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A microporous overflow ozone catalytic ceramic membrane for advanced treatment of wastewater and its preparation and application method

An ozone catalysis and advanced treatment technology, applied in water treatment parameter control, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of catalyst mass transfer efficiency or low effective catalytic area, etc. Improve catalytic efficiency and meet environmental protection requirements

Active Publication Date: 2017-12-29
JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the problem of mass transfer efficiency or low effective catalytic area of ​​the catalyst used in the ozone catalytic oxidation method in the existing advanced treatment of industrial wastewater, and to provide a microporous flow-through ozone catalytic ceramic membrane for advanced treatment of wastewater and its preparation and application methods

Method used

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  • A microporous overflow ozone catalytic ceramic membrane for advanced treatment of wastewater and its preparation and application method
  • A microporous overflow ozone catalytic ceramic membrane for advanced treatment of wastewater and its preparation and application method
  • A microporous overflow ozone catalytic ceramic membrane for advanced treatment of wastewater and its preparation and application method

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preparation example Construction

[0039] A kind of preparation method of the microporous overflow ozone catalytic ceramic membrane used for the advanced treatment of waste water of the present invention, by preparing the forming aid containing hydroxypropyl methylcellulose, polyethylene glycol and dysprosium nitrate, molybdenum nitrate, manganese nitrate solution, and with sintered Al 2 o 3 Powder mixing for vacuum sliming, through Al 2 o 3 The adsorption of the powder loads the active ingredients on the carrier to form a flow-through ceramic membrane with well-developed through-holes, so that in practical application, the waste water can be forced to flow through the micropores inside the catalyst to strengthen the mass transfer between the waste water and the surface of the catalyst. At the same time, the effective catalytic area is significantly increased, thereby improving the catalytic efficiency of the catalyst. The concrete steps of the preparation method of the microporous overflow ozone catalytic c...

Embodiment 1

[0051] Will Al 2 o 3 The powder is calcined at 1400°C for 8 hours to convert all of it into α-Al 2 o 3 , so as to control the volume shrinkage and expansion during the sintering process, reduce the cracking during the sintering process, and improve the sintering yield; the pre-fired Al 2 o 3 The powder is ground into a uniform powder of about 400 mesh for later use. Preparation of hydroxypropyl methylcellulose, polyethylene glycol and dysprosium nitrate, molybdenum nitrate, manganese nitrate forming aids and catalytic component loading solution, wherein the concentration of hydroxypropyl methylcellulose is 5%, the concentration of polyethylene glycol is 10 %, the concentrations of dysprosium nitrate, molybdenum nitrate and manganese nitrate are 50% respectively; Al 2 o 3 The powder is mixed with 5% mass ratio of forming aid solution, and enters the vacuum mud refining machine. After 3 hours of mud refining, it is processed into a plate type, tube type or honeycomb cataly...

Embodiment 2

[0054] Will Al 2 o 3 The powder is calcined at 1400°C for 8 hours to convert all of it into α-Al 2 o 3 , so as to control the volume shrinkage and expansion during the sintering process, reduce the cracking during the sintering process, and improve the sintering yield; the pre-fired Al 2 o 3 The powder is ground into a uniform powder of about 600 mesh for later use. Preparation of hydroxypropyl methylcellulose, polyethylene glycol and dysprosium nitrate, molybdenum nitrate, manganese nitrate forming aids and catalytic component loading solution, wherein the concentration of hydroxypropyl methylcellulose is 10%, and the concentration of polyethylene glycol is 15% %, dysprosium nitrate, molybdenum nitrate, and manganese nitrate are respectively 40%; Al 2 o 3 The powder is mixed with a 6% mass ratio of forming aid solution, and enters the vacuum mud refining machine. After 3 hours of mud refining, the vacuum extruder is used to process it into a tubular catalytic filter mem...

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Abstract

The invention discloses a microporous overcurrent ozone catalytic ceramic membrane for waste water deep treatment as well as a preparation method and an application method thereof and belongs to the technical field of catalysts for waste water deep treatment. The catalytic ceramic membrane disclosed by the invention is prepared by the following steps: mixing pre-roasted and ground 400-600-mesh Al2O3 power with a catalytic component solution of dysprosium nitrate, molybdenum nitrate and manganous nitrate; and by taking hydroxypropyl methyl cellulose, polyethylene glycol and an aqueous solution of dysprosium nitrate, molybdenum nitrate and manganous nitrate as a forming assistant, pasting, mixing, extruding and forming, drying and vacuum-sintering the mixture to obtain the microporous overcurrent ozone catalytic ceramic membrane. The microporous overcurrent ozone catalytic ceramic membrane prepared by the invention creatively couples a microporous overcurrent with a catalytic ozonation technology, so that waste water passes through micron order ducts of the ceramic membrane at a relatively high flow rate by means of an external pressure different action, and therefore, the mass transfer efficiency of ozone and organic matter pollutants and the surface of the catalyst is effectively accelerated and meanwhile, the micron order ducts developing in the catalyst hugely increase the effective catalytic area of a catalytic module in a unit volume.

Description

technical field [0001] The invention belongs to the technical field of catalysts for advanced wastewater treatment, and more specifically relates to a microporous overflow ozone catalytic ceramic membrane for advanced wastewater treatment and a preparation and application method thereof. Background technique [0002] Advanced wastewater treatment refers to the need to further degrade the refractory pollutants in the wastewater after biochemical treatment to achieve a more stable treatment effect and meet higher discharge standards. Wastewater, especially industrial wastewater, often contains more nitrogen heterocycles, phosphorus heterocycles, chlorinated benzenes, nitrobenzenes, phenols, polycyclic aromatic hydrocarbons, saturated alkanes, and these substances have a stable structure , Most of them are hydrophobic and biologically toxic, relying solely on biochemical treatment, it is difficult to meet the standards, and it is necessary to carry out advanced treatment on the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/78C02F1/72B01J23/34B01J35/04C02F101/30
CPCB01J23/002B01J23/34B01J35/04B01J2523/00C02F1/725C02F1/78C02F2101/30C02F2209/08C02F2301/02B01J2523/31B01J2523/3762B01J2523/68B01J2523/72
Inventor 徐军武倩涂勇张耀辉唐敏李军
Owner JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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