184 A CN 201710407184A CN 106987290 B CN106987290 B CN 106987290B
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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
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/146—Macromolecular compounds according to different macromolecular groups, mixtures thereof
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/24—Organic compounds containing sulfur, selenium and/or tellurium
- C10L1/2462—Organic compounds containing sulfur, selenium and/or tellurium macromolecular compounds
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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
- C10L2300/00—Mixture of two or more additives covered by the same group of C10L1/00 - C10L1/308
- C10L2300/30—Mixture of three 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
- C10L2300/00—Mixture of two or more additives covered by the same group of C10L1/00 - C10L1/308
- C10L2300/40—Mixture of four or more components
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Abstract
The present invention provides a kind of methods for improving pipeline transportation water-coal-slurry end product concentration, the described method comprises the following steps: (1) will partially manage defeated coal slurry and mix progress fine grinding with water and additive, obtain the first slurry；(2) Ultrafine Grinding is carried out after partially managing defeated coal slurry, the first slurry of part, water and additive mixing, obtains the second slurry；(3) remaining first slurry and the second slurry are mixed to get third slurry；(4) raw coal is managed defeated coal slurry, part third slurry, water and additive with residue to mix, obtains the 4th slurry after carrying out wet milling；(5) the 4th slurry is mixed with remaining third slurry, obtains finished product coal slurry after screening removal of impurities.The method of the invention can optimize coal slurry grain size distribution, so that concentration is at least promoted 8~20 percentage points compared with pipeline end product, and coal slurry mobility, stability and atomization greatly improve.
Description
Technical field
The invention belongs to water-coal-slurry preparation technical field, it is related to a kind of pipeline transportation water-coal-slurry end product concentration that improves
Method more particularly to a kind of method for improving long-distance pipe transport water-coal-slurry end product concentration.
Background technique
Coal slurry pipeline conveying can be used as the important coal resources conveying of the another kind in addition to the conveying of railway, highway and water route
Mode has many advantages, such as that investment is relatively low, effect on environment is small, climate influence is small and conveying is at low cost, is a kind of safety
Efficiently, technologically advanced, energy and land saving and environmental clean Ways of coal haulage.It is influenced by rheological characteristic and stability, conventional pipeline is defeated
The concentration of slurry of delivering coal is generally below 55%, and grain size distribution is unreasonable.During cool water mixture burning and gasification, water-coal-slurry is improved
Concentration will be such that the burning of coal slurry and gasification efficiency significantly improves, when coal-water fluid concentration is lower than 60%, be unfavorable for carrying out burning or
Gasification reaction；It is 60%~75% that cool water mixture burning and gasification, which require coal-water fluid concentration, so needing whole to the defeated coal slurry of low concentration pipe
End product quality is promoted.
CN 105194912A discloses a kind of long range coal chute road terminal coal slurry upgrading system device and method, described
Device includes pipeline heater, coal chute road, screen bowl centrifuge, slurry can, thickener and sewage treatment plant.Coal chute
Coal slurry in road is dehydrated after pipeline heater heats into screen bowl centrifuge, and product is transported to slurry can after dehydration,
The filtrate of screen bowl centrifuge enters sedimentation centrifugate bucket, is delivered to thickener concentration by pump, thickener underflow is defeated by pumping
Send to agitator, the coal slurry in agitator is delivered to slurry can by pump after stirring, thickener overflow by pipeline extremely
Sewage treatment plant.High concentration coal slurry in slurry can directly feed coal chemical industry user use.The method energy consumption is high, process phase
To complexity, and coal slurry grain size distribution optimization is unreasonable, causes product coal-water fluid concentration lower.
CN 105312003A discloses a kind of dehydration of long-distance pipe terminal coal slurry and combines pulping device with fine grinding, described
Device includes middle concentration coal slurry tank, Sedimentation centrifugel, drag conveyor, mixing and stirring tank, thickener, atomizer mill, sewage
Treatment plant, coal slurry diaphragm pump and high concentration coal slurry tank.Defeated coal slurry is managed in middle concentration coal slurry tank over long distances to be centrifuged by sedimentation filtration
After machine dehydration, product is transported in mixing and stirring tank by drag conveyor, and filtrate enters sedimentation centrifugate bucket and is delivered to concentration
Machine concentration, thickener underflow enter mixing and stirring tank after sending to fine grinding further in atomizer mill, and thickener overflow is defeated by pipeline
Send to sewage treatment plant, after dehydration product and thickener underflow formed after mixing and stirring tank is mixed chemical industry coal slurry at
Product are delivered to by coal slurry diaphragm pump and coal chemical industry user is stored and supplied in high concentration coal slurry tank directly use.This method energy consumption is high,
The relative complex point of process, although coal slurry particle size fraction is furnished with certain effect of optimization, coal-water fluid concentration increase rate is little.
