| 摘要 |
A method and apparatus for cleaning a heat exchanger during operation thereof. The heat exchanger includes a plurality of tubes through which a first fluid is conducted from an inlet end to an outlet end in indirect heat transfer relationship with a second fluid disposed on the outside of the tubes intermediate the inlet and outlet ends of the tubes. Further, the heat exchanger includes an inlet chamber for the first fluid communicating with the inlet ends of the tubes, and a tube sheet for supporting the inlet ends of the tubes and isolating the inlet chamber from the second fluid, the inlet ends of the tubes extending into the inlet chamber beyond the tube sheet. The method of cleaning comprises introducing a particulate cleaning media between the inlet ends of the tubes and the tube sheet, and then forcing the introduced particulate cleaning media in a direction counter to the direction of flow of the first fluid through the tubes along the exterior surfaces of the tubes to the inlet ends of the tubes so that the particulate cleaning media is introduced into the tubes and is directed against the inner walls thereof as the flow of particulate cleaning media is changed so that it flows through the tubes in the direction of the flow of the first fluid. Apparatus is also disclosed for cleaning of a heat exchanger in accordance with this method.
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