Method for treating wastewater through catalytic wet oxidation of ozone

A technology of wet oxidation and ozone catalysis, which is applied in the fields of oxidizing water/sewage treatment, chemical instruments and methods, chemical elements of heterogeneous catalysts, etc. , The effect of the method and process is simple

Pending Publication Date: 2018-05-25
FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But none of them can fundamentally solve the problem of low ozone utilization rate

Method used

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  • Method for treating wastewater through catalytic wet oxidation of ozone
  • Method for treating wastewater through catalytic wet oxidation of ozone
  • Method for treating wastewater through catalytic wet oxidation of ozone

Examples

Experimental program
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Effect test

preparation example Construction

[0020] Preparation of Catalyst A1 (Fe / Al 2 o 3 )

[0021] The macroporous alumina powder and peptizer are kneaded, rolled, and extruded to make a clover-shaped carrier with a diameter of 2.5 mm, and then calcined at 550 ° C in the air to obtain Al 2 o 3 Carrier, specific surface area 220 m 2 / g, pore volume 0.7 cm 3 / g, the average pore diameter is 10.4nm. Weigh 500g of alumina carrier, according to its water absorption with Fe(NO 3 ) 3 9H 2 O by Fe 2 o 3 Accounting for the ratio of 7.5% of the total weight of the catalyst to form a solution. An equal volume of the solution was used to impregnate the alumina carrier for 2 hours, dried at 80° C., and then calcined in a muffle furnace at 550° C. for 4 hours. After the temperature dropped to room temperature, it was taken out to obtain catalyst A1.

[0022] Preparation of Catalyst A2 (Cu-Ce / SiO 2 )

[0023] The diameter is 2.0mm, the specific surface area is 207m 2 / g, pore volume 0.8 cm 3 / g, strip-shaped SiO with...

Embodiment 1

[0033] The catalysts A1 and B1 are loaded into the cylindrical reactor according to the volume percentage of 50% and 50% respectively, and the total volume of the catalyst is 100cm 3 . Acid scarlet simulated dye wastewater (COD: 286.3 mg / L) enters the reactor from the bottom of the reactor at a rate of 200 mL / h, the residence time in the catalyst bed is 30 minutes, and the ozone concentration is 9.5 g / m 3 , at a rate of 400 mL / min, enters the bottom of the reactor together with the waste water. The reaction is carried out at normal temperature and pressure. After the reaction, the COD of the liquid is tested, and the catalyst activity is measured according to the removal rate of COD. The ozone concentration before and after the reactor is detected online with an ozone detector to calculate the effective utilization rate of ozone. The results are listed in Table 1.

Embodiment 2

[0035] Catalysts A2 and B1 were loaded into the reactor according to volume percentages of 40% and 60% respectively, and the reaction conditions were the same as in Example 1. The results are listed in Table 1.

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Abstract

The invention relates to the technical field of wastewater treatment and particularly discloses a method for treating wastewater through catalytic wet oxidation of ozone. The method comprises the steps as follows: organic wastewater and ozone enter a reactor to react, and the reactor is sequentially filled with a catalyst A and a catalyst B in the contact sequence with the organic wastewater. Themethod comprises a simple process and has good stability, the COD removal capacity is high, the effective utilization rate of ozone can be increased, and the dosage of ozone can be reduced.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a method for treating organic wastewater. Background technique [0002] A large amount of organic polluted wastewater caused by industrial production has seriously affected the living conditions of human beings and the ecological environment, and has become an increasingly serious social and economic problem. It is especially difficult to treat organic wastewater that is difficult to biodegrade; Increasingly scarce, the state has become more stringent on the total discharge of pollutants in water, and the formulation of new standards has brought new challenges to the prevention and control of water pollution in my country's refining and chemical enterprises. After the refining and chemical enterprises use the existing secondary biochemical process, the discharge Most of the waste water still cannot meet the discharge requirements of the new standard. Therefore, it is necess...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/78B01J23/46B01J23/745B01J23/83C02F101/30C02F101/32
CPCB01J23/462B01J23/745B01J23/83B01J2523/17B01J2523/3712B01J2523/821B01J2523/842C02F1/725C02F1/78C02F2101/30C02F2101/308C02F2101/32
Inventor 赵越蒋广安李宝忠张晔刘忠生
Owner FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP
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