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

Method for continuously preparing pre-oxidized felt

A technology for pre-oxygen felt and raw materials, which is applied in heating/cooling fabrics, textiles and papermaking, fabric surface trimming, etc., and can solve the problems of poor performance of polyacrylonitrile pre-oxygen felt, inability to continuously prepare polyacrylonitrile, and easy to catch fire. , to ensure the stable operation of the process, improve the penetration of hot air, and reduce the possibility of fire

Pending Publication Date: 2020-01-14
江苏米格新材料股份有限公司
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for continuously preparing pre-oxygenated felt, which solves the problem that polyacrylonitrile pre-oxidized can not be continuously prepared at the present stage, and it is easy to catch fire during the pre-oxidized process, and the produced polyacrylonitrile pre-oxidized felt has poor performance , Insufficient oxidation, product shedding, wrinkles and other problems

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
  • Method for continuously preparing pre-oxidized felt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Selected raw materials: width 2.2m, thickness 15mm, length 50m, density 0.13g / cm 3 ;

[0029] (1) The raw materials are conveyed into the low-temperature section furnace by means of mesh belt laying conveyance, the temperature gradient is 190-198°C; the hot air circulation volume is 3500m 3 / h, steam flow 400m 3 / h, atomization aid flow rate 0.6m 3 / h, the angle between the upper and lower air deflectors and the raw material is 45°, and the reaction time is 150 minutes;

[0030] (2) The raw materials are conveyed into the furnace in the middle temperature section by means of mesh belt tiled conveyance, with a temperature gradient of 208-215°C; hot air circulation volume of 5000m 3 / h, steam flow 600m 3 / h, atomization aid flow rate 1.5m 3 / h, the angle between the upper and lower air deflectors and the raw material is 45°; the reaction time is 240min;

[0031] (3) The raw materials are transported into the furnace in the middle temperature section by means of mesh...

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
thicknessaaaaaaaaaa
densityaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for continuously preparing a pre-oxidized felt, which comprises the steps of A, carrying out low-temperature treatment, to be specific, conveying raw materials into alow-temperature hearth, circulating hot air, introducing both steam and an atomizing assistant, and starting a low-temperature cyclization reaction; B, carrying out medium-temperature treatment, to bespecific, conveying raw materials into a medium-temperature hearth, circulating hot air, introducing both steam and an atomizing assistant, and starting a primary cyclization reaction; and C, carrying out high-temperature treatment, to be specific, conveying raw materials into a high-temperature hearth, circulating hot air, and allowing the raw materials to rapidly pass through to arrive at pre-oxidation of the raw materials. The advantages of the method include increase in production efficiency by 2-3 times, and hot air circulation accompanied with steam to increase heat penetration, and thereaction rate is increased by the atomizing assistants, and the risk of ignition caused by reactive heat release in the fiber felt is avoided; and meanwhile, the strength of the obtained polyacrylonitrile pre-oxidized felt fiber is increased by 20-30%, the strength of the fibers in the pre-oxidized felt is balanced with the strength of the fibers on the surface, and the pre-oxidation degree is moderate.

Description

technical field [0001] The invention relates to the technical field of pre-oxygenated felt preparation, in particular to a method for continuously preparing pre-oxygenated felt. Background technique [0002] With the development of the economy, the demand for electricity is also increasing. Although traditional thermal power generation can meet the demand for electricity, it is accompanied by a large amount of dust pollution while generating electricity. With the improvement of environmental protection requirements, new solar power generation and wind power generation have gradually replaced thermal power generation as non-polluting power generation methods, especially solar power generation has gradually entered the market and is accepted by people. [0003] The production temperature of single crystal furnace and polycrystalline ingot furnace, which is a special equipment for solar power generation, is one of the important reasons for the increase in cost, while the carbon...

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): D04H1/08D06C7/04
CPCD04H1/08D06C7/04
Inventor 陈新华袁豪雄李凯
Owner 江苏米格新材料股份有限公司
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