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Microwave catalytic oxidation process and apparatus for treating waste water containing hard-to-degrade organic matters

A microwave catalytic oxidation and organic wastewater technology, applied in the field of water treatment, can solve the problems of expensive self-made catalysts, difficulty in technology promotion, high treatment costs, etc., and achieve the effects of easy automatic production, simple process, and high organic degradation efficiency

Inactive Publication Date: 2005-05-04
DALIAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem with this method is that CO 2 , NO x , SO x , HCl, and even more toxic dioxins are released to cause air pollution; at the same time, a large amount of fuel oil is required for incineration. Generally, one ton of waste water needs equivalent fuel oil, and the treatment cost is expensive.
The disadvantages of this process technology: (1) the reaction must be carried out at 270 ° C and 9.0 MPa to obtain satisfactory results; (2) the self-made catalyst is expensive; (3) there is a certain difficulty in the promotion of this technology

Method used

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  • Microwave catalytic oxidation process and apparatus for treating waste water containing hard-to-degrade organic matters
  • Microwave catalytic oxidation process and apparatus for treating waste water containing hard-to-degrade organic matters
  • Microwave catalytic oxidation process and apparatus for treating waste water containing hard-to-degrade organic matters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Dalian ×× Pesticide Factory Production Wastewater Treatment

[0052] This is a ××× pesticide factory with an annual output of ×× 10,000 tons. The amount of pesticide synthesis wastewater is 10 tons / day, and the COD of wastewater is 4000-10000 mg / L. The process and device of the present invention are used to investigate the removal rate of COD in wastewater.

[0053] The wastewater retrieved from Dalian ××× Pesticide Factory has no impurities in the water and is relatively transparent. Therefore, the wastewater [1] is collected in the original water tank [14] and does not need to be treated with grids to remove impurities [2] and flocculation and sedimentation [3]. , directly measured by the pump [16] through the flow meter [5], pumped into the microwave reactor [17] for catalytic oxidation reaction, and the treated water is discharged through the treated water outlet [34] at the lower end of the microwave reactor. The steam [9] generated during the reaction enters the h...

Embodiment 2

[0062] Simulated Dye Wastewater Treatment

[0063] Commercially available acid green dyes are used to prepare simulated dye wastewater with a chromaticity of 6000-7000 times, and the decolorization rate is investigated by using the device of the present invention. The acid green simulated dye wastewater prepared by the experiment is free of impurities and transparent. After passing directly through the flowmeter [5], it is pumped into the microwave reactor [17] for oxidative decomposition reaction. The treated water passes through the treated water outlet at the lower end of the microwave reactor [34] ]Reuse. The steam [9] generated during the reaction enters the heat exchanger [10] through the steam outlet [23] at the upper end of the microwave reactor, and is reused after cooling. Concrete steps are the same as Example 1 (omitted), and its optimum process parameter is as follows: flow rate 100L / h, residence time 12min, temperature 85 ℃, catalyzer Ni-C, oxygenant adopt air, ...

Embodiment 3

[0066] Laboratory organic wastewater treatment

[0067] The laboratory organic wastewater is collected in the original water tank after removing impurities, and water, phenol, acetic acid and other waste organic reagents are added to prepare simulated wastewater with a COD ~ 9000mg / L. The COD removal rate of the wastewater is investigated by using the process and device of the present invention. The simulated organic wastewater prepared by the experiment is translucent and free of impurities. After passing directly through the flowmeter [5], it is pumped into the microwave reactor [17] for oxidation and decomposition reactions. The treated water passes through the treated water outlet at the lower end of the microwave reactor [34] emission. The steam [9] generated during the reaction enters the heat exchanger [10] through the steam outlet [23] at the upper end of the microwave reactor, and is reused after cooling. The specific steps are the same as in Example 1 (omitted), and...

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Abstract

In the field of water treatment, microwave catalytic oxidation is a process and device for treating refractory organic wastewater. The process includes: grid impurity removal [2], flocculation sedimentation [3], catalytic oxidation and steam [9] condensation, and its characteristics: catalytic oxidation is in It is carried out in a microwave reactor [17], the ratio of oxidant mass to wastewater COD mass is 1.0-20%, the temperature is lower than 100°C, and the residence time is 4-17min. The device includes: a raw water tank [14], a flow meter [5], a gas-liquid mixer [19], a heat exchanger [10], a pump [16] and a fan [13]. Its features: the microwave reactor [17] is composed of an inner reactor [6] and a microwave resonant cavity [7]. Advantages: (1) Low temperature and normal pressure; (2) Small footprint; (3) High degradation efficiency; (4) Simple operation and easy automation.

Description

technical field [0001] The invention relates to a novel water treatment technology and device combining microwave electromagnetic energy technology and catalytic oxidation technology, which is used for treating refractory organic waste water and belongs to the field of water treatment. Background technique [0002] The so-called refractory organic wastewater refers to refractory and poor biodegradability, which The value is very small, usually less than 0.2, and organic wastewater with high COD concentration or high chroma is also called high-concentration refractory organic wastewater. The amount of water is not very large, but the pollution load is very large, and it is difficult to achieve the expected treatment effect by using traditional biochemical methods. Its main source is papermaking, dyestuff, pharmaceutical, organic synthesis, petroleum refining, pesticide production and other industries' production wastewater. Once this kind of wastewater enters the environme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/02C02F9/04C02F9/08
Inventor 全夑薛大明赵雅芝陈硕卜龙利丛力王家平
Owner DALIAN UNIV OF TECH
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