| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-reliable dust iodine monitor capable of easily adjusting the flow rate without changing the balance of pressure loss when switching over.SOLUTION: The dust iodine monitor includes an iodine flow rate adjustment line 4 which branches from a main flow path 10 at the upstream side of an iodine collection part 23 and an iodine bypass line 3, and which allows a large part of a sample gas exhausted from a dust collection part 12 and allows a part of which to flow into the iodine collection part 23 or the iodine bypass line 3. A dust flow rate adjuster valve 132 adjusts the flow rate through a dust monitor 1 to a rated flow rate A, the iodine flow rate adjuster valve 41 adjusts the flow rate through an iodine monitor 2 to a rated flow rate B, and an iodine bypass flow rate adjuster valve 32 adjusts the opening degree of the valve so as to be equal to the pressure loss which is generated when the rated flow rate B flows through the iodine monitor 2. With this, fluctuation of the flow rate through the dust monitor 1 is suppressed when the flow is switched between the iodine bypass line 3 and the iodine monitor 2. |
