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

Coal purifying equipment changing pipeline and an anticracking method thereof

A technology for transforming pipelines and purification equipment, which is applied in the direction of chemical instruments and methods, chemical/physical processes, etc., can solve the problems of shortened service life of the transformed pipeline system, influence on the operating efficiency of purification equipment, and rupture of transformed pipelines, so as to improve the anti-cracking effect, Effect of preventing cracking and reducing possibility

Active Publication Date: 2012-06-20
CHNA ENERGY INVESTMENT CORP LTD +1
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the process of starting and shutting down, due to the significant temperature difference between the transformation pipeline and the incoming process gas, the transformation pipeline system of the purification equipment is prone to stress corrosion cracking, and significant penetrating cracks appear, which leads to the rupture of the transformation pipeline , was forced to discontinue
This not only results in shortened life of the changing piping system, but also affects the operating efficiency of the purification equipment

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
  • Coal purifying equipment changing pipeline and an anticracking method thereof
  • Coal purifying equipment changing pipeline and an anticracking method thereof
  • Coal purifying equipment changing pipeline and an anticracking method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The method and device for preventing cracking of a converted pipeline according to the present invention will be described in detail below through an exemplary embodiment with reference to the accompanying drawings.

[0024] Before explaining the present invention, firstly, a brief description will be made on the cracking of the transformation pipeline when the prior art process is adopted. So that those skilled in the art can more fully understand the design principle of the present invention.

[0025] First refer to figure 1 with figure 2 , which shows a metallographic image of cracking of a transformed pipe using a prior art process flow. It can be seen from the metallographic diagram that the cracks in the pipe wall are transgranular and have few bifurcations. It is confirmed by metallographic analysis that the cracks belong to stress corrosion cracking, and the characteristics of sulfide corrosion are obvious. Furthermore, when the metallographic specimen was t...

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 coal purifying equipment changing pipeline and an anticracking method thereof.. In the method of the invention, the chaning pipeline from the upstream to the downstream comprises a cycle nitrogen blower fan, a start working heating furnace, a motorised valve and a changing furnace through changing pipeline connection. The method comprises: a. pressuring nitrogen entering into the cycle nitrogen blower fan by the cycle nitrogen blower fan; b. heating the nitrogen to the first temperature in the start working heating furnace after the nitrogen enters into the start working heating furnace at the downstream of the cycle nitrogen blower fan and; c. heating the nitrogen to lower than the second temperature of the first temperature which is higher than the dew point temperature of the changing pipeline after the nitrogen enters into the motorised valve at the downstream of the start working heating furnace; d. heating the catalyst in the changing furnace to the second temperature after the nitrogen enters into the changing furnace at the downstream of the motorised valve; e. sending the process gas with a preset pressure into the changing pipeline.

Description

technical field [0001] The invention relates to the fields of coal hydrogenation and coal chemical industry, in particular to a method for preventing cracking of coal purification equipment conversion pipelines used in coal production hydrogen and coal chemical industry and the coal purification equipment conversion pipelines used therefor. Background technique [0002] The purification equipment used in the coal-to-hydrogen and coal chemical industry needs to be started and shut down when feeding materials. During this process, the conversion pipeline of the purification equipment undergoes a nitrogen cycle process to heat the catalyst in the conversion furnace. During the process of starting and shutting down, due to the significant temperature difference between the transformation pipeline and the incoming process gas, the transformation pipeline system of the purification equipment is prone to stress corrosion cracking, and significant penetrating cracks appear, which lea...

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): B01J8/00
Inventor 贾燕中罗泽林
Owner CHNA ENERGY INVESTMENT CORP LTD
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