Electro-catalytic membrane reactor device

An electrocatalytic membrane and reactor technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of poor stability, anode dissolution, secondary pollution operation stability, etc. High efficiency and improved electrocatalytic activity

Inactive Publication Date: 2009-12-09
大连华鑫源科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the device uses metal materials such as stainless steel, copper, etc. as the anode, which is prone to anode dissolution, resulting in secondary pollution and p...

Method used

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  • Electro-catalytic membrane reactor device
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Experimental program
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Embodiment 1

[0022] The feed liquid of the electrocatalytic membrane reactor is 3L of 100ppm simulated oily wastewater. The electrocatalytic composite membrane is used as the anode (the original membrane pore size is 0.6μm, the porosity is 41%), the stainless steel electrode is the cathode, and the effective area of ​​the electrode is 20.6cm 2 , The electrode spacing is 14mm, the voltage is 4V, the current is 0.20-0.25A, the electrolyte concentration is 10g / l, and the pH is 4, press figure 1 Connect the device to adjust the transmembrane pressure difference to 0.025MPa. Experimental results: the initial water flux of the composite membrane is 110L / m 2 hbar, the interception rate of oily wastewater is 90%; after 4 hours of membrane fouling operation experiment, the membrane flux drops to 25% without electrocatalysis, while the membrane flux is basically unchanged with online electrocatalysis.

Embodiment 2

[0024] The feed liquid of the electrocatalytic membrane reactor is 2L of 200ppm simulated oily wastewater. The electrocatalytic composite membrane is used as the anode (the original membrane pore size is 0.4μm, the porosity is 37%), the stainless steel electrode is the cathode, and the effective area of ​​the electrode is 15.4cm 2 , The electrode spacing is 14mm, the voltage is 3V, the current is 0.10-0.15A, the electrolyte concentration is 10g / l, and the pH value is 7, press figure 1 Connect the device to adjust the transmembrane pressure difference to 0.01MPa. Experimental results: the initial water flux of the composite membrane is 156L / m 2 hbar, the rejection rate of oily wastewater is 91%; under the same conditions of other operating parameters, the membrane flux when the electrocatalytic composite membrane reactor is used to treat wastewater is 75% higher than the flux in the single membrane separation treatment.

Embodiment 3

[0026] The electrocatalytic composite film is used as the anode, the stainless steel electrodes with different diameters are used as the cathode, and the effective area of ​​the electrode is 20cm 2 In the electrocatalytic membrane reactor, the influence of various operating parameters such as electrolyte concentration, voltage, pH value, and electrode spacing on the electrochemical performance of the reactor was studied. The experimental factors and levels are shown in Table 1. By investigating the removal rate of pollutants under different conditions, the results and analysis are shown in Table 2, and the optimal operating parameters of the membrane reactor are obtained: electrolyte concentration 15g / l, voltage 4V, electrode spacing 39mm, pH value 7. And through the range analysis, it is concluded that the primary and secondary order of the influence of each parameter on the pollutant removal rate is pH, voltage, electrolyte concentration, and electrode spacing.

[0027] Table 1

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Abstract

The invention describes an electro-catalytic membrane reactor device, which is characterized in that the device can couple the membrane separation technology and electro-catalysis technology for wastewater treatment, thereby solving the problem of membrane pollution and realizing self-cleaning function of the membrane. The reactor device comprises a feed liquid tank, an electro-catalytic composite membrane, an auxiliary electrode, a regulated power supply, a vacuum gauge, a peristaltic pump and the like; wherein, the electro-catalytic composite membrane is a novel membrane material prepared by taking a microporous carbon membrane as a matrix and a metal or metallic oxide as a catalytic coating layer; one end of the electro-catalytic membrane is closed and the other end thereof is connected with the peristaltic pump through a pipeline; the pump continuously supplies negative pressure so that the feed liquid permeates a separation membrane and seeps from outside to inside along the pipeline; meanwhile, the electro-catalytic composite membrane is taken as the anode and the auxiliary electrode is taken as the cathode; the electro-catalytic composite membrane and the auxiliary electrode are respectively connected with the regulated power supply by leads to form an electrolysis device. By applying voltage to the composite membrane in the process of membrane separation, the organic pollutants deposited on and adhered to the surface and holes of the membrane are electrolytically oxidized to realize antipollution of the membrane. The reactor device has the advantages of simple device, convenient operation, high efficiency, small energy consumption and the like, and can be widely used for treatment and reuse of such industrial wastewater as oily wastewater, dye wastewater, papermaking wastewater and the like.

Description

Technical field [0001] The present invention relates to the field of electrochemical catalysis technology and membrane technology. Specifically, it is to design an electrocatalytic membrane reactor device, which couples membrane separation technology and electrocatalysis technology for wastewater treatment, effectively solves the problem of membrane pollution, and realizes membrane self-regulation. Cleaning function. It can be widely used in the treatment and reuse of industrial wastewater such as oily wastewater, dye wastewater, and papermaking wastewater. The main international patent classification number is proposed to be Int.Cl.B01D71 / 02. Background technique [0002] Membrane separation, as a new type of high-efficiency, energy-saving and environment-friendly separation technology, has become a key technology to solve major problems facing my country, such as energy, resources and environment. In 1995, "Water Treatment" (Water Treatment) Volume 10, pages 135-144, Simms et a...

Claims

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Application Information

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IPC IPC(8): C02F1/44C02F1/461B01D71/02
CPCY02W10/37
Inventor 李建新梁小平杨阳王同华余建国
Owner 大连华鑫源科技发展有限公司
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