China is an uneven distribution of resources cross country. In recent years the development of the western region found a large number of western coalfield. Coal industry with the development of the traditional wet coal preparation of the water requirements of the large and does not meet Western Coal production requirements. Moreover, the traditional method of stem pollution. In the last century, China started on the heavy air-fluidized bed coal preparation technology, has made great achievements. The latest development of air heavy medium fluidized bed coal separation technology were discussed. The high efficient coal dry separation of whole size range is expected to come into application and the application will promote the further development of the coal separation undertaking and the coal cleaning technology.
The significance and present situation of clean coal technology were discussed. Characteristics of different dry coal beneficiation methods and advantages of air dense medium fluidized bed were introduced in paper. The air dense_medium fluidized bed technique is of high precision, low investment, wide range of density, and no environment pollution. I designed primarily designed for use exclusively Coal scraper conveyor, the grid plate, vibration device. On the base of previous air dense_medium fluidized bed separator, some renovation is done to solve the problem in use. In order to solve the unequality of the wind when it goes through the wind through board, the design gives a new board which is oscillated. The paper also designs an equipment for the excluding of the refuse, which can let the refuse out of the separator in set quality. I constructive the working principle, structure design and major parameters design process of linear vibrating screen, in this paper.
Keywords：clean coal; air dense_medium; fluidized bed
