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

Ship urea solution preparation device and method

A technology for preparing equipment and urea, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles. It can solve problems such as volume increase, system cost increase, and the inconsistency between the theoretical concentration and actual concentration of the solution, so as to eliminate preparation errors, The effect of improving accuracy

Active Publication Date: 2015-11-11
SUNRUI MARINE ENVIRONMENT ENG
View PDF2 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Storage time, ambient humidity, and temperature will all cause differences in the moisture absorption of urea powder, making it impossible to directly weigh the net weight of urea powder to prepare a solution
On the other hand, in the process of conveying and pouring urea powder, it is inevitable that some urea powder will remain in the conveying device or packaging. This cumulative error will also make the theoretical concentration of the solution inconsistent with the actual concentration.
In addition, in order to prevent the SCR catalyst carrier from being poisoned by metal ions and thus lose its catalytic effect, the urea solution must use first-grade ultrapure water (resistivity ≥ 18MΩ·cm), which requires special pure water manufacturing equipment to produce, resulting in increased system costs, increase in size

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
  • Ship urea solution preparation device and method
  • Ship urea solution preparation device and method
  • Ship urea solution preparation device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] The SCR system of a ship needs to prepare a standard concentration of urea solution of about 4m 3 , the packaging specification of urea powder packs is 0.08t / pack, so 23 packs of powder packs are required, totaling 1.840t. Start the urea solution preparation device, and the powder bag conveyor will sequentially transport 23 bags of urea powder to the automatic unpacking device for unpacking; when the urea powder enters the dissolving mixer, inject 2m 3 Pure water, at the same time turn on the agitator to dissolve and stir, after stabilization, the concentration of the solution at 20 degrees Celsius is 47.0%; according to the calculation, inject 0.66m 3 Pure water, the final concentration of urea solution is 40.6%, which meets the requirements. The cost of the ship's automatic urea solution preparation device is 100,000 yuan, and the consumption of urea powder in the SCR system is 550 yuan / h; compared with the cost of urea solution of 1,000 yuan / h, the denitrification s...

Embodiment 2

[0073] The SCR system of a ship needs to prepare a standard concentration of urea solution of about 6m 3 , the packaging specification of urea powder packs is 0.1t / pack, so 28 packs of powder packs are required, totaling 2.800t. Start the urea solution preparation device, and the powder bag conveyor will sequentially transport 28 bags of urea powder to the automatic unpacking device for unpacking; when the urea powder enters the dissolving mixer, inject 3m 3 kg of pure water, and at the same time turn on the agitator to dissolve and stir. After stabilization, the concentration of the solution at 25 degrees Celsius is 44.3%; according to the calculation, inject 0.579m 3 Pure water, the final concentration of urea solution is 39.5%, which meets the requirements. The cost of the ship's automatic urea solution preparation device is 250,000 yuan, and the consumption of urea powder in the SCR system is 1,133 yuan / h; compared with the cost of urea solution of 2,060 yuan / h, the denit...

Embodiment 3

[0075] The SCR system of a ship needs to prepare a standard concentration of urea solution of about 5.5m 3 , the packaging specification of urea powder packs is 0.2t / pack, and 13 packs of powder packs are required, totaling 2.6t. Start the urea solution preparation device, and the powder bag conveyor will sequentially transport 13 bags of urea powder to the automatic unpacking device for unpacking; when the urea powder enters the dissolving mixer, inject 2.4m 3 Pure water, while turning on the agitator to dissolve and stir, the concentration of the solution at 20 degrees Celsius after stabilization is 50.9%; according to the calculation, inject 1.33m 3 Pure water, after stabilization, the concentration of urea solution at 20 degrees Celsius is 41.1%; according to the calculation, the third injection of pure water is 0.174m 3 pure water. After stabilization, the concentration of urea solution at 20 degrees Celsius is 40.1%, which meets the requirements. The ship's automatic ...

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 discloses a ship urea solution preparation device which comprises a material feeding system, a dissolution stirring device, a water supplying device, a urea solution storage tank and a control system, wherein the material feeding system is used for supplying and transferring urea powder; the urea powder is fed into the dissolution stirring device from the material feed opening of the dissolution stirring device; a concentration sensor is arranged in the dissolution stirring device; a water pump is arranged between the water supplying device and the dissolution stirring device; a urea solution injection-in pump is arranged between the urea solution storage tank and the dissolution stirring device; the control system comprises a judging device; the judging device is connected with the concentration sensor and can be used for judging whether water needs to be injected in further or not according to signals of the concentration sensor; the control system is used for controlling the water pump to inject pure water with the set amount in batches into the dissolution stirring device according to signals of the judging device. The invention also provides a ship urea solution preparation method. According to the ship urea solution preparation device and method, a urea solution is prepared in a manner of injecting the water in batches, and the influences of moisture absorption of the urea powder and scattering and leaking of the urea powder on the preparation of the urea solution can be effectively solved, so that the preparation precision of the urea solution is improved.

Description

technical field [0001] The invention relates to the field of ship equipment, in particular to a device and method for preparing a marine urea solution. Background technique [0002] To control the NO of marine diesel engine x Emissions, IMO passed the amendments to Annex VI of the "MARPOL73 / 78 Convention" "Regulations on the Prevention of Air Pollution Caused by Ships", which stipulates three levels of marine diesel engines from TierI to TierIII. x Emission standards, the most stringent Tier III emission standards will be implemented in the emission control area (ECA) from January 1, 2016. [0003] Selective Catalytic Reduction (Selective Catalytic Reduction, SCR) is a high-efficiency diesel engine exhaust after-treatment technology that can meet Tier III emission standards, that is, NO in exhaust gas x At 290°C ~ 420°C, it reacts with the reducing agent on the surface of the catalyst to generate non-toxic and pollution-free N 2 and H 2 O. When used in the marine field,...

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
IPC IPC(8): B01D53/78B01D53/56
Inventor 高健范昊张文涛于航刘光洲
Owner SUNRUI MARINE ENVIRONMENT ENG
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