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Method for solving scaling of electrochemical cathode

An electrochemical and cathode technology, which is applied in the field of electrochemical cathode scaling, can solve problems such as insufficient backwashing strength, gas distribution hysteresis, particle electrode hardening, etc., and achieve the effect of solving the problem of cathode scaling

Inactive Publication Date: 2021-01-29
UNIV OF JINAN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention proposes a method for solving cathode fouling, so as to solve a series of problems caused by cathode fouling, such as reactor clogging, low current efficiency or particle electrode hardening, etc., and also increase gas distribution hysteresis and gas distribution during backwashing Insufficient local backwashing intensity leads to a series of operation and management problems such as filter material compaction, high operating pressure, and poor water flow

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  • Method for solving scaling of electrochemical cathode
  • Method for solving scaling of electrochemical cathode
  • Method for solving scaling of electrochemical cathode

Examples

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Embodiment example 1

[0021] as attached figure 1 The horizontally arranged three-dimensional electric Fenton reactor is shown: sewage and waste water enters from the water inlet (1), and the water inlet is accompanied by an aeration device (2), and flows upward through the supporting layer (3) before entering the three-dimensional electric reactor. The main part of the Fenton reactor: the granular electrode (4) becomes a micro-electrode under the action of the electrode plate (5) (6), which effectively improves the removal rate of organic matter. However, in the process of backwashing, fouling on the cathode plate leads to blockage of the reactor, low current efficiency, and hardening of the particle electrode. Using the solution proposed by the present invention, the current commutator (8) is used to exchange the cathode and anode during backwashing, and the reactor is air-washed for 5-8 minutes; gas-water combined flushing is 7-10 minutes; water washing is 8-10 minutes, Finally, exchange the ca...

Embodiment example 2

[0023] as attached figure 2 The vertically arranged three-dimensional electrochemical biological filter shown in the filter: the sewage enters the water from the water inlet (1), flows upward through the supporting layer (2) and then enters the main part of the electrochemical aerated biological filter: granular biological The filter material (4) becomes micro-electrodes under the action of the electrode plate (5), effectively improving the removal rate of refractory biodegradable organic matter. However, in the process of backwashing, due to scaling on the cathode plate, water distribution and gas distribution are often uneven, and the backwashing intensity in local areas is too large, often causing hysteresis in water distribution. The strength far exceeds the design strength, while the distribution of water and air in other areas has obvious hysteresis and the strength is extremely uneven. Using the backwashing method proposed by the present invention, the current commuta...

Embodiment example 3

[0025] as attached image 3 Shown ring-shaped enlarged anode electrochemical biological filter, the top view of the reactor is as attached Figure 4 Shown: Sewage and waste water enters from the water inlet (1), accompanied by an aeration device (2), flows upward through the supporting layer (3) and then enters the main part of the electrochemical aerated biological filter: granular organisms The filter material (4) becomes microelectrodes under the action of the electrode plates (5) (6), which effectively improves the removal rate of refractory biodegradable organic matter. However, during the backwashing process, the scale on the central cathode column leads to excessive deposition to the bottom of the reactor, resulting in problems such as reactor blockage, low current efficiency, particle electrode compaction, and mixed bed of the support layer and the filter layer. Using the solution proposed by the present invention, the current commutator (8) is used to exchange the ca...

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Abstract

The invention provides a method for solving cathode scaling, and aims to solve the phenomenon of cathode scaling in an electro-catalysis process, a series of problems such as reactor blockage, low current efficiency or particle electrode hardening and the like caused by the cathode scaling, and a series of operation management problems of filter material hardening, high operation pressure, unsmooth water passing and like caused by insufficient local backwashing strength due to gas distribution hysteresis and non-uniform gas distribution in backwashing process. In order to solve the problems, the invention provides the method for solving cathode scaling. A large number of experimental phenomena prove that after a reactor which is used for a long time uses the backwashing method provided bythe invention, scaling substances on the surface of the cathode are obviously reduced, and after a newly built reactor uses the backwashing method provided by the invention, no obvious cathode scalingsubstance is deposited.

Description

technical field [0001] The patent of the present invention solves the scaling phenomenon of electrochemical cathodes. It can be used in the advanced treatment unit of the sewage treatment plant. Background technique [0002] The electrochemical process is under the action of an external electric field, in the electrochemical reactor, through chemical reactions, electrochemical processes or physical processes, a large number of free radicals are generated, and the pollutants in the sewage and wastewater are treated by using the strong oxidation characteristics of the free radicals. degradation. Pollutants are reduced or removed by direct electrochemical reaction or indirect electrochemical conversion on the electrode. Electrochemical water treatment technology has been widely used in the treatment of wastewater produced in chemical, dye, biopharmaceutical and other industries. Due to the complexity of organic wastewater, it is impossible to completely remove refractory sub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461
CPCC02F1/46104C02F2303/14
Inventor 冯岩卢玉玉吴心玥周海琳任昊成于海峰
Owner UNIV OF JINAN