The ThermaBlend® provides up to 50% more heat transfer area than conventional hemispherical kettle or other conventional jacketed cookers. The agitator design minimizes shear and the bidirectional scraper system minimizes burn-on, making these cookers a superior thermal processing solution.
The ThermaBlend® Cooker is a versatile unit specifically designed for large-scale batch operations.
• Reversing agitators with VFD speed control from 6 – 30 RPM • Wrap around steam jacket, 90 – 130 PSI with SS heat shields • RTD probe with digital steam controller • Hinged, air operated, domed gasketed cover • Single or dual air-operated discharge doors • Solenoid air valves control cover and discharge doors • Direct or indirect steam injection • Vacuum cooling package • Electropolished interior finish • Cryogenic cooling • Direct steam injection • Kettle valve options • Serpentine liquid jacket • CIP seal assemblies, spray balls
Controls • NEMA 4x controls: recipe & batch • Multistep control packages • Heavy-duty drive upgrade • Cooling water control package • Dual zone steam jackets • Load-cell weighing system • Storage and data Acquisition • HMI (Human Machine Interface)
Mixer-Cookers are another example of application ingenuity, used in applications absent of burn-on challenges. Mepaco® engineers provide a customized solution modified to production and application goals.
What are the options for cooling product after a cook cycle?
The options are Cryogen (CO2 or N2), vacuum cooling or cooling jacket. Consult your Mepaco representative for application support.
Which method is more effective for cooling, indirect steam (jacket) or direct steam injection?
Direct steam injectors are more efficient for cooking; however the formulation will pick up moisture. In addition to higher efficiencies, direct steam does not require a scraper used to prevent burn-on to the inside surfaces of the tub.
When are scrapers needed?
Scrapers are needed when the potential for burn-on exists. This is typical when using indirect methods for cooking. Scrapers eliminate burn-on which reduces the heat transfer coefficient. Scraper systems also provide cooking consistency with sensitive cooking applications.
Do scrapers need to be removed for cleaning?
Scrapers can be clean-in-place or removed for cleaning, depending on product and sanitation protocol.
When do scrapers need to be replaced?
If the scraper doesn’t function properly and leaves residual burn-on, it is a sign that the scraper needs to be replaced. Upon visual inspection, the edges of the scraper will be rounded and worn at which point the scraper needs to be replaced.
How do I know if I need a ThermaBlend™ or a Mixer-Cooker?
If product needs to be scraped, a ThermaBlend™ is recommended since it is designed with a “wrap around” jacket. In addition, when you are cooking and cooling in the same vessel, the ThermaBlend™ design lends itself to the drastic changes in temperatures.
How do I know if I need a dual or single screw?
Applications with thick and dense product need a dual screw. Also, if you have a variety of suspended solids, the dual screw units tend to do a good job of mixing and cooking while maintaining a homogeneous blend – even for the most delicate particulates. Single screw units are often used for sauces, soup bases and lighter, less viscous products.
What do you recommend for indirect chilling?
The use of a serpentine style jacket is a possibility, but there may be issues with inefficiency and cross contamination of system media. Consult Mepaco’s technical team about your application.
When running partial batches, is there a way to optimize the system cooker?
We recommend a dual zone jacket when cooking with indirect steam. This allows you to only heat up the zone required to complete the the batch, saving energy and cost.
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