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Screen plunger piston flow electrolyzing device and method for treating organic wastewater

An electrolysis device, a technology for organic wastewater, applied in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem of large difference in current density distribution, difficulty in making active electrodes, and high aspect ratio. Structural limitations and other problems, to achieve continuous and stable process, small electrode spacing, and good mass transfer.

Active Publication Date: 2013-07-31
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrodes of the existing plug flow (or tubular) electrochemical reactors are arranged in parallel with the water flow direction, limited by the high aspect ratio structure of the reactor (usually, L / D=50:1), the supporting electrodes (including the anode and cathode) need to be in the shape of a long strip (tube), the active electrode is difficult to manufacture, and the cylindrical electrode also has the defect that the area of ​​the cylindrical electrode is different, resulting in a large difference in the current density distribution. application

Method used

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  • Screen plunger piston flow electrolyzing device and method for treating organic wastewater
  • Screen plunger piston flow electrolyzing device and method for treating organic wastewater
  • Screen plunger piston flow electrolyzing device and method for treating organic wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The key point of the invention is a net plate plunger flow electrolysis device, which has universality for different organic waste water. EXAMPLES Experiments were carried out with two types of representative actual industrial organic wastewater.

[0022] The stencil plug flow electrolysis device is as follows:

[0023] For the structure of the mesh plate plug flow electrolysis device, see figure 1 , the electrolytic cell comprises an electrolytic cell body 4, an inlet area 1, and an outlet area 5, and an anode 2 and a cathode 3 are arranged in the electrolytic cell body, and the cathode and the anode are respectively connected with the cathode and anode wires of a DC steady-current power supply, so The body of the electrolytic cell is a tubular electrolytic cell, the cathode and anode electrodes are a mesh structure, and the anode is a mesh Ti / PbO 2 The electrode, the cathode is a mesh lead plate electrode with a mesh size of 5.0×12.5mm. The anodes and cathodes are ...

Embodiment 2

[0026] The actual ink wastewater of an enterprise was treated by the screen plug flow electrolysis device of Example 1 respectively.

[0027] Utilize the tubular packed bed electrolysis device of the present invention to implement 1 to process the scheme and working principle of organic waste water as: when the waste water of processing is actual ink waste water, COD Cr 800~1000mg / L, chromaticity 6000 times, pH8.0~9.0. The waste water enters the electrolysis reaction area from the inlet pump through one end of the electrolytic cell through the inlet of the water flow distribution area, and the current density in the cell is 10mA / cm 2 , voltage 5V, water phase temperature and electrolysis at normal temperature, control the flow velocity in the organic wastewater pipe to 1.0, 2.0m / h, and keep the residence time of organic wastewater in the screen plunger flow electrolysis device at 30, 60min. During this period, the organic wastewater is electrolysis time. The treated waste wa...

Embodiment 3

[0036] Utilize the stencil plunger flow electrolysis device of Embodiment 1 of the present invention to deeply treat the biochemical water outlet scheme and working principle of a certain dyestuff enterprise: organic wastewater COD C 500~600mg / L, chroma 250~300 times, pH 6.0~7.0. Wastewater enters the electrolysis reaction area from the inlet pump through one end of the electrolytic cell through the inlet of the water flow distribution area, and the voltage and current density in the cell is 10mA / cm 2, 3V (the wastewater has a high conductivity), and the water phase temperature is electrolyzed under normal temperature conditions, the flow velocity in the organic wastewater pipe is controlled to be 1.0, 2.0m / h, and the retention time of the organic wastewater in the tubular packed bed electrolysis device is kept at 30, 60min, which is The period of time is the electrolysis time of organic wastewater. The treated waste water is discharged through the other end of the electrolyz...

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Abstract

The invention provides a screen plunger piston flow electrolyzing device and a method for treating organic wastewater. The screen plunger piston flow electrolyzing device mainly comprises a tank body of an electrolyzing tank; two ends of the tank body are respectively provided with a water flow inlet region and a water flow outlet region; the tank body is internally provided with cathodes and anodes; the cathodes and the anodes are of screen-type structures and are placed along the direction of the cross section of the tank body; when the device operates, water flow passes through a cathode plate and an anode plate; each anode is a net-shaped titanium-based plated metal oxide electrode plate and each cathode is a net-shaped lead or stainless steel electrode plate; a plurality of cathodes and anodes are alternately and uniformly distributed in the tank body; and the quantity of cathodes is one more than that of anodes. The screen plunger piston flow electrolyzing device and the method for treating the organic wastewater, disclosed by the invention, have the main beneficial effects that: (1) the device is small in size, gaps among the electrodes is small and the power consumption islow; (2) the flow direction of the wastewater is vertical to an electrode surface and the process is continuous and stable; (3) other novel screen active electrodes can be adopted and have higher catalytic activity; and (4) the mass transferring performance is good and the electrolyzing efficiency is high.

Description

(1) Technical field [0001] The invention relates to a screen plug flow electrolysis device and a method for treating organic waste water by using the device. (2) Background technology [0002] Industrial organic wastewater treatment has always been a difficult problem in the field of water pollution control. Electrolysis is an effective method to remove toxic and harmful substances in industrial wastewater, and has been widely researched and applied in pharmaceutical, chemical, printing and dyeing industries. In the plunger flow (also known as tubular or push flow) electrochemical reactor, the fluid volume element flowing through the reactor moves in a piston-like manner, and the front and rear volume elements do not back-mix, and the reaction time of the material composition in each volume element is the same. , which can achieve the maximum conversion rate of pollutants per unit energy consumption. The electrodes of the existing plug flow (or tubular) electrochemical rea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461C02F101/30
Inventor 王家德陈飞翔杨初引甘永平陈建孟
Owner ZHEJIANG UNIV OF TECH
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