返料器是将锅炉分离器分离下来的高温固体物料稳定的送回压力较高的燃烧室内，并且保证气体反窜进入分离器的量为最小。分类有：机械阀和非机械阀两种。
返料器下端及水冷屏、屏式过热器穿过炉顶处均采用膨胀节。
Expansion joint is adopted at the lower extreme of recycling machine, water cooled panel, platen superheater and the place piercing through roof.
用来模拟大粒径煤粒的大颗粒在移动床中随循环物料向下移动并能顺利通过底部的返料器。
Large particles from moving bed can enter the lift of the CFB successfully through loop-seal recycle device.
中温强度高，高温体积稳定，耐磨损，抗熔渣侵蚀。返料器、省煤器炉墙、混合室内墙等部位。
High strength in medium temperature, stable volume in high temperature, wear-proof, anti-slag corrosion, material returner, coal-saver furnace wall and mixing chamber inner wall etc.
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