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

Marine SCR urea solution spraying system and control method

A technology of solution injection and SCR reactor, which is applied in the direction of mechanical equipment, engine components, machines/engines, etc., and can solve the problems of insufficient reaction, waste, and failure to achieve results

Inactive Publication Date: 2015-12-23
NANTONG YATAI ENG TECH
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to make the whole system more reliable, environmentally friendly and energy-saving, the injection control of urea solution has become an important link in the system, and the precise injection of urea solution is more important. If there is less spraying, the response cannot be insufficient, and the effect cannot be achieved. Spraying too much , resulting in waste

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
  • Marine SCR urea solution spraying system and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The present invention will be described in detail below by means of the accompanying drawings.

[0016] The main reaction principle of the SCR reactor 11 is to vaporize the urea solution at high temperature and fully mix the exhaust gas in the mixer. The mixed gas is in full contact with the catalyst in the reactor. The gas reacts to generate water vapor and nitrogen to achieve the denitrification effect.

[0017] like figure 1 As shown, the present invention provides a marine SCR urea solution injection system, including a urea pump 1 and a flue, the flue is divided into a front flue 5 and a rear flue 6, and the urea pump 1 sprays urea into the front flue 5 Among them, the front flue 5 is provided with a flowmeter differential pressure transmitter 2 and a first NOx sensor 3, and the rear flue 6 is provided with a second NOx sensor 4, a urea pump 1, a flowmeter differential pressure transmitter 2, The first NOx sensor 3 and the second NOx sensor 4 are respectively ele...

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 relates to a marine SCR urea solution spraying system and a control method. An existing marine SCR urea solution spraying system cannot precisely control the amount of sprayed urea solutions. The marine SCR urea solution spraying system comprises a urea pump (1) and a flue divided into a front flue (5) and a rear flue (6), and the urea pump (1) sprays urea into the front flue (5); and the system is characterized in that a flowmeter differential pressure transmitter (2) and a first NOx sensor (3) are arranged in the front flue (5), and a second NOx sensor (4) is arranged in the rear flue (6); and the urea pump (1), the flowmeter differential pressure transmitter (2), the first NOx sensor (3) and the second NOx sensor (4) are all electrically connected with a data collecting module (7). The data collecting module is electrically connected with a central processing unit (8), and the control method is further provided. Through the provided control system and method, the sprayed amount of the urea solution can be precisely controlled.

Description

technical field [0001] The invention relates to a urea solution injection system and a control method of a marine SCR system. Background technique [0002] With the deteriorating global environment and the gradual strengthening of people's awareness of environmental protection, the air pollution caused by ships has attracted widespread attention from the international community. In October 2008, the amendment to Annex VI was discussed and approved at the MEPC58 meeting. More stringent requirements are put forward for the emission of harmful gases from ships, and three stages of nitrogen oxide emission limits are defined, namely TierⅠ, TierⅡ and TierⅢ. According to the current technical level, it is difficult to meet the Tier III standard only relying on the diesel engine's own emission reduction technology, which means that the diesel engine must achieve this goal through after-treatment technology. Among the nitrogen oxide after-treatment technologies, SCR is recognized as...

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): F01N3/20F01N3/28
CPCY02T10/12
Inventor 王德荣顾文才郭小炜徐彬彬
Owner NANTONG YATAI ENG TECH
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