CN109022074A - A kind of water-coal-slurry and preparation method thereof using interruption grain size distribution - Google Patents
A kind of water-coal-slurry and preparation method thereof using interruption grain size distribution Download PDFInfo
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- CN109022074A CN109022074A CN201811041736.8A CN201811041736A CN109022074A CN 109022074 A CN109022074 A CN 109022074A CN 201811041736 A CN201811041736 A CN 201811041736A CN 109022074 A CN109022074 A CN 109022074A
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- coal
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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
- C10L1/24—Organic compounds containing sulfur, selenium and/or tellurium
- C10L1/2431—Organic compounds containing sulfur, selenium and/or tellurium sulfur bond to oxygen, e.g. sulfones, sulfoxides
- C10L1/2437—Sulfonic acids; Derivatives thereof, e.g. sulfonamides, sulfosuccinic acid esters
Abstract
The invention discloses a kind of water-coal-slurry and preparation method thereof using interruption grain size distribution.The water-coal-slurry using interruption grain size distribution is made of coal dust, additive and water；Coal dust is that critical grain size~2.5mm coal dust A and granularity≤0.045mm coal dust B is formed by granularity；Critical grain size is 0.09~0.3mm.The method of the present invention realizes the control of particle-size distribution of coal-water slurry using the method that raw coal corase grinding is combined with coal dust isolation technics, and the packing efficiency of coal particle greatly improves, and coal-water fluid concentration can be respectively increased 5 and 2 percentage points or more compared with the first and second generation pulping technique.The method of the present invention whole process is wet process, safety and strong operability.Preparation method of the present invention is simple, is continous way production technology, meets water-coal-slurry preparation and the continuous of coal chemical industry enterprises, steady production requirement.
Description
Technical field
The present invention relates to a kind of water-coal-slurry and preparation method thereof using interruption grain size distribution, belong to COAL-WATER SLURRY TECHNOLOGY neck
Domain.
Background technique
The coal based fluid fuel and gasified raw material that water-coal-slurry is made of coal, water and additive, can be used for Industrial Boiler, kiln
The combustion power generation or gas supply of furnace and station boiler also can be used for coal gasification production synthesis ammonia, methanol, alkene, oil product and natural gas
Etc. chemical products.According to incompletely statistics, by the end of the end of the year 2017, China's fuel coal water slurry dosage is up to 30,000,000 tons/year, gasification
Water-coal-slurry dosage is more than 200,000,000 tons/year.With the large-scale promotion and application of fuel and gasified coal water slurry, water coal slurry concentration is inclined
Low bring problems gradually cause the concern of people, also become the major technology bottleneck of limitation water-coal-slurry industry development.According to
Measuring and calculating, coal-water fluid concentration is every to improve 1 percentage point, and 60kcal/kg can be improved in the calorific value of coal slurry, can reduce 10kg/kNm than coal consumption3,
10Nm can be reduced than oxygen consumption3/kNm3, effective 0.8 percentage point of the raising of gas ingredient, burning and gasification efficiency significantly improve.Therefore,
Advanced pulping technique is developed, water-coal-slurry grain size distribution is optimized, water coal slurry concentration is improved, improves the rheological characteristic and stabilization of water-coal-slurry
Property, it is the important topic of water-coal-slurry industry development urgent need to resolve.
The grain size distribution of water-coal-slurry is to influence the key factor of water coal slurry concentration, viscosity and rheological characteristic.But original water coal
Slurry preparation mostly uses single rod/ball mill pulping technique (first generation pulping technique), once grinds after feed coal is broken through stick/ball mill
Mill can be prepared by finished product coal slurry, and process flow is simple, cannot achieve the optimization of water-coal-slurry grain size distribution, the packing efficiency of coal particle
It is generally relatively low with coal-water fluid concentration.In recent years, with the continuous development of water-coal-slurry technology of preparing, second generation classified grinding water-coal-slurry system
Standby technology (publication number: 101173765 B of CN) is increasingly becoming the pulping technique of mainstream, which passes through kibbling mill and atomizer mill
Organic assembling, can realize the optimization of water-coal-slurry grain size distribution to a certain extent, coal slurry is dense compared with original pulping technique
Degree can be improved 3 percentage points or so.But the technology is that the fine grained that average grain diameter is 20 μm, granularity are supplemented in finished product water-coal-slurry
Gradation not up to effectively control, is only slightly improved in 45 μm of < of grain size intervals, the increase rate of water coal slurry concentration is limited, difficult
To meet the needs of water-coal-slurry industry development.
