Abstract
A sponge ball cleaning method has been developed as the technology of scale prevention for the condenser cooling tubes of a thermal power plant.
A multi-stage flash type evaporator is made up of many condensers. Therefore, the authors originally thought of the application of sponge ball cleaning method to scale prevention for the condensers of the multi-stage flash type evaporator.
In this paper, the authors have made a study for not only pointing out technical problems in the application of sponge ball cleaning method to the multi-stage flash type evaporator but making clear its scale prevention effect as well. As the result of this study, the authors have come to the following conclusions: (1) The sponge ball cleaning method is very effective on scale prevention for the condensers of the multi-stage flash type evaporator.(2) The thermal loss resulting from the extraction of hot brine as a ball carrier can be reduced to a negligible degree by making optimum the extraction quantity of the brine.(3) To make the sponge ball cleaning method effective on scale prevention in the multi-stage flash type evaporator, the sponge ball recycling system should be divided into the following two routes; one is the high temperature zone route and the other one is the low temperature zone route.
