Urea solution supply system and method used for SCR (selective catalytic reduction) system anti-crystallization and pump suction unit

A solution supply and pumping technology, applied in engine components, exhaust treatment, mechanical equipment, etc., can solve problems such as clogging and reduce the risk of clogging

Inactive Publication Date: 2017-05-31
重庆凯瑞伟柯斯环保科技有限公司
View PDF8 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is only suitable for medium and heavy vehicles equipped with gas storage tanks, and cannot be used on light and medium vehicles without gas. , with the risk of clogging

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Urea solution supply system and method used for SCR (selective catalytic reduction) system anti-crystallization and pump suction unit
  • Urea solution supply system and method used for SCR (selective catalytic reduction) system anti-crystallization and pump suction unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0035] Please refer to figure 1 , the present invention provides a pumping unit 1 for absorbing urea solution, temporarily storing urea solution and discharging urea solution, including interconnected pumping check valves 11 and driving pumping check valves in order from bottom to top 11 working drive units.

[0036]The pumping check valve 11 is composed of a check valve upper body 118 and a check valve lower body 111. The end of the check valve lower body 111 away from the check valve upper body 118 is provided with a first liquid inlet communicating with the outside world. hole 112 and the first liquid outlet hole 113, the end of the check valve upper body 118 away from the check valve lower body 111 is provided with a hydraulic str...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a pump suction unit which is composed of an upper one-way valve body and a lower one-way valve body. A first liquid inlet hole and a first liquid outlet hole which are communicated with the outside world are arranged on one end of the lower one-way valve body and away from the upper one-way valve body, and a hydraulic structure is arranged at one end on the upper one-way valve body and away from the lower one-way valve body; a one-way valve membrane is arranged between the upper one-way valve body and the lower one-way valve body, the one-way valve membrane is contacted with the upper one-way valve body to form a gap enabling the first liquid inlet hole and second liquid inlet hole to be communicated and contacted with the lower one-way valve body to form a gap enabling the first liquid outlet hole and second liquid outlet hole to be communicated, and the pump suction unit has the advantage of accurate control of dosage. The invention further provides a urea solution supply system and method used for SCR (selective catalytic reduction) system anti-crystallization. Since a reversing unit is arranged, a urea solution absorbed exceedingly by a pipeline can be sucked back through the pipeline, the situation that extra urea solutions are remained in the pipeline and a dosing module to produce crystallization is avoided, and risk in pipeline clogging is reduced.

Description

technical field [0001] The invention relates to a vehicle-mounted SCR system, in particular to a pumping unit and a urea solution supply system and method for anti-crystallization of the SCR system. Background technique [0002] SCR (Selective Catalytic Reduction) is a selective catalytic reduction technology. SCR technology uses ammonia or urea aqueous solution as a reducing substance. X Reduction to nitrogen and water which are harmless to the environment. Due to the selective and preferential reduction of NO by ammonia under the action of the catalyst X not preceded by O 2 The reaction is called "selective catalytic reduction". Ammonia is a good reducing agent, but it is highly irritating, and it is not convenient to use directly on the car, while urea aqueous solution is non-toxic, harmless, stable in storage, easy to transport and has no pungent smell, so it is generally used Urea aqueous solution is used as a reducing agent for the on-board SCR system. [0003] Us...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/20
CPCF01N3/206F01N3/208F01N2570/14F01N2610/02F01N2610/14F01N2610/1433Y02T10/12
Inventor 雷兵王永富杜晓科
Owner 重庆凯瑞伟柯斯环保科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap