第3题
A、(1)析出的液态水与天然气中的某些组分形成固态水合物,从而堵塞管道或设备The resulting liquid water forms a solid hydrate with some components of natural gas, clogging pipes or equipment;
B、(2)析出的液态水会加剧管内壁的腐蚀,尤其是当天然气中含有硫化氢和二氧化碳时更为严重The resulting liquid water can exacerbate corrosion on the inside of the pipe, especially when natural gas contains hydrogen sulfide and carbon dioxide;
C、(3)水积聚后减小流通面积增加输气阻力。如果析出的液态水太多,管道中可能会出现气液两相段塞流,在干线输气管道上不允许出现After the accumulation of water, the flow area decreases and the resistance of gas transmission increases. If too much liquid water is precipitated, gas-liquid two-phase slug flow may occur in the pipeline, which is not allowed in the main pipeline;
D、(4)水蒸气降低湿天然气的热值Water vapor reduces the calorific value of wet natural gas。
第8题
A、会减少输气截面,增加输气阻力
B、酸性气体(H2S,CO2)形成酸性水溶液,对管内壁产生腐蚀
C、在一定压力、温度条件下,水还能和天然气中的轻组分生成固体冰雪状水合物,堵塞管道
D、水蒸气会降低天然气热值
第9题
A. 钙
B. 铁
C. 铜
D. 水
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