As it can be seen that in the prior art for pipe water delivery coal slurry end product concentration promoted mode energy consumption is larger and efficiency compared with
It is low, deficiency is optimized to coal slurry size distribution, the more cause oxygen consumption of coarse granule increases in coal slurry and reaction is incomplete.
Summary of the invention
Energy consumption is larger and efficiency is lower for existing in the prior art, coal slurry size distribution is optimized it is insufficient, it is thick in coal slurry
The more cause oxygen consumption of particle increases and reacts the problems such as incomplete, and the present invention provides a kind of productions of raising pipeline transportation water-coal-slurry terminal
The method of product concentration.The method of the invention can optimize coal slurry grain size distribution, make concentration compared with pipeline end product
8~20 percentage points are at least promoted, and coal slurry mobility, stability and atomization greatly improve.
To achieve this purpose, the present invention adopts the following technical scheme:
The present invention provides a kind of methods for improving pipeline transportation water-coal-slurry end product concentration, and the method includes following
Step:
(1) it will partially manage defeated coal slurry and mix progress fine grinding with water and additive, obtain the first slurry；
(2) Ultrafine Grinding is carried out after partially managing defeated coal slurry, part steps (1) first slurry, water and additive mixing,
Obtain the second slurry；
(3) remaining step (1) first slurry and step (2) described second slurry are mixed to get third slurry；
(4) raw coal is managed defeated coal slurry, part steps (3) the third slurry, water and additive with residue to mix, is carried out wet
The 4th slurry is obtained after method ore grinding；
(5) step (4) the 4th slurry is mixed with remaining step (3) the third slurry, is obtained after screening removal of impurities
Finished product coal slurry.
The method of the invention is particularly suitable for improving the concentration of long-distance pipe transport water-coal-slurry end product, wherein institute
It states " long range " and refers to distance > 10km.
In the present invention, defeated coal slurry is managed in step (1) part and defeated coal slurry and step (4) are managed in step (2) described part
The remaining defeated coal slurry of pipe is considered as an entirety, therefore " part ", " part " and " residue " belongs to clear statement.
" by remaining step (1) institute described in " part steps (1) first slurry " described in step (2) and step (3)
State the first slurry " generally the first slurry described in step (1), therefore " part " and " residue " belongs to clear statement.
" remaining step (3) described the described in " part steps (3) the third slurry " and step (5) described in step (4)
Three slurries " generally step (3) the third slurry, therefore " part " and " residue " belongs to clear statement.
It is used as currently preferred technical solution below, but not as the limitation of technical solution provided by the invention, passes through
Following technical scheme can preferably reach and realize technical purpose and beneficial effect of the invention.
As currently preferred technical solution, the mass concentration of the defeated coal slurry of step (1) pipe be 30wt%~
55wt%, such as 30wt%, 35wt%, 40wt%, 45wt%, 50wt% or 55wt% etc., it is not limited to cited
Numerical value, other interior unlisted numerical value of the numberical range are equally applicable；Its largest particles≤3mm, such as 3mm, 2.6mm,
2.4mm, 2mm, 1.7mm or 1.5mm etc., it is not limited to cited numerical value, other interior unlisted numbers of the numberical range
It is worth equally applicable.That is the defeated coal slurry of low concentration pipe.
Preferably, manage 0~50wt% that defeated coal slurry is the defeated coal slurry quality of general pipeline for step (1) described part, such as 0,
10wt%, 20wt%, 30wt%, 40wt% or 50wt% etc., it is not limited to cited numerical value, in the numberical range its
His unlisted numerical value is equally applicable.
Preferably, step (1) additive is naphthalene sulfonic acid-formaldehyde condensation product and/or lignosulfonates, institute of the present invention
It is more excellent with naphthalene sulfonic acid-formaldehyde condensation product and/or lignosulfonates effect to state additive, it is not limited to the additive,
He is equally applicable to the present invention by prior art conventional additives.