Summary of the invention
The object of the present invention is to provide a kind of water-coal-slurry and preparation method thereof using interruption grain size distribution easy to accomplish,
The present invention is interrupted the interval range of partial size by control pulverized coal particle, and fine grained is made to be sufficient filling with the hole of bulky grain formation, shape
At the closest packing state of ultrahigh in efficiency, water-coal-slurry grain size distribution is greatly optimized, and then improves coal-water fluid concentration.
Water-coal-slurry provided by the present invention using interruption grain size distribution, is made of coal dust, additive and water；
The coal dust is that critical grain size~2.5mm coal dust A and granularity≤0.045mm coal dust B is formed by granularity；
Critical grain size (the dpc) it is 0.09~0.3mm, it can be specifically adjusted according to the difference of coal dust coal.
In the present invention, the critical grain size (dpc) refer to separating the coal particle in the water-coal-slurry after primary corase grinding
Selected particle size values, i.e., with dpcFor boundary's point be 0~2.5mm by partial size in coal slurry coal particle (not including zero) be separated into 0~
dpcWith dpc~2.5mm coal particle.
In the water-coal-slurry, the mass ratio of the coal dust A and the coal dust B can be 1:0.1~1, concretely 1:0.25
~0.67,1:0.43~0.54,1:0.43 or 1:0.54.
In the water-coal-slurry, the butt quality ratio of the additive and the coal dust can be 0.2~1:100；
The mass percentage concentration of the water-coal-slurry can be 55~70%, concretely 61~66%, 61% or 66%；
The additive can be lignosulfonates (such as sodium lignin sulfonate), humate (such as humic acid sodium salt) and naphthalene
At least one of sulfonic formaldehyde condensation compound.
In the water-coal-slurry, the coal dust can be made of the coal of different rank, such as weakly caking coal, dross coal.
The present invention still further provides the preparation method of the water-coal-slurry, includes the following steps:
(1) granularity≤30mm coal dust, the additive and the water are mixed, obtains coal slurry A through corase grinding；The coal slurry
Pulverized coal particle partial size≤2.5mm in A；
(2) the coal slurry A is separated according to the critical grain size, obtains coal slurry B and coal slurry C；Coal in the coal slurry B
Powder particles partial size is the critical grain size~2.5mm, and pulverized coal particle partial size is 0~critical grain size in the coal slurry C；
(3) the coal slurry B obtains coal slurry D through dehydration；
(4) the coal slurry C successively obtains coal slurry G through settlement treatment, enrichment processing and extra-fine grinding, in the coal slurry G
Pulverized coal particle partial size≤0.045mm；
(5) the coal slurry D and coal slurry G is mixed to get the water-coal-slurry is arrived.
In above-mentioned preparation method, in step (1), the mass percentage concentration of the coal slurry A can be 40~65%；
Granularity≤30mm coal dust can be obtained through broken by feed coal；
In step (3), the mass percentage concentration of the coal slurry D can be 55~80%.
In above-mentioned preparation method, in step (4), the mass percentage concentration of the coal slurry E obtained through the settlement treatment can
It is 15~40%；
The mass percentage concentration of the coal slurry F handled through the enrichment can be 30~50%；
The mass percentage concentration of the coal slurry G handled through the extra-fine grinding can be 30~50%.
The particle-size distribution of coal-water slurry prepared through the method for the present invention are as follows: critical grain size (dpcThe quality of the coal particle of)~2.5mm
Percentage is 60~80wt%, 0mm~0.045mm (dpc) coal particle mass percent be 40~20wt%.
The present invention can be applied to gasified coal water slurry field using the high-concentration coal-water slurry of interruption grain size distribution.
The invention has the following advantages that
(1) the method for the present invention realizes particle-size distribution of coal-water slurry using the method that raw coal corase grinding is combined with coal dust isolation technics
Control, the packing efficiency of coal particle greatly improves, and 5 and 2 can be respectively increased compared with the first and second generation pulping technique in coal-water fluid concentration
It is more than percentage point.
