Method for removing iron ions from sewage with high iron content

A technology of iron content and iron ions, applied in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. Achieve high water quality stability, overcome short process flow and reduce work intensity

Active Publication Date: 2015-01-21
BEIJING ENRUIDA TECH
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  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the invention of this application is to solve the problem that existing iron removers cannot remove high-concentration iron-containing sewage, and provide a method for removing iron ions in high-concentration iron-containing sewage

Method used

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Embodiment Construction

[0017] A method for removing iron ions in high-concentration iron-containing sewage of the present invention comprises the following steps:

[0018] (1) Add 50-200mg / l iron removal additives such as hydrogen peroxide to the sewage with an iron content of 50mg / l-200mg / l, and then mix thoroughly for 1-10 minutes; make hydrogen peroxide and iron dissolved in water The ions undergo a chemical reaction, and the iron ions become fine iron compounds to precipitate;

[0019] (2) Add 5-30mg / l iron remover such as sodium citrate, and then mix thoroughly for 1-10 minutes;

[0020] (3) Finally add 1-3 mg / l phase transfer agent such as: polyacrylamide, and then fully mix for 1-20 minutes, using the multiple forces between the particles and the selective reaction to iron ions, the fine particles in step (1) The iron compound flocculates into large flocs, settles quickly, and is discharged through the sewage outlet.

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Abstract

The invention relates to a method for removing iron ions from sewage with high iron content. The method comprises the following steps of: adding a 50 to 200mg deironing aid into each liter of sewage with the high iron content and fully mixing for 1 to 10 minutes; adding a 5 to 30mg deironing agent into each liter of sewage and fully mixing for 1 to 10 minutes; and adding a 1 to 3mg phase transfer agent into each liter of sewage and fully mixing for 1 to 20 minutes, wherein the iron ions in the sewage are flocculated into large particle floccus, settled quickly and discharged from a drain outlet. Water treated by the method has quite high water quality stability, and the quality change of the treated water due to unstable factors in the long-distance pipeline transfer process is reduced. The treated water meets the requirement of the quality of water injected into an oil pool and has high compatibility, deep pollution to stratums is reduced, and a large number of water sources are saved.

Description

technical field [0001] The invention relates to a method for removing iron ions in sewage, in particular to a method for removing iron ions in sewage with high concentration of iron. Background technique [0002] The high-efficiency iron removal technology for water treatment is a patented technology developed for the complex water quality of special oil fields. Because the water quality of individual oil fields is particularly complex and has the characteristics of high iron content, the treatment is very difficult. Conventional iron removal agents are not ideal for water quality treatment. , after a long time of technical research by technicians, combined with a large number of on-site practical applications, good results have been achieved. Contents of the invention [0003] The purpose of the invention of this application is to solve the problem that the existing iron remover cannot remove the sewage with high concentration of iron, and provide a method for removing ir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/64C02F1/52C02F1/54C02F1/56
Inventor 张晓瑞段维庆侯德霞
Owner BEIJING ENRUIDA TECH
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