| 摘要 |
<p>For cleaning at least one of the sides of the essentially vertical heat-transmitting walls (4) between two fluids in a heat exchanger (1), solid particles are introduced into a stream (14) of fluid, which particles are smaller than the distance between opposite walls defining the flow of fluid, said fluid with particles being introduced (by 16) into part of a collection or distribution space (11) above said walls (4) and said particles being collected below said vertical walls and discharged from the heat exchanger. The particles are so heavy that they move downwards in the fluid even if this has an upward direction of flow between the walls. The particles are introduced above only part of the transverse plane above the vertical walls (4) and switch means (15) allow switching of said introduction to other parts of said transverse plane periodically. Thereby, the normal operation of the heat exchanger can continue with hardly any pressure loss during cleaning. <IMAGE></p> |
