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

A technology for oxidizing tail gas and recovery rate, which is applied in the direction of combined devices, steam condensation, chemical instruments and methods, etc., can solve problems such as running loss, environmental pollution, and strong volatility of aromatics, so as to prolong service life, reduce environmental pollution, reduce Effect of Aromatics Concentration

Inactive Publication Date: 2016-11-23
HUBEI SANNING CHEM
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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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  • Device for increasing recovery rate of aromatic hydrocarbons of oxidized tail gas of hydrogen peroxide

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Embodiment Construction

[0017] Such as figure 1 As shown, a device for improving the recovery rate of aromatics in hydrogen peroxide oxidation tail gas includes a primary condenser 1, an intermediate separation tank 2, a secondary condenser 3, a cyclone separator 4 and an oil-water separator 5. The primary condenser 1 is connected to the intermediate separation tank 2 through a pipeline, the top gas phase outlet of the intermediate separation tank 2 is connected to the top of the secondary condenser 3 through a pipeline, and the bottom liquid phase outlet is connected to the oil-water separator 5 through a pipeline; the secondary condenser The outlet of 3 is connected with the inlet of cyclone separator 4; the outlet of liquid phase at the bottom of cyclone separator 4 is connected to oil-water separator 5 through pipelines. The lower part of the intermediate separation tank 2 is provided with a liquid level gauge, and a wire mesh demister and an eddy current prevention baffle are arranged inside. A...

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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...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D50/00B01D5/00B01D17/028
Inventor 李万清魏天荣项翔刘继前
Owner HUBEI SANNING CHEM
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