Compact type DOC-DPF-SCR post-treatment device

Abstract

The invention discloses a compact type DOC-DPF-SCR posttreatment device which is integrally of a U-shaped structure. The compact type DOC-DPF-SCR posttreatment device sequentially comprises a DOC-DPFunit, a gas inlet mixer and an SCR unit from one end to the other end, wherein the DOC-DPF unit, the gas inlet mixer and the SCR unit are connected, the DOC-DPF unit is provided with an upward opening, and the opening is used for inflow of to-be-treated gas. It can be known from the above content that the DOC-DPF-SCR posttreatment device is a U-shaped structure design, the U-shaped double-barrel type design can better combine discharging and space characteristics and has good whole vehicle application matching advantages compared with a traditional box type posttreatment device, and vertical assembling, horizontal assembling, inclined assembling and other assembling can be conducted according to the actual installing space so as to cope with the double-front-axle compact vehicle type installing space. Thus, the provided compact type DOC-DPF-SCR posttreatment device can achieve double-front-axle vehicle type installation, and the problems in the field at the current stage are solved.

Description

technical field [0001] The invention relates to a diesel engine aftertreatment system, more specifically, to a compact DOC-DPF-SCR aftertreatment device. Background technique [0002] With the aggravation of the air pollution situation, the country's emission requirements for diesel engines are becoming more and more stringent. In order to meet the implementation of the National VI emission regulations, related products have become the focus of research in this field. [0003] As far as the prior art is concerned, the heavy-duty displacement engine usually adopts a DOC-DPF-SCR post-processing device assembly with a box-type structure. This structure has a regular appearance and a large volume. design, such as Figure 5 As shown, the layout of the exhaust pipeline of the whole vehicle is restricted. In recent years, double-front-axle models have attracted much attention due to their good economy; however, the vehicle layout of such models is relatively compact, and the space...

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Problems solved by technology

[0003] As far as the prior art is concerned, the heavy-duty displacement engine usually adopts a DOC-DPF-SCR post-processing device assembly with a box-type structure. This structure has a regular appearance and a large volume. design, such as Figure 5 As shown, the arrangement of exhaust pipes of the whole vehicle is restricted

In recent years, double-front-axle models have attracted much attention due to their good economy; however, the vehicle layout of such models is relatively compact, and the space left for the after-treatment system is even more limited, making the existing DOC-DPF-SCR Aftertreatment devices are difficult to arrange and installation is limited

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