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Method for treating organic wastewater by catalytic wet oxidation method

A technology for catalyzing wet oxidation and organic wastewater, which is applied in the fields of oxidized water/sewage treatment, chemical instruments and methods, catalyst activation/preparation, etc., and can solve the problems of high energy consumption, increased industrial wastewater treatment cost, and low organic wastewater treatment efficiency. , to achieve high economic and environmental benefits

Pending Publication Date: 2022-07-29
河南天辰新垣环保科技研究院股份有限公司
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Problems solved by technology

However, the current wet oxidation treatment equipment has low treatment efficiency for organic wastewater and high energy consumption, which increases the cost of industrial wastewater treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Treatment of pharmaceutical wastewater:

[0020] The COD of organic wastewater in a chemical synthesis pharmaceutical factory is 20000-30000 mg / L. The straw is crushed into particles with a diameter of less than 5mm and added to the organic wastewater. The mass ratio of the addition amount to the organic wastewater is 10%. The mixed solution is added to the hydrothermal reaction In the kettle, the reaction temperature of the in-situ reaction under anoxic conditions is 160-180 °C, and the reaction time is 5-6 h, one or both of straw carbide or straw carbon are generated, and the reaction temperature is continued to increase to 200 °C. ~220℃, the reaction pressure is 2~2.5MPa, the reaction time is 1~2h, a certain amount of oxygen (the amount of oxygen is calculated according to the COD of the organic wastewater), preferably 180% of the oxygen demand, the COD of the organic wastewater is removed The rate can reach more than 80%. In this process, the catalyst is used to ca...

Embodiment 2

[0022] Treatment of chemical wastewater:

[0023] The COD of organic wastewater from a chemical plant is 40000-50000mg / L. The straw is crushed into particles with a diameter of less than 5mm and added to the organic wastewater. The mass ratio of the addition amount to the organic wastewater is 8%. The mixed solution is added to the hydrothermal reactor , the reaction temperature of the in-situ reaction under anoxic conditions is 180-190 °C, and the reaction time is 5-6 h, one or both of straw carbide or straw carbon are generated, and the reaction temperature is continued to increase to 200-220 °C. ℃, the reaction pressure is 2~2.5MPa, the reaction time is 2.0h, feed a certain amount of oxygen (the amount of oxygen is calculated according to the COD of the organic waste water, preferably 200% of the oxygen demand. The COD removal rate of the organic waste water can reach 80% This process utilizes the catalyst produced in situ to catalyze the wet oxidation reaction of organic m...

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Abstract

The invention discloses a method for treating organic wastewater by a catalytic wet oxidation method, which comprises the following steps: 1) crushing straws into particles, adding the crushed straws into the organic wastewater to form a mixture, heating the mixture to 160-190 DEG C, and fully carbonizing the straws to form a catalyst in situ; 2) introducing oxygen into the catalyst solution, raising the reaction temperature to 220-220 DEG C and the reaction pressure to 2-2.5 MPa, and carrying out catalytic oxidation reaction on the organic wastewater under the action of a catalyst formed by carbonizing the straws, so that the organic wastewater is oxidized and degraded; according to the method, the high-temperature condition needed for catalyzing the wet oxidation reaction is fully utilized, the efficient hydrothermal carbon or hydrothermal carbide catalyst is generated in situ through the straw, the catalyst is used for catalyzing the wet oxidation reaction of the organic matter, and the problem of high cost of purchasing activated carbon or other catalysts is solved; the resource utilization of the organic waste straw is realized, and relatively high economic benefits and environmental benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of organic wastewater treatment, in particular to a method for treating organic wastewater by a catalytic wet oxidation method. Background technique [0002] In recent years, with the rapid development of chemical, pharmaceutical, coking, printing and dyeing industries, the discharge of organic wastewater has been increasing, and these organic wastewaters contain a large number of toxic and harmful organic pollutants that are difficult to biodegrade. Such organic pollutants mainly include polycyclic aromatic hydrocarbons, halogenated hydrocarbons, heterocyclic compounds, organic phenolic compounds, organic phosphorus pesticides, surfactants, organic dyes, etc. If these substances are discharged into the environment without treatment, they will inevitably pollute the environment seriously and threaten human health. Therefore, the treatment of refractory toxic and harmful organic wastewater is the current res...

Claims

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Application Information

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IPC IPC(8): C02F1/72B01J21/18B01J37/10C09K17/02C02F101/30
CPCC02F1/725C09K17/02B01J21/18B01J37/10C02F2101/30
Inventor 曾旭卢晓涛王开孔林李强
Owner 河南天辰新垣环保科技研究院股份有限公司
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