FIELD: air separation plants including extraction of argon.
SUBSTANCE: proposed plant has lower and upper two-stage rectification columns fitted with branch pipes, unit for cleaning argon from oxygen, unit for cleaning argon from nitrogen, dephlegmator with branch pipes and liquid argon reservoir; unit for cleaning argon from oxygen is made in form of raw argon column; unit for cleaning argon from nitrogen is used for final cleaning of argon from oxygen; it is just pure argon column; dephlegmator is built in upper part of pure argon column; branch pipe used for escape of gaseous raw argon is communicated with branch pipe introducing gaseous raw argon of pure argon column; branch pipe for escape of liquid raw argon of pure argon column is communicated with liquid raw argon inlet branch pipe of raw argon column; still liquid outlet branch pipe of lower two-stage rectification column is communicated with still liquid inlet branch pipe of pure argon column and still liquid inlet branch pipe of raw argon column; still liquid vapor outlet branch pipe of pure argon column and still liquid vapor outlet branch pipe of raw argon column are communicated with still liquid vapor inlet branch pipe of upper two-stage rectification column; still liquid outlet branch pipe of pure argon column and still liquid outlet branch pipe of raw argon column are communicated with still liquid inlet branch pipe of upper two-stage rectification column; dephlegmator strippant outlet branch pipe is communicated with strippant inlet branch pipe of upper two-stage rectification column; liquid argon outlet branch pipe of collector of lower peripheral contact part of pure argon column is communicated with liquid argon inlet branch pipe of liquid argon reservoir; argon vapor outlet branch pipe of liquid argon reservoir is communicated with argon vapor inlet branch pipe of collector of lower peripheral contact part of pure argon column.
EFFECT: enhanced efficiency at standard packing of column.
3 cl, 2 dwg
