A diesel engine exhaust aftertreatment regeneration device
A technology of exhaust post-treatment and regeneration device, which is applied in the direction of exhaust treatment, exhaust device, noise reduction device, etc. It can solve the problems of affecting the stability of flame flow, blockage of DPF device, affecting the treatment effect, etc., and achieves high regeneration effect , Reasonable design and simple structure
Active Publication Date: 2020-06-19
杭州恒浦机械设备有限公司
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Problems solved by technology
However, the regeneration process of the diesel engine exhaust after-treatment device is a fast and short process. When igniting the gaseous diesel, it needs to be controlled quickly and accurately to ensure that the particulate matter PM deposited in the DPF is burned out in the shortest time. The comparison Although the invention patent application scheme of the document can better fully contact the air with the gaseous diesel oil through the air dispersion disc, it takes a certain time to achieve full combustion, which is a process of continuous heating, and the exhaust gas of the diesel engine usually contains carbon monoxide, Exhaust gas such as hydrocarbons, mixed with the exhaust gas after the gaseous diesel is ignited, will affect the combustion effect of particulate matter PM
[0005] As a part of the diesel engine exhaust post-treatment regeneration device, the flow stabilization device also plays a very important role. The invention patent application with the patent publication number "CN104912631" also discloses an air flow uniform mechanism, which includes an air flow uniform piece. However The specific structure of the air flow homogenizer is not disclosed. According to the commonly used solutions in the prior art, the air flow homogenizer basically only adopts a conical plate-shaped structure. The function of the conical plate-shaped structure is to slow down the speed of the flame flow. Prevent the flame flow from passing through the DPF device without fully burning the particulate matter PM collected by the DPF. In the short-term processing work, the effect of this technical solution is still good. However, in the long-term processing process, the DPF Fouling deposits often appear around the device. These fouling deposits are caused by the accumulation of incomplete combustion of particulate matter PM. A certain position of the DPF device will produce a dead corner of combustion. Over a long period of time, the incompletely burned particulate matter PM in the dead corner will accumulate and form dirt deposits, which will eventually lead to partial blockage of the DPF device and affect the performance of the exhaust after-treatment device of the diesel engine. Processing effect
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[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the present invention and the present invention is not limited to the following examples.
[0025] see Figure 1-Figure 5 , this embodiment is a set of diesel engine exhaust aftertreatment device including regeneration device. It includes a diesel engine exhaust post-treatment device and a regeneration device. The post-treatment device includes an exhaust gas discharge port 1, an oxidation catalyst DOC5 and a wall-flow particulate filter DPF6 arranged in sequence. The regeneration device includes a heating device 3 and a flow stabilization device 4. The connection relationship between the various devices of this embodiment is as follows: exhaust gas discharge port 1, combustion chamber 2, flow stabilization device 4, oxidation type catalytic converter DOC5, wall flow type particulate filter DPF6 are connec...
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The invention relates to a diesel engine exhaust after-treatment regeneration device, and belongs to the technical field of diesel engine exhaust purifying. A heating device of the diesel engine exhaust after-treatment regeneration device is a compressed air type atomizer which can directly convert liquid diesel into atomized diesel, atomized gaseous diesel mixed gas subjected to preliminary mixing is mixed with air entering a second cavity through an air supply pipe again in the second cavity, and then the mixed gas is ejected out through an air outlet to be further proportionally mixed with diesel engine exhaust and ignited in a first cavity, diesel-gas mixed gas with the optimal fuel ratio is formed, and precise and proportional mixing control over the air, the gaseous diesel and the exhaust in a diesel engine after-treatment device is achieved on the whole. While the temperature in the first cavity is optimal, one part of flame flow passing a flow uniformizing plate can penetrate through the interior of an airflow hole, the other part can be subjected to flow guiding through a flow guiding groove, another part penetrates through the gap formed between the flow uniformizing plate and a shell of a flow stabilizer, and finally the buffering effect and the effect of uniformizing the flame flow are achieved.
Description
technical field [0001] The invention relates to a diesel engine exhaust post-treatment regeneration device, which is mainly used for the regeneration treatment of the diesel engine exhaust post-treatment device, and belongs to the technical field of exhaust gas purification of diesel engines. Background technique [0002] The principle of the diesel engine exhaust after-treatment device is to oxidize the carbon monoxide (CO) and hydrocarbons (CH) emitted by the car through the oxidation catalyst (DOC), and then use the wall flow particulate filter (DPF) to oxidize the carbon monoxide (CO) and hydrocarbons (CH). Ultrafine nano soot particles (exhaust gas particles) are filtered, and the filtered clean gas is discharged through the outlet port, thereby achieving the purpose of reducing the emission of polluting gases. [0003] Usually, the diesel engine exhaust post-processing devices in the prior art have regeneration function. The principle is: the main control unit collects...
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IPC IPC(8): F01N3/023F01N3/025
CPCF01N3/023F01N3/025F01N2240/20
Inventor朱学良黄健华
Owner杭州恒浦机械设备有限公司