Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

System and method for eliminating crystallization of selective catalytic reduction system

A selective and crystallization technology, applied in computer readable storage medium, control equipment for eliminating crystallization of selective catalytic reduction system, eliminating the field of crystallization of selective catalytic reduction system, and can solve the problem of inability to realize crystallization monitoring and other problems

Active Publication Date: 2021-09-14
BEIJING FOTON CUMMINS ENGINE
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a system and method for eliminating crystallization in the selective catalytic reduction system. The system and method aim to solve the crystallization failure problem of the SCR after-treatment system in the prior art when the urea injection is not stopped. Inspection, failure to realize crystallization monitoring, and technical problems such as multiple OBD alarms caused by untimely crystallization failures and oil dilution caused by multiple trigger regenerations

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
  • System and method for eliminating crystallization of selective catalytic reduction system
  • System and method for eliminating crystallization of selective catalytic reduction system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] A system for eliminating engine SCR post-treatment crystallization, including engine 1, ECM 2, coolant pipeline 3, electromagnetic switch 4, temperature-liquid level sensor 5, water tank 6 (the liquid is water), urea tank 7 (the Said solution is urea), water suction pipe 8 (the second suction pipe), liquid suction pipe 9 (the first suction pipe), two-position three-way solenoid valve 10, liquid transmission pipe 11 (the transmission pipe ), urea pump 12 (the pump), injection line 13, nozzle 14 (the injection device includes injection line and nozzle), DPF differential pressure and pressure sensor 15, SCR aftertreatment 16 (the selective catalytic reduction system) , outlet NOX sensor 17, inlet NOX sensor 18 and exhaust tailpipe 19.

[0085] Wherein, the inlet NOX sensor 18 is installed on the exhaust tailpipe 19 for measuring the original NOX of the engine, one end of the exhaust tailpipe 19 is connected to the engine 1, and the other end is connected to the SCR post-pr...

Embodiment 2

[0096] Based on Embodiment 1, under the normal working mode (the normal working state), the urea solution in the urea tank 7 passes through the suction pipe 9, the two-position three-way solenoid valve 10, the liquid transfer pipe 11, and the urea solution under the control of the ECM2. The pump 12, injection line 13, and nozzle 14 enter the SCR post-treatment 16 to react with NOX;

[0097] Wherein, when there is crystallization in the SCR post-processing 16 detected by the DPF differential pressure and pressure sensor 15, the outlet NOX sensor 17, and the inlet NOX sensor 18, switch to the temporary working state, the nozzle 14 is opened, and the ECM2 controls the urea pump 12 to execute Reverse, the remaining urea in the nozzle 14 returns to the urea tank 7 through the injection line 13, the urea pump 12, the liquid transfer pipe 11, the two-position three-way solenoid valve 10, and the suction pipe 9, that is, the residual urea back-absorption process, NOX-related OBD diagn...

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 method for eliminating the crystallization of a selective catalytic reduction system, which belongs to the technical field of engine and tail gas treatment. The method includes: monitoring the crystallization in the selective catalytic reduction system when it is in a normal working state; when the crystallization is monitored in the selective catalytic reduction system, switching the normal working state to a temporary working state; In the temporary working state, the elimination operation corresponding to the crystallization is performed. The present invention can monitor the crystallization in the SCR post-treatment system. The present invention handles the crystallization in the SCR post-treatment system, reduces the number of OBD alarms caused by high NOX emissions, and reduces the number of regenerations to activate the SCR performance to prevent excessive The oil dilution caused by secondary regeneration has the advantages of simple structure, low cost and good use effect.

Description

technical field [0001] The invention relates to the technical field of engine and exhaust gas treatment, in particular to a method for eliminating crystallization in a selective catalytic reduction system, a control system for eliminating crystallization in a selective catalytic reduction system, and a monitoring system for eliminating crystallization in a selective catalytic reduction system , A control device for eliminating crystallization in a selective catalytic reduction system, and a computer readable storage medium. Background technique [0002] With the upgrading of emission regulations, the SCR (Selective Catalyst Reduction) after-treatment system is widely used in diesel engines, which can effectively reduce nitrogen oxides (NOX) in exhaust gas, but in actual use, urea crystallization problem Prominent, which in turn leads to the on-board diagnostic system (On Board Diagnostics, OBD) alarm, frequent regeneration, and oil dilution problems. [0003] Application CN...

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 Patents(China)
IPC IPC(8): F01N3/20F01N11/00F01N9/00
CPCF01N3/208F01N9/002F01N11/00F01N11/002F01N2570/14F01N2610/02F01N2610/1486Y02T10/12Y02T10/40
Inventor 薛俊强杜鑫郝庆栋
Owner BEIJING FOTON CUMMINS ENGINE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com