FIELD: oil and gas industry.
SUBSTANCE: invention relates to the gas industry, specifically to the natural gas (LNG) liquefaction technologies. Natural gas liquefaction installation under the gas distribution station (GDS) conditions includes the gas cleaning unit, the turbo expander unit, main cycle compressor and natural gas liquefaction unit with embedded expander and flash cycle, LNG storage tank farm, commercial LNG supply unit, flare unit. Gas cleaning unit is in parallel connected to the main GDS line, leading to the GDS reduction unit, after the GDS heating unit and the GDS cleaning unit. Turboexpander unit is installed downstream the gas cleaning unit. Turbo expander unit and main cycle compressor are made as the separate units. To the turboexpander unit as the power consumer an electric generator is connected. Downstream the turbo-expander unit, a gas flow separation in two parts unit is installed, one of which outlets is connected to the inlet of the natural gas liquefaction plant with the embedded expander and the flash cycle heat exchanger input, and another outlet is to the GDS gas odorization unit input. Vapor phase from the LNG storage tank farm discharge lines are connected to the condensate trap downstream the flash cycle.
EFFECT: increase in the installation efficiency.
1 cl, 1 dwg
