Radiant syngas cooler (RSC) is a crucial heat recovery equipment for entrained-flow coal gasification. Ash depositions in the industrial RSC endanger its operation efficiency and operation safety. In this work, the critical viscosity model and the ash shedding model are coupled to explore the ash deposition behavior in the industrial RSC for a 2000 t/d entrained-flow coal gasifier. Simulation results are in good agreement with the industrial conditions. The results show that ash depositions in RSC are mainly distributed in the upper part and the bottom cone, and the maximum ash thickness are 9.67 mm and 36.71 mm respectively. Due to ash depositions, the outlet temperature of RSC increases by 19.76 %, the total heat transfer rate decreases by 21.88 %, and the steam yield decreases by 22.41 %. Employing low-ash coal as gasification raw coal is a good suggestion to enhance the operation performance of the industrial RSC. Moreover, when the industrial RSC is fully loaded, an appropriate increase in syngas mass flow rate can also contribute to a better operation performance.

辐射合成气冷却器（RSC）是气流床煤气化的关键热回收设备。工业RSC中的灰烬沉积危及其运行效率和运行安全。在这项工作中，将临界粘度模型和灰分模型耦合起来，研究了 2000 t/d气流床煤气化炉在工业 RSC 中的灰分沉积行为。仿真结果与工业条件吻合较好。结果表明，RSC内的灰分沉积主要分布在锥体的上部和底部，最大灰分厚度分别为9.67 mm和36.71 mm 。分别。由于积灰，RSC出口温度升高19.76%，总传热率降低21.88%，产汽量降低22.41%。采用低灰分煤作为气化原煤是提高工业 RSC 运行性能的良好建议。此外，当工业RSC满载时，适当增加合成气质量流量也有助于更好的运行性能。