Abstract:

As a green and efficient separation technology, melt crystallization has the advantages of high selectivity, low energy consumption, and no need for solvents. However, it remains several challenges in theoretical research on crystallization, continuous production, specific targeted crystallizer design and industrial scale-up. Moreover, its separation efficiency is limited by the nature of the system, the purity of raw material and crystal growth rate. Therefore, a reasonable design and process optimization for melt crystallization is of great significance to improve its energy and process efficiency. Based on the actual demand and applying prospects of melt crystallization technology, the intensification methods of crystal nucleation and growth during melt crystallization include three aspects that are: process optimization, surface design of crystal layer growth and coupling technique, which providing the feasible guidance to realize higher efficiency and lower energy consumption. Finally, the critical concerns of melt crystallization are outlined and the development directions are prospected.

Key words: separation, crystallization, nucleation, heat transfer, optimization

摘要：

熔融结晶作为一种绿色高效的分离技术具有选择性高、能量消耗低、无须溶剂参与等优势，但在结晶理论研究、连续化生产、专用结晶器设计和工业放大等方面仍面临挑战。熔融结晶分离效率受物系性质、原料纯度和晶体生长速率限制。因此，熔融结晶过程的合理设计和过程优化对提高熔融结晶技术的能量和过程效率具有重要意义。基于熔融结晶技术在化工分离过程中的实际需求和应用前景，从熔融结晶过程工艺优化、晶体层生长表面设计、过程工艺耦合三方面论述熔融结晶过程中晶体成核、生长的强化方式，为达到高效率、低能耗的熔融结晶分离过程提供可行性指导。最后，概述了目前熔融结晶技术的主要研究焦点并对发展方向进行了展望。

关键词: 分离, 结晶, 成核, 传热, 优化