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Regeneration method and device used for deactivation catalyst layer of membrane ozone catalytic reactor

A technology of ozone catalysis and reactor, applied in chemical instruments and methods, catalyst regeneration/reactivation, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem that there are no relevant research reports on catalyst regeneration methods

Inactive Publication Date: 2014-04-30
TIANJIN ACADEMY OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no relevant research report on the regeneration method of the catalyst in the membrane ozone catalytic deactivation module

Method used

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  • Regeneration method and device used for deactivation catalyst layer of membrane ozone catalytic reactor
  • Regeneration method and device used for deactivation catalyst layer of membrane ozone catalytic reactor
  • Regeneration method and device used for deactivation catalyst layer of membrane ozone catalytic reactor

Examples

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Effect test

Embodiment 1

[0083] A method for regenerating deactivated catalytic membrane components of a membrane ozone catalytic reactor, comprising:

[0084] (1) Firstly, air is introduced and baked at 600°C to remove organic pollutants remaining in the membrane module;

[0085] (2) Then use a mixture of 66% nitric acid and 37% hydrochloric acid to heat dissolve at 100°C for 5 minutes to remove the metal oxide attached to the catalytic layer of the membrane; the molar ratio of nitric acid to hydrochloric acid is 1:3;

[0086] (3) After the modified Mn-Si-Ti catalyst suspension with a mass concentration of 10% (w / w) is atomized, it is sucked under negative pressure to make it enter the membrane support and load the inner surface of its pores;

[0087] (4) Finally, remove the modified Mn-Si-Ti catalyst adsorbed on the surface of the membrane separation layer by spraying and rinsing, and immerse the outer surface of the membrane module in the modified Ni-Co catalyst suspension with a mass concentration...

Embodiment 2

[0099] A method for regenerating deactivated catalytic membrane components of a membrane ozone catalytic reactor, comprising:

[0100] (1) First, air is introduced and baked at 850°C to remove organic pollutants remaining in the membrane module;

[0101] (2) Then use a mixture of 66% nitric acid and 37% hydrochloric acid to heat dissolve at 160°C for 5-20 minutes to remove the metal oxides attached to the catalytic layer of the membrane; the molar ratio of nitric acid to hydrochloric acid is 3:1

[0102] (3) After the modified Mn-Si-Ti catalyst suspension with a mass concentration of 30% (w / w) is atomized, it is sucked under negative pressure to make it enter the membrane support and load the inner surface of its pores;

[0103] (4) Finally, remove the modified Mn-Si-Ti catalyst adsorbed on the surface of the membrane separation layer by spraying and rinsing, and immerse the outer surface of the membrane module in the modified Ni-Co catalyst suspension with a mass concentratio...

Embodiment 3

[0115] Apparatus for deactivating catalytic membrane modules in membrane ozone catalytic reactors (see figure 1 ), including the organic residue removal device of the deactivated membrane module and the regeneration recovery device of the deactivated membrane module; among them

[0116] Inactivated membrane module organic residue removal device: mainly composed of air compressor, temperature control heater and roasting box, the connection between temperature control heater and roasting box is: The heating electrode is regulated so that the temperature in it reaches the set value; the air compressor is connected to the air inlet in the roasting box through the air guide tube, so that the air enters the roasting box to provide an oxygen source for the oxidation, and through the deactivation The membrane module is placed in a closed device, and the temperature and time are controlled to bake in the baking box, so that the organic pollutants remaining in the membrane module are o...

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Abstract

The invention relates to a regeneration method and a device used for a membrane module deactivation catalyst layer in a membrane ozone catalytic reactor. The regeneration method comprises the steps of firstly, introducing air, heating and roasting to remove residual organic pollutants in a membrane module; then carrying out hot dissolution for 5-20 minutes by adopting mixed liquor of nitric acid and hydrochloric acid, and removing metal oxide attached to a membrane catalytic layer; after atomizing 5%-30% modified Mn-Si-Ti catalyst suspension, sucking under negative pressure to enable the modified Mn-Si-Ti catalyst suspension to enter a membrane supporting body, and loading the inner surfaces of holes of the suspension; and finally removing a modified Mn-Si-Ti catalyst adsorbed on the surface of a membrane separation layer by spraying and washing, and after immersing the outer surface of the membrane module into 15%-25% modified Ni-Co catalyst suspension for 5-10 minutes, drying the obtained sample at 80-150 DEG C to obtain the regenerative catalytic membrane module. By utilizing the regeneration method and the device for the deactivation catalyst provided by the invention, the deactivation catalyst can be effectively regenerated, the service life is prolonged, and the operating cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a method and a device for regenerating an inactivated catalytic layer of a membrane module in a membrane ozone catalytic reactor, and the reactor mainly treats refractory organic wastewater. Background technique [0002] High-concentration refractory organic wastewater is mainly wastewater produced in the production process of dyes, pesticides, medicines, chemicals, coking, etc. Wastewater pollutants have high concentrations, high toxicity, and high salt content are difficult to biodegrade, so pretreatment technologies and methods must be used , can be dealt with effectively. Several typical high-concentration organic wastewater, such as coking wastewater, pharmaceutical wastewater, textile / , printing and dyeing wastewater, petroleum / chemical wastewater, etc., the COD concentration of the effluent of the main production sections is generally above 3000-5000mg / L, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J38/68B01J23/889B01J23/94B01D65/06C02F1/78C02F1/44
Inventor 许丹宇张洪雷段云霞郑先强石岩卢学强邓小文马超华檀翠玲
Owner TIANJIN ACADEMY OF ENVIRONMENTAL SCI
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