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Method and device for degrading phenol wastewater by heterogeneous catalysis of ozone in high gravity field

A heterogeneous catalysis, heterogeneous catalyst technology, applied in the direction of chemical instruments and methods, oxidized water/sewage treatment, water pollutants, etc., can solve the loss of metal ions, difficulty in separation, secondary pollution of the environment, ozone mass transfer efficiency And other problems, to achieve the effect of reducing processing costs, improving ozone utilization rate, and broad application prospects

Inactive Publication Date: 2019-11-12
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the problems of metal ion loss, difficulty in separation, secondary pollution to the environment and low ozone mass transfer efficiency in the existing homogeneous catalytic ozone degradation method for phenol wastewater, the present invention provides a heterogeneous catalytic ozone in a supergravity field Method and device for degrading phenol wastewater

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  • Method and device for degrading phenol wastewater by heterogeneous catalysis of ozone in high gravity field
  • Method and device for degrading phenol wastewater by heterogeneous catalysis of ozone in high gravity field

Examples

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Embodiment 1

[0033] Example 1: Using figure 1 In the process shown, Fe-Mn-Cu / γ-Al2O3 catalyst is used as filler to degrade phenol wastewater in a high gravity field. The active components Fe: Mn: Cu are 0.2%, 0.2% and 0.8% respectively, the specific surface area is 212.12m2 / g, the pore volume is 0.7 cm3 / g, the pore diameter is 5.013 nm, and the pHpzc is 6. The initial concentration of phenol was 100 mg / L, 2 L of water samples were taken, the hypergravity factor β was 40, the liquid flow rate was 85 L / h, the gas flow rate was 60 L / h, the gas phase ozone concentration was 60 mg / L, and the catalyst dosage The pH value is 110 g / L, the pH value is 6, the wastewater circulation reaction is 30 min, and the TOC removal rate reaches 96.42%. When the pH is 2, the TOC removal rate reaches 79.73%, and when the pH is 12, the TOC removal rate reaches 60.74%. , Compared with traditional equipment, it is increased by 21%, and the utilization rate of ozone is increased by 30%.

Embodiment 2

[0034] Example 2: Using figure 1 In the process shown, CuO-Fe2O3 / γ-Al2O3 catalyst is used as filler to degrade phenol wastewater in a supergravity field. The active components Cu: Fe are 2% and 2% respectively, and the specific surface area is 172.32 m2 / g, the pore volume is 0.35 cm3 / g, the pore diameter is 10 nm, and the pHpzc is 8.5. The initial concentration of phenol is 200 mg / L, 2 L of water sample is taken, the hypergravity factor β is 30, the liquid flow rate is 65 L / h, the gas flow rate is 40 L / h, the pH value is adjusted to 8, and the catalyst dosage is 60 g / L, the gas phase ozone concentration was adjusted to 60 mg / L, and the wastewater was circulated for 30 minutes, and the TOC removal rate reached 84.21%. When the ozone concentration was 80 mg / L, the TOC removal rate was 91.42%. Compared with traditional equipment, the TOC removal rate is increased by 18%, and the ozone utilization rate is increased by 30%.

Embodiment 3

[0035] Example 3: Using figure 1 The process shown uses MnOx / SAC catalyst as filler to degrade phenol wastewater in a high-gravity field. Contains active component Mn (1%), and its specific surface area is 100.24 m2 / g, pore volume is 0.164 cm3 / g, pore diameter is 3.633nm, pHpzc is 3. The initial concentration of phenol was 300 mg / L, 2 L of water samples were taken, the gas phase ozone concentration was 80 mg / L, the liquid flow rate was 65 L / h, the gas flow rate was 60 L / h, the pH value was adjusted to 4, and the catalyst dosage was was 90 g / L, adjusted the hypergravity factor β to 60, and the wastewater was circulated for 30 minutes, the TOC removal rate reached 90.51%. When β was 0, the TOC removal rate reached 36.99%. Compared with traditional equipment, the TOC removal rate is increased by 20%, and the ozone utilization rate is increased by 30%.

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Abstract

The invention belongs to the technical field of phenol wastewater treatment, and provides a method and a device for degrading phenol wastewater by heterogeneous catalysis of ozone in a high gravity field in order to solve the problems of loss of metal ions, difficulty in separation, easiness in causing secondary pollution to the environment and low ozone mass transfer efficiency in a method for degrading phenol wastewater by homogeneous catalysis of ozone. The method comprises the following steps: with a supergravity rotating packed bed as a reactor and a heterogeneous solid catalyst as a filler, adding phenol wastewater into a liquid storage tank in a semi-intermittent feeding manner; under the action of a peristaltic pump, uniformly spraying the phenol wastewater on the inner side of theheterogeneous catalyst filler, and enabling the phenol wastewater to move outwards along the radial direction of the filler layer under the action of supergravity, at this time, the phenol wastewateris in cross-flow contact with ozone gas entering in the axial direction, and the heterogeneous catalyst catalyzes ozone and decomposes the ozone to generate hydroxyl radicals, so that the phenol wastewater is degraded. The process realizes repeated utilization of the catalyst, improves the degradation capability of organic matters, reduces post-treatment procedures, reduces the industrial cost, and has a wide application prospect in the field of treatment of degradation-resistant organic wastewater.

Description

technical field [0001] The invention belongs to the technical field of phenol wastewater treatment, and specifically relates to a method and device for heterogeneously catalyzing ozone to degrade phenol wastewater in a supergravity field, and adopts the coupling of supergravity technology and heterogeneously catalyzed ozone oxidation technology to jointly realize the treatment of phenol wastewater deal with. Background technique [0002] Phenol is a representative of phenolic compounds and is an important chemical raw material widely used in coking coal, petrochemical, oil refining and other industrial fields, and this kind of wastewater has a wide range of sources, high toxicity, and is difficult to biodegrade. If it is not treated in time and directly discharged into the environment, it will cause serious pollution, so it is imperative to adopt economical and effective treatment methods. [0003] Among many methods, ozone oxidation technology has good treatment effect and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/78C02F101/34
CPCC02F1/725C02F1/78C02F2101/345
Inventor 焦纬洲刘有智魏兴跃
Owner ZHONGBEI UNIV
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