A dual-mass cycle waste heat power generation system

Abstract

The invention discloses a double-working-medium circulation waste heat power generating system which comprises a steam turbine and a low-boiling-point working medium turbine. The steam turbine drives a power generator. The low-boiling-point working medium turbine is coaxially connected with the steam turbine. The steam turbine is driven by the steam generated by a waste heat boiler. When the steam generated by the waste heat boiler is conveyed to the steam turbine, the steam acts in an expansion manner, the discharged steam sequentially passes a working medium evaporator and a working medium heater for heat exchange through pipelines, the steam emits heat and is condensed into liquid, and the liquid returns to the waste heat boiler through a water pump and is heated into steam. The low-boiling-point working medium turbine is driven by working medium gas, the working medium liquid sequentially passes the working medium heater and the working medium evaporator, absorbs heat and evaporates to form working medium gas, the working medium gas enters the low-boiling-point working medium turbine and acts in an expansion manner, and the discharged working medium gas after action emits heat through a heat returning device. By the reasonable design of double-working-medium circulation and multiple heat exchanging treatments, the steam discharge waste heat generated during steal circulation can be fully used as the heat source of a low-boiling-point working medium circulation, and waste heat utilization rate can be increased greatly.

Description

technical field [0001] The invention belongs to the technical field of waste heat benefiting, and relates to a waste heat power generation system with duplex circulation. Background technique [0002] In the industrial process, in order to effectively use the waste heat of flue gas or other gas sources to save energy, the conventional waste heat utilization is to heat water through a single waste heat boiler to generate steam, and the steam enters the steam turbine to expand and do work to drive the impeller to rotate, thereby driving the generator to generate electricity . In a conventional steam cycle, only about 30% of the heat energy is converted into electricity, and 70% of the heat is taken away by the circulating cooling water of the condenser during steam condensation, and the efficiency of waste heat utilization is not high. Contents of the invention [0003] The problem to be solved by the present invention is to provide a dual working substance circulation wast...

AI Technical Summary

Problems solved by technology

In the conventional steam cycle, only about 30% of the heat energy is converted into electrical energy, and 70% of the heat is taken away by the circulating cooling water of the condenser during steam condensation, and the efficiency of waste heat utilization is not high

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