Method for purifying flue gas desulfurization agent
A purification treatment and desulfurization agent technology, applied in gas treatment, chemical instruments and methods, gaseous effluent wastewater treatment, etc., can solve the problems of poor removal of impurity ions, etc., to overcome the low load of resin deacidification radicals and reduce sodium ions Concentration, improve the effect of load removal
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Embodiment 1
[0037] Flue gas desulfurization of a sintering machine in a large iron and steel plant, the sulfur dioxide content in the sintering flue gas is 3000-7000mg / Nm 3 , the concentration of sulfur trioxide is 200~350mg / Nm 3, the dust content is 50~100mg / m 3 , The flue dust contains iron, lead, magnesium, cadmium, cobalt, chromium, calcium and other elements. After the flue gas desulfurization agent solution is recycled for a long time, sulfate, iron, chlorine and other ions in the solution are accumulated. The desulfurization effect of the desulfurization agent solution Reduced, the concentration of sulfur dioxide at the flue gas inlet is 6000mg / m 3 , the desulfurization efficiency is 92.15%.
[0038] Purify the desulfurizer solution, wherein the sulfate concentration in the desulfurizer solution is 125g / L, the sodium ion concentration is 26g / L, and the concentrations of other ions are shown in Table 1 below.
[0039] The temperature of the desulfurizer solution is reduced to 15°...
Embodiment 2
[0044] Flue gas desulfurization of a non-ferrous ring collection, the sulfur dioxide content in the flue gas is 1000-3000mg / Nm 3 , the concentration of sulfur trioxide is 200~500mg / Nm 3 , the dust content is 20~100mg / m 3 , The soot contains iron, lead, magnesium, cadmium, cobalt, chromium, calcium and other elements. After the flue gas desulfurizer solution has been recycled for a long time, sulfate, iron, chlorine and other ions in the solution have accumulated, and the desulfurization effect of the desulfurizer solution has decreased. The concentration of sulfur dioxide at the flue gas inlet is 3000mg / m 3 , the desulfurization efficiency is 93.5%.
[0045] Purify the desulfurizer solution, wherein the sulfate concentration in the desulfurizer solution is 95g / L, the sodium ion concentration is 20g / L, and the concentrations of other ions are shown in Table 2 below.
[0046] The temperature of the desulfurizer solution is lowered to 17°C through the heat exchange system, and...
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