STRUCTURE FOR DETECTING WATER LEVEL FOR BOILER WATER FEED CONTROL IN SHELL AND TUBE TYPE ONCE-THROUGH BOILER

摘要

PROBLEM TO BE SOLVED: To preclude a large difference from being generated, and to preclude synchronization of a behavior from being impaired, even under a specified condition between a water level of a steam separator and a water level in a water level detector communicated with the steam separator.;SOLUTION: A steam side connecting pipe 10 for communicating a steam side space 1S of the steam separator 1 with an upper space 2U of the water level detector 2, and a boiler water side connecting pipe 11 for communicating a boiler water side space 1W of the steam separator with a lower space 2L of the water level detector are provided between the steam separator and the water level detector to detect the water level in the steam separator 1 by the water level detector 2. A baffle plate 12 is installed in the boiler water side space 1W to restrain a vortex flow from being generated in boiler water. Disturbance is eliminated thereby in water feed control to a boiler main body via the steam separator, and water level detection performance is enhanced thereby to an extent requiring only a simple countermeasure even when correction control and an operation therefor are conducted.;COPYRIGHT: (C)2004,JPO