| 摘要 |
PURPOSE:To enable the simultaneous removal of the carbon dioxide and volatile org. halogen compd. incorporated into water contg. the carbon dioxide and volatile org. halogen compd. by treating the water in a spraying column. CONSTITUTION:The water contg. the carbon dioxide and the volatile org. halogen compd. is introduced, under an acidic condition, into a diffusion column 2 packed with a packing material to diffuse the carbon dioxide and the volatile org. halogen compd. The water is treated under the diffusion conditions of >=3m packing height of the packing material, <=50m/hour water passage rate and >=20Nm<3>/m<2> ventilation rate. As a result, the content of the volatile org. halogen compd. in the raw water which cannot be removed by an ion exchange treatment is drastically decreased and the treated water having high water quality is obtd. The carbon dioxide is removed as well together with the volatile org. halogen compd. in the diffusion column 2 and, therefore, the amt. of the caustic soda to be used for the purpose of regenerating the anion exchange resin of an anion exchange resin column 3 of a post-stage is decreased. |
