摘要
结合制备水煤浆的影响因素综述了水煤浆制备研究现状、作为清洁燃料的应用现状及水煤浆典型气化技术,并结合水煤浆技术存在的问题对水煤浆未来发展方向进行展望。随着中等变质程度煤种资源的紧张和煤价攀升,拓宽水煤浆原料煤种尤为重要,配煤及褐煤改性的方式能够有效改善低阶煤的成浆特性,且水煤浆能够与废弃物协同处理实现废弃物的减量化、无害化、资源化利用,具有经济环保双重效益,符合国家“增效降耗的政策导向”;水煤浆添加剂对浆体性质的影响至关重要,以阴离子型添加剂应用最广,而以利用腐植酸、木质素等生物质资源为原料开发的水煤浆添加剂具有深远意义,开发高效经济的水煤浆添加剂以提高煤浆浓度、降低黏度是水煤浆技术的研究重点;制浆工艺是水煤浆制备技术的核心,合理的制浆工艺能够提高水煤浆质量、降低制浆成本,不同制浆工艺核心点在于不断提高颗粒的堆积效率,通过改善颗粒粒度分布达到煤浆提浓的目的,成为低阶煤提浓的主流技术,新型制浆工艺开发过程中应在拓宽原料煤煤种,不断提高煤浆浓度的同时,考虑制浆过程中的能耗,提浓降耗的新型制浆工艺的开发研究对未来水煤浆技术的发展具有重要意义;水煤浆作为清洁燃料主要应用于电站锅炉、工业锅炉、陶瓷等建材行业,作为气化原料主要应用于煤化工气化技术,如德士古气化技术、多喷嘴对置式气化技术、晋华炉气化技术,未来水煤浆气化必定朝着技术自主化、多元化、装置大型化的方向发展。
In Combination with the influencing factors of coal-water slurry preparation,the research status of coal-water slurry preparation,the application status of coal-water slurry as clean fuel and the typical gasification technology of coal-water slurry were reviewed.Combined with the existing problems of coal-water slurry technology,the future development direction of coal-water slurry was prospected.With the shortage of medium-grade metamorphic coal resources and the rise of coal prices,it is very important to broaden the raw coal types of coal water slurry in the industrialization development of coal water slurry.Coal blending and lignite modification can effectively improve the slurry characteristics of low-rank coal,and coal water slurry can realize the reduction,harmlessness and resource utilization of waste by synergistic treatment with waste,which has dual economic and environmental benefits and is in line with the national policy orientation of“increasing efficiency and reducing consumption”.The influence of coal water slurry additives on the properties of slurry is very important,and anionic additives are widely used.The coal water slurry additives developed by using humic acid,lignin and other biomass resources as raw materials have far-reaching significance.Efficient and economical coal water slurry additives to improve the concentration of coal slurry and reduce viscosity have been the research focus of coal water slurry technology.Slurry preparation process is the core of coal water slurry preparation technology.Reasonable slurry preparation process can improve the quality of coal water slurry and reduce the cost of slurry preparation.The core point of different slurry preparation processes is to continuously improve the accumulation efficiency of particles,and to achieve the purpose of coal slurry concentration by improving the particle size distribution,which has become the mainstream technology of low-rank coal concentration.The development of new slurry preparation process should broaden the raw coal type and continuously improve the concentration of coal slurry.At the same time,considering the energy consumption in the process of slurry preparation,the development and research of new slurry preparation process with increasing concentration and reducing consumption is of great significance to the development of coal water slurry technology in the future.As clean fuel,coal-water slurry is mainly used in power plant boilers,industrial boilers,ceramics and other building materials industries.As raw materials of gasification,coal-water slurry is mainly used in the field of coal chemical industry of gasification technology.Common gasification technologies include Texaco gasification technology,multi-nozzle opposed gasification technology and Jinhua boiler gasification technology.In the future,coal-water slurry gasification will develop in the direction of technology autonomy,diversification and large-scale equipment.
作者
徐彤
何国锋
李磊
XU Tong;HE Guofeng;LI Lei(China Coal Research Institute,Beijing 100013,China;China Coal Technology&Engineering Group Clean Energy Company Limited Department,Beijing 100013,China)
出处
《洁净煤技术》
CAS
北大核心
2021年第6期42-52,共11页
Clean Coal Technology
基金
国家重点研发计划资助项目(2019YFC1905102)
中国煤炭科工集团有限公司科技创新创业资金资助项目(2020-ZD001)。
关键词
水煤浆
提浓
制浆工艺
燃料水煤浆
水煤浆气化技术
coal water slurry
improve slurry concentration
slurry preparation process
fuel coal water slurry
coal water slurry gasification technology
作者简介
徐彤(1996-),男,山东泰安人,硕士研究生,从事水煤浆技术研究。E-mail:fkgkrd@qq.com。
