烟煤热解全流程脱硫技术应用及研究进展

为实现烟煤热解提质增效,从脱硫角度,调研了各工段脱硫技术的应用及研究现状,试图厘清烟煤热解全流程脱硫的思路。烟煤热解全流程脱硫包括炉前煤炭脱硫、炉中热解脱硫和炉后煤气脱硫3部分。炉前煤炭脱硫方面,重介质洗选和浮选工业应用成熟,电选、磁选、微生物及各类化学脱硫方法仍处于研究阶段;热解脱硫方面,不同气氛下热解脱硫和与添加剂共热解脱硫均处于实验室研究阶段;炉后煤气脱硫以湿法氧化法应用最为广泛。为实现全流程有效脱硫,现阶段应重点加强以下几方面工作:(1)加大炉前脱硫技术的应用范围和研究力度;(2)加强针对有机硫脱除技术的研发;(3)研发配套环保技术,减少过程污染。

Research and application of desulfurization technology in bituminous coal pyrolysis

In order to improve the quality and efficiency of pyrolysis production,from the viewpoint of desulfurization,the application and research status of desulfurization technology in various sections were reviewed for sorting out the whole process desulfurization of pyrolysis.The whole process of desulfurization of pyrolysis includes three parts:coal desulfurization,pyrolysis desulfurization and gas desulfurization.Some coal desulfurization technologies,such as heavy medium washing and flotation have been commercialized application;while others such as electric separation,magnetic separation,microbial and chemical desulfurization methods are still under development;Pyrolysis desulfurization technologies,including those in different atmospheres and those with different additives,are in the research stage;in contrast,wet oxidation methods are the most widely used gas desulfurization technology.In order to achieve the effective desulfurization of the whole process,the following aspects should be further strengthened,① increasing the application scope and research of pre-coking desulfurization technology;② strengthening the research and development of organic sulfur removal technology;③ researching and developing the environment friendly technologies to reduce process pollution.