Hot air drying tunnel for fruit esp. prunes - with recuperative cooling tunnel discharging trucks through open exit
Реферат: A drying plant for prod. which is carried on trucks through heat transfer tunnels. The plant is of the type which has a preheating tunnel followed by a main drying tunnel. Hot air is blown counter-current to the trucks in the pre-heater and co-current in the main tunnel. Part of the air discharged from the exit of the main tunnel is recycled to the gap between preheater and main tunnels to divide between them, provision being made for periodic withdrawal of trucks and the regulation of make-up air. All air now enters the system via a cooling tunnel added downstream of the main tunnel. The truck cooler serves as a recuperator returning heat to the two tunnels upstream. Air flow regulation is entirely by adjusting the effective lengths of the preheating and cooling tunnels. The cooling tunnel discharges trucks directly to atmos. with no door. Used for drying truck-loads of prod. in hot air tunnels, e.g. fruit and esp. prunes. Air flow does not have to be stopped and a door opened to discharge a truck. Thermal efficiency is raised by heat recovery in the cooling tunnel. Discharged trucks are cooled and easy to handle.
Drying device for fruits - on roller conveyor with hot air directed upwards thus reducing contact pressure
Номер патента: FR2351609A1. Автор: . Владелец: Xeda International SA. Дата публикации: 1977-12-16.