| 摘要 |
PROBLEM TO BE SOLVED: To provide a boiler system capable of suppressing frequent switching of a flow passage in a drain relief line, and capable of being stably operated.SOLUTION: A boiler system 1 includes a boiler 10, a drain tank 20, a drain recovery line L2, a drain recovery valve 23 arranged in the drain recovery line L2, an open tank 30, a drain relief line L8 connecting the upstream side of the drain recovery valve 23 in the drain recovery line L2 with the open tank 30, a drain relief valve 81, a water level measuring section 25 for measuring a water level in the drain tank 20, a storage section 120 for storing a target water level and a drain relief water level, a first water level control section 111 for controlling an opening of the drain relief valve 81 so that the water level in the drain tank 20 becomes the target water level, and a second water level control section 112 for closing the drain recovery valve 23 and opening the drain relief valve 81 when the water level in the drain tank 20 exceeds the drain relief water level.SELECTED DRAWING: Figure 1 |
