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Wastewater treatment method

A treatment method and wastewater technology, which is applied in the direction of oxidized water/sewage treatment, magnetic field/electric field water/sewage treatment, etc., can solve problems such as uneven mass transfer, affecting wastewater treatment effect and treatment stability, and easy hardening of catalysts, etc., to achieve Good treatment effect, avoid compaction problem, improve solid-liquid mass transfer and heat transfer effect

Inactive Publication Date: 2013-10-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of the prior art in the reaction process of using wet oxidation technology to treat wastewater, such as uneven heat transfer and mass transfer, and the catalyst is easy to harden, which affects the treatment effect and stability of wastewater, and provides a wet oxidation technology. In the reaction process of oxidation technology to treat wastewater, heat transfer and mass transfer are uniform, and can prevent the compaction of wet oxidation catalysts, so that wastewater can be treated effectively and stably

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment is used to illustrate the wastewater treatment method provided by the present invention.

[0034] The waste water treated in this example is high concentration organic waste water from a refinery.

[0035] Described waste water is introduced continuously from the bottom of the magnetically stable reactor that ferric oxide particles (particle diameter is 150 microns) are housed (the filling capacity of ferric oxide particles in the reactor is 65% of reactor volume, the waste water The liquid hourly space velocity is 1.5h -1 ), feed current into the coil wound on the periphery of the reactor, so that the magnetic field strength of the applied electromagnetic field is 300 Oersted, so that the ferric oxide particles are suspended in the waste water, and at a temperature of 260 ° C, a pressure of Under the condition of 4.2MPa, air is introduced into the reactor. In terms of the mass of oxygen, the amount of air introduced is 1.2 times the theoretical value o...

Embodiment 2

[0043] This embodiment is used to illustrate the wastewater treatment method provided by the present invention.

[0044] The wastewater treated in this embodiment is wastewater from a chemical plant.

[0045] The method for preparing the magnetic catalyst particles used in this embodiment is as follows: 65% by weight of ferrous oxide (ferrous oxide particle diameter is 2-10 microns), 22% by weight of copper oxide (powder diameter is 2-10 microns) ), 8% by weight of zinc oxide (the diameter of the powder is 2-10 microns), 3% by weight of magnesium oxide (the diameter of the powder is 2-10 microns) and 2% by weight of cerium oxide (the diameter of the powder is 2-10 microns). Sintering at 500° C. for 2 hours to obtain catalyst particles with a particle diameter of 120 μm.

[0046] The waste water is continuously introduced from the bottom of the magnetically stable bed reactor with the above-mentioned catalyst particles (the catalyst particle loading is 70% of the reactor volum...

Embodiment 3

[0054] This embodiment is used to illustrate the wastewater treatment method provided by the present invention.

[0055] Waste water was treated according to the method of Example 1, the difference was that the magnetic field strength of the applied electromagnetic field was 800 Oersted; the COD value of the waste water after treatment was 312 mg / L, the BOD value was 132 mg / L, and the B / C was 0.42.

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Abstract

The invention discloses a wastewater treatment method which comprises the following step: under the action of a magnetic field, suspending magnetic catalyst granules capable of catalyzing organic matters in wet oxidation wastewater in wastewater, thus performing catalytic wet oxidation treatment on the wastewater. The method provided by the invention can improve the solid-liquid mass transfer and heat transfer in a reactor, enhance the reaction effect, reduce the reaction temperature and pressure and well avoid the hardening problem of the catalyst in the wastewater treatment process, and has better and more stable wastewater treatment effect, thereby effectively reducing the COD (chemical oxygen demand) value of the wastewater and improving the biodegradability of the wastewater.

Description

technical field [0001] The invention relates to a method for treating waste water. Background technique [0002] In the process of industrial production, a type of organic high-concentration wastewater is often produced. Because the content of organic components in this type of wastewater is relatively high, sometimes the wastewater also contains toxic and harmful substances. It is difficult to achieve discharge with simple biochemical treatment methods. Require. The use of combustion and other methods to treat organic high-concentration wastewater not only consumes a lot of energy, but also has high operating costs and is likely to cause secondary pollution. The use of wet oxidation to treat organic high-concentration wastewater has the advantages of high efficiency, energy saving and stable operation, so it has been widely concerned and welcomed by people. The wet oxidation method refers to a process in which organic waste water is oxidized together with air (or oxygen) ...

Claims

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Application Information

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IPC IPC(8): C02F1/48C02F1/72C02F1/74
Inventor 高峰
Owner CHINA PETROLEUM & CHEM CORP