Circulating reflux device for oil-containing emulsified liquid

Abstract

The invention discloses a circulating reflux device for an oil-containing emulsified liquid. The circulating reflux device comprises an ultrafiltration circulating tank, an ultrafiltration circulating pump, an ultrafiltration washing tank and an ultrafiltration membrane pipe rack, wherein a circulating liquid outlet pipe is arranged at the bottom of the ultrafiltration circulating tank and is connected to the ultrafiltration membrane pipe rack through the ultrafiltration circulating pump; two branch division pipes are arranged at the tail part of the ultrafiltration membrane pipe rack and are respectively connected to the ultrafiltration washing tank and a circulating liquid inlet pipe which is connected to the upper part of the ultrafiltration circulating tank; a liquid outlet of the circulating liquid inlet pipe is fixedly mounted in a cylindrical shell of the ultrafiltration circulating tank in a tangential direction. According to the circulating reflux device, water is suctioned from one side at the bottom of the circular ultrafiltration circulating tank by virtue of the ultrafiltration circulating pump, and the emulsified liquid which is ultrafiltered and concentrated enters the circulating tank from the tangential direction at the other side of the ultrafiltration circulating tank at the same time, so that the emulsified liquid is circulated at a high speed in the tank body, i.e., the emulsified liquid basically cannot be enriched and stickily bonded in the ultrafiltration circulating tank; meanwhile, the circulating liquid can be stirred well, so that the high oil removing efficiency and the high continuous production efficiency of the whole device are realized.

Description

technical field [0001] The invention relates to the post-treatment field of oily sewage, in particular to a circulating backflow device for oily emulsion containing sewage after preliminary treatment. Background technique [0002] Oil-containing emulsion is also called emulsified oil. The particle size of oil droplets is less than 10 μm. The particle size of oil dispersed in wastewater is very small, and it is in an emulsified state, which is not easy to separate from wastewater; wastewater containing emulsified oil will be collected in process facilities and The suspended particles and iron scale in the pipeline equipment settle together with the wastewater, forming a relatively viscous sludge mass, which blocks the pipeline and equipment and affects the normal production. [0003] At present, filter membranes are used on the market to remove the emulsified oil in the oil-containing emulsion, but during the transmission of this oil-containing emulsion in the pipeline, the e...

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Problems solved by technology

[0002] Oil-containing emulsion is also called emulsified oil. The particle size of oil droplets is less than 10 μm. The particle size of oil dispersed in wastewater is very small, and it is in an emulsified state, which is not easy to separate from wastewater; wastewater containing emulsified oil will be collected in process facilities and The suspended particles and iron scale in the pipeline equipment settle together with the wastewater, forming a relatively viscous sludge mass, which blocks the pipeline and equipment and affects the normal production

[0003] At present, filter membranes are used on the market to remove the emulsified oil in the oil-containing emulsion, but during the transmission of this oil-containing emulsion in the pipeline, the emulsified oil in it is easy to accumulate in the pipeline, forming a relatively viscous oil mass, which is easy Blocking the sewage treatment pipeline, the oily sewage treatment devices on the market need to be shut down and cleaned after working for a period of time, which is time-consuming and laborious to operate, which increases the cost of production and maintenance of the enterprise; The body uses the stirring motor to assist stirring to break into the emulsified oil. However, working in an oily working environment for a long time not only wastes a lot of electric energy, but also easily enriches the emulsified oil on the stirring paddle of the stirring motor, which affects its normal service life.

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