Recovery of industrial heat in the cement industry by means of the ORC process

Abstract

The 1,500 kW organic Rankine cycle heat recovery system at the Heidelberger Zement AG Plant in Lengfurt is the first of such systems supplied to the cement industry. This nonpolluting power plant recovers the unused heat available from the grate cooler and generates electricity on a continuous basis without interfering with the core, clinker production process. Operation of the power plant results in an annual CO/sub 2/ emissions reduction of 7,600t equivalent to 29.1% related to the CO/sub 2/ amount correlated to the electrical energy used in the plant and 2.63%, related to the total produced CO/sub 2/.