Water Cascade Retort

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Water Cascade Retort

Cascade retort is equipped with a heat exchanger for heating and cooling, thus preventing products from being contaminated by steam and cooling water while also eliminating the need for water treatment chemicals. The process water flows from top to bottom in a uniform manner via the large-flow water pump and metal plate in the top of the retort. Accurate temperature and pressure control make this sterilization retort perfect for sterilizing food and beverages packaged in various containers.

Application

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

Features

Accurate temperature control, excellent heat distribution: The temperature control module developed by DTS allows for up to 12 stages of temperature control. The heating mode is available in step or linearity to accommodate the specific formulations of different products. Thus, the repeatability and stability between batches of products are well ensured, with a temperature accuracy within ±0.5℃.

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 whether 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 in 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 emptying air from the retort prior to heating, resulting in significant steam savings of 30%.

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)
P-1002	1000	1600	1.49	3200	1850	2200	745×665×631	147/156	0.44/0.56	0.35/0.45
P-1003	1000	2400	2.12	4000	1850	2200	745×665×631
P-1203	1200	2700	3.45	3800	2350	2400	860×800×775
P-1204	1200	3600	4.47	4400	2350	2400	860×800×775
P-1205	1200	4500	5.49	5300	2350	2500	860×800×775
P-1403	1400	3000	5.24	3900	2450	2700	920×920×915
P-1404	1400	3900	6.62	4800	2450	2700	920×920×915
P-1504	1500	4250	8.26	5200	2600	3250	1000×1000×975
P-1505	1500	5300	10.12	6300	2600	3250	1000×1000×975
P-1605	1600	5650	12.27	6700	2900	3300	1070×1070×1050
P-1606	1600	6800	14.58	7900	2900	3300	1070×1070×1050
P-1805	1800	6500	17.81	7400	3100	3500	1220×1220×1170
P-1806	1800	7800	21.12	8700	3100	3500	1220×1220×1170

How It Works

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

Next, inject process water into the resort. The water can be pre-heated for sterilizing hot-filling products.

Then, switch on the circulation pump to make the process water repeatedly circulated and sprayed through the nozzles and the tubes, so as to ensure the whole retort is uniformly heated.

The tubular heat exchanger in the retort allows the process water to flow in one side, and the steam in the other, so that germ-free sterilization can be achieved as the product won’t come directly into contact with the steam. 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.

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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