Gas multi-stage liquefying plant driven by acoustic resonance type thermo-acoustic engine

Abstract

The invention provides a gas multi-stage liquefying plant driven by an acoustic resonance type thermo-acoustic engine. The gas multi-stage liquefying plant is compedos of N stages of thermo-acoustic engine units of a loop structure and N stages of bypasses, wherein the loop structure is formed by connecting resonant tubes end to end; the N stages of bypasses are arranged in engine secondary water cooler outlets; the Nth-stage bypass is connected with a pulse tube refrigerator unit, and the rest bypasses are connected with at least three pulse tube refrigerator units; in the working process, engine heaters are heated, a system generates reciprocating oscillation pressure fluctuation and generates thermo-acoustic conversion in refrigerator heat regenerators, cold end heat is sent to refrigerator main coolers, and cold ends are kept at low temperatures; along with increase of the number of the stages of the bypasses, the temperatures of the cold ends are gradually reduced to the gas liquefaction temperature; gas sequentially flows through the cold ends of the first-stage bypass to the (N-1)th-stage bypass according to the cold end temperatures from high to low, sensible heat is released, and the temperatures are reduced to the liquefaction temperature; and the gas finally passes the cold end of the Nth-stage bypass to be transformed in a liquid state from a gas state. The temperature of the gas can be reduced in a gradient manner and heat transfer losses are reduced; and no mechanical moving part exists, the structure is compact, and the whole process of gas liquefaction can be achieved.

Description

technical field [0001] The invention belongs to the field of gas liquefaction, and in particular relates to a gas multistage liquefaction device driven by an acoustic resonance type thermoacoustic engine. Background technique [0002] Liquefaction is the process of changing a substance from a gaseous state to a liquid state. Since the volume of gas after liquefaction usually becomes one thousandth of its original volume, which is convenient for storage and transportation, some gases are usually liquefied in reality. There are two ways to achieve liquefaction, one is to lower the temperature, and the other is to compress the volume. Any gas can be liquefied when the temperature drops low enough. [0003] A thermoacoustic engine is a device that uses pipes and heat exchangers to obtain a suitable sound field inside it, and converts external heat energy into sound energy through the interaction between the working medium and the solid packing of the regenerator, with no mecha...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a gas multi-stage liquefaction device driven by an acoustic resonance type thermoacoustic engine in order to overcome the overall process problem that the above system cannot realize gas liquefaction. The system has a simple and compact structure, no moving parts, and is safe and reliable. The thermoacoustic engine unit works in the traveling wave phase, has high energy density, can lower the gas temperature step by step, and has small heat transfer loss; it has broad development and application prospects in gas liquefaction

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