Integrated spraying-internal circulation granular active carbon/dynamic membrane bioreactor organic waste gas treatment device and treatment method thereof

Abstract

The invention discloses an integrated spraying-internal circulation granular active carbon/dynamic membrane bioreactor organic waste gas treatment device and a treatment method thereof, and relates to the field of organic waste gas purification. The device comprises a spraying tower and a reaction chamber; an exhaust port is formed in the top end of a tower body of the spray tower, and a spray head, a splitter plate and a filler layer are arranged below the exhaust port; the bottom of the filler layer is communicated with an organic waste gas inlet; the reaction chamber is positioned below the filler layer; a membrane bioreactor, an aerator and a stirrer are mounted in the reaction chamber; a liquid outlet of the reaction chamber is communicated with a spray head through a connecting pipe, and spray liquid backflow is realized through a lifting pump; and granular active carbon is uniformly distributed in the reaction chamber. According to the invention, cyclic utilization of a spray liquid is realized, the process is simple, the device occupies a small area, the spray liquid does not need to be replaced, and the purification efficiency on the organic waste gas is high.

Description

technical field [0001] The invention relates to the field of organic waste gas purification, in particular to a treatment device for organic waste gas and a treatment process thereof. Background technique [0002] At present, waste gas containing volatile organic compounds such as acrylic acid, ethanol, and ethyl acetate will be generated in the printing industry during the use of water-based inks or organic solvents. The spray process can effectively absorb and remove organic waste gas, but the spray liquid will be used for a period of time. Afterwards, turbidity and precipitation will appear. Since the sediment produced after absorbing organic waste gas is not uniformly collected, the spray liquid pumped by the lift pump contains a large amount of sediment, and the spray liquid containing a large amount of sediment flows back to the spray tower When it is too high, it will cause blockage of nozzles and uneven spraying, resulting in substandard purification of organic waste...

AI Technical Summary

Problems solved by technology

[0002] At present, waste gas containing volatile organic compounds such as acrylic acid, ethanol, and ethyl acetate will be generated in the printing industry during the use of water-based inks or organic solvents. The spray process can effectively absorb and remove organic waste gas, but the spray liquid will be used for a period of time. Afterwards, turbidity and precipitation will appear. Since the sediment produced after absorbing organic waste gas is not uniformly collected, the spray liquid pumped by the lift pump contains a large amount of sediment, and the spray liquid containing a large amount of sediment flows back to the spray tower When the temperature is medium, it will cause blockage of nozzles and uneven spraying, resulting in substandard purification of organic waste gas and air pollution.

The traditional spraying process needs to be shut down to replace the spraying liquid regularly, which leads to an increase in the cost of waste gas treatment and spraying liquid replacement and preparation

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