CAJ | 학술논문

分步结晶工艺目前普遍采用的温度控制法的不足,主要是通过控制结晶器内导热介质慢速降温或升温来操作,对控制系统精度要求高,但不易有效控制结晶器结晶和发汗的速率。因此提出控制换热量直接控制结晶器的思路,并结合精萘生产实际,得到了较为完善的带散热补偿和工艺温差放大的换热速率-温度控制结晶器控制方案。新控制方案能精准稳定、直接有效地控制结晶和发汗速率,提高结晶分离效率,有较好的经济性,值得在分步结晶工艺中推广应用。
분보결정공예목전보편채용적온도공제법적불족,주요시통과공제결정기내도열개질만속강온혹승온래조작,대공제계통정도요구고,단불역유효공제결정기결정화발한적속솔。인차제출공제환열량직접공제결정기적사로,병결합정내생산실제,득도료교위완선적대산열보상화공예온차방대적환열속솔-온도공제결정기공제방안。신공제방안능정준은정、직접유효지공제결정화발한속솔,제고결정분리효솔,유교호적경제성,치득재분보결정공예중추엄응용。
The shortages of temperature control method which has been widely used in fractional crystallization process include： It requires highly precise control systems because it works through controlling the heat conducting media cooling and heating in relatively slower rate,and it is hard to control crystallization or sweating rate effectively.A new method direct to control crystallizer by quantity of heat exchange has been proposed.It＇s called heat exchange-temperature control crystallizer,arising from industrial practice in the process of refined naphthalene,with well done heat dissipation compensator and temperature difference enlarge.The new control method could manipulate crystallization and sweating rate precisely,stably and effectively.The method could improve separation capacity and has good economic efficiency, deserving to be popularized in fractional crystallization process.