Preferably, the butt additional amount of step (1) described additive is 0~0.5wt% of the first slurry butt inlet amount,
Such as 0.1w%, 0.2wt%, 0.3wt%, 0.4wt% or 0.5% etc., it is not limited to cited numerical value, the numerical value model
Other unlisted numerical value are equally applicable in enclosing.In the present invention, additive can also not be added according to the actual situation.
Preferably, step (1) particle for being finely ground to granularity≤75 μm in the first slurry in the first slurry accounting >=
60wt%, such as 60wt%, 65wt%, 70wt%, 80wt%, 90wt% or 100wt% etc., it is not limited to cited
Numerical value, other interior unlisted numerical value of the numberical range are equally applicable.
Preferably, step (1) fine grinding is using vertical grinding and/or horizontal grinding form.
Preferably, the mass concentration of step (1) first slurry be 30wt%~50wt%, such as 30wt%,
35wt%, 40wt%, 45wt% or 50wt% etc., it is not limited to cited numerical value, interior other of the numberical range are not arranged
The numerical value of act is equally applicable.
As currently preferred technical solution, it is the defeated coal slurry quality of general pipeline that defeated coal slurry is managed in step (2) described part
10wt%~50wt%, such as 10wt%, 20wt%, 30wt%, 40wt% or 50wt% etc., it is not limited to cited
Numerical value, other interior unlisted numerical value of the numberical range are equally applicable.
Preferably, step (2) additive is naphthalene sulfonic acid-formaldehyde condensation product and/or lignosulfonates.Institute of the present invention
It is more excellent with naphthalene sulfonic acid-formaldehyde condensation product and/or lignosulfonates effect to state additive, it is not limited to the additive,
He is equally applicable to the present invention by prior art conventional additives.
Preferably, the butt additional amount of step (2) described additive is 0~0.5wt% of the second slurry butt inlet amount,
Such as 0.1w%, 0.2wt%, 0.3wt%, 0.4wt% or 0.5% etc., it is not limited to cited numerical value, the numerical value model
Other unlisted numerical value are equally applicable in enclosing.In the present invention, additive can also not be added according to the actual situation.
Preferably, step (2) part steps (1) first slurry is step (1) described first stock quality
0wt%~95100wt%, for example, 0,5wt%, 10wt%, 20wt%, 30wt%, 40wt%, 50wt%, 60wt%,
70wt%, 80wt%, 90wt% or 95wt% etc., it is not limited to cited numerical value, interior other of the numberical range are not arranged
The numerical value of act is equally applicable.
As currently preferred technical solution, step (2) ultra-fine for being milled to granularity≤75 μm in the second slurry
Grain accounting >=80wt%, such as 80wt%, 85wt%, 90wt%, 95wt% or 100% etc. in the second slurry, but simultaneously not only
It is limited to cited numerical value, other unlisted numerical value are equally applicable in the numberical range.
Preferably, step (2) Ultrafine Grinding is using vertical grinding and/or horizontal grinding form.
Preferably, the mass concentration of step (2) second slurry be 30wt%~50wt%, such as 30wt%,
35wt%, 40wt%, 45wt% or 50wt% etc., it is not limited to cited numerical value, interior other of the numberical range are not arranged
The numerical value of act is equally applicable.
As currently preferred technical solution, the mass concentration of step (3) the third slurry be 30wt%~
50wt%, such as 30wt%, 35wt%, 40wt%, 45wt% or 50wt% etc., it is not limited to cited numerical value, it should
Other unlisted numerical value are equally applicable in numberical range.
Preferably, in step (3) the third slurry particle of granularity≤75 μm in third slurry accounting be >=
65wt%, such as 65wt%, 70wt%, 80wt%, 90wt% or 100wt% etc., it is not limited to cited numerical value, it should
Other unlisted numerical value are equally applicable in numberical range.
As currently preferred technical solution, step (4) raw coal is to pass through broken raw coal.
Preferably, described to be broken for being crushed to 0mm~6mm.
