Urea mixing structure for post-treatment

The utility model relates to a urea mixing structure for post-treatment. The urea mixing structure is characterized in that a flared cylinder covers the outer side of a heat-insulating inner-layer cylinder; the air inlet partition plate is located between the horn mouth barrel and the heat preservation inner layer barrel. The nozzle holder supporting base and the nozzle holder are welded together and are welded on the horn mouth cylinder body; the upper end of the swirl vane pipe is welded with the nozzle seat supporting base, the lower end of the swirl vane pipe is welded with the annular swirl vane pipe base, and the swirl vane pipe penetrates through the heat preservation inner layer barrel in the radial direction and is welded with the heat preservation inner layer barrel; the stainless steel winding net and the turbulent flow stainless steel pipe are combined together in a brazing mode, and the turbulent flow stainless steel pipe is welded to the lower portion of the rotational flow blade pipe base and p