The utility model relates to a water wall pipe combined anti grinding device for a circulating fluidized bed boiler. Including water-cooled furnace and arranged in the furnace tube, which is characterized in that spaced around the furnace combined anti abrasive wear combined crony; crony set an abrasion resistant coating or brushing in arc spraying and anti abrasion layer covering the overlap boundary crony and abrasion resistant coating substrate layer of water wall tube; abrasion resistant coating layer and wear crony boundary layer overlapping, refers to the abrasion resistant coating layer or arc spraying wear layer side by side the overlapping coverage of 5 ~ 10cm. Combined multi-layer arrangement anti track grinding crony can change the combustion particles quickly landing, reduce the abrasion of water wall, prolong the operation cycle wear. Abrasion resistant coating layer is very thin, not only to wear, and does not affect the heat transfer; plasticity of anti abrasion wear resistance layer of good construction site office, plastic, without stent template; combined with abrasion resistant coating layer is complementary, anti abrasion performance.
【技术实现步骤摘要】
本技术涉及一种循环流化床锅炉水冷壁管组合式防磨装置。
技术介绍
循环流化床锅炉(Circulating Fluidized Bed Boilers，简称CFB)可以采用劣质 煤和油页岩等作为燃料，表现出比其他锅炉更强的竞争力。迅速在全世界的电站锅炉、工业 锅炉和废弃物处理利用等各领域都取得了广泛的应用。但是，循环流化床锅炉运行中，高速烟气冲过锅炉水冷壁受热面，在烟气中又含有 形状不规则的硬质固体煤颗粒，这些颗粒流经过热面时，就会对管壁产生撞击摩擦，管壁因 高温、磨损而变薄直至造成爆管。现有技术中的防磨措施，或在浇注料与水冷壁管交接处采用“让管”来消除在此部 位因涡流而造成的磨损，延长锅炉的运行周期；或在易磨损处单独整体喷镀(涂)金属耐磨 层；或敷设塑性耐火材料耐磨层；或敷设耐火浇注料耐磨层；或采用金属耐磨层加可塑性 耐火材料耐磨层。现有技术的同不足是，不管采用何种防磨措施，均不可避免地造成磨损区域上移。 又无法对从燃烧室密相区卫燃带到炉膛燃烧室稀相区的之间，整体喷镀(喷涂)金属耐磨 层或敷设塑性耐火材料耐磨层。如果整体喷镀或敷设耐磨层，将产生传热面积减少、锅炉...
【技术保护点】
一种循环流化床锅炉水冷壁管组合式防磨装置，包括炉膛和设置在炉膛内的水冷壁管，其特征是在炉膛四周间隔设置组合式防磨裙带； 所述的组合式防磨裙带设置为由涂刷或喷涂在水冷壁管基材上的耐磨涂料层与可塑性防磨裙带层相邻边界重叠覆盖而构成； 所述的耐磨涂料层与可塑性防磨裙带层相邻边界重叠覆盖，是指耐磨涂料层的一侧被可塑性防磨裙带层一侧重叠覆盖５～１０ｃｍ。
【技术特征摘要】
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