Organic Rankine circulatory system for recovering various residual heat through gas and electricity combined supply and using method

Abstract

The invention discloses an organic Rankine circulatory system for recovering various residual heat through gas and electricity combined supply. The organic Rankine circulatory system is characterizedby comprising an ash residue residual heat recovering high-pressure circulation loop, an air compressor exhaust residual heat recovering low pressure circulation loop, a motor, a speed increasing box,a first clutch and a second clutch, wherein the air compressor exhaust residual heat recovering low pressure circulation loop comprises an expander, a condenser, a condensation pump, a first air heatexchanger, a second air heat exchanger, a first air compressor, a second air compressor and an air collecting bag, wherein the motor is also connected to the expander through the first clutch; the other side of the motor is connected with the speed increasing box through the second clutch; and the speed increasing box is connected with the first air compressor and the second air compressor. A lowboiling organic working substance namely Rankine for comprehensively cycling residual heat of ash residues and high pressure air, the expander is used for dragging the air compressor and the motor, and the motor is mainly used as a standby application power source of the air compressor. Under the premise that the dragging of the air compressor is met, the motor can also be used for power supply outwards.

Description

technical field [0001] The invention belongs to the field of waste heat utilization, and in particular relates to a variety of waste heat recovery organic Rankine cycle systems for combined gas and electricity supply and a use method. Background technique [0002] Air compressors are high-pressure air source equipment that must be used in industries such as electric power, coking, and smelting. The high-pressure air generated is used for processes such as aerodynamics, gas transportation, gas synthesis, and refrigeration. According to relevant research, the pressure increase of the air in the air compressor only consumes 15% of the electrical energy of the motor, while the other 85% of the electrical energy is converted into heat energy to increase the temperature of the air, because high temperature air is not conducive to compression and process gas temperature Therefore, air compressors are equipped with heat exchangers to cool the air. The heat exchangers also have the f...

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Problems solved by technology

However, domestic water and heating cannot be fully utilized due to seasonal changes in winter and summer; the heat exchange utilization of condensed water is limited by the amount of condensed water, which is not enough to completely cool down the ash and slag, and affects the stability of the thermal cycle of the main engine; organic Rankine cycle The application mode of endothermic power generation is single and the utilization efficiency is low

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