Oblique flow re-pressurizing expansion refrigeration device and method

Abstract

The invention belongs to the technical field of gas expansion refrigeration and relates to an oblique flow re-pressurizing expansion refrigeration device and method. The oblique flow re-pressurizing expansion refrigeration device and method overcome the thermodynamics defect that traditional gas wave refrigerating machine pressure energy is changed into thermal energy, a double-opening pressure exchange gas wave machine serves as an expansion machine to form a refrigerating process with a compressor, one time of compression pressurizing is performed on refrigerating raw material gas in a double-opening oscillation pipe channel by means of the pressure exchange characteristic of a double-opening oscillation pipe, the high-pressure refrigerating gas pressure energy is directly recycled efficiently, and therefore the subsequent power consumption of the compressor is lowered, and the system refrigerating efficiency is improved. The oblique passageway design with the rotating radius changing is adopted for the double-opening oscillation pipe channel of the oblique flow re-pressurizing expansion refrigeration device and method, condensate drops in the oscillation pipe channel are thrown out of a cold end port by means of the rotation centrifugal force of a rotating drum, and the refrigerating efficiency is further improved. The oblique flow re-pressurizing expansion refrigeration device and method can be widely used for low temperature cold gas source supply, natural gas low temperature dehydration, petroleum gas light hydrocarbon recycling and other fields.

Description

technical field [0001] The invention belongs to the technical field of gas expansion refrigeration, and relates to an oblique flow repressurization expansion refrigeration device and method. Background technique [0002] Gas wave expansion refrigeration technology has the characteristics of simple structure and strong liquid-carried operation capability, and has great advantages in the fields of light hydrocarbon recovery and low-temperature treatment of natural gas. At present, gas wave refrigeration devices and technologies can be roughly divided into two types in terms of structure. One is a fixed single-opening oscillating tube structure. Through gas wave energy exchange, the expansion work of high-pressure gas is converted into heat energy of stagnant gas in the oscillating tube and then passed through Tube walls and chambers emanate, such as the patented air wave refrigerator 89213744.4, the common-cavity heat dissipation air wave refrigerator CN201010107516, the drain...

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Problems solved by technology

[0003] The first type of fixed single-opening oscillating tube gas wave refrigerator converts the expansion work into heat energy and dissipates it through the tube wall. The pressure energy is not recovered, and the energy utilization rate is not high.

The second type of external circulation dissipative gas wave refrigerator also converts expansion work into heat energy and dissipates it through an external heat exchanger

As for the axial-flow self-pressurized air wave refrigeration device, the effective recovery of energy depends on the efficiency of the external heat exchanger, which requires a relatively large heat exchange area, which leads to an increase in flow resistance, which not only consumes equipment materials, but also consumption of pressure energy

[0004] In addition, there is a problem of dirty gas condensate component liquid draining in the channels of the single-opening oscillating tube and the double-opening oscillating tube, which seriously affects the efficiency of gas wave refrigeration

At present, the problem of liquid drainage in the double-opening oscillating tube has not been solved

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