Preferably, total butt quality of step (1) first slurry and step (2) described second slurry accounts for step (5)
5wt%~40wt% of the finished product coal slurry butt quality, for example, 5wt%, 10wt%, 15wt%, 20wt%, 25wt%,
30wt%, 35wt% or 40wt% etc., it is not limited to cited numerical value, other interior unlisted numerical value of the numberical range
It is equally applicable.
In the present invention, regulate and control the ratio of total butt quality and raw coal butt quality in the first slurry and the second slurry, purpose
It is to regulate and control fine grained ratio shared in coal slurry, to improve the stability of coal slurry, optimization there is not the mobility of coal slurry.
Preferably, the butt quality of step (1) first slurry accounts for the 0 of step (5) the finished product coal slurry butt quality
~40wt%, such as 5wt%, 10wt%, 15wt%, 20wt%, 25wt%, 30wt%, 35wt% or 40wt% etc., but not
It is only limitted to cited numerical value, other unlisted numerical value are equally applicable in the numberical range.
Preferably, the butt quality of step (2) second slurry accounts for the 0 of step (5) the finished product coal slurry butt quality
~40wt%, such as 5wt%, 10wt%, 15wt%, 20wt%, 25wt%, 30wt%, 35wt% or 40wt% etc., but not
It is only limitted to cited numerical value, other unlisted numerical value are equally applicable in the numberical range.
Preferably, step (4) additive is naphthalene sulfonic acid-formaldehyde condensation product and/or lignosulfonates, institute of the present invention
It is more excellent with naphthalene sulfonic acid-formaldehyde condensation product and/or lignosulfonates effect to state additive, it is not limited to the additive,
He is equally applicable to the present invention by prior art conventional additives.
Preferably, the butt additional amount of step (4) described additive is 0.1wt%~1wt% of raw coal butt amount, such as
0.1wt%, 0.2wt%, 0.4wt%, 0.6wt%, 0.8wt% or 1wt% etc., it is not limited to the additive, other
Prior art conventional additives are equally applicable to the present invention.
Preferably, the concentration of step (4) the 4th slurry be 55wt%~70wt%, such as 55wt%, 60wt%,
65wt% or 70wt% etc., it is not limited to the additive, other prior art conventional additives are equally applicable to this hair
It is bright.
As currently preferred technical solution, step (4) wet milling is using vertical grinding and/or horizontal grinding
Form.
Preferably, step (4) described wet milling carries out in ball mill and/or rod mill.
Preferably, step (4) wet milling to granularity is 0~2.5mm.
As currently preferred technical solution, step (4) part steps (3) the third slurry is step (3)
20wt%~100wt% of the third stock quality, for example, 20wt%, 30wt%, 40wt%, 50wt%, 60wt%,
70wt%, 80wt%, 90wt% or 100wt% etc., it is not limited to cited numerical value, interior other of the numberical range are not arranged
The numerical value of act is equally applicable.
As currently preferred technical solution, the concentration of step (5) the finished product coal slurry is compared with the defeated coal of step (1) pipe
Concentration raising 8wt%~20wt% of slurry, such as 8wt%, 10wt%, 12wt%, 14wt%, 16wt% or 20wt% etc., but
It is not limited in the additive, other prior art conventional additives are equally applicable to the present invention.
Preferably, the particle of granularity≤75 μm accounting >=30wt% in finished product coal slurry in step (5) the finished product coal slurry,
Such as 30wt%, 35wt%, 40wt%, 45wt%, 50wt%, 55wt% or 60wt% etc., it is not limited to the addition
Agent, other prior art conventional additives are equally applicable to the present invention.
The slurrying coal that the herein described method for improving pipeline transportation water-coal-slurry end product concentration can be used is extensive,
Low-order coal especially suitable for more difficult grinding.
Compared with prior art, the invention has the following advantages:
(1) the method for the invention obtains screened stock by carrying out fine grinding and Ultrafine Grinding to the external defeated coal slurry of low concentration pipe
It with ultra-fine slurry, then will mix, fill into coal particle hole with slurry made from raw coal according to a certain percentage, and optimize coal slurry grain
Gradation is spent, the packing efficiency of coal slurry is improved, improves coal-water fluid concentration 8wt%~20wt%；And obtained coal slurry mobility, stability
It is greatly improved with atomization；
(2) high concentration finished product coal slurry made from the method for the invention, is able to satisfy fuel paste burning and gasification is starched in gasification
It is required that and the transformation efficiency of coal burning and gasification can be greatly improved；
(3) the method for the invention simple process, and it is able to achieve continuous production, parameter adjustment is efficient and convenient, preparation
High concentration finished product coal slurry is superior in quality.
