Electrolytic apparatus for regenerating waste acid produced by acid cleaning of stainless steel, regeneration method therefor
An electrolysis device, stainless steel technology, applied in the field of electrolysis devices for the regeneration of waste acid after pickling of stainless steel, can solve the problems of uncertain application prospects, waste of resources, secondary pollution, etc., to improve sample processing speed and efficiency, and reduce volume , The effect of easy disassembly
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Embodiment 1
[0023] Example 1: waste acid regeneration electrolysis device
[0024] Waste acid electrolysis treatment device such as figure 1 As shown, the power supply 1 is a multi-channel input and output constant voltage power supply. The negative output terminal 2 of the power supply is connected to the cathode access terminal 4 of the electrolytic cell with a wire 3, and connected to the cathode electrode 10 of the electrolytic cell. The electrode is columnar, increasing The electrolytic reaction area, the electrolytic cell 6 is a sealed cup-shaped container, with a sample inlet 7 and a sample outlet 8 at both ends, which is convenient for sample entry and product output. The access terminals 11 are connected, and the entire flow path is finally connected to the positive output terminal 13 of the power supply through a wire 12. The waste acid 9 after stainless steel pickling is added to the electrolytic cell, and the electrolytic treatment can be carried out, and the intermittent trea...
Embodiment 2
[0026] (1) if Figure 4 As shown, a single columnar graphite cathode and a filamentary platinum anode are used. The electrolyte is waste acid solution A after pickling in a large stainless steel factory in my country. The main ion concentrations are: iron ion concentration 62g / L, nickel ion concentration 1.5g / L , the concentration of chromium ion is 4g / L, the concentration of fluoride ion is 1.5mol / L, electrolyze at a constant voltage of 3.5V for 15 hours to obtain solution A1;
[0027] (2) Pass the solution A1 through a flame atomic absorption instrument, and measure the content of Fe, Ni, Cr and other ions therein by flame method or graphite furnace method; use a fluoride ion selective electrode to measure the fluoride ion content therein, and calculate the electrolytic ion removal efficiency.
Embodiment 3
[0029] (1) take by weighing 10g of anhydrous sodium sulfate, dissolve in water and dilute to 200mL, just make catalyst S;
[0030] (2) if Figure 4 As shown, a single columnar graphite cathode and a filamentary platinum anode were used to electrolyze spent acid solution A at a constant voltage of 3.5V, and catalyst S was added for 15 hours of electrolysis to obtain solution A2;
[0031] Step 3 is the same as step (2) in Example 2, and the electrolytic metal ion removal efficiency is calculated.
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