CN103807867A - Method for manufacturing coal water slurry by high-pressure roll milling - Google Patents
Method for manufacturing coal water slurry by high-pressure roll milling Download PDFInfo
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- CN103807867A CN103807867A CN201210444208.3A CN201210444208A CN103807867A CN 103807867 A CN103807867 A CN 103807867A CN 201210444208 A CN201210444208 A CN 201210444208A CN 103807867 A CN103807867 A CN 103807867A
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Abstract
The invention relates to the field of the coal chemical industry, in particular to a method for manufacturing coal water slurry by high-pressure roll milling. The technical scheme is as follows: the method comprises the following steps of pre-crushing: forming a squeezing system by utilizing two horizontal squeezing rolls which synchronously rotate in opposite directions, feeding raw material coal into a cavity between the two rolls through a feeding device, and crushing the raw material coal under the pressure; stirring and pulping: mixing the crushed pulping particles with additives and water, and stirring the mixture into coal water slurry. The method has the following beneficial effects that the structure is compact, the investment of capital construction with the help of a high-pressure roll mill can be saved by about 25-30% compared with a grinding system with the same production capacity requirement, the structure is simple, and higher convenience in operation and repairing is realized. Dust of the high-pressure roll mill is little, the noise is low, the working environment is greatly improved, and the human-oriented design concept can be reflected.
Description
Technical field
The present invention relates to coal chemical technology, relate in particular to the method for high pressure roller mill making water-coal-slurry.
Background technology
Along with the expansion of this several years Coal Chemical Engineering Projects, the whole nation starts the upsurge of one Development of Coal Chemical Industry, and national each large enterprises all drop in the main forces of Coal Chemical Industry one after another, and Xinjiang and the Inner Mongol become the first place of each large enterprises; Investment at least several hundred million at most the project of over ten billion again and again occur, these coal chemical industry enterprises are all to do raw material with high-concentration coal-water slurry, high-concentration coal-water slurry CQM quality requirement: concentration: 60%-70%;
Viscosity :≤150mpas (100s-125 ℃);
Particle diameter: average 40-45 μ m 0.06mm;
Caloric value: 4500-5000Kcai/kg;
So the fragmentation of coal becomes the first problem of these projects, no matter be that standby coal measures is united or the broken coal handling system of boiler all has a lot of reasons to the selection of disintegrating machine, market occurs that maximum equipment selections mainly contains several now: disintegrating machine has reversible counterattack ring hammer coal breaker, four discaling rolls to sieve broken one disintegrating machine, import disintegrating machine.Cannot meet present production requirement.What require along with CHINESE INDUSTRIES policy adjustment with to industry " energy-conservation, reduce discharging " puts more effort, and energy-conservation, efficient disintegrating apparatus is paid attention to widely in industry-by-industry application, and new technology, new product, new technology have obtained wideling popularize and using.But do not have at present a kind of suitable technique to carry out this kind of technique.
Summary of the invention
The object of invention: in order to provide the one can be efficient, the friendly process of energy-conserving and environment-protective ground production water-coal-slurry.
In order to reach as above object, the present invention takes following technical scheme: comprise following steps:
● precomminution: the compression roller composition extrusion system of two horizontal settings and in opposite directions synchronous rotary, feed coal enters the material chamber between two rollers by charging gear, feed coal pressurized and pulverizing;
● stir pulping: after slurrying particle additive package, water after processing is pulverized, stir and become water-coal-slurry.
Adopt as above the present invention of technical scheme, at least soluble problem is: making original manufacture craft multi-step become little step can complete, and simple flow greatly reduces energy consumption, saves to produce and expends, and makes the product quality of production better.
The further technical scheme of the present invention is, also comprises the step of ball mill ball milling after described step precomminution, and described ball mill ball milling is wet-milling, and wet-milling process adds water and additive.
The further technical scheme of the present invention is, after described step precomminution, also comprises and breaks up the step of selecting powder, breaks up rear screening grain diameter, after the partly or entirely direct additive package of qualified pulverized particles, water, stirs and becomes water-coal-slurry; The inappropriate pulverized particles of particle diameter is partly or entirely entered to ball mill ball milling by it.
The further technical scheme of the present invention is, after described step precomminution, also comprises and breaks up the step of selecting powder, breaks up rear screening grain diameter, breaks up the rear powder that selects the qualified particle diameter of powder and enters next process; Underproof pulverized particles is entered to high-pressure roller mill and again carry out high pressure roller mill
The further technical scheme of the present invention is, described feed coal particle diameter is R, 0mm < R≤80mm.
