Method of production smoke desulfurizer using spent sea bittern
A desulfurization agent and product technology, applied in separation methods, chemical instruments and methods, and separation of dispersed particles, to achieve low cost, high desulfurization activity, and promote development
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Embodiment 1
[0010] Take 1 liter of waste sea brine from a salt farm as raw material, in which the content of magnesium ions is 64g / liter, the content of sulfate radicals is 73g / liter, and the content of chloride ions is 180g / liter. First, add 210 g of calcium chloride solution with a concentration of 40% by weight, stir evenly and let stand, the sediment is further processed into high-quality gypsum after dehydration treatment (the water taken off is still returned to the clear liquid), and the clear liquid is driven into the bottom One reaction unit; in the next reaction unit, add 197g calcium hydroxide to the solution that has removed sulfate radicals, fully stir after 15 minutes into a continuous settling tank (residence time 150 minutes), after the overflow clear liquid is concentrated, A part is recycled to remove sulfate radicals, and the remaining part is used for extracting calcium chloride; about 387g of 40% by weight magnesium hydroxide slurry is obtained from the underflow, whic...
Embodiment 2
[0012] Take 1 liter of waste sea brine from a certain salt farm as raw material, in which the content of magnesium ions is 86g / liter, the content of sulfate radicals is 116g / liter, and the content of chloride ions is 140g / liter. First, add 319 g of calcium chloride solution with a concentration of 42% by weight, stir evenly, and leave it to stand. One reaction unit; In the next reaction unit, add 208g calcium hydroxide to the solution that has removed sulfate radicals, fully stir after 12 minutes into a continuous settling tank (residence time 180 minutes), after the overflow clear liquid is concentrated, A part is recycled to remove sulfate radicals, and the remaining part is used for extracting calcium chloride; about 415g of 50% by weight magnesium hydroxide slurry is obtained from the underflow, which is used for flue gas desulfurization, or is stored and transported after adding 0.6g of sodium fatty acid.
Embodiment 3
[0014] The side-line flue gas desulfurization industrial test was carried out on the flue gas of a 20-ton heating boiler in a certain unit, and the magnesium method was used to remove sulfur dioxide by spraying the empty tower. The desulfurization rate is 81%, and the slag production is 2kg / hour (about half is the dust in the flue gas, and the other is the unusable minerals in the light-burned magnesia), under the same operating conditions, using the example After the magnesium hydroxide slurry flue gas desulfurizer prepared in 1 is diluted with water (magnesium hydroxide concentration 0.16% by weight), it enters the desulfurization tower and carries out desulfurization operation. in dust). Operating conditions: flue gas volume is 10,000 standard cubic meters per hour, sulfur dioxide content in flue gas is 1,500 mg / cubic meter, flue gas temperature is 140°C, magnesium-sulfur ratio is 1.02, and liquid-gas ratio is 6 liters / cubic meter.
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