Process for reclaiming and treating phosphorization sewage

A treatment method and sewage recycling technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, osmosis/dialysis water/sewage treatment, etc., can solve the waste of water resources, increase operating costs, and increase process flow , operation difficulty and other issues, to achieve the effect of reducing treatment cost, convenient operation, and solving the problem of sewage discharge not up to standard

Inactive Publication Date: 2008-01-09
胡建平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the above-mentioned treatment methods, it is difficult for total phosphorus to meet the discharge requirements of the national standard. In order to make the discharge of total phosphorus meet the standard, some manufacturers have to carry out secondary treatment, tertiary treatment, and even biological phosphor

Method used

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  • Process for reclaiming and treating phosphorization sewage
  • Process for reclaiming and treating phosphorization sewage

Examples

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Embodiment Construction

[0018] Shown in Fig. 2, be the specific embodiment of phosphating sewage recovery treatment method of the present invention, it comprises the steps:

[0019] 1) Add caustic soda or sulfuric acid to the neutralization tank 4 to neutralize the sewage produced in the degreasing process and the phosphating process, so that the pH value of the sewage in the neutralization tank 4 is controlled at 7-9 ;

[0020] 2) The neutralized treated water enters the reaction tank 5, and coagulants such as polyphosphoric acid, ferric chloride and polyaluminum chloride are added in an amount of 3-8.0 mg / L respectively, and rapid stirring is carried out for 1-2 minutes , so that the coagulant is evenly distributed, and then stirred at a slow speed for 15 to 30 minutes, which is conducive to coagulation. The treated water and oil in the reaction tank 5 are controlled at ≤1.0mg, the total phosphorus is controlled at ≤1.0mg, and the zinc is controlled at ≤3.2 mg;

[0021] 3), the treated water afte...

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Abstract

This invention discloses a method for treatment and recovering of waste-water from bonderizing process. The method comprises procedures of: (1), waste-water from oil-removing washing of bonderizing process of from bonderizing process washing step is fed into neutralization tank (IV), adding alkali or acid to regulate its pH value of 7-9; then (2), it is fed into reaction tank (V), adding flocculating agent, and agitating, controlling the oil<=1.0mg; total phosphorous<=1.0mg, Zinc<=3.2mg; (3), it is then fed into settling tank (VI), controlling its suspension solid<=0.7mg; (4), after settling, the water is fed into clarification tank (VII), and stored for cyclic utilization. The advantages of this invention are: low cost, reducing water consumption and reducing water pollution.

Description

technical field [0001] The invention relates to a treatment method for phosphating process sewage, in particular to a method for recycling and utilizing the phosphating process sewage. Background technique [0002] Phosphating process is one of the important processes of anti-theft doors. Its purpose is to improve the corrosion resistance of the steel plate and the adhesion with the coating; the existing phosphating process includes degreasing, cleaning, pickling, cleaning, surface adjustment, During phosphating, cleaning, passivation and other processes, a large amount of sewage is produced during the phosphating process. In order to protect the ecological environment and avoid environmental pollution caused by direct discharge of sewage into nature, the current phosphating process sewage treatment method is shown in Figure 1. It shows that the sewage produced by degreasing cleaning, pickling cleaning, and phosphating cleaning is concentrated in the neutralization tank and ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/44C02F1/52
Inventor 胡建平李强
Owner 胡建平
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