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Method for desulfurization of combustion exhaust gas

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专利汇可以提供Method for desulfurization of combustion exhaust gas专利检索,专利查询,专利分析的服务。并且PURPOSE: To carry out the title desulfurization without receiving the affection of HF and Al within dust by adding Na
2 CO
3 to a CaSO
3 containing slurry and an adsorbing agent slurry to adjust pH when HF concentration of the said slurry is high.
CONSTITUTION: In an absorbing procedure 1 for converting SO
x to CaSO
3 by contacting a combustion exhaust gas containing dust contaiing SO
x , HF, Al with a CaCO
3 or Ca(OH)
2 slurry, Na
2 CO
3 3 is added to adjust pH of a slurry within a procedure 1 to above 5 when HF concentration within a slurry is above 0.005 mole/l. On the other hand, a CaSO
3 slurry is oxidized by air in an oxidizing procedure 4 to prepare a gypsum slurry and, in case of preparing a slurry of an adsorbing agent 10 of CaCO
3 or Ca(OH)
2 in a slurry preparing procedure 9 by using a mother liquid 8 obtained by separating gypsum 7 in a gypsum separating procedure 6, the pH thereof is adjusted above 5 by adding Na
2 CO
3 .
COPYRIGHT: (C)1980,JPO&Japio,下面是Method for desulfurization of combustion exhaust gas专利的具体信息内容。

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