AEB, the Waste and Energy Company of the city of Amsterdam, operates the MSWI AVI Amsterdam. As an extension of the existing plant, two new high-performance lines for waste incineration (HR AVI) were built up, which went into operation in the summer of 2007. The technical concept primarily consists of a) (partly) water cooled fire grate, b) boilers with natural circulation, horizontal boiler with three blank passes (“Leerzüge”), increased steam parameters, c) flue gas cleaning with SNCR, electrostatic filter, entrained-bed process and wet scrubbers, d) flue gas recirculation, e) steam turbine with separate high-pressure and low-pressure section, reheater with saturated steam, and f) water cooling condenser (harbor water). By an optimized, innovative process technology, the electrical net efficiency could be increased in a single step from 22 to about 30 %, which turns out to be the current leading-edge technology. This result essentially depends on the reheating with saturated steam in an external heat exchanger, that allows a significant increase in efficiency at reasonable steam temperatures. |