Ultrasonic gas cyclone condensing and separating device

Abstract

The invention relates to an ultrasonic gas cyclone condensing and separating device applied to the field of gas purification, in particular to the field of natural gas dewatering and heavy hydrocarbon separation. Natural gas generates a cyclone by spiral cyclone blades, enters an Laval nozzle to adiabatically expand to an ultrasonic velocity and form low temperature and low pressure so that water and heavy hydrocarbon in the natural gas are condensed into liquid drops; meanwhile, a higher tangential velocity is generated to fling the water and the heavy hydrocarbon which are condensed to the wall surface under the action of a strong cyclone field; liquid flows into a liquid-collecting cavity from a liquid shunt hole and is discharged from a liquid outlet by a liquid-discharging pipe; and dry gas enters a circular diffuser pipe, is recovered by pressure and is discharged from a dry gas outlet. The shrinking section of the Laval nozzle of the device is designed by using a bicubic curve method to reduce flowing loss; the spiral cyclone blades can enhance the cyclone, generate greater tangential velocity and have good enhance effect. The device has simple structure, easy process and stable and reliable operation without movable parts.

Description

technical field [0001] The invention relates to a set of supersonic gas cyclone condensation separation device, which is mainly used in the fields of gas purification, especially natural gas dehydration and heavy hydrocarbon separation. Background technique [0002] At present, most of my country's natural gas resources are condensate gas fields and sour gas fields, and their development is relatively late. Gas streams from wellheads in natural gas fields are almost saturated with water vapor and contain a small amount of heavy hydrocarbons. The entry of natural gas containing saturated water into the pipeline often causes a series of problems: (1) increase the power consumption of pipeline transportation and reduce the gas transmission volume; (2) CO in natural gas 2 and H 2 S dissolved in free water will form acid and corrode pipelines and equipment; (3) The hydrate crystallization formed by water and natural gas causes the local accumulation of natural gas hydrate, whic...

AI Technical Summary

Problems solved by technology

The entry of natural gas containing saturated water into the pipeline often causes a series of problems: (1) increase the power consumption of pipeline transportation and reduce the gas transmission volume; (2) CO in natural gas 2 and H 2 S dissolved in free water will form acid and corrode pipelines and equipment; (3) The hydrate crystallization formed by water and natural gas causes the local accumulation of natural gas hydrate, which reduces the cross-sectional area of ​​the gas transmission pipeline, reduces the gas transmission volume, and affects the stable gas supply , which can block gas pipelines and other processing equipment in severe cases; (4) the presence of heavy hydrocarbons will also reduce the calorific value of natural gas, reduce gas transmission efficiency, and block pipelines in severe cases

The device installs delta wings in the supersonic section to generate strong swirling flow, but it is easy to generate shock waves, resulting in instability of the condensation flow field and reducing the pressure recovery performance of the device

U.S. Patent US 6372019 B1 installs a swirl generator before the Laval nozzle to make the gas rotate before accelerating. The shock wave in the device is easy to control, but vortex dissipation tends to occur after the rotating gas enters the Laval nozzle, which reduces the separation efficiency

Chinese patent ZL 200520111901, application number 200610043158.2 and application number 200810224499.9 also have the problem that rotating gas is prone to eddy dissipation

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