Acidic wastewater treatment equipment and treatment method
A technology for wastewater treatment and treatment equipment, applied in metallurgical wastewater treatment, multi-stage water treatment, water/sewage treatment, etc., can solve problems such as poor environmental protection, achieve the effect of reducing production and increasing additional economic value
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Embodiment 1
[0054] use as figure 2 The acid-containing wastewater treatment equipment shown will be 150m 3 After the acid-containing wastewater containing 5wt% sulfuric acid is contacted with flue gas at 50°C for concentration, 30m 3 Concentrate; after adding polyferric chloride (flocculant) to the above concentrate, centrifuge to obtain 29.5m 3 The filtrate and 0.05t of solid residue, the concentration of sulfuric acid in the filtrate is 25wt%; after the above filtrate is contacted with air at 400 ° C, the defluorination and dechlorination process is carried out at 90 ° C in a vacuum environment to obtain acid gas containing hydrogen fluoride and hydrogen chloride and 12.9t of sulfuric acid with a mass fraction of 60wt%, using sodium hydroxide solution to absorb the above-mentioned acid gas.
Embodiment 2
[0056] use as figure 2 The acid-containing wastewater treatment equipment shown will be 150m 3 After the acid-containing wastewater containing 5wt% sulfuric acid is contacted with flue gas at 400°C for concentration, 30m 3 Concentrate; after adding polyferric chloride (flocculant) to the above concentrate, centrifuge to obtain 29.5m 3 The filtrate and 0.05t of solid residue, the concentration of sulfuric acid in the filtrate is 25wt%; after the above-mentioned filtrate is contacted with air at 100°C, the defluorination and dechlorination process is carried out at 60°C to obtain acid gas containing hydrogen fluoride and hydrogen chloride and 15.5t of mass Sulfuric acid with a fraction of 50 wt%, using sodium hydroxide solution to absorb the above-mentioned acid gas.
Embodiment 3
[0058] use as figure 2 The acid-containing wastewater treatment equipment shown will be 150m 3 Containing 5wt% sulfuric acid and contacting flue gas at 400°C for concentration, 30m 3 Concentrate; after adding polyferric chloride (flocculant) to the above concentrate, centrifuge to obtain 29.5m 3 The filtrate and 0.05t of solid residue, the concentration of sulfuric acid in the filtrate is 25wt%; the above-mentioned filtrate is contacted with air at 60°C and defluorinated and dechlorinated at 50°C to obtain acid gas containing hydrogen fluoride and hydrogen chloride and a mass fraction of 19.3t For 40wt% sulfuric acid, use sodium hydroxide solution to absorb the above acid gas.
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