Development of advanced technique to improve energy efficiency of up draft coal gasifier with reduced pollution discharges

Abstract

quotRadhe Renewable Energy Pvt. Ltd. in Rajkot has developed an updraft hot filtration coal gasifier technology with a coal consumption capacity of approximately 35 metric tons per day for various industrial applications. This gasifier is designed to supply clean fuel gas for a porcelain insulator manufacturing plant at Bikaner Ceramics in Rajasthan. newline newlineThe present study involves a series of experimental runs aimed at examining the influence of two operating variables equivalence ratio (ER) and steam coal ratio (SCR) as well as how their interactions affect the gasifier performance metrics, like higher heating value, cold gas efficiency, and carbon conversion efficiency, using Indonesian coal. In order to maximize the coal gasification process, the steam coal ratio (SCR) fluctuates between 0.2 and 0.6, and the equivalence ratio (ER) inside ranges between 0.2 and 0.4. The response surface optimizer tool in Minitab Software has been employed to determine the optimal values for the equivalence ratio and steam coal ratio that maximize syngas quality. newlineThe optimum values obtained using the Response Surface Optimizer tool indicate an equivalence ratio of 0.3699 and a steam coal ratio of 0.499. These parameters yield syngas with an increased higher heating value (HHV) of up to 22.32 MJ/kg, an improved cold gas efficiency (CGE) of up to 84.90%, and an enhanced carbon conversion efficiency (CCE) of up to 97.90%.