Abstract
This paper briefly introduces various methods of coal desulfurization (physical desulphurization, chemical desulfurization, biological desulfurization, etc.) and analyzes some problems existing in each method. The principle and research process of friction electrostatic separation technology and high gradient magnetic separation technology in pre-combustion desulfurization technology are emphatically introduced, and the development trend of coal-fired desulfurization technology in the future is prospected.
Highlights
Coal plays a leading role in the primary energy consumption structure
This paper consists of the following parts: after the introduction, in Section 2, the form of sulfur in coal is explained; in Section 3, the desulphurization effect of various desulfurization methods is compared, but only the physical desulfurization method in the pre-combustion desulfurization method is used in industry on a large scale; in Sections 4 and 5, the principles and developments of friction electrostatic separation technology and high gradient magnetic separation (HGMS) technology with broad application prospects are described; in Section 6, the first five sections are summarized, and the future development of coal-fired desulfurization technology is prospected
In Germany, Singewald and Fricke invented a method for improving the electrostatic separation of coal powder to remove pyrite [23], in this method, a fatty acid glycerol ester is used to regulate the treatment of pulverized coal and to control the temperature and humidity in the process of electroseparation, after the pulverized coal is treated by this method, a very good sorting effect can be obtained by multi-stage electric selection
Summary
By 2020, the total coal consumption in China will still account for 58% of the total energy consumption [1], and the environmental loss per ton of coal will be 185.6 yuan [2] in the course of production and use. It is of great significance to remove sulfur from coal effectively for the development of economy, the strengthening of environmental protection, the management of serious acid rain problems and the smooth realization of our country’s sustainable development strategy. This paper consists of the following parts: after the introduction, in Section 2, the form of sulfur in coal is explained; in Section 3, the desulphurization effect of various desulfurization methods is compared, but only the physical desulfurization method in the pre-combustion desulfurization method is used in industry on a large scale; in Sections 4 and 5, the principles and developments of friction electrostatic separation technology and high gradient magnetic separation (HGMS) technology with broad application prospects are described; in Section 6, the first five sections are summarized, and the future development of coal-fired desulfurization technology is prospected
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