Fenton oxidation treatment device and method for treating high-COD waste liquid
A technology of Fenton oxidation and treatment device, applied in the field of water treatment, can solve the problems of increasing crystallization equipment, large investment, reduction efficiency and crystallization efficiency hindering application, etc.
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Embodiment 1
[0112] The waste liquid to be treated is taken from the cutting fluid of a machining factory in Shijiazhuang, and Table 1 is the water quality index data of the waste liquid.
[0113] Table 1 Water quality detection index data of a cutting fluid in Shijiazhuang
[0114]
[0115] A cutting fluid in Shijiazhuang has a large specificity, oil content, high COD, and is difficult to treat. It adopts demulsification + Fenton oxidation treatment. After demulsification, the COD of the waste fluid is reduced from 102900mg / L to 24605mg / L, and then Fenton oxidation is used for further treatment. , respectively inspected 5:5:5 (three dosing), 10:3:2 (three dosing), 10:5:0 (two dosing), 15:0:0 (one dosing) four In the case of adding hydrogen peroxide in different ways for Fenton oxidation, the results are as follows figure 2 shown.
[0116] Depend on figure 2 It can be seen that the oxidation effect of 10:3:2 (three dosing) is better than 10:0:0 (one dosing) and 10:5:0 (two dosing), a...
Embodiment 2
[0118] The waste liquid to be treated was taken from the waste mineral oil of a machining factory in Langfang. Table 2 is the water quality index data of the waste liquid.
[0119] Table 2 The detection index data of a waste mineral oil in Langfang
[0120]
[0121] A waste mineral oil in Langfang has a large specificity, oil content, and high COD. Using the Fenton oxidation process, the 4:3:3 (three dosing), 5:3:2 (three dosing), and 7:2: 1 (three dosing), 8:2:0 (two dosing), 10:0:0 (one dosing) five ways of adding hydrogen peroxide for Fenton oxidation, the results are as follows image 3 shown.
[0122] Depend on image 3 It can be seen that the oxidation effect of three additions is better than two additions and one addition, and the oxidation effect of 5:3:2 (three additions) is better than 4:3:3 (three additions) and 7:2 :1 (Three dosing), the removal rate of COD is higher.
Embodiment 3
[0124] A certain organic waste lye is obtained from the alkaline process of petrochemical industry, and its water quality testing index data are shown in Table 3.
[0125] Table 3 organic waste lye water quality detection index data
[0126]
[0127] The concentration of COD in organic waste lye is high, and Fenton oxidation is used to degrade COD.
[0128] The organic waste lye stored in the waste liquid storage container enters the first Fenton reaction container through the feed pump, and the waste sulfuric acid is added to the waste liquid by the acid feed pump, and the pH of the solution is adjusted to about 5, and the feed is fed by iron sulfate The pump adds ferrous sulfate heptahydrate to the waste liquid, and the dosage is 16.68kg / t.
[0129] by H 2 o 2 The feed pump adds hydrogen peroxide with a mass fraction of 30% to the first Fenton reaction vessel, the second Fenton reaction vessel and the third Fenton reaction vessel, and the dosage is 100L / t, 60L / t, 40L / t...
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