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Received November 17, 2021
Accepted December 14, 2021
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통합 하이브리드시스템을 활용한 폐가스 처리 거동
Time-Dependent Behavior of Waste-Air Treatment Using Integrated Hybrid System
1대구대학교 화학공학과, 38453 경상북도 경산시 진량읍 내리리 15 2산업 및 환경폐가스연구소, 38453 경상북도 경산시 진량읍 내리리 15
1Department of Chemical Engineering, Daegu University, 15 Naeri-ri, Jillyang-eup, Kyungsan-si, Kyungbuk, 38453, Korea 2Research Institute for Industrial and Environmental Waste Air Treatment, 15 Naeri-ri, Jillyang-eup, Kyungsan-si, Kyungbuk, 38453, Korea
khlim@daegu.ac.kr
Korean Chemical Engineering Research, February 2022, 60(1), 100-115(16), 10.9713/kcer.2022.60.1.100 Epub 24 January 2022
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Abstract
교대로 운전되는 광촉매반응기 공정 및 바이오필터 공정[전통적 바이오필터(L 반응기)와 두 개의 유닛(Rup 및 Rdn)을 가지는 개선된 바이오필터(R 반응기)]으로 구성된 통합 하이브리드시스템(통합처리시스템)에서 에탄올과 황화수소를 동시 함유한 폐가스 처리를 성공적으로 수행하였다. 통합처리시스템의 운전 단계로서 HA1, HA2 및. 폐가스의 공급 방향이 뒤바뀐 HA3T stage의 광촉매 공정에서 각각 55, 50 및 45%의 에탄올 제거효율과 각각 70, 60 및 37%의 황화 수소 제거효율을 보였다. 특히, HA3T stage에서 통합처리시스템으로 공급되는 폐가스(feed)의 황화수소 농도가 10 ppmv에서 20 ppmv로 급증함에 따른 황화수소 부하량의 증가로 인하여 특히 황화수소 제거효율의 급격한 감소를 관찰하였다. 통합처리시스템의 HA1, HB1, HA2 및 HB2 stage 및 HA3T stage의 초반에, 개선된 바이오필터(R 반응기)의 각 유닛에 설치한 sampling 구들의 에탄올의 파과 순서 및 에탄올 처리효율의 크기 순서는, HA3T stage 후반과 HB3T stage의 경우에서 각각 거꾸로 바뀌었다. 한편 개선된 바이오필터(R 반응기)에서 황화수소의 경우는 파과 정도가 에탄올의 경우만큼 두드러지지는 않았으나 비슷한 추세가 관찰되었다.
In this study, integrated hybrid system (IHS) composed of two alternatively-operating UV/photocatalytic reactor (AOPR) process and biofilter processes of a biofilter system having two units (i.e., Rup and Rdn) with an improved design (R reactor) and a conventional biofilter (L reactor) was constructed, and its transient behavior was observed to perform the successful treatment of waste air containing ethanol and hydrogen sulfide (H2S). At the IHS-operating stages of HA1, HA2 and HA3T of reversed feed direction, the AOPR process showed not only ethanol-removal efficiencies of 55, 50 and 45%, respectively, but also H2S-removal efficiencies of 70, 60 and 37%, respectively. In particular, a drastic decrease of H2S-removal efficiency at the stage of HA3T was observed due to a doubling of H2S-inlet concentration fed to AOPR from 10 ppmv to 20 ppmv at the stage of HA3T. The order of ethanol-breakthroughs and the order of the magnitude of ethanol-removal efficiencies at the sampling ports of each unit of R reactor at the stages of HA1, HB1, HA2, HB2, and the first half of HA3T, were reversed, respectively, at the stages of the second half of HA3T and HB3T. In case of H2S, R reactor did not show H2S-breakthrough as prominent as the ethanol-breakthrough, but showed the trend similar to the ethanol-breakthrough.
Keywords
References
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