Steam-Air Retort

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Steam-air retort is a batch type autoclave used for sterilizing food products packaged in nearly all types of cans. Two steam pipes are installed at the bottom of the batch retort to provide heat into the retort chamber, without exhausting process. A large-flow axial fan located inside of the retort is used as driving force to mix the steam with the air, and circulate the steam-air mixture that is used as heating medium to flow throughout the retort for uniform sterilizing of canned foods.

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Steam-air retort is suitable for sterilizing nearly all types of glass and metal cans (excluding sausage casings).

Working Principle
Sterilization: The sterilization process begins by introducing steam into a steam-air retort. Inside the steam-air retort, there is a circulating fan that rapidly circulates the steam and air at a high speed. This circulation ensures that the temperature inside the retort is equally distributed throughout. Gradually, the temperature inside the retort is increased and adjusted to reach the desired temperature and pressure range. This adjustment is achieved using a pressure-adjusting valve and an exhaust valve. The pressure-adjusting valve controls the pressure, while the exhaust valve helps in reducing the pressure when necessary.
Cooling: To create a closed system for sterilizing water, it is injected into the retort. The sterilizing water is then circulated within the closed system by a circulating pump. This circulation creates a mist that covers the surface of the sterilizer, ensuring effective sterilization. At this stage, the cooling process begins. Cooling water is introduced into a heat exchanger, which helps reduce the temperature of the circulating water gradually. The cooling continues until the desired temperature level is reached.
Blowdown: The blowdown valve expels the remaining sterilization water, while the exhaust valve is used to reduce the pressure inside the retort. Features Energy efficient, this steam-air retort can save approximately a quarter of the steam required in a conventional steam sterilizer. When comparing to water spray retort and water immersion retort, the steam-air retort eliminates the need for steam used for water heating because that it does not use hot water as heat transfer medium. Steam is produced from the boiler treatment using sterile water, and then leaves the boiler through piping to uniformly transfer heat to the retort chamber. Large-flow axial fan has a robust structure, providing long service life. Installation Diagram Steam-air retort operates at customer's site Specifications

Model	Diameter (mm)	Length (mm)	Wall thickness (mm)	Capacity (m3)	Dimension (mm)			Max. working pressure (MPa)	Max. working temperature (°C)	Approx. retort weight (kg)	Approx. operating weight (kg)	Power (kW)	Voltage (V)
					L	W	H
QH10-2	1000	1800	4	1.65	3360	1470	1650	0.3	130	1560	2060	3	380
QH12-4	1200	3600	5	4.46	5460	1700	1850	0.3	130	1120	3560	5.5	380
QH14-4	1400	4000	6	6.77	5760	1900	2200	0.3	130	2760	4720	7.5	380
QH15-4	1500	4000	6	7.82	6260	2000	2400	0.3	130	3360	6160	11	380
QH15-5	1500	5000	6	9.59	7110	2000	2400	0.3	130	3510	6260	11	380
QH15-6	1500	6000	6	11.35	7960	2000	2400	0.3	130	3760	6960	11	380

Tags: steam spray autoclaves steam-air sterilization retorts sterilizing machine food processing retort food sterilizing retort