水热提质褐煤的转化利用研究进展
第46卷 第11期 热 力 发 电 V ol.46 No.11
收稿日期：2017-03-27
基金项目：国家重点研发计划(2016YFB0600505)
Supported by ：National Key Research and Development Program of China (2016YFB0600505)
第一作者简介：刘建忠(1965—)，男，博士，教授，主要研究方向为煤高效清洁燃烧与转化技术，jzliu@https://www.sodocs.net/doc/8e1891352.html, 。
水热提质褐煤的转化利用研究进展
刘建忠，吴君宏，王智化，岑可法
(浙江大学能源清洁利用国家重点实验室，浙江 杭州 310027)
［摘 要］中国褐煤储量丰富，但高含水率、低热值的特点制约了褐煤的加工转化和利用。水热脱水
提质工艺由于具备脱水耗能低、脱氧、碳化以及表面改性等深度改性的特点而受到关注。
目前，褐煤水热提质研究多偏向于单点的机理研究，而水热提质对于各种煤炭热转化及加
工利用的影响及其产业化应用的前景分析缺乏。本文在阐述褐煤水热提质发展历程的基础
上，重点探讨了水热提质对水煤浆制浆、液化、气化、热解和燃烧等方面的影响机理，并
针对褐煤水热提质工艺和产业化应用存在的问题，提出了推进水热提质煤和水热废水直接
制备高浓度水煤浆工业化应用，积极开展水热褐煤提质及转化利用工艺的技术研发，以及
将褐煤水热提质与水煤浆气化、煤热解多联产系统、提质煤成型等工艺过程进行有机耦合
等建议。
［关 键 词］水热提质；褐煤；成浆性；热解；液化；燃烧；气化
［中图分类号］TQ536 ［文献标识码］A ［文章编号］1002-3364(2017)11-0001-06
［DOI 编 号］10.3969/j.issn.1002-3364.2017.11.001
Research progress of conversion and utilization of upgraded lignite by
hydrothermal dewatering
LIU Jianzhong, WU Junhong, WANG Zhihua, CEN Kefa
(State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China)
Abstract: The reserve of lignite is abundant in China. However, the high moisture content and low calorific value in lignite are the major obstacles to its conversion and utilization. Hydrothermal dewatering (HTD) has attracted intense research attention, owing to its comprehensive modifications, including dehydration, deoxygenation, carbonization, and surface modification. Continuous efforts to investigate HTD are generally directed toward the research of one single topic. However, the mechanism study of HTD on thermal conversion and utilization processes, and the prospect analysis of HTD industrialization are completely lacking. The development history of HTD is briefly introduced. The effects of HTD on the slurryability, liquefaction, gasification, pyrolysis and combustion are investigated in detail. Moreover, several suggestions are proposed based on the current problems in industrialization of HTD technology. It is suggested that the lignite HTD should combine with coal-water slurry gasification, pyrolysis-based integrated multiproduct process and coal briquetting, to achieve large-scale utilization of lignite in the future.
Key words: hydrothermal dewatering, lignite, slurryability, pyrolysis, liquefaction, combustion, gasification
褐煤储量丰富，占全球煤炭总储量的45%，是
全球能源供应的重要来源之一[1]。与高阶煤相比，
褐煤具有开采成本低，反应活性好，煤中硫、氮和
重金属等污染物成分含量低等优势，非常适合作为
热力发电和化工生产的燃料或原料。然而，褐煤的
高含水率是制约其加工转化和利用的最大因素。褐
煤较高的内水含量导致其运输费用增加；褐煤直接燃烧发电时，褐煤水分的蒸发需要消耗大量的气化潜热，降低电厂效率；在制浆时煤中孔隙中大量吸附的内水并不能用来降低体系的黏度，从而影响褐煤的成浆性，一般褐煤的水煤浆浆体质量分数仅为40%左右[2]。因此，对褐煤进行必要的脱水提质处理，改善褐煤品位，有利于实现高碳能源低碳化利用。
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