Treatment method and treatment system for emulsified liquid

Abstract

The invention relates to an emulsified liquid treatment method which comprises the following steps: a, demulsification: heating and stirring an emulsified liquid, and adding a demulsifier into the emulsified liquid at the same time to separate oil from water in the emulsified liquid; b, oil removal: removing floating oil floating on the liquid level of the emulsified liquid; c, performing iron-carbon electrolysis; d, flocculation pretreatment: adding metal ions into the waste liquid to increase the concentration of metal ions in the waste liquid; e, precipitation: adding hydroxide base into the waste liquid and stirring to form water-insoluble metal hydroxide precipitate in the waste liquid; f, flocculation: adding PAM to the waste liquid so as to make the metal hydroxide and the PAM to beconnected to form coarse floccules; and g, filtering: making the wastewater pass through a filter to filter out floccules in the wastewater and remove metal ions in the wastewater. The method has theadvantages that the process is simple, metal ions can be removed, and environmental pollution is reduced.

Description

Technical field [0001] The present invention relates to the technical field of wastewater treatment, in particular to an emulsion treatment method and treatment system. Background technique [0002] my country is a country with a shortage of water resources and has been listed by the United Nations as one of 13 water-poor countries. At the same time, my country’s waters have always been under pressure from water pollution, of which industrial wastewater is an important source of water pollution. The emulsion is mainly composed of 2~10% mineral oil, anionic or non-ionic emulsifiers, additives (chlorine, sulfur, phosphorus, etc.), and water. It has the functions of cooling, lubrication, cleaning, and rust prevention. Rolling, broaching, reaming, polishing, leveling, cutting and other processes lead to deterioration and discharge. As the first industrial waste water, waste emulsion has a wide range of sources, mainly in the machining industry, especially in the cutting and grinding...

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned technical solution has the following defects: the treatment method lacks the removal means for metal ions, so that the emulsion still contains a lot of metal ions after being treated, polluting the environment

In addition, the equipment used in the existing sedimentation method mainly relies on the addition of demulsifiers to separate the oil and water in the emulsion, and the reaction time is relatively long

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