Electroplate chromate waste water treatment system and method
A treatment system, chromium wastewater treatment technology, applied in the direction of metallurgical wastewater treatment, water/sewage treatment, water treatment parameter control, etc., can solve the problems of large dosage of chemicals, poor stability of chemical reduction method, high operating cost, etc., to reduce investment The effect of increasing the dosage and reducing the effect is better, and the cost of the medicine is saved
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Embodiment 1
[0023] Example 1, such as figure 1 The shown a kind of electroplating chromium-containing wastewater treatment system includes regulating tank 1, acidizing tank 2, electroflocculation reduction device 3, neutralization tank 4, flocculation tank 5, buffer tank 6, separation tank 7 connected in sequence through pipelines, A sludge hopper 10 is set in the buffer tank 6, a filter device 8 is set in the separation tank 7, and a stirring and mixing device 9 is respectively set in the adjustment tank 1, the acidification tank 2, the neutralization tank 4, the flocculation tank 5, and the buffer tank 6. The electrocoagulation reduction device 3 is equipped with an automatic inverted high-voltage pulse power supply and iron electrode plates. It also includes a sludge return pipeline connecting the separation tank 7 and the flocculation tank 5, and a sludge return pump 12 is arranged on the sludge return pipeline. An on-line pH control device 11 compatible with the acidification tank 2...
Embodiment 2
[0024] Example 2, such as figure 1 A kind of electroplating chromium-containing wastewater treatment method, comprises the steps:
[0025] Step (1) Regulating water quality: first discharge the chromium-containing wastewater produced in the electroplating workshop into the regulating pool 1, and fully adjust the water quality and quantity through the stirring and mixing device 9;
[0026] Step (2) Acidification: Send the waste water regulated in step (1) into the acidification pool 2 through the lift pump 14; automatically add sulfuric acid to the acidification pool 2 through the online pH control device 11 to control the pH value in the acidification pool 2 At 2.5, after rapid stirring and mixing, react for 5 minutes;
[0027] Step (3) Electrocoagulation reduction treatment: send the acidified wastewater into the electrocoagulation reduction device 3; the reaction time of the wastewater in the electrocoagulation reduction device 3 is 20 minutes; Using iron plates, under the...
Embodiment 3
[0032] Embodiment 3: as figure 1 A kind of electroplating chromium-containing wastewater treatment method shown, comprises the steps:
[0033] Step (1) Regulating water quality: first discharge the chromium-containing wastewater produced in the electroplating workshop into the regulating pool 1, and fully adjust the water quality and quantity through the stirring and mixing device 9;
[0034] Step (2) Acidification: Send the waste water regulated in step (1) into the acidification pool 2 through the lift pump 14; automatically add sulfuric acid to the acidification pool 2 through the online pH control device 11 to control the pH value in the acidification pool 2 In 2.7, after rapid stirring and mixing, react for 7.5 minutes;
[0035] Step (3) Electrocoagulation reduction treatment: send the acidified wastewater into the electrocoagulation reduction device 3; the reaction time of the wastewater in the electrocoagulation reduction device 3 is 25 minutes; Using iron plates, und...
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