CN101985571A - Method for preparing water coal slurry - Google Patents
Method for preparing water coal slurry Download PDFInfo
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- CN101985571A CN101985571A CN2010105199920A CN201010519992A CN101985571A CN 101985571 A CN101985571 A CN 101985571A CN 2010105199920 A CN2010105199920 A CN 2010105199920A CN 201010519992 A CN201010519992 A CN 201010519992A CN 101985571 A CN101985571 A CN 101985571A
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Abstract
The invention discloses a method for preparing water coal slurry, which comprises the following steps of: crushing raw material coal, conveying the crushed coal to a first mill through a surge bin and a feeder, controlling over 90 percent of milled granules to pass through a sieve with fineness of over 325 meshes in the first mill, conveying 20 to 30 percent of the weight of the discharged material of the first mill to a second mill, milling the discharged material till over 90 percent of granules can pass through a sieve of 500 to 600 meshes, mixing the materials in the second mill, then performing high shearing treatment, screening the slag, and regulating and storing the slurry to obtain the water coal slurry. The coal content of the conventional water coal slurry is improved to about 65 to 67 percent from about 60 percent so that the integral heat value is improved by 6 to 8 percent. The method can improve the coal milling process and has simple flow and compact layout.
Description
Technical field
The present invention relates to the preparation technology of coal water slurry.
Background technology
Existing coal water slurry is by about 60% coal, 39% water and a small amount of chemical additive are made, it is a kind of fuel slurry, can be as oil pumping, atomizing, storage and stable burning, its calorific value is equivalent to half of oil fuel, can replace oil fuel to be used for boiler, power station, industrial furnace and kiln and civilian heating, is used to replace coal to use, have burning high efficiency, load adjustment facility, reduce environmental pollution, improve working conditions and save with advantages such as coals, enterprise obtains favorable economic benefit.So COAL-WATER SLURRY TECHNOLOGY not only can be used for generation oil, is used for for coal energy-conservation and environmental benefit being arranged also.No matter remain the importance that efficient improves in the coal water slurry application but satisfy the raising of stablizing solid content under the condition that flows with pump, be that coal water slurry is in the application of Coal Chemical Industry or the application in the fuel.
Because traditional coal-fired mode causes the historical lessons of serious topsoil not allow to reappear.So coal liquefaction, vaporization and pulp become the research topic that industrially-advanced country generally payes attention to.Coal water slurry then is the best achievement of coal liquefaction, also is the most cheap practical technique of coal clean utilization.The preparation devices needed of existing coal water slurry coal water slurry is mature on the whole, and as starching through high shear treatment, the storage of sizing mixing through fragmentation, surge bunker, feeding machine, ball milling, screening reject referring to Fig. 1 feed coal, obtains coal water slurry again.
Pump is strengthened in special-purpose colour strainer of CN200420079013.4 and the special-purpose high-shear of CN200420079012.X coal water slurry, and the rotating speed of this powerful shearing pump is low, and energy consumption is low, friction, and low noise, easy to maintenance.Through the coal water slurry of intensive treatment, can significantly improve its rheological characteristics and stability, for stable the playing an important role that guarantees the coal water slurry quality product.
The CN02109148.X method for producing water coal slurry, comprise impurity removing, pulverizing, collection, mixing, storage slurry, wherein circuit grinding adopts and has left and right hammer dish and be assembled in the multistage pulverizing of same transmission shaft, the coal pulverizer of free function with fan, mixture length adopts premix mixing tank and the intimate mixing colloidal mill that has agitator, between coal pulverizer and mixing tank dust collection is set.
CN200310104934.1 discloses a kind of coal water slurry preparation and has pressed grinding process, it comprises precrushing, pulverizing and stirring pulping operation, in pulverizing process with roll squeezer as disintegrating apparatus, and by roll squeezer with ball mill and break up the organic of powder separating machine and cooperate, the coal water slurry of creating high yield and low cost is pressed and is ground technology fully.
The CN01114277.4 superfine high-density coal-water fluid producing system, constitute by ultrafine crusher, agitator-conveyor, tower colloidal mill, coal slurry pump, fine powder collector, quantitative powder feeding equipment, dried fine powder relief outlet and fine powder collector pipe connection on the ultrafine crusher body top, slurry relief outlet, coal slurry pump, tower colloidal mill, dispersator pipe connection on agitator-conveyor and the intravital cone of ultrafine crusher machine, coal slurry pump is installed in tower colloidal mill both sides respectively.It has changed existing coal water slurry production method, and collection dry method grinding and wet grinding are one, and its fineness of pulverized coal can reach more than 600 orders, and the adjustable slurry concentration of economizing on coal, and grinding, slurrying are once finished in production system.
