CN212450767U

CN212450767U - Nested electrochemical reaction device for sewage treatment

Info

Publication number: CN212450767U
Application number: CN202020578281.XU
Authority: CN
Inventors: 曾玉彬; 孙鑫格; 吴为; 赵乙凡; 石姝彤
Original assignee: Wuhan University WHU
Current assignee: Wuhan University WHU
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2021-02-02
Anticipated expiration: 2030-04-17

Abstract

Disclosed is a nested electrochemical reaction device for sewage treatment, which can be used for treating oilfield sewage, and comprises: the device comprises an electrocoagulation reactor, an electrocatalysis reactor, a rotating electrode and a driving system for driving the rotating electrode to rotate; the electric flocculation reactor is positioned in the electric catalytic reactor, or the electric catalytic reactor is positioned in the electric flocculation reactor; the electric flocculation reactor is provided with a water inlet, the electric flocculation reactor is in fluid communication with the electric catalytic reactor through a pipeline, and the electric flocculation reactor and the electric catalytic reactor are provided with sludge outflow ports; the rotating electrodes include an anode and a cathode in the electrocoagulation reactor, and an anode and a cathode in the electrocatalytic reactor. The reaction device of the present disclosure performs an electrocoagulation treatment on sewage first, and then performs an electrocatalysis treatment. Can improve the water mass transfer rate, improve the electrochemical reaction efficiency and reduce the energy consumption, the equipment volume and the operation cost.

Description

Nested electrochemical reaction device for sewage treatment

Technical Field

The utility model belongs to the technical field of sewage treatment, concretely relates to novel nested formula electrochemical reaction device, can be used to the processing of oil field sewage.

Background

The process can produce thick oil sewage in the oil exploitation process, and the thick oil sewage has the characteristics of high temperature, serious emulsification, high oil content and suspended matter content, high silicon dioxide and hardness content and the like, and has great treatment difficulty. The treatment and resource utilization of the thick oil sewage at present are the direction of continuous exploration and the goal to be achieved in the sewage treatment in the petroleum development field.

The common treatment methods for industrial wastewater include electrocoagulation and electrocatalysis. The electric flocculation technology is that under the action of a direct current electric field, a soluble anode is utilized to generate metal cations, and the metal cations are hydrolyzed and polymerized to form a flocculating agent, so that pollutants in wastewater are removed. The electric flocculation technology has the characteristics of short reaction time, high treatment efficiency, no need of adding chemical agents and the like. The electrocatalytic oxidation technology is a novel efficient and clean wastewater treatment technology, and is applied to the treatment of organic wastewater difficult to degrade by many domestic and foreign scholars. The electrocatalytic oxidation utilizes a metal oxide electrode with catalytic performance to generate hydroxyl radicals (. OH) or other radicals and radicals with strong oxidizing capability through an electrochemical process to attack organic pollutants in a solution so as to decompose and mineralize the organic pollutants. The electrocatalytic oxidation technology has the advantages of high treatment efficiency, strong environmental adaptability, simple operation, no need of adding chemical agents, no secondary pollution, mild reaction conditions, good controllability, easy realization of automatic control and the like.

The existing sewage treatment device usually only contains one part of electrocatalysis or electrocoagulation, so that the pollutants in the sewage are not completely and thoroughly treated; or some devices set electrocatalysis and electroflocculation into two independent parts, which results in long treatment process, increased reactor volume, more occupied space and more energy consumption.

SUMMERY OF THE UTILITY MODEL

The present disclosure provides a nested electrochemical reaction device for sewage treatment. Firstly, carrying out electric flocculation treatment on the sewage, and then carrying out electrocatalysis treatment. The device can realize uniform water distribution, improve the mass transfer efficiency, shorten the hydraulic retention time, improve the electrochemical reaction efficiency, simplify the design of the reactor, reduce the space used by the reactor, reduce the energy consumption and the operation cost and obviously improve the treatment effect of the reactor.

At least one embodiment of the present disclosure provides a nested electrochemical reaction device for wastewater treatment, comprising: the device comprises an electrocoagulation reactor, an electrocatalysis reactor, a rotating electrode and a driving system for driving the rotating electrode to rotate; the electric flocculation reactor is positioned in the electric catalytic reactor, or the electric catalytic reactor is positioned in the electric flocculation reactor; the electric flocculation reactor is provided with a water inlet, the electric flocculation reactor is in fluid communication with the electric catalytic reactor through a pipeline, and the electric flocculation reactor and the electric catalytic reactor are provided with sludge outflow ports; the rotating electrodes include an anode and a cathode in the electrocoagulation reactor, and an anode and a cathode in the electrocatalytic reactor.

