Diesel posttreatment system provided with heating type aqueous urea pipeline
A diesel engine, post-processing technology
Inactive Publication Date: 2018-02-16
GUANGXI YUCHAI MASCH CO LTD
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Problems solved by technology
[0005] The purpose of the present invention is to provide a diesel engine post-treatment system with heated blue-filling pipelines, so as to overcome the long pipeline length of the diesel post-treatment system in the prior art, which is difficult to arrange, uneven heating of the blue-filling pipeline, easy blockage of the pipeline or Burst problem
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[0021] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.
[0022] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.
[0023] Such as Figure 1 to Figure 2 As shown in FIG. 1 and 2 , respectively, are the layout diagram of the heating-type adding blue pipeline and the structural diagram of the heating-type adding blue pipeline of the diesel engine post-treatment system according to the specific embodiment of the present invention.
[0024] The diesel engine post-treatment system with heated blue-filling pipeline of the present invention co...
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The invention discloses a diesel posttreatment system provided with a heating type aqueous urea pipeline. The system comprises a gas exhausting pipe, an aqueous urea tank, a metering injecting pump, an aqueous urea nozzle and a cooling liquid solenoid valve, wherein the gas exhausting pipe is connected with a diesel engine and used for receiving exhaust gas of the engine; the aqueous urea tank isused for storing aqueous urea; the metering injecting pump integrates a metering pump, a filter and a metering controller DCU (Decade Counting Unit); the metering controller DCU is used for counting the injecting volume of aqueous urea; the aqueous area nozzle is arranged on the gas exhausting pipe and is connected to the metering injecting pump through the heating type aqueous urea pipeline; thecooling liquid solenoid valve is used for deicing for the system; the heating type aqueous urea pipeline is formed through an aqueous urea pipe and a heating pipe which are bundled and is wrapped witha heat insulation pipe; the heating type aqueous urea pipeline comprises an aqueous urea feeding pipeline, an aqueous urea pressure pipeline and an aqueous urea cooling pipeline. The diesel posttreatment system provided with the heating type aqueous urea pipeline is reasonable in design, short in pipeline length, easy to arrange the gas exhausting pipe, high in resistance to urea crystallizing, and good in urea decomposing and mixing effects.
Description
technical field [0001] The invention belongs to the field of post-treatment of diesel engines and relates to a post-treatment system of diesel engines with a heating type blue pipeline. Background technique [0002] The blue pipe in the aftertreatment system of the diesel engine is used to connect the blue tank, the metering injection pump and the blue nozzle, so that the urea aqueous solution (the standardized urea aqueous solution used in the diesel engine aftertreatment system is called blue) flows inside the system, so It is required that the material of the blue pipe is resistant to blue corrosion, such as PTFE, PFA, VITON, EPDM materials. The blue tube also needs to ensure a certain strength to avoid being sucked flat due to the vacuum generated by the suction. [0003] However, most of the blue tubes in the existing diesel engine post-treatment systems are of a single tube structure, and the urea aqueous solution is easy to crystallize in a low temperature environmen...
Claims
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IPC IPC(8): F01N3/20F01N3/28
CPCF01N3/2066F01N3/208F01N3/28F01N2610/02F01N2610/14
Inventor 周道林黄第云林铁坚王辉
Owner GUANGXI YUCHAI MASCH CO LTD