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Carbon dioxide free radical based oxygen-containing liquid deoxygenation method

A technology of carbon dioxide and free radicals, applied in chemical instruments and methods, liquid degassing, separation methods, etc., can solve the problems of heavy metals and slow oxygen removal rate, expensive equipment, oxygen removal rate, expensive catalyst, etc., to achieve management and easy to operate, easy to obtain, and realize the effect of automatic management control

Inactive Publication Date: 2013-10-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The invention provides a method for removing oxygen from oxygen-containing liquids based on carbon dioxide free radicals, which is a method of removing oxygen with mild conditions and no harmful substance residue, and solves the problems of complicated operation and expensive equipment in the existing physical method of oxygen removal technology And the problem of slow oxygen removal rate, as well as the problems of expensive catalyst, high energy consumption, heavy metal content and slow oxygen removal rate in chemical oxygen removal technology

Method used

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  • Carbon dioxide free radical based oxygen-containing liquid deoxygenation method
  • Carbon dioxide free radical based oxygen-containing liquid deoxygenation method
  • Carbon dioxide free radical based oxygen-containing liquid deoxygenation method

Examples

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Embodiment 1

[0046] A method for removing oxygen from an oxygen-containing liquid based on carbon dioxide free radicals, the method for removing oxygen utilizes figure 1 The columnar reaction tower shown (inner diameter is 30cm), the 25mM H 2 o 2 and 0.5M sodium formate through the metering pump respectively from H 2 o 2 Feed port 2 and formate feed port 3 are added, H 2 o 2 and sodium formate are dosed at a dose of 100mL / min, and the two are first fully mixed with the raw water (the initial concentration of dissolved oxygen is 7.8mg / L, and the flow rate is 7.4L / min) from the raw water inlet 1 in the mixer 4 and then come into contact At the bottom of the tower, through the water distribution plate 5 and the activated carbon catalytic bed 6 (the filling height is 105cm, the corresponding empty bed contact time is 10min, and the material is alkaline coal broken activated carbon, purchased from Gongyi City Ultra Clean Water Material Factory, activated carbon The particle size is 20-40 m...

Embodiment 2

[0049] use the same figure 1 The columnar reaction tower shown (inner diameter is 30cm), the 25mM H 2 o 2 and 0.55M sodium formate from the H 2 o 2 Feed port 2 and formate feed port 3 are added, H 2 o 2 and sodium formate are dosed at a dose of 100mL / min, and the two are first fully mixed with the raw water (the initial concentration of dissolved oxygen is 7.8mg / L, and the flow rate is 7.4L / min) from the raw water inlet 1 in the mixer 4 and then come into contact The bottom of the tower, then through the water distribution plate 5 and the activated carbon catalytic bed 6 (filling height 105cm, the corresponding empty bed contact time is 10min, the material is neutral activated carbon, purchased from Gongyi City Ultra Clean Water Material Factory, the activated carbon particle size is 30 mesh) contact and react to deoxidize, adjust the oxygen-containing liquid, sodium formate and H 2 o 2 The pH of the mixture is 7, the CO produced 2 The gas is discharged from the exhaus...

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Abstract

The invention discloses a carbon dioxide free radical based oxygen-containing liquid deoxygenation method which comprises the following steps: (1) an oxygen-containing liquid is mixed with formate and hydrogen peroxide so as to obtain a mixed liquor, wherein the molar concentration ratio of hydrogen peroxide to formate is 1:20-25; and (2) the mixed liquor enters a contact tower to undergo a contact reaction with an active carbon catalyst bed while empty bed contact time is 10-20min. The method provided by the invention is a deoxygenation method which has advantages of mild condition and no harmful substance residue. By the adoption of the method, problems of complex operation, expensive equipment and slow deoxygenation speed existing in a present physical method and problems of expensive catalyst, high energy consumption, heavy metal and slow deoxygenation speed existing in a chemical deoxygenation technology are solved. According to the invention, dissolved oxygen in water can be removed while salinity of water will not be increased. Thus, the influence on the water quality is little.

Description

technical field [0001] The invention relates to the technical field of deoxygenation, in particular to a method for deoxygenating an oxygen-containing liquid based on carbon dioxide free radicals. Background technique [0002] Oxygen is the second largest component in the air except nitrogen, with active chemical properties and strong oxidation ability. It can undergo oxidation-reduction reactions with metals, non-metals, and organic substances to generate relatively stable oxidation products. When the oxygen in the air dissolves in water, it is also easy to react with metals and organic substances, causing metal corrosion or organic substances to deteriorate. Therefore, many industries, such as industrial water supply, boiler water supply, food, electronics, metallurgy and other industries, need to remove oxygen from the air or water. [0003] At present, oxygen removal technology mainly includes physical method and chemical method. The physical methods include: vacuum d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/00
Inventor 刘小为张土乔邵煜张仪萍
Owner ZHEJIANG UNIV
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