Circulating working medium heat exchanger with oil separation function and application thereof

Abstract

The invention discloses a circulating working medium heat exchanger with an oil separation function and application thereof. The circulating working medium heat exchanger with the oil separation function comprises an oil separation heat exchange device (b) and a heat exchange oil storage device (c) placed below the oil separation heat exchange device (b), and the oil separation heat exchange device and the heat exchange oil storage device communicate with each other; a screen filter element assembly (15) is arranged inside the oil separation heat exchange device (b) to integrate the oil separation and the heat exchanger functions together, and materials of equipment and the occupied space are saved; and liquid phase working medium is used for recycling waste heat from gas phase working medium, lubricating oil is separated from the gas phase working medium at the same time, the separated lubricating oil is stored in a cylinder body of the heat exchange oil storage device, and a heat exchange tube in the cylinder body is used for heating and cooling the lubricating oil. The heat exchanger is applied to an organic Rankine circulatory system (d) to reduce the temperature of the gas phase working medium at an outlet of a volumetric-type expansion machine (19), and the oil separation effect is improved while the thermal efficiency of the system is improved.

Description

technical field [0001] The invention relates to a circulating working fluid heat exchanger with oil separation function and its application, belonging to the technical field of energy. Background technique [0002] One of the ways to solve the problem of energy shortage in today's society is to make full use of various waste heat resources and develop and utilize renewable energy such as geothermal energy and solar energy. The organic Rankine cycle system is simple, and has a high recycling rate for heat sources such as geothermal heat, solar energy, factory waste heat, and generator waste heat. A general organic Rankine cycle expander system (ORC) is composed of important equipment such as expander, oil separator, condenser, liquid receiver, working fluid pump, regenerator and evaporator. [0003] In the organic Rankine cycle system, the exhaust gas regenerator extracts the working medium in the expander to heat the condensed working medium, and increases the temperature o...

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Problems solved by technology

[0005] In the traditional organic Rankine cycle system with oil separator and regenerator, the oil separator and regenerator are two separate devices, the system is relatively complicated, and the heat recovered by the regenerator starts after the oil separator , the heat recovery efficiency is low, and the equipment occupies a large space

[0006] The structure of the traditional oil separator is relatively simple, and the function is relatively single. In the case of continuous operation of the expander, the temperature of the lubricating oil is very high, so that the viscosity reduction performance is reduced; To achieve a good lubricating effect, the traditional oil separator cannot monitor the concentration and temperature of the lubricating oil, and it can heat and cool the lubricating oil in time

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