Electrochemical-chemical composite oxidation treatment method for seawater desulfurization recovery system
A composite oxidation and recovery system technology, applied in the direction of electrochemical water/sewage treatment, seawater treatment, oxidized water/sewage treatment, etc., can solve the problems of large area of aeration tank, low drainage pH, small absorption capacity, etc. Achieve high sulfite oxidation efficiency, high pH value of drainage, and low COD value
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Embodiment 1
[0040] like figure 1 As shown, a special equipment for realizing the method of the present invention includes: an aeration tank 10, the aeration tank is divided into a mixed aeration chamber, an aeration chamber and a mixing chamber, and in the mixed aeration chamber One end is provided with acidic seawater inlet 12 and the first fresh seawater inlet 14, is provided with up to standard seawater outlet 13 and the second fresh seawater inlet 15 at one end of said mixing chamber, and said acidic seawater inlet 12 is connected with absorption tower 1; Electrodes made of polyacrylonitrile carbon fiber material are also arranged in the mixed aeration chamber, which are respectively used as anode and cathode. A polyacrylonitrile carbon fiber tow 7 is fixed around the titanium wire 6 , and the anode and cathode are respectively connected to the positive pole and the negative pole of the DC power supply 4 through cables 5 .
Embodiment 2
[0042] First put the anode and cathode made of the polyacrylonitrile carbon fiber material into the aeration tank 10, connect the positive and negative poles of the DC power supply 4 with cables 5, and then mix the acidic seawater 2 discharged from the absorption tower with fresh seawater 3 Mixing once, in which the mixing ratio of acidic seawater 2 / fresh seawater 3 is controlled to 1:1~3, and then enters the aeration tank 10 for aeration and chemical oxidation, and at the same time turns on the DC power supply 4 to perform electrochemical Oxidation, where the working electrode potential of the anode is 0.8V SCE , the working electrode potential of the cathode is -0.6V SCE . Figure 5 For the above-mentioned combined oxidation treatment and comparative single aeration chemical oxidation treatment, the SO 3 2- The relationship between oxidation efficiency (A), pH (B) and oxidation time. Figure 5 In A, the composite oxidation reacted for 2 minutes with a mixing ratio of 1:2...
Embodiment 3
[0047] First put the anode and cathode made of the polyacrylonitrile carbon fiber material into the aeration tank 10, connect the positive and negative poles of the DC power supply 4 with cables 5 respectively, and then mix the acidic seawater 2 discharged from the absorption tower with fresh The seawater 3 is mixed once, and the mixing ratio of acidic seawater 2 / fresh seawater 3 is controlled to 1:2, and then enters the aeration tank 10 for aeration chemical oxidation, and at the same time, the DC power supply 4 is turned on, and the constant current control method is used for electrochemical oxidation , where the working electrode potential of the anode is 1.0V SCE , the working electrode potential of the cathode is -0.8V SCE ; After 2 min of the above combined oxidation treatment, SO 3 2- The oxidation rate can reach 91%, and the pH value is 5.91. After the combined oxidation treatment, the seawater is aerated separately for 2 minutes, not only the oxidation rate is furth...
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