Graduate Thesis Or Dissertation
 

A study of liquor side fouling in sulfite spent liquor evaporators

Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/cf95jh00r

Descriptions

Attribute NameValues
Creator
Abstract
  • The effects of possible operating variables such as flow rate, surface temperature, bulk temperature, solids contents, sulfate addition and pH on the fouling of sulfite spent evaporators were studied. The study pointed out that the Ca⁺⁺ concentration difference between heated surface and bulk is the most important factor for fouling rate. The fouling rate is proportional to the concentration difference. The fouling rate per Ca driving force is also strongly affected by flow rate and is controlled by mass transfer and shear stress. The effect of mass transfer and shear stress on fouling rate in terms of velocity and concentration driving force was modelled as in the following equation. d(l/U)/dt = 3.8705E-2 * V0-33 * (Cb-Csat) for laminar flow d(l/U)/dt = 4.043E-2 * V0*8 * (Cb-Csat) - 4.793E-2 * V² * (Cb-Csat)1*07 for turbulent flow respectively. Increase of sulfate concentration in red liquor tended to reduce the fouling.
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Publisher
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome, 8-bit Grayscale) using ScandAll PRO 1.8.1 on a Fi-6670 in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces

Relationships

Parents:

This work has no parents.

In Collection:

Items

Thumbnail Title Date Uploaded Visibility Actions
file details YoonWoonYoung1989.pdf 2017-10-25 Public Download