FIELD: separation and cleaning of synthesis-gas.
SUBSTANCE: proposed section consists of device for partial condensation of synthesis-gas including the following components: heat exchanger A for cooling the synthesis-gas fed to section, separator B connected with heat exchanger A and intended for separation of synthesis-gas into gas fraction consisting mainly of hydrogen and carbon monoxide and liquid fraction consisting mainly of carbon monoxide and methane, evaporator C for further separation of gas fraction fed from separator B into gas fraction consisting mainly of hydrogen and liquid fraction consisting mainly of carbon monoxide, evaporator D where hydrogen absorbed in liquid and remaining liquid containing mainly carbon monoxide are evaporated; this liquid may be directed to distilling tower; section is also provided with one more evaporator E where hydrogen absorbed in liquid fraction of separator B is removed through evaporation; this liquid contains mainly carbon monoxide and methane; liquid may be directed to distilling tower F for separation of gaseous carbon monoxide and obtaining methane from lower part of column. Section is also provided with unit for washing with nitrogen which includes washing column G for separation of admixtures by action of nitrogen from gas fraction of evaporator C and recovery of admixtures as fuel gas. Nitrogen washing unit adjoins the partial condensation device.
EFFECT: enhanced heat exchange; low cost of process.
13 cl, 1 dwg, 1 tbl