Adopt as above the present invention of technical scheme, there is following beneficial effect:
Select the production scale of factory larger, dwindle ore mill give ore particle footpath (being contracted to 3mm from traditional approximately 12mm even less), the economic effect of generation is larger.The particle diameter that improves ore milling product distributes, for more favorably process conditions are created in next procedure.In grinding system, equip high-pressure roller mill, can make the production capacity of milling equipment be given full play to, generally can improve output 309%-40%, total energy consumption can reduce 20%-30%.It is low that high-pressure roller mill is pulverized power consumption, can improve ball mill slurrying capacity for precomminution feed coal, and the power consumption of water-coal-slurry product can reduce below 30%.Compact conformation, the grinding system requiring for identical production capacity, equipment high-pressure roller mill can be saved the about 25%-30% of capital expenditure.Simple in structure, operating maintenance is more convenient.High-pressure roller mill dust is few, and noise is low, and working environment has larger improvement, embodies the design concept of " people-oriented ".High-pressure roller mill is introduced in water-coal-slurry preparation can increase substantially coal water mixture plant production capacity, and on the basis of original ball mill production capacity, output can be doubled.Adopt high-pressure roller mill all to replace or partly replace ball mill slurrying, mill is situated between and consumes and can all or part ofly exempt.Water-coal-slurry industry is introduced high-pressure roller mill, improves high-pressure roller mill technological parameter by COAL-WATER SLURRY TECHNOLOGY requirement, and innovation slurries production technology, adjusts operation, must obtain and improve output and energy-conservation bumper harvests, will promote the development of water-coal-slurry industry.
Accompanying drawing explanation
Fig. 1 is high-pressure roller mill roll-in precomminution process chart;
Fig. 2 is high-pressure roller mill roll-in selective separation process flow chart;
Fig. 3 is the full powder craft flow chart of high-pressure roller mill;
Fig. 4 is the process chart of background technology;
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described;
In conjunction with Fig. 1;
Feed coal is directly sent into ball mill after by high-pressure roller mill roll-in precomminution, adds water and additive carries out defibrination toward ball mill simultaneously.This technological process is simple, and equipment is few, adopts pulping with high density.To newly-built slurry factory or expand existing slurry factory production capacity and be doubled, it is small investment, the fast effective way of going into operation.
In conjunction with Fig. 2;
High-pressure roller mill is pulverized feed coal, select powder through breaing up powder concentrator again, is greater than the coal of setting grain-size grade and returns to high-pressure roller mill entrance and pulverize; Be less than the coal of setting grain-size grade and send into ball mill, add water and additive mixer mill is made slurry simultaneously.
High-pressure roller mill selective separation process flow process, in this technological process, breaing up and selecting powder operation is to improve output, product quality and improve the particle diameter very effective link that distributes.
In conjunction with Fig. 3;
After high-pressure roller mill is pulverized feed coal, then select powder through breaing up powder concentrator, the coal of selecting slurrying off grade size level returns to high-pressure roller mill entrance and pulverizes; Select the coal of the qualified grain-size grade of slurrying and send into ball mill, add water and additive simultaneously, grind pulping through ball mill inspection.Also the coal dust of the qualified grain-size grade of slurrying can be sent into agitating device, add water and additive to stir pulping simultaneously.
In conjunction with Fig. 4;
Background technology takes multiple working procedure and adjuvant to carry out.
In conjunction with Fig. 1-Fig. 4, known:
Utilize after new technology, operation greatly reduces, and operation is simplified greatly.
Above three kinds of technological processes volume increase and energy-conservation aspect have very big difference, but with (traditional handicraft) disintegrating machine and the comparison of ball mill group technology flow process, calculate that energy-conservation scope is as follows:
A) high-pressure roller mill precomminution technological process can save energy 30%;
B) high-pressure roller mill selective separation process flow process can save energy 30%-50%;
C) the full powder craft flow process of high-pressure roller mill can save energy > 50%;
In addition, attenuate because high-pressure roller mill precomminution makes material particular diameter, cause the loss of ball mill to reduce, make to produce more smooth.
High-pressure roller mill drops into water-coal-slurry preparation technology, requires the performance of high-pressure roller mill to have good adaptability to coal crushing; The simultaneously proterties of the coal processing that also can improve in high-pressure roller mill.In order to obtain optimum operation effect, coal proterties is had to ask for something:
A. the particle diameter of feeding
The 3.5-4 that feeding particle diameter should not be greater than nip doubly can adapt to production requirement.Feeding particle diameter can allow at 0-80mm.Feeding particle diameter forms, packing is lower all has significantly affecting to the output of high-pressure roller mill.
