文献类型：期刊文献

中文题名：粉煤气化工业装置煤粉黏附力表征及其流动性评价

英文题名：Cohesive Force Determination and Flowability Evaluation of Pulverized Coal in Industrial Gasification Unit

作者：丁家海[1];陆海峰[2]

机构：[1]中国石化扬子石油化工有限公司化工厂,南京210048;[2]华东理工大学上海市煤气化工程技术研究中心,中国石化-华东理工大学煤气化技术研究中心,上海200237

年份：2017

卷号：43

期号：2

起止页码：171

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD_E2017_2018】；

基金：中国石化集团科技项目(SE煤气化示范装置系统优化(415022))

语种：中文

中文关键词：煤粉;流动性;煤气化;黏附力

外文关键词：pu lv erized c o a l; f low a b i l i ty; coal g a s if ic a t io n; cohesive force

摘要：气流床粉煤加压气化工艺中,煤粉颗粒粒径小、比表面积大,受颗粒间黏附力影响,煤粉在锁斗下料单元经常出现结拱架桥现象。本文以SE(Sinopec-ECUST)-东方炉气流床粉煤加压气化工艺为工业应用背景,以典型粒径特征的煤粉样品为研究对象,采用连续介质模型与颗粒间作用力分析相结合的方法,建模求解煤粉颗粒间的黏附力。通过对比不同样品的流动参数、颗粒间作用力及其与重力的相互关系,揭示了平均粒径及细颗粒含量对煤粉流动性和下料过程的影响,并在实验室可视化下料平台和工业装置下料单元对上述结果进行了验证。研究结果表明,随着平均粒径降低、细颗粒含量增加,煤粉流动性减弱,下料逐渐从结拱架桥过渡至无拱自由流。本文为改善入炉煤粉流动性、提高煤粉供料系统运行稳定性提供了有效的参考。
In th e p ro ces s of p re s su r iz e d en tra in e d - f low pu lv erized coal g a s if ic a t io n , pu lv erized coals o ften form arching-br idge phenomenon in the lock hopper feeding unit due to the small par t icle s ize, the large specific surface area,and the resul t ing cohesive force among par t icles . In this paper,by using the indust r ial demonst rat ion uni t of SE （Sinopec-ECUST） -Gasif ier pulverized coal gasif ication as the background, pulverized coal samples wi th dif ferent par t icle sizes as the research mater ials, and a combinat ion of a continuum medium approach and a model of par t icle-par t icle interact ion as the analytical method, a model to predict the cohesive force was buil t . By compar ing the flow propert ies, the interpar t icle force as well as i ts relat ionship wi th the gravi ty of dif ferent samples, the effects of mean par t icle size and fine part icle content on the f lowabi l i ty and the discharge proces s of pulverized coal were revealed. The resul ts predicted by the model were also verified by the visual izat ion platform in the lab and the indust r ial unit. The research resul ts indicate, as the mean par t icle size decreases and the fine par t icle content increases,the f lowabi l i ty of pulverized coal becomes weaker and there is a t ransi t ion f rom arching-br idge to arching-freeflow dur ing the discharge. The research work can provide a useful reference for improving the f lowabi l i ty of feeding pulverized coal and enhancing the stabi l i ty of pulverized coal feeding system.