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采用“湍动床+快速床”作为煤基化学链燃烧(CLC)系统的空气反应器(AR),鼓泡床作为燃料反应器(FR),设计了流动密封阀和旋风分离器,分别用于隔绝2个反应器之间的气氛和进行气固分离,在冷态试验装置上分析研究了CLC系统的压力分布、固体循环流量、气体泄漏率及煤灰与循环载体的分离效果.结果表明:该串行流化床反应器之间气氛隔绝性良好,气体泄漏率较低,固体循环流量达到甚至超过设计标准,FR二级旋风分离器的分离效率接近100%,FR中煤灰进入AR的质量分数小于1.55%,煤灰分离效果良好;装置可以长时间连续稳定运行,且操作气速范围较广,自行设计建造的循环流化床作为煤基化学链燃烧试验装置是可行的.
The air reactor (AR) of coal-based chemical chain combustion (CLC) system was adopted as the “turbulent bed + rapid bed”. As the fuel reactor (FR), the bubbling bed was designed with flow sealing valve and cyclone separator. Respectively used to separate the atmosphere between the two reactors and conduct gas-solid separation. The pressure distribution, solid circulating flow rate, gas leakage rate and the separation effect of coal ash and circulating carrier were analyzed and studied in the cold test device. The results show that this series fluidized bed reactor has good gas insulation, low gas leakage rate, solid circulating flow rate even up to the design standard, and the separation efficiency of the FR secondary cyclone is close to 100% The mass fraction of AR into the AR is less than 1.55%, and the effect of coal ash separation is good. The device can operate continuously and steadily for a long time with a wide range of operating gas velocities. It is feasible to design and construct a circulating fluidized bed as a coal-based chemical chain combustion test device .