A device for removing chloride ions from desulfurization wastewater by constructing a three-dimensional electrode system using hydrotalcite-based particle electrodes
A particle electrode and three-dimensional electrode technology, applied in battery electrodes, water/sewage treatment, gaseous effluent wastewater treatment, etc., can solve problems such as polluting water bodies, corroding desulfurization pipelines and equipment, affecting desulfurization efficiency and gypsum quality, and achieving reduction Operating costs, dosage reduction, and the effect of promoting electrochemical mass transfer
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Embodiment 1
[0032] Embodiment 1: take the three-dimensional electrolysis experimental device as the reaction device, take the iron plate as the positive and negative plates 2, the areas of the negative plate 2 and the positive plate 2 are 200 mm × 50 mm × 2 mm, and the distance between the positive and negative plates 2 is 1.0 cm, add MgAl-CO between the positive and negative plates 2 according to the solid-liquid ratio of 5g / L 3 CLDHs, add 1.8L of desulfurization wastewater into the liquid storage tank, in order to ensure that the three-dimensional particle electrode 3 can turbulently move between the positive and negative plates 2 of the reaction tank, adjust the circulating water flow rate to 2.0L / min, and the current density to 33mA / cm 2 The desulfurization wastewater was electrolyzed for 45 min under the same conditions. The results showed that when the electrolysis time was 30min, the removal rate of chloride ions reached 83.78%.
Embodiment 2
[0033] Embodiment 2: take the three-dimensional electrolysis experimental device as the reaction device, take the iron plate as the positive and negative plates 2, the area of the polar plates 2 is 200mm × 50 mm × 2 mm, the distance between the positive and negative plates 2 is 1.0 cm, and the Add 5g / L of ZnAl-NO between the two plates 3 LDHs, add 1.8L desulfurization wastewater to the liquid storage tank, adjust the circulating water flow rate to 2.0L / min, and the current density to 44mA / cm 2 The desulfurization wastewater was electrolyzed for 45 min under the same conditions. The results showed that when the electrolysis time was 30min, the removal rate of chloride ions could reach 83.01%.
Embodiment 3
[0034]Embodiment 3: take the three-dimensional electrolysis experimental device as the reaction device, take the iron plate as the positive and negative plates 2, the area of the polar plates 2 is 200 mm × 50 mm × 2 mm, the distance between the positive and negative plates 2 is 1.0 cm, and the Add 3g / L Fe prepared between the two plates 3 O 4 @ZnAl-NO 3 LDHs, add 1.8L desulfurization wastewater to the storage tank, adjust the circulating water flow rate to 2.5L / min, and the current density to 44mA / cm 2 The desulfurization wastewater was electrolyzed for 45 min under the same conditions. The results showed that when the electrolysis time was 15min, the removal rate of chloride ions could reach 87.70%.
[0035] The experimental waste liquid after electrolysis is filtered to obtain a mixture of the three-dimensional particle electrode 3 after electrolysis and the flocs produced during the electrolysis process, and then the mixture is roasted and dried for use. 3 O 4 @ZnAl-...
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