An integrated equipment for treating waste emulsion based on demulsification and two-stage vertical flow air flotation

Abstract

The invention provides an integrated device for treating a waste emulsion based on demulsification and two-stage vertical flow air floatation. The integrated device comprises a pipeline demulsification part, a circulating flow control part, a gas-liquid mixing part, a solid-liquid separation part and a drainage part, wherein the pipeline demulsification part and the gas-liquid mixing part can be dynamically coordinated with each other, the technical effect of dynamically switching the operation modes is achieved by adopting three different operation modes, the pipeline demulsification part canbe independently started to generate microbubbles and provide floating power, the pipeline demulsification part and the gas-liquid mixing part are both started to generate microbubbles, the air flotation effect is enhanced, and the solid-liquid separation efficiency is improved. Demulsification and air floatation are integrated, the whole device is made of an organic glass transparent material, and operation parameters can be fed back and adjusted according to direct observation of operation conditions. The integrated device can realize rapid demulsification separation of the waste emulsion,can effectively improve the problems of insufficient floating power and poor separation effect of demulsified flocs, and has the advantages of simple method, rapidness in reaction and high treatment efficiency.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to an integrated device for treating waste emulsion based on demulsification and two-stage vertical flow air flotation. Background technique [0002] In the mechanical and electronic processing industries, emulsions are widely used in metal processing for their good lubricating, cooling, and antirust effects. The emulsion that has been recycled many times is oxidized and polluted during use, and a large amount of waste emulsion is finally produced. These discarded emulsions contain a large amount of mineral oil and emulsifiers. In addition, they also contain additives such as bactericides and rust inhibitors (including dust and heavy metals). The composition is complex, the pollution load is high, and the hazards are extremely high. The Ministry of Environmental Protection listed it as hazardous waste (HW09). [0003] In the waste emulsion, the tiny oil droplets are wra...

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Problems solved by technology

[0008] In view of the above defects, the present invention proposes the concept of pipeline demulsification coupled with two-stage air flotation separation to treat waste emulsion, and designs and manufactures an integrated equipment for pipeline demulsification and rapid separation of flocs after demulsification, which reduces the occupied area. The floor area saves space resources; the two-stage air flotation produces more microbubbles, which provides stronger power for the flocs to float up and strengthens the separation effect; the two-stage air flotation can be combined in multiple modes, and can be switched according to the properties of the waste emulsion Mode, which can effectively improve the problem of insufficient floating force and poor separation effect; the whole equipment is made of plexiglass transparent material, and the operating parameters can be adjusted based on direct observation of operating conditions

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