Economical Feasibility Analysis For The Application Of Oxy-fuel Combustion Technology

On the background of the universal demand of energy saving and emission reduction, the oxy-fuel combustion technology, as a new burning technology, has received various research institutions'extensive attention. To the existing merit and shortcoming of oxy-fuel combustion technology, this article has carried on the comprehensive economic feasibility analysis, providing theory basis for its future application.In this paper, the related principle of engineering thermodynamics and the heat transfer theory is applied to estimated the operation and the energy consumption of the equipments in the the form of quantitative, including the boiler, air separation unit, CO₂ capture system and flue gas desulphurization systems. And it has estimated the boiler's initial cost applying thermodynamics cost estimate method. Finally, this paper carry on a comprehensive economic analysis for the unit. In the analysis, it refers to the cost of the annual amortization in technical economics, and consideres the coal costs, operation and maintenance costs and the net electricity. It is very intuitive description of the advantages and disadvantages of oxy-fuel combustion technology. In addition, The boiler improvement, the various equipment's related structure and operation process has also been introduced in detail ,in order to improve the content of the assessment.Through comprehensive analysis of all kinds of the equipments, we can conclude that the efficiency of the boiler and flue gas desulfurization appliance is slightly higher than conventional unit, but the huge energy consumption of air separation unit and CO₂ capture system reduced the overall efferency of unit, and the Infrastructure investment increase sharply meanwhile. When all these factors are integrated to the cost of electricity supply, you can find that the oxy-fuel combustion unit's cost of electricity supply is higher than conventional unit's, but it reduces a large amount of CO₂ emissions and the environmental gains is inestimable. Generally speaking, oxy-fuel combustion technology is feasible, it is more economic than the other CO₂ emission reduction technology. Compared with other technology, it has more advantages.