利用蒸汽和发电系统进行火炬气回收过程的能效分析

IF 2.2 4区 化学 Q2 Engineering
Elmira Touri Oqani, Hossein Sakhaeinia, Vahid Pirouzfar, Amir Heydarinasab
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引用次数: 0

摘要

保护环境被认为是当今工业单位的主要关切。火炬气燃烧系统作为一种处理解决方案或降低压力的安全措施并不合适。石油、天然气和石化行业也关注减少温室气体排放。火炬气与不可再生的化石能源有关,而由于对采集地下火炬气源的需求不断增加,火炬气的排放量也随之增加。这些气体的积累是由其他原因造成的,如未燃烧的工艺气体、过量气体、维修期间的装置废气、技术缺陷、进料变化、停机和开机等。有必要开展研究,收集有关防止燃烧气体的修订信息。从定量和定性两方面确定能源质量损失的位置,是优化工业装置的第一步。放能质量 "一词用于表示放能分析所产生的放能损失量。通过测量每个设备的能量损失,可以确定机组能量损失的临界点,这有助于提高效率。本研究的目的是利用放能分析来优化火炬气的回收,因为火炬气是一种不可再生能源。为了分析所有工艺设备的放能,选择了高压蒸汽发电、蒸汽轮机、热电联产和联合循环工艺。根据文献综述,联合循环的电力回收率最高。此外,还对上述四种工艺的放能分析进行了比较,并对其进行了必要的改进,同时给出了经济计算结果。结果表明,热交换器的最高放能损失分别为 25,776 (kj/kgmole)、26,538.5 (kj/kgmole)、25,776 (kj/kgmole) 和 625,828.5 (kj/kgmole)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Exergy analysis of flare gas recovery processes using steam and power generation systems

Exergy analysis of flare gas recovery processes using steam and power generation systems

The protection of the environment is considered to be a major concern of industrial units today. Flare gas combustion systems are inappropriate as a disposal solution or safety measure to decrease pressure. The oil, gas, and petrochemical industries are also concerned about reducing greenhouse gas emissions. Flare gases are associated with non-renewable fossil energies, which have also increased due to the ever-increasing need to harvest underground sources of flare gases. Accumulation of these gases is caused by other reasons such as unburned process gas, excess gas, exhaust gas from units during repairs, technical defects, change of feed, shutdown, and start-up, etc. Research is necessary to collect information regarding revisions to the prevention of burning gases. Identifying the location of energy quality losses, both quantitatively and qualitatively, is the first step in optimizing industrial units. The term “exergy quality” is used to express the amount of exergy loss resulting from exergy analysis. It is possible to determine the critical point of energy loss in a unit by measuring the energy loss in each device, which contributes to increased efficiency. The purpose of this study is to use exergy analysis in order to optimize the recovery of flare gas, which is a form of non-renewable energy. To analyze the exergy of all process equipment, high-pressure steam generation, steam turbine, heat and power generation, and combined cycle processes are selected. According to the literature review, the combined cycle provides the highest rate of electricity recovery. In addition, the exergy analyses of the four processes above are compared, and necessary modifications are made to improve them and the results of economic calculation are presented. The results represented that the highest exergy loss of heat exchangers is equal to 25,776 (kj/kgmole), 26,538.5 (kj/kgmole), 25,776 (kj/kgmole), and 625,828.5 (kj/kgmole) in the processes, respectively.

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来源期刊
Chemical Papers
Chemical Papers Chemical Engineering-General Chemical Engineering
CiteScore
3.30
自引率
4.50%
发文量
590
期刊介绍: Chemical Papers is a peer-reviewed, international journal devoted to basic and applied chemical research. It has a broad scope covering the chemical sciences, but favors interdisciplinary research and studies that bring chemistry together with other disciplines.
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