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A platform for research: civil engineering, architecture and urbanism
Assessment of three technologies for the treatment of cooling tower blowdown
The report gives results of analyses of three methods for treating cooling tower blowdown: vapor compression evaporation (VCE), reverse osmosis (RO), and vertical tube foaming evaporation (VTFE). The two evaporative processes produce pure water (approximately 10 ppm dissolved solids). RO produces water of lower purity (about 500 ppm) but adequate for many uses in the power plant or for return to the cooling tower. VCE has been used successfully in commercial power plants; the evaporative processes have no plants in operation on cooling tower blowdown. Plant investment is strongly influenced by the cost of lined ponds required to evaporate the treatment plant blowdown and store the residual salts. Consequently, the RO plant investment is almost in the range of that of VTFE and VCE plants. In total capital plus operating costs, VTFE has a distinct advantage over RO and VCE because its source of energy is waste heat to which a zero value has been assigned. The VTFE economics is based on vertical tube evaporator experience (without adding surfactant). If field pilot tests substantiate previous laboratory results, the economics of the VTFE may prove to be even more favorable. (DePo)
Assessment of three technologies for the treatment of cooling tower blowdown
The report gives results of analyses of three methods for treating cooling tower blowdown: vapor compression evaporation (VCE), reverse osmosis (RO), and vertical tube foaming evaporation (VTFE). The two evaporative processes produce pure water (approximately 10 ppm dissolved solids). RO produces water of lower purity (about 500 ppm) but adequate for many uses in the power plant or for return to the cooling tower. VCE has been used successfully in commercial power plants; the evaporative processes have no plants in operation on cooling tower blowdown. Plant investment is strongly influenced by the cost of lined ponds required to evaporate the treatment plant blowdown and store the residual salts. Consequently, the RO plant investment is almost in the range of that of VTFE and VCE plants. In total capital plus operating costs, VTFE has a distinct advantage over RO and VCE because its source of energy is waste heat to which a zero value has been assigned. The VTFE economics is based on vertical tube evaporator experience (without adding surfactant). If field pilot tests substantiate previous laboratory results, the economics of the VTFE may prove to be even more favorable. (DePo)
Assessment of three technologies for the treatment of cooling tower blowdown
Bewertung von drei Technologien fuer das Ausblasen von Kraftwerk-Kuehltuermen
Mast, V.C.der (author) / May, S.C. (author) / Houle, E.H. (author) / Rogers, A.N. (author) / Weekes, M.C. (author)
US Government Reports ; 1-89
1979
89 Seiten
Report
English
| Tema Archive | 1974
| Tema Archive | 1974
Silica stabilization helps reduce cooling-tower blowdown
| Tema Archive | 1989