| 摘要 |
PURPOSE: A shroud nozzle for sampling particle and gas samples and a nozzle fixing device are provided to prevent a change in a position of the shroud nozzle installed inside a duct and a stack in the operation of a system caused by external factors such as vibration. CONSTITUTION: A shroud nozzle for sampling particle comprises a cylindrical nozzle(5), a nozzle inlet(6), and a shroud(7). The cylindrical nozzle collects particles and gas samples. The nozzle inlet is extended to the front end of the nozzle and has a central shaft identical to the nozzle. The nozzle is formed is tapered so that inner diameter gradually becomes smaller to the front and thickness becomes thinner. The shroud is arranged outside the nozzle inlet by being spaced from the nozzle at a predetermined space and has a central shaft identical to the nozzle and the nozzle unit. A radius of the shroud gradually becomes larger to the front. |
