#4炉炉膛压力变送器在A级检修前频繁出现堵灰现象，运行中仪表班与自动班的变送器每周都要进行清灰，有时会出现一天吹2-3次的情况，不仅检修人员维护工作量大，并且每次清灰，为了防止炉膛压力保护动作(MFT跳闸)，每次都要退除炉膛压力保护-# 4 furnace furnace pressure transmitter in the A-level maintenance Clogging former frequent phenomenon, running classes and automatic meter transmitter classes every week for cleaning, sometimes 2-3 times a day blowing the situation, not only the maintenance staff to maintain a heavy workload, and each time cleaning, in order to prevent action to protect the furnace pressure (MFT tripping), every time the furnace back pressure in addition to the protection of