The invention relates to the field of
petrochemical gas treatment, and discloses an alkali liquor oxidation regeneration
tail gas cleaning treatment and reutilization method and
system. The method comprises the steps that a,
tail gas of an alkali liquor oxidation regeneration
tower passes through an adsorption tank containing an adsorbent from bottom to top, N2, H2O and
hydrocarbon in the
tail gasare removed, and
oxygen extraction concentrated gas is obtained; b, the
oxygen-extracted concentrated gas is subjected to
settling separation by an
oxygen-extracted concentrated gas liquid separationtank to obtain liquid, and the liquid is boosted by a
supercharger and sent to a
gas cooler for cooling; c, the cooled
oxygen extraction concentrated gas is mixed with external factory air in a mixerto obtain
mixed gas; d, the
mixed gas is returned to an air inlet in the lower part of the alkali liquor oxidation regeneration
tower through an on-line analyzer; and e, when the adsorption of the adsorbent in the adsorption tank is saturated, the adsorption tank is desorbed, and desorbed gas is sent to a
gas cabinet gas collection header
pipe. By adopting the method and the
system, the situationthat alkali liquor oxidation regeneration tail gas treatment seriously depends on
combustion treatment of an incinerator or a
heating furnace can be changed, and clean production and flexible arrangement are realized.