Abstract
In this work researches on division of water oil emulsions and oil-containing waste by a coalescention method on granular polymers from a polytetrafluoroethylene (PTFE) with sizes of particles of grains from 0,5 mm to 3 mm are conducted. Dynamic filtration of an emulsion was carried out through grains of polymer filled in a column with a diameter of 10 mm, the mass of grains of polymer was 2 g, and height of filling of a column of 10-12 cm. Speed of filtration of these emulsions through a column depends on the size of grains of a polytetrafluoroethylene. So with increase in the size of particles the speed of filtration increases, but the efficiency of removal of oil products decreases. Extent of cleaning of a water oil emulsion of oil products with initial concentration of 828 mg/dm3 made 62% at filtration through polymer with sizes of grains <0,5 mm and 51% at filtration of an emulsion through polymer grains with a size more than 3 mm. The efficiency of removal of free oil products was more than 90% of waste water. On the surface of grains of polymers the coalescention and aggregation of a particle of oil products is observed. Coalescention of oil products on grains of polymer is effective at removal from the unstable and stratified emulsions.
Highlights
In sewage oil products to be in the free, emulsified and dissolved states
Speed of filtration of an emulsion through a column filled with polymer grains minimum at the size of grains less than 0,5 mm
At increase in the size of grains of polymer up to 1 mm filtration speed sharply increases by 4-6 times
Summary
In sewage oil products to be in the free, emulsified and dissolved states. Free oil products and large particles of oil products, oils, are removed as a result of upholding in settlers and petrotraps. In works [10, 12] installations of separation of an oil phase from an emulsion like oil in water are developed In these devices process of a coalescention happens between thin layer plates. When using of the granulated material with lack of a time (the adsorbent; 2 - withdrawal of a filtrate; 3 - glass granulated polyethylene, polytetrafluoroethylene, polyvinylchloride) placement of particles of oil is possible only between gran- The size of particles of a disperse phase of emulsions, determined ules in a sorbent layer at the expense of capillary forces and water- by method of dynamic light scattering (DLS), and ζ-potential - - -. The efficiency of cleaning of installation was determined by extent of removal oil products and the weighed substances on a formula:
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