A regenerative mixed refrigerant gas liquefaction cycle system

Abstract

A recuperative mixed working fluid refrigeration gas liquefaction cycle system, including a compressor module, a regenerative heat exchanger module and a throttling module. The compressor module includes a compressor; the regenerative heat exchanger module includes a vertically placed The decondensing separator, the first recuperation heat exchanger, the intermediate throttling element and the second recuperation heat exchanger; the throttling module includes a refrigeration system throttling adjustment valve group and a raw material throttling adjustment valve group. The above-mentioned recuperative mixed working fluid refrigeration gas liquefaction cycle system, due to more complete heat recovery, complete oil return system and condensation separation technology, the refrigeration process can be driven by a single ordinary oil lubricated compressor drive system, which is cheap and reliable; cycle process The layout is flexible and can be efficiently and widely adapted to the needs of applications with complex distributed loads such as multi-element gas liquefaction separation. It is not sensitive to raw gas working conditions and can liquefy natural gas, coal bed methane and other gases at lower pressures.

Description

technical field [0001] The invention relates to a refrigerator in the technical field of refrigeration and low temperature, in particular to a regenerative mixed refrigerant gas liquefaction circulation system. Background technique [0002] The research on natural gas liquefaction devices is a hot spot in the world. The existing coalbed methane / natural gas liquefaction technologies mainly include the following types, and their technical characteristics and development are briefly introduced as follows: [0003] 1) Cascade cascade liquefaction process: This liquefaction process usually adopts three-stage pure working medium cascade refrigeration (cascade cascade), which are three refrigeration units of propane, ethylene and methane, and cascade cooling step by step to realize natural gas cooling and liquefaction. Among them, three different evaporation pressure levels are adopted in each level of pure working fluid cycle, so that up to nine evaporation temperature platforms ...

AI Technical Summary

Problems solved by technology

However, the traditional MRC liquefaction process technology also has an insurmountable technical problem: the restart process after each shutdown is quite complicated, which not only requires the operation of very professional personnel and the cooperation of a large number of special instruments and equipment, but also is very time-consuming

However, there is currently no special multi-stage compressor available for small liquefaction plants.

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