In some examples, the anode and the cathode in the electrocoagulation reactor are an aluminum electrode and a graphite electrode, respectively.

In some examples, the anode and cathode in the electrocatalytic reactor are a titanium rhodium iridium electrode and a graphite electrode, respectively.

In some examples, the electrocoagulation reactor and the electrocatalytic reactor are coupled in a concentric cylinder structure having a top cover.

In some examples, the drive system includes a motor on the top cover, the motor coupled to the rotating electrode by a coupling through a hole in the center of the top cover.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly described below.

Fig. 1 is a schematic structural view of a nested electrochemical reaction device for sewage treatment according to an embodiment of the present disclosure.

Detailed Description

The nested electrochemical reaction device 1 for sewage treatment is a concentric cylinder structure, wherein the inner layer can be an electric flocculation reactor, the outer layer 9 can be an electric catalytic reactor, the concentric cylinder structure is not equal in height, and the height of the inner layer cylinder is higher than that of the outer layer 9 cylinder. It is to be noted that the electrocoagulation reactor may also be in the outer layer 9, with the electrocatalytic reactor in the inner layer. The electric flocculation reactor and the electric catalysis reactor are communicated through a pipeline 8, a water inlet 10 is arranged on the electric flocculation reactor, and a sludge outflow port 11 is arranged on the electric flocculation reactor and the electric catalysis reactor.

The nested electrochemical reaction device for sewage treatment 1 is internally provided with a rotating electrode 3, the rotating electrode 3 is driven by a motor 6 to rotate, the motor 6 is arranged on a top cover 2 of the reaction device 1, and the motor 6 is connected with the rotating electrode 3 by a coupler 4. The rotating electrode 3 is connected to a dc power supply 5 via a slip ring 7. The rotating electrodes 3 comprise an anode and a cathode in the electrocoagulation reactor, and an anode and a cathode in the electrocatalytic reactor. The anode and the cathode in the electric flocculation reactor are respectively an aluminum electrode and a graphite electrode. The anode and the cathode in the electro-catalytic reactor are respectively a titanium rhodium iridium electrode and a graphite electrode.

In the sewage treatment process, sewage firstly enters the electric flocculation reactor through the water inlet 10 to be subjected to electric flocculation treatment, and most suspended matters in the sewage are removed through electrolysis and adsorption, so that the purpose of primary purification of the sewage is achieved. The sewage which is primarily purified flows into the electro-catalytic reactor from a pipeline 8 at the upper part of the electro-flocculation reactor, and is subjected to electro-catalytic treatment, organic substances in the sewage are oxidized and removed, and the sewage is further purified. The treated water flows out through a drain port on the electrocatalytic reactor and is collected.

After the sewage is treated by the electric flocculation and the electric catalysis, the sewage is precipitated and is discharged from the sludge discharge port 11 by the electric flocculation reactor and the sludge at the bottom of the electric catalysis reactor, the sludge discharge port 11 is connected with a sludge discharge pipe, a valve is arranged on the sludge discharge pipe, and the valve is opened to discharge sludge when the sludge is required to be regularly discharged.

Claims

1. A nested electrochemical reaction device for sewage treatment is characterized by comprising: the device comprises an electrocoagulation reactor, an electrocatalysis reactor, a rotating electrode and a driving system for driving the rotating electrode to rotate; the electric flocculation reactor is positioned in the electric catalytic reactor, or the electric catalytic reactor is positioned in the electric flocculation reactor; the electric flocculation reactor is provided with a water inlet, the electric flocculation reactor is in fluid communication with the electric catalytic reactor through a pipeline, and the electric flocculation reactor and the electric catalytic reactor are provided with sludge outflow ports; the rotating electrodes include an anode and a cathode in the electrocoagulation reactor, and an anode and a cathode in the electrocatalytic reactor.

2. The nested electrochemical reaction device for wastewater treatment of claim 1, wherein the anode and the cathode in the electrocoagulation reactor are an aluminum electrode and a graphite electrode, respectively.

3. The nested electrochemical reaction device for wastewater treatment of claim 1, wherein the anode and cathode in the electrocatalytic reactor are titanium rhodium iridium electrode and graphite electrode, respectively.

4. The nested electrochemical reaction device for wastewater treatment of claim 1, wherein the electrocoagulation reactor and the electrocatalytic reactor are coupled in a concentric cylinder structure having a top cover.

5. The nested electrochemical reaction device for wastewater treatment of claim 4, wherein the drive system comprises a motor on the top cover, the motor passing through a hole at the center of the top cover, and being connected together by a coupling and the rotating electrode.