Technology and device for multi-nozzle decoking and dedusting of ethylene

The invention discloses a technology and a device for multi-nozzle decoking and dedusting of ethylene. The technology comprises the following steps: S1, high-temperature dusty flue gas is tangentiallyfed into a plurality of multi-nozzle water mist dedusters arranged in an ethylene decoking tank in parallel to form a steady gas flow; S2, cooling water is sprayed in the ethylene decoking tank, thecooling water enters the dedusters from nozzles on the sidewall of the multi-nozzle water mist dedusters to form a large amount of atomized liquid drops moving in a radical direction, and the liquid drops are in contact with the rotating gas flow of the dusty flue gas tangentially entering the dedusters to capture coke powder particles in the flue gas in order to form a new solid-liquid polymer; and S3, the solid-liquid polymer settles and aggregates at the bottoms of the dedusters under the action of gravity, and are aggregated to form a liquid seal, and the dedusted and purified gas is discharged from the top of the