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Method for treating high-acid high-chlorine waste water

A high-chlorine wastewater treatment method technology, applied in metallurgical wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve pollution and other problems, achieve strong operability, high comprehensive utilization rate, The effect of simple process

Inactive Publication Date: 2014-05-07
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to propose a method for effectively removing heavy metal ions in high-acid and high-chloride wastewater for the above-mentioned heavy metal pollution problem

Method used

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  • Method for treating high-acid high-chlorine waste water
  • Method for treating high-acid high-chlorine waste water
  • Method for treating high-acid high-chlorine waste water

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Example 1: The treatment method of high-acid and high-chlorine wastewater in this embodiment is: the composition of the wastewater used is 670 mg / L of arsenic; 39090 mg / L of zinc, 290 mg / L of lead, and 40 mg / L of cadmium. The industrial wastewater obtained by the smelting metal industry .

[0019] like figure 1 Shown, the treatment method of this high-acid high-chlorine wastewater is as follows:

[0020] (1) Removal of arsenic: Mix waste water and water at a volume ratio of 1:1, then add iron sulfate into the mixture according to the molar ratio of Fe:As of 4:1, and then adjust it with a sodium hydroxide solution with a concentration of 10mol / L The pH of the mixed solution is 4, and after aging for 0.5 hours, the underflow and supernatant are separated, and the underflow is filtered to obtain FeAsO 4 high arsenic slag, the filtrate is returned to the mixed solution for recycling;

[0021] (2) Removal of zinc, lead and cadmium: adjust the pH value of the supernat...

Embodiment 2

[0022] Embodiment 2: the high-acid and high-chlorine wastewater treatment method of this embodiment is: the composition of the wastewater used is the industrial wastewater obtained from the smelting metal industry containing 700mg / L of arsenic, 36000mg / L of zinc, 270mg / L of lead, and 35mg / L of cadmium. .

[0023] like figure 1 Shown, the treatment method of this high-acid high-chlorine wastewater is as follows:

[0024] (1) Removal of arsenic: Mix waste water and water at a volume ratio of 1:2, then add ferric sulfate into the mixture according to the molar ratio of Fe:As of 3:1, and then adjust it with a sodium hydroxide solution with a concentration of 8mol / L The pH of the mixed solution is 3. After aging for 1 hour, the underflow and supernatant are separated, and the underflow is filtered to obtain FeAsO 4 high arsenic slag, the filtrate is returned to the mixed solution for recycling;

[0025] (2) Removal of zinc, lead and cadmium: adjust the pH value of the supern...

Embodiment 3

[0026] Embodiment 3: the high-acid and high-chlorine wastewater treatment method of this embodiment is: the composition of the wastewater used is the industrial wastewater obtained from the smelting metal industry containing 590 mg / L of arsenic; 34560 mg / L of zinc, 220 mg / L of lead, and 19 mg / L of cadmium .

[0027] like figure 1 Shown, the treatment method of this high-acid high-chlorine wastewater is as follows:

[0028] (1) Removal of arsenic: Mix waste water and water at a volume ratio of 1:3, then add iron sulfate into the mixture according to the molar ratio of Fe:As of 5:1, and then adjust it with a sodium hydroxide solution with a concentration of 12mol / L The pH of the mixed solution is 6. After aging for 2 hours, the underflow and supernatant are separated, and the underflow is filtered to obtain FeAsO 4 high arsenic slag, the filtrate is returned to the mixed solution for recycling;

[0029] (2) Removal of zinc, lead and cadmium: adjust the pH value of the sup...

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Abstract

The invention relates to a method for treating high-acid high-chlorine wastewater, which belongs to the field of wastewater treatment in metallurgy industry. A wastewater sample is added into clear water with the same volume as the wastewater sample, then ferric sulfate is added to the clear water, a potential of hydrogen (pH) value of mixed liquid is adjusted through a sodium hydroxide solution, and filtration is performed after ageing to remove arsenic in the wastewater; The sodium hydroxide solution is used again to adjust a pH value of supernate, simultaneously a small amount of solid sodium carbonate is added into the supernate to perform ageing and filtration so as to remove zinc, lead and cadmium in the wastewater; and finally the supernate precipitated in the last step is distilled. The wastewater treated by means of the method can meet the national drainage standards, and zinc, arsenic and other heavy metal in produced heavy-metal sludge are recycled through a pyrogenic process smelting process. The method for treating the high-acid high-chlorine wastewater is simple in operation, occupied area is small, the comprehensive recycling and utilizing rate of heavy metal is high, and treated wastewater meets the national drainage standards.

Description

technical field [0001] The invention relates to a method for effectively removing heavy metal ions in high-acid and high-chlorine wastewater, belonging to the field of wastewater treatment in the metallurgical industry. Background technique [0002] With the accelerated development of the national economy, the pollution of industrial wastewater is becoming more and more serious. The smelting industry is one of the main sources. The pollution of heavy metal wastewater in the smelting industry accounts for a considerable proportion. Heavy metals are typical inorganic toxic substances. Since heavy metal ions themselves cannot be decomposed or degraded by organisms, once heavy metal ions enter the human body through the food chain, they will coordinate, transfer, and coordinate with proteins in the human body, directly changing the composition of organic matter in the human body. Normal physiological functions lead to various diseases and even death in the human body. Therefore,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F101/12C02F101/20C02F103/16
Inventor 张利波楚天福彭金辉刘秉国巨少华夏洪应
Owner KUNMING UNIV OF SCI & TECH