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

doi:10.3969/j.issn.1000-7229.2015.05.019

Abstract

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

CLC Number:

TM 611
X 701

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

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