双循环流化床化学链燃烧反应器冷态实验研究

针对化学链燃烧反应器，特别设计了双循环流化床反应器。提出“鼓泡流化床/湍动流化床+提升管”的设计，通过提升管提供颗粒循环的动力，调整2个流化床反应器(空气反应器和燃料反应器)的流化气速以分别控制反应器的固体循环流量；提出双向流动密封阀的设计，形成对固体循环流量和床料量分布的柔性控制。建立了全尺寸双循环流化床冷态实验装置，并进行了连续稳定的冷态运行，实验研究了不同运行操作条件对反应器性能的影响。实验结果表明，流动密封阀内压力差范围在955~1834 Pa，固体循环流量范围在0.27~0.38 kg/s，双循环流化床之间的气体泄漏率为0.10%~0.22%。冷态实验提供了流体动力学参量，并验证了设计的可行性。

Cold-Model Experiment of Dual Circulating Fluidized Bed Reactor for Chemical Looping Combustion

The dual circulating fluidized bed reactor was designed for chemical looping combustion. The reactor was set as a turbulent bed or bubbling bed connected with a riser, respectively, which provided the driving force for the solid circulation. The solid circulation rate was adjusted by the gas velocity in the fluidized bed reactor. A two-way loop seal was configured to regulate flexibly the solid circulation rates and the mass distribution of the bed inventories in the system. A full scale cold-model dual circulating fluidized bed reactor was built. A continuous operation of the cold-model was investigated on the effects of the operational parameters on the performance of the reactor. The results show that the range of the pressure difference of loop seal is 955-1834 Pa, the solids circulation rate is 0.27-0.38 kg/s, and the gas leakage is 0.10%-0.22%. Our cold-model experiment provides the fluid dynamic parameters, and verifies the feasibility of the reactor design.