Water Immersion Rotary Retort
Water Immersion Rotary Retort
The rotating motion of water immersion rotary retort accelerates the heat transfer rates of the products inside the package and delivers uniform temperature distribution inside the retort. The retort provides reduced come-up times by introducing preheated water from the storage tank. Water conservation is improved by the recapture of process water following the sterilization process.
- Package type: plastic bottles/cups, large-volume flexible pouches
- Food type: dairy products, fruits and vegetables, ready meals and soups, pet foods
- Uniform water flow distribution
- By switching the water flow direction in the retort vessel, uniform water flow is reached at any position in vertical and horizontal directions. This offers even water distribution to the center of every sterilization tray, thus achieving uniform and perfect sterilization effect.
- High temperature and short time sterilization
- Water immersion retort provides reduced come-up times by introducing preheated water from the top storage tank. So, it takes less time to reach the desired sterilization temperature.
- Applicable to quick-wear containers
- Due to the buoyancy effect of immersing in water, there is less stress on the containers during the rotation and thus protecting the product from being damaged.
- Suitable for handling large-volume packages
- This water immersion rotary retort can heat and sterilize the central part of the large canned products (especially the high-viscosity products) in a very short time, which is impossible for a static retort to achieve.
By rotating agitation, it can evenly heat the central part of the high viscosity products in a time manner while achieving high sterilization efficiency. The buoyancy of water at high temperatures helps to protect product, even under high rotational speeds.
- 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.
| 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) |
| | 1400 | 2500 | 4.16 | 4100 | 2450 | 2500 | 938×938×760 | 147 | 0.44 | 0.35 |
| | 1400 | 3500 | 5.70 | 5100 | 2450 | 2500 | 938×938×760 | |||
| | 1400 | 4500 | 7.23 | 6100 | 2450 | 2500 | 938×938×760 | |||
| | 1600 | 3600 | 7.69 | 5300 | 2900 | 3100 | 1000×1000×946 | |||
| | 1600 | 4700 | 9.90 | 6400 | 2900 | 3100 | 1000×1000×946 | |||
| | 1600 | 5750 | 12.01 | 7450 | 2900 | 3100 | 1000×1000×946 | |||
| | 1800 | customized | \ | \ | 3100 | 3500 | \ | |||
| | 1800 | customized | \ | \ | 3100 | 3500 | \ | |||
| | 1800 | customized | \ | \ | 3100 | 3500 | \ |
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 immersion 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.
