CN-121990649-A - Overcurrent type electrochemical reactor

CN121990649ACN 121990649 ACN121990649 ACN 121990649ACN-121990649-A

Abstract

The invention relates to an overcurrent type electrochemical reactor, which belongs to the technical field of electrochemical oxidation and comprises a reaction cavity, an outer cover plate, at least one group of electrode reaction units, an anode grid plate, a cathode grid plate, an anode plate array and a cathode plate array, wherein the reaction cavity is provided with a medium inlet and a medium outlet, the outer cover plate is connected to an opening of the reaction cavity in a sealing mode, the electrode reaction units are arranged in the reaction cavity and comprise the anode grid plate and the cathode grid plate which are arranged in parallel and opposite to each other, the anode plate array and the cathode plate array are arranged between the anode grid plate and the cathode grid plate, and the anode plate array and the cathode plate array are arranged in a staggered and parallel equidistant mode. The invention has the characteristics of simple structure, compact structure, light weight and large contact area between the anode and the conductive part, and can solve the problems of complex structure, high processing cost of non-standard parts and poor contact between the anode and the conductive part of the traditional reactor.

Inventors

HUANG NAN
HU TIANWEN
YANG YUHUA
SONG HAOZHE
ZHAI CHAOFENG
LIU LUSHENG

Assignees

中国科学院金属研究所

Dates

Publication Date: 20260508
Application Date: 20260324

Claims (10)

1. An over-current type electrochemical reactor, characterized by comprising the following steps: the reaction cavity is provided with a medium inlet and a medium outlet; The outer cover plate is connected to the opening of the reaction cavity in a sealing way; At least one group of electrode reaction units arranged in the reaction cavity; The electrode reaction unit comprises an anode grating plate, a cathode grating plate, an anode plate array and a cathode plate array, wherein the anode grating plate and the cathode grating plate are arranged in parallel and opposite to each other, the anode plate array and the cathode plate array are arranged between the anode grating plate and the cathode grating plate, and the anode plate array and the cathode plate array are staggered and are arranged in parallel and equidistantly.
2. The overcurrent electrochemical reactor of claim 1, wherein the reaction chamber is made of fiber reinforced polypropylene and is formed by processing a plate material through an ultrasonic welding process, reinforcing ribs are arranged outside the reaction chamber, and a guide plate is arranged at the medium inlet end inside the reaction chamber.
3. The overcurrent electrochemical reactor of claim 1, wherein the electrode reaction unit further comprises: The anode conducting bars are arranged on the anode grid plates and are electrically connected with each anode plate in the anode plate array; the cathode conducting bars are arranged on the cathode grid plates and are electrically connected with each cathode plate in the cathode plate array; The anode bus plate is arranged on one side of the anode grid plate, which is away from the cathode grid plate, and is attached to the surface of the anode conductive strip to be electrically connected; The cathode bus plate is arranged on one side of the cathode grid plate, which is away from the anode grid plate, and is attached to the surface of the cathode conducting strip to be electrically connected; the anode binding post is connected with the anode bus plate and extends to the outside of the reaction cavity; And the cathode binding post is connected with the cathode bus plate and extends to the outside of the reaction cavity.
4. The overcurrent electrochemical reactor of claim 3, wherein the rectangular grooves for mounting the conductive strips and the groove-type grids for mounting the electrode plate array are formed in the anode grid plate and the cathode grid plate, and the anode grid plate and the cathode grid plate are fixedly connected through connecting pieces to form a frame structure.
5. The overcurrent electrochemical reactor of claim 3, wherein the anode and cathode conductive strips are provided with grooves for inserting the electrode plates, and threaded holes for tightening the electrode plates by jackscrews are formed in the sides of the anode and cathode conductive strips.
6. An overcurrent electrochemical reactor according to claim 3, wherein the anode and cathode bus plates are connected to the corresponding grid plates by fasteners, respectively, and the surfaces of the bus plates are brought into close contact with the surfaces of the conductive bars to form surface contact.
7. The overcurrent electrochemical reactor of claim 3, wherein the anode binding post and the cathode binding post are flat conductive bolts, conical sealing rubber gaskets are arranged between the flat conductive bolts and the outer cover plate or the reaction cavity, one end of each flat conductive bolt is welded with the bus plate, and the flat position of the other end of each flat conductive bolt is connected with a copper bar.
8. The overcurrent electrochemical reactor of claim 1, wherein the anode plate is made of boron-doped diamond electrode or dimensionally stable anode electrode, and the cathode plate is made of titanium metal or boron-doped diamond electrode.
9. The overcurrent electrochemical reactor according to claim 8, wherein when the cathode plate is made of titanium, the surface roughness Ra of the cathode plate is 0.4-0.8 μm, and when the cathode plate is made of boron doped diamond, the cathode plate is operated as an anode by switching the current direction, so that the scale layer on the surface of the electrode is removed.
10. The overcurrent electrochemical reactor of claim 1, wherein more than two groups of electrode reaction units are arranged in the reaction cavity along the water flow direction, and the electrode reaction units are connected in parallel or in series through copper bars.

