对交变压锁斗系统粉煤下料不畅问题的研究
2017-10-18方玉虎李晓宏张涛等
方玉虎+李晓宏+张涛等
摘 要:该文基于粉煤输送对粉煤气化的重要影响,通过研究粉煤性质以及对粉煤锁斗的控制,分析了粉煤锁斗下料不畅的原因。结果表明,影响粉煤锁斗下料的因素有:粉煤的粒径、粉煤的水分、休止角、粘附性以及工艺控制粉煤的温度控制、锁斗气量分配、锁斗加压方式等。并且通过对粉煤锁斗输送的影响因素的研究分析,提出了优化控制思路以及预防的措施。
关键词:气化技术;粉煤锁斗;粉煤;下料不畅;影响因素
中图分类号 TQ546.1 文献标识码 A 文章编号 1007-7731(2017)18-0142-03
Study on the Problem of Pulverized Coal Feeding in the Alternating Pressure Lock Bucket System
Fang Yuhu et al.
(Yanchang Petroleum (Group) Hydrocarbon Utilization Technology Research Center,Xi'an 710000, China)
Abstract:Based on the important influence of pulverized coal transportation on the gasification of pulverized coal, through the study of the characteristics of pulverized coal and the control of pulverized coal lock bucket, this article analyzed the reasons of the poor performance for pulverized coal lock bucket. The results show that the factors influencing the pulverized coal lock hopper feeding are: pulverized coal particle size, coal moisture,angle of repose, adhesion and process control of coal powder temperature control, distribution of amount of gas, the way of increase pressure etc.From analysis of the influencing factors of pulverized coal lock bucket transportation, this article put forwards the optimized control ideas and preventive measures.
Key words:Gasification technology;Pulverized coal lock bucket;Pulverized coal;Sluggish material;Influencing factors
粉煤加壓工业技术有:Shell气化技术、GSP气化技术、HT-L气化技术、温克勒气化技术,常见的粉煤输送技术有固体泵输送技术和较为广泛应运的锁斗输送系统。锁斗是煤化工行业中应用最常见的设备,尤其在一些加压的粉煤及煤渣气力输送系统中有着广泛的应用。锁斗一般安装在常压容器和加压容器之间。粉煤由粉煤缓冲仓落入对应的粉煤锁斗后高压CO2为粉煤锁斗加压后,锁斗中的粉煤落入对应的粉煤给料仓,经对应的粉煤给料仓、粉煤加压给料器送入气化炉。锁斗是粉煤输送系统的关键设备,受到粉煤性质、锁斗选型、操作方法等各方面的影响,粉煤会在锁斗内架桥,导致下料不畅,乃至进料中断。
1 粉煤锁斗下料不畅的主要因素
粉煤性质(粒度大小、水分、休止角、粘附性、光洁度等)、锁斗选型(锁斗锥部夹角、锁斗锥部材料)、锁斗操作方法(锁斗内粉煤的温度、加压方式)等众多因素都会导致锁斗内粉煤下料不畅。……
