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Journal articles
Magazine articles
TAPPI Journal Summaries, Paper360º July/August 2018
TAPPI Journal Summaries, Paper360º July/August 2018
Journal articles
Magazine articles
Integrated study of flue gas flow and superheating process in a recovery boiler using computational fluid dynamics and 1D-process modeling, TAPPI Journal June 2020
ABSTRACT: Superheaters are the last heat exchangers on the steam side in recovery boilers. They are typically made of expensive materials due to the high steam temperature and risks associated with ash-induced corrosion. Therefore, detailed knowledge about the steam properties and material temperature distribution is essential for improving the energy efficiency, cost efficiency, and safety of recovery boilers. In this work, for the first time, a comprehensive one-dimensional (1D) process model (1D-PM) for a superheated steam cycle is developed and linked with a full-scale three-dimensional (3D) computational fluid dynamics (CFD) model of the superheater region flue gas flow. The results indicate that: (1) the geometries of headers and superheater platens affect platen-wise steam mass flow rate distribution (3%•7%); and (2) the CFD solution of the 3D flue gas flow field and platen heat flux distribution coupled with the 1D-PM affect the platen-wise steam superheating temperature (45%•122%) and material temperature distribution (1%•6%). Moreover, it is also found that the commonly-used uniform heat flux distribution approach for the superheating process is not accurate, as it does not consider the effect of flue gas flow field in the superheater region. These new observations clearly demonstrate the value of the present integrated CFD/1D-PM modeling approach.
Journal articles
Magazine articles
Effects of a PFI refiner’s operational parameters on the swellability of recycled fiber, TAPPI Journal May 2020
ABSTRACT: This paper presents data on the effects of operational parameters (number of revolutions, linear pressure, and gap) of the PFI refiner on the swellability of recycled fiber, which was characterized by water retention value (WRV). The results showed that the increase of recycled fiber’s WRV was proportional to the number of revolutions and the linear pressure, but inversely proportional to the gap. The mathematical relation between these parameters and the fiber WRV could be described by an empirical model for gaps greater than 0.1 mm. Scanning electron microscopic images of fiber morphology showed that the basic framework of fibers could be maintained with the gap greater than 0.1 mm, but was destroyed with smaller gaps. This model provides a technical reference for quantitative control of refining treatment and an effective method for improving recycled fiber quality.
Conference papers
Development of Novel Acoustic Sensors with Learning Algorithm to Forecast Dissolving Tank Anomalies, 20PEERS Conference
Development of Novel Acoustic Sensors with Learning Algorithm to Forecast Dissolving Tank Anomalies, 20PEERS Conference
Conference papers
Advances in Online Monitoring Applications for Pulp and Paper Wastewater Treatment, 20PEERS Conference
Advances in Online Monitoring Applications for Pulp and Paper Wastewater Treatment, 20PEERS Conference
Conference papers
SETTLING AND FILTERING PROPERTIES OF GREEN LIQUOR DREGS, 20PEERS Conference
SETTLING AND FILTERING PROPERTIES OF GREEN LIQUOR DREGS, 20PEERS Conference
Conference papers
CROSS FLOW FILTRATION OF GREEN LIQUOR FOR INCREASED PULP PRODUCTION, IMPROVED GREEN LIQUOR QUALITY, AND ENERGY SAVINGS, 20PEERS Conference
CROSS FLOW FILTRATION OF GREEN LIQUOR FOR INCREASED PULP PRODUCTION, IMPROVED GREEN LIQUOR QUALITY, AND ENERGY SAVINGS, 20PEERS Conference
Conference papers
The Usefulness of Two-Side ERIC Buchner Handsheets for Deinking Agent Development, 20PEERS Conference
The Usefulness of Two-Side ERIC Buchner Handsheets for Deinking Agent Development, 20PEERS Conference
Conference papers
Can Jellyroll Smelt beEffectively Shattered?, 20PEERS Conference
Can Jellyroll Smelt beEffectively Shattered?, 20PEERS Conference
Conference papers
Quality Control In Stainless And High Alloy Castings, 20PEERS Conference
Quality Control In Stainless And High Alloy Castings, 20PEERS Conference