褐煤低温干馏及产物的利用

Lignite low-temperature pyrolysis and utilization of its products

介绍了褐煤的性质及褐煤提质的常规方法。重点介绍了国内外褐煤低温干馏的典型工艺、特点及开发应用现状。分析了干馏工艺中不同的加热方式、热载体类型以及干馏条件对干馏过程和产品的影响。阐述了褐煤低温干馏产品-褐煤半焦、低温煤焦油以及焦炉煤气的综合利用途径。基于目前国内外褐煤低温干馏工艺大多数处于试验或示范性装置运营阶段,未实现大规模运行,指出未来褐煤低温干馏工艺应走大型化、多联产的新型工业化道路,进一步拓宽干馏产品的应用领域,提高其附加值和利用率,才能实现褐煤资源综合效益最大化和可持续发展。

Introduce the nature of lignite and the conventional ways of lignite upgrading. Detail the typical processes, characteristics, development and utilization states of lignite low-temperature pyrolysis at home and abroad. Investigate the influence of heating methods, heat carrier types and reaction conditions on the process and products. Introduce the utilization of pyrolysis products, lignite char, low-temperature coal tar and coke oven gas. Most of lignite low- temperature pyrolysis projects are still experimental, that means there are no large-scale operation experience. To maximize lignite utilization benefits and realize sustainable development, the lignite low-temperature pyrolysis should follow a large-scale and industrial road, further expand the application fields of its products, improve its additional value and utilization rate.