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Off-gas treatment system based on NTP technology and control method

A tail gas treatment and technology technology, which is applied in the electronic control of exhaust treatment devices, exhaust treatment, exhaust devices, etc., can solve problems such as acid rain and photochemical pollution, and achieve the effect of reducing PM and NOx emissions and efficient recycling

Inactive Publication Date: 2017-02-08
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there are some problems with this method: NO x The main oxidation product is NO 2 , NO emitted into the atmosphere 2 cause acid rain and photochemical pollution

Method used

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  • Off-gas treatment system based on NTP technology and control method
  • Off-gas treatment system based on NTP technology and control method
  • Off-gas treatment system based on NTP technology and control method

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Embodiment Construction

[0036] 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.

[0037] figure 1 The exhaust gas treatment system based on NTP technology of the present invention is shown, and the system includes an aftertreatment device, a first NTP injection system, a second NTP injection system, a power supply device, an NTP generator cooling system and a control system. The aftertreatment device includes a main exhaust pipe 101, a DPF 103, a NO x Adsorber 104 and exhaust branch 102. The first NTP injection system includes a first NTP generator 201 , a first mass flow controller 202 , an air supply fan 203 , a first injection pipeline 204 and a first nozzle 205 . The second NTP injection system includes a second NTP generator 301, a second mass flow controller 302, an air pump 303, N 2 A gas source 304 , a second injection pipeline 305 and a sec...

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Abstract

The invention provides an off-gas treatment system based on the NTP technology and a control method. The system comprises an aftertreatment device, a first NTP injection system, a second NTP injection system, a power source supply device, an NTP generator cooling system and a control system. The first NTP injection system utilizes air as an air source to generate an active substance to oxidize carbon deposits deposited in DPF and achieve off-line regeneration of the DPF. The second NTP injection system utilizes N2 as an air source to generate active gas to reduce NOx adsorbed in a NOx adsorbing device and achieve desorption of the NOx adsorbing device. The system utilizes the DPF and the NOx adsorbing device to purify and treat off gas of a diesel engine, effectively reduces PM and NOx in the off gas of the diesel engine and can remove PM and NOx at the same time. By the adoption of the two NTP injection systems, regeneration of the DPF and desorption of the NOx adsorbing device can be achieved respectively, and then efficient cyclic utilization of the DPF and the NOx adsorbing device is achieved. NOx is converted into N2 after being treated through the system, and N2 is non-poisonous and harmless and can meet the increasingly stringent emission regulation.

Description

technical field [0001] The invention relates to the field of post-treatment of diesel engines, more specifically, to an exhaust gas treatment system and control method based on NTP technology. Background technique [0002] Diesel engines are widely used in fields such as transportation and agricultural machinery because of their excellent power and economy. The harmful components in diesel engine exhaust are mainly carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NO x ), particulate matter (Particulate matter, PM) and sulfide, etc. Compared with the gasoline engine, the average air-fuel ratio of the diesel engine mixture is larger, so its CO and HC emissions are significantly lower than the gasoline engine, but the diesel engine NO x and PM emissions are higher. Reducing diesel engine NO now x Commonly used exhaust after-treatment technologies will lead to an increase in PM emissions, which increases the NO x and the difficulty of controlling PM emissions. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/022F01N3/08F01N3/029F01N9/00
CPCF01N3/0222F01N3/0293F01N3/0821F01N3/0842F01N3/0885F01N9/00F01N9/002F01N2240/28F01N2330/06F01N2370/24F01N2610/14F01N2900/1406Y02T10/40
Inventor 蔡忆昔顾林波施蕴曦濮晓宇王静李小华徐辉
Owner JIANGSU UNIV
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