STEAM RANKINE-LOW BOILING POINT WORKING FLUID RANKINE JOINT CYCLE POWER GENERATION APPARATUS

摘要

A steam Rankine-low boiling point working fluid Rankine joint cycle power generation apparatus comprising systems of a steam Rankine cycle and of a low boiling point working fluid Rankine cycle. In the steam Rankine cycle, the pressure of an exhaust steam (5) discharged by a turbine (4) is greater than the atmospheric pressure. In the low boiling point working fluid Rankine cycle, a liquid-state working fluid (11) is passed through a circulation pump (12), a condensation evaporator (10) or an evaporator (14), and a cooling evaporator (13) to produce a low boiling point working fluid steam that is passed through a superheater (9) to form a low boiling point working medium superheated steam (16) that is then introduced into the turbine (17) to drive a power generator (20) to generate electricity, while a depleted steam discharged by the turbine (17) is cooled by a condenser (18) to form a liquid-state working fluid (11) that is then introduced into the circulation pump (12), thus forming a low boiling point working fluid Rankine cycle loop. The boiling point of the low boiling point working fluid at standard atmospheric pressure is less than -10°C. The steam Rankine-low boiling point working fluid Rankine joint cycle power generation apparatus solves the safety challenge of residual heat of a recycled flue gas in a low boiling point working fluid Rankine cycle, effectively reduces exhaust gas temperature and prevents flue gas low-temperature corrosion, and allows for effective recycling of waste gas, wastewater, and waste steam residual heat of the steam Rankine cycle system.