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In the present research, a parametric study of a pilot-scale gas–solid vortex reactor (GSVR) with static geometry dryer has been carried out. It is an intense and clean energy technology of the granular material drying, which is highly applicable in various industrial operations, namely particulate coating, granular drying, mixing, agglomeration, separation, milling, combustion, etc. The foremost feature of this reactor is its compact size through which higher heat and mass transfer take place. Observing intense heat and mass transfer characteristics of the GSVR reactor, a pilot-scale GSVR dryer has been developed that dry the granular material rapidly. The goal of the present study is to examine the performance of the developed reactor, by means of experimental investigations, considering various operating parameters such as air pressure, temperature, suspension density, drying air temperature, airflow rate, and inventory of paddy. The results obtained from the experimental study revealed that the maximum and minimum time of drying is found to be 40 and 20 min for the maximum and minimum loading capacity of 1000 and 400 g, respectively. Hence, overall drying efficiency is improved by increasing the inventory of paddy (800–1000 g).

Experimental study of food grain drying in a gas–solid vortex reactor