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首页> 外文期刊>International Journal of Greenhouse Gas Control >Effective retrofitting of post-combustion CO_2 capture to coal-fired power plants and insensitivity of CO_2 abatement costs to base plant efficiency
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Effective retrofitting of post-combustion CO_2 capture to coal-fired power plants and insensitivity of CO_2 abatement costs to base plant efficiency

机译：对燃煤电厂进行燃烧后二氧化碳捕获的有效改造，减少二氧化碳减排成本对基础电厂效率的敏感性

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摘要

Existing coal-fired power plants were not designed to be retrofitted with carbon dioxide post-combustion capture (PCC) and have tended to be disregarded as suitable candidates for carbon capture and storage on the grounds that such a retrofit would beuneconomical. Low plant efficiency and poor performance with capture compared to new-build projects are often cited as critical barriers to capture retrofit. Steam turbine retrofit solutions are presented that can achieve effective thermodynamic integration between a post-combustion CO_2 capture plant and associated CO_2 compressors and the steam cycle of an existing retrofitted unit for a wide range of initial steam turbine designs. The relative merits of these capture retrofit integration options with respect to flexibility of the capture system and solvent upgradability will be discussed. Provided that effective capture system integration can be achieved, it can be shown that the abatement costs (or cost per tonne of CO_2 to justify capture) for retrofitting existing units is independent of the initial plant efficiency. This then means that a greater number of existing power plants are potentially suitable for successful retrofits of post-combustion capture to reduce power sector emissions. Such awider choice of retrofit sites would also give greater scope to exploit favourable site-specific conditions for CCS, such as ready access to geological storage.
机译：现有的燃煤发电厂并未设计为使用燃烧后二氧化碳捕集（PCC）进行改造，并且由于这种改造不经济，因此往往被视为适合进行碳捕集和封存的候选人。与新建项目相比，工厂效率低下且捕获性能差通常被认为是捕获改造的关键障碍。提出了汽轮机改造解决方案，该解决方案可以在燃烧后的CO_2捕集装置和相关的CO_2压缩机与现有改造单元的蒸汽循环之间实现有效的热力学集成，从而适用于多种初始汽轮机设计。将讨论这些捕获改造集成选项相对于捕获系统的灵活性和溶剂可升级性的相对优点。如果可以实现有效的捕集系统集成，那么可以证明，改造现有装置的减排成本（或每吨CO_2用来证明捕集的成本）与初始工厂效率无关。因此，这意味着大量现有电厂可能适合成功改造燃烧后捕集以减少电力部门的排放。如此广泛的改造地点选择也将为利用CCS有利的地点特定条件提供更大的空间，例如可以随时使用地质存储。

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