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Method for treating organic wastewater through catalytic wet oxidation

A technology for catalyzing wet oxidation and organic wastewater. It is applied in the fields of oxidized water/sewage treatment, chemical instruments and methods, molecular sieve catalysts, etc. It can solve the problems of high COD removal capacity and metal loss, achieve high COD removal effect and reduce metal Emission of ions, effect of simple process

Active 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

[0005] Aiming at the deficiencies of the prior art, the present invention provides a method for treating organic wastewater by catalytic wet oxidation, which has simple process and good stability, and not only has high COD removal capacity, but also can solve the problem of metal loss

Method used

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  • Method for treating organic wastewater through catalytic wet oxidation
  • Method for treating organic wastewater through catalytic wet oxidation
  • Method for treating organic wastewater through catalytic wet oxidation

Examples

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preparation example Construction

[0020] Preparation of Catalyst A1 (Ru / AC)

[0021] The diameter is 2.0mm, the specific surface area is 704m 2 / g, pore volume 0.7cm 3 / g, commercial columnar activated carbon strips with an average pore size of 2.0 nm were dried at 120 °C for later use. Weigh 500g of dried activated carbon strips, and use RuCl according to its water absorption 3 A solution was prepared at a ratio of Ru accounting for 2% of the total weight of the catalyst. Activated carbon strips were impregnated with equal volumes of Ru solution for 24 hours, dried at 100°C and placed in a tube furnace. 2 N 2 Reduction for 4 hours, and then with 1% O 2 N 2 After passivation for 4 hours, the temperature was lowered to room temperature and then taken out to obtain catalyst A1.

[0022] Preparation of Catalyst A2 (Ru-Ce / Al 2 o 3 )

[0023] 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...

Embodiment 1

[0030] The catalysts A1 and B1 are loaded into the cylindrical reactor according to the volume percentage of 60% and 40% respectively, and the total volume of the catalyst is 100cm 3 . The wastewater used is refinery wastewater, the initial value of COD is 4620.7 mg / L, and oxygen is used as oxidant, and the dosage is 1.6 times of the required theoretical value. The temperature of the reactor is 260°C, the pressure is 3.5 MPa, and the residence time is 60 minutes. After the reaction, the COD of the liquid is tested, and the catalyst activity is measured according to the removal rate of COD. After the reaction, the content of copper ions in the liquid was tested by inductively coupled plasma mass spectrometry (ICP-MS) to investigate the loss of metals. The results are listed in Table 1.

Embodiment 2

[0032] Catalysts A2 and B1 are loaded into the reactor according to volume percentages of 20% and 80% respectively, the waste water flow rate is adjusted so that the residence time in the catalyst bed is 12 minutes, and the oxygen consumption is 2.0 times of the required theoretical value, Other reaction conditions are identical with embodiment 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 organic wastewater through catalytic wet oxidation. The method comprises steps asfollows: the organic wastewater and an oxidizing agent enter a reactor for a reaction, and the reactor is sequentially filled with a catalyst A and a catalyst B according to the contacted sequence with the organic wastewater. The method adopts a simple technology and is good in stability, not only is COD removing capacity high, but also the problem of metal loss can be solved.

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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IPC IPC(8): C02F1/72C02F1/28B01J23/46B01J23/63B01J23/83B01J29/46C02F101/20C02F101/30
CPCB01J23/462B01J23/63B01J23/83B01J29/46C02F1/281C02F1/725C02F1/727C02F2101/20C02F2101/30
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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