Abstract
In this paper the results of the thermodynamic analysis of the
oxy-combustion type pulverized bed boiler integrated with a hybrid,
membrane- cryogenic oxygen separation installation are presented. For the
calculations a 600 MW boiler with live steam parameters at 31.1 MPa /654.9
oC and reheated steam at 6.15 MPa/672.4 oC was chosen. In this paper the
hybrid membrane-cryogenic technology as oxygen production unit for
pulverized bed boiler was proposed. Such an installation consists of a
membrane module and two cryogenic distillation columns. Models of these
installations were built in the Aspen software. The energy intensity of
the oxygen production process in the hybrid system was compared with the
cryogenic technology. The analysis of the influence of membrane surface
area on the energy intensity of the process of air separation as well as
the influence of oxygen concentration at the inlet to the cryogenic
installation on the energy intensity of a hybrid unit was performed.
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