Double Effect Falling Film Evaporator
Application
Double effect falling film evaporator
The double-effect falling film evaporator integrates down-flow evaporation with multi-effect evaporation to enhance thermal efficiency and reduce energy consumption. This design retains the advantages of conventional down-flow evaporators, including short heating time and effective preservation of the original flavor of materials, making it particularly suitable for heat-sensitive products.
Equipment Structure
The equipment includes but is not limited to the following systems: first and second effect heaters, first and second effect separators, a condenser, an optional heat press pump, a vacuum and drainage system, circulating or conveying pumps, an operating platform, an electric control cabinet, and the valve and piping system.
Working Principle
Under vacuum conditions, a corresponding pressure pump is used to extract and heat the liquid contained within the system. This process primarily utilizes circulation between the pipes to generate the desired reaction.
During evaporation, the continuous circulation and heating of the material increases its flow velocity within the pipes, ensuring uniform heating of the product and effectively preventing the "dry wall" phenomenon.
Features
The double-effect down film evaporator operates efficiently even with a low effective temperature difference, resulting in minimal heat loss.
Featuring a short material heating time and the ability to run at lower temperatures, it is ideally suited for the evaporation and concentration of heat-sensitive materials.
The system demonstrates excellent adaptability to materials that are highly foaming or have a high concentration ratio.
A high heat transfer coefficient is achieved as the material inside the tubes forms a thin, turbulent film under the combined effect of gravity and the high-speed entrainment of secondary steam.
With low material holdup, the system allows precise adjustment of material retention time.
It supports both automatic and manual operation, offering ease of cleaning and reliable performance.
Scope of Application
◆ This equipment is suitable for the concentration of various materials in the food industry, such as tomato sauce, jam, milk, juice, watermelon juice, bone broth extract, hawthorn juice, chili products, honey, and other chemical or food substances. It is particularly ideal for concentrating heat-sensitive materials, as the process is conducted under vacuum at low temperatures. Both intermittent and continuous concentration operations are supported.
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