Low-temperature waste heat power generation system based on thermal permeation principle and concentration difference energy utilization

Abstract

The invention relates to a low-temperature waste heat power generation system based on the heat permeation principle and concentration difference energy utilization, and belongs to the technical field of energy and waste heat and residual pressure recycling. The system consists of two mutually coupled cycles, namely a permeation side cold water cycle and a concentration difference energy power cycle; the permeation side cold water circulation comprises a hydrophobic membrane assembly, a hydraulic turbine, a cooling tower, a cooler, a cold water pressure pump and a cooling water pump; the concentration difference energy power cycle comprises a gas-liquid separator, an ejector, an absorption evaporator, a steam turbine, a water supply preheater I, a dilute solution pump, a water supply preheater II, a three-way regulating valve, a waste heat heater, a hydrophobic membrane assembly and a water supply pump. The heat permeation effect of the solution and the heat release effect of the concentrated solution in the absorption and dilution process are fully utilized, available energy of low-temperature waste heat is efficiently recycled, high-grade mechanical energy or electric energy is produced, and therefore efficient recycling of the low-temperature waste heat is achieved, and the efficiency of a waste heat power generation system is improved to the maximum extent.

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