Paper360 - November/December 2012 - (Page 26)

Inside WWW . TA P P I.ORG L JOURNA RIE NI CA S’ TE CH UR L RE SO CE W W W. TA P P I . O R G J JOURNAL SEPTEMBER 2012 | VOL. 11 NO.9 T H E PA P E R A ND PACKAGING IND UST RIE S’ T E CH NICA L RE SO UR CE 8 O.8 NO.8 VOL. 11 2012 | AUGUST INKJET PRINTING 9 Deinking of inkjet digital nonimpact printing TJ SUMMARIES THE PAPERS SUMMARIZED HERE ARE from the August and September 2012 issues of TAPPI Journal, an online publication of relevant and timely peer-reviewed research delivered via email free to all TAPPI members. To receive TAPPI Journal, join TAPPI at 9 Jeffery S. Hsieh PE R TH E PA CK AN D PA IN DU ST AG IN G N LIME KIL n duction e g g lime pro ag age age Increasin sing kiln plugga t rea st rs firs e first while dec tallation of the firs m te yst yst yste syste through inslime kiln feed system LimeFlash erica , on, in North Am t, W. Colson COST MODELING 19 An activity-based cost calculation for a kraft pulp mill Heikki Korpunen, Pekka Virtanen, Olli Dahl, Paula Jylhä, and Jori Uusitalo y llet, ll olle Polle M. Polle n M. Po Hart, Gar Peter W. Clapper, Brando H. y Michael K. Dought and William 17 17 BIOREFINE RY ati at ation tation ntation implemen ecking in e kin enecking Biorefinery debottlenecking : ry ar I: art II Part II for recove pulp mills – Part II: ti t uati aluat on valuation at existing onomic evaluation n and Techno-ec etier, and letier, and Pell zzaz, Luc Hakim Ghe art Stu Paul R. 31 Measuremets of sootblower jet strength in kraft recovery boilers – Part II: Results of the third and fourth field trials RECOVERY BOILER Honghi Tran, Ameya Pophali, Markus Bussmann, and Pasi Miikkulainen BIOREFINERY 41 27 27 BIOREFINE RY ar sugarsugarmill as a sug y i fin fine The sulfite ure biorefinery efiner orefinery flexible fut ura Bur ta Bura ata Bura Lisa X. Lai and Ren Composites from a forest biorefinery byproduct and agrofibers: Lignosulfonatephenolic type matrices reinforced with sisal fibers Cristina Gomes Da Silva, Fernando Oliveira, Elaine Cristina Ramires, Alain Castellan, and Elisabete Frollini BIOENERGY 53 39 39 PAPER PH Fate of biosludge nitrogen in black liquor evaporation and combustion Niklas Vähä-Savo, Nikolai Demartini, and Mikko Hupa ith ith wit on with a raction w Fiber inte ric een een reen forming fab on I. Gre on I. Gree Jingmei do don d ldon held Li And She YSICS 51 51 ALYSIS ANALYSIS INANT AN CONTAM nk n in and of ink and s of ink and ysi lysis Optical ana minants in taminants other con ters process wa a Körkkö, Elisa imäki pala, Mik Antti Haa and Jouko Niin ta, Koivuran in Progress ycling Paper Rec AUGUST LIME KILN Increasing lime production while decreasing kiln pluggage through installation of the first LimeFlash lime kiln feed system in North America Peter W. Hart, Gary W. Colson, Michael H. Clapper, Brandon M. Pollet, and William K. Doughty The Evadale, Tex., USA, mill recently engaged in a major lime kiln and recausticizing upgrade. The centerpiece of the project was to upgrade the existing lime kiln feed system to a new LimeFlash feed system, a trademarked technology from Andritz. The feed system in Evadale is the first installation in North America of this technology, and the second installation in the world. The feed system increased the capacity of the lime mud dryer (LMD) fed kiln from 350 tons/day of lime product to 480 tons/day of kiln product, with less than 3 percent carbonate. The feed system mixes hot flue gasses with the lime mud before the gas enters the feed end housing, which allows the kiln to operate at a higher feed end temperature without plugging and lime splitting. In startup and low capacity situations, lime mud is fed directly into the kiln rotating part, which eliminates potential plugging problems. Startup and 26 LIME KILN: Evadale mill’s LimeFlash kiln feed system. In the simulations, the flow field through the forming fabric was taken to be that of single-phase water flow without disturbance of fibers. A particle level simulation method was applied to simulate the motion of fibers in the flow through a single layer sine-wave fabric. A hundred fibers of random initial distribution were placed into the flow above the fabric. Those fibers were advected onto the fabric, forming a fiber mat. The surface roughness of the resulting fiber mat was then calculated. Results show that during the initial formation, topographic wire mark is caused partially by fiber bending and partially by the geometry of the fabric. SEPTEMBER operational experience, along with selected environmental performance, is reviewed in this research. PAPER PHYSICS Fiber interaction with a forming fabric Jingmei Li and Sheldon I. Green During sheet forming, the structure of the forming fabric leaves wire marks on the pulp mat. Paper non-uniformity caused by the wire mark can lead to ink non-uniformity in printing. Researchers investigated wire mark numerically through simulations of the interaction of individual fibers with a forming fabric. INKJET PRINTING Deinking of inkjet digital nonimpact printing Jeffery S. Hsieh Pigmented non-impact (inkjet) printing is a concern in conventional flotation deinking, due to the problems associated with the hydrophilic, submicron-size pigment particles of the ink. Preliminary experiments were conducted to evaluate the efficiency of a conventional flotation deinking process in detaching those inkjet particles from the fiber surfaces and network. A Denver D-12 laboratory flotation cell was used to test PAPER PHYSICS: Computational domain and boundary conditions for the forming fabric simulation. INKJET PRINTING: Counterclockwise, from top: pulped, floated, and reject pads of flexographicprinted (left photo) and inkjet-printed (right photo) newsprint. Paper360º NOVEMBER/DECEMBER 2012 http://WWW.TAPPI.ORG http://WWW.TAPPI.ORG

Table of Contents for the Digital Edition of Paper360 - November/December 2012

Over the Wire
Achieving Zero Landfill of Fiber
Creating a Monument to Safety
Keeping the Paper Flowing
Transforming an Industry
Supporting the Community
David Paterson Takes the Reins at Verso
New Tissue Fabric, Felt, and Roll Cover Technology
Protecting Your Mill Against Cyber Threats
Association News
TAPPISafe Takes a Page from Other Industries
Paper360° Online Exclusives

Paper360 - November/December 2012