The light hydrocarbon recovery unit (also called Light ends recovery skid or Light ends recovery unit) recovers CNG, propane, butane, NGL. In order to make the proposed unit safe, reliable and easy to operate and maintain, the unit will be designed with mature and reliable process technology to make the process simple, flexible, reliable and convenient to maintain. Feed gas Inlet gas volume： 5900 Sm3 / h (5MMSCFD) Inlet pressure： 1034 KPa.g Inlet temperature： 79 ℃ Moisture content： (bbl /day)   1.272m3/d (8bbl / day) Composition (mol%)： (dry basis): Table 1-1 composition of air source Component Mol% CO2 0.89 N2 0.02 H2S 0 H2O 0 C1 71.11 C2 11.96 C3 9.32 iC4 1.4 nC4 2.97 iC5 0.63 nC5 0.79 C6 0.48 C7+ 0.43 total 100   Utility conditions Electrical power The high and low voltage power supply in the plant area is provided by the gas generator, and the specifications are as follows: 220V (+ 7%, - 10%), 50Hz (± 0.5 Hz), single phase 380V (± 7%), 50Hz (± 0.5 Hz), three-phase 10kV (± 7%), 50Hz (± 0.5 Hz), three-phase Compressed air and nitrogen Non purified air 0.6MPa (g), water dew point ≤ - 40 ℃ (under the pressure of 0.6MPa (g)) Purified air 0.6MPa (g), 40 ℃, water dew point ≤ - 40 ℃ (under the pressure of 0.6MPa (g)) Nitrogen 0.5MPa (g), 40 ℃, purity ≥ 99.9% (vol), water dew point ≤ - 50 ℃ (under the pressure of 0.5MPa (g))