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Ozone catalytic oxidation ceramic membrane catalyst, preparation method thereof, ceramic membrane catalytic reactor and wastewater treatment process

An ozone catalytic oxidation and catalytic reactor technology, applied in catalyst activation/preparation, oxidized water/sewage treatment, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of low utilization rate of active sites inside the catalyst , The average diameter of bubbles is large, preventing ozone oxidation and other problems

Active Publication Date: 2020-08-14
HENAN ACADEMY OF SCI CHEM RES INST CO LTD
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Problems solved by technology

Although the ozone oxidation method has many advantages, under the current conditions, there are still some problems in the treatment of wastewater by using the ozone oxidation technology alone: ​​on the one hand, the reaction selectivity between ozone and organic matter is relatively strong, and it is impossible for ozone to Complete mineralization of pollutants, and the intermediate products generated by decomposition will prevent further oxidation of ozone, in addition, the utilization rate of ozone is low
In practical applications, for the existing catalysts supported by alumina balls, activated carbon, ceramsite, etc., the reactants mainly rely on diffusion to contact the active sites of the catalyst, which results in the utilization of the active sites on the catalyst surface. High, while the utilization rate of active sites inside the catalyst is very low
Moreover, in the aeration process, the traditional aeration method has problems such as uneven aeration, large average diameter of bubbles, and low ozone transfer efficiency.

Method used

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  • Ozone catalytic oxidation ceramic membrane catalyst, preparation method thereof, ceramic membrane catalytic reactor and wastewater treatment process
  • Ozone catalytic oxidation ceramic membrane catalyst, preparation method thereof, ceramic membrane catalytic reactor and wastewater treatment process
  • Ozone catalytic oxidation ceramic membrane catalyst, preparation method thereof, ceramic membrane catalytic reactor and wastewater treatment process

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preparation example Construction

[0043] The present invention also provides a preparation method of an ozone catalytic oxidation ceramic membrane catalyst, comprising the following steps:

[0044] Immerse and precipitate the ceramic membrane with a membrane pore size of 0.01-10 μm in a metal salt solution, take it out, dry it, and roast it in an air atmosphere to obtain an ozone catalytic oxidation ceramic membrane catalyst;

[0045] The metal salt solution is a salt solution of one or more of iron, manganese, zinc, copper, nickel, cobalt, ruthenium, rhodium and lanthanum.

[0046] In the present invention, the structure of the ceramic membrane is the same as that of the ceramic membrane described above, and will not be repeated here.

[0047] In the present invention, the metal salt solution is preferably a salt solution of one or more of iron, manganese, zinc, copper, nickel, cobalt, ruthenium, rhodium and lanthanum, more preferably a nitrate solution of the above metals, Such as one or more of iron nitrat...

Embodiment 1

[0066] The degradation purification treatment of embodiment 1 acrylic acid waste water

[0067] A ceramic membrane with a honeycomb structure with a pore size of 100nm-10μm is used as the catalyst carrier. The structure is as follows: image 3 As shown, using the impregnation method, the ceramic membrane was immersed in a solution of copper nitrate and ferric nitrate with a concentration of 0.5mol / L for 12 hours, and then baked at 500°C for 6 hours after precipitation and drying to obtain an ozone catalytic oxidation ceramic membrane catalyst.

[0068] The above-mentioned ozone catalytic oxidation ceramic membrane catalyst is sealed with a sealed shell to obtain figure 1 The ceramic membrane catalytic reactor in the figure 2 The waste water treatment device in the process treats acrylic acid wastewater. The concentration of acrylic acid wastewater before treatment is 100mg / L, which has a pungent smell.

[0069] The fixed waste water volume is 2L, which is added to the raw w...

Embodiment 2

[0073] The degradation purification treatment of embodiment 2 phenol waste water

[0074]The ceramic membrane with a honeycomb structure with a pore size of 1-10 μm is used as the catalyst carrier, and the structure is as follows: image 3 As shown, using the impregnation method, the ceramic membrane was immersed in a manganese nitrate solution with a concentration of 1.0mol / L for 24 hours, and then baked at 600°C for 4 hours after precipitation and drying to obtain an ozone-catalyzed oxidation ceramic membrane catalyst.

[0075] The above-mentioned ozone catalytic oxidation ceramic membrane catalyst is sealed with a sealed shell to obtain figure 1 The ceramic membrane catalytic reactor in the figure 2 The wastewater treatment device in the process treats phenol wastewater, and the concentration of phenol wastewater before treatment is 1000mg / L.

[0076] The fixed waste water volume is 2L, which is added to the raw water tank, and the phenol concentration is 1000mg / L. Unde...

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Abstract

The invention provides an ozone catalytic oxidation ceramic membrane catalyst which comprises a plurality of pore channels formed by ceramic membranes, each pore channel comprises a wastewater channeland an ozone channel which are adjacently distributed, each wastewater channel is provided with a wastewater inlet and a wastewater outlet, and each ozone gas channel is provided with an ozone inlet;the pore diameter of the ceramic membrane is 0.01-10 [mu] m; a catalyst is loaded on the ceramic membrane, wherein the catalyst is metal and / or metal oxide. According to the invention, ozone gas enters wastewater through the ceramic membrane wall between gas and liquid, the wall of the ceramic membrane has a developed micropore structure, when ozone gas passes through the wall of the ceramic membrane, the ozone gas is dispersed into tiny bubbles to enter a to-be-treated wastewater system in the adjacent channels, the effect of micropore ozone dispersion is achieved, the solubility of ozone into-be-treated wastewater can be greatly improved, and the utilization rate of ozone is increased. The invention also provides a preparation method of the ozone catalytic oxidation ceramic membrane catalyst, a ceramic membrane catalytic reactor and a wastewater treatment process.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to an ozone catalytic oxidation ceramic membrane catalyst, a preparation method thereof, a ceramic membrane catalytic reactor and a wastewater treatment process. Background technique [0002] The ozone oxidation method has fast treatment speed, strong oxidation ability, no secondary pollution, convenient operation and wide application, especially in sterilization and disinfection. Although the ozone oxidation method has many advantages, under the current conditions, there are still some problems in the treatment of wastewater by using the ozone oxidation technology alone: ​​on the one hand, the reaction selectivity between ozone and organic matter is relatively strong, and it is impossible for ozone to Pollutants are completely mineralized, and the intermediate products generated by decomposition will prevent further oxidation of ozone. In addition, the util...

Claims

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Application Information

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IPC IPC(8): B01J35/04B01J35/10B01J37/02B01J37/08B01J23/745B01J23/34C02F1/78C02F101/34
CPCB01J37/0201B01J37/088B01J23/745B01J23/34B01J23/002C02F1/78C02F1/725C02F2101/34C02F2101/345B01J35/56B01J35/653B01J35/657B01J35/651B01J35/647
Inventor 田振邦段文杰贾俊俊赵亮黄做华黄伟庆陈继红
Owner HENAN ACADEMY OF SCI CHEM RES INST CO LTD
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