MAKHACHKALA, March 24 – RIA "Dagestan". Researchers at Dagestan State Technical University have developed and obtained a patent for a device for preheating fruits or vegetables directly in jars before sealing and sterilization.
Steam treatment is used to preserve flavor, texture and extend product shelf life. The new device supplies saturated steam in short pulses—in portions. Unlike traditional continuous flow, this approach allows for even heating of the product without overheating and with minimal energy consumption.
The system features a conveyor belt that carries jars beneath a nozzle-equipped unit that emits steam. A key advantage is the unit's adjustable height, which can be easily modified to accommodate different jar sizes and secured with a screw. The design also prevents condensate from accumulating inside, ensuring uninterrupted operation.
According to the developers, the system offers three key advantages. First, shorter sterilization times enable higher product throughput. Second, uniform pulsed heating prevents overcooking, helping fruits better retain their shape, taste, and aroma. Third, reduced steam consumption lowers energy costs for the enterprise.
The device is suitable for use with both glass and tin jars at any facility processing fruits, vegetables, and other plant-based raw materials.