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

Equipment for washing and/or dewatering pulp and inserts for preventing rewetting of pulp

A technology of inserts and equipment, which is applied in the direction of washing/replacing pulp treatment liquid, pulp dehydration, chemical instruments and methods, etc., can solve the problems of complex manufacturing and a large number of welding, etc., to simplify manufacturing, reduce wear, increase stability and strength Effect

Active Publication Date: 2018-01-19
VALMET OY
View PDF16 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, this makes manufacturing more complicated as it requires a lot of welding

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
  • Equipment for washing and/or dewatering pulp and inserts for preventing rewetting of pulp
  • Equipment for washing and/or dewatering pulp and inserts for preventing rewetting of pulp
  • Equipment for washing and/or dewatering pulp and inserts for preventing rewetting of pulp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] figure 1 Rewetting is shown in relation to a roll press with two cooperating press rolls 102, 104 counter-rotating in directions of rotation R1 and R2, respectively, the pulp 108 being fed in the direction of rotation R1, R2 of the press rolls 102, 104 And up through the nip 106 formed between the press rolls 102,104. Within the nip 106 , a liquid called filtrate is pressed from the pulp into a plurality of filtrate channels 112 , 114 through the permeable cover elements 116 , 118 of each press roll 102 , 104 .

[0026] After the press nip 106 , the pressure of the pulp 108 is reduced and the filtrate 110 that has not yet exited the filtrate channels 112 , 114 returns through the cover elements 116 , 118 , wetting and diluting the pulp 108 . exist figure 1 , rewet is shown by arrows from each filtrate channel 112 , 114 to the rewet region A above the nip 106 . The pulp 108 has a maximum dryness at a first point B before the rewet zone A, while the pulp 108 leaving th...

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 relates to a device for washing and / or dewatering pulp, said device comprising: two rotatable press rolls (202, 204) with a roll gap (238) between them, each press roll (202, 204) including an axis ( 203,205); a cover element (206,208) having a permeable outer surface and an inner surface; an axial inner barrel (222,224); and a radial wall (226,228,230,232) disposed between the cover element (206,208) and between the axial inner barrels (222,224), thereby forming an axial filtrate channel (210,212) between the cover element (206,208), the axial inner barrel (222,224) and the radial wall (226,228,230,232), the filtrate channel (210,212) are arranged to receive filtrate from the pulp. According to the invention, each press roll (202, 204) is arranged to rotate with the direction of rotation (R1, R2) such that the pulp is arranged to be fed upwardly through the roll nip (238); and at least one filtrate channel (210, 212) is provided with a diameter Inclined wall (241) between facing wall (226, 228, 230, 232) and cover element (206, 208), which inclined wall (241) points in the same direction as the direction of rotation (R1, R2) to prevent liquid from escaping from the filtrate channel (210, 212) Flow to the outer surface of the cover elements (206, 208).

Description

technical field [0001] The invention relates to a rotatable press roll and an apparatus for washing and / or dewatering pulp and an insert for preventing rewetting of pulp in such an apparatus. Background technique [0002] Fiber lines for the production of cellulose-based products include some type of washing equipment to separate the cooking liquor from the pulp. Later in the process, the washing apparatus is also arranged to separate the bleaching liquor after the bleaching step. There are many different types of scrubbers that work on different principles. [0003] Roll presses are often used to wash and / or dewater cellulose-containing pulp when producing cellulose-based products. A roll press comprises two cooperating and counter-rotating press rolls, each having a permeable outer surface, a so-called mantle surface, whereby the outer surface is permeable to the liquid pressed from the pulp. The pulp is deposited on the permeable outer surface and pressed in the nip, o...

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): D21C9/06B01D33/067D21C9/18
CPCD21C9/06D21C9/18B01D33/073B01D33/37B01D33/646B01D33/067
Inventor H·洛夫格兰J·法尔曼
Owner VALMET OY
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