물질흐름분석을 통한 폐윤활유 재활용 공정의 정제유 생산량 산정

Abstract

This paper presents the estimation of actual recyclable amounts and the evaluation of waste oil recycling processes at recycling facilities using material flow analysis (MFA). The estimation of actual recycling rates through the processes of waste lubricating oils is a very important subject not only in the point of view oil recycling efficiency by energy conversion processes but also in the perspective of the recycling technology level. In this study, the recycling processes and recycling rates of waste lubricating oil recycling facilities were evaluated by using a MFA approach, a total of 10 site visits and a total of 30 site questionnaires in Korea. The MFA methodology based on mass balance approach applied to identify the inputs and outputs of waste oils during the recycling processes at waste oil recycling facilities. It is necessary to determine the composition and flows of the input materials to be recycled and foreign substances in a waste recycling facility. A complete understanding of the waste flows in the processes along with the site visit and data surveys for the recycling facilities was required to develop a material flow for the processes and determine the process yield by different treatment methods (chemical distillation, vacuum distillation and high temperature pyrolysis). The results show that on average the process yields for chemical distillation, vacuum distillation, and high temperature pyrolysis were 89.9 ± 7.7%, 77.9 ± 16.1%, and 57.9 ± 9.3%, respectively. During the chemical distillation method, water in waste oils was a major fraction (> 50%), while the vacuum distillation method resulted oil large amounts of oil sludge produced during the recycling process. The process yields for different treatment methods depended upon several factors including the quality of incoming waste oils, the type and operating conditions of recycling processes that are applied to. Based on the material flow analysis in this study, the actual recycled amount of waste oil was estimated to be approximately 260,809 ton in 2011.