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

Application of gas buffered heat pipe for preventing dew-point corrosion

A gas-filled heat pipe and dew point corrosion technology, which is applied in the direction of damage protection, heat exchange equipment, indirect heat exchangers, etc., can solve the problems that have not been seen in the application, and achieve the effect of avoiding dew point corrosion

Inactive Publication Date: 2010-06-02
余传林 +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the concept of gas-filled heat pipes has been proposed for a long time, its application background is mainly in aerospace and fields that require precise control of thermal loads. It is called "variable thermal conductivity heat pipes" in relevant literature. At present, it has not been seen that in order to prevent dew point corrosion in the low temperature section Application of flue gas waste heat recovery

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
  • Application of gas buffered heat pipe for preventing dew-point corrosion
  • Application of gas buffered heat pipe for preventing dew-point corrosion
  • Application of gas buffered heat pipe for preventing dew-point corrosion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] A heat pipe air preheater is used to recover the exhaust heat of a certain boiler. After design, the geometric characteristics of the selected carbon steel-water heat pipe elements are as follows:

[0070] The outer diameter of the base tube: 38mm, the inner diameter of the base tube is 32mm, the wall thickness is 3mm, the length of the evaporation section Le=2.0m, the length of the cooling section Lc=1.5m, there are high-frequency welded spiral circular fins on the outside of the base tube, and the fin spacing Both are 8mm, and the fin height is 16mm;

[0071] The flue gas inlet temperature is 220°C and the outlet temperature is 150°C; the air inlet temperature is 20°C and the outlet temperature is 100°C.

[0072] After calculation, the acid dew point of the smoke exhaust is 120°C. In order to prevent dew point corrosion, it is planned to use air-filled heat pipes. It is hoped that the wall temperature of all heat pipes will be above 130°C. Try to calculate the length ...

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 an application of a gas-filled heat pipe in avoiding the dew point corrosion of a heat pipe exchanger. The gas-filled heat pipe comprises an evaporation segment and a condensation segment filled with a work substance. The application is characterized in that the condensation segment is also simultaneously filled with inert gases or nitrogen gas according to specified lengthand specified quantity of filled gases and can be filled with a mixture combined by gas molecules and the steam molecule of the work substance. The filled inert gases can automatically change occupied volume and filled gas length so as to change and adjust the temperature in the pipe and wall surface temperature, thus achieving the purpose of avoiding the dew point corrosion of the heat pipe.

Description

technical field [0001] The present invention relates to a direct contact heat exchange device with two heat exchange media of state change being gas or steam, in particular to a heat pipe with an evaporation section and a condensation section. Background technique [0002] In order to improve energy utilization and achieve the energy-saving goal of "consumption reduction and emission reduction", the exhaust gas temperature of energy equipment such as boilers is required to be reduced as much as possible, from the original exhaust gas temperature of 220-180 °C to 160-150 °C. It is even required to drop even lower, reaching 120-100°C. [0003] The biggest challenge encountered in the application of heat pipe heat exchangers such as heat pipe air preheaters and heat pipe economizers in low-temperature smoke exhaust environments is the acid dew point corrosion of flue gas, especially when burning coal and heavy oil with high sulfur content. more serious. In order to avoid dew ...

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): F28D15/02
CPCF28D15/0275F28D15/0283F28F19/00
Inventor 余传林刘纪福
Owner 余传林
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