Fulin Kong, Yuxin Liu, Tong Lige, Wang Li, Yinan Qiu
School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Beijing Key Laboratory of Energy Saving and Emission Reduction for Metallurgical Industry, University of Science and Technology Beijing, Beijing 100083, China.
ACS Omega. 2021 Oct 27;6(44):29921-29931. doi: 10.1021/acsomega.1c04404. eCollection 2021 Nov 9.
Aiming at the problem of gas emissions caused by the high-pressure operation of a large industrial gas (O, N, and Ar) pipeline network, this study establishes a mathematical model of the oxygen transmission and distribution system (OTDS) based on TGNET software. In addition, the study conducts transient simulation, comprehensively considering theoretical constraints and actual operation requirements, and adopts a large air separation company for the OTDS as a case study. After comparing two traditional adjustment methods, a compressor short stop adjustment strategy is proposed to reduce the peak pressure of the pipe network system. This study determines the energy-saving benefits and the difference in the scope of application of compressor short-stop adjustment. Compared with the medium-pressure release and inlet guide vane opening adjustment (IGVOA) strategies, the compressor short-stop adjustment strategy reduced oxygen emission by 3850.9 Nm and increased by 927.1 Nm. Furthermore, the compressor operating energy consumption was reduced by 3349 and 2919 kW h. Compared with the IGVOA strategy, the compressor short-stop adjustment strategy has increased the application range of compressor inlet pressure and medium-pressure pipeline pressure by more than 70%. This strategy is effective for reducing the emission of pipeline gases caused by fluctuations in user demand.
针对大型工业气体（氧气、氮气和氩气）管网高压运行导致的气体排放问题，本研究基于TGNET软件建立了氧气传输与分配系统（OTDS）的数学模型。此外，该研究进行了瞬态模拟，综合考虑理论约束和实际运行要求，并以一家大型空分公司的OTDS为例进行研究。在比较两种传统调节方法后，提出了一种压缩机停机调节策略，以降低管网系统的峰值压力。本研究确定了压缩机停机调节的节能效益及其应用范围的差异。与中压释放和进口导叶开度调节（IGVOA）策略相比，压缩机停机调节策略减少氧气排放3850.9 Nm，增加927.1 Nm。此外，压缩机运行能耗分别降低了3349和2919 kW h。与IGVOA策略相比，压缩机停机调节策略使压缩机进口压力和中压管道压力的应用范围增加了70%以上。该策略对于减少因用户需求波动导致的管道气体排放是有效的。
