CN102899108A - Technology for preparing coal water slurry from coal dust - Google Patents
Technology for preparing coal water slurry from coal dust Download PDFInfo
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- CN102899108A CN102899108A CN 201110211066 CN201110211066A CN102899108A CN 102899108 A CN102899108 A CN 102899108A CN 201110211066 CN201110211066 CN 201110211066 CN 201110211066 A CN201110211066 A CN 201110211066A CN 102899108 A CN102899108 A CN 102899108A
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Abstract
The invention relates to a technology for preparing a coal water slurry from coal dust. The technology comprises a step of producing a semi-finished product in the position of raw coal and a step of producing a finished product which is the coal water slurry in the position of a user. The technological parameters in the technology for preparing the coal water slurry from the coal dust comprise a coarse grain grinding time of 48-63min and a ratio of coarse grains to fine grains of 1.0-1:7.0:1.
Description
Technical field:
The present invention relates to a kind of technique of pulverized coal preparation coal water slurry, this technique first raw coal produce work in-process after again the user the coal water slurry that manufactures a finished product.
Background technology:
Coal water slurry is a kind of coal based fluid fuel that the seventies, oil grew up in critical.The mixture that it is comprised of 70% coal dust, 30% water and a small amount of chemical additive, the approximately common Coal Water Slurry 1t of 2t or 2.5t heavy oil.Because coal water slurry has good flowability and stable, can as oil, realize hermetically sealed accumulating and high efficiency spray burning.
At present, the pulping process of China's coal water mixture plant except pulp mill, Beijing and Yan day pulp mill, almost all adopts wet ball-milling pulping process processed.Its weak point is: 1. freight charges are high.Because the coal water slurry product approximately has 30% moisture on the one hand, hauled weight increases; Must adopt on the other hand special-purpose tank car transportation, and generally be unidirectional transportation (what return is empty wagons); 2. the additive expense increases.Because the finished product coal water slurry is generally wanted long-distance transportation, add in pulp mill and end user location and all will adopt storage tank to store for a long time, thus very high to the stability requirement of coal water slurry, therefore must add stablizer; 3. in coal water slurry storage tank, generally all stirring mechanism to be set, avoid precipitating; 4. at severe winter, coal water slurry storage tank will arrange antifreeze facility, avoids storage tank and ducted coal water slurry to freeze; 5. the finished product coal water slurry is easy to contact with air for poorly sealed in storage and transport process, causes the dried cake phenomenon of coal water slurry, blocking filtering device even obstruction spray gun.
Summary of the invention:
The present invention be directed to the problems referred to above, a kind of technique of pulverized coal preparation coal water slurry is provided.
For realizing above-mentioned purpose of the present invention, processing step of the present invention is: raw coal is broken, and dry grinding adds the fine grinding of water high density, adds dispersion agent, stirs into work in-process, adds water and stirs into the coal water slurry product.
Processing parameter of the present invention is: coarse particles grinds time 48～63min, thickness grating ratio: 1.0: 1～7.0: 1.
Beneficial effect of the present invention:
1. the present invention adopts and does the wet method combination, the particle that two groups of different grain sizes distribute can be carried out good grating on the one hand, on the other hand can be so that contain certain moisture in the coal water slurry work in-process, and the harm such as airborne dust in the time of can avoiding two groups of particles all to be dry pulverized coal;
2. the present invention will prepare work in-process and the pulping process is separately finished in two places, break these two processes disposable outmoded conventions of finishing that must be in the same localities;
3. transportation cost of the present invention descends greatly, so that the cost that finally uses of coal water slurry descends greatly, the transporting semi-finished of this process using (dry state powder) has saved the transportation of quite a few moisture (approximately 10%～20%), only need a small amount of moisture of transportation, distance is far away, and is more obvious with respect to the price advantage of transportation finished product coal water slurry;
4. convenient transportation of the present invention, suitable remote (beyond 1000 kilometers), for a long time transportation.Easy to loading and unloading, pollution-free;
5. scale of the present invention is flexible, and the user can be according to the size of make out the scale whipping device of oneself;
6. the present invention is simple and quick, can break away from coal water slurry and be difficult to the long-time problem that stores.
Embodiment:
The present invention first raw coal produce work in-process after again the user the coal water slurry that manufactures a finished product;
Processing parameter of the present invention is: coarse particles grinds time 48～63min, thickness grating ratio: 1.0: 1～7.0: 1;
The coal water slurry performance that the fine particle of the different coarse particles products of table 1 and respective concentration makes in the different gradation ratio
As a kind of preferred version, processing parameter is: coarse particles grinds time 58min, thickness grating ratio: 2.0: 1, slurrying concentration was 73.34%.
Claims (3)
1. the technique of a pulverized coal preparation coal water slurry, it is characterized in that first raw coal produce work in-process after again the user the coal water slurry that manufactures a finished product.
2. the technique of a kind of pulverized coal preparation coal water slurry according to claim 1, it is characterized in that processing parameter of the present invention is: coarse particles grinds time 48～63min, thickness grating ratio: 1.0: 1～7.0: 1.
3. the technique of a kind of pulverized coal preparation coal water slurry according to claim 2, it is characterized in that processing parameter is: coarse particles grinds time 58min, thickness grating ratio: 2.0: 1, slurrying concentration was 73.34%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110211066 CN102899108A (en) | 2011-07-27 | 2011-07-27 | Technology for preparing coal water slurry from coal dust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110211066 CN102899108A (en) | 2011-07-27 | 2011-07-27 | Technology for preparing coal water slurry from coal dust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102899108A true CN102899108A (en) | 2013-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110211066 Pending CN102899108A (en) | 2011-07-27 | 2011-07-27 | Technology for preparing coal water slurry from coal dust |
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| CN (1) | CN102899108A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105018161A (en) * | 2015-07-06 | 2015-11-04 | 天津师范大学 | Slurry fuel prepared by baking biomass and application thereof |
-
2011
- 2011-07-27 CN CN 201110211066 patent/CN102899108A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105018161A (en) * | 2015-07-06 | 2015-11-04 | 天津师范大学 | Slurry fuel prepared by baking biomass and application thereof |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhang Yuzhou Document name: Notification that Application Deemed to be Withdrawn |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130130 |