(2) the method for the present invention whole process is wet process, safety and strong operability.
(3) preparation method of the present invention is simple, is continous way production technology, meets the company of water-coal-slurry preparation and coal chemical industry enterprises
Continuous, steady production requirement.
Detailed description of the invention
Fig. 1 is the mass percent of two kinds of size distributions in the high-concentration coal-water slurry of gap grading of the present invention.
Fig. 2 is the flow chart of preparation method of the present invention.
Specific embodiment
Experimental method used in following embodiments is conventional method unless otherwise specified.
The materials, reagents and the like used in the following examples is commercially available unless otherwise specified.
Embodiment 1, using interruption grain size distribution high-concentration coal-water slurry preparation
The feed coal of the present embodiment is Shenhua spy low ash coal: the coal blending (hereinafter referred to as " Shenhua of the mixed 1# coal=1:1 of mind
Coal "), full water Mt=16%, As-received ash content Aar=9%, As-received volatile matter Var=23%.
According to preparation flow shown in Fig. 2, the process for preparing high-concentration coal-water slurry using the feed coal is as follows:
(1) Firing Shenhua Coal is carried out being crushed to partial size≤30mm coal dust.
(2) coal dust of≤30mm is mixed and is roughly ground with process water, additive (lignosulfonates), obtaining concentration is
The coal slurry A of 50wt%, coal slurry A enter spiral classifier and are separated, and choose critical grain size dpc=0.2mm, obtaining concentration is
The coal slurry B and concentration of 60wt% is the coal slurry C of 25wt%, and wherein the coal particle size of coal slurry B is 0.2mm~2.5mm, coal slurry C's
Coal particle size is 0~0.2mm.
(3) as account for about Firing Shenhua Coal gross mass 70% partial size be 0.2mm~2.5mm coal dust composed by coal slurry B into
Enter dewaterer to be dehydrated, obtains the coal slurry D that concentration is 75wt%.
(4) the coal slurry C as composed by coal dust of the partial size less than 0.2mm for accounting for about Firing Shenhua Coal gross mass 30% enters subsider
It is settled, obtains the coal slurry E that concentration is 35wt%, coal slurry E enters enrichment device, obtains the coal slurry F that concentration is 45wt%, coal slurry
F enters super grinder and carries out extra-fine grinding, obtains the coal slurry G that concentration is 45wt%, and the granularity of pulverized coal particle is≤
0.045mm。
(5) by step (3) preparation coal slurry D and step (4) preparation coal slurry G mix, it is agitated uniformly obtain it is dense
Degree is the finished pulp of 66wt%, and size distribution is as shown in Figure 1.
In high-concentration coal-water slurry manufactured in the present embodiment, coal dust A (partial size is 0.2mm~2.5mm) and coal dust B (partial size≤
Mass ratio 0.045mm) is 1:0.43.
The stability of high-concentration coal-water slurry manufactured in the present embodiment is greater than not generating hard precipitating for 24 hours, and apparent viscosity is
880mPa.s (national standard≤1300mPa.s).
Embodiment 2, using interruption grain size distribution high-concentration coal-water slurry preparation
The feed coal of the present embodiment is Xinjiang Red Hill coal (hereinafter referred to as " Red Hill coal "), full water Mt=24%, Aar=
14%, Var=30%.
(1) Red Hill coal is carried out being crushed to partial size≤30mm coal dust.
(2) by the coal dust of≤30mm and process water, additive, (naphthalenesulfonate formaldehyde condensation compound and lignosulfonates are answered
With object) it mixes and is roughly ground, the coal slurry A that concentration is 45wt% is obtained, coal slurry A enters grader and separated, and chooses critical grain
Diameter dpc=0.15mm obtains the coal slurry B that concentration is 55wt% and the coal slurry C that concentration is 32wt%, wherein the coal particle size of coal slurry B
For 0.15mm~2.5mm, the coal particle size of coal slurry C is 0~0.15mm.
