FIELD: the invention refers to heat-and-power engineering particularly to the mode of cleansing inner surfaces of heat exchangers from scale deposit.
SUBSTANCE: the mode includes dilution of acid-forming gas in water by way of water-gas ejection, creation of overpressure with the aid of gas of water solution until magnitude higher then hydrostatic resistance of heat exchanger and throwing down this pressure. After ejection of formed water-gas dispersion additional rotationally-whirling motion is given, then overpressure is dropped at least once until forming of cavitational bubbles then it is once more raised until its initial meaning. At that acidation of water solution is made.
EFFECT: provides reduction of harmful impacting of acids on environment, excludes possible stopping of tubes with flinders of scale sediment due to complete dispersion of scale.
6 cl, 2 dwg
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|---|---|---|---|
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