公开(公告)号：US20090101560A1

公开(公告)日：2009-04-23

申请号：US12211617

申请日：2008-09-16

申请人： Yasuteru SUMIDA ,  Tatsumi Kasahara ,  Kazutoshi Motegi ,  Hiroyuki Umezawa ,  Yasuyuki Kuwaki

发明人： Yasuteru SUMIDA ,  Tatsumi Kasahara ,  Kazutoshi Motegi ,  Hiroyuki Umezawa ,  Yasuyuki Kuwaki

IPC分类号： C01F11/22

CPC分类号： B01D71/26 ,  B01D61/147 ,  B01D65/02 ,  B01D67/0088 ,  B01D2311/04 ,  B01D2311/08 ,  B01D2315/06 ,  B01D2321/04 ,  B01D2321/185 ,  B01D2323/283 ,  C02F1/5236 ,  C02F1/66 ,  C02F11/121 ,  C02F2101/14 ,  C02F2103/346 ,  C02F2209/003 ,  C02F2209/06 ,  B01D2311/12 ,  B01D2311/2646 ,  B01D2311/2649

摘要： When hydrofluoric acid is introduced into a treatment tank in a pH adjustment unit, an alkali chemical is also introduced thereinto to set pH of first treated water in the treatment tank to be larger than pH of the wastewater. Moreover, a third path (circulating path) is connected to the treatment tank to circulate the first treated water. Then, pH adjustment is performed until second treated water having a pH value within a desired range is generated. The second treated water having the pH value adjusted to a desired value after the pH adjustment is transferred to the reaction tank for reaction with calcium. Thus, deterioration in treatment efficiency can be prevented. Moreover, the pH meter is provided in the circulating path and never comes into direct contact with the wastewater. Thus, the pH meter can be protected from the hydrofluoric acid.

摘要翻译： 当将氢氟酸引入pH调节单元中的处理槽中时，还引入碱性化学物质以使处理槽中的第一处理水的pH值大于废水的pH值。 此外，将第三路径（循环路径）连接到处理槽以使第一处理水循环。 然后，进行pH调节，直到产生pH值在期望范围内的第二处理水。 在pH调节后将pH值调节至所需值的第二处理水转移到反应罐中以与钙反应。 因此，可以防止治疗效率的劣化。 此外，pH计设置在循环路径中，不会与废水直接接触。 因此，可以保护pH计免于氢氟酸。