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Closed circulating heat supply device for lignite drying and upgrading and heat supply method

A closed cycle, heating device technology, applied in the direction of heating devices, drying, dryers, etc., to reduce useless fly ash content, avoid impact wear, and improve combustion efficiency

Inactive Publication Date: 2013-02-13
ZHEJIANG UNIVERSITY OF MEDIA AND COMMUNICATIONS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the shortcomings of the flue gas heating technology in the existing lignite upgrading process, the present invention provides a high-efficiency closed cycle heating device and process method with good heating effect, energy saving, environmental protection, and stable performance

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  • Closed circulating heat supply device for lignite drying and upgrading and heat supply method
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  • Closed circulating heat supply device for lignite drying and upgrading and heat supply method

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0021] figure 1 , 2 Schematic diagram of the structure and process flow of the closed cycle heating device for drying and upgrading lignite. The device includes a hot blast stove 1, a drying device 2, a cyclone dust collector 3, a stirring 4, a feeder 5, an airtight pulverized coal conveying pipeline 6, a blower 7, a feeding nozzle 8, a dust baffle 9 and a soot cleaning port 10.

[0022] The hot blast stove 1 is connected with the drying device 2; the right side of the drying device 2 is equipped with a cyclone dust collector 3; the lower end of the cyclone dust collector 3 is connected with a st...

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Abstract

The invention discloses a closed circulating heat supply device for lignite drying and upgrading and a heat supply method. A hot blast furnace is connected with a drying device to provide a heat source of the initial stage for the in-furnace combustion of the lignite; under the action of a main induced draft fan, hot smoke enters the drying device to realize the drying and dehydration of raw coal; the hot smoke and lignite pyrolytic gas guided out by the drying device are sent into a cyclone dust extractor; after cyclone dust extraction, a part of the lignite dust in the smoke subsides downwards to enter a stirring cage and then is sent to a closed pulverized coal conveying pipeline through a feeder; and under the action of an air blower, the lignite dust and the pyrolytic gas are evenly and dispersedly blown into the hot blast furnace for sufficient combustion through a nozzle through the conveying pipeline in a spiral manner. The closed circulating heat supply device is reasonable in design, safe, reliable and stable in running during large-scale application, and has the effects of realizing the recycle of the lignite dust and the pyrolytic gas, effectively overcoming the problem that the traditional smoke heat supply and upgrading process is high in energy consumption, high in pollution and the like and meeting the environmental requirements of saving energy and reducing emission.

Description

technical field [0001] The invention relates to a cycle heat supply process in the lignite upgrading process, and belongs to the technical field of clean and efficient utilization of coal. Background technique [0002] Lignite reserves account for about 15% of my country's total coal reserves. It is one of the main coal resources and plays an important role in my country's power and chemical coal. Lignite is a kind of coal with short underground storage period and low degree of coalification. It has high moisture and ash content and is easy to weather in the air. When it is directly used as a direct fuel, its combustion efficiency is low, and it has high greenhouse gas emissions and serious pollution. Lignite is mainly distributed in Inner Mongolia, Heilongjiang, Yunnan, Xinjiang and other places. Due to economic development, the coal consumption in these areas is less than that in economically developed areas, so lignite needs to be transported to distant utilization sites....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B23/02
Inventor 李虎雄李闻白仁亮程成邱波
Owner ZHEJIANG UNIVERSITY OF MEDIA AND COMMUNICATIONS
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