近年来,在炉膛向火侧的结渣和腐蚀问题日趋严重,其原因是出于经济上的考虑而在现有机组上增加了燃用廉价燃料的比例。另外,考虑到含硫燃料的环保限制,在现代的一些高压锅炉上也提高了临界烟温范围。现在锅炉制造工作者正在从事一项新的工作,通过设计新锅炉和改造一些老锅炉来处理这些问题,其中包括继续降低炉膛局部热负荷和增大炉膛容积,使进入节距较小的受热面之前灰粒已得到足够冷却而不会粘在管壁上;采用较大的节距防止对流管束间结渣搭桥;利用烟气再循环或布置凝渣管来控 In recent years, the problem of slagging and corrosion on the fire side of the furnace has become more and more serious. The reason for this is that for economical reasons, the proportion of low-cost fuel used in existing units has been increased. In addition, given the environmental constraints of sulfur-containing fuels, the critical smoke temperature range is also increased in some modern high-pressure boilers. Boiler manufacturers are now working on a new job to address these issues by designing new boilers and retrofitting older boilers, including continuing to reduce the furnace’s local heat load and increasing the hearth volume to gain access to less heated surfaces Before the ash particles have been sufficiently cooled without sticking to the pipe wall; Adopt a larger pitch to prevent the convection tube bundle slag bridge; Use of flue gas recirculation or layout of the coagulation pipe to control