CN-119503960-B - Particle electrode recovery system and method for wastewater treatment

CN119503960BCN 119503960 BCN119503960 BCN 119503960BCN-119503960-B

Abstract

The embodiment of the invention discloses a particle electrode recovery system and a particle electrode recovery method for wastewater treatment, wherein when wastewater is treated by a wastewater treatment module, a three-dimensional electrode system is formed by a first electrode, a second electrode and a particle electrode in the wastewater in a wastewater container, so that the area of electrochemical reaction is increased, or a series of micro-electrolytic cells are formed, the pollutant removal efficiency is improved, and the particle electrode in the wastewater treated by the wastewater treatment module is separated and recovered by the particle electrode recovery module, so that the waste of the particle electrode is avoided, the recovered particle electrode can be reused, the full utilization of the particle electrode is realized, and the wastewater treatment cost is reduced.

Inventors

ZHOU XINYU
HOU HAITAO
HUANG JIA
WEI XIAOFANG
HAN LU
FENG CHUN
LV WEIFENG
GAO MING
ZHOU MINGHUI
CHEN MO

Assignees

中国石油天然气股份有限公司

Dates

Publication Date: 20260505
Application Date: 20230822

Claims (9)

1. A particle electrode recovery system for wastewater treatment, comprising: The device comprises a wastewater treatment module, a particle electrode and a particle electrode, wherein the wastewater treatment module comprises a wastewater container, a first electrode and a second electrode, the first electrode and the second electrode are arranged in the wastewater container, the first electrode is connected with one of the positive electrode and the negative electrode of a first power supply, and the second electrode is connected with the other one of the positive electrode and the negative electrode of the first power supply; The particle electrode recovery module is communicated with the output port of the wastewater container and is used for separating and recovering particle electrodes in wastewater treated by the wastewater treatment module; The device also comprises an electrochemical oil extraction device and an oil-water separation module; The electrochemical oil extraction device comprises a displacement fluid injection module, a third electrode arranged in an injection well and a fourth electrode arranged in an extraction well, wherein the third electrode and the fourth electrode are respectively connected with the positive electrode and the negative electrode of a second power supply; The displacement fluid injection module is used for conveying displacement fluid into the injection well, the displacement fluid comprises the particle electrode, the production well is communicated with the input port of the oil-water separation module through a production fluid conveying pipeline, and the first output port of the oil-water separation module is communicated with the wastewater conveying pipeline; The oil-water separation module is used for separating oil from water of the produced liquid conveyed by the produced liquid conveying pipeline and conveying the separated wastewater to the wastewater container through the wastewater conveying pipeline; The particle electrode recovery module is communicated with the displacement fluid injection module and is used for conveying the recovered particle electrodes to the displacement fluid injection module.
2. The wastewater treatment particle electrode recovery system of claim 1, wherein the particle electrode is a magnetic particle electrode, and the particle electrode recovery module comprises a magnetic adsorption unit for adsorbing the magnetic particle electrode.
3. The wastewater treatment particle electrode recovery system of claim 1 wherein the displacement fluid injection module comprises a particle electrode vessel in communication with the particle electrode recovery module through a particle electrode recovery line, a displacement fluid vessel in communication with the displacement fluid vessel through a particle electrode transfer line, and a pump set in communication with the pump set through a first displacement fluid transfer line, the pump set in communication with the injection well through a second displacement fluid transfer line.
4. A particle electrode recovery system for wastewater treatment according to claim 3 and wherein said displacement fluid injection module further comprises an injection water reservoir in communication with said displacement fluid reservoir through an injection water transfer line.
5. The wastewater treatment particle electrode recovery system of claim 1, wherein the second output of the oil-water separation module is in communication with a crude oil export line.
6. The particle electrode recovery system for wastewater treatment according to claim 1, further comprising a wastewater output line in communication with the particle electrode recovery module for externally delivering wastewater subjected to particle electrode recovery by the particle electrode recovery module.
7. The particulate electrode recovery system for wastewater treatment of claim 1, wherein the first electrode is adjacent to the input port of the wastewater container relative to the second electrode and the second electrode is adjacent to the output port of the wastewater container relative to the first electrode.
8. The wastewater treatment particle electrode recovery system of any one of claims 1 to 7 wherein the particle electrode comprises an iron-based magnetic particle electrode.
9. A particle electrode recovery method for wastewater treatment, adapted to the particle electrode recovery system for wastewater treatment according to any one of claims 1 to 8, comprising: Applying an electric field between a first electrode and a second electrode of a wastewater container by a first power supply of a wastewater treatment module, wherein the first electrode, the second electrode and a particle electrode in wastewater conveyed by a wastewater conveying pipeline construct a three-dimensional electrode system in the wastewater container; And the particle electrode recovery module is used for separating and recovering the particle electrodes in the wastewater treated by the wastewater treatment module.

