A method for removing total nickel and dissolved organic matter in nickel-containing waste water from cold rolling
A technology for nickel wastewater and water quality, applied in chemical instruments and methods, water pollutants, metallurgical wastewater treatment, etc.
Active Publication Date: 2022-02-22
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology
[0003] So far, there is no treatment process for total nickel and DOM in nickel-containing wastewater from cold rolling
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[0019] A process system for removing total nickel and DOM in nickel-containing wastewater from cold rolling, including a first-stage lift pump, a modified converter steel slag adsorption tower, a modified converter steel slag, a second-stage lift pump, a pH adjustment tank, a third-stage lift pump, and a modified Resin adsorption tower, ethanolamine modified chelating resin, drainage pump.
[0020] The water quality of the cold-rolling nickel-containing wastewater is as follows: total nickel is 1.7-8.5 mg / L, DOM is 45-67 mg / L, and pH is 6.5-7.9.
[0021] The nickel-containing cold-rolling waste water enters the modified converter steel slag adsorption tower through a primary lift pump, and the residence time in the modified converter steel slag adsorption tower is 16-32 minutes. The modified converter steel slag accounts for 75-88% of the internal volume of the modified converter steel slag adsorption tower. Modified converter steel slag is loose and porous, has a large speci...
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Abstract
The invention belongs to the technical field of water treatment, and specifically relates to a method for removing total nickel and dissolved organic matter (DOM) in cold-rolled nickel-containing wastewater, comprising the following steps: the cold-rolled nickel-containing wastewater enters a modified converter steel slag adsorption tower, and The residence time in the modified converter steel slag adsorption tower is 16 to 32 minutes; the modified converter steel slag adsorbent accounts for 75 to 88% of the internal volume of the modified converter steel slag adsorption tower; then enters the pH adjustment tank, adding dilute hydrochloric acid, and the residence time is 12 ~18 minutes, the pH of the effluent is 6.6~8.2; after passing through the regulating tank, the cold-rolled nickel-containing wastewater enters the modified resin adsorption tower, and the modified resin adsorption tower is equipped with ethanolamine-modified chelating resin, and the cold-rolled nickel-containing wastewater passes through After the modified resin adsorption tower reaches the standard discharge. The effluent water quality after being treated by the method of the present invention is: total nickel is 0.06-0.09 mg / L, DOM is 9-13 mg / L, and pH is 6.8-8.1.
Description
technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a process and method for efficiently removing total nickel and dissolved organic matter in cold rolling nickel-containing wastewater. Background technique [0002] After the cold-rolled nickel-plating process, the strip surface needs to be rinsed with pure water, and the wastewater after rinsing the strip is mostly discharged to the wastewater station due to the presence of nickel ions and dissolved organic matter (Dissolved Organic Matter, referred to as DOM). [0003] So far, there is no treatment process for total nickel and DOM in nickel-containing wastewater from cold rolling. The purpose of the present invention is exactly according to the water quality and quantity situation of cold-rolled nickel-containing water, develops and removes the method technical scheme of total nickel and soluble organic matter in the cold-rolled nickel-containing wastewater, ...
Claims
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IPC IPC(8): C02F1/28C02F101/20C02F101/30C02F103/16
CPCC02F1/281C02F1/285C02F2201/007C02F2303/14C02F2101/20C02F2101/30C02F2103/16
Inventor 李恩超叶倩汪庆丰
Owner BAOSHAN IRON & STEEL CO LTD