B. the grindability of material
The erosive index of coal indicates the complexity of comminuted coal.The composition more complicated of coal, Coal rank has different grindabilitys.Grindability is also to pulverize the foreseeable means of consumption.
Generally speaking, high-pressure roller mill can only be dry grinded, but the material passing through a roll-in can not reach the technical requirement that preparation water-coal-slurry particle diameter distributes.Select high-pressure roller mill and ball mill combination, high-pressure roller mill, as precomminution, is sent into ball mill and is possessed lot of advantages with wet type defibrination after pulverizing.A high-pressure roller mill production capacity is larger, and after pulverizing, briquette can be for number table grinder; Or select the circulation of coarse grain feedback, until meet the particle diameter requirement of water-coal-slurry.Described particle diameter is particle diameter.
Contrast below the difference of this technique and traditional handicraft with the form of subordinate list;
More than show and described basic principle of the present invention, principal character and advantage of the present invention.Those skilled in the art should understand the present invention and not be restricted to the described embodiments; that in above-described embodiment and description, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in claimed scope.
Claims (5)
1. high pressure roller mill is made the method for water-coal-slurry, it is characterized in that, comprises following steps:
● precomminution: the compression roller composition extrusion system of two horizontal settings and in opposite directions synchronous rotary, feed coal enters the material chamber between two rollers by charging gear, feed coal pressurized and pulverizing;
● stir pulping: after slurrying particle additive package, water after processing is pulverized, stir and become water-coal-slurry.
2. high pressure roller mill as claimed in claim 1 is made the method for water-coal-slurry, it is characterized in that, after described step precomminution, also comprise the step of ball mill ball milling, described ball mill ball milling is wet-milling, and wet-milling process adds water and additive.
3. high pressure roller mill as claimed in claim 1 is made the method for water-coal-slurry, it is characterized in that, after described step precomminution, also comprise and break up the step of selecting powder, break up rear screening grain diameter, after the partly or entirely direct additive package of qualified pulverized particles, water, stir and become water-coal-slurry; The inappropriate pulverized particles of particle diameter is partly or entirely entered to ball mill ball milling by it.
4. high pressure roller mill as claimed in claim 1 is made the method for water-coal-slurry, it is characterized in that, after described step precomminution, also comprises and breaks up the step of selecting powder, breaks up rear screening grain diameter, breaks up the rear powder that selects the qualified particle diameter of powder and enters next process; Underproof pulverized particles is entered to high-pressure roller mill and again carry out high pressure roller mill.
5. high pressure roller mill as claimed in claim 1 is made the method for water-coal-slurry, it is characterized in that, described feed coal particle diameter is R, 0mm < R≤80mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210444208.3A CN103807867A (en) | 2012-11-09 | 2012-11-09 | Method for manufacturing coal water slurry by high-pressure roll milling |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210444208.3A CN103807867A (en) | 2012-11-09 | 2012-11-09 | Method for manufacturing coal water slurry by high-pressure roll milling |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1538110A (en) * | 2003-10-23 | 2004-10-20 | 北京海淀华煤水煤浆技术开发中心 | Press grinding technology for preparing water-coal sturry |
| CN101063058A (en) * | 2006-04-25 | 2007-10-31 | 金贞治 | Apparatus for processing liquid fuel mixed by coal, oil and water, method of processing mixed liquid fuel and mixed liquid fuel thereof |
| US20130061516A1 (en) * | 2010-03-15 | 2013-03-14 | Qinzhou Aurasource Technology Inc. | Preparation method for ultra low ash coal-water slurry |
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2012
- 2012-11-09 CN CN201210444208.3A patent/CN103807867A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1538110A (en) * | 2003-10-23 | 2004-10-20 | 北京海淀华煤水煤浆技术开发中心 | Press grinding technology for preparing water-coal sturry |
| CN101063058A (en) * | 2006-04-25 | 2007-10-31 | 金贞治 | Apparatus for processing liquid fuel mixed by coal, oil and water, method of processing mixed liquid fuel and mixed liquid fuel thereof |
| US20130061516A1 (en) * | 2010-03-15 | 2013-03-14 | Qinzhou Aurasource Technology Inc. | Preparation method for ultra low ash coal-water slurry |
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Application publication date: 20140521 |
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