Dilute amine liquid recovery method and device

• Main Authors: ZHAO XINGLEI, ZHONG ZHENCHENG, XIONG RIHUA, CHENG ZIHONG, YU SHUANG'EN
• Format: Patent
• Language: Chinese; English
• Published: 29.06.2021
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The invention provides a dilute amine liquid recovery method and device. The method comprises the following steps: providing a dilute amine liquid to be recovered; carrying out acidification pretreatment on the dilute amine liquid to obtain a pretreated liquid; concentrating the pretreated liquid by adopting a reverse osmosis membrane device to obtain a concentrated liquid; and recovering the concentrated liquid to obtain a recovered amine liquid. According to the invention, the dilute amine liquid is concentrated by adopting the reverse osmosis membrane, only electric energy is consumed in the process, the operation is simple, and the treated produced water contains a very small amount of organic matters and is easy to treat and recycle in the later period. 本发明提供一种稀胺液的回收方法和装置，所述方法包括如下步骤：提供待回收的稀胺液；对所述稀胺液进行酸化预处理；得到预处理液；采用反渗透膜装置对所述预处理液进行浓缩；得到浓缩液；所述浓缩液进行回收，得到回收的胺液。本发明采用反渗透膜对稀胺液进行浓缩，过程中只需要消耗电能，操作简单，且处理后的产水内含极少量的有机物，易于后期的处理、回用。