发明名称 |
METHOD AND APPARATUS FOR PROVIDING OSCILLATING CONTAMINANT-REMOVAL STREAM |
摘要 |
<p>12 51,798 For removal of the contaminant deposits from a surface such as a tube sheet of a vertical tube heat exchanger, as in a nuclear steam generator, having plural spaced heat exchange tubes connected to the tube sheet, a lance is radially moved along the tube sheet between parallel rows of tubes. The lance carries a nozzle for ejecting a stream of high pressure cleaning fluid toward the sludge deposits, the nozzle acting cyclically to sweep the stream throughout a range of directions centered about the nozzle axis. The nozzle may include diverting streams for deflecting the cleaning fluid stream, with the diverting streams either being generated by a fluidic oscillator or being fed back from the outlet portion of the nozzle. Alternatively, pivoting vane means may be provided in the nozzle to divert the cleaning fluid stream.</p> |
申请公布号 |
CA1245114(A) |
申请公布日期 |
1988.11.22 |
申请号 |
CA19850485256 |
申请日期 |
1985.06.26 |
申请人 |
WESTINGHOUSE ELECTRIC CORPORATION |
发明人 |
AYERS, DAVID L.;WRIGHT, TERRY;SKRIBA, MICHAEL C. |
分类号 |
G21F9/28;B08B9/032;F22B37/48;F28G1/16;G21F9/00;(IPC1-7):F22B37/48 |
主分类号 |
G21F9/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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