Description

Particle electrode recovery system and method for wastewater treatment Technical Field The embodiment of the invention relates to the technical field of wastewater treatment, in particular to a particle electrode recovery system and method for wastewater treatment. Background With the development of wastewater treatment technology, electrochemical treatment methods are widely used. In the prior art, a two-dimensional electrode system is mostly adopted for electrochemical treatment of wastewater, but the two-dimensional electrode has the defects of small surface area, low current efficiency, small unit cell body treatment capacity and the like. Therefore, a three-dimensional electrochemical treatment method is proposed, but the three-dimensional electrochemical flooding produced wastewater contains a large number of particle electrodes, so that the particle electrodes are wasted, and the wastewater treatment cost is high. Disclosure of Invention The invention provides a particle electrode recycling system and method for wastewater treatment, which are used for recycling particle electrodes, realizing full utilization of the particle electrodes and reducing wastewater treatment cost. In a first aspect, an embodiment of the present invention provides a particle electrode recovery system for wastewater treatment, including: The device comprises a wastewater treatment module, a particle electrode and a water treatment module, wherein the wastewater treatment module comprises a wastewater container, a first electrode and a second electrode, the first electrode and the second electrode are arranged in the wastewater container, the first electrode is connected with one of the positive electrode and the negative electrode of a first power supply, and the second electrode is connected with the other one of the positive electrode and the negative electrode of the first power supply; and the particle electrode recovery module is communicated with an output port of the wastewater container and is used for separating and recovering particle electrodes in wastewater treated by the wastewater treatment module. Optionally, the particle electrode is a magnetic particle electrode, and the particle electrode recovery module includes a magnetic adsorption unit, where the magnetic adsorption unit is used for adsorbing the magnetic particle electrode. Optionally, the particle electrode recovery system for wastewater treatment further comprises an electrochemical oil extraction device and an oil-water separation module; The electrochemical oil extraction device comprises a displacement fluid injection module, a third electrode arranged in an injection well and a fourth electrode arranged in an extraction well, wherein the third electrode and the fourth electrode are respectively connected with the positive electrode and the negative electrode of a second power supply; The displacement fluid injection module is used for conveying displacement fluid into the injection well, the displacement fluid comprises a particle electrode, the extraction well is communicated with the input port of the oil-water separation module through an extraction fluid conveying pipeline, and the first output port of the oil-water separation module is communicated with the wastewater conveying pipeline; the oil-water separation module is used for separating oil from water of the produced liquid conveyed by the produced liquid conveying pipeline and conveying separated wastewater to the wastewater container through the wastewater conveying pipeline; The particle electrode recovery module is communicated with the displacement fluid injection module and is used for conveying the recovered particle electrode to the displacement fluid injection module. Optionally, the displacement fluid injection module includes particle electrode container, displacement fluid container and pump package, and particle electrode container and particle electrode recovery module pass through particle electrode recovery pipeline intercommunication, and particle electrode container still passes through particle electrode transfer pipeline and displacement fluid container intercommunication, and the displacement fluid container passes through first displacement fluid transfer pipeline and pump package intercommunication, and the pump package passes through second displacement fluid transfer pipeline and injection well intercommunication. Optionally, the displacement fluid injection module further comprises an injection water container, which is in communication with the displacement fluid container through an injection water transfer line. Optionally, the second output port of the oil-water separation module is communicated with a crude oil output pipeline. Optionally, the particle electrode recovery system for wastewater treatment further comprises a wastewater output pipeline, wherein the wastewater output pipeline is communicated with the particle electrode recovery module and is us