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Method for catalytic wet oxidation of industrial sludge

A technology for catalyzing wet oxidation and industrial sludge, applied in the field of resources and environment, can solve the problems of complex composition of industrial sludge, and achieve the effects of reducing technical difficulty and environmental risks, reducing the solid content and volume of sludge

Inactive Publication Date: 2016-07-20
SHANGHAI HUANGU INVESTMENT MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composition of industrial sludge is complex, and it often needs to be processed under high reaction temperature and pressure.

Method used

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  • Method for catalytic wet oxidation of industrial sludge

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Experimental program
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Effect test

Embodiment 1

[0031] A method for catalytic wet oxidation treatment of pharmaceutical sludge produced by a pharmaceutical factory, combined with such figure 1 The shown processing device comprises the following steps:

[0032] (1) Pharmaceutical sludge and powdery activated carbon are mixed evenly, and are added in the reactor 1 from reactor mud inlet 11, wherein the moisture content of pharmaceutical sludge is 97%, VSS: SS is 81%, the powdery activated carbon Add-on amount is 5g / L; Pass into oxygen then from reactor oxygen inlet 12, make the oxygen pressure in reactor 1 be 0.6MPa, start reactor 1, make the temperature in the kettle be 220 ℃, pressure be 4.2MPa, make pharmaceutical Sludge was subjected to wet oxidation treatment, and the treatment was stopped after 30 minutes. After wet oxidation, the sludge SS removal rate reached 67%, and the VSS removal rate reached 84%.

[0033] (2) Discharge the treated pharmaceutical sludge from the reactor mud outlet 13 at the bottom of the reactor ...

Embodiment 2

[0037] Using the same device, pharmaceutical sludge raw material and treatment process as in Example 1, only the catalyst selection and treatment conditions have been changed, and the changes are as follows:

[0038] (1) Using Fe 3+ Ions are used as catalysts, and the dosage is 0.05mol / L;

[0039] (2) The conditions of the wet oxidation treatment adopted are as follows: the temperature is 200° C., the pressure is 4.0 MPa, the reaction time is 30 min, and the initial pressure of aeration of oxygen is 0.8 MPa.

[0040]Finally, after wet oxidation, the sludge SS removal rate reached 70%, and the VSS removal rate reached 88%. After plate and frame filtration, the moisture content of the sludge is 58%, and the sludge volume is less than 85%.

Embodiment 3

[0042] Using the same device, pharmaceutical sludge raw material and treatment process as in Example 1, only the catalyst selection and treatment conditions have been changed, and the changes are as follows:

[0043] (1) Using Zn 2+ Ions are used as catalysts, and the dosage is 0.05mol / L;

[0044] (2) The conditions of the wet oxidation treatment adopted are: the temperature is 200° C., the pressure is 4.5 MPa, the reaction time is 60 min, and the initial pressure of oxygen filling is 1.0 MPa.

[0045] Finally, after wet oxidation, the sludge SS removal rate reached 66%, and the VSS removal rate reached 82%. After plate and frame filtration, the moisture content of the sludge is 60%, and the sludge volume is less than 80%.

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Abstract

The invention relates to a method for catalytic wet oxidation of industrial sludge. The method includes the steps of (1), uniformly mixing industrial sludge raw materials with a catalyst, delivering the mixture into a reaction kettle, and feeding oxygen into the reaction kettle so as to subject the industrial sludge to wet oxidation; (2), delivering the industrial sludge subjected to wet oxidation into a cooler to cool, and delivering the cooled industrial sludge into a three-phase separator so as to obtain solid sludge at the bottom of the three-phase separator; (3), subjecting the solid sludge to dehydration treatment. Compared with the prior art, the method for catalytic wet oxidation of the industrial sludge has the advantages that the industrial sludge is reduced remarkably, refractory organics are removed to kill harmful pathogenic bacteria, treated sludge organic content is low to facilitate subsequent treatment, a liquid phase obtained after solid waste separation returns to an industrial wastewater treatment system to supplement a carbon source, and wet oxidation conditions can be lowered remarkably by the catalyst, so that energy consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of resources and environment, in particular to a method for catalytic wet oxidation treatment of industrial sludge. Background technique [0002] In recent years, my country's medicine, papermaking, printing and dyeing, petrochemical and other industries have developed rapidly. While providing protection for people's normal life, it also brings environmental problems such as industrial wastewater. At present, industrial wastewater is mostly treated by various biological methods based on activated sludge method, and a large amount of residual sludge will be generated during the treatment process. The composition of industrial sludge is extremely complex, containing a large amount of refractory organic matter, heavy metals, salts and other substances. In addition, the sludge of some specific industries (such as the pharmaceutical industry) contains a large number of drug-resistant microorganisms, which will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/08C02F11/06C02F11/12
CPCC02F11/06C02F11/08C02F11/12C02F11/121C02F11/127C02F2303/06
Inventor 赵建夫王昌达叶凡林宇澄张华曾旭范中彦刘俊
Owner SHANGHAI HUANGU INVESTMENT MANAGEMENT CO LTD
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