(3) as account for about Red Hill coal gross mass 65% partial size be 0.15mm~2.5mm coal dust composed by coal slurry B into
Enter dewaterer to be dehydrated, obtains the coal slurry D that concentration is 68wt%；
(4) the coal slurry C as composed by coal dust of the partial size less than 0.15mm for accounting for about Red Hill coal gross mass 35% enters sedimentation
Slot is settled, and the coal slurry E that concentration is 40wt% is obtained, and coal slurry E enters super grinder and carries out extra-fine grinding, and obtaining concentration is
The coal slurry F of 40wt%, the granularity of pulverized coal particle are≤0.045mm；
(5) by step (3) preparation coal slurry D and step (4) preparation coal slurry F mix, it is agitated uniformly obtain it is dense
Degree is the finished pulp of 61wt%.
In high-concentration coal-water slurry manufactured in the present embodiment, coal dust A (partial size is 0.15mm~2.5mm) and coal dust B (partial size≤
Mass ratio 0.045mm) is 1:0.54.
The stability of high-concentration coal-water slurry of the present invention is, greater than hard precipitating is not generated for 24 hours, apparent viscosity is 960mPa.s (state
Family standard≤1300mPa.s).
Claims (6)
1. a kind of water-coal-slurry using interruption grain size distribution, is made of coal dust, additive and water；
The coal dust is that critical grain size~2.5mm coal dust A and granularity≤0.045mm coal dust B is formed by granularity；
The critical grain size is 0.09~0.3mm.
2. water-coal-slurry according to claim 1, it is characterised in that: the mass ratio of the coal dust A and coal dust B is 1:
0.1~1.
3. water-coal-slurry according to claim 1 or 2, it is characterised in that: the butt quality of the additive and the coal dust
Than for 0.2~1:100；
The mass percentage concentration of the water-coal-slurry is 55~70%；
The additive is at least one of lignosulfonates, humate and naphthalene sulfonic acid-formaldehyde condensation product.
4. the preparation method of water-coal-slurry described in any one of claim 1-3, includes the following steps:
(1) granularity≤30mm coal dust, the additive and the water are mixed, obtains coal slurry A through corase grinding；In the coal slurry A
Pulverized coal particle partial size≤2.5mm；
(2) the coal slurry A is separated, obtains coal slurry B and coal slurry C；Pulverized coal particle partial size is described critical in the coal slurry B
Partial size~2.5mm, pulverized coal particle partial size is 0~critical grain size in the coal slurry C；
(3) the coal slurry B obtains coal slurry D through dehydration；
(4) the coal slurry C successively obtains coal slurry G through settlement treatment, enrichment processing and extra-fine grinding, the coal dust in the coal slurry G
Grain diameter≤0.045mm；
(5) the coal slurry D and coal slurry G is mixed to get the water-coal-slurry is arrived.
5. the preparation method according to claim 4, it is characterised in that: in step (1), the quality percentage of the coal slurry A is dense
Degree is 40~65%；
In step (3), the mass percentage concentration of the coal slurry D is 55~80%.
6. preparation method according to claim 4 or 5, it is characterised in that: in step (4), obtained through the settlement treatment
Coal slurry E mass percentage concentration be 15~40%；
The mass percentage concentration of the coal slurry F handled through the enrichment is 30~50%；
The mass percentage concentration of the coal slurry G handled through the extra-fine grinding is 30~50%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109833968A (en) * | 2019-03-27 | 2019-06-04 | 煤科院节能技术有限公司 | A kind of gravity sedimentation type water-coal-slurry grader |
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| CN207562817U (en) * | 2017-11-22 | 2018-07-03 | 中煤科工清洁能源股份有限公司 | A kind of system for improving pipeline transportation water-coal-slurry end product concentration |
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| CN109833968A (en) * | 2019-03-27 | 2019-06-04 | 煤科院节能技术有限公司 | A kind of gravity sedimentation type water-coal-slurry grader |
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Address after: 100013 No. 5 Youth Road, Chaoyang District, Beijing, Hepingli Patentee after: Beijing Tiandi Sunac Technology Co.,Ltd. Patentee after: CCTEG CHINA COAL Research Institute Address before: 100013 No. 5 Youth Road, Chaoyang District, Beijing, Hepingli Patentee before: CHINA COAL RESEARCH INSTITUTE (CCRI) ENERGY SAVING TECHNOLOGY CO.,LTD. Patentee before: CCTEG CHINA COAL Research Institute |
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