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Method for treating electrogalvanizing wastewater

A treatment method and electro-galvanizing technology, applied in water/sewage treatment, water/sewage multi-stage treatment, neutralized water/sewage treatment, etc. Large proportion, strong degreasing and dirt-carrying capacity, and investment saving effect

Active Publication Date: 2021-09-28
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a treatment method for electro-galvanized wastewater in view of the problems of large electro-galvanized wastewater sludge output and poor organic pollutant removal effect in the electro-galvanized wastewater treatment process existing in the prior art

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  • Method for treating electrogalvanizing wastewater
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Embodiment 1

[0043] A treatment method for electro-galvanized wastewater, comprising the following steps:

[0044] Step 1, introduce the high-concentration organic waste plating solution into the mobile biochar adsorption tank, the filter material height is 1.5m, and the filtration rate is 6m / h. The biochar filter material is prepared by the following method: (1) take a certain amount of walnut shells and wash them, Dry at 105°C, crush and sieve, and take 6-12 mesh walnut shell particles; (2) Fully mix the prepared walnut shell particles, urea, and potassium bicarbonate according to the mass ratio of 4:2:1, and then insulate at 635°C Pyrolysis under the condition of oxygen for 3.0h; (3) After cooling the above materials, ultrasonically immerse them in 0.2mol / L hydrochloric acid solution for 1.5h, the ultrasonic frequency is 50kHz, the ultrasonic power is 100W, and then rinse with distilled water several times until neutral, After drying at 105°C, the biochar filter material was obtained. ...

Embodiment 2

[0053] Step 1, introduce the high-concentration organic waste plating solution into the mobile biochar adsorption tank, the filter material height is 1.5m, and the filtration rate is 6m / h. The biochar filter material is prepared by the following method: (1) take a certain amount of walnut shells and wash them, Dry at 105°C, crush and sieve, and take 6-12 mesh walnut shell particles; (2) Fully mix the prepared walnut shell particles, urea, and potassium bicarbonate according to the mass ratio of 4:2:1, and then insulate at 635°C Pyrolysis under the condition of oxygen for 3.0h; (3) After cooling the above materials, ultrasonically immerse them in 0.2mol / L hydrochloric acid solution for 1.5h, the ultrasonic frequency is 50kHz, the ultrasonic power is 100W, and then rinse with distilled water several times until neutral, After drying at 105°C, the biochar filter material was obtained. This step can adsorb and remove some high-concentration organic pollutants, and reduce the conce...

Embodiment 3

[0062] Step 1, introduce the high-concentration organic waste plating solution into the mobile biochar adsorption tank, the filter material height is 1.5m, and the filtration rate is 6m / h. The biochar filter material is prepared by the following method: (1) take a certain amount of walnut shells and wash them, Dry at 105°C, crush and sieve, and take 6-12 mesh walnut shell particles; (2) Fully mix the prepared walnut shell particles, urea, and potassium bicarbonate according to the mass ratio of 4:2:1, and then insulate at 635°C Pyrolysis under the condition of oxygen for 3.0h; (3) After cooling the above materials, ultrasonically immerse them in 0.2mol / L hydrochloric acid solution for 1.5h, the ultrasonic frequency is 50kHz, the ultrasonic power is 100W, and then rinse with distilled water several times until neutral, After drying at 105°C, the biochar filter material was obtained. This step can adsorb and remove some high-concentration organic pollutants, and reduce the conce...

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Abstract

The invention discloses a treatment method of electrogalvanizing wastewater. The treatment method comprises the following steps: step 1, adsorbing a high-concentration organic waste plating solution by utilizing a biochar filter material; step 2, mixing with wastewater of other processes, and balancing water quantity and water quality; step 3, adjusting the pH value of the wastewater by adding an alkaline solution; step 4, adding hydrogen peroxide into the comprehensive wastewater for Fenton oxidation reaction, and removing organic pollutants through oxidation; step 5, adding an alkaline solution into the comprehensive wastewater, carrying out a neutralization reaction, and adjusting the pH value of the wastewater to be slightly alkaline so as to facilitate a subsequent precipitation reaction; step 6, carrying out solid-liquid separation to remove heavy metals such as iron and zinc and particulate pollutants; and step 7, adsorbing organic pollutants in the wastewater by using activated carbon. The method is simple in process flow, good in treatment effect and high in removal rate.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for treating electrogalvanized wastewater. Background technique [0002] China is a big country in steel production and consumption. In recent years, the steel galvanizing industry has developed rapidly. Surface galvanizing is a wide range of anti-corrosion methods, and the most widely used is electro-galvanizing technology. The electro-galvanizing process is a water-consuming process. The waste water mainly comes from pickling and electroplating waste liquid and rinsing liquid. The waste water contains a large amount of organic substances such as acid, heavy metal ions (iron, zinc, etc.) and brighteners. Electrogalvanizing wastewater has the characteristics of strong acidity, high concentration of organic matter and high toxicity, which is extremely harmful to the ecological environment. Therefore, it is very necessary to effectively treat electrogalvanizi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04B01J20/20B01J20/30C02F101/20C02F101/30
CPCC02F9/00B01J20/20C02F1/283C02F1/66C02F1/722C02F2101/30C02F2101/20C02F2101/203C02F2001/007Y02W10/10
Inventor 吕龙义任芝军
Owner HEBEI UNIV OF TECH
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