First pass retention tappi

Author: xkic

August undefined, 2024

WebWithout use of the retention aid,the first-pass retention of all solids com- ponents decreased to 26%.The efflu- ent concentration of the saveall increased from 100 ppm to 300 ppm. Estimated overall retention of PCC was less than 60%.The remain- ing 40% PCC was lost in the sewage. The expected economic benefits did not result. Paper properties WebFirst-pass retention was measured in terms of TAPPI T261 cm-10 (2010). The white ledger stock was diluted to 0.5% using tap water. Next, the C-PAMs were diluted to a concentration of 0.1% with distilled water. ... (TAPPI T244 cm-99 1999) of the handsheets were measured. PEER-REVIEWED ARTICLE bioresources.com

Definitions and concepts - Opportunities in …

WebJun 15, 2005 · At a dose level of 0.5% cationic polyacrylamide, the zeta potential of the pulp was −1.3 mV, near zero, yielding maximum increase in retention and maximum improvement in drainage. At this dose level, improvement in drainage was 82% and first pass retention increased from 81.8 to 87.5%. WebFirst-pass retention (FPR) values are calculated from two consistency measurements: the headbox consistency and the white water consistency where cHB and cWW are the headbox and white water consistency, respectively. ABB KPM KC9 Optical Consistency Transmitters are designed for low consistency applications. porsche targa turbo s

Active Retention Control and Reduced Ash Variability …

WebThe filter was initially put in a 100 °C oven overnight to determine the total first pass retention, then in a 900 °C furnace to determine the ash content according to the TAPPI T413 om-93 (1993) standard. From the suspension composition, ash content was considered as clay content. WebVariations due to retention efficiency can be minimized by such practices as aiming for a higher level of first-pass retention (reducing the fines content of the white water), online control of white-water solids, and online control of cationic demand. ... Hubbe, M. A., “Retention and Hydrodynamic Shear,” Tappi J. 69 (8): 116 (1986). Web80 July 1991 Tappi Journal II. PEI: ExamDle of newsmint mill trial data 1171 Control Trial Concentration of PEI, YO 0 0.04 Machine speed, mlmin 990 990 Output, tonsth 22.8 22.8 Consistency after press section, Ye 42.0 42.6 Steam consumption, tons/ton of paper 1.40 1.31 A 10% increase in first-pass retention was realized. 2. porsche targa top repair

Treatment levels of 4-acetamido-TEMPO oxidized thermomechanical pulp …

(PDF) Water and Papermaking 2. White Water Components

WebFirst-pass retention (FPR) and fines retention without mat formation (Rf) were measured at room temperature using the UDDJ. To avoid mat forming, the filtrate flow-rate was … WebThe TAPPI T 826 Short span compressive strength test describes a procedure for determining the compressive resistance of containerboard. This method is intended for containerboard having a span-to-thickness ratio of 5 or less. This is equivalent to a grammage of between approximately 100 g/m 2 (20 lb/1000 ft 2) and 440 g/m 2 (90 … porsche tartan interiorhttp://www.sveacon.se/lectures/retention.pdf irish episcopal

"WebFirst-pass retention gives a practical indication of the efficiency by which fine materials are retained in a web of paper as it is being formed. First-pass retention values can be calculated from just two … " - First pass retention tappi

First pass retention tappi

Effects of new drainage, retention, and formation …

WebOct 15, 2024 · First pass retention is defined by 100% × (HB-WW) / HB where HB is the filterable solids content at a given time in the headbox and WW is the filterable solids in the white water or “tray water” that flows through the forming fabric (WW is sometimes a combination of tray and press section filterable solids).

Did you know?

WebChapter 7 - Control and optimization of retention 7-1 Retention of fine particles during paper forming 7-1-1 Whitewater 7-1-2 Calculating first pass retention 7-2 Factors impacting retention 7-3 Brief Overview of retention chemicals and their effects 7-3-1 Charge neutralization 7-3-2 Patching 7-3-3 Bridging 7-3-4 Complex and network flocculation http://www.papergrease.com/glossary/first-pass-retention/

WebThe first pass filler retention target was 50%. Refined eucalyptus pulp was blended with cationic starch and mixed for 2 minutes. Calcium carbonate was added and mixed for 30 seconds at a 1.0% consistency. The stock was diluted in the handsheet machine to a consistency of 0.6%. Web1. The stock (1-10 g/kg solids, 6 to 18 mm layer thickness) gets on the wire. 2. Drainage is assisted by foils (upto ~ 20 g/kg) and then by suction boxes. 3. The formed web leaves the "couch" at 100-200 g/kg solids. Banks of foils formed web polyester woven felt suction boxes (1) (2) (3) Papermaking www.sveacon.se Formation Viewed as Filtration

WebIn this paper, we present this APC scheme anddemonstrate its efficacy through results obtained from an Indonesian paper mill. The APC solution,implemented on ABB’s 800xA … Web22 other terms for first pass - words and phrases with similar meaning. Lists. synonyms. antonyms. definitions.

WebDefine First Time Pass Rate. or “FTPR” means the percentage obtained by dividing (a) the aggregate number of Non-Conforming Products (other than any Non-Conforming …

Web3) VBA appraises all records and publishes their approved retention periods in the appropriate RCS VB-1, PART I & PART II. 4) VBA places the Records Program Office at … irish episcopal churchWebThe “Britt jar” achieved two important goals in retention aid evaluation. i) First, it broke ground in providing an adjustable and reproducible agitation, some- thing that might represent the net effect of unit operations in the approach flow to a paper machine. porsche tartan fabric 8abWebJun 27, 2024 · For this purpose, 500 ml pulp suspension with certain consistency (0.5% (w/w)) was transferred to DDJ. Following the addition of chemicals, the filtrate was collected at 750 rpm agitation for 30 s. Finally, first pass retention was calculated according to TAPPI T261 cm-00. Transmission electron microscopy irish episcopal conferenceWebAug 2, 2013 · First-pass retention values can be calculated from just two consistency measurements, the headbox consistency, and the white water consistency. There is a … porsche taxeWebCalculate retention of paper stock according to the TAPPI standard method.TAPPI standard method computing formula is: FPR ( % ) = ( 1 - c c 0 ) × 100 Wherein: 100ml … irish equine centre submission formWebJan 1, 2024 · Published by TAPPI on January 1, 2010 Define the meanings of the retention terms commonly used in the papermaking process: overall, true, and first-pass retention. This document is referenced by: TAPPI T 281 - Open drum washer mat sampling technique Published by TAPPI on January 1, 2024 porsche targa top partsWebJan 1, 2004 · The filter was initially put in a 100 °C oven overnight to determine the total first pass retention, then in a 900 °C furnace to determine the ash content according to the TAPPI T413 om-93 (1993 ... irish equality and human rights commission