The outer loop with a single effect evaporator system, where the material is concentrated in such Chinese traditional medicine, Western medicine, glucose, sucrose, oral liquid, chemical, food, dairy products and the acquisition of MSG and industrial organic solvents such as alcohols. Suitable concentrated low temperature and vacuum rarely lot and varieties. A single heat-sensitive material under the effect of the external characteristics of the circulating evaporator 1. Alcohol acquisitions: large capacity recovery and vacuum concentration process makes it part of the production capacity of the secondary counter five to ten times, and can reduce energy consumption by 30%, with a small investment and high profits, the acquisition rate. 2. Concentration of the liquid: The device uses external heating natural circulation and vacuum evaporation characteristics of rapid evaporation and a concentration ratio of modes: 3; foam concentrate liquid material is not completely sealed state. Provided by means of liquid concentrated flavor and a thick non-polluting agents and easier to clean (it just opened up and down the lid clean). The device is easy to handle, it requires a small base area for installation. Stainless steel heater and evaporator heat purposes. Polyurethane material for heat conduction. Sand surface grinding and surface polishing, meeting 高标准 standard.