Advanced oxidation multistage suspension bed reaction device and process

A reaction device and advanced oxidation technology, applied in the direction of oxidized water/sewage treatment, multi-stage water/sewage treatment, multi-stage water treatment, etc., can solve the problem of reduced utilization efficiency of hydrogen peroxide and ozone, low ozone utilization efficiency, and lower overall system Efficiency and other issues, to achieve the effect of improving energy and chemical utilization efficiency, improving energy and chemical utilization efficiency, and improving removal efficiency

Inactive Publication Date: 2018-10-09
BEIJING NEWBIOLINK TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent (Patent No. CN 106882866A) discloses a hydrogen peroxide synergistic ozone heterogeneous catalytic oxidation treatment wastewater technology, its water treatment effect is significantly improved compared with single hydrogen peroxide catalytic oxidation and ozone catalytic oxidation Reduced efficiency
Chinese patent (patent number CN 107445367A) discloses a method for the advanced treatment of printing and dyeing wastewater, which has a good treatment effect on the advanced treatment of printing and dyeing wastewater, but its multi-stage advanced oxidation technology adopts a simple series connection, and the ozone utilization efficiency is not high. Catalysts in the primary reaction unit or waste slag generated by the reaction flow into the secondary reaction unit, thereby reducing the overall efficiency of the system
Chinese patent (Patent No. CN 102115253A) discloses an advanced oxidation tower. The reaction device is compact in design and realizes the coordinated processing of multiple technologies in the same reaction device. Gradual catalytic oxidation process, resulting in low energy utilization
Chinese patent (patent number CN107473435A) discloses a catalytic oxidation method for the treatment of refractory industrial organic wastewater, but its catalyst adopts a honeycomb structure, and the reaction contact area is limited, so it is only suitable for low-concentration organic wastewater treatment
[0004] Although the existing advanced oxidation coupling or multi-stage strengthening process can improve the treatment effect of a single advanced oxidation process to a certain extent, it generally has the characteristics of poor synergistic effect, low energy utilization rate, easy loss or loss of catalyst, etc., which limits this process. Promotion of technology in the field of industrial wastewater treatment

Method used

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Experimental program
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Effect test

Embodiment 1

[0053] The production wastewater of a coal chemical enterprise has a raw water COD of 2700 mg / L and a pH value of 8.2. Using an advanced oxidation multi-stage suspension bed reaction device and process treatment of the present invention, the pH of the raw water is adjusted to 5.0; it enters the first-stage suspension bed reaction unit for treatment, and the catalyst particles are 50 mm in diameter and carry Fe 2 o 3 Activated carbon, air aeration at the bottom, the residence time of wastewater is 40 min; then enter the secondary suspension bed reaction unit for treatment, the catalyst particles are 40 mm in size and carry Fe 2 o 3 、TiO 2 Activated carbon, air aeration at the bottom, the residence time of wastewater is 40 min; then enter the three-stage suspended bed reaction unit for treatment, the catalyst particles are 25 mm in size and carry TiO 2 Activated carbon, air aeration at the bottom, hydrogen peroxide dosing concentration 10 mg / L, wastewater residence time 40 mi...

Embodiment 2

[0055] The production wastewater of a chemical synthesis pharmaceutical company, the raw water COD is 19800 mg / L, and the pH value is 6.5. Using an advanced oxidation multi-stage suspension bed reaction device and process treatment of the present invention, the pH of the raw water is adjusted to 5.0; it enters the first-stage suspension bed reaction unit for treatment, and the catalyst particles are 50 mm in diameter and carry Fe 2 o 3 Activated carbon, exposed to ozone at the bottom, the wastewater residence time is 50 min; then enters the secondary suspension bed reaction unit for treatment, the catalyst particles are 30 mm particle size loaded TiO 2 Activated carbon, ozone exposure at the bottom, hydrogen peroxide dosing concentration 20 mg / L, wastewater residence time 30 min; then enter the three-stage suspended bed reaction unit for treatment, catalyst particles with a particle size of 15 mm loaded with PtO 2 , IrO 2 Activated carbon, ozone exposure at the bottom, hydro...

Embodiment 3

[0057] Reverse osmosis concentrated water from a reclaimed water plant, raw water COD 820 mg / L, pH 7.1. Using an advanced oxidation multi-stage suspension bed reaction device and process treatment of the present invention, the pH of the raw water is adjusted to 5.5; it enters the first-stage suspension bed reaction unit for treatment, and the catalyst particles are 50 mm in diameter and carry Fe 2 o 3 Activated carbon, exposed to ozone at the bottom, the wastewater residence time is 60 minutes; then enters the secondary suspension bed reaction unit for treatment, the catalyst particles are 25 mm in diameter and carry Fe 2 o 3 、TiO 2 Activated carbon, ozone exposure at the bottom, hydrogen peroxide dosing concentration 15mg / L, wastewater residence time 60 min, effluent COD 45 mg / L after final treatment, removal rate 94.5%.

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Abstract

The invention discloses an advanced oxidation multistage suspension bed reaction device and process for treating difficulty decomposed organic waste water. The device mainly comprises a plurality of suspension bed reaction units, each unit comprises a water distribution area, a catalytic reaction area and a solid-liquid separation area, an effluent area and an effluent return system are arranged at the tail end of the last suspension bed reaction unit, the catalytic reaction area of each suspension bed reaction unit adopts different catalysts, and organic pollutant catalytic degradation capacity is enhanced step by step. When the difficulty decomposed organic waste water is treated by the device, the overall utilization efficiency of *OH is increased, effluent effects are improved, catalyst loss is reduced, operating cost is saved, and modular design and regulation of the whole device can be realized.

Description

technical field [0001] The invention relates to an advanced oxidation multi-stage suspended bed reaction device and a process for treating refractory organic waste water, belonging to the technical field of waste water treatment. Background technique [0002] With the development of my country's industry, a large amount of industrial wastewater is produced. This part of wastewater generally contains high concentrations of refractory organic pollutants. To treat this wastewater through traditional biochemical treatment processes, it is often necessary to greatly increase the hydraulic retention of biochemical treatment units. time, and the effluent effect is difficult to meet the increasingly stringent discharge standards. At present, for the treatment of industrial wastewater containing refractory organic pollutants, the most effective and common methods are advanced oxidation technologies such as Fenton oxidation, ozone catalytic oxidation, electrocatalytic oxidation, and we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/78C02F1/74C02F9/14C02F101/30
CPCC02F1/72C02F1/725C02F3/00C02F9/00C02F2101/30C02F2209/06C02F2209/08C02F2301/08
Inventor 刘鼎张杰李君占
Owner BEIJING NEWBIOLINK TECH DEV
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