A novel design concept for pressurized oxygen-enriched waste incineration power plant with nearzero emission was proposed

in which the slag-tap pressurized waste incineration boiler was applied

and the oxygen production and flue gas compression purification and recovery system were added.Taking a waste incineration turbine-generator unit which consumes municipal waste of 1 100 teach day as the research object

the technical and economic analysis was carried out for the unit at pressure of 0.5MPa

1.0MPa and1.5 MPa

and the results were compared with that of the atmospheric pressure oxy-fuel combustion.It shows that

under pressurized oxygen-enriched combustion condition

since the systematic pressure increased

the latent heat of steam in flue gas can be recovered to heat the low pressure condensate in steam turbine

thus to reduce the steam extraction and increase the turbine power output.As a results

the gross unit power output reached 25 MW.The power consumption of air separation unit(ASU)rose

which accounted for about 35% of the power generation

and that of the compression and purification unit(CPU)reduced

which accounted for about 5% of the power generation

both were lower than that of the atmospheric pressure oxygen-enriched combustion.Considering other auxiliary power consumptions

the overall net unit efficiency at pressure from 0.5MPa to 1.5MPa of the oxygen-enriched combustion was enhanced by about 9.31%to 9.9%.