公开(公告)号：US20040104107A1

公开(公告)日：2004-06-03

申请号：US10722990

申请日：2003-11-26

申请人： SASAKURA ENGINEERING CO., LTD. ,  SHARP KABUSHIKI KAISHA

发明人： Junji Mizutani ,  Mitsuo Maeda ,  Tamito Mukaida ,  Yasushi Nishimura ,  Yutaka Shiomi ,  Koji Harada ,  Yoshio Tanimoto ,  Toshiaki Muratani

IPC分类号： B01D003/00 ,  C02F001/42 ,  F26B007/00

CPC分类号： C01B7/196 ,  B01D3/143 ,  B01D61/445 ,  B01J47/12 ,  C01B7/198 ,  C02F1/04 ,  C02F1/048 ,  C02F1/4693 ,  C02F1/66 ,  C02F9/00 ,  C02F2101/14 ,  C02F2103/346

摘要： The invention provides a hydrofluoric acid wastewater treatment method that achieves efficient recovery of hydrofluoric acid from hydrofluoric acid wastewater and also achieves sufficient reduction in the hydrofluoric acid concentration of the dehydrofluorinated water after treatment. The hydrofluoric acid wastewater treatment method comprises the following steps: a hydrofluoric acid concentration step (S1) comprising concentrating hydrofluoric acid wastewater by evaporation to produce a concentrated hydrofluoric acid water and a hydrofluoric acid-containing vapor; a dissolution step (S2) comprising bringing the hydrofluoric acid-containing vapor obtained in the hydrofluoric acid concentration step (S1) into contact with dissolution water to dissolve the vapor; a neutralization step (S3) comprising bringing the residual hydrofluoric acid-containing vapor left from the dissolution step (S2) into contact with an alkali to produce a neutralized liquid and a dehydrofluorinated vapor; and a condensation step (S4) comprising condensing the dehydrofluorinated vapor obtained in the neutralization step (S3) to produce condensed water.

摘要翻译： 本发明提供了一种氢氟酸废水处理方法，其可以从氢氟酸废水中有效回收氢氟酸，并且还可以实现处理后脱氟化氢水的氢氟酸浓度的充分降低。 氢氟酸废水处理方法包括以下步骤：氢氟酸浓缩步骤（S1），其包括通过蒸发浓缩氢氟酸废水以产生浓缩的氢氟酸水和含氢氟酸的蒸气; 溶解步骤（S2），包括使在氢氟酸浓缩步骤（S1）中获得的含氢氟酸蒸气与溶解水接触以溶解蒸气; 包括使来自溶解步骤（S2）的剩余的含氢氟酸蒸汽与碱接触以产生中和液和脱氟化氢气体的中和步骤（S3） 以及冷凝步骤（S4），其包括将在中和步骤（S3）中获得的脱氟化氢蒸汽冷凝以产生冷凝水。