第11期王彦题等．水处理装置扩容改造经济技术分析——·59—— practical production．Technicalnecessity and practic址feasibU“yOfreplacingsulfuricacid with hydrochloric acid as[he cationite regenerant and replacing the single-cdl floating bed with the doub[e-cell ebuUated bed were discussed．Both economic and social benefits were an址yzed．The result showed that[he annua[ production costs can be saved byRMB￥．Keywords water treatment plant， des址ination， teehnic址 revamping， ion exchange equipment， regenerant，sulfUric acid，hydrochloric acid，calcitim sUlfa[e，economic beneh[s画巫回·

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