Efficient Fenton-like technology beneficial to repeated reaction

A Fenton-like process technology, applied in the field of high-efficiency Fenton-like processes, can solve problems such as catalyst recovery, catalyst loss, and wear and tear of catalytic treatment equipment, and achieve the effects of reducing processing costs, stable properties, and reducing reaction operating costs

Active Publication Date: 2016-11-16
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems faced by heterogeneous Fenton-like catalysts and their use methods in the prior art, the inventors found in the process of practical application that in heterogeneous Fenton-like reactions, it is often necessary for the catalyst to maintain a certain mechanical strength, but it will Causes wear and tear of catalytic treatment equipment, and the catalyst itself will also cause losses; and the catalyst added to the wastewater has recycling problems

Method used

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  • Efficient Fenton-like technology beneficial to repeated reaction
  • Efficient Fenton-like technology beneficial to repeated reaction
  • Efficient Fenton-like technology beneficial to repeated reaction

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] 1. Preparation of catalyst particles: Put the powders of alumina, magnesia, and titanium dioxide into a ball mill at a mass ratio of 1:1:1, grind and mix them, put them in a muffle furnace at 800-1000℃ for 4-8h, and intercept 100 meshes Particles between ~200 mesh.

[0037] 2. Catalyst thermal spraying: The catalyst particles are sprayed on the surface of the turbine by thermal spraying technology. The spraying temperature is set to 350-500℃, the spraying pressure is set to 0.6-0.8MPa, the spraying distance is set to 15-25mm, and the powder feeding amount is set to 5. -20g / min.

[0038] 3. Fenton-like process: Put the turbine sprayed with catalyst particles into the container, add hydrogen peroxide (30%) in a ratio of 1:100 to 1:200 wastewater (volume ratio), and add hydrogen peroxide evenly during the reaction. The rotation speed is set to 100~180rpm, and the processing time of similar Fenton process is 1~2h.

[0039] 4. Determination of water quality indicators: To determi...

Embodiment 1

[0042] 1. Put the powders of alumina, magnesia, and titanium dioxide into a ball mill at a mass ratio of 1:1:1, grind and mix them, put them in a muffle furnace at 800°C for 6 hours, and intercept particles between 100 mesh and 200 mesh. The catalyst particles are sprayed on the surface of the turbine by thermal spraying technology, the spraying temperature is set to 400℃, the spraying pressure is set to 0.7MPa, the spraying distance is set to 20mm, and the powder feeding rate is set to 12g / min.

[0043] 2. The desulfurization wastewater taken from Huadian Laizhou Power Plant has a conductivity of 23.1mS / cm, an initial pH of 8.1, and an initial TOC value of 2205. The desulfurization wastewater is introduced into the reaction vessel, 30% hydrogen peroxide is evenly added during the reaction, and the turbine speed is set to 180 rpm.

[0044] 3. The reaction time is set to 2h. After the reaction is over, the supernatant is taken for analysis.

[0045] Water quality determination: TOC a...

Embodiment 2

[0050] 1. The preparation steps are the same as in Example 1.

[0051] 2. The domestic wastewater taken from Huadian Laizhou Power Plant has a conductivity of 4.11mS / cm, an initial pH of 8.6, and an initial TOC value of 1871.

[0052] 3. The processing and analysis process are the same as in Example 1. The results of water quality measurement are shown in Table 2.

[0053] Table 2 Water quality measurement results of Example 2

[0054]

[0055] The invention mainly realizes the rapid removal of organic matter in high-salt wastewater by constructing equipment that can efficiently improve the Fenton-like effect and an advanced Fenton-like process. The process loads the catalyst on the surface of the turbine, which not only can efficiently improve hydrogen peroxide The function of oxidation ability, and can avoid the friction between the catalyst and the reactor wall, prevent the catalyst from being destroyed, and maintain the catalyst activity of the catalyst. At the same time, the pro...

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Abstract

The invention discloses an efficient Fenton-like technology beneficial to repeated reaction. Composite oxide particles are used as the catalyst, the catalyst particles are sprayed on the surface of a turbine through the thermal spraying method, the catalyst on the surface of the turbine can make full contact with hydrogen peroxide in wastewater under the stirring function of the turbine, flowing of water flow in a container is promoted, accordingly efficiency of the Fenton-like technology can be greatly improved, and separation of the catalyst and a system is convenient. The technology greatly improves utilization efficiency of hydrogen peroxide, and accordingly efficiency of the Fenton-like technology can be remarkably improved. Besides, the catalyst is loaded on the surface of the turbine, separation of the catalyst is convenient after reaction, friction between the turbine and the catalyst is avoided, efficiency of the Fenton-like technology is guaranteed, separation of the reaction system and the catalyst is convenient, and because friction is avoided, the service life of the catalyst and a device is prolonged.

Description

Technical field [0001] The invention belongs to the field of water treatment, in particular to the field of heterogeneous Fenton-like catalysts and enhanced Fenton-like treatment process effects, and relates to an efficient Fenton-like process that is easy to repeat reactions. Background technique [0002] With the rapid development of industry, a lot of refractory wastewater is produced, which enters environmental water bodies, and the sewage existing in environmental water bodies has the characteristics of refractory and harmful to human health. Therefore, treatment of refractory industrial wastewater causes This has attracted the attention of scholars. [0003] Advanced oxidation technology is widely used in the treatment of refractory pollution. Fenton reaction is an important water treatment technology. The classic Fenton reaction uses Fe 2+ Reacts with hydrogen peroxide to produce hydroxyl radicals to deeply degrade organic matter in water, which can achieve non-selective tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/04C02F1/72
CPCB01J23/002B01J23/04B01J35/023B01J2523/00C02F1/722C02F1/725C02F2209/08C02F2209/20C02F2305/026B01J2523/22B01J2523/31B01J2523/47
Inventor 吴中杰刘国强许立国张燕侯亚琴高坚李贵海
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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