Evaluation of drift and salt deposition from a natural draft seawater cooling tower. Part II: Field monitoring
DESALINATION AND WATER TREATMENT(2018)
摘要
In the present paper, environmental impact of drift and salt deposition from an oversize hyperbolic natural draft seawater cooling tower in a power plant was conducted by field monitoring. This seawater cooling tower was in a closed-cycle cooling system which has high salt concentration about 1.5-2.0 times original sea water salinity. Considering the impact of regional scope, suitable field monitoring positions with wet deposition field monitoring method was set according to early SACTI analytical research results. 3-D salt deposition contour map of four seasons was drawn according to monitoring results. In most area of the plant, salt deposition flux is more than 1 g/(m(2) month), where most plant leaves in growing period will hurt, and the maximum salt deposition flux is more than 14.71 g/(m(2) month) forming potential environmental hazards. Necessary measures should be taken such as changing efficient eliminator or reducing salt concentration of circulating seawater. Therefore, a drift salt deposition analysis before design is necessary for choosing a suitable eliminator to meet environmental requirement.
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关键词
Seawater cooling tower,Closed-cycle cooling,Salt deposition,Field monitoring,Wet deposition
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