Organic Rankine Cycle Waste Heat Generating Set Working Fluid Filling and Recovery Device and Filling and Recovery Method

Abstract

The invention relates to a working medium filling and recovery device and a filling and recovery method of an organic Rankine cycle waste heat generating set. The working medium filling and recovery device includes a N2 bottle, a vacuum pump, a storage and transportation tank, an electronic platform scale and a public chassis; the storage The transport tank is fixed on the electronic platform scale; the electronic platform scale, the N2 bottle and the vacuum pump are installed on the common chassis; the N2 bottle is connected to the pressurized main gas valve through the pressure reducing valve; the pressurized main gas valve is connected to a ventilation pipe; the storage and transportation tank The storage tank is connected to the ventilation pipe through the emptying valve of the storage tank, the liquid storage tank is connected to the ventilation pipe through the liquid storage tank emptying valve, and the vacuum pump is connected to the ventilation pipe through the vacuum pump valve. The working medium filling and recovery method of the present invention is divided into a filling method and a recovery method. The advantages of the invention are: it can ensure that the working medium does not contact with water, the filling / recovery amount of the working medium can be grasped in real time, the flow of the working medium can be observed online, the structure is simple, easy to use, less investment, and high efficiency.

Description

technical field [0001] The invention relates to a working medium filling and recovery device and a filling and recovery method of an organic Rankine cycle waste heat generating set, belonging to the technical field of energy. Background technique [0002] With the rapid development of waste heat recovery technology, the high-temperature waste heat market is further saturated, and domestic and foreign research and development focus is gradually shifting to the medium and low temperature field. Organic Rankine cycle waste heat power generation is one of the most potential solutions. [0003] Organic Rankine cycle waste heat power generation unit usually consists of evaporator, turbine, condenser, liquid storage tank and working medium pump. Most of the working fluids that can be used now have low boiling point, strong permeability and high price. It has become an international problem to smoothly inject the working fluid into the unit and recover the working fluid during maint...

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Problems solved by technology

[0005] The disadvantage of the above method is: the booster pump will bring the moisture in the air into contact with the working fluid when it is pressurized, which will reduce the purity of the working fluid, thereby affecting the system efficiency; the continuous operation of the vacuum pump will cause the tank pressure to be low, causing the working fluid to Gasification, the working fluid gas will be pumped away, thereby increasing the loss of the working fluid; this method does not solve the root cause of how to judge whether the working fluid has been fully injected, or recovered

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