The invention relates to an integrated
recovery process of aromatic hydrocarbons in
hydrogen peroxide oxidation
tail gas, which specifically comprises the following steps: preheating the oxidation
tail gas to 95-115 DEG C, introducing the oxidation
tail gas into an adiabatic expansion
machine for adiabatic expansion, reducing the pressure to 0.1-0.15 MPa, suddenly reducing the temperature to 3-7 DEG C, realizing
energy recovery and power generation by using the
Joule-Thomson effect, and condensing and separating out most aromatic hydrocarbons; and the condensed tail gas enters the
activated carbon adsorption
tower for deep adsorption, so that the
aromatic hydrocarbon content in the finally discharged tail gas is less than or equal to 70mg / m. Through cooperation of process units, efficient
recovery of aromatic hydrocarbons (the
total recovery rate is greater than or equal to 95%), self-sufficiency of energy and even
negative energy consumption operation (the unit tail gas treatment
energy consumption is-5-0 kW.h / 1000 m) are realized, the stability and economical efficiency of an adsorption
system are remarkably improved, and the technical problems of
high energy consumption, low
recovery rate and poor adsorption stability of a traditional cooling and adsorption process are solved.