Detailed description of the invention
Fig. 1 is the process signal for the method that pipeline transportation water-coal-slurry end product concentration is improved described in the embodiment of the present invention 1
Figure；
Fig. 2 is the process signal for the method that pipeline transportation water-coal-slurry end product concentration is improved described in the embodiment of the present invention 2
Figure.
Specific embodiment
In order to better illustrate the present invention, it is easy to understand technical solution of the present invention, below further specifically to the present invention
It is bright.But following embodiments is only simple example of the invention, does not represent or limit the scope of the present invention, this
Invention protection scope is subject to claims.
Specific embodiment of the invention part provides a kind of method for improving pipeline transportation water-coal-slurry end product concentration,
It the described method comprises the following steps:
(1) it will partially manage defeated coal slurry and mix progress fine grinding with water and additive, obtain the first slurry；
(2) Ultrafine Grinding is carried out after partially managing defeated coal slurry, part steps (1) first slurry, water and additive mixing,
Obtain the second slurry；
(3) remaining step (1) first slurry and step (2) described second slurry are mixed to get third slurry；
(4) raw coal is mixed with remaining coal slurry conveyed in pipeline, part steps (3) the third slurry, water and additive, into
The 4th slurry is obtained after row wet milling；
(5) step (4) the 4th slurry is mixed with remaining step (3) the third slurry, is obtained after screening removal of impurities
Finished product coal slurry.
The following are typical but non-limiting embodiments of the invention:
Embodiment 1:
A kind of method for improving pipeline transportation water-coal-slurry end product concentration is present embodiments provided, the present embodiment is used
The defeated coal slurry of low concentration pipe and raw coal used be Shenmu Shanxi area low-order coal, wherein analysis water Mad be 4.5wt%, Quan Shui
Mt is 15.3wt%, ash content Aad is 7.9wt%, volatile matter Vdaf is 28.8wt%.
As shown in Figure 1, the described method comprises the following steps:
(1) the defeated coal slurry of low concentration pipe that concentration is 50wt%, the largest particles≤2.4mm are chosen, coal slurry the liquidity scale is
13cm, coal slurry the liquidity scale test reference cement " GB/T8077-2012 Methods for testing uniformity of concrete admixture " industry
" flowing degree of net paste of cement " test method in standard, stability of coal slurry are syneresis rate 20% after placing 2 hours；
(2) the defeated coal slurry of low concentration pipe is mixed with water and additive according to mass ratio 30:7.6:0.05, is carried out after mixing thin
It is milled to the particles of granularity≤75 μm in the first slurry accounting 80wt% in the first slurry, obtains that mass concentration is 40wt%
One slurry；
(3) take the 50wt% of step (2) first slurry with the defeated coal slurry of part low concentration pipe and water, additive according to matter
Amount is mixed than 25:40:10.1:0.07, carries out the ultra-fine particle accounting 90wt% for being milled to granularity≤75 μm, obtaining mass concentration is
The second slurry of 40wt%；
(4) the first slurry described in remaining step (2) is mixed to get mass concentration with step (3) second slurry is
The third slurry of 40wt%, wherein the particle accounting 85wt% of granularity≤75 μm；
(5) raw coal is crushed to≤6mm, and with the defeated coal slurry of remainder low concentration pipe, the third slurry of 50wt%, water,
Additive obtains the 4th slurry that mass concentration is 68% through wet milling according to after the mixing of 30:43.75:27.5:5:0.21 ratio
Expect, wherein the particle accounting 32wt% of granularity≤75 μm；
(6) the 4th slurry is mixed with the third slurry of remaining 50wt%, obtain finished product coal slurry after screening removal of impurities, i.e., it is high
Concentration finished product coal slurry, finished product coal slurry mass concentration are 65wt%, and wherein the particle accounting of granularity≤75 μm is 38wt%, and coal slurry
The liquidity scale is 16cm, and stability is syneresis rate 10% after placing 8 hours.
