Original Title: Evaporator Classification Design Selection Information All You Want Is Here 1 Type of evaporator With the continuous development of industrial evaporation technology, The rising film and falling film evaporators are installed in a casing to form a rising-falling film evaporator. After being preheated,molecular distillation systems, the raw material liquid is first raised by the rising film heating chamber,evaporated solution. The high-temperature flue gas is in direct contact with the solution, making the solution boil and vaporize rapidly. The evaporated water is directly discharged from the top of the evaporator together with the flue gas. Generally, the depth of the combustion chamber of this evaporator in the solution is 200 ~ 600mm, and the temperature of the high temperature flue gas in the combustion chamber can reach more than 1000 ℃. However,rotovap distillation, due to the fast heat transfer rate when the gas and liquid are in direct contact, the temperature of the gas leaving the liquid level is only 2 ~ 4 ℃ higher than that of the solution. The nozzle of the combustion chamber is easy to be damaged due to its use at high temperature, so it should be made of high temperature and corrosion resistant materials, and its structure should be considered to be easy to replace. it can be estimated according to the following proportion. For example, In the above categories: W — total evaporation capacity, kg/H; W 1 ，W 2 ，… , wiped film evaporator ,jacketed glass reactor, W n — evaporation capacity of each effect, kg/H; of evaporator structures. When selecting the type of evaporator or designing the evaporator, on the premise of meeting the requirements of production tasks and ensuring product quality, it is also necessary to take into account the simple structure, easy manufacture, convenient operation and maintenance, good heat transfer effect and so on. In addition, it is also necessary to have good adaptability to the process characteristics of the material to be evaporated,wiped film evaporator, including the viscosity, heat sensitivity, corrosiveness of the material and whether it crystallizes or scales. The climbing film evaporator is suitable for evaporating low-boiling point alcohols or low-boiling point volatile organic compounds; The falling-film evaporator is suitable for the concentration of water-soluble substances and the evaporation of materials which are not easy to crystallize or scab; The horizontal falling film evaporator is suitable for the evaporation of volatile organic compounds with medium boiling points such as ethanol; The natural internal circulation evaporator is suitable for the concentration and evaporation of general materials; The forced external circulation evaporator is suitable for the evaporation and crystallization of high-concentration and easy-to-crystallize materials; The combination of falling film and forced external circulation evaporator is suitable for the concentration and crystallization of low-concentration and easy-to-crystallize materials; The combination of natural circulation and forced external circulation evaporator is suitable for the crystallization of the thickener of the medium and low concentration materials which are easy to crystallize; The combination of forced external circulation and multi-effect evaporation crystallization is suitable for secondary concentrated crystallization containing high-boiling inorganic or organic substances; Selection Criteria for Common Evaporation Equipment Return to Sohu to see more Responsible Editor:. toptiontech.com
Evaporator Classification Design Selection Information All you want is here _ Cycle
