用于流化床石棉发生器的可变进料速率机构。

A variable feed rate mechanism for fluidized bed asbestos generators.

作者信息

Sussman R G, Gearhart J M, Lippmann M

出版信息

Am Ind Hyg Assoc J. 1985 Jan;46(1):24-7. doi: 10.1080/15298668591394329.

Abstract

A simple and inexpensive dust feed mechanism has been designed for use with a two-phase fluidized bed generator (FBG). The mechanism is especially useful for generating asbestos aerosols, but may be used with other dusts as well. Using this system, a steady state concentration (39.1 fibers/cc greater than 5 microns in length +/- 6.2%) of asbestos aerosol was maintained in an inhalation chamber for five hours. In addition, FBG output concentration was easily adjusted and quickly equilibrated (within 10 minutes). The system provides a good technique for generating asbestos aerosols for day-long animal exposures.

摘要

已设计出一种简单且成本低廉的粉尘进料装置，用于两相流化床发生器（FBG）。该装置特别适用于生成石棉气溶胶，但也可用于其他粉尘。使用此系统，在吸入室内可维持五个小时的稳态石棉气溶胶浓度（长度大于5微米的纤维浓度为39.1根/立方厘米，正负6.2%）。此外，FBG的输出浓度易于调节且能快速达到平衡（10分钟内）。该系统为生成用于动物长时间暴露实验的石棉气溶胶提供了一种良好的技术手段。