Efficient treatment device and method for benzene-containing organic waste gas in refinery plant

Abstract

The invention discloses an efficient treatment device and method for benzene-containing organic waste gas in a refinery plant. The device includes a benzene absorption unit and a waste gas incineration unit. The benzene absorption unit includes a mixer, an absorption column and a rich liquid pump. A waste gas inlet of the mixer is connected to a first pipeline, an outlet of the mixer is communicated with a first inlet disposed at the lower part of one side of the absorption column, and a second inlet at the upper part of one side of the absorption column is connected to a second pipeline. Therich liquid pump is connected between a liquid outlet at the bottom of the absorption column and a rich liquid inlet of the mixer. The waste gas incineration unit includes a first draught fan, an incineration furnace and a chimney. A vent port at the top of the absorption column is communicated with a bottom gas inlet of the incineration furnace through a third pipeline, the first draught and a gas feeding valve, and used for feeding organic waste gas discharged from the absorption column into the incineration furnace for sufficient cracking after the waste gas is pressurized. A vent port at the bottom of the incineration furnace is communicated with the chimney through a venting valve and a pipeline. The device can achieve the purpose of up-to-standard emission of the benzene-containing organic waste gas in refinery plant without generation of secondary pollutants.

Description

technical field [0001] The invention relates to the technical field of chemical equipment, in particular to a high-efficiency refinery benzene-containing organic waste gas treatment device and treatment method. Background technique [0002] Since the introduction of the VOCs comprehensive treatment policy in the petrochemical industry in 2014, petrochemical refineries have actively controlled VOCs emissions. At present, the organic waste gas of refineries is unstable due to the benzene content, and its treatment has always been a difficult problem in the treatment of VOCs in refineries. Refinery benzene-containing organic waste gas is generally treated by adsorption (activated carbon, membrane treatment), combustion, absorption and other treatment methods. Adsorption method is currently the most commonly used and mature process in the treatment of industrial waste gas. Activated carbon has been widely used in the treatment of benzene-containing organic waste gas in refinerie...

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Problems solved by technology

Water is a commonly used absorbent, but the absorption effect of water on organic gases is not obvious

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