近年来,在对以烟管为主要受热面的WNG、WNL型卧式内燃锅炉的检修中,我看到,前后管板上数以百计的管端中,唯独与炉膛出口烟气接触的烟管管端经常损坏、发生渗漏。这类锅炉虽属淘汰之列,鉴于当今快装锅炉供不应求,对不少小企业来说,它仍旧在服役中。为了保证它的安全运行,笔者对 In recent years, in the overhaul of WNG and WNL horizontal internal combustion boilers with smoke tube as the main heating surface, I have seen that among the hundreds of tube ends on the front and the back tube plates, only the flue gas at the outlet of the furnace is in contact The pipe end of the pipe is often damaged and leaks occur. Although these types of boilers are eliminated, in view of the current shortage of fast boilers, for many small businesses, it is still in service. In order to ensure its safe operation, I right