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Catalytic wet oxidation treatment method for wastewater

A technology that catalyzes wet oxidation and treatment methods. It is applied in the direction of oxidized water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc. It can solve the problems of slow diffusion, large molecular weight, and affecting the effect of wastewater treatment, so as to improve the degradation rate. , to promote the effect of diffusion

Active Publication Date: 2015-05-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the actual industrial wastewater often contains a large amount of high molecular weight polymer, which has a large molecular weight and slow diffusion in the catalyst, which affects the wastewater treatment effect.

Method used

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  • Catalytic wet oxidation treatment method for wastewater
  • Catalytic wet oxidation treatment method for wastewater
  • Catalytic wet oxidation treatment method for wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1.5 g of anhydrous RuCl 3 Dissolve in 30ml water to make a solution , with 98 grams of 20-80 mesh TiO 2 Carrier impregnation solution , dried at 80°C for 24 hours, and calcined at 700°C for 4 hours to prepare the catalyst, using N 2 The pore volume of the catalyst is determined by the adsorption method to be 0.2ml / g, in which the pores larger than 3nm account for 50% of the pore volume, and the pores smaller than 1nm account for 20% of the pore volume.

[0016] Use the catalyst prepared above to treat wastewater with a COD of 100,000mg / l and a polymer weight content of 5%. In a fixed bed reactor, at a reaction temperature of 260°C, a reaction pressure of 7.0Mpa, and a liquid space velocity of 2.0 hours -1 , The COD removal rate is 97.5%, and the polymer degradation rate is 100%.

[0017]

Embodiment 2～17

[0019] The catalyst preparation method is the same as [Example 1], only the components, component ratios and preparation conditions are changed, the specific preparation conditions are shown in Table 1, the pore size and pore volume test results are shown in Table 1, and the reaction results for treating organic wastewater are shown in Table 2 .

[0020]

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Abstract

The invention relates to a wet oxidation treatment method for wastewater catalysis, and mainly solves the problem that high molecular polymer in wastewater influence the effect of catalytic wet oxidation treatment for wastewater. According to the invention, the high concentration organic wastewater and gas containing elemental oxygen contact with a catalyst under the conditions of reaction temperature of 230-290 DEG C, reaction pressure of 4-10 MPa and liquid space velocity of 0.5-2.5 / h; the removal rate of COD is higher than 95%, the degradation rate of the polymer is higher than 99%; in the catalyst, pore volume larger than 3 nm accounts for 30-80% of the pore volume, micropore volume less than 1 nm accounts for 10-40% of the pore volume, and the pore volume is 0.05-0.3 ml / g. The technical scheme solves the problem, and can be used for treatment of industrial organic wastewater.

Description

technical field [0001] The invention relates to a wastewater catalytic wet oxidation treatment method. Background technique [0002] Wet oxidation is a high-concentration organic sewage treatment technology developed in the 1980s abroad, that is, under a certain temperature and pressure, the organic matter in the sewage and the harmful substances containing N and S are oxidized and decomposed into CO 2 , N 2 , SO 4 2- and water and other harmless substances. CN1095447C provides a wet oxidation catalyst, which can well oxidize refractory small molecular acid acetic acid through wet oxidation method; CN1935687A provides a catalytic wet oxidation treatment method for chlorophenol pollutants and a corresponding catalyst. However, the actual industrial wastewater often contains a large amount of high molecular weight polymer, which has a large molecular weight and slow diffusion in the catalyst, which affects the wastewater treatment effect. Contents of the invention [0...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/74B01J23/46B01J23/42B01J23/44
CPCB01J23/002B01J23/42B01J23/44B01J23/462B01J2523/00C02F1/727C02F1/74B01J2523/824B01J2523/821B01J2523/47B01J2523/41B01J2523/828B01J2523/31B01J2523/48B01J2523/827
Inventor 宋卫林吴粮华汪国军姚全明
Owner CHINA PETROLEUM & CHEM CORP
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