To provide a system for producing sodium chloride in which high-purity sodium chloride is purified by a simple treatment method.
The system for producing sodium chloride, in which sodium bicarbonate is added to exhaust gas, the obtained product is dissolved in water and a product-dissolved solution is purified to produce sodium chloride, is provided with: a decarbonation tank 4 for decomposing/removing a carbonate radical in the product-dissolved solution; a precipitating/removing means for precipitating/removing a sulfate radical, heavy metals and fluorine compounds from the product-dissolved solution from which the carbonate radical is removed in the decarbonation tank 4; a crystallization tank 10 for heating/concentrating a supernatant liquid, which is obtained by precipitating/removing the sulfate radical, heavy metals and fluorine compounds by the precipitating/removing means, to crystallize sodium chloride; and a liquid sending means 14 for returning/circulating a mother liquid, which is obtained by separating the sodium chloride crystallized in the crystallization tank 10, again into this system.
COPYRIGHT: (C)2008,JPO&INPIT
HIRANO YOSHINAO
OKADA YASUO
YOSHIDA AKIRA
DAISO CO LTD
DAISO ENGINEERING CO LTD
| JP2000511865A | 2000-09-12 | |||
| JP2006213535A | 2006-08-17 | |||
| JP2007230803A | 2007-09-13 | |||
| JPS6063329A | 1985-04-11 | |||
| JP2004359516A | 2004-12-24 |
Tatsuyuki Unuma