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Method and device for efficiently catalyzing ozone to deeply treat sewage

A technology for advanced treatment and sewage installation, which is applied in chemical instruments and methods, oxidized water/sewage treatment, water/sewage treatment, etc. It can solve the problem of high engineering operation and maintenance costs, high investment and operating costs, and single aeration methods. question

Inactive Publication Date: 2021-05-11
HANGZHOU WATER TREATMENT TECH DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the common problems of ozone oxidation technology in engineering at present are: (1) the catalytic activity of ozone catalyst is poor, and the loss of catalyst is serious; (2) the dosage of ozone is large, and the investment cost and operating cost are high; (3) ozone There are few researches on the operation process and materials, resulting in low ozone efficiency and poor catalyst stability; (4) large catalyst dosage and short service life, etc.
[0004] The traditional catalytic ozonation device generally has a simple tower structure, the water distribution method is simple, and the aeration method is relatively single. Sand cores, titanium alloy aeration heads, jets, etc. are mostly used. The above methods have a high ozone utilization rate in engineering applications. Extremely low, resulting in a large amount of ozone being lost through gaseous and liquid forms and wasted, followed by high engineering operation and maintenance costs and poor treatment effects

Method used

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  • Method and device for efficiently catalyzing ozone to deeply treat sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]Nonofiltration in a chemical plant-2312.7mg / L, COD 732mg / L, color deep, yellow, taste heavy, pH adjustment is 9, water flow rate 90L / h, ozone dosage is 50mg / L, mix tank 3 and reaction tower 5 hydraulic stay The time is 20 min, using the catalyst γ-Al2O3 load iron manganese ozone catalyst, the filling ratio is 2: 1, the hydrogen peroxide invest ratio is 0.040%, and the water is sampled, and the water is 158 mg / L, the removal rate is 78.4%, And the decolorization effect is obvious, no odor. The catalyst of the catalytic reaction is γ-Al in 3-7 mm sizes.2O3Ball or particulate activated carbon is a catalyst for carrier load iron-manganese composite oxides, iron / manganese molbrass ratio of 1: 1-1: 20 impregnation fluid is impregnated, and produced after calcination by 200 ° C-500 ° C.

[0036]The steps are as follows:

[0037]Step 1, open the water pump, adjust the flow rate of 90L / h, when the water in the mix tank 3 is 30 L, open the micro-nano bubble device 2 and the ozon...

Embodiment 2

[0041]The water sample of a chemical plant is mainly alkalin, the chromaticity is high, pale yellow, 536mg / L COD, high content HCO3- / CO 3 - The pH adjustment is 9, the water flow rate is 120 l / h, the ozone dosage is 35 mg / L, the mixing tank 3 and the reaction column 5 hydraulic residence time is 25 min, and the self-made catalyst γ-Al2O3 is loaded with iron manganese ozone catalyst. The fill ratio is 2: 1, and the hydrogen peroxide invest ratio is 0.040%, and the water is sampled, 96 mg / L of water, and the removal rate is 82.1%, and the decolorization effect is obvious.

[0042] The step is the same as the above example 1.

Embodiment 3

[0044] Some biochemical secondary water, conductance is about 4.0 ms / m, yellow, pH 7.2, COD 485mg / L, pH adjustment is 9, water flow rate 90L / h, ozone dosage is 35mg / L, mix can 3 and reaction column 5 hydraulic residence time is 20 min, using homemade catalyst γ-Al 2 O 3 The loading ratio is 2: 1, and the hydrogen peroxide ratio is 0.010%, and the water is sampled, and the water is 78 mg / L, the removal rate is 84%, and the decolorization effect is obvious.

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Abstract

The invention belongs to the field of sewage treatment, and discloses a micro-nano ozone system coupled heterogeneous catalysis sewage advanced treatment method and device. The device used in the method comprises an ozone generator, a micro-nano aeration device, a mixing tank, a reaction tower filled with a high-efficiency catalyst, a tail breaking device, a hydrogen peroxide dosing pump and the like. A micro-nano ozone mixing system is used for uniformly mixing ozone and sewage in a mixing tank, then hydrogen peroxide is added according to actual conditions, the mixture enters a reaction tower filled with a high-efficiency catalyst, gas, liquid and solid phases in the tower are in more sufficient contact, and a high-efficiency catalytic ozonation effect is generated; the defects of low ozone dissolving efficiency and low utilization rate in a traditional ozone aeration process are overcome, specifically, a micro-nano ozone mixing system, high-efficiency catalyst catalysis and a hydrogen peroxide enhanced ozone technology are combined, the sewage treatment effects of high ozone utilization rate, high treatment efficiency, environment friendliness and energy conservation are achieved, and the method has a relatively good application prospect.

Description

Technical field[0001]In the field of advanced oxidation treatment of sewage, the present invention is specifically referred to as a micro-nano ozone system coupled non-uniformly catalytic ozone depth treatment of sewage and apparatus.Background technique[0002]In recent years, with the development of printing and dyeing, coal chemical, coking, petrochemical and other industries, wastewater containing various difficult degraded organics causes many ecological problems, and traditional biochemical technology is difficult to deal with difficult degraded organisms contained in these wastewater, ozone The oxidation process has been widely used in the field of wastewater treatment due to the advantages of high efficiency, wide application range, safe, efficient, environmental protection and simple operation.[0003]In the catalytic ozone process, ozone is catalyzed, has a hydroxyl radical, which has strong oxidative property, broad-spectrum, and significantly enhances the treatment effect of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/78C02F1/72
CPCC02F1/78C02F1/722C02F1/725
Inventor 熊威李想杨波吴雅琴张高旗李淑娜苗志伟
Owner HANGZHOU WATER TREATMENT TECH DEV CENT