| 摘要 |
An apparatus for continuously cleaning tubular heat exchangers during use is disclosed, including a separator for continuously circulating cleaning bodies through the heat exchanger along with the heat transfer-medium being employed. The separator thus recirculates the cleaning bodies along with fresh heat transfer medium while separating out a major portion of the heat-transfer medium withdrawn from the tubular heat exchanger, and includes means for withdrawing the cleaning bodies from a downstream portion of the separator and means for withdrawing the heat-transfer medium withdrawn from the heat exchanger from an upstream portion of the separator. The separator is preferably vertically disposed, so that the cleaning bodies are aided by gravity in reaching the downstream portion of the separator, and the cleaning bodies therefore do not impinge upon any screen for separating them from the heat-transfer medium. Baffle means are also provided in the upstream portion of the separator to assure low uniform velocity distribution of the heat transfer medium, and a check valve is provided in the downstream portion of the separator to prevent reversal of the flow of heat-transfer medium at the outlet port of the separator. In addition, means are also provided for maintaining a closed loop including the cleaning bodies free from pumps, including a Venturi disposed at the downstream portion of the separator, and where pumps are employed in the closed loop, a time demand or flow demand circuit for deactivation of the pumps at regular time intervals or at conditions of low demand is provided.
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