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Diesel engine exhaust combined treatment system and control method

A technology of combined treatment and control method, applied in the direction of electronic control, exhaust treatment, mechanical equipment, etc. of exhaust gas treatment device, can solve the problem of secondary pollution of NTP generator without considering it, achieve reduction of PM and NOx emissions, prolong The effect of the service life

Active Publication Date: 2020-12-18
JIANGSU UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This regeneration method does not take into account the excessive NO produced by the NTP generator x And cause secondary pollution and other problems

Method used

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  • Diesel engine exhaust combined treatment system and control method
  • Diesel engine exhaust combined treatment system and control method
  • Diesel engine exhaust combined treatment system and control method

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0022] Such as figure 1 As shown, the system for cooperating the NTP and SCR technology of the present invention to treat the exhaust of a diesel engine includes an aftertreatment system, an NTP injection system, an SCR system and a control system. The aftertreatment system includes a main exhaust pipe 201 , a DPF 202 , an SCR catalyst 203 and a thermoelectric conversion device 204 . The NTP injection system includes an NTP generator 301 , a mass flow controller 302 , an air supply fan 303 , a power supply device 304 , a first injection pipeline 305 , a first nozzle 306 , a water tank 307 and a water pump 308 . The SCR system includes a urea tank 401 , a urea pump 402 , a second injection pipe 403 , a second nozzle 404 , a liquid level sensor 405 and a temperature sensor...

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Abstract

The invention provides a combined treatment system for diesel engine tail gas and a control method. The combined treatment system for the diesel engine tail gas comprises an aftertreatment system, anNTP jetting system, an SCR system and a control system, the aftertreatment system, the NTP jetting system and the SCR system are all connected with the control system, and the control system is used for adjusting the working states of the systems according to information fed back by sensors. According to the combined treatment system for the diesel engine tail gas and the control method, when a diesel engine is halted, gas containing active substances is jetted into a DPF through pipelines and nozzles, the active gas and PM in the DPF achieve an oxidizing reaction, and the purpose of regenerating the DPF is achieved; the SCR system sucks and pressurizes urea through a urea pump, the urea is jetted into an SCR catalyst through pipelines and nozzles, and NOx is reduced in the SCR catalyst; and an NTP technology and an SCR technology are combined, efficient regeneration of the DPF is achieved when the diesel engine is halted on the basis that emission of the PM and the NOx is reduced in the running process of the diesel engine, and the secondary pollution problem that the excessive NOx is generated in the process of regenerating the DPF through the NTP technology is solved.

Description

technical field [0001] The invention relates to the technical field of post-treatment of diesel engine exhaust, in particular to a combined treatment system and control method for diesel engine exhaust. Background technique [0002] As one of the important power sources of vehicles, diesel engines are widely used due to their advantages such as low fuel consumption, high thermal efficiency, and low HC and CO emissions. However, diesel nitrogen oxides (NO x ) and particulate matter (Particulate Matter, PM) emissions are much higher than gasoline engines, these harmful components will seriously endanger the atmospheric environment and human health. The use of a diesel particulate filter (Diesel Particulate Filter, DPF) can effectively reduce the emission of PM in the exhaust of a diesel engine, and its filtration efficiency can reach more than 90%. However, with the gradual increase of PM deposited in the DPF, the exhaust back pressure increases significantly, which affects ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N13/00F01N3/20F01N3/027F01N3/023F01N9/00
CPCF01N3/0238F01N3/027F01N3/2013F01N3/2066F01N9/00F01N9/002F01N13/009Y02T10/12Y02T10/40
Inventor 蔡忆昔赵楠施蕴曦樊润林陈祎季亮
Owner JIANGSU UNIV