Description

Overcurrent type electrochemical reactor Technical Field The invention belongs to the technical field of electrochemical oxidation, and particularly relates to an overcurrent type electrochemical reactor. Background The electrochemical advanced oxidation technology is an environment-friendly water treatment technology, and the basic principle is that under the action of an external electric field, a hydroxyl radical (OH) which is a strong oxidizing substance is generated on the surface of an anode, and organic pollutants which are difficult to degrade are mineralized into substances such as carbon dioxide, water and the like on the surface of the anode, so that the purification of wastewater is realized. Among the anode materials, a boron-doped diamond (BDD) electrode is considered to be the high-performance anode material with the most application potential at present because of extremely high oxygen evolution overpotential, wide electrochemical window, extremely low background current, excellent physicochemical stability and pollution resistance, and can efficiently degrade various persistent organic pollutants. However, the existing electrochemical reactor using BDD electrodes still has the following drawbacks in structural design and practical application: First, the structure of the existing reactors is often complex and costly to manufacture. In order to achieve reliable sealing, insulation and conductive connection, the traditional design often adopts complex mechanical clamping and fastening structures, so that the number of installation components is large, non-standard customized parts are large, the whole reactor is heavy, and the material processing and manufacturing cost is remarkably increased. Secondly, BDD electrodes are mostly made of brittle materials such as silicon and the like as substrates, and are sensitive to mechanical stress. The existing design usually adopts a mode of clamping the electrode by a conductive metal sheet, if the clamping force is uneven or overlarge, the electrode is easily caused to generate stress concentration to generate fragmentation, and the stable operation of the reactor is influenced. Meanwhile, the effective contact area of the clamping connection is smaller, the contact resistance is higher, and under the condition of high-current density operation, local overheating is easy to occur at the connection part, so that energy loss is caused, potential safety hazards are possibly caused, and the continuous and efficient implementation of electrochemical reaction is not facilitated. In addition, the sealing structure of the existing reactor is complex, the use amount of the fluororubber sealing element is large, the installation and the disassembly are inconvenient, the electrode replacement is difficult, and the inconvenience is brought to the field maintenance. Meanwhile, the reactor structure lacks flexibility, and the electrode units are difficult to expand or adjust according to the actual processing scale, so that the adaptability of the reactor in different application scenes is limited. In view of the foregoing, the existing electrochemical advanced oxidation reactor needs to be improved in terms of simplified structure, cost control, electrode protection, conductive reliability, and maintenance convenience, and the like, and development of an overcurrent electrochemical reactor which has a simple structure, low cost, easy maintenance and is suitable for high-performance electrode materials is needed. Disclosure of Invention Aiming at the defects existing in the prior art, the invention provides an overcurrent electrochemical reactor which has the characteristics of simple structure, compact structure, light weight and large contact area between an anode and a conductive part, thereby solving the problems of complex structure, high processing cost of non-standard parts and poor contact between the anode and the conductive part of the existing reactor. An overcurrent electrochemical reactor comprising: the reaction cavity is provided with a medium inlet and a medium outlet; The outer cover plate is connected to the opening of the reaction cavity in a sealing way; At least one group of electrode reaction units arranged in the reaction cavity; The electrode reaction unit comprises an anode grating plate, a cathode grating plate, an anode plate array and a cathode plate array, wherein the anode grating plate and the cathode grating plate are arranged in parallel and opposite to each other, the anode plate array and the cathode plate array are arranged between the anode grating plate and the cathode grating plate, and the anode plate array and the cathode plate array are staggered and are arranged in parallel and equidistantly. The reaction cavity is made of fiber reinforced polypropylene and is formed by processing a plate through an ultrasonic welding process, reinforcing ribs are arranged outside the reaction cavity, and a guide plate is arranged at the m