CN200910020829.7 provides a kind of method of comprehensive utilization of coal water slurry gasified waste residue on Texaco gasifier, by prepare the fusing assistant (needing to add) that adds capacity in the gasification in coal water slurry according to the difference of coal ash fusion point, under the prerequisite that does not change Inferior of Texaco Gasification Technology, the alkaline coefficient of the feasible waste residue that is produced is greater than 1.0, then by the gravity separation measure, high carbonaceous particles is separated with silicate glass matter clinker, utilize the calorific value of high carbonaceous particles in silicate glass matter clinker grinding process, to dry, obtain specific surface area at last greater than 350M2/KG, moisture content realizes effectively utilizing the purpose of texaco coal-water slurry gasification waste residue less than the high reactivity slag powders that is used for cement or concrete industry of 1WT%.
Summary of the invention
The present invention seeks to: propose a kind of preparation method of coal water slurry, the content from about 60% coal in the existing coal water slurry is brought up to about 65%-67%, this can make whole calorific value improve 6-8%.Certainly the present invention can improve coal-grinding technology and makes and have that flow process is simple, compact in design, can produce high-concentration coal-water slurry.
Technical scheme of the present invention is: the preparation method of coal water slurry, feed coal grinds particle is crossed the above fineness of 325 orders more than 90% sieve through fragmentation, surge bunker, feeding machine to the first road grinding machine, the first road grinding machine control, the 20-30% of the weight of the discharging of the first road grinding machine is through the second road grinding machine, be milled to 90% above particle and cross 500 to 600 mesh sieves, the mixed again after screening reject of the material of two road grinding machines, make the granularity optimization of coal slurry, the combination of dwindling coal particle and water obtains coal water slurry.Or starch through screening reject, the storage of sizing mixing through high shear treatment again after mixed, obtain coal water slurry.
The present invention especially grinding process adopts the rod milling technology generations for ball-milling technology at least together.
The invention has the beneficial effects as follows: adopt technology of the present invention can produce ultra-thin slurries, can also realize the configuration of coal water slurry particulate from 325 to 600 purposes, the direct result of this configuration is can prepare to produce high-concentration coal-water slurry.Adopt slurries additive agent commonly used when the present invention prepares coal water slurry, in (identical water temperature with identical other condition under) under the existing code requirement of stablize fate, the solid content of coal is brought up to about 65%-67%, this can make whole calorific value raising 6-8%.Especially the present invention makes the fine coal of coal water slurry can adopt rod milling technical process efficiently, than the efficient height of ball milling, realizes that coal water mixture plant maximizes, and is doubled the masher ability.Reduce table of equipment number and affiliated facility, reduction is thrown and is cut down the consumption of energy, and the reduction mill is situated between and consumes 30～100%.Carry out the adjustment and the control of technology, operation easily.
Description of drawings
Fig. 1 is the coal water slurry process schema before the present invention
Fig. 2 is a process flow sheet of the present invention.
Embodiment
1, the preparation method of first kind of coal water slurry, feed coal grinds particle through fragmentation, surge bunker, feeding machine to the first road ball milling, the first road ball milling control and crosses 325 mesh sieves more than 90%, the weight of the discharging of the first road ball milling 20% through the second road ball milling, be milled to 90% above particle and cross 600 mesh sieves, the mixed again after screening reject of the material of two road ball millings, the storage slurry of sizing mixing obtain coal water slurry.Or starch through screening reject, the storage of sizing mixing through high shear treatment again after mixed, obtain coal water slurry.Join the solid content of the coal behind the slurry and bring up to 65%.
2, the preparation method of second kind of coal water slurry, feed coal grinds particle through fragmentation, surge bunker, feeding machine to the first road ball milling, the first road ball milling control and crosses 400 mesh sieves more than 90%, the weight of the discharging of the first road ball milling 30% through the second road rod milling, be milled to 90% above particle and cross 600 mesh sieves, the mixed again after screening reject of the material of the second road rod milling, the storage slurry of sizing mixing obtain coal water slurry.Or starch through screening reject, the storage of sizing mixing through high shear treatment again after mixed, obtain coal water slurry.Joining the solid content of the coal behind the slurry brings up to more than 65%.
3, the preparation method of the third coal water slurry, feed coal grinds particle through fragmentation, surge bunker, the rod milling of feeding machine to the first road, the first road rod milling control and crosses 325 mesh sieves more than 90%, the weight of the discharging of the first road rod milling 30% through the second road rod milling, be milled to 90% above particle and cross 600 mesh sieves, the mixed again after screening reject of the material of two road rod millings, the storage slurry of sizing mixing obtain coal water slurry.Or starch through screening reject, the storage of sizing mixing through high shear treatment again after mixed, obtain coal water slurry.
