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2. 发明专利

JPH02154904A DESUPERHEATER 失效
公开(公告)号：JPH02154904A
公开(公告)日：1990-06-14
申请号：JP30702488
申请日：1988-12-06
申请人： BABCOCK HITACHI KK
发明人： MATSUDA JUNICHIRO , FUNAKURA MASANORI
IPC分类号： F22D5/12 , F22G5/12
摘要： PURPOSE:To lessen the temperature difference between the inner face and outer face of a nozzle to reduce the generation of thermal stress by providing steam bypass piping for bypassing low temperature steam in cooling water piping from steam piping to cool a spray nozzle by the low temperature steam. CONSTITUTION:The low temperature steam of steam piping 16 is superheated in a superheater 5 to allow it to flow in a desuperheater 13. In order to control the steam temperature of outlet steam piping 20 in the desuperheater 13, the cooling water of cooling water piping 15 is injected from a spray nozzle 17 through a three-way valve 19. Next, in the case where the cooling water is not needed, the side of the cooling water piping 15 of the three-way valve 19 is closed, reversely, the side of the steam bypass piping 18 is opened and the low temperature steam of the steam piping 16 is allowed to flow in the spray nozzle 17 through the piping 18. Thereby, the temperature difference between the inner face and outer face of the spray nozzle 17 is lessened to lower thermal stress by the temperature difference.

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