Screw type adblue mixer

Abstract

The invention discloses a screw type adblue mixer. The screw type adblue mixer comprises a volute and an intake pipeline communicated with the volute. The upper part of the volute has a vertical cylindrical structure, and the lower part of the volute has a necked conical structure. A screw cap is arranged at the top end of the volute. A screw structure is arranged outside the screw cover, and is spirally downward along the periphery of the volute. A section of a round tube is arranged on the middle part of the screw cap, and is used for mounting an adblue nozzle. The intake pipeline has a tubular structure of which the internal diameter is gradually reduced along an intake direction, and is connected with the screw structure of the screw cap along the tangential direction of the periphery of the volute, so that the intake pipeline and the screw cover form a smooth screw channel. The screw type adblue mixer is simple in structure, reliable in working, free of blades, large in effective circulation area and low in exhaust resistance, and the mixing efficiency and the mixing uniformity of adblue liquid and exhaust gases are improved.

Description

technical field [0001] The invention relates to the technical field of tail gas treatment equipment, and more specifically relates to a spiral-type indigo mixer for SCR post-treatment. Background technique [0002] The existing indigo mixers used for SCR post-treatment are basically blade-type indigo mixers. This indigo mixer mainly includes a straight tube with blades inside and an indigo mixer on the side of the straight tube. Nozzle, the engine exhaust flows in from one end of the straight pipe and flows out from the other end. The blue nozzle is arranged obliquely on the side of the straight pipe. The blue liquid collides with the inner wall of the straight pipe and the blades to cause secondary crushing, and the airflow is guided by the blades. Multiple vortices are formed below, so as to achieve the purpose of uniformly mixing the blueting liquid and the exhaust gas. There are several disadvantages in this vane-type indigo mixer: one is that the injected indigo liquid...

AI Technical Summary

Problems solved by technology

This vane-type indigo mixer has the following disadvantages: the first is that the injected indigo droplets directly collide with the mixing blades and easily adhere to the surface and form crystals, thereby blocking the exhaust pipeline; The indigo liquid is sprayed into the mixer obliquely, resulting in uneven mixing between the indigo liquid and the exhaust gas; third, a long straight pipe section is required before and after the mixer, and the layout on the vehicle is difficult to meet the requirements; fourth, due to the blocking of the blades, the The effective flow cross-sectional area of ​​the exhaust pipe is reduced, resulting in greater exhaust resistance

Images