Grinding process of the present invention adopts the rod milling technology generations for ball-milling technology.Join the solid content of the coal behind the slurry and bring up to 65%-67%.
By method of the present invention the solid content of coal is brought up to about 65%-67%, this can make whole calorific value improve 6-8%.Especially the present invention makes the fine coal of coal water slurry can adopt rod milling technical process efficiently, than the efficient height of ball milling, realizes that coal water mixture plant maximizes, and is doubled the masher ability.Reduce table of equipment number and affiliated facility, reduction is thrown and is cut down the consumption of energy, and the reduction mill is situated between and consumes 30～100%.Carry out the adjustment and the control of technology, operation easily.
Claims (5)
1. the preparation method of coal water slurry, it is characterized in that feed coal through broken, give coal bunker, Weighing feeder to the first road grinding machine, the mill control of first road grind particle 90% or more the sieve of the above fineness of 325 orders, the 20-30% of the weight of the discharging of the first road grinding machine is through the second road grinding machine, be milled to 90% above particle and cross 500 to 600 mesh sieves, the mixed again after screening reject of the material of two road grinding machines, the storage slurry of sizing mixing obtain coal water slurry.
2. the preparation method of coal water slurry, it is characterized in that feed coal grinds particle is crossed the above fineness of 325 orders more than 90% sieve through fragmentation, surge bunker, feeding machine to the first road grinding machine, the first road grinding machine control, the 20-30% of the weight of the discharging of the first road grinding machine is through the second road grinding machine, be milled to 90% above particle and cross 500 to 600 mesh sieves, starch through screening reject, the storage of sizing mixing through high shear treatment again after the material of two road grinding machines is mixed, obtain coal water slurry.
3. require the preparation method of 1 or 2 described coal water slurry according to patent, it is characterized in that adopting rod milling technology at least together in the two road ball millings.
4. require the preparation method of 1 or 2 described coal water slurry according to patent, it is characterized in that all adopting rod milling technology in the two road ball millings.
5. require the preparation method of 1 or 2 described coal water slurry according to patent, it is characterized in that adopting in the second road ball milling rod milling technology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105199920A CN101985571A (en) | 2010-10-26 | 2010-10-26 | Method for preparing water coal slurry |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105199920A CN101985571A (en) | 2010-10-26 | 2010-10-26 | Method for preparing water coal slurry |
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| CN101985571A true CN101985571A (en) | 2011-03-16 |
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| CN2010105199920A Pending CN101985571A (en) | 2010-10-26 | 2010-10-26 | Method for preparing water coal slurry |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103242918A (en) * | 2013-05-16 | 2013-08-14 | 江苏神瑞新能源有限公司 | Method for preparing high-concentration water-coal slurry by using flotation clean coals |
| CN103464266A (en) * | 2013-09-17 | 2013-12-25 | 朱回军 | High-concentration dry-method pulping process of grinding machine |
| CN107987905A (en) * | 2017-12-11 | 2018-05-04 | 南京大学 | A kind of method that dry and wet joint ore grinding prepares high concentration coal blending water-coal-slurry |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062754A (en) * | 1990-12-21 | 1992-07-15 | 日本科姆株式会社 | The preparation method of high-concentration coal-water slurry |
| CN1525104A (en) * | 2003-02-27 | 2004-09-01 | 刘月平 | Method for preparing coal water slurry |
| CN101451082A (en) * | 2008-12-30 | 2009-06-10 | 中国科学院工程热物理研究所 | Method for preparing bituminous coal slurry |
-
2010
- 2010-10-26 CN CN2010105199920A patent/CN101985571A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062754A (en) * | 1990-12-21 | 1992-07-15 | 日本科姆株式会社 | The preparation method of high-concentration coal-water slurry |
| CN1525104A (en) * | 2003-02-27 | 2004-09-01 | 刘月平 | Method for preparing coal water slurry |
| CN101451082A (en) * | 2008-12-30 | 2009-06-10 | 中国科学院工程热物理研究所 | Method for preparing bituminous coal slurry |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103242918A (en) * | 2013-05-16 | 2013-08-14 | 江苏神瑞新能源有限公司 | Method for preparing high-concentration water-coal slurry by using flotation clean coals |
| CN103464266A (en) * | 2013-09-17 | 2013-12-25 | 朱回军 | High-concentration dry-method pulping process of grinding machine |
| CN107987905A (en) * | 2017-12-11 | 2018-05-04 | 南京大学 | A kind of method that dry and wet joint ore grinding prepares high concentration coal blending water-coal-slurry |
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Application publication date: 20110316 |