Direct Steam Injection System
Process Description
Products to be processed are blended in the batching system and transferred to the system’s product
balance tank. Centrifugal booster and stuffing pumps pump the product through the plate heat exchanger
raw regenerator and pre-heater, stuffing the system’s timing pump. The meter based timing system precisely
controls the flow through the steam injector where the product is heated to final process temperature prior to
the holding tube. From the holding tube the product is flash cooled to the same temperature at which it
entered the steam injector. This removes all the water which was added with the steam injection process
along with any undesirable flavor from the process’ heat treatment. After flash cooling, the product is
aseptically homogenized prior to further regenitive cooling and final cooling to the desired packaging
temperature. Product then flows to either an aseptic designed surge tank or to the packaging equipment.
Process System Features
- fastest means of UHT processing
- Available for aseptic and extended shelf life products
- Eliminates peppering seen in infusion chamber designs
- Accurate flow control due to meter based timing
- Precise mean residence time of each particle
- Use of holding tube pressure control loop eliminates the effects of product viscosity changes
- Level control in vacuum/flash chamber only
- Easy inspection and cleaning of high temperature areas
- No pumps located in high temperature area thereby reducing maintenance costs
