Device for increasing recovery rate of aromatic hydrocarbons of oxidized tail gas of hydrogen peroxide

Abstract

A device for increasing the recovery rate of aromatic hydrocarbons of oxidized tail gas of hydrogen peroxide comprises a primary condenser, an intermediate separation tank, a secondary condenser, a cyclone separator and an oil-water separator, wherein the primary condenser is connected with the intermediate separation tank through a pipeline; a gas phase outlet at the top of the intermediate separation tank is connected with the top of the secondary condenser through a pipeline; a liquid phase outlet at the bottom of the intermediate separation tank is connected with the oil-water separator through a pipeline; an outlet of the secondary condenser is connected with an inlet of the cyclone separator; a liquid phase outlet at the bottom of the cyclone separator is connected to the oil-water separator through a pipeline. With the adoption of the device for increasing the recovery rate of the aromatic hydrocarbons of the oxidized tail gas of hydrogen peroxide, entrainment of the tail gas can be effectively reduced, the water content of the tail gas can be reduced, the recovery effect of the aromatic hydrocarbons can be enhanced, and the recovery rate can be increased.

Description

technical field [0001] The invention relates to the technical field of chemical waste gas recovery and utilization, in particular to a device for improving the recovery rate of aromatic hydrocarbons in hydrogen peroxide oxidation tail gas. Background technique [0002] The tail gas in the production of hydrogen peroxide comes from the oxidation tower. The tail gas contains a large amount of aromatic hydrocarbons. The aromatic hydrocarbons are highly volatile and easy to lose with the gas phase, and the aromatic hydrocarbons are benzene substances. If they are not recovered in time, they will seriously pollute the environment. A combination of turboexpander refrigeration and carbon fiber adsorption is usually used to recover aromatics in tail gas. The entrained water droplets (water vapor) in the oxidation tail gas will freeze into ice at zero temperature, which is easy to damage the expander. Therefore, it is necessary to control the refrigeration temperature of the expande...

AI Technical Summary

Problems solved by technology

[0002] The tail gas in the production of hydrogen peroxide comes from the oxidation tower. The tail gas contains a large amount of aromatic hydrocarbons. The aromatic hydrocarbons are highly volatile and easy to lose with the gas phase, and the aromatic hydrocarbons are benzene substances. If they are not recovered in time, they will seriously pollute the environment.

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