Manufacture method for inner-threaded steel pipe applied to supercritical or ultra supercritical fossil power unit

A technology of ultra-supercritical and thermal power units, applied in the field of internal thread pipe manufacturing, can solve the problems of less than 100,000 k, exhaust gas emissions, resource waste, etc., and achieve the effects of prolonging service life, preventing burnout, and enhancing mixing and turbulence

Inactive Publication Date: 2012-06-27
CHANGZHOU SHENGTAK SEAMLESS STEEL TUBE
View PDF7 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The total installed capacity of electric power in my country has exceeded 300 million kW, but the average unit capacity of thermal power units is less than 100,000 kW, and the average coal consumption for power supply is 399g / kW·h, which is 70-80g / kW·h higher than the advanced level of foreign countries, about 25% or more , resulting in too much waste of resources and serious exhaust emissions

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
  • Manufacture method for inner-threaded steel pipe applied to supercritical or ultra supercritical fossil power unit
  • Manufacture method for inner-threaded steel pipe applied to supercritical or ultra supercritical fossil power unit
  • Manufacture method for inner-threaded steel pipe applied to supercritical or ultra supercritical fossil power unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] Such as figure 1 As shown, a method for manufacturing internally threaded steel pipes suitable for supercritical and ultra-supercritical thermal power units, the method is carried out according to the following process: manufacturing tube blanks - straightening - flat head and tail - flaw detection - tail head - annealing - pickling - Phosphating-lubrication-cold drawing-finished product heat treatment-straightening-head and tail cutting-non-destructive testing-surface inspection-packing-warehousing.

[0014] Wherein, the manufacturing of the tube blank includes: cutting the round steel billet according to the selected material, putting the round steel billet into an inclined-bottom furnace for heating, and piercing into a hollow steel billet through a piercing machine.

[0015] The straightening is: shaping the hollow steel slab so that it meets the requirement of non-straightness.

[0016] The flat head and tail are: the two ends of the hollow steel billet are machin...

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

PropertyMeasurementUnit
distanceaaaaaaaaaa
angleaaaaaaaaaa
Login to view more

Abstract

A manufacture method for an inner-threaded steel pipe applied to a supercritical or ultra supercritical fossil power unit comprises the following process of manufacturing a pipe blank-straightening-flattening a head portion and a tail portion-detecting defects-tail portion heading-annealing-acid washing-phosphating-lubricating-cold drawing-finished product heat treating-straightening-cutting the head portion and the tail portion-detecting defects without damage-gauge detecting-packing-putting into storage. The method achieves the processing on a seamless steel pipe with the inner wall processed into threaded lines, and the seamless steel pipe is mainly applied to a water cooled wall of a capacity utility boiler. Compared with a commonly used light pipe, the seamless steel pipe can keep nuclear boiling state under the condition of high heat load operation so that film boiling is avoided, pipe burn out is avoided, and service life of the pipe is prolonged. The pipe can be processed and manufactured through a cold extrusion method, and an inner thread of the pipe has high height and small threaded distance so that mixing and turbulence of work media in the pipe can be enhanced, a cooling effect is obviously better than that of a traditional steel pipe, and the boiler is ensured to be operated safely and reliably.

Description

technical field [0001] The invention relates to a method for manufacturing an internally threaded pipe, in particular to a method for manufacturing an internally threaded steel pipe suitable for supercritical and ultra-supercritical thermal power units. Background technique [0002] Saving primary energy, strengthening environmental protection, reducing the emission of harmful gases, and reducing the greenhouse effect of the earth have been paid more and more attention at home and abroad. The total installed capacity of electric power in my country has exceeded 300 million kW, but the average unit capacity of thermal power units is less than 100,000 kW, and the average coal consumption for power supply is 399g / kW·h, which is 70-80g / kW·h higher than the advanced level of foreign countries, about 25% or more , resulting in too much waste of resources and serious exhaust emissions. Judging from the current level of thermal power generation technology in the world, besides inte...

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): B21C1/22
Inventor 周文庆周益鑫范琪
Owner CHANGZHOU SHENGTAK SEAMLESS STEEL TUBE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap