Stainless Steel Vacuum Double Effect Falling Film Evaporator

Product Description:

The double effect falling film evaporator is a high-efficiency concentration device designed based on the principle of "double effect evaporation + falling film heat transfer". Its core function is to reduce the solvent content in liquid materials, and it is widely used in food, pharmaceutical, chemical, and other industries. ​

The workflow is divided into two-effect synergy: In the first-effect evaporator, the preheated material flows downwards in a thin film along the inner wall of the heating tube through a film distributor, while being heated by steam. The secondary steam generated by the vaporization of the solvent in the material is not directly discharged but is introduced into the second-effect evaporator as the heating source for the second effect. The second effect operates at a lower pressure, using the secondary steam from the one effect to continue heating the material and further vaporize the solvent. Finally, the steam generated by both effects enters the condenser for condensation and recovery, achieving "energy cascade utilization" and saving 40% to 50% energy compared to single-effect equipment. ​

The core components of the equipment include first/second-effect evaporators, preheaters, film spreaders, condensers, vacuum pumps, etc. Due to the film-like flow of the material, the heat transfer area is large and the heating time is short (only a few seconds), which can effectively protect the active ingredients of heat-sensitive materials such as fruit juice, Chinese herbal extracts, and biological agents. At the same time, it has the advantages of high concentration efficiency, low material retention, and stable operation. It is suitable for processing material solutions with concentrations ranging from 10% to 40%, and can ultimately increase the solid content to 50% to 70%.