Research On Microbial Control Of Circulating Cooling Water

Circulating cooling water is the water consumption of electric power, chemical industry, iron and steel parts in industrial process. In the running process of the system, the control equipment corrosion and scaling method to reduce the water damage to the equipment, reduce the water loss, is the main means of saving energy, tapping the potential synergies. The concentration ratio of circulating water treatment had no more than 2.5, water supply, drainage volume is very large, is now using organic corrosion inhibitor, scale inhibitor, bactericide and algicide and other means, with the comprehensive process of circulating water can be increased to 5-8. More water consumption in thermal power plant is the circulating cooling water system, the running process of the system of stroke blowing loss accounted for the main part, the sewage is also a great loss accounted for the proportion of other systems, including leakage, side stream filtration back washing drainage device. In order to reduce the loss of this part, the main way is to improve the technology of the concentration ratio of circulating cooling water system, reduce the sewage water, and the amount of supplementary water. As the circulating water of circulating water system in microbes thrive will produce slime at the heat transfer surface and the inner surface of the pipeline, cooling tower filler surface and other parts to produce bio sediment. Effects of circulating cooling water corrosion is mainly related to the microbial activities, microbial growth, reproduction process will produce a slime, will produce electrochemical corrosion, will produce the dirt, if not for the water treatment, and control these risks, will produce scale, serious corrosion problems, affect the safe and economic operation of power plant equipment.The circulating cooling water system of thermal power plant by impact Daqing Petrochemical Co joint control of heterotrophic bacteria dosing chlorine dioxide,1227, GSP-222 mode, which is mainly due to chlorine dioxide disinfectant, the impact of adding mode can’t realize the continuous release of fungicides, can not be effectively controlled, the heterotrophic bacteria often exceed the standard content, increase the heat load, equipment corrosion, seriously affect the safe operation system, to increase the amount of adding reagents, high operating costs. Aiming at these problems, from the study of circulating cooling water system of the microorganism itself survival and reproductive characteristics, existing chemicals ratio situation, research, how to microorganism in circulating water system, effective economic control, to achieve a reliable, economic operation.