CN101638599A - Dry production method of low-dust low-sulfur coal powder - Google Patents
Dry production method of low-dust low-sulfur coal powder Download PDFInfo
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- CN101638599A CN101638599A CN200910183788A CN200910183788A CN101638599A CN 101638599 A CN101638599 A CN 101638599A CN 200910183788 A CN200910183788 A CN 200910183788A CN 200910183788 A CN200910183788 A CN 200910183788A CN 101638599 A CN101638599 A CN 101638599A
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Abstract
The invention relates to a production method of low-dust low-sulfur coal powder, in particular to a dry production method of low-dust low-sulfur coal powder, which belongs to the technical field of coal processing and comprises the following steps: pulverizing raw material coal (raw coal or washed coal) to the granularity range of 0-200 micrometers by a coal pulverizer and synchronously drying thecoal in the process of fine pulverization; feeding the pulverized and dried coal powder into a frictional electrical separator by an air flow conveyor or feeder; separating the coal powder by the frictional electrical separator to remove dust minerals and inorganic sulfur; and collecting the materials separated by the frictional electrical separator through a dust remover so as to obtain the low-dust low-sulfur coal powder with high heating value. The dry production method has the advantages of simple technique and low cost. The product does not need to be dehydrated or dried, or need coal-slurry water treatment system with high investment and cost. The low-dust low-sulfur coal powder can be used for preparing high-grade active carbon and other carbon materials, can be combusted in glassand ceramic furnaces and various coal powder boilers, and can be used for preparing high-quality fine coal water slurry. The dry production method has the advantages of high heat productivity, low pollution and convenient transportation.
Description
Technical field
The present invention relates to a kind of production method of low-dust low-sulfur coal powder, especially relate to a kind of dry method production process of low-dust low-sulfur coal powder, belong to the coal processing technique field.
Background technology
At present at coal industry, exist problems such as energy consumption is big, seriously polluted for the comprehensive utilization of coal all the time.Low-dust low-sulfur coal powder can be used for preparing top-grade active carbon and other carbon materials, for glass, ceramic stove and various coal powder boiler combustion, also can be used for preparing the high-quality Coal Slurry, has the thermal value height, pollutes advantage such as little, convenient transportation.But the method for traditional mode of production low-dust low-sulfur coal powder mainly is wet production (as dense medium separation, flotation, flotation column choosing, selective flocculation, chemistry choosing etc.), its complex manufacturing, product needed dehydrate, need huge slurry circulating system, the production cost height, and waste many precious water resource and cause environmental pollution.
Summary of the invention
The objective of the invention is for overcoming above-mentioned the deficiencies in the prior art part, a kind of dry method production process of low-dust low-sulfur coal powder is provided, feed coal (raw coal or clean fine coal) is used coal pulverizer to be milled down in the size range of 0-200 μ m, can in levigate process, carry out drying synchronously, device or the feeding machine of levigate and exsiccant coal dust being used gas delivery feed in the triboelectric separator, use triboelectric separator and carry out sorting, remove into grey mineral substance and inorganic sulfur, material by after the sorting of fly-ash separator collection triboelectric separator obtains low grey low-sulfur high heating value coal dust.
The present invention realizes with following technical scheme: a kind of dry method production process of low-dust low-sulfur coal powder, it is characterized in that: feed coal is used in the size range that coal pulverizer is milled down to 0-200 μ m, can in the levigate process of feed coal, carry out drying synchronously, levigate and exsiccant coal dust is used pneumatic conveyer or feeding machine feeds in the triboelectric separator, use triboelectric separator and carry out sorting, remove into grey mineral substance and inorganic sulfur, material by after the sorting of fly-ash separator collection triboelectric separator obtains low grey low-sulfur high heating value coal dust.
Described feed coal is raw coal or clean fine coal, uses coal pulverizer and is milled down in the size range of 0-200 μ m, can carry out drying in the levigate process of feed coal synchronously.
Described levigate and exsiccant coal dust is used pneumatic conveyer or feeding machine feeds in the triboelectric separator, use triboelectric separator and carry out sorting, remove into grey mineral substance and inorganic sulfur, by the material after the sorting of fly-ash separator collection triboelectric separator, it is selected cleaned coal behind one section friction electrical selection can also to be carried out two sections, three sections friction electrical selections, also the tail coal behind one section friction electrical selection can be carried out two sections, three sections friction electrical selections and scan.
Advantage of the present invention is: this dry method production process technology is simple, cost is low, product does not need to dehydrate, do not need to invest the high slurry circulating system of big running cost.Low-dust low-sulfur coal powder can be used for preparing top-grade active carbon and other carbon materials, and glass, ceramic stove and various coal powder boiler combustion also can be used for preparing the high-quality Coal Slurry, and the thermal value height, pollutes little, convenient transportation.
Embodiment
Below in conjunction with embodiment the present invention is described in further detail:
Embodiment 1,
The feed coal ash content is 5%, the dry air state, and it is levigate to＜100 μ m to use coal pulverizer; The device of using gas delivery feeds the levigated coal dust in the triboelectric separator, use triboelectric separator and carry out sorting, remove into grey mineral substance and inorganic sulfur, collect material after the triboelectric separator sorting, obtain ash content and be 2.2% low grey low-sulfur high heating value coal dust by fly-ash separator.
