Labyrinth type current-crossing and bubbling photocatalytic reaction device and method for treating organic waste water thereby

A photocatalytic reaction and photocatalytic reactor technology, which is applied in the field of high-efficiency photocatalytic reaction devices and organic wastewater treatment fields, can solve the problems of difficult recovery and regeneration of catalysts, reducing the effective volume of the reactor, and low reactor efficiency, etc. Effective utilization, simple structure, effect of increasing residence time

Inactive Publication Date: 2006-11-22
TAIYUAN UNIV OF TECH
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Problems solved by technology

At present, researchers generally use an annular fluidized bed reactor with a built-in light source to achieve this purpose, but this type of reactor needs to be equipped with an internal cooling system to dissipate heat, and the combination of the light source (ultraviolet lamp) and the cooling system must be considered when designing and scaling up. It is complex and reduces the effective volume of the reactor. The light energy needs to pass

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  • Labyrinth type current-crossing and bubbling photocatalytic reaction device and method for treating organic waste water thereby
  • Labyrinth type current-crossing and bubbling photocatalytic reaction device and method for treating organic waste water thereby
  • Labyrinth type current-crossing and bubbling photocatalytic reaction device and method for treating organic waste water thereby

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Embodiment 1

[0022] The device of the present invention is mainly composed of a main body of a labyrinth cross-flow bubbling photocatalytic reactor 1 , an external solid-liquid separator 7 , a circulation system and a parallel light source 12 above the reactor 1 .

[0023] The cross section of the main body of the reactor 1 of the present invention is circular or rectangular. A porous gas distribution plate 2 is installed in the reactor 1. The gas pre-distribution section is located below the distribution plate 2 and the reaction zone is located above it. A plurality of parallel baffles 3 are vertically arranged above the internal distribution plate 2 of the reactor 1 to form a liquid phase labyrinth channel. The parallel baffles 3 are rectangular, and the lower end is fixed on the parallel distribution plate 2. One end of the side of the parallel baffles 2 is connected and fixed with the wall of the reactor 1, and the other end is kept at a certain distance from the wall of the reactor 1 t...

Embodiment 2

[0025] A method for treating organic wastewater with a labyrinth cross-flow bubbling photocatalytic reaction device is as follows:

[0026] (1) Photocatalytic degradation of phenol wastewater by gap cycle operation

[0027] figure 1 As shown in, the supported TiO with granular activated carbon as the carrier 2 (Germany Degussa P25, which is loaded on the surface of granular activated carbon by impregnation method to make TiO 2 Support film, TiO 2 The amount of active components is about 0.2%wt of the amount of liquid to be treated) The photocatalyst is put into a circular reactor 1 with an effective volume of 0.8L, and 1000mL of simulated organic wastewater with an initial concentration of phenol of 20mg / L is added in the circulating water tank 11 , a 375W high-pressure mercury lamp is used to generate a parallel light source through the reflection of the lampshade, and the light intensity at the liquid surface of reactor 1 is 8mW / cm 2. Open the valve 18, and the above-me...

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Abstract

The invention relates to a labyrinth cross flow bubbling light-catalyzed reaction device and the method for treating organic wastewater. It is characterized in that the reactor is equipped with a labyrinth liquid passage formed by parallel baffle plate, gas containing oxygen entering from bottom of reactor into distributing plate and bubble into reacting area, organic wastewater flows from liquid inlet pipe on upper of distributing plate and reactor side face, flows in labyrinth reacting area along baffle plate and contacts with rising bubble, and the particular light catalyst floats in gas and liquid mixing phase. The light catalystic reaction proceeds among gas, liquid and solid reacts phase under irradiation of ultraviolet light from upper side of reactor, the organic matter is degraded, the yielding water is separated through outer solid-liquid separator and the light catalytic reaction is continous proceeded under pump action. The invention is characterized by simple construction, convenient operation, long liquid retention time for thorough contact time of liquid and solid, high mass transfer efficiency and light catalytic reaction efficiency, no limit from light source for reactor design enlargement and easy for industrial application.

Description

technical field [0001] The invention relates to a high-efficiency photocatalytic reaction device and its organic wastewater treatment method, in particular to a labyrinth cross-flow bubbling photocatalytic reaction device and its organic wastewater treatment method technical background [0002] Photocatalytic oxidation technology uses ultraviolet light or near ultraviolet light to activate semiconductors (usually TiO 2 ) The photogenerated holes on the valence band generate hydroxyl radicals with strong oxidizing ability in water, which completely mineralizes organic pollutants that are difficult to degrade in water. The degradation process can be carried out at normal temperature and pressure and the substrate is almost non-selective , In addition, this method does not need to add chemical reagents and has no secondary pollution, so it has become the research frontier and development hotspot of current water purification technology at home and abroad. [0003] Reactor, lig...

Claims

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Application Information

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IPC IPC(8): B01J8/18B01J19/12C02F1/30C02F1/72
CPCY02W10/37
Inventor 郝晓刚张忠林罗善霞樊彩梅刘世斌孙彦平
Owner TAIYUAN UNIV OF TECH
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