CN101433878A - Complete washing technique for power coal - Google Patents
Complete washing technique for power coal Download PDFInfo
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- CN101433878A CN101433878A CNA2007101702660A CN200710170266A CN101433878A CN 101433878 A CN101433878 A CN 101433878A CN A2007101702660 A CNA2007101702660 A CN A2007101702660A CN 200710170266 A CN200710170266 A CN 200710170266A CN 101433878 A CN101433878 A CN 101433878A
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- coal
- washing
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- power
- winnowing
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- 239000003245 coal Substances 0.000 title claims abstract description 95
- 238000005406 washing Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000001035 drying Methods 0.000 claims abstract description 10
- 238000013467 fragmentation Methods 0.000 claims description 2
- 238000006062 fragmentation reaction Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000003908 quality control method Methods 0.000 abstract description 3
- 230000036571 hydration Effects 0.000 abstract 1
- 238000006703 hydration reaction Methods 0.000 abstract 1
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 239000002956 ash Substances 0.000 description 16
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 5
- 239000010883 coal ash Substances 0.000 description 5
- 238000012216 screening Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 238000005188 flotation Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000010866 blackwater Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention relates to a processing technology for improving the quality of coal. The technology solves the problems that a full-in washing process of a coal wet method for coal selection substantially increases the production cost of coal and has large water consumption; a dry method for coal selection has low ash removing rate, is unsuitable for washing, selecting and processing coarse coal and is difficult to ensure the whole quality of a coal product; and the invention provides a full-in washing process for power coal. The process comprises the following technical proposal: raw coal is sifted; pulverized coal less than certain granularity enters a winnowing device; after winnowing treatment, the ash content is reduced; lump coal more than certain granularity enters a wet method washing and selecting system; and the ash content is reduced through the washing and selecting of the wet method. If coal after wet selecting or winnowing is subjected to low-temperature low-humidity drying and hydration, moisture in the coal can be effectively reduced. The technology solves the problems that the full-in washing of the power coal has high processing cost and is limited by water resource; in particular, a water shortage region and a production region of the power coal with low calorific value and high moisture content are more suitable for adopting the process technology; and the technology improves the degree of quality control of a power coal product, forms a power coal full-in washing technology with market competitiveness and develops a novel approach for improving and stabilizing the quality of the power coal.
Description
Technical field
The present invention is the coal Upgrading Processes, is mainly used in the ash content and the moisture that reduce coal product, improves the coal product quality.
Background technology
At present, it is jigging washing technology and flotation technology combination, heavily the be situated between combination of eddy flow and flotation technology or jigging washing technology, heavily the be situated between combination of eddy flow and flotation technology that coal goes into to wash washing technology that technology mainly selects for use entirely, be the wet coal preparation method, operating cost height and water consumption are big.Go into to wash entirely if this technology is used for thermal coal, then increase considerably the production cost of thermal coal.And many production areas water resource critical shortage, be not suitable for building the wet coal preparation factory of a large amount of waters.Therefore, current driving force coal coal washery is for reducing cost and reducing water consumption, basic employing will go into to wash greater than the lump coal of a certain particle size range, raw coal goes into to wash only 30-40% of rate, therefore the coal washery is limited to thermal coal quality control degree, when production process runs into structure or tomography, be difficult to guarantee the coal product quality, satisfy user's instructions for use.At present, the dry coal preparation technology develops maturation rapidly, and be applied in certain zone, compare with conventional wet washing technology, dry method washing technology has not water, cost is low and be suitable for characteristics such as discharge refuse, but dry method washing technology ash content removal efficiency is low, and is not suitable for the coarse coal dressing of coal by washing, is difficult to guarantee the coal product total quality.
Because the thermal coal price is lower, be subjected to the restriction of selling price, be difficult to find suitable coal to go into to wash processing upgrading technology entirely, the thermal coal that calorific value is low, water content is high is then more difficult to find the suitable coal washing charcoal dressing of coal by washing upgrading technology of going into entirely.
Summary of the invention
The purpose of this invention is to provide a kind of complete washing technique for power coal.This technology has solved thermal coal and has gone into to wash the processing cost height entirely, is subjected to the problem of water resource restriction, and has strengthened thermal coal quality control ability.
Concrete technical scheme of the present invention is: a kind of complete washing technique for power coal, raw coal is sieved, and the following coal of granularity 100mm enters aidr bells blast system, carries out selection by winnowing; The above lump coal of granularity 13mm enters wet method washing system, washes.
Wherein, before or after selection by winnowing, can carry out low temperature to thermal coal, the low humidity drying removes moisture; Also can after the washing with lump coal directly or after the fragmentation, carry out low temperature, the low humidity drying removes moisture; Taking temperature when dry is 50-200 ℃, and humidity is less than 20% dry-heat air.
Advantage of the present invention and good effect are: under low processing cost, realized that the whole of thermal coal go into to wash, and have improved the ability of regulation and control of dressing of coal by washing system to the thermal coal quality; Go into to wash technology entirely with conventional wet and compare, it is few to have water consumption, and black water is few, the characteristics that the dressing of coal by washing cost is low; Compare with dry method selection by winnowing technology, have washing precision height, characteristics such as ash content removal efficiency height.If with wet method washing technology, selection by winnowing technology and low temperature, low humidity dry technology organic assembling, can not only control ash content of coal content, and can control the coal moisture, the processing that especially is fit to Gao Shui, dirty coal is handled.
The specific embodiment
Embodiment 1
Raw coal is sieved, and the following coal of granularity 100mm enters aidr bells blast system, reduces by making ash content after the selection by winnowing; The above lump coal of granularity 100mm enters wet method washing system, reduces by making ash content after the washing.
