Device and process for treating silica-containing high-salt wastewater in silica acid precipitation process
A silicon dioxide and treatment device technology, which is applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., and can solve the problems of large amount of solid waste and high operating cost.
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[0076] This implementation provides a SiO 2 Treatment equipment for high-salt wastewater containing silica in acid precipitation process, such as figure 1 As shown, the treatment device includes a pretreatment unit, a preconcentration unit, a double-effect evaporation unit, an MVR evaporation crystallization unit and a drying unit, and each unit is connected in sequence;
[0077] The pretreatment unit includes a settling tank 2 for preliminary separation and recovery of silica in waste water;
[0078] The pre-concentration unit includes an evaporative cooling 3, which is used for partial evaporation of water in the wastewater to achieve preliminary pre-concentration, and the evaporative cooling has a low drift loss, <56kg / h;
[0079] The two-effect evaporating unit comprises a first-effect separator 4, a first-effect heater 5, a second-effect separator 6, a second-effect heater 7 and a filter press 8; There is no energy-consuming equipment in the delivery process of the effi...
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