Tubular heat exchangers are an ideal choice for processes where hygiene is critical. Here’s why.
Used to reduce or eliminate microbes that might have been introduced into a product, heat treatments such as sterilisation and pasteurisation are widely used by the food and beverage industry.
Sterilisation is the process whereby microbes are completely destroyed, whereas pasteurisation provides a significant reduction in microbial contamination down to an acceptable industry standard.
A critical aspect of both heat treatment processes is having an efficient heat exchanger in place to regulate the fluid temperature in your processing systems.
This ensures you can meet the requirements for pasteurisation, filling operations, and food safety, whilst also producing high volumes of product and allowing for fast cleaning and maintenance.
Using a heat exchanger for sterilisation
Heat exchangers are a critical part of sterilisation procedures in food and drink manufacturing, particularly in high-risk products such as milk and dairy processing.
Using heat at a high sterilisation temperature to destroy potential pathogens and microbes is a simple and effective way to ensure your product remains clean and sterile throughout the manufacturing process, without altering the taste or texture of the finished product.
Heat exchangers for pasteurisation processes
Pasteurisation is necessary for milk and cheese production, beverages, egg processing and a range of other food manufacturing processes. The right heat exchanger provides the exact combination of temperature and time, producing a reliable and uniform result for every run.
For processes such as UHT treatment, pasteurisation, and sterilisation, a key consideration when selecting a heat exchanger is the efficiency of the unit, which will have a significant impact on the lifecycle cost of the equipment.
Heat exchanger selection for sterilisation and pasteurisation
To ensure the success of any sterilisation or pasteurisation process, it’s important to choose a heat exchanger that is fit for purpose, simple to maintain, and precision-engineered to offer the best result for your needs.
Food manufacturers that are considering adding a new piece of equipment to their facility need to look closely at the engineering behind the equipment to ensure it is the right choice.
Both pasteurisation and sterilisation are prime examples of applications where the right heat exchanger can make or break the product. Choosing a heat exchanger that is engineered to meet the specific demands of your industry means you will get a better result in your day to day operations, allowing more efficient production runs and reduced machinery downtime.
Tube and Shell & Tube types are often a great choice, as they are not overly complex, provide high-flow capabilities for fluids and slurries, and are easy to clean and maintain as part of your regular CIP process flow.
Dimpleflo Double Tube Heat Exchangers
The Dimpleflo tube in tube style hygienic heat exchanger allows you to run your product through the middle tube and the service fluid through the surrounding shell. This allows for a completely contained process, making it suitable for processing soft slurries and foods that contain chunks such as soups and diced tomatoes.
The Dimpleflo stainless steel tube has a dimpled profile which is engineered to increase turbulence within the tube. This results in a reduced surface area of the product which in turn, creates higher thermal transfer without significant pressure loss.
In simple terms, the dimpled surface allows manufacturers and processors to achieve faster process times thanks to the higher heat transfer coefficient.
Dimpleflo Multitube /Shell & Tube Heat Exchangers
Designed for food with low or medium viscosities such as sauces, fruit purees, milk and dairy products, the multi-tube heat exchanger range from Teralba provides the same dimpled tube benefits as the double-tube versions, combined with more surface area profile and more heat transfer area.
This type of heat exchanger is engineered to handle elevated temperatures and pressures, within a smaller footprint than a tube-only heat exchanger.
Ideal for steam sterilisation and UHT processing, pasteurising purees, soups and sauces, as well as cooking and cooling, this system is suitable for a wide variety of fluids and gases, meaning you can process different types of products through the one unit.
Get engineering advice for your specific process
The Dimpleflo range of single and multi-tube heat exchangers are an efficient choice for food processing and manufacturing professionals.
Our engineering team is here to help you get the best heat exchanger for sterilisation and pasteurisation, balancing efficiency, quality and innovation with a cost-effective solution.
Please reach out to us today. email@example.com