An electrochemical membrane, preparation method and reaction device suitable for treating concentrated brine

A reaction device and electrochemical technology, applied in the field of electrochemical membrane reaction devices, can solve the problems of low organic matter removal efficiency and low electrode activity, and achieve improved electrochemical oxidation efficiency, high electrochemical oxidation activity, and electroactive specific surface area. big effect

Active Publication Date: 2020-12-15
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem of low organic matter removal efficiency due to mass transfer limitation and low activity of commonly used electrodes in the electrochemical oxidation process, the present invention proposes an electrochemical membrane suitable for treating concentrated brine, which is characterized in that it is a ring Tubular porous ceramic membrane, including a substrate tube made of TiO2 and Ti4O7 and Ti2O3-based mixed crystals covering the surface and pores of the substrate tube

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  • An electrochemical membrane, preparation method and reaction device suitable for treating concentrated brine
  • An electrochemical membrane, preparation method and reaction device suitable for treating concentrated brine
  • An electrochemical membrane, preparation method and reaction device suitable for treating concentrated brine

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Embodiment 1

[0046] The structure of the ring-tubular titanium mixed crystal porous ceramic membrane in this embodiment is: the substrate tube and the Ti layer covering the surface and pores of the substrate tube 4 o 7 and Ti 2 o 3 Base mixed crystal composition, the material of the base tube is TiO 2 , the base pipe is a porous structure with a porosity of 60%, a length of 1m, a wall thickness of 3mm, and a specific surface area of ​​4m 2 g -1 .

[0047] The preparation method of the annular tubular titanium mixed crystal porous ceramic membrane and the assembly method of the electrochemical membrane reaction device in this embodiment include the following steps:

[0048] 1. Put TiO 2 The ceramic membrane adopts high temperature H 2 A titanium oxide porous ceramic membrane with electrochemical reactivity was prepared by reduction; the high temperature environment was 900°C, and the hydrogen flow rate was 200mL min -1 , the reduction time is 6h.

[0049] 2. The titanium suboxide c...

Embodiment 2

[0056] The structure of the ring-tubular titanium mixed crystal porous ceramic membrane in this embodiment is: the substrate tube and the Ti layer covering the surface and pores of the substrate tube 4 o 7 and Ti 2 o 3 Base mixed crystal composition, the material of the base tube is TiO 2 , the base pipe is a porous structure with a porosity of 70%, a length of 2m, a wall thickness of 4mm, and a specific surface area of ​​5m 2 g -1 .

[0057] The preparation method of the annular tubular titanium mixed crystal porous ceramic membrane and the assembly method of the electrochemical membrane reaction device in this embodiment include the following steps:

[0058] 1. Put TiO 2 The ceramic membrane adopts high temperature H 2 A titanium oxide porous ceramic membrane with electrochemical reactivity was prepared by reduction; the high temperature environment was 1000°C, and the hydrogen flow rate was 300mL min -1 , the reduction time is 8h.

[0059] 2. The titanium suboxide ...

Embodiment 3

[0066] The structure of the ring-tubular titanium mixed crystal porous ceramic membrane in this embodiment is: the substrate tube and the Ti layer covering the surface and pores of the substrate tube 4 o 7 and Ti 2 o 3 Base mixed crystal composition, the material of the base tube is TiO 2 , the base pipe is a porous structure with a porosity of 80%, a length of 3m, a wall thickness of 6mm, and a specific surface area of ​​6m 2 g -1 .

[0067] The preparation method of the annular tubular titanium mixed crystal porous ceramic membrane and the assembly method of the electrochemical membrane reaction device in this embodiment include the following steps:

[0068] 1. Put TiO 2 The ceramic membrane adopts high temperature H 2 A titanium oxide porous ceramic membrane with electrochemical reactivity was prepared by reduction; the high temperature environment was 1200°C, and the hydrogen flow rate was 400mL min -1 , the reduction time is 10h.

[0069] 2. The titanium suboxide...

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Abstract

The invention discloses an electrochemical membrane suitable for treating strong brine, a preparation method of the electrochemical membrane and a reaction apparatus. The electrochemical membrane is an annular pipe-like porous ceramic membrane and comprises a matrix pipe made from TiO2 and Ti4O7-and-Ti2O3-based mixed crystal covering the surface and pores of the matrix pipe. The electrochemical membrane reaction apparatus has preferable hydroxyl radical stimulating activity and active chlorine substance precipitating activity and can enhance the mass transfer of reactants on the surfaces of electrodes in a membrane filtration manner. The effect of removing organic matters from water via electrochemical oxidation is improved, and the electrochemical membrane is particularly suitable for treating waste water with a relatively high chloride ion concentration.

Description

technical field [0001] The invention belongs to the field of water treatment technology and environmental functional materials. In particular, it relates to an electrochemical membrane reaction device suitable for treating concentrated brine. Background technique [0002] Coal chemical concentrated brine is a typical high-concentration refractory toxic and harmful industrial wastewater. The salt content is more than 10000mg / L, and the COD is more than 200mg / L. The water quality is complex and difficult to deal with. High concentrations of organic matter make evaporation and crystallization difficult, and the quality of crystallized salt is poor, making it difficult to recycle. Crystallized salt is expensive to treat as hazardous waste (about 3,000-400 yuan / t). It is very necessary to reduce the concentration of organic matter before evaporation and crystallization. [0003] The biodegradability of concentrated brine in coal chemical industry is poor, and it is difficult to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/02B01D67/00B01D69/04C02F1/467C02F101/12C02F101/30
CPCB01D67/0044B01D67/0076B01D69/046B01D71/024B01D2325/26C02F1/4672C02F2101/12C02F2101/30
Inventor 王建兵汪东亮秦强周昊王春荣张春晖何绪文
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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