Manufacturing method of post-processing urea mixer for new diesel engine

1. This utility model relates to the technical field of mixers, in particular to a new type of post-processing urea mixer for diesel engines.

Background technique:

2. With the implementation of the National Phase VI emission regulations, the development of diesel engine aftertreatment that meets the requirements of the National VI regulations is becoming more and more urgent. At present, the more mature urea mixers on the market may appear on low-flow, low-temperature urban vehicles. The problems of low conversion efficiency and low conversion efficiency of selective catalytic reduction (scr) are mainly due to the following two reasons: 1. After urea atomization, it enters the scr carrier after only a 1/2 circle stroke. The stroke is short, and the urea is pyrolyzed and hydrolyzed. The incompleteness. 2. At present, the air outlet position of the mixing chamber is eccentric, and the flow field distribution on the front face of the scr carrier is uneven, resulting in uneven distribution of nh3 after pyrolysis and hydrolysis, and the utilization efficiency of scr is low.

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