Water Spray Rotary Retort

Water spray rotary retort utilizes the rotating motion to accelerate the heat transfer rates of the products inside the package. A heat exchanger is used for heating and cooling, thus preventing products from being contaminated by steam and cooling water. The process water is drawn by a water pump, and continuously sprayed onto every inch of products by the spray nozzles distributed throughout the retort for the sterilization goal. Accurate temperature and pressure control make this retort perfect for sterilizing food and beverages packaged in various containers.

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Application

Package type: rigid containers (tin cans, aluminum cans/bottles), plastic bottles/cups/, glass jars/bottles, flexible pouches
Food type: beverages (protein powder, tea, coffee), milk, fruits and vegetables (mushroom, beans), baby food, ready meals and soups, pet foods

Features

Precise pressure control, suitable for different package types: The pressure control module developed by DTS continuously changes the pressure during the entire process to adapt to the pressure variations inside the package. This minimizes the deformation of the package, no matter it is rigid container of aluminum/tin cans, or plastic bottles/boxes, or flexible pouches. The pressure accuracy is within ±0.05bar.

Highly clean product package: Heat exchanger is applied for indirect heating and cooling, thus avoiding secondary contamination caused by the steam and cooling water since they do not come into contact with the process water. Besides, water treatment chemicals such as chlorine are no longer required, and the service life of the heat exchanger can also be considerably extended.

Energy saving and eco friendly: A small amount of process water is used for circulation, enabling the sterilizing temperature to be reached quickly.
Low noise offers a silent and comfortable working environment.
In contrast to direct steam sterilization, there is no need for removing air from the retort prior to heating, resulting in significant steam savings of 30%.

Rotary system has simple structure and stable performance: The rotating body structure is molded through one-pass process, and then undergoes balanced treatment to ensure the concentricity and stability during rotating.
The supporting roller system comes with simple structure, delivering easy maintenance and prolonged service life.
The clamping system adopts double-way cylinders, and the guide structure is stressed to prolong the service life of the cylinder.

In compliance with FDA/USDA certificate: Backed by its team of seasoned thermal processing specialists, DTS has become a member of IFTPS and works in full cooperation with FDA-recognized third-party accreditation bodies. Years of experience in working with many North American customers means we understand the regulatory requirements of FDA/USDA and state-of-the-art sterilization technology.

Specifications

Model	Diameter (mm)	Cylinder Length (mm)	Volumn (m³)	Overall Length （mm）	Overall Width (mm)	Overall Height (mm)	Basket Size (L×W×H/mm)	Designed Temperature (℃)	Tested Pressure (Mpa)	Designed Pressure (Mpa)
Z-X1402	1400	2500	4.16	4100	2450	2500	938×938×760	147	0.44	0.35
Z-X1403	1400	3500	5.70	5100	2450	2500	938×938×760
Z-X1404	1400	4500	7.23	6100	2450	2500	938×938×760
Z-X1603	1600	3600	7.69	5300	2900	3100	1000×1000×946
Z-X1604	1600	4700	9.90	6400	2900	3100	1000×1000×946
Z-X1605	1600	5750	12.01	7450	2900	3100	1000×1000×946
Z-X1804	1800	customized	\	\	3100	3500	\
Z-X1805	1800	customized	\	\	3100	3500	\
Z-X1806	1800	customized	\	\	3100	3500	\

How It Works

First, send the product into the sterilization retort in a basket, with every cylinder pressurized separately. Then close the door, which is secured by a triple safety interlock. The whole sterilization process is then automated and controlled by PLC.

Next, high-temperature water from the hot water tank is injected into the sterilization retort. Once mixed with the product, the resulting mixture is continuously circulated through a high-capacity water pump and a network of expertly placed water distribution pipes. This ensures that the heat is evenly distributed throughout the product as it flows. To further elevate the temperature and achieve proper sterilization, the mixture is then passed through a water vapor mixer and infused with steam.

The sterilization retort features a liquid flow switching device that allows for the direction of water flow in the process tank to be switched, achieving uniform water flow at any position in both vertical and horizontal directions. This results in an excellent distribution of heat and ensures that the product is uniformly sterilized. How fast the retort rotates depends on the specific sterilization technique.

The pressure inside the sterilization retort is set by program-controlled automatic valves that allow compressed air flowing into or out of the resort. Since the technique adopted is water spray sterilization, the pressure can be freely adjusted according to the package of sterilized product, and will not be affected by temperature. This would make the sterilization equipment more widely applicable in three-piece cans, two-piece cans, flexible packaging bags, glass bottles, plastic packaging, etc. Moreover, the cooling water can be recycled to the tank so as to save the heat.

Finally, wait for the alarm signal for completing the sterilization. And the door can then be opened and the product can be unloaded, after which the equipment is ready to sterilize the next batch of products.

The temperature distribution inside the retort has a uniformity of +/- 0.5℃. The pressure is controlled at 0.05 bar.

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DTS is a professional supplier of sterilization equipment and nonstandard sterilizing lines for food and beverage products. We are specialized in the integration of raw material supply, product R&D, process design, manufacturing, finished product inspection, engineering transportation and after-sales service. Our sterilization retorts are available in batch, rotary and continuous modes, and can be applied to process products packaged in all kinds of containers, such as rigid containers, semi-rigid containers, flexible containers, Tetra Recart, etc.

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