Air-jet cover for heat treatment chamber

Abstract

To increase the efficiency of local exhaust hoods for removing harmful substances emitted during technological processes, air is supplied by jets to create an air curtain (air-jet covers). The air curtain prevents the spread of harmful substances, does not interfere with the technological process, and leaves the equipment open for control and monitoring. The device of local supply and exhaust ventilation of the open doorway of the UKM Classic M 2005 chamber made by Mauting is considered. The chamber is designed for heat treatment of meat products in the food industry. Geometric models have been developed, including a heat treatment chamber, a room from which the chamber is loaded, a supply and exhaust hood above the door from the chamber to the room, and a supply air duct with air distribution devices. For comparison, an option of using an exhaust hood without supply air was also studied. The STAR-CCM+ software package was used as a calculation program. The results of computational experiments on modeling the operation of the local ventilation system of the heat treatment chamber are presented. The analysis of the calculation results and comparison of the efficiency of local ventilation devices are carried out. The studied design of the supply and exhaust hood ensures that heat and gases coming out of the heat treatment chamber are captured at a 17% lower supply and exhaust air flow rate compared to the exhaust hood.