FIELD: gas chemical industry.
SUBSTANCE: invention relates to gas chemical industry. Described is a gas-chemical complex for producing polyethylene, which consists of at least two or more pyrolysis units, each of which includes furnace section, pyrogas compression section and pyro-gas separation section, two or more polyethylene production plants, one or more production units of linear alpha-olefins (LAO), one or more liquid ethane storage tanks, one or more liquid ethylene storage tanks, one or more LAO storage tanks. Ethane raw material and/or crude propane are fed to pyrolysis units, after pyrolysis units gaseous ethylene is directed to polyethylene production plants and/or to LAO production plants. Blows of ethylene-containing gas from storage tanks of liquid ethylene and from plants for production of polyethylene and/or LAO production units are supplied to unit for compression of blow-off gases with subsequent supply to pyrolysis units for integration with pyrogas between furnace section and section of compression of pyrogas or between section of pyrogas compression and section of pyrogas separation depending on pressure of gaseous blowoffs of ethylene-containing gas at outlet of blowing gas compression unit.
EFFECT: invention solves the task of developing a gas-chemical complex producing polyethylene, which generates a wide range of polyethylene grades while simultaneously saving olefin feedstock by returning ethylene-containing gas to the process.
4 cl, 1 dwg, 1 tbl
