Oily water demulsifying method using micro-electric fields

Abstract

The invention provides an oily water demulsifying method using micro-electric fields. The method comprises the following steps: 1, a micro-electric field pulse generator generates pulse electric fields with a voltage of 0-24 V and a frequency of 20 HZ - 2 MHZ; and 2, the oily water goes through the pulse electric fields to achieve oil-water separation. The micro-electric field of the present invention is realized by alternately arranging anode plates and cathode plates, the anode plates and the cathode plates are connected with the pulse electric field generator through connection terminals, and are powered on to form a plurality of demulsifying micro-electric fields, the oily water upwards enters the micro-electric fields from a supporting plate provided with holes, and liquid drops in the oily water are collided, stretched and coalesced under the action of the pulse electric fields to make the dispersed liquid drops aggregate and stratify, so the water phase and the oil phase are separated. The method has an excellent separation effect.

Description

technical field [0001] The invention relates to the technical field of oil-water separation equipment, in particular to a micro-electric field oil-water demulsification equipment. Background technique [0002] At present, for the treatment of oily sewage, the main bottleneck is the separation of oil and water and the removal rate of oil. There are many treatment methods for oil removal, such as gravity separation, coarse-grained hair, filtration, and air flotation. , Adsorption, membrane separation, ultrasonic, chemical, biological and so on. [0003] However, there are a series of problems in the use of these technologies, such as the gravity method, which is difficult to separate high-density oil, the equipment is large in size, and consumes a lot of power; the coarse-grained method is easy to block, and the effect of long-term use is significantly reduced; Filtration method is easy to block, requires high backwashing, easy to block, and difficult to regenerate; air flota...

AI Technical Summary

Problems solved by technology

[0003] However, there are a series of problems in the use of these technologies, such as the gravity method, which is difficult to separate high-density oil, the equipment is large in size, and consumes a lot of power; the coarse-grained method is easy to block, and the effect of long-term use is significantly reduced; Filtration method is easy to block, requires high backwashing, easy to block, and difficult to regenerate; air flotation method takes up a large area and needs to add chemicals, which will generate a lot of scum and secondary pollution; adsorption method needs to add chemicals , the regeneration of the adsorbent is difficult, and there is secondary pollution; the membrane separation method is expensive, easy to block, and difficult to regenerate; the ultrasonic method is expensive, has high requirements for raw water quality, and has a narrow application range; Pollution, high cost; biological method, covers a large area, and has strict requirements on operating conditions

[0004] In addition, at present, the development of most oilfields in my country has entered the middle and late stages, that is, the period of high water cut. In order to ensure the oil content of the produced fluid, more and more oilfields have adopted the process of polymer flooding. The oil recovery rate is increased, but the difficulty of the associated oily sewage treatment is also greatly increased, especially the emulsification phenomenon is particularly obvious, and the demulsification has become the primary problem to be solved in the treatment of the oily sewage

[0005] At present, each oil field adopts the method of chemical demulsification, that is, adding a corresponding amount of demulsifier to the sewage to achieve the effect of demulsification. Due to the chemical demulsification, it also causes secondary damage to the environment during the demulsification process. Pollution

Images