Flue gas treatment typically involves multiple scrubbing and absorbing stages, which increases capital and operating costs and requires large spaces; this process is particularly challenging for space-constrained ships. To address this issue, a highly practical, compact, efficient, intensified marine process for a diesel engine that simultaneously removes NO_x and SO_x to meet the current IMO MARPOL VI 14 regulations for SECAs and IMO MARPOL Annex VI Tier III for NECAs and captures CO₂ before compressing and liquefying it to comply with new IMO regulations. The proposed method uses NO ozonation and wet scrubbing with NaOH in a square marine scrubber, which reduces volume, weight, pressure drop, and associated costs. Mixed solvents, multiple feeds, rich solvent recycling, and heat integration were used to intensify CO₂ removal. Experimental results with a pilot scrubber on marine diesel engine flue gas agreed well with the results of Aspen Plus V12 simulations. Moreover, SO₂ absorption efficiency was > 97.0 %, NO₂ removal efficiency was > 92.2 %, and CO₂ removal efficiency increased from 87.4 % to 94.5 %. The stripper reboiler duty reduced to 38 kW (82.2 % savings) and the total operating costs (TOC) and total annual costs (TAC) reduced by 56.3 % and 13.9 %, respectively, compared with those of the base case.

中文翻译：

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从烟气中去除海洋 NOx、SOx 和 CO2：在试验工厂进行模拟和实验


烟气处理通常涉及多个洗涤和吸收阶段，这会增加资本和运营成本，并且需要较大的空间;这个过程对于空间受限的船舶来说尤其具有挑战性。为了解决这个问题，一种高度实用、紧凑、高效、强化的柴油发动机船用工艺，同时去除 NO_x 和 SO_x，以满足当前 IMO MARPOL VI 14 法规的 SECA 和 IMO MARPOL 附件 VI Tier III 的 NECA，并在压缩和液化之前捕获 CO₂，以符合新的 IMO 法规。所提出的方法在方形船用洗涤器中使用 NO 臭氧和 NaOH 湿法洗涤，从而减少了体积、重量、压降和相关成本。混合溶剂、多次进料、富溶剂回收和热集成用于强化 CO₂ 去除。在船用柴油发动机烟气上使用先导洗涤器的实验结果与 Aspen Plus V12 模拟的结果非常吻合。此外，SO₂ 吸收效率为 > 97.0 %，NO₂ 去除效率为 > 92.2 %，CO₂ 去除效率从 87.4 % 提高到 94.5 %。汽提塔再沸器的负荷降低到 38 kW（节省 82.2%），与基本情况相比，总运营成本 （TOC） 和年度总成本 （TAC） 分别降低了 56.3% 和 13.9%。