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目前,UG—35/39风力机械抛煤炉普遍存在着后拱二次风管使用时间不长就损坏的缺陷。不仅降低了锅炉效率,而且造成了一定的经济损失和不必要的检修费用。原后拱二次风管设计在后拱之中,风管φ300×3mm,风嘴φ60×3mm,风嘴角度为15°,后拱长期承受煤块的击打。特别是两侧的耐火混凝土被击打损坏后,抛煤机抛出的大煤块直接击打在后拱二次风管的端部,由于炉内高温炉火的烘烤和煤块的击打,后拱二次风管使用时间不长就发生严重变形。每年要检修3～4
At present, UG-35/39 wind power coal-throwing furnace ubiquitous use of the secondary arch after the second duct damage is not long on the defect. Not only reduces the boiler efficiency, but also caused some economic losses and unnecessary maintenance costs. The original arch after the secondary duct design in the back arch among the duct φ300 × 3mm, nozzle φ60 × 3mm, nozzle angle of 15 °, after the arch long-term to withstand the hit coal. Especially on both sides of the fire-resistant concrete is damaged after hitting the thrown coal thrown large coal directly hit the end of the secondary arch of the rear arch, due to the furnace heat of the fire and briquette firing After playing, after the second arch duct used a long time on the serious deformation. Every year to repair 3 ~ 4