Method and device for processing oxidized tail gas of anthraquinone process-based hydrogen peroxide production

Abstract

The invention discloses a method and a device for processing oxidized tail gas of anthraquinone process-based hydrogen peroxide production. The device comprises a heat exchanger (1), a first gas-liquid separation tank (2), a second gas-liquid separation tank (3), a turbo-expander (4) and an activated carbon adsorption apparatus (5), wherein the second gas-liquid separation tank (3), the turbo-expander (4) and the activated carbon adsorption apparatus (5) are interconnected through a pipeline; the oxidized tail gas firstly performs heat exchange through the heat exchanger (1); the cooled oxidized tail gas enters into the first gas-liquid separation tank (2), then the non-condensed gas exhausted from the first gas-liquid separation tank (2) enters into an expansion cavity of the turbo-expander (4), after being cooled under expansion work, the gas enters into the second gas-liquid separation tank (3), and the non-condensed gas exhausted from the second gas-liquid separation tank (3) enters into the heat exchanger (1) to perform heat exchange; after being heated up, the gas enters into the turbo-expander (4) to be compressed and pressurized, then, the gas enters into the activated carbon adsorption apparatus (5); the arene separated from the liquid-gas separation tanks and the activated carbon adsorption apparatus (5) is recycled.

Description

technical field [0001] The invention belongs to the technical field of anthraquinone production of hydrogen peroxide, and relates to an energy-saving and emission-reduction method and device in the oxidation process, in particular to a recovery method for anthraquinone production of hydrogen peroxide oxidation tail gas; the invention also relates to an anthraquinone Production of hydrogen peroxide oxidation tail gas recovery device. Background technique [0002] The development of hydrogen peroxide production methods has roughly experienced three development stages: electrolysis, nickel catalyst stirred tank hydrogenation process anthraquinone method and palladium catalyst fixed bed hydrogenation process anthraquinone method. At present, palladium catalyst fixed bed hydrogenation The anthraquinone method of the process is the main production method. With the increasing attention of the society on energy conservation and emission reduction and the increasingly fierce market ...

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Problems solved by technology

[0003] At present, the cooling method of oxidation exhaust gas generally adopts low-temperature water, also called ice machine method, which directly uses the cooling capacity generated by the ice machine to produce low-temperature water, and then uses low-temperature water to exchange heat with the exhaust gas in the oxidation exhaust cooler to cool the exhaust gas for recovery. Among them, the aromatic hydrocarbons, the ice machine needs to consume a certain amount of energy during the operation process, the operation cost is high, the circulating water volume and temperature are not easy to control during the operation process, and production failures are prone to occur

The activated carbon fiber adsorption device uses the adsorption of activated carbon fibers to aromatics and the desorption of steam to recover aromatics. The recovery rate is high, but a certain amount of steam is consumed, and activated carbon fibers need to be replaced regularly. In addition, after its treatment The recovered aromatics need to be distilled and refined in the preparation process before returning to the system for use. When the content of aromatics in the tail gas is high, the recovery function of the activated carbon fiber adsorption device will decay rapidly during operation, resulting in a decrease in the adsorption capacity of activated carbon fibers.

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