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采用光纤测量方法,在不同的操作条件下,对一套中心气升式气-固环流反应器冷模装置内4个区域中不同轴向、径向位置的局部床层密度进行测量,得到沿轴向、径向局部床层密度分布的规律。结果表明,在导流筒区,沿轴向高度h=512~1 112 mm内,各截面平均床层密度分布比较均匀;在环隙区,由于颗粒夹带气泡量的不同,沿轴向不同截面平均床层密度降低的大小程度不同;局部床层密度在环隙区沿径向分布比较均匀,而在其它区域(导流筒区、底部分布器影响区和气-固分离区)呈中心区大边壁区小的不均匀分布形态。
Using optical fiber measurement method, under different operating conditions, the local bed density in different axial and radial positions in four regions of a set of central gas-solid loop flow reactor cold model device was measured. Axial and radial distribution of local bed density. The results show that the distribution of average bed density in each cross section is uniform along the axial height h = 512-1 112 mm in the draft tube area. Due to the difference of entrained air bubbles in the annular zone, The average bed density decreased in different degrees. The distribution of local bed density in the annular zone was more uniform in the radial direction, while in the other areas (diversion barrel zone, bottom distributor influence zone and gas-solid separation zone) Small uneven wall area distribution.