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

System and method for removing foreign particles from an aqueous fibrous suspension

a technology of fibrous suspension and foreign particles, which is applied in the field of removing foreign particles from aqueous fibrous suspension, can solve the problems of relatively complex methods, and achieve the effect of effective possible elimination of foreign particles, without excessive high expenditur

Inactive Publication Date: 2006-11-16
VOITH PATENT GMBH
View PDF9 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a method for removing foreign particles from an aqueous fibrous suspension without excessive expense or operation requirements. The method involves selectively flotating the suspension to form separate fractions, with different flotation conditions for each fraction. The fine fraction contains most of the dyes and impurities, while the coarse fraction contains most of the flotation air. The method can be applied to recovered paper suspensions and can be adjusted based on the specific needs of the suspension. The method is efficient and effective in removing foreign particles from the suspension.

Problems solved by technology

Such methods are very effective but relatively complex, since each partial step contains a complete selective flotation for the entire fibrous paper stock.

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
  • System and method for removing foreign particles from an aqueous fibrous suspension
  • System and method for removing foreign particles from an aqueous fibrous suspension
  • System and method for removing foreign particles from an aqueous fibrous suspension

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] The particulars shown herein are by way of example and for purposes of illustrative discussion of the embodiments of the present invention only and are presented in the cause of providing what is believed to be the most useful and readily understood description of the principles and conceptual aspects of the present invention. In this regard, no attempt is made to show structural details of the present invention in more detail than is necessary for the fundamental understanding of the present invention, the description taken with the drawings making apparent to those skilled in the art how the several forms of the present invention may be embodied in practice.

[0040]FIG. 1 shows a schematic diagram in which the aqueous fibrous suspension S is first fed to a fractionation (fractioning device) 3. With such a fractionation 3, the fibers, which are significantly longer, possibly also stiffer than the other fibers, are guided into the coarse fraction G, while the short fibers, fin...

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
slot widthaaaaaaaaaa
slot widthaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

A method and system is used for removing foreign particles, e.g., printing ink particles, from an aqueous fibrous suspension, in particular recovered paper suspension. The method includes dividing the suspension in a fractionation into a fine fraction, in particular short-fiber fraction, and a coarse fraction, in particular long-fiber fraction. Both of the fractions thus formed are then treated in respectively differently operated flotations in order to carry away the foreign particles in the flotation foam. The parameters and apparatuses used of the two flotations can be optimally adjusted thereby to the conditions present in the individual fractions.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] The present application claims priority under 35 U.S.C. §119 of German Patent Application No. 10 2005 021 929.2, filed on May 12, 2005 and German Patent Application No. 10 2005 060 476.5, filed Dec. 17, 2005, the disclosures of which are expressly incorporated by reference herein in their entireties. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The invention relates to a method for removing foreign particles from an aqueous fibrous suspension and, more particularly, to a method for removing foreign particles in a recovered paper suspension with the aid of several selective flotations. [0004] 2. Discussion of Background Information [0005] Methods can be used to eliminate at least part of the undesirable solid particles, e.g., foreign particles, suspended in a paper fiber suspension. A typical method is the treatment of an aqueous fibrous suspension obtained from printed recovered paper, in which suspension of the p...

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(United States)
IPC IPC(8): D21B1/32
CPCD21B1/32D21F1/70D21B1/325Y02W30/64
Inventor DOCKAL-BAUR, JUERGENSELDER, HARALD
Owner VOITH PATENT GMBH
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