Method for zero discharge of waste water from power plant

• Main Authors: HUI JUN, LIU SIMING, ZHANG XUEHONG, ZHANG DAQING, YAN XIUQIN
• Format: Patent
• Language: Chinese; English
• Published: 19.04.2019
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to a method for zero discharge of waste water from a power plant, which comprises the following steps of: (1) filtering desulphurization waste water through a vacuum belt filterpress, collecting filtering fluid I, washing a filter cloth, and introducing into a sedimentation tank; filtering effluent of the sedimentation tank through a plate-frame filter press for a second time, collecting filtering fluid II, and introducing into a cooling tower system to mix with water of the Yellow River and reverse osmosis concentrated water to form circulating water; (2) regulating pHof the circulating water to be 7.0-7.5, adding a zero discharge regulator to make chloride precipitate by flocculation and precipitate calcium and magnesium ions; (3) adding a special high efficient corrosion inhibitor to the circulating water treated by step (2); (4) adding fungicide to the circulating water treated by step (3); and (5) carrying out trial operation of the circulating water cooling tower after the treatmen