Chlorine removal agent, and method and application for removing chlorine from waste acid wastewater by using same
A technology of polluted acid wastewater and pharmaceuticals, which is applied in metallurgical wastewater treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., can solve the problems of consumption, high cost, and high operating cost, and achieve convenient use, low price, and easy The effect obtained
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[0031] Embodiment 1,
[0032] A method for dechlorination of polluted acid wastewater, comprising: removing H + 500 mL of polluted acid wastewater with a chlorine concentration of 2.5 mol / L and a chlorine concentration of 4200 mg / L was heated to 70 ° C in a container, 14.1 g of sodium peroxodisulfate was added, and the reaction was conducted at 70 ° C under magnetic stirring for 1 hour. The chloride ion concentration of the polluted acid wastewater was determined by titration to be 19.5 mg / L, and the removal rate of chloride ions was 99.5%. + The concentration is 2.4mol / L, and the chlorine gas generated in the reaction process is passed into the storage tank containing 100g / L sodium hydroxide solution through the pipeline on the container for absorption, and the sodium hypochlorite product is obtained.
Example Embodiment
[0033] Embodiment 2,
[0034] A method for dechlorination of polluted acid wastewater, comprising: removing H + 1000 mL of polluted acid wastewater with a chlorine concentration of 2.0 mol / L and a chlorine concentration of 2200 mg / L was heated to 80 °C in a container, 12.9 g of peroxodisulfuric acid was added, and the reaction was conducted at 80 °C under magnetic stirring for 4 hours. The chloride ion concentration of the acid wastewater was determined to be 20.0 mg / L by titration, and the chloride ion removal rate was 99.1%. + The concentration is 2.2mol / L, and impurity ions such as sodium, potassium and ammonium root are not introduced in the reaction. The chlorine gas generated during the reaction is passed into the storage tank containing 150g / L sodium hydroxide solution through the pipeline on the container for absorption. , to obtain sodium hypochlorite products.
Example Embodiment
[0035] Embodiment 3,
[0036] A method for dechlorination of polluted acid wastewater, comprising: removing H +2000mL of polluted acid wastewater with a chlorine concentration of 8.3mol / L and a chlorine concentration of 12000mg / L was heated to 90°C in a container, 160.9g of peroxodisulfuric acid was added, and the reaction was conducted at 90°C under magnetic stirring for 8 hours. The chloride ion concentration of the acid wastewater was determined by titration method to be 19.8 mg / L, and the removal rate of chloride ions was 99.8%. + The concentration is 8.1mol / L, and no impurity ions such as sodium, potassium and ammonium are introduced in the reaction. The chlorine gas generated during the reaction is passed into the storage tank containing 300g / L sodium hydroxide solution through the pipeline on the container for absorption. , to obtain sodium hypochlorite products.
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