scholarly journals Fundamentals of Paper Drying – Theory and Application from Industrial Perspective

10.5772/21594 ◽  
2011 ◽  
Author(s):  
Ajit K
Keyword(s):  
Paper Drying

Friction, heat and mass transfer for paper drying

1998 ◽  
Vol 41 (10) ◽  
pp. 1313-1325 ◽  
Author(s):  
S.A. Reardon ◽  
M.R. Davis ◽  
P.E. Doe
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Paper Drying ◽  
Friction Heat

Modeling of Energy-Saving Optimization Model by Sub-Sheet Dryness Coordination Based on Muti-Agent

2011 ◽  
Vol 347-353 ◽  
pp. 3171-3174
Author(s):  
Ding Hua Zhang ◽  
Huan Bin Liu ◽  
Ji Geng Li
Keyword(s):  
Energy Consumption ◽  
Energy Balance ◽  
Network Topology ◽  
Optimization Model ◽  
Optimal Algorithms ◽  
Drying Process ◽  
Paper Drying ◽  
Contract Net ◽  
Linear Complementary Problem ◽  
Multi Agent

According to Multi-Agent network topology of the globe energy node in papermaking dryer section, the optimal algorithms of each part of sheet for energy consumption node Agent is designed through the mentality of designing. And multi-Agent contract net protocol is improved based on the gambling solution of mixed linear complementary problem. The overall steam saving optimization can be achieved by coordinated and local optimization and globe energy balance of each energy node for the four group of paper drying process.

Effect of dryer fabric structure on the performance of contact paper drying

2018 ◽  
Vol 37 (7) ◽  
pp. 854-863
Author(s):  
Amir Farzad Forughi ◽  
Sheldon Green ◽  
Boris Stoeber
Keyword(s):  
Paper Drying ◽  
Fabric Structure

Investigation of Flashing Flow in a Siphon to Extract Condensate in Paper Dryer Application

2019 ◽  
Author(s):  
Hamed Abdul Majeed ◽  
Ting Wang
Keyword(s):  
Cfd Simulation ◽  
Paper Industry ◽  
Volume Ratio ◽  
Piping System ◽  
Drying Process ◽  
Local Pressure ◽  
Steam Consumption ◽  
Paper Drying ◽  
Computational Fluid Dynamics Cfd ◽  
State Case

Abstract The paper industry uses steam to dry paper web through cylinder dryers. As steam condenses inside the cylinder dryer, the condensate is removed by means of either a stationary or a rotary siphon. However, during the siphoning process for transporting the condensate, flashing of the condensate occurs, which could cause backflow or discontinuity in the siphoning process. To resolve this flashing issue, two approaches have been employed: (a) increasing the amount of steam supplied to the cylinder to “blow-through” the stalled condensate-steam mixture and (b) reducing the back pressure by inducing “suction” through a thermocompressor from downstream. This practice of employing push from the upstream and suction from the downstream requires excessively large amounts of high-grade steam, resulting in an estimated 10 to 15 %, 15 to 25%, and 40 to 90 % of blow-through steam for stationary siphons, rotary siphons, and Yankee dryers respectively. The objective of this study is to investigate and improve understanding of the flashing phenomena during condensate transport through the siphon and piping system in order to develop means to reduce this excessive steam consumption during the paper drying process. A computational fluid dynamics (CFD) simulation is performed that uses the Eulerian-Eulerian multiphase method. The steady-state case is first solved to obtain the flow field without flashing. Then the transient method is initiated by employing flashing and condensation models. The results show that reduction of local pressure triggers flashing, however, flashing in turn reduces local temperature, and subsequently induces condensation, resulting in an alternating flashing and condensation behavior. To maintain continuity of the siphon flow, the inlet pressure fluctuates corresponding to the variation of total vapor volume ratio inside the siphon. The results will be used to modify the current siphon system design and operating practices to reduce steam consumption.

Modeling and Simulation of Multi-cylinder Paper Drying Processes

2011 ◽  
Author(s):  
Chang Hoe HEO ◽  
Hyunjun CHO ◽  
Seung-Jae MOON ◽  
Yeong-Koo YEO
Keyword(s):  
Modeling And Simulation ◽  
Paper Drying
Sign in / Sign up

Export Citation Format

Share Document