中文摘要：

建筑垃圾中轻物质的分离，是建筑垃圾骨料再生质量的关键技术。基于风选原理，设计了一种能实现建筑垃圾中轻重物质分离的新型风选装备，并利用FLUENT对风选装备风选室的性能进行仿真分析。通过样机风选实验，对仿真结果进行了验证，确定了该结构的合理性。仿真和实验结果均表明，该样机轻重物质分离关键区域的垂直速度约为17m·s^-1，其垂直速度小于混凝土的悬浮速度约为26m·s^-1；大于废弃木材等轻物质的悬浮速度约为12m·s^-1，可实现轻重物质的分离，初步达到了设计要求。轻重物质的分离技术属于常见的资源回收技术，对相关风选装备的设计与开发具有一定的借鉴意义。

英文摘要：

The separation of light materials from the heavy materials present in construction waste is a key technology for regenerating high-class construction waste aggregates. Firstly, based on the principle of winnowing, a new type of winnowing equipment was designed to separate the light and heavy substances found in construction waste. FLUENT was used to simulate the performance of winnowing space with the winnowing equipment. The simulation results were verified by winnowing equipment prototype tests, so as to verify the applicability of its structure. The results of the simulation and test showed that the vertical velocity of the separation critical areas of the light and heavy substances was about 17 m·s^-1. The suspension velocity of concrete was about 26 m ·s^-1 which was more than the vertical velocity, and the suspension velocity of waste wood and other light substance was about 12 m ·s^-1 which was less than the vertical velocity. These results showed that the prototype had achieved its design goals of being able to separate the light and heavy substances from each other. The technology uses recyclable methods and has reference significance for the design and development of the winnowing equip- ment.