In this Issue:
This issue will focus on the current state of filter presses and possible alternatives when process applications require a different technology for optimization.
 Welcome to the Second Year of A&SoF. We trust that all of our readers had a safe and healthy holiday season and we wish everyone a successful 2011.
A&SoF is an e-newsletter, managed by BHS, with its sole purpose to enhance the filtration knowledge of the marketplace to solve actual plant problems.
The feedback from the first year was overwhelming. As you can imagine, process engineers are facing a daunting challenge to keep their plants and production running. This issue examines filter presses from the 1950’s to the current state. Many engineers have asked A&SoF how to improve and, more often, replace their filter presses. A second white paper article suggests various alternatives and testing programs.
I hope that you find A&SoF useful and informative. Your comments, ideas and suggestions for future issues are very appreciated. If you missed any of the issues, please click on the following link: A&SoF, to view them. We look forward to your continued input.
Barry A. Perlmutter - barry.perlmutter@bhs-filtration.com
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Featured Problem Solving Technical Articles
BHS-Filtration Inc. News & Updates:
2011 AICHE Spring Meeting, 13 – 17 March, Chicago, Illinois. View Show details and BHS presentation ,"A Treatise of Filter Cake Washing Mechanisms In Pressure and Vacuum Filtration Systems"
2011 National Science Foundation (NSF) Engineering for Sustainability and Prosperity, 4 – 7 January, Atlanta, GA. View Conference details and BHS presentation on algae and other biomass applications.
BHS Candle Filter Technology & Applications
New BHS Candle Filter, 10 m², in-stock, for immediate purchase, contact BHS for details.
For Our Existing Clients-Please Remember to Contact BHS for Your On-Site Service for 2011
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Filter Presses: A Review of Developments in Automatic Filter Presses:
Dr. M. Shirato, Emeritus Professor at Nagoya University and Honorary President of the Filtration Society — Japan Association, reviews the history, current technology and future developments of automatic filter presses in Japan.
History recounts that the first form of a filter press was contained in British patent of 1853 for obtaining seed oil through the use of numerous pressure cells. The main advantages of the filter press are high filtration velocities and low moisture content in formed filter cakes, due to the high filtration pressures that can be applied. However, disadvantages of the filter press include intermittent operation and high labour requirements. Therefore filter presses might be regarded as inferior to continuous, vacuum filters. In the middle of the 20th century, the requirements of mass production in industry had arrived. As a result increasing attention was paid to the automation of filter press operations, and the fully automatic horizontal-type and various other new types of filter press were developed in Japan. Read the full article.
White Paper: "Replacing Filter Presses and Manual Plate Filters for Removing Trace Solids from Chemical Slurries with Thin-Cake Candle Filter Technology"
This white paper article discusses the BHS Candle Filters technology as an alternative to a filter press for improved product quality with more efficient operations. The article focuses on a specialty chemicals manufacturer producing various grades of polyols from ethylene glycols that require filtration of small particles in the 1 – 2 micron range. Current production includes a manually-operated filter press at 200 – 250 degrees F. This article discusses lab and pilot plant testing and scale-up to a production unit as well as the technical benefits of the installation. Read the full process solution provided by BHS. |