自动控制在煤粉过滤器反吹系统中的应用

摘要在干煤粉气化工艺中，现在普遍使用的一种低压煤粉过滤器是脉冲袋式过滤器。为了防止煤粉附着在滤袋上，造成滤袋前后压差增大，过滤面积减少，需要通过远程自动控制脉冲阀组对滤袋进行定阻清灰或定时清灰，从而使袋式过滤器达到良好的运行效果，保证整个装置的长周期稳定运行。

Auto-control in Powdered Coal Filter Back-flushing System

In the pulverized coal gasification process, the pulse bag filter is widely used. In order to protect the coal dust from attaching to the filter-bag which can result in an increased pressure before and after the filter bag and can reduce the filtering area, the remote auto-control of the pulse valves was implemented to regularly re- move the coal ash so that the bag filter can be in well service and the entire device in long-term and stable op- eratlon