Hydroxyl radical preparation device, hydroxyl radical preparation method and hydroxyl radical solution
A preparation device and free radical technology, which is applied in chemical instruments and methods, water treatment of special compounds, water pollutants, etc., can solve the problem of cumbersome preparation or preparation steps of hydroxyl radicals, low production efficiency, and low concentration of hydroxyl radicals and other problems, to achieve the effect of reliable industrial application, simple and effective preparation
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[0043] According to another aspect of the present invention, there is also provided a method for preparing hydroxyl radicals, the preparation method comprising the following steps: S1, under pressurized conditions, dissolving at least part of ozone in the first part of hydrogen peroxide and reacting with it once , to obtain the reaction solution gas liquid; S2, pass the reaction solution gas liquid into the second part of hydrogen peroxide, and release unreacted ozone in the form of bubbles in the second part of hydrogen peroxide water under normal pressure conditions and undergo a secondary reaction to obtain Hydroxyl radical solution.
[0044] Pressurization can provide the pressure environment required for the primary reaction of ozone and hydrogen peroxide, and promote the ozone O 3 The primary reaction of consuming and generating hydroxyl radical OH can be carried forward more efficiently and continuously, and more ozone O 3 Continuously dissolved in hydrogen peroxide H ...
Embodiment 1
[0060] use figure 1 The setup shown produces hydroxyl radicals:
[0061] Ozone gas and the first part of hydrogen peroxide solution are introduced into the airtight dissolving tank through the ozone machine and the hydrogen peroxide storage tank, and O 3 +2H 2 o 2 →2HO·+2O 2 +H 2 O reacts to obtain the reaction solution gas liquid;
[0062] The reaction gas solution is released into the normal pressure dissolved gas pressure release tank through the pressure release part, and the unreacted ozone in the reaction gas solution is released to form an emulsified gas-water mixture with microbubbles with a cell diameter of 20-40 μm. Mix with the second part of hydrogen peroxide solution (the consumption of the second part of hydrogen peroxide is 4 times of the amount of ozone passed through in step S1), O 3 +4H 2 o 2 →2HO·+3O 2 +3H 2 O reacts to obtain a hydroxyl radical solution;
[0063] The obtained hydroxyl radical solution is cooled and stored in a hydroxyl radical st...
Embodiment 2
[0069] The only difference with Example 1 is that the weight concentration of the first and second parts of the hydrogen peroxide solution is 50%.
[0070] The weight concentration of the hydroxyl radical solution is about 30%.
[0071] Add the hydroxyl radical solution according to the feed ratio of sewage COD value and hydroxyl radical amount of 1:1, add 400mg\L 30% of the above hydroxyl radical solution to the industrial sewage with sewage COD of 400mg\L, fully stir After a certain reaction time, the pollutants in the industrial sewage are greatly degraded, and the COD concentration reaches a level of ≤40.
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