Authentication of emission monitoring data and optimization of desulfurization in the molybdenum roasting process based
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RESEARCH ARTICLE
Authentication of emission monitoring data and optimization of desulfurization in the molybdenum roasting process based on BAT-OOPN and the response surface method Yan Zhao 1 & Jiaqi Zhang 2
&
Huixuan Guo 2 & Xiaomin Hu 1 & Qiuli Jiang 3 & Min Wang 1
Received: 6 May 2020 / Accepted: 2 November 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract This paper presents a quantitative pollutant discharge model for a typical molybdenum roasting plant, which combines the best available technology and object-oriented Petri net concepts. The proposed model was used to verify whether the best available technology in a molybdenum roasting process meeting the current pollutant emission limits by comparing the results of multiple simulations with online monitoring data records. Theoretical SO2 emission values were obtained via multiple simulations and compared with the online monitoring data of a typical molybdenum roasting plant to verify the authenticity of the online monitoring data. The relationship between the different operating parameters and desulfurization efficiency is established through analyzing the historical operation parameters of the enterprise and response surface method. It was found that the optimal operating parameters for the flue gas desulfurization system of this plant could be characterized by a flue gas temperature of 90– 93 °C, a pH range of 6.20–6.30, and a liquid-gas ratio of 23–25 L/m3. Keywords Best available technology . Object-oriented Petri nets . Molybdenum roasting . Response surface method . Desulfurization optimization
Introduction Molybdenum is a precious metal and has important applications in industrial production (Banks 2020; Gurram et al. 2018; Kar et al. 2005). During roasting of molybdenum concentrate, high SO2 emissions have prompted various attempts to reduce their levels in flue gas (Gu et al. 2020; Chen et al. 2018). Sodium alkali flue gas desulfurization technology is one of the best available technologies (the BATs, the most feasible and Responsible Editor: Marcus Schulz * Jiaqi Zhang [email protected] 1
Department of Environment Engineering, School of Resource and Civil Engineering, Northeastern University, Shenyang 110819, China
2
Shenyang Saisi Environmental Engineering Design & Research Center, No. 109-5, Quanyun Road, Shenyang 110819, Liaoning Province, China
3
Liaoning Ecological Environment Monitoring Center, Shenyang 110819, China
advanced technologies for achieving a high level of environmental protection) to treat flue gas from roasting of molybdenum concentrate (Chung et al. 2013; Uth 2014; Zhang et al. 2012). At present, most roasted molybdenum concentrate producers have adopted online systems for real-time monitoring of SO2 emission concentration. However, because business enterprises typically tend to ignore the environmental impact of pollutants due to their focus on maximizing profits, the authenticity of the monitoring data needs to be verified. Falsified data are typically generated through one of the followin
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