Oilfield Produced Water Organic Tubular Ultrafiltration Membrane Treatment Process

Abstract

The invention provides an oil field produced water organic tubular ultrafiltration membrane treatment process. The oil field produced water organic tubular ultrafiltration membrane treatment process comprises the following steps: adding produced water into an evaporation system, guiding first produced water concentrated liquid of the evaporation system and residues thereof into a dirty oil tank and guiding first produced water percolate of the evaporation system into an ultrafiltration system; guiding second produced water concentrated liquid of the ultrafiltration system into a nanofiltrationsystem and guiding second produced water percolate of the ultrafiltration system into a solution tank; discharging one part of third produced water concentrated liquid of the nanofiltration system, guiding the other part of third produced water concentrated liquid of the nanofiltration system into the ultrafiltration system, adding a surfactant, a high polymer and alkali into the third produced water concentrated liquid of the nanofiltration system and then guiding into the solution tank; and performing configuration on the second produced water percolate and the third produced water percolate mixed with the surfactant, the high polymer and the alkali in the solution tank to obtain configuration water, so that physical recyclable decomposition of produced water is realized, the recyclingrate is increased by a guiding mode, and the cost, efficiency and resources are greatly improved.

Description

technical field [0001] The present application relates to the technical field of ultrafiltration membranes, in particular to an organic tubular ultrafiltration membrane treatment process for oilfield produced water. Background technique [0002] The ultrafiltration membrane is composed of an extremely thin skin layer that acts as a separation and a thicker sponge-like or finger-like porous layer that acts as a support, cutting membranes with a relative molecular mass of several thousand to several million; ultrafiltration membranes It is widely used in industry and has become one of the new chemical unit operations. It is used in the separation, concentration and purification of biological products, pharmaceutical products and food industry, and is also used in terminal treatment devices in blood treatment, wastewater treatment and ultrapure water preparation. With the advancement of technology, the screening function of ultrafiltration membrane has been improved. Improve a...

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Problems solved by technology

In addition to a large number of organic pollutants that are difficult to degrade, the produced water also has a relatively high concentration of ions, because the groundwater itself has a much higher salt concentration than the surface water; the current treatment methods for produced water include hydrolysis and acidification, and anaerobic treatment is the best. Oxygen treatment of produced water to achieve the effect of degrading produced water, but the method of hydrolytic acidification requires the cultivation of hydrolytic bacteria and acidifying bacteria, such as: methanogenic bacteria and hydrolytic acid producing bacteria. Bacterial cultivation is time-consuming, and the hydrolysis reaction time is too long, thus In terms of cost, the above bacteria are one-time reactants, so the cost of consumption is also huge;

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