Device and method for treating oil and gas field produced water by utilizing organic matter degradation self-supply energy

Abstract

The present invention relates to a device and method for treating produced water from oil and gas fields by using organic matter degradation and self-supply energy, wherein the anode pool, desalination pool and cathode pool of the device for treating oil-gas field produced water by using organic matter degradation and self-supply are arranged adjacently in sequence, and the two desalination pools There are cut holes on each side, and cation exchange membranes are installed at the cut holes; the carbon fiber conductive brush is placed in the anode pool as the anode electrode, and the air cathode is placed in the cathode pool as the cathode electrode; the positive electrode group and the negative electrode group are desalinated. The cells are parallel to each other, and a mesh separator is embedded in the middle of the adjacent positive electrode group and negative electrode group. The mesh separator is made of glass fiber material, and the positive electrode group, negative electrode group, and mesh separator together form a porous electrode in the desalination tank. Deionization module; anode pool, desalination pool, cathode pool, raw water tank, anode circulation water tank, cathode circulation water tank, purified water buffer tank to build a water quality circulation process. The invention fundamentally realizes the continuous and stable self-supply of electric adsorption desalination of the system.

Description

Technical field: [0001] The invention relates to oil and gas field produced water treatment technology, how to maintain continuous self-supply, balance system pH, avoid scaling and deformation of ion exchange membranes and electrodes, and realize The technical problem of effectively removing organic matter in produced water while desalinating, specifically relates to a device and method for treating produced water in oil and gas fields by using organic matter degradation to self-supply energy. Background technique: [0002] During the development of oil and gas fields, a large amount of produced water will be produced. In addition to petroleum hydrocarbons and mechanical impurities, high salinity and high chemical oxygen demand are common characteristics of this type of water. In particular, with the development of oilfields entering a period of high water cut and the promotion and application of diversified development methods, the scale of produced water in oilfields is in...

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Problems solved by technology

[0004] The object of the present invention is to provide a device for processing oil and gas field produced water by self-supply of organic matter degradation. This device for processing oil and gas field produced water by self-supply of organic matter degradation is used to solve the problem of increased treatment costs caused by the need for additional energy supply in different degrees in conventional treatment technologies. The requirements for the pretreatment process of produced water are relatively strict, and it is difficult to effectively remove organic matter while reducing the salinity of water quality, especially in response to the anode and anode in the operation of conventional microbial desalination fuel cells in the desalination treatment of produced water from oil and gas fields with high salinity Unbalanced pH value of the chamber, fouling of ion exchange membranes and electrodes, severe deformation, and degradation of organic matter power generation performance by microorganisms lead to unstable self-supply of the system and lack of continuity

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