Composition and content of mercury-containing wastewater after VCM conversion
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Composition and content of mercury-containing wastewater after VCM conversion
The mercury-containing wastewater resulting from VCM conversion consists of three main components: acid washing wastewater, alkali washing wastewater, and gutter wastewater. Components and concentrations: Treatment of mercury-containing wastewater – Acidic wastewater from washing processes, pH: <1； HgCl: 2–3 ppm, at a flow rate of 1.5 m3/h in the neutralization tank; alkaline washing of alkaline wastewater, pH: >14 ； NaOH＞5% ； 8% ≥ Na2CO3 ≥ 3%, intermittent flow of 4.5 m3/h; the treatment capacity of the mercury-containing wastewater unit is 5 tons per hour. Annual operating hours of the wastewater treatment plant: 8,000 hours ； After treatment in the mercury-containing wastewater unit, the total mercury concentration in the water is ≤0.005 mg/l. The pH is 6 to 9.