SYSTEM FOR ZERO-DISCHARGE TREATMENT OF WASTEWATER GENERATED DURING RECYCLING PROCESS OF WASTE LITHIUM-ION BATTERIES

• Main Authors: MOON, Ra Kyung, PARK, Tae Shin, LEE, Chun Woo, KIM, Jangkyu, KIM, Sang Ug, SHIM, In Yong, YU, Keun Chan, CHOI, Seung Hyun
• Format: Patent
• Language: English; French; Korean
• Published: 07.03.2024
• Subjects: CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

Disclosed is a system for treating wastewater generated during a recycling process for recovering valuable metals from waste lithium-ion batteries. An aspect of the present invention provides a system for zero-discharge treatment of wastewater generated during recycling of waste lithium-ion batteries, the system comprising: a heavy metal removal unit configured to remove heavy metal components from wastewater generated during a valuable metal recovery process; an organic material oxidation unit configured to receive the wastewater, from which the heavy metal components have been removed, to remove organic materials from the wastewater; a chemical recovery unit configured to recover strong bases and strong acids from the wastewater, from which the organic materials have been removed by the organic material oxidation unit; a concentration unit configured to additionally remove salts from the wastewater, from which the strong bases and the strong acids have been recovered; and a reusable water production unit configured to filter the treatment water, from which the salts have been removed by the concentration unit, to produce reusable water. Un système de traitement d'eaux usées produites pendant un processus de recyclage pour récupérer des métaux de valeur à partir de batteries aux ions de lithium usagées est divulgué. Un aspect de la présente invention concerne un système de traitement à décharge nulle d'eaux usées produites pendant le recyclage de batteries aux ions de lithium usagées, le système comprenant : une unité de retrait de métaux lourds conçue pour retirer des composants de métaux lourds des eaux usées produites pendant un processus de récupération de métaux précieux ; une unité d'oxydation de matériau organique conçue pour recevoir les eaux usées, desquelles les composants de métaux lourds ont été retirés, pour retirer des matériaux organiques des eaux usées ; une unité de récupération chimique conçue pour récupérer des bases fortes et des acides forts à partir des eaux usées, desquelles les matériaux organiques ont été retirés par l'unité d'oxydation de matériau organique ; une unité de concentration conçue pour retirer en outre des sels des eaux usées, desquelles les bases fortes et les acides forts ont été récupérés ; et une unité de production d'eau réutilisable conçue pour filtrer l'eau de traitement, de laquelle les sels ont été retirés par l'unité de concentration, pour produire de l'eau réutilisable. 리튬 이온 폐배터리로부터 유가금속을 회수하기 위한 리사이클링 공정에서 발생되는 폐수를 처리하기 위한 시스템을 개시한다. 본 발명의 일 측면에 의하면, 유가금속 회수과정에서 발생된 폐수로부터 중금속 성분을 제거하는 중금속 제거부와, 상기 중금속 성분이 제거된 폐수를 유입받아 폐수 중의 유기물질을 제거하는 유기물 산화부, 상기 유기물 산화부에서 유기물질이 제거된 폐수로부터 강염기와 강산을 회수하는 케미칼 회수부, 상기 강염기와 강산이 회수된 폐수로부터 염을 추가적으로 제거하는 농축부 및 상기 농축부에서 염이 제거된 처리수를 여과 처리하여 재이용수로 생산하는 재이용수 생산부를 포함하는 것을 특징으로 하는 리튬 이온 폐배터리 리사이클링 폐수의 무방류 처리 시스템을 제공한다.