Present research situation and prospect of magnesium desulfurization in coal-fired power plant

doi:10.16085/j.issn.1000-6613.2017-2563

Abstract

Abstract: Nowadays, coal-fired power generation is applied widely in most countries, and the SO₂ control is important. In this paper, several magnesium methods which have been applied were introduced, and their drawbacks were analyzed. The development direction of magnesium methods were put forward. The dry/semi-dry methods will be used widely in the coal-fired power plants for a generation or more, which might be hindered by the low desulfurization efficiency. According to this, the modified adsorbent is one of fundamental methods. Meanwhile, byproduct reuse can be achieved for the lower cost. The pollution control is aimed at the single pollutant. However, with the severer environmental protection requirement, more and more equipment will be used, which is complicated. So, integrative flue-gas pollutants removal technology will be developed, which based on the dry methods. This paper provides a reference for magnesium desulfurization.

Key words: wet magnesium desulfurization, dry magnesium desulfurization, MgO regeneration, SO₂ reuse, adsorbent modification

摘要： 目前，火力发电是许多国家主要的发电方式，控制SO₂排放是治理烟气中污染物的重要工作。本文介绍了目前电厂有应用业绩的几种镁法脱硫技术，并指出现有镁法脱硫方法的弊端，继而提出未来镁法脱硫的发展方向，即基于氧化镁脱硫剂的干法以及半干法脱硫可能会在未来电厂脱硫中得到较大规模的应用。文章指出脱硫效率低是阻碍干法发展的一大问题，而对脱硫剂改性则是提高干法脱硫效率的根本办法之一，将副产品资源化是降低脱硫成本，弥补吸附剂改性费用的有效方法。针对目前日趋严峻的环保要求，现有电厂污染物治理方法针对性过强，未来，实现多烟气一体化脱除是烟气污染物治理的发展方向，干法脱硫可以为多污染物一体化脱除打下基础。本文旨在为推动氧化镁法脱硫提供参考。

关键词: 湿式镁法脱硫, 干式镁法脱硫, MgO循环再生, SO₂资源化, 吸附剂改性

CLC Number:

X701.3

MA Shuangchen, BIE Xuan, SUN Yao, CHEN Kuixu, ZHU Zhaoping. Present research situation and prospect of magnesium desulfurization in coal-fired power plant[J]. Chemical Industry and Engineering Progress, 2018, 37(09): 3609-3617.

马双忱, 别璇, 孙尧, 陈奎续, 朱召平. 燃煤电厂镁法脱除烟气中SO₂的研究现状与展望[J]. 化工进展, 2018, 37(09): 3609-3617.

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