Process for liquefying high methane gas
A methane gas and methane-enriched technology, applied in liquefaction, refrigeration and liquefaction, gas fuel, etc.
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[0050] Example: In order to clarify an embodiment of the present invention, by calculating the heat and material balance of the process from methane-enriched gas to liquefied methane, the optimized implementation of the present invention is simulated to produce 4 million tons of LNG production line per year. see figure 1 .
[0051] The qualified methane-enriched feed gas after pretreatment is 30800kmol / h. At a pressure of 5.9MPa and a temperature of 50°C, it passes through the precoolers E103, E105, E104, E102, and E101 in sequence from pipeline 2, and the methane-enriched gas is precooled to -33°C .
[0052] The raw material gas stream containing condensate enters the demethanizer T1501 through the pipeline 523, and most of the heavy hydrocarbon components are separated in the demethanizer, and the methane-enriched gas at the top of the tower enters through the pipeline 18 at a pressure of 5.3MPa and a temperature of -35°C. The first main heat exchanger E200, after being co...
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