Treatment method for removing benzene series in petrochemical industrial waste gas

Abstract

The invention discloses a treatment method for removing benzene series in petrochemical industrial waste gas. The waste gas sequentially passes through a waste heat exchanger, a gas overtemperature protection device, a thermal type gas mass flow meter, a mixed gas flow control valve, a bag filter, a tungsten coil surface activation-ozonation treatment device, a flue gas washing and purifying tower and an induced draft fan to be treated. Specific surface activation characteristics of ozone on the surface of metal elementary substance is creatively used, when a tungsten coil is in a power-on hot state, ozone can fast release activated oxygen atoms on the surface of the tungsten coil to generate a strong oxidization environment on the tungsten surface, when the benzene series and other molecules containing a conjugative effect C-C bond are in the strong oxidization environment, the conjugative C-C bond will be broken by the activated oxygen atoms, benzene series molecules are finally oxidized and decomposed into H2O, CO2 and other inorganic molecules, and the purpose of removing the benzene series in the waste gas is achieved.

Description

technical field [0001] The invention relates to a treatment method for removing benzene series in petrochemical industrial waste gas, which belongs to the field of waste gas treatment in environmental protection. Background technique [0002] Benzene is a general term for benzene and its derivatives. The benzene series in the broad sense includes all aromatic compounds, and the benzene series in the narrow sense refers to the benzene ring-containing compounds that have a certain distribution in the human production and living environment and cause harm to the human body, including BTEX. [0003] Human extraction of benzene series can be traced back to the 19th century. In 1825, British scientist Faraday (Faraday) used distillation to separate high-purity benzene from the pyrolysis products of fish oil and other similar substances, calling it "heavy carbon compound of hydrogen", and determined its basic physical properties and chemical components. Since then, substances su...

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Problems solved by technology

[0017] At present, the waste gas benzene series treatment methods commonly used in my country generally have disadvantages such as large initial investment, high operation and maintenance costs, and complicated technology, and its treatment effect is difficult to meet the increasingly stringent emission requirements.

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