Novel heat-regeneration type low-temperature circulating refrigeration system

Abstract

The invention discloses a novel heat-regeneration type low-temperature circulating refrigeration system and device. Refrigerants which come from a refrigerant storage tank and keep a gaseous state in the circulation process are compressed by a compressor, then the compressed refrigerants are obtained, flow through a three-fluid heat exchanger, enter a turbo expander to be expanded after the temperature is reduced, flow through the three-fluid heat exchanger after the temperature is reduced further and ultimately return the refrigerant storage tank. After the refrigerants reach a certain temperature, the cooling capacity of the refrigerants can be used for industrial application. Fewer devices are used in the whole technological process, automatic control can be realized, the refrigerants circulate for refrigeration, investment of funds is reduced, and the novel heat-regeneration type low-temperature circulating refrigeration system and device have a good industrial popularization and market application prospect in the low-temperature refrigeration field.

Description

technical field [0001] The patent of the present invention relates to the technical field of low temperature refrigeration, and is an industrial device for liquefying, recovering certain media or reducing the temperature of the media. Background technique [0002] The global energy crisis since the 1970s and the freon replacement movement in the 1980s have greatly promoted the development of mixed working fluids. In general, the application of mixed working fluid in throttling refrigeration cycle is mainly based on two aspects: First, as a new type of refrigeration working fluid, it can replace the CFC working fluid in the traditional Freon family, and play a role in protecting the environment and saving energy; On the other hand, through a specific ratio, in the case of single-stage compression, a deep and low temperature environment is generated. Research in the field of low temperature is closely related to the national economy and people's life, especially the cryoprese...

AI Technical Summary

Problems solved by technology

The low temperature cycle also uses an expansion vessel and a very efficient oil separator, resulting in a very complex system

Because the separation of lubricating oil is very difficult, at low temperature, even a small amount of lubricating oil solidifies can cause the pipeline of the system to be blocked, so the operation stability of this type of device is very poor and the service life is short

The primary throttling refrigeration technology of multiple mixed refrigerants developed in recent years has avoided the problem of using multiple compressors, but the problems of lubricating oil and system stability have not been solved

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