关键词: 浆态床, 错流过滤, 梯级过滤管, 压力降, 液体流速, 过滤时间

Abstract: The slurry bed reactor is one of the most important equipment in the coal indirect liquefaction process. In order to make the reactor operate safely for a long time, it is necessary to continuously and effectively separate the synthetic oil in the reactor from the solid liquid two phases, and dynamic cross flow filtration can achieve this goal. According to the basic principle of solid liquid separation cross flow and the characteristics of filter cake, a new type of dynamic cross flow filtration technology is proposed. The simulation experiments has been completed, and the results show that the flow rate of the liquid outside the filter tube can be controlled by the internal components, and a two phase filtration can be formed to ensure the uniform flow field outside the filter surface. Therefore, the filter cake can be dynamically uniform and the filtration effect is improved. Through the simulation research and theoretical analysis results, it is believed that the use of stepped metal powder sintered filter tubes and dynamic cross flow filtration technology in the slurry bed F-T synthesis reactor can achieve continuous and effective separation of synthetic oil and catalytic slurry.

Key words: slurry bed reactor, cross flow filtration, step filter tube, pressure drop, liquid flow rate, filter time