2411-3336 2541-9404 Записки Горного института Journal of Mining Institute Санкт-Петербургский горный университет императрицы Екатерины ΙΙ Empress Catherine II Saint Petersburg Mining University LXDVDP pmi-16179 https://pmi.spmi.ru/pmi/article/view/16179 Энергетика Energy industry Enhancement of energy efficiency of the vacuum oil distillation unit using pinch analysis Повышение энергоэффективности вакуумной установки перегонки мазута с помощью пинч-анализа Yushkova Еkaterina А. Юшкова Е. А. Yushkova Еkaterina А. atenoks@mail.ru 0000-0002-8492-0159 Санкт-Петербургский Горный Университет (Санкт-Петербруг, Россия) Saint Petersburg Mining University (Saint Petersburg, Russia) Lebedev Vladimir A. Лебедев В. А. Lebedev Vladimir A. lebedev_va@spmi.ru 0000-0003-0956-5772 Санкт-Петербургский Горный Университет (Санкт-Петербруг, Россия) Saint Petersburg Mining University, Saint Petersburg (Saint Petersburg, Russia) 19 07 2023 2023 261 415 427 10 03 2023 20 06 2023 19 07 2023 © 2023 Е. А. Юшкова, В. А. Лебедев © 2023 Еkaterina А. Yushkova, Vladimir A. Lebedev 2023 Е. А. Юшкова, В. А. Лебедев Еkaterina А. Yushkova, Vladimir A. Lebedev Эта статья доступна по лицензии Creative Commons Attribution 4.0 International (CC BY 4.0) This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0) https://pmi.spmi.ru/pmi/article/view/16179

Повышение энергоэффективности нефтеперерабатывающего предприятия – актуальная задача государства. Объектом исследования является вакуумная установка перегонки мазута, включающая блок предварительного нагрева сырья и печь подогрева мазута перед колонной. Пинч-анализ позволяет проанализировать и оптимизировать большое количество тепловых потоков. Анализ и повышение энергоэффективности объекта исследования проводится энтальпийным пинч-анализом. С целью снижения тепловой нагрузки печей введены дополнительные потоки в систему теплообмена блока подогрева нефти. Проведена параметрическая оптимизация новой системы теплообмена, определены минимальные потребности системы теплообмена во внешних энергоносителях. Построен энтальпийный каскад системы теплообмена, который наглядно показывает распределение тепла между каждым тепловым потоком системы. Поиск оптимальной потоковой теплоемкости продуктов сгорания печи – важный пункт в анализе энергоэффективности печи. Выявлена оптимальная потоковая теплоемкость, при которой потери тепла с уходящими газами минимальны. В результате проведенных исследований повышена эффективность блока предварительного нагрева мазута за счет доведения рекуперации тепла до максимума, а затраты на внешние энергоносители минимизированы. Уменьшением потерь тепла с уходящими газами удалось увеличить КПД печи.

The actual task of the state is to increase the energy efficiency of the oil refinery. The object of research is a vacuum distillation unit, including a preheating unit for raw materials and a furnace for heating fuel oil before the column. Pinch analysis allows to analyze and optimize a large number of heat flows. In this study the analysis and enhancement of efficiency of the research object is carried out by enthalpy pinch analysis. In order to reduce the heat load of the furnaces, the additional flows were introduced into the heat exchange system of the oil heating unit. Parametric optimization of the new heat exchange system was carried out. The minimum needs of the heat exchange system in external energy carriers are determined. An enthalpy cascade of the heat exchange system has been constructed, which clearly shows the distribution of heat between each heat flow of the system. In the analysis of the energy efficiency of a furnace, an important point is the determination of the optimal heat capacity of the combustion products. In this work, we have determined the optimal flow heat capacity, at which the heat loss with the exhaust gases is minimal. As a result of the studies carried out, the efficiency of the fuel oil preheating unit has been increased by maximizing heat recovery, and the cost of external energy carriers has been minimized. By reducing heat loss with flue gases, it was possible to increase the efficiency of the furnace.

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