Organic Rankine two-stage flash evaporation circulating system with gas-liquid ejector

Abstract

The invention provides an organic Rankine two-stage flash evaporation circulation system with a gas-liquid ejector. The organic Rankine two-stage flash evaporation circulation system comprises an evaporator, a gas-liquid separator, a flash evaporation tank, a high-pressure expansion machine, a low-pressure expansion machine, a condenser, the gas-liquid ejector, a working medium pump, a first mixer, a second mixer, a first power generator and a second power generator. According to the invention, full recovery and utilization of medium-low-grade heat energy are realized; the aim of pressurizing the working medium is fulfilled without consuming mechanical work, and a working medium pump at an outlet of a condenser is replaced, so that the work consumption of the working medium pump is effectively reduced; the expansion work sacrifice due to injection is reduced to the maximum extent, and therefore the net output work of the system is increased.

Description

technical field [0001] The invention relates to the technical field of organic Rankine flash cycle power generation, in particular to an organic Rankine two-stage flash cycle system with a gas-liquid ejector. Background technique [0002] In recent years, my country's unreasonable energy structure and increasing energy consumption have made environmental problems intensified. Vigorously developing clean energy and utilizing industrial waste heat have become an inevitable choice for my country's development. The distribution of the above-mentioned energy sources in my country is characterized by a large amount, a variety of types, and a wide distribution, but most of them are medium and low temperature heat sources. Therefore, the development of medium and low temperature resource utilization technology has become a top priority. [0003] In order to efficiently utilize medium and low temperature heat sources, low-grade primary energy or industrial waste heat and waste heat a...

AI Technical Summary

Problems solved by technology

However, as the scale of organic Rankine cycle power generation is reduced to adapt to the local medium and low temperature resources, the size of each component of the system is reduced, the efficiency of a single unit is reduced, and the problem of large power consumption of the working fluid pump becomes more and more obvious, which can account for more than half of the expansion at most. Therefore, how to effectively reduce the power consumption of the working fluid pump has become a key issue in improving the performance of the organic Rankine cycle system.

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