Embodiment 2:
A kind of method for improving pipeline transportation water-coal-slurry end product concentration is present embodiments provided, the present embodiment is used
The defeated coal slurry of low concentration pipe and raw coal used be Ordos, inner Mongolia area low-order coal, wherein analysis water Mad be
5.5wt%, Quan Shui Mt are 18.5wt%, ash content Aad is 10.5wt%, volatile matter Vdaf is 25.7wt%.
As shown in Fig. 2, the described method comprises the following steps:
(1) the defeated coal slurry of low concentration pipe that concentration is 45wt%, the largest particles≤2mm are chosen, coal slurry the liquidity scale is
14cm, coal slurry the liquidity scale test reference cement " GB/T8077-2012 Methods for testing uniformity of concrete admixture " industry
" flowing degree of net paste of cement " test method in standard, stability of coal slurry are syneresis rate 25% after placing 2 hours；
(2) the defeated coal slurry of low concentration pipe is mixed with water and additive according to mass ratio 50:14.4:0.09, is carried out after mixing
It is finely ground to the particles of granularity≤75 μm in the first slurry accounting 75wt% in the first slurry, obtaining mass concentration is 35wt%'s
First slurry；
(3) it is passed through after taking low concentration pipe defeated coal slurry product in part to mix with water, additive according to mass ratio 50:14.4:0.09
The second slurry is obtained after Ultrafine Grinding, the mass concentration of the second slurry is 35wt%, and wherein the particle accounting of granularity≤75 μm is
95wt%；
(4) the first slurry described in remaining step (2) is mixed to get mass concentration with step (3) second slurry is
The third slurry of 35wt%, wherein the particle accounting 85wt% of granularity≤75 μm；
(5) raw coal is crushed to≤6mm, and through wet after mixing with water, additive according to 38.72:17.43:0.21 ratio
Method ore grinding obtains the 4th slurry that mass concentration is 69%, wherein the particle accounting 25wt% of granularity≤75 μm；
(6) the 4th slurry is mixed with third slurry by 56.15:128.96, obtain finished product coal slurry after screening removal of impurities, i.e., it is high
Concentration finished product coal slurry, finished product coal slurry mass concentration are 60wt%, and wherein the particle accounting of granularity≤75 μm is 60wt%, and coal slurry
The liquidity scale is 18cm, and stability is syneresis rate 12% after placing 8 hours.
Embodiment 3:
A kind of method for improving pipeline transportation water-coal-slurry end product concentration is present embodiments provided, the present embodiment is used
The defeated coal slurry of low concentration pipe and raw coal used be Ordos, inner Mongolia area low-order coal, form it is in the same manner as in Example 2.
The method is referring to method in embodiment 2, difference: the low concentration that concentration is 35wt% is chosen in step (1)
Manage defeated coal slurry；The concentration for the first slurry prepared in step (2) is 30wt%, and the particle accounting for being finely ground to granularity≤75 μm is
60wt%；The mass concentration for the second slurry that step (3) is prepared is 30wt%, and wherein the particle accounting of granularity≤75 μm is
80wt%.
High concentration finished product coal slurry made from the present embodiment, finished product coal slurry mass concentration are 62wt%, wherein granularity≤75 μm
Particle accounting be 45wt%, and coal slurry the liquidity scale be 19cm, stability be place 8 hours after syneresis rate 8%.
Embodiment 4:
A kind of method for improving pipeline transportation water-coal-slurry end product concentration is present embodiments provided, the present embodiment is used
The defeated coal slurry of low concentration pipe and the equal Shenmu Shanxi area low-order coal of raw coal used, form it is in the same manner as in Example 1.
The method is referring to method in embodiment 1, difference: the low concentration that concentration is 55wt% is chosen in step (1)
Manage defeated coal slurry；The concentration for the first slurry prepared in step (2) is 50wt%, and the particle accounting for being finely ground to granularity≤75 μm is
75wt%；The mass concentration for the second slurry that step (3) is prepared is 50wt%, and wherein the particle accounting of granularity≤75 μm is
90wt%.
High concentration finished product coal slurry made from the present embodiment, finished product coal slurry mass concentration are 63wt%, wherein granularity≤75 μm
Particle accounting be 45.6wt%, and coal slurry the liquidity scale be 17cm, stability be place 8 hours after syneresis rate 5%.
Comparative example 1:
This comparative example provides a kind of method for improving pipeline transportation water-coal-slurry end product concentration, used low concentration
Managing defeated coal slurry and raw coal used is Shenmu Shanxi area low-order coal, is formed in the same manner as in Example 1.