Embodiment 2,
The feed coal ash content is 3.8%, and it is levigate to＜74 μ m to use coal pulverizer, feeds hot blast and carry out drying in coal-grinding; The device that levigate and exsiccant coal dust is used gas delivery feeds in the triboelectric separator, use triboelectric separator and carry out sorting, remove into grey mineral substance and inorganic sulfur, collect material after the triboelectric separator sorting, obtain ash content and be 2.36% low grey low-sulfur high heating value coal dust by fly-ash separator.It is selected that ash content behind one section friction electrical selection is that 2.36% cleaned coal carries out two sections friction electrical selections, obtain ash content and be 1.76% low ash extract coal coal dust, it is selected that two sections selected resultant ash contents are that 1.76% low ash extract coal carries out three sections friction electrical selections, obtains ash content and be 0.68% ultralow grey cleaned coal.
Embodiment 3,
The feed coal ash content is 2.3%, and is dry.According to feed coal mineral disseminated grain size, it is levigate to＜38 μ m that feed coal is directly used coal pulverizer, so that mineral substance fully dissociates, the device of using gas delivery feeds in the triboelectric separator, use triboelectric separator and carry out sorting, remove into grey mineral substance and inorganic sulfur, collect material after the triboelectric separator sorting, obtain ash content and be 1.4% low grey low-sulfur high heating value coal dust by fly-ash separator; It is selected that ash content behind one section friction electrical selection is that 1.4% cleaned coal carries out two sections friction electrical selections, obtain ash content and be 0.75% ultralow grey cleaned coal, be that 5.2% tail coal carries out two sections friction electrical selections and scans simultaneously with ash content behind one section friction electrical selection, obtain ash content and be 2.6% cleaned coal, this part cleaned coal is turned back to one section triboelectric separator feed, improved the rate of recovery of whole low ash extract coal.
Claims (3)
1, a kind of dry method production process of low-dust low-sulfur coal powder, it is characterized in that: feed coal is used in the size range that coal pulverizer is milled down to 0-200 μ m, can in the levigate process of feed coal, carry out drying synchronously, levigate and exsiccant coal dust is used pneumatic conveyer or feeding machine feeds in the triboelectric separator, use triboelectric separator and carry out sorting, remove into grey mineral substance and inorganic sulfur, the material by after the sorting of fly-ash separator collection triboelectric separator obtains low grey low-sulfur high heating value coal dust.
2, the dry method production process of a kind of low-dust low-sulfur coal powder according to claim 1, it is characterized in that: described feed coal is raw coal or clean fine coal, use coal pulverizer and be milled down in the size range of 0-200 μ m, can in the levigate process of feed coal, carry out drying synchronously.
3, the dry method production process of a kind of low-dust low-sulfur coal powder according to claim 1, it is characterized in that: described levigate and exsiccant coal dust is used pneumatic conveyer or feeding machine feeds in the triboelectric separator, use triboelectric separator and carry out sorting, remove into grey mineral substance and inorganic sulfur, by the material after the sorting of fly-ash separator collection triboelectric separator, it is selected cleaned coal behind one section friction electrical selection can also to be carried out two sections, three sections friction electrical selections, also the tail coal behind one section friction electrical selection can be carried out two sections, three sections friction electrical selections and scan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN200910183788A CN101638599A (en) | 2009-08-11 | 2009-08-11 | Dry production method of low-dust low-sulfur coal powder |
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| CN200910183788A CN101638599A (en) | 2009-08-11 | 2009-08-11 | Dry production method of low-dust low-sulfur coal powder |
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| CN101638599A true CN101638599A (en) | 2010-02-03 |
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| CN200910183788A Pending CN101638599A (en) | 2009-08-11 | 2009-08-11 | Dry production method of low-dust low-sulfur coal powder |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103084271A (en) * | 2013-01-23 | 2013-05-08 | 浙江大学 | Method for regulating and controlling coal quality in coal gasification process |
| CN104984825A (en) * | 2015-07-20 | 2015-10-21 | 中国矿业大学 | Friction electric separation method and device for micro-fine particle damp materials |
| CN107267236A (en) * | 2017-06-27 | 2017-10-20 | 深圳瑞科天启科技有限公司 | The technique and the coal gasifying process using the technique of a kind of utilization coal or gangue production high heating value water-coal-slurry |
| CN107470012A (en) * | 2017-07-05 | 2017-12-15 | 昆明理工大学 | A kind of extracting method of apatite minal |
| CN114160306A (en) * | 2021-11-18 | 2022-03-11 | 万华化学（宁波）有限公司 | Preparation method of polar high-molecular type coal water slurry additive and residual carbon separation method |
-
2009
- 2009-08-11 CN CN200910183788A patent/CN101638599A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103084271A (en) * | 2013-01-23 | 2013-05-08 | 浙江大学 | Method for regulating and controlling coal quality in coal gasification process |
| CN103084271B (en) * | 2013-01-23 | 2016-01-06 | 浙江大学 | A kind of regulate and control the method for ature of coal in coal gasifying process |
| CN104984825A (en) * | 2015-07-20 | 2015-10-21 | 中国矿业大学 | Friction electric separation method and device for micro-fine particle damp materials |
| CN107267236A (en) * | 2017-06-27 | 2017-10-20 | 深圳瑞科天启科技有限公司 | The technique and the coal gasifying process using the technique of a kind of utilization coal or gangue production high heating value water-coal-slurry |
| CN107470012A (en) * | 2017-07-05 | 2017-12-15 | 昆明理工大学 | A kind of extracting method of apatite minal |
| CN107470012B (en) * | 2017-07-05 | 2020-04-07 | 昆明理工大学 | Method for extracting apatite pure mineral |
| CN114160306A (en) * | 2021-11-18 | 2022-03-11 | 万华化学（宁波）有限公司 | Preparation method of polar high-molecular type coal water slurry additive and residual carbon separation method |
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Application publication date: 20100203 |