Method for recycling hydrogen peroxide oxidized tail gas

A technology for oxidizing tail gas and hydrogen peroxide, applied in chemical instruments and methods, dispersed particle separation, fractional distillation, etc., can solve the problems of high operation and maintenance costs, easy to exceed the content of aromatics, and large fluctuations in the content of aromatics, reducing the degree of automation and reducing steam Dosage and the effect of improving the recovery rate

Inactive Publication Date: 2016-11-23
HUBEI SANNING CHEM
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Problems solved by technology

The carbon fibers in this method need to be replaced regularly, the steam consumption is high, the operation and maintenance costs are high, and the content of aromatics in the exhaust tail gas fluctuates greatly. The recovery capacity for exhaust gas with high aromatics content is limited, and the content of aromatics in the vented air is easy to exceed the standard, which affects the environment and wastes resources.

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  • Method for recycling hydrogen peroxide oxidized tail gas

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Embodiment Construction

[0017] Hereinafter, the present invention will be further described in conjunction with the embodiments, but the scope of protection claimed by the present invention is not limited to the scope expressed by the embodiments.

[0018] A hydrogen peroxide oxidation tail gas recovery and utilization device, which is characterized in that it comprises an absorption tower 1, a rich liquid tank 2, a stripping tower 3, a separator 4, a recovery tank 5, a rectification tower 6 and a refining tank 7 which are sequentially connected by pipelines; The device is also provided with a lean liquid tank 8, the discharge port of which is connected to the absorption tower 1, the stripping tower 3 and the rectification tower 6 are equipped with pipes connected to the feed port of the lean liquid tank 8, and the top of the absorption tower is provided with a drain Empty pipe.

[0019] An adsorption tank 9 is provided on the top of the absorption tower 1, and the adsorption tank 9 is filled with carbon ...

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Abstract

The invention discloses a method for recycling hydrogen peroxide oxidized tail gas. The device comprises an absorption tower, a liquid-rich tank, a stripping tower, a separator, a recycling tank, a rectifying column and a refining tank which are sequentially connected through a pipeline. The device is further provided with a barren liquid tank, a discharging port of the barren liquid tank is connected to the absorption tower, the stripping tower and the rectifying column are provided with pipelines to be connected to a feeding port of the barren liquid tank, and an evacuation pipeline is arranged at the top of the absorption tower. An adsorption tank is arranged at the top of the absorption tower, and the adsorption tank is filled with carbon fibers. The method can be applied to the oxidized tail gas treatment process during hydrogen peroxide production, arene is recycled from the oxidized tail gas, the raw material consumption of the device is reduced, meanwhile, energy consumption can be reduced, and environmental protection can be achieved.

Description

Technical field [0001] The invention relates to the technical field of chemical waste gas recovery and utilization, in particular to a separation and recovery device for oxidized tail gas aromatic hydrocarbons in hydrogen peroxide production. Background technique [0002] The tail gas in hydrogen peroxide production comes from the oxidation tower. The tail gas contains a lot of aromatic hydrocarbons. The aromatic hydrocarbons are highly volatile and easily run away with the gas phase. The aromatic hydrocarbons are benzene substances. If they are not recovered in time, they will seriously pollute the environment. The general treatment method is to first condense most of the aromatics gas through a heat exchanger, and then use the pressure of the oxidized tail gas as power, cool down by the expansion unit, and further condense and recover the heavy aromatics in the tail gas, and then directly adsorb it through activated carbon fibers. Vent. This method requires regular replacement...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/18B01D53/02B01D3/38B01D3/14
Inventor 李万清魏天荣项翔佘林源刘继前高传平徐春和
Owner HUBEI SANNING CHEM
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