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Floating bed ozone catalytic oxidation reactor and method for treating wastewater

An ozone catalytic oxidation and floating bed technology, applied in the direction of oxidized water/sewage treatment, etc., can solve the problems of poor gas-liquid-solid three-phase mass transfer efficiency, large system pressure loss, and large catalyst consumption, etc., to achieve a good floating state and save energy. The effect of small footprint and simple structure

Active Publication Date: 2017-12-08
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, both fluidized bed and fixed bed reactors have structural disadvantages
The fluidized bed ozone catalytic oxidation system has certain requirements on the density in order to ensure that the catalyst is in a fluidized state. A catalyst with a higher density requires a larger intake flow rate to blow the catalyst up for fluidization, which is likely to cause low ozone utilization in the system. , and high power consumption; fixed bed ozone catalytic oxidation system uses a large amount of catalyst, the system pressure loss is large, and it is easy to cause uneven flow and poor gas-liquid-solid three-phase mass transfer efficiency

Method used

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  • Floating bed ozone catalytic oxidation reactor and method for treating wastewater
  • Floating bed ozone catalytic oxidation reactor and method for treating wastewater
  • Floating bed ozone catalytic oxidation reactor and method for treating wastewater

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specific Embodiment approach 2

[0020] Embodiment 2: The gas passed into the reactor in this embodiment is the air that has not passed through the ozone generator. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0021] Embodiment 3: The catalyst in this embodiment is activated carbon fiber (PAN-ACF). Others are the same as in the first embodiment.

[0022] In order to detect the reactor of the present invention and method to the treatment effect of waste water, adopt fibrous flexible floating catalyst catalyst PAN-ACF and catalyst MnOx / PAN-ACF respectively, use figure 1 The reactor shown is used for the advanced treatment test of refractory cationic printing and dyeing wastewater. The wastewater is biochemical secondary effluent of a printing and dyeing factory with a chroma of 130-160 times and a COD of 140-160 mg / L, and the dosage of the catalyst is 1.0g / L. The wastewater is treated by the method of Embodiment 1, samples are taken at regular intervals, and the chromaticity and COD value of the water samples are measured. Experimental results such as image 3 and Figure 4 shown.

[0023] in, image 3Middle - □ - represents the graph of chroma removal rate in the reactor of the...

specific Embodiment approach 4

[0025] Embodiment 4: The reactor and catalyst used in this embodiment are the same as Embodiment 1 (see figure 1 , figure 2 ), the difference is that the actual wastewater is treated continuously.

[0026] This embodiment is mainly divided into the following steps: 1. On the porous ring plate (8-4), fix the catalyst (PAN- ACF / MnOx); 2. The wastewater storage tank is connected to the water inlet pipe (2) through the water pump, and the residence time of the wastewater in the reactor is controlled by adjusting the flow rate of the water pump; 3. The ozone mixed gas generated by the ozone generator passes through the ozone inlet pipe (6) Pass in and disperse the ozone mixed gas into uniform and tiny bubbles through the microporous gas diffusion plate (7). A large number of small bubbles and wastewater flow upward, driving the light, fibrous, flexible floating catalyst to float in the wastewater And float up and down to form a three-phase floating bed of gas, liquid and solid; ...

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Abstract

The invention relates to a floating bed ozone catalytic oxidation reactor using a flexible carrier catalyst and a method for treating waste water. A floating catalytic bed assembly is installed in the invented reactor, which consists of upper and lower fixing frames and hanging ropes. A porous ring plate is arranged on the lanyard, and one end of the flexible floating catalyst is fixed on the porous ring plate. The top of the reactor is equipped with a water distribution device, which is used to evenly distribute the waste water to various parts, and the bottom is equipped with an air inlet pipe and a water distributor, which are used to fully diffuse the gas. The present invention utilizes the light and flexible fibrous catalyst equipped on the floating bed to evenly distribute the catalyst in the reactor space, combined with the disturbance of ozone bubbles, improves the gas-solid-liquid mass transfer efficiency and ozone utilization rate, reduces the system resistance, and can Effectively decompose and mineralize refractory organic matter in wastewater.

Description

technical field [0001] The invention relates to an ozone catalytic reactor for treating wastewater and a method for treating wastewater, in particular to a floating bed catalytic oxidation reactor using a flexible carrier catalyst and a method for treating refractory organic pollutant wastewater. Background technique [0002] The ozone catalytic oxidation water treatment device is a three-phase reaction system of gas, solid and liquid. How to enhance the mass transfer capacity of the system and improve the catalytic effect of the catalyst without increasing the fluid resistance is the goal pursued by researchers. In recent years, many scholars have done a lot of research on fluidized bed and fixed bed loading new catalysts to degrade refractory organic pollutants. However, both fluidized bed and fixed bed reactors have structural disadvantages. In order to ensure that the catalyst is in a fluidized state, the fluidized bed ozone catalytic oxidation system has certain requir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/78
Inventor 尤宏贾玉红王维业柳锋迟明磊
Owner HARBIN INST OF TECH AT WEIHAI
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