Microwave drying and upgrading method of lignite or coal slime

A microwave drying and coal slime technology, applied in the drying of peat, the processing of peat, the petroleum industry, etc., can solve the problems of high drying cost, difficult drying of internal water, uneven heating, etc. Easy to transport and sell, uniform moisture content

Active Publication Date: 2011-06-22
JINYITONG SCI ANDTECH BEIJING CO LTD
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Problems solved by technology

[0002] At present, the commonly used drying and upgrading equipment for lignite and coal slime at home and abroad mainly include drying furnace or drum dryer. Many years of production practice have found that this technology has the following problems: ① The moisture content of the powder and lumps in the dried product is not uniform, The powder is over-dried, but the lumps are not dry enough; ②The lump coal is smashed during the drying process, and the product is over-crushed; ③The drying amount is small, and it is difficult to control the temper

Method used

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Examples

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Embodiment Construction

[0037] The microwave drying and upgrading method of lignite or coal slime of the present invention is further described below in conjunction with some examples:

[0038] The microwave drying and upgrading method of lignite or coal slime of the present invention includes the existing microwave drying method of coal, wherein the coal is preheated and thermally dehydrated before drying, and the preheating technology and the thermal dehydration technology are existing There is a technology, after drying, the waste heat produced on the coal in the drying process is used to carry out hot-press molding of coal, and the hot-press molding technology is a prior art, and the method comprises the following steps:

[0039] a. Prepare the preheating, thermal dehydration, microwave drying and thermoforming devices and start them;

[0040] b. Add coal to be processed into the preheating device;

[0041] c. Coal is preheated in the preheating device;

[0042] d. Send the preheated coal into ...

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Abstract

The invention discloses a microwave drying and upgrading method of lignite or coal slime. The method is characterized in that coal is preheated and performs thermal dehydration treatment before drying and the waste heat generated by coal in the drying process is utilized to perform the hot press moulding of coal. By adopting the method of the invention to perform the drying and upgrading of lignite or coal slime, the effects of reducing the energy consumption and increasing the quality and the cost of microwave drying can be further reduced; and the method is a brand-new drying and upgrading method of lignite or coal slime.

Description

Technical field [0001] The invention relates to a coal drying method, in particular to a microwave drying and upgrading method for lignite or coal slime. Background technique [0002] At present, the commonly used drying and upgrading equipment for lignite and coal slime at home and abroad mainly include drying furnace or drum dryer. Many years of production practice have found that this technology has the following problems: ① The moisture content of the powder and lumps in the dried product is not uniform, The powder is over-dried, but the lumps are not dried enough; ②The lump coal is smashed during the drying process, and the product is excessively crushed; ③The drying amount is small, and it is difficult to control the temperature; The temperature of the surface is higher than that of the inner surface, and the heating is uneven; ⑥ It is not easy to dry the inner water. These problems make the application of this technology greatly restricted. In recent years, microwav...

Claims

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Application Information

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IPC IPC(8): C10L5/14C10L5/04C10F5/00C10F7/06
Inventor 唐中亚常建勇游志文
Owner JINYITONG SCI ANDTECH BEIJING CO LTD
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