多级间歇分步结晶过程的研究

The Study on Multistage Batch Fractional Crystallization

对间歇参数泵分步结晶过程进行了研究,此过程由结晶、发汗和熔化三步组成.研究表明,影响该过程的主要参数有鼓气速率、结晶降温速率、结晶时间、发汗升温速率及发汗时间等.在管长2m,内径50mm的结晶管内对萘-硫茚混合物进行了结晶发汗实验,取得上述因素对参数泵结晶过程的影响规律.

The process of batch fractional crystallization was studied. It was found that the process of parametric pumping fractional crystallization is composed of three parts: crystallization, sweating and melting. The main affecting parameters are bubbling velocity, temperature reducing and rising program and sweating time, etc. Experiments of crystallization and sweating of the mixture of naphthalene and thionaphthene were carried out in a crystallization tube. The effects of various parameters on this process were detected.