介尺度视角下干法重介流态化分选过程强化

Intensification of dry dense medium fluidization separation process from a mesoscale perspective

煤炭在保障我国能源安全中具有重要作用。干法重介流态化分选是煤炭分选加工领域的重要组成部分,有助于推动我国煤炭资源的高效洁净利用。流态化分选密度的稳定调控是实现高效分选的必要条件,调控的核心是如何削弱气泡扰动作用,关键是理解流态化分选过程中介尺度结构的演变及调控机制。从介尺度视角分析了气固流态化干法分选调控过程的关键科学问题,梳理了单元干法分选设备以及系统放大过程中介尺度结构的研究进展,分析了介尺度结构的演变规律,提出了介尺度结构的精准调控策略,对干法流态化的工业推广应用及煤炭的分选提质具有重要意义。

Coal plays an important role in providing the basic energy security.Dry heavy-medium fluidized separation is an important part of coal separation and processing,which helps to promote the efficient and clean utilization of coal resources in China.Reliable separation is mainly based on the accurate density control in the separation process.And the core of density control is related to weakening the bubble evolution in the bed.It is comparably important to understand the tendency of bubble evolution and the principle of bubble dispersal.The research proposed the key scientific problems in dry fluidization separation process from mesoscale perspective.Furthermore,the research progress has been collected on the evolution of mesoscale structure on the view of lab system and scale-up of dry fluidization separation system.The mentioned research provided the detailed explanations on evolution of mesoscale structure.Meanwhile,the relevant methods have been put forward on the accurate regulation of mesoscale structure.It is also of great significance to the sorting and quality improvement of coal.