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Method for carrying water treatment by active carbon fiber-ozone oxidization combination

A technology of activated carbon fiber and ozone oxidation, which is applied in the direction of oxidation water/sewage treatment, adsorption water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., and can solve the problem of reduced degradation performance of activated carbon, low pertinence of special water sources, and process conditions and complex equipment, etc., to achieve the effect of increasing ozone utilization rate, improving ozonation efficiency, and low cost

Inactive Publication Date: 2008-02-20
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still the following problems in practical application: First, the activated carbon used is ordinary activated carbon, and the degradation performance of activated carbon will continue to decrease with the prolongation of the service life during use; second, the water quality to be treated must be pre-treated or The water quality contains trace amounts of organic pollutants; the third is the integration of two unit structures in the process, which makes the process conditions and equipment complex and increases the operating cost; the fourth is targeted at special water sources (such as water quality containing higher phenolic compounds) Not strong, the processing effect is not ideal enough, it is difficult to meet the actual needs

Method used

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  • Method for carrying water treatment by active carbon fiber-ozone oxidization combination
  • Method for carrying water treatment by active carbon fiber-ozone oxidization combination

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Effect test

Embodiment 1

[0023] Embodiment 1: the modification treatment of active carbon fiber

[0024] Put it into the carbonization activation furnace for secondary activation to expand its pore size to adjust the pore structure of the activated carbon, and modify the surface of the carbon by acid-base treatment. During the activation process, pass nitrogen gas as a protective gas, and when the temperature rises to 800°C, pass water vapor to activate for 40 minutes. In addition to water vapor, you can also choose carbon dioxide, ammonia, magnesium nitrate, iron nitrate and other metal salts as activators, either using one of the activators for activation, or using two activators in combination. activation. Because the molecular diameter of phenolic compounds in wastewater is in the range of 0.7-1nm, only the pore size on the surface of activated carbon is larger than 1nm can efficiently adsorb these organic substances. Therefore, the purpose of activation is to expand the pore size of the activat...

Embodiment 2

[0025] Embodiment 2: Utilize the high efficiency of degrading phenolic compound waste water after the activated carbon fiber in embodiment 1 is modified.

[0026] The device for catalytic ozonation of active carbon fiber to degrade organic pollutants in water is an ozonation reactor with sand core and air distribution. The gas source can be compressed air or oxygen, which enters the ozone generator after drying and filtering. The gas distribution device of the ozone reactor is a sand core at the bottom. When the ozonated gas passes through, tiny bubbles are generated to accelerate the dissolution of the gas phase ozone molecules into the water. In order to ensure better fluidization of activated carbon fibers in the ozone reactor, so as to fully contact with phenolic substances in water and dissolved ozone, activated carbon fibers are cut into blocks of different sizes according to the diameter of the reactor. The presence of activated carbon fibers increases the residence ti...

Embodiment 3

[0030] Embodiment 3: Utilize the high efficiency of degrading polyoxyethylene fatty alcohol ether wastewater after the activated carbon fiber in embodiment 1 is modified.

[0031]The flocculants of polyaluminum chloride and polyferric sulfate are added to flocculate and settle the suspended solids in the wastewater, and at the same time, part of the organic matter can be removed. According to the different flocculation effects of various flocculants, there are different dosages. Taking polyaluminum chloride as an example, according to the content of organic matter in water, the amount of flocculant added is 200-800mg / L, which can remove 10-18% of organic matter in water. The addition of flocculant has an optimal amount, too much or too little will make the flocculation effect worse.

[0032] The device for degrading organic pollutants in water by ozonation of activated carbon fiber is an ozonation reactor with sand core and air distribution. The gas source can be compressed ...

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Abstract

The invention relates to a water combined treatment method of activated carbon fiber and ozone oxidation in water treatment field. The technic proposal is that: the bottom of a reactor is provided with an air distribution board which is connected with an ozonizer and the upper part of the air distribution board is provided with single layer or multi-layer modified activated carbon fiber; activated carbon fiber in the reactor accounting for the amount of waster water is 1-50g / L, ozonization gas concentration is 5-12mg / L and the treatment time is 5-90min; the modification of activated carbon fiber is to put active carbon into a charing activation furnace to be activated secondarily. During the activation process, apart from vapor, carbon dioxide, alkaline gas and one or two sorts of metal salts are chosen as activating agent to increase the ratio of aperture of larger than 0.7-2.5nm on the active carbon surface. The invention can degrade the organic contaminant into carbon dioxide, water and nontoxic byproducts and has the advantages of high efficiency, low cost, simple process, easy operation and no secondary pollution towards the environment.

Description

technical field [0001] The invention belongs to the application of catalytic ozonation technology in the field of water treatment, and in particular relates to a water treatment method combined with activated carbon fiber and ozonation. Background technique [0002] Environmental protection and water resources management have attracted great attention from the Chinese government. Revolving around the important subject of environmental protection and water treatment, relevant institutions have carried out a lot of research and application. The traditional ozone oxidation method has been widely used in water treatment. However, the solubility of ozone in water is relatively low, and its stability is poor, so that the treatment efficiency of ozonation is relatively low, and the pollutants cannot be completely mineralized, so the application in water treatment has been limited. In order to strengthen the effect of ozone treatment and improve the utilization rate and degradation...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/78C02F1/52
Inventor 郑经堂曲险峰李涛江张延宗赵玉翠蔡升于维钊刘颖李石徐桂明
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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