钙基吸收剂捕集1 000 MW机组烟气中CO2的性能分析

doi:10.3969/j.issn.1000-7229.2015.05.019

摘要/Abstract

摘要：

针对某1 000 MW超临界机组，建立了基于钙基吸收剂循环煅烧/碳酸化法捕集CO₂的系统流程，研究了弛放率、气固分离效率、钙碳摩尔比对煅烧能耗、发电热效率及循环固体质量流量的影响。结果表明：引入碳捕集系统后，机组发电热效率为34.6%，较设计值降低了9.6%；将碳捕集系统回收热量用于发电，电厂净输出功率增加了113.4 MW；随着弛放率的提高，发电热效率、循环固体物料质量流量均下降，煅烧能耗先下降后升高；随着气固分离效率的提高，发电热效率、循环固体物料质量流量均升高，煅烧能耗先下降后升高；随着钙碳摩尔比的提高，煅烧能耗、发电热效率和循环固体物料质量流量均升高。

关键词: CO₂捕集, 煅烧, 性能分析, 烟气

Abstract:

A system process of Cyclic Calcinations/Carbonation based on the method of calcium-based sorbents was proposed for the CO₂ capture in a 1 000 MW supercritical power unit. The impact of purge rate, the gas-solid separation efficiency and the molar ratio of Ca and C on the energy consumption of calcination, the power generation thermal efficiency and the flow rate of circulating solids was studied. The results show that: after the introduction of carbon capture systems, the thermal efficiency of electricity generation for the unit is 34.6%, which is 9.6 % lower than the designed value； while after using heat recovery of carbon capture system to generate electricity, the net increase in the output power of the power plant reaches 113.4MW. With the increase of purge rate, the thermal power generation efficiency and the mass flow of solid circulating material decrease, and the energy consumption of calcination decreases first and then increases. With the increase of the efficiency of gas-solid separation, the thermal power generation efficiency and the mass flow of solid circulating material increase, and the energy consumption of calcination decreases first and then increases. With the increase of the mole ratio of Ca and C, the energy consumption of calcination, the thermal power generation efficiency and the mass flow of solid circulating material all increase.

Key words: CO₂ capture, calcination, performance analysis, flue gas

中图分类号:

TM 611
X 701

张学镭，崔巍. 钙基吸收剂捕集1 000 MW机组烟气中CO₂的性能分析[J]. 电力建设, 2015, 36(5): 119-124.

ZHANG Xuelei, CUI Wei. CO₂ Capture Performance from Flue Gas in 1 000 MW Unit with Using Ca-Based Sorbent[J]. ELECTRIC POWER CONSTRUCTION, 2015, 36(5): 119-124.

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钙基吸收剂捕集1 000 MW机组烟气中CO₂的性能分析

CO₂ Capture Performance from Flue Gas in 1 000 MW Unit with Using Ca-Based Sorbent

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