Low flow resistance supersonic speed gas purification and separation device

Abstract

The invention relates to a low flow resistance supersonic device for purifying and separating gas and is applied to the field of gas separation and purification such as natural gas dehydration, etc. Natural gas enters a laval nozzle by a gas inlet, the temperature and pressure thereof lowers, the speed is increased, then the gas mixture floating at high speed flows through a whirl vane, the swirl with high speed is produced, the swirl with high speed enters a separation pipe, for the temperature becomes low, when the gas is below ground pressure and saturation temperature, the water or partial dew points in the gas are condensed into liquid, for the centrifugal forces born are different, the liquid from the gas by condensation is 'flung' to the wall of the pipe and forms a very thin layer of liquor film, the liquid flows out of the separation pipe through the ring-shaped groove between the separation pipe and a diffuser pipe and flows out from the liquor outlet. Then the dry gas in which water is removed enters the diffuser pipe, and the gas flows out of the separation device by the gas outlet. The device does not comprise motion components and structure is simple; and the circulation transversal area of the laval nozzle in the device is ring-shaped and can be processed easily.

Description

technical field [0001] The invention relates to a low flow resistance supersonic gas purification and separation device, which is mainly used in the field of gas separation and purification such as natural gas dehydration. Background technique [0002] Natural gas dehydration is a very important link in the centralized treatment of natural gas before it enters the pipeline. The moisture contained in natural gas will reduce the calorific value of natural gas and increase the heat loss in the combustion process; Hydrocarbons with smaller molecules combine to form hydrates, or form liquid water droplets or solid ice at lower temperatures. All of these formations will reduce the effective flow area of ​​the pipeline, increase the pressure drop of the pipeline, and even block the pipeline. Road valve, causing safety accidents. Therefore, natural gas water separation and other treatment technologies have always been a hot topic of research. [0003] At present, the natural gas ...

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Problems solved by technology

[0008] The main problems of TEG dehydration technology are: when applied on offshore platforms, the flow of TEG is affected by the undulation of waves; the foaming of TEG solution is mainly due to the fact that TEG is contaminated by salt, hydrocarbons, dirt and corrosion Caused by inhibitor pollution; triethylene glycol circulation pipeline salt crystal blockage; large loss of triethylene glycol; corrosion of components, triethylene glycol is corrosive after being polluted or decomposed;

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