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System and method for processing low-rank coal

A technology for low-rank coal and clean coal, which is applied in the field of processing low-rank coal systems, can solve the problems of low gangue discharge rate of low-rank coal and reduce energy costs, so as to increase oil and gas yield, reduce energy costs, and achieve drying and The effect of the integration of gangue

Inactive Publication Date: 2016-06-01
SHENWU TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, an object of the present invention is to propose a system and method for processing low-rank coal. This system can solve the problem of low waste-discharging rate of low-rank coal in the existing compound gangue discharge technology, thereby improving the subsequent pyrolysis process. The quality and yield of pyrolysis products in the process, and by recovering the waste heat generated in the pyrolysis process for the waste removal process, energy costs can be significantly reduced

Method used

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  • System and method for processing low-rank coal
  • System and method for processing low-rank coal

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specific Embodiment

[0065] In yet another aspect of the present invention, the present invention provides a method for processing low-rank coal. According to an embodiment of the present invention, the method is carried out by using the above-mentioned system for processing low-rank coal. According to a specific embodiment of the present invention, the method includes: (1) supplying low-rank coal to the hot-air compound gangue discharge device and using hot air to discharge and dry the low-rank coal, so as to obtain gangue, Clean coal and tail gas containing dust; (2) supply the clean coal to the screening device for screening treatment, so as to obtain clean coal on the screen and clean coal under the screen; (3) clean coal under the screen The coal is supplied to the crushing device for crushing so as to obtain pulverized coal; (4) the pulverized coal is supplied to the forming device for forming so as to obtain pellets; (5) the fine powder on the sieve is The coal and the pellets are supplied...

Embodiment

[0091] use Image 6 The system for processing low-rank coal shown in the figure processes raw coal of low-rank coal. The raw coal treatment capacity of this embodiment is 1 million tons per year, and the processing particle size range is full particle size. The base moisture of low-rank coal is 35wt%. Embodiments include the process steps in the following order:

[0092] 1) The low-rank raw coal is first fed into the hot-air composite gangue discharge device from the raw coal bunker through the belt conveyor and the coal feeder. The hot air temperature is 100°C, and enters the hot-air composite gangue discharge device from the bottom. The gangue is separated in the machine, the gangue is discharged from the gangue discharge port of the hot air composite gangue discharge device, the airflow entrained with dust enters the dust removal device from the outlet of the dust removal cover of the hot air composite gangue discharge device, and the clean coal is discharged from the hot a...

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Abstract

The invention discloses a system and method for processing low-rank coal. The system comprises a hot-blast combined waste stone discharge device, a screening device, a crushing device, a forming device, a pyrolysis device and a waste heat recycle device. A clean coal inlet of the screening device is connected with a clean coal outlet of the hot-blast combined waste stone discharge device. An undersize clean coal inlet of the crushing device is connected with an undersize clean coal outlet of the hot-blast combined waste stone discharge device. A powder inlet of the forming device is connected with a powdered coal outlet of the crushing device. A material inlet of the pyrolysis device is connected with an oversize clean coal outlet of the hot-blast combined waste stone discharge device and a coal pellet outlet of the forming device. A carbocoal inlet of the waste heat recycle device is connected with a carbocoal outlet of the pyrolysis device. A hot gas outlet of the waste heat recycle device is connected with a hot blast inlet of the hot-blast combined waste stone discharge device. According to the system, the problem that existing combined waste stone discharge technologies are low in low-rank coal waste stone discharge rate can be solved so that the quality of pyrolysis products in the subsequent pyrolysis process can be improved and the productive rate of the pyrolysis products can be increased, and the energy cost can be remarkably reduced.

Description

technical field [0001] The present invention relates to a system and method for processing low-rank coal. Background technique [0002] my country's coal resources are characterized by rich coal, poor oil, and little gas. The position of coal in my country's energy resources will not change for a long period of time. In coal resources, low-rank coal reserves are abundant. According to the prediction of international geologists, low-rank coal accounts for about 60% of coal resource reserves. It is one of the main energy sources that can be used in the future. It is mainly distributed in Australia, the United States, Russia, and China. , Indonesia, Germany and Eastern European countries, etc. Low-rank coal mainly includes non-caking coal, weakly caking coal, long-flame coal and lignite, etc., which have the characteristics of high moisture, low density, high volatile content, non-caking, strong chemical reactivity, poor thermal stability and low calorific value. [0003] Alt...

Claims

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Application Information

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IPC IPC(8): F26B21/00B07B9/00C10B53/04
CPCB07B9/00C10B53/04F26B21/003Y02P20/129Y02P70/10
Inventor 赵小楠丁力郭启海吴道洪
Owner SHENWU TECH GRP CO LTD
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