The composition and proportion of construction investment and operation cost(including direct and indirect running cost)

as well as the economic benefit

for a CO2 capture system were calculated

taking the 30 000 t/a capture system in coal fired boiler of Shengli Power Plant as the object.Results show that

the cost of trapping and purification section accounts for more than 3/4 of the construction investment

but storage section only for 1/10.For the operating cost

direct cost occupies more than 3/4 of the total

in which the electricity and steam spend the most;indirect cost is of small proportion

in which the cost-sharing of each project is uniform.As the cost of CO2 capture increasing

the profit rate of the system will decrease and turn to zero when the capture cost reaches 400 yuan/t and above.For the Shengli Power Plant

it is about 15%.