FIELD: oil and gas industry.
SUBSTANCE: processing method of the main natural gas with a low calorific value, contains the stage of zeolitic drying and purification of the initial main natural gas from the impurities, stage of the natural gas cryogenic separation with the helium, nitrogen and wide light hydrocarbon fraction recovery, the further stages of wide light hydrocarbon fraction purification and the stage of the saleable liquefied petroleum gas as propane, butane, fraction C5 and higher extraction. The initial main natural gas is divided into three parts: the first part is sent to the power production for their own use, the second part is sent to the production of saleable products through the subsequent stages of zeolitic drying and purification of the initial main natural gas and cryogenic separation of natural gas with helium, methane and broad fraction light hydrocarbons extraction, the subsequent purification stages of wide light hydrocarbon fraction and extracting the saleable liquified hydrogen gas, such as propane, butane, fraction C5 and high, the third part is sent to the methane compounding, extracted from the second part of the initial main natural gas.
EFFECT: development of power-efficient method of processing the main natural gas.
5 cl, 2 dwg