The method is referring to method in embodiment 1, difference: only with the first slurry as third slurry, i.e., no longer
The second slurry is prepared by Ultrafine Grinding.
Finished product coal slurry mass concentration made from this comparative example is 65wt%, and wherein the particle accounting of granularity≤75 μm is
33wt%, and coal slurry the liquidity scale is 15cm, stability is syneresis rate 10% after placing 8 hours.
Comparative example 2:
This comparative example provides a kind of method for improving pipeline transportation water-coal-slurry end product concentration, used low concentration
Managing defeated coal slurry and raw coal used is Shenmu Shanxi area low-order coal, is formed in the same manner as in Example 1.
The method is referring to method in embodiment 1, difference: only with the second slurry as third slurry, i.e., no longer
The first slurry is prepared by fine grinding.
Finished product coal slurry mass concentration made from this comparative example is 65wt%, and wherein the particle accounting of granularity≤75 μm is
46wt%, and coal slurry the liquidity scale is 17cm, stability is syneresis rate 8% after placing 8 hours.
It can be seen that the method for the invention with comparative example based on the above embodiments to pass through to the external defeated coal of low concentration pipe
Slurry carries out fine grinding and Ultrafine Grinding, obtains screened stock and ultra-fine slurry, then will mix, and fill out with slurry made from raw coal according to a certain percentage
Be charged in coal particle hole, optimize coal slurry grain size distribution, improve the packing efficiency of coal slurry, improve coal-water fluid concentration 8wt%~
20wt%；And obtained coal slurry mobility, stability and atomization greatly improves；
High concentration finished product coal slurry made from the method for the invention, is able to satisfy fuel paste burning and wanting for gasification is starched in gasification
It asks, and the transformation efficiency of coal burning and gasification can be greatly improved；
The method of the invention simple process, and be able to achieve continuous production, parameter adjustment is efficient and convenient, preparation it is highly concentrated
It is superior in quality to spend finished product coal slurry.
The Applicant declares that the present invention is explained by the above embodiments detailed process equipment and process flow of the invention,
But the present invention is not limited to the above detailed process equipment and process flow, that is, it is above-mentioned detailed not mean that the present invention must rely on
Process equipment and process flow could be implemented.It should be clear to those skilled in the art, any improvement in the present invention,
Addition, selection of concrete mode of equivalence replacement and auxiliary element to each raw material of product of the present invention etc., all fall within of the invention
Within protection scope and the open scope.
Claims (28)
1. a kind of method for improving pipeline transportation water-coal-slurry end product concentration, which is characterized in that the method includes following steps
It is rapid:
(1) it will partially manage defeated coal slurry and mix progress fine grinding with water and additive, obtain the first slurry, it is described to be finely ground to the first slurry
The particle of middle granularity≤75 μm accounting >=60wt% in the first slurry；
(2) Ultrafine Grinding is carried out after partially managing defeated coal slurry, part steps (1) first slurry, water and additive mixing, is obtained
Second slurry；
(3) remaining step (1) first slurry and step (2) described second slurry are mixed to get third slurry, it is described super
It is finely ground to the particles of granularity≤75 μm in the second slurry accounting >=80wt% in the second slurry；
(4) raw coal is managed defeated coal slurry, part steps (3) the third slurry, water and additive with residue to mix, carries out wet grinding mill
The 4th slurry is obtained after mine, wet milling to granularity is not more than 2.5mm；
(5) step (4) the 4th slurry is mixed with remaining step (3) the third slurry, obtains finished product after screening removal of impurities
Coal slurry.
2. the method according to claim 1, wherein the mass concentration of the defeated coal slurry of step (1) pipe is
30wt%~55wt%, the largest particles≤3mm.
3. the method according to claim 1, wherein it is the defeated coal slurry of general pipeline that defeated coal slurry is managed in step (1) part
0~50wt% of quality.
4. the method according to claim 1, wherein step (1) additive is naphthalene sulfonic acid-formaldehyde condensation product
And/or lignosulfonates.
5. the method according to claim 1, wherein the butt additional amount of step (1) described additive is first
0~0.5wt% of slurry butt inlet amount.
6. the method according to claim 1, wherein step (1) fine grinding using it is vertical grinding and/or it is horizontal
Grinding form.
