Goswami Sunil, Pant H J, Sharma V K, Varshney Lalit
Isotope and Radiation Application Division, Bhabha Atomic Research Centre, Mumbai, 400085, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India.
Isotope and Radiation Application Division, Bhabha Atomic Research Centre, Mumbai, 400085, India.
Appl Radiat Isot. 2019 Jul;149:22-30. doi: 10.1016/j.apradiso.2019.04.013. Epub 2019 Apr 11.
Radiotracer investigations were carried out for measurement and analysis of residence time distribution (RTD) of coal particles in a pilot-scale gasifier fitted with a flat air/steam distributor. Measurements were made at different operating conditions using gold-198 (Au) labeled coal particles as a radiotracer. The measured RTDs were treated and mean residence times (MRTs) were determined. Furthermore, the treated RTDs were simulated using a suitably conceptualized mathematical model and detailed information about hydrodynamics of coal particles within the gasifier was obtained. Results of model simulation indicated that the gasifier behaved as an ideal mixer of fine coal particles exiting from the top of the gasifier. A small fraction of the coarser particles was found to be bypassing at ambient temperature.
使用放射性示踪剂对装有扁平空气/蒸汽分布器的中试规模气化炉内煤颗粒的停留时间分布（RTD）进行了测量和分析。在不同运行条件下，以金 - 198（Au）标记的煤颗粒作为放射性示踪剂进行测量。对测得的RTD进行处理并确定平均停留时间（MRT）。此外，使用适当概念化的数学模型对处理后的RTD进行模拟，从而获得关于气化炉内煤颗粒流体动力学的详细信息。模型模拟结果表明，该气化炉表现为从气化炉顶部排出的细煤颗粒的理想混合器。发现一小部分较粗颗粒在环境温度下发生旁路。
