Double-surface special infiltration material for demulsification and separation of oil-in-water emulsion

Abstract

The invention discloses a double-surface special infiltration screen material for fast demulsification and separation of oil-in-water emulsion. Through chemical surface treatment, stainless steel screens are respectively prepared into two special infiltration screen materials with superhydrophilic / superhydrophilic and superhydrophilic / superhydrophilic properties, the two are combined into a double-surface special infiltration composite screen material by using a binder so as to achieve the purpose of fast demulsification and separation of the oil-in-water emulsion, and the double-surface special infiltration composite screen material can be used for fast demulsification and purifying of oil-in-water emulsified wastewater. Compared with other technologies, the material used for demulsification and purifying of emulsified wastewater has a single treatment process, does not need to use adsorbents and demulsifiers, has the remarkable advantages of small secondary pollution, low treatment cost, high treatment efficiency, strong adaptability, simple treatment equipment and the like, can reduce or eliminate the problems existing in the current demulsification technology, solves the difficult problem of emulsion demulsification and purifying in the oil-water separation field, and has wide application prospect.

Description

technical field [0001] The invention belongs to the field of oil-water separation and water pollution control and purification, and its technical content relates to the preparation of a double-surface special wetting characteristic screen material for rapid demulsification and separation of oil-in-water emulsions, especially the two A sieve combination with special wetting characteristics is a double-surface special wetting characteristics sieve membrane, which can be directly used for the separation and purification of oil-in-water emulsified wastewater through a simple filter device, thereby overcoming the current demulsification purification technology Existing problems. Background technique [0002] The problem of oil-water separation has become an important worldwide problem in the field of environmental protection and industry. Because oil extraction, refining, petrochemical, organic chemical, metal processing, textile, leather processing, food processing, lubricants ...

AI Technical Summary

Problems solved by technology

However, from the perspective of practical application, these technologies often have problems such as low separation efficiency, poor stability, strict requirements on the type of oil-water mixture, difficult to solve the problem of membrane fouling, and high processing costs, which lead to certain difficulties in practical application.

[0004] The emergence of new materials with special surface wettability makes it possible to achieve efficient demulsification, separation and purification of oil-containing emulsified wastewater in a single treatment. Even so, these materials are not ideal for the separation of emulsifier-stabilized oil-in-water emulsions.

The reason is that for superhydrophobic / superoleophilic materials, although it is possible to prevent a small amount of dispersed phase water droplets in water-containing oil from passing through the filter membrane made of superhydrophobic / superoleophilic materials, it is difficult to make the oily sewage The small amount of dispersed phase oil droplets present completely contact the surface of the material