Embodiment 2
With a kind of content of ashes is 18%, and moisture is that granularity entered wet method washing system greater than the lump coal of 13mm after the screening of 18% thermal coal was handled, the Ba Dake jigging machine that utilizes Germany to produce, and ash content is reduced to 8% from 18%; Granularity enters the pneumatic separation device that Divine Land, Tangshan Mechanology Inc. produces less than the fine coal of 13mm, and coal ash is reduced to 13%, mixing marketable coal calorific value raising 160kcal/kg from 18%.
Embodiment 3
With a kind of content of ashes be 25%, moisture is that granularity entered wet method washing system greater than the lump coal of 25mm after 30% jet coal screening was handled, the jigging washing appliance that utilizes U.S. Sai Ji Man to produce, ash content is reduced to 16% from 25%; Granularity enters the pneumatic separation device that Divine Land, Tangshan Mechanology Inc. produces less than the fine coal of 25mm, coal ash is reduced to 21% from 25%, fine coal enters low temperature, low humidity drying device then, the dry-heat air inlet temperature is 150 ℃, humidity 5%, moisture is reduced to 24%, mixing marketable coal calorific value raising 420kcal/kg from 30%.
Embodiment 4
With a kind of content of ashes 28%, moisture is that granularity entered wet method washing system greater than the lump coal of 20mm after the screening of 35% brown coal was handled, the shallow slot that utilizes U.S. Sai Ji Man the to produce washing appliance that heavily is situated between, and ash content is reduced to 20% from 28%; Granularity enters low temperature, the low humidity drying device that Divine Land, Tangshan Mechanology Inc. produces less than the fine coal of 20mm, the dry-heat air inlet temperature is 180 ℃, humidity 8% moisture is reduced to 22% from 30%, fine coal enters pneumatic separation device then, coal ash is reduced to 23%, mixing marketable coal calorific value raising 520kcal/kg from 28%.
Embodiment 5
With a kind of content of ashes 20%, moisture is that granularity entered wet method washing system greater than the lump coal of 20mm after the screening of 22% weakly caking coal was handled, the shallow slot that utilizes U.S. Sai Ji Man the to produce washing appliance that heavily is situated between, and ash content is reduced to 14% from 20%; Granularity enters low temperature, the low humidity drying device that Divine Land, Tangshan Mechanology Inc. produces less than the fine coal of 20mm, the dry-heat air inlet temperature is 160 ℃, humidity 10%, moisture is reduced to 16% from 22%, fine coal enters pneumatic separation device then, coal ash is reduced to 15%, mixing marketable coal calorific value raising 440kcal/kg from 20%.
Embodiment 6
With a kind of content of ashes 22%, moisture is that granularity entered wet method washing system greater than the lump coal of 50mm after the screening of 28% thermal coal was handled, the shallow slot that utilizes U.S. Sai Ji Man the to produce washing appliance that heavily is situated between, and ash content is reduced to 15% from 22%; Granularity enters low temperature, the low humidity drying device that Divine Land, Tangshan Mechanology Inc. produces less than the fine coal of 50mm, the dry-heat air inlet temperature is 200 ℃, humidity 12%, moisture is reduced to 19% from 28%, fine coal enters pneumatic separation device then, coal ash is reduced to 17%, mixing marketable coal calorific value raising 420kcal/kg from 22%.
Claims (4)
1, a kind of complete washing technique for power coal is characterized in that: raw coal is sieved, and the following coal of granularity 100mm enters aidr bells blast system, carries out selection by winnowing; The above lump coal of granularity 13mm enters wet method washing system, washes.
2, a kind of complete washing technique for power coal as claimed in claim 1 is characterized in that: before or after selection by winnowing to coal carry out low temperature, the low humidity drying removes moisture.
3, a kind of complete washing technique for power coal as claimed in claim 1 is characterized in that: after the washing with lump coal directly or after the fragmentation, carry out low temperature, the low humidity drying removes moisture.
4, as claim 2,3 described a kind of complete washing technique for power coal, it is characterized in that: taking temperature when drying is 50-200 ℃, and humidity is less than 20% dry-heat air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101702660A CN101433878A (en) | 2007-11-15 | 2007-11-15 | Complete washing technique for power coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101702660A CN101433878A (en) | 2007-11-15 | 2007-11-15 | Complete washing technique for power coal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101433878A true CN101433878A (en) | 2009-05-20 |
Family
ID=40708606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101702660A Pending CN101433878A (en) | 2007-11-15 | 2007-11-15 | Complete washing technique for power coal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101433878A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102179291A (en) * | 2010-12-31 | 2011-09-14 | 中国神华能源股份有限公司 | Steam coal preparation technique with low coal slime yield |
| CN105327770A (en) * | 2015-11-23 | 2016-02-17 | 淮南矿业(集团)有限责任公司 | Coal dressing treatment method |
| CN109772571A (en) * | 2019-01-24 | 2019-05-21 | 中国矿业大学 | A kind of lump coal enters the coal jigging technique washed |
-
2007
- 2007-11-15 CN CNA2007101702660A patent/CN101433878A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102179291A (en) * | 2010-12-31 | 2011-09-14 | 中国神华能源股份有限公司 | Steam coal preparation technique with low coal slime yield |
| CN105327770A (en) * | 2015-11-23 | 2016-02-17 | 淮南矿业(集团)有限责任公司 | Coal dressing treatment method |
| CN109772571A (en) * | 2019-01-24 | 2019-05-21 | 中国矿业大学 | A kind of lump coal enters the coal jigging technique washed |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice |
Addressee: Di Chuangeng Document name: Notification of before Expiration of Request of Examination as to Substance |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090520 |