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Energy and exergy analysis of MSW-based IGCC power/ polygeneration systems

机译：基于MSW的IGCC电源/多种式系统的能量和漏洞分析

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摘要

Since municipal solid waste (MSW) is a negatively priced, abundant, and essentially renewable feedstock, energy recovered from MSW is a useful technology to reduce the consumption of fossil fuels, and also reduces the expenses needed to dispose of MSW. Three configurations of MSW-based IGCC power system (Design 1), MSWbased IGCC polygeneration system (Design 2), and CaO-based IGCC polygeneration system (Design 3) are proposed. Design 1 uses a combination of an identified MSW gasifier, an integrated intermittent chemical-loop air separation (IICLAS), and Rankine and Brayton cycles to generate electricity and achieve the high concentration of CO2 emissions around 93.3%-94.7%. The process for co-production of DME and MeOH in Design 2, which replaces the Rankine cycle in Design 1, could increase the net energy efficiency of Design 1 by 71.6%, but the total CO2 emissions from Design 2 are merely 7.97% of Design 1. The calcium looping gasification (CaLG) process in Design 3, which replaces the MSW gasifier in Design 2, could increase the production rate of DME of Design 2 by 12.5%. The CO2 concentration from the calcinator in Design 3 is higher than CO2 concentration in flue gas from Designs 1 and 2 by 2.0%-3.5%. Through exergy analysis, the overall exergy efficiency of Design 3 is lower than Designs 1 and 2 by 3.2%-10.1% due to the exergy destruction rate and ratio in the gasification zone of Design 3 higher than other designs. The GaLG process could increase the DME yield as well as the outlet CO2 concentration, but this approach design induces a higher exergy loss.
机译：自市级固体废物（MSW）是一种负面的价格，丰富，且基本上可再生的原料，从MSW中恢复的能量是减少化石燃料消耗的有用技术，并且还减少了处置MSW所需的费用。提出了三种基于MSW的IGCC电力系统（设计1），MSWBASED IGCC多项式系统（设计2）和CAO的IGCC多元系统（设计3）的配置。设计1使用鉴定的MSW气化器的组合，集成间歇性化学环空气分离（IICLAS），以及兰氏峰和布雷顿循环，以产生电力并达到约93.3％-94.7％的高浓度的二氧化碳排放量-94.7％。 DME和MeOH在设计2中的共同生产的过程，它取代了设计1中的兰氏藻循环，可以提高设计的净能量效率为71.6％，但设计2的总二氧化碳排放仅仅是设计的7.97％ 1.设计3中的钙循环气化（CALG）过程，它取代了设计2中的MSW气化器，可以将DME设计2的生产速度提高12.5％。从设计3中的煅烧剂的CO 2浓度高于来自设计1和2的烟道气中的CO 2浓度2.0％-3.5％。通过Deerveny分析，由于设计3高于其他设计，设计3的整体漏洞效率低于设计1和2％-10.1％。 GALG工艺可以增加DME产量以及出口CO2浓度，但这种方法设计诱导更高的漏洞。

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