Process flow description The raw natural gas enters the inlet separator to filter out mechanical impurities and separate the free water, then enters the compressor after precision filtration by the dust filter, and is cooled to 40 ~ 45 ℃ by the cooler of the compressor itself, and then separates some water and heavy hydrocarbons (in case of excessive heavy components), and then enters the dehydration unit for deep dehydration. The dry feed gas from the dehydration skid enters the condensation separation skid, then it enters the refrigeration unit after precooling to ~ 10 ℃ through the heat exchanger. Next after cooling the feed gas to - 35 ℃ and cooling again through throttling, it enters the low-temperature separator for gas-liquid separation after The separated gas phase and liquid phase enter the deethanizer respectively, the tower top gas returns to the heat exchanger for reheating and output outside the boundary, and the tower bottom liquid enters the depropane and debutane tower for separation again. LPG at the top of the tower and stable light hydrocarbon at the bottom of the tower enter the storage tank respectively for loading and export. Consumption See table 2-2.1 for the power consumption of process power equipment of natural gas recovery unit under the above products and output. Table power consumption of process electric equipment Electrical equipment Power kw remarks Shaft power Motor power refrigerator 130 150 380V/50HZ Natural gas compressor unit 220 250 380V/50HZ Instrument air compressor 3 5.5 380V/50HZ Power consumption of instrument control system 2 2 220V/50HZ Regeneration gas heater 40 50 380V/50HZ Regeneration gas fan 5 7.5 380V/50HZ Deethanizer reboiler 100 120   Depropane and debutane Reboiler 130 150   total 530