公开(公告)号：US06513462B1

公开(公告)日：2003-02-04

申请号：US09937600

申请日：2001-09-28

申请人： Tadashi Shiraishi ,  Takehiko Ichioka ,  Hideya Okada ,  Fumitoshi Nakao ,  Toshiyuki Kinugasa

发明人： Tadashi Shiraishi ,  Takehiko Ichioka ,  Hideya Okada ,  Fumitoshi Nakao ,  Toshiyuki Kinugasa

IPC分类号： F22B3754

CPC分类号： B08B3/102 ,  F22B37/483 ,  F28G1/166 ,  F28G13/00

摘要： A scale removing device for removes scale adhering to the interior of a shell-and-tube-heat-exchanger-type steam generator. The scale removing device is provided with a flexible lance (58) holding a high-pressure water hose (91) movable with respect to a tube plate, tube support plates, and heat-transfer tubes. A cleaning head (60) is mounted to the forward end of the flexible lance. Formed inside the cleaning head is a cavitation generating nozzle hole (99a, 99b) communicating with the high-pressure water hose. Bubbles are generated at the time of cleaning, and the impact pressure generated when the bubbles collapse is propagated to remove scale over a wide range.

摘要翻译： 一种除垢装置，用于去除附着在壳管式热交换器型蒸汽发生器内部的垢。 除垢装置设置有柔性喷枪（58），其保持相对于管板，管支撑板和传热管可移动的高压水软管（91）。 清洁头（60）安装到柔性喷枪的前端。 在清洁头内部形成有与高压水软管连通的气蚀产生喷嘴孔（99a，99b）。 在清洁时产生气泡，并且当气泡破裂时产生的冲击压力被传播以在宽范围内移除氧化皮。