| 摘要 |
<p>A method of cleaning a steam generator having spaced upwardly and downwardly spaced pipe bundles in a casing, which includes introducing through two accesses into a space between the pipe bundle portions an elongate, rigid, rotatable high pressure lance having at least one pair of radially directed spray openings for fluid jets, introducing through each access a suction line provided with a suction opening adjacent the bottom, shifting the lances with the spray head directed between the rows of pipes of the pipe bundle portions, oscillating the lances, spraying a cleaning liquid through the spray heads under a pressure higher than 200 bars and with a mean flow rate for both spray heads together of more than 200 liters per minute and sucking the sprayed liquid away from the bottom through the suction lines during the cleaning with a -total suction capacity which is markedly higher than the mean flow rate of the spray heads together.</p> |
