Tail gas aftertreatment box with tail gas treatment elements arranged side by side

Abstract

The invention discloses a tail gas aftertreatment box. The tail gas aftertreatment box comprises a box body (1), a diesel oxidation catalyst (2), a reductant mixer (3), selective catalytic reducers (4,5) and a reductant injector (9), wherein the box body (1) defines a box body inner space, tail gas sequentially flows through the diesel oxidation catalyst (2), the reductant mixer (3) and the selective catalytic reducers (4,5), the diesel oxidation catalyst (2), the reductant mixer (3) and the selective catalytic reducers (4,5) are born by the box body (1) and are arranged substantially parallelto each other, the reductant injector (9) is configured to eject a reductant into the reductant mixer (3), and a rotational flow guiding element (35) is arranged in the reductant mixer (3) and is used for generating a rotational flow of a mixture of the reductant and the tail gas in the reductant mixer (3).

Description

technical field [0001] The present application relates to an integrated exhaust gas after-treatment box for treating exhaust gas emitted by an engine. Background technique [0002] Engine exhaust contains harmful components. In order to reduce the emission of harmful components in exhaust gas, various after-treatment technologies have been developed. A typical integrated exhaust aftertreatment box for diesel engines suitable for installation on both sides of the vehicle chassis includes a diesel oxidation catalyst (DOC), a selective catalytic reduction (SCR) and a diesel particulate filter (DPF). ). [0003] In order to meet higher levels of exhaust emission requirements, such as Euro VI and Real Driving Emissions (RDE) test requirements, on the one hand, it is necessary to increase the exhaust treatment components, which will lead to an increase in the volume of the entire exhaust aftertreatment box. Due to the limited space on both sides of the vehicle chassis for arran...

AI Technical Summary

Problems solved by technology

[0003] In order to meet higher levels of exhaust emission requirements, such as Euro VI and Real Driving Emissions (RDE) test requirements, on the one hand, it is necessary to increase the exhaust treatment components, which will lead to an increase in the volume of the entire exhaust aftertreatment box

Due to the limited space on both sides of the vehicle chassis for installing the exhaust gas after-treatment box, the volume of the exhaust gas after-treatment box increases, making it difficult to arrange the components on both sides of the vehicle chassis

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