7. the method according to claim 1, wherein the mass concentration of step (1) first slurry is
30wt%~50wt%.
8. the method according to claim 1, wherein it is the defeated coal slurry of general pipeline that defeated coal slurry is managed in step (2) part
10wt%~50wt% of quality.
9. the method according to claim 1, wherein step (2) additive is naphthalene sulfonic acid-formaldehyde condensation product
And/or lignosulfonates.
10. the method according to claim 1, wherein the butt additional amount of step (2) described additive is second
0~0.5wt% of slurry butt inlet amount.
11. the method according to claim 1, wherein step (2) part steps (1) first slurry
For 0wt%~95wt% of step (1) first stock quality.
12. the method according to claim 1, wherein step (2) Ultrafine Grinding using it is vertical grinding and/or
Horizontal grinding form.
13. the method according to claim 1, wherein the mass concentration of step (2) second slurry is
30wt%~50wt%.
14. the method according to claim 1, wherein the mass concentration of step (3) the third slurry is
30wt%~50wt%.
15. the method according to claim 1, wherein in step (3) the third slurry granularity≤75 μm
Grain accounting >=65wt% in third slurry.
16. the method according to claim 1, wherein step (4) raw coal is to pass through broken raw coal.
17. according to the method for claim 16, which is characterized in that the size of the broken raw coal is 0mm~6mm.
18. the method according to claim 1, wherein step (1) first slurry and step (2) described the
Total butt quality of two slurries accounts for 5wt%~40wt% of step (5) the finished product coal slurry butt quality.
19. the method according to claim 1, wherein the butt quality of step (1) first slurry accounts for step
(5) 0~40wt% of the finished product coal slurry butt quality.
20. the method according to claim 1, wherein the butt quality of step (2) second slurry accounts for step
(5) 0~40wt% of the finished product coal slurry butt quality.
21. the method according to claim 1, wherein step (4) additive is naphthalene sulfonic acid-formaldehyde condensation product
And/or lignosulfonates.
22. the method according to claim 1, wherein the butt additional amount of step (4) described additive is raw coal
0.1wt%~1wt% of butt amount.
23. the method according to claim 1, wherein the concentration of step (4) the 4th slurry be 55wt%~
70wt%.
24. the method according to claim 1, wherein step (4) wet milling using it is vertical grinding and/
Or horizontal grinding form.
25. the method according to claim 1, wherein step (4) described wet milling is in ball mill and/or stick
It is carried out in grinding machine.
26. the method according to claim 1, wherein step (4) part steps (3) the third slurry
For 20wt%~100wt% of step (3) the third stock quality.
27. method according to claim 1-8, which is characterized in that the concentration of step (5) the finished product coal slurry compared with
The concentration of the defeated coal slurry of step (1) pipe improves 8wt%~20wt%.
28. the method according to claim 1, wherein in step (5) the finished product coal slurry granularity≤75 μm
Grain accounting >=30wt% in finished product coal slurry.
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| CN111073715B (en) * | 2020-01-10 | 2023-10-27 | 陕西神渭煤炭管道运输有限责任公司 | Production equipment and production method for converting pipe coal slurry into gasified coal water slurry |
| CN111154522A (en) * | 2020-01-10 | 2020-05-15 | 陕西神渭煤炭管道运输有限责任公司 | Equipment for preparing pipe coal slurry and preparation method thereof |
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| CN1525104A (en) * | 2003-02-27 | 2004-09-01 | 刘月平 | Method for preparing coal water slurry |
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| CN105312003A (en) * | 2014-06-30 | 2016-02-10 | 中煤科工集团武汉设计研究院有限公司 | Terminal coal slurry dehydration and fine-grinding combined slurry production device and terminal coal slurry dehydration and fine-grinding combined slurry production method of long-distance pipeline |
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| EP0037832B1 (en) * | 1979-10-26 | 1984-08-29 | Alfred University Research Foundation, Inc. | Coal-water slurry and method for its preparation |
| CN1525104A (en) * | 2003-02-27 | 2004-09-01 | 刘月平 | Method for preparing coal water slurry |
| CN104164261A (en) * | 2013-05-20 | 2014-11-26 | 大唐国际化工技术研究院有限公司 | Method for increasing concentration of coarse water coal slurry |
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