湿气再循环超音速分离管可以将天然气中的液体和烃类有效地分离出来,并可以将气体进行循环分离,从而提高分离效率.为了对该装置的脱水性能进行系统全面的研究,搭建了室内试验台.试验结果表明:相比已研发的超音速分离技术,在相同压损比下再循环超音速分离管可以获得更高的露点降,说明其具有更好的脱水分离性能;当压损比为0.81时,该装置最大露点降可以达到28.12 ℃;压损比是决定再循环超音速分离管脱水性能的关键因素,在允许范围内适当增加压损比是提高再循环超音速分离管脱水性能的有效途径;保持气流在分离管内部的Laval喷管喉部处于临界状态,并达到临界流量是保证再循环超音速分离管良好工作性能的低限要求,否则会降低装置的脱水性能;湿气出口压力对再循环分离管的脱水性能影响很小.所得结论可为湿气再循环超音速分离管的结构优化和现场应用提供参考.%The wet-recycling supersonic separator can effectively separate the liquids and hydrocarbon in natural gas from hydrocarbons, and separate the gas to recycling, thus improving separation efficiency.To carry out a systematic and comprehensive study on the dehydration performance of the device, an indoor test device has been built.The results show that, compared with the developed supersonic separator, higher dew point drop can be obtained by recycling supersonic separator under the same pressure loss ratio, which indicates a better dehydration separation performance.When the pressure loss ratio is 0.81, the maximum dew point drop of the device can reach 28.12 ℃.The pressure loss ratio is the key factor to determine the dehydration performance of the recycling supersonic separator.Appropriate increase of the pressure loss ratio within the allowable range is an effective way to improving the dehydration performance of recycling supersonic separator.Keeping the air flow in the Laval nozzle throat inside the recycling supersonic separator at critical state and reaching the critical flow rate is the lowest limit requirements to ensure the good working performance of the recycling supersonic separator, otherwise the device`s dehydration performance will be reduced.The wet gas outlet pressure has little effect on the dehydration performance of the recycling supersonic separator.Decreasing the wet gas outlet pressure could help attaining lower dew point or higher dew point drop, but the effect is not obvious.The conclusion can provide the reference for the structural optimization and field application of the wet-recycling supersonic separator.
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