Two-stage ejection-absorption type heat converter

Abstract

The invention discloses a two-stage ejection-absorption type heat converter which consists of an absorber, a first solution heat exchanger, a generator, a solution pump, a second solution heat exchanger, a high-temperature generator, a condenser, a first throttling valve, an evaporator, a first-stage ejector, a second-stage ejector and a second throttling valve. Driving steam entering the first-stage ejector ejects low-pressure refrigerant steam entering the first-stage ejector from the generator to form steam with intermediate pressure and temperature; the steam with the intermediate pressure and temperature is further ejected into steam with higher pressure and temperature by driving stream entering the second-stage ejector; the steam with the higher pressure and temperature enters the high-temperature generator and then is used as a driving thermal medium of the high-temperature generator. Due to the adoption of a simple structure, a condensation link which is necessary in the traditional heat converter and deeply constrains the heat converter is omitted and the value of high-quality driving steam is fully exerted. Due to the utilization of a two-stage ejection process, the working efficiency of the ejector is optimized; meanwhile, the requirement on the grade of the driving steam can also be reduced or the requirement on the temperature of a waste heat medium is reduced.

Description

technical field [0001] The invention belongs to the technical field of low-temperature waste heat utilization and energy saving. Background technique [0002] Absorption heat pumps use thermal energy as power, and use the reverse Carnot cycle to transfer heat from low temperature to high temperature. It is especially suitable for occasions with a large amount of waste heat. The condensed state of waste heat can be gaseous or liquid. At present, common absorption heat pumps are divided into the first type of absorption heat pump and the second type of absorption heat pump. The latter, also known as heat exchanger, is an energy-saving device that transfers heat from low temperature to high temperature without driving a heat medium. It is especially suitable for occasions with a large amount of high-temperature waste heat, but at the same time, according to the second law of thermodynamics, when a part of the heat grade increases, a part of the heat must decrease in grade, so t...

AI Technical Summary

Problems solved by technology

However, since this type of heat pump can only recover steam, it cannot directly recover low-temperature liquid waste heat, such as the heat contained in low-temperature hot water, which greatly limits its application fields.

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