Offshore Communications
AccountGuest Edition My Account My Che.com Log In

Archives :: Processing & Handling :: Solids Handling

Displaying 261 - 280 of 322 stories.
July 1, 2010
Storage of bulk materials in hoppers, bins and silos is ubiquitous in the chemical process industries (CPI), and so are the challenges that go along with it. Flow stoppage (bridging or arching), variability in mixture composition (de-mixing or segregation), erratic flow, uncontrolled flow (flooding), discharge-rate limitations and structural failures are not uncommon. While the impact of vessel geometry is...
http://www.che.com/processing_and_handling/solids_handling/bins_silos_and_storage/Using-Inserts-to-Address-Solids-Flow-Problems_5810.html
June 29, 2010
This table supports the article Using Inserts to Address Solids Flow Problems, CE, July 2010, pp. 32–37. U. S. Patents       Patent # Date Title Inventors 1,731,675 Oct. 15, 1929 Sawdust Feeder McCoy, John C. 2,843,274 Jul. 15, 1958 Flow Control Baffle for Granular Material Williams, Gael M. 3,166,222 Jan. 19, 1965 Vibratory Bin Agitator Schrader, Preston H. 3,794,386 Feb. 26, 1974...
http://www.che.com/processing_and_handling/solids_handling/bins_silos_and_storage/A-cross-section-of-insert-patents_5857.html
May 1, 2010
A virtually endless number of process options are available for agglomerating powders in the chemical process industries (CPI). These processes can be divided into two main categories: agitation and compression. Agglomeration by agitation includes granulation processes, such as fluidized-bed, disc, drum and mixer granulators. Agglomeration by compression includes compaction processes, such as tabletting...
http://www.che.com/processing_and_handling/solids_handling/Agglomeration-Technology-Equipment-Selection_5641.html
April 26, 2010
Question:  What can we do to prevent caking? When our powders are packaged into bags at our plant, they appear to be free of agglomerates.  However, our customers report that when the bags are opened at their facilities, they observe an excessive amount of caked material.  This results in rework and potential losses in sales.  We suspect that moisture is the cause, but our bags include...
http://www.che.com/processing_and_handling/solids_handling/Ask-the-Experts-Cake-Prevention_5600.html
April 1, 2010
A rapid and ongoing expansion of polysilicon production capacity will likely generate an oversupply for the next several years, driving polysilicon manufacturers to further innovate processes and reduce operating costs in preparation for an impending wave of new demand. Drastic price drops experienced in 2009 are expected to continue at a slower pace in 2010, yet polysilicon producers remain poised to...
http://www.che.com/processing_and_handling/solids_handling/Polysilicon-Production_5559.html
April 1, 2010
Particulate systems are everywhere; they are responsible for bright red sunsets, the texture of chocolate and the rate of drug delivery in the human body. Particulate processing and size control originated back in prehistoric times where mixtures of pigments were finely pulverized and used in the painting of cavern walls. From those primitive beginnings, the use and processing of particulate matter has...
http://www.che.com/processing_and_handling/solids_handling/testing_and_modeling/Particle-Sizing-Across-the-CPI_5574.html
March 1, 2010
Powder agglomeration is used in a wide variety of the chemical process industries (CPI), and a virtually endless number of process options are available. Selection requires engineers to make a substantial number of design decisions, such as the choice between wet or dry processing, the intensity of mixing and shear rates, continuous versus batch operation, cross contamination of products and ease of...
http://www.che.com/processing_and_handling/solids_handling/Agglomeration-Technology-Mechanisms_5497.html
January 1, 2010
Particulate buildup and other material flow problems are common hurdles wherever dry materials find application in the chemical process industries (CPI). Since manual intervention is costly in terms of downtime, and can be quite hazardous for the personnel involved, dedicated equipment is an attractive way to either prevent or remove flow blockages. Equipment options include vibrators and air cannons and a...
http://www.che.com/processing_and_handling/solids_handling/A-Sound-Solution-to-Material-Flow-Problems_5399.html
January 1, 2010
This weigh belt helps minimize material build up Thayer Scale- Hyer Industries The Model SI Ultra-Sanitary Insertion weigh belt (photo) is designed to enable effective and efficient cleaning for sanitary applications in food processing. The weigh belt features a trough shape to help keep product away from the belt edges. The trough shape eliminates the need for side skirts, which can be an area prone to...
http://www.che.com/processing_and_handling/solids_handling/weighing/Focus-on-Weighing_5380.html
December 4, 2009
  Piab Vacuum Conveyors The UC Series of vacuum conveyors (photo) comply with Good Manufacturing Practice (GMP) standards, and are suitable for pharmaceutical processing applications, including loading and unloading coating pans, manufacturing tablet cores and handling or...
http://www.che.com/processing_and_handling/solids_handling/feeding_and_conveying/A-vacuum-conveyor-that-is-GMP-compliant_5336.html
December 4, 2009
The Megatex XD Screener provides high-capacity throughput for large-volume applications in agriculture, plastics and chemicals. The screener has a unique elliptical-linear motion designed for high screening performance with low...
http://www.che.com/processing_and_handling/solids_handling/milling_grinding_and_screening/Handle-high-volume-applications-with-this-screener_5345.html
December 1, 2009
As bulk-solids processors look for ways to save money, manufacturers of screening equipment are concentrating on maximizing the efficiency of the equipment they offer. Screening has been prominent in solid-solid separations in the chemical process industries (CPI) for decades. It is usually performed either to remove oversize particles and foreign materials from a bulk solid (scalping), to separate...
http://www.che.com/processing_and_handling/solids_handling/milling_grinding_and_screening/Screeners-target-efficiency_5321.html
September 1, 2009
Plastics are most commonly produced and sold in pellet form due to the superior handling characteristics of pellets in downstream applications. From the moment the polymer is pelletized from its molten state, the pellets or granules undergo a series of handling steps as they move from the producer to the consumer. For instance, post-pelletization steps include: • Hydraulic conveying • Drying...
http://www.che.com/processing_and_handling/solids_handling/testing_and_modeling/Measuring-Dust-and-Fines-In-Polymer-Pellets_5028.html
August 1, 2009
Many branches of the chemical process industries (CPI) make use of impact comminution to process solid matter, such as minerals, foodstuffs, pharmaceutical products, and above all, products for the chemicals industry. Impact comminution is also used for coarse crushing, but the focus of this article is fine grinding with end-product particle sizes below 500 µm. The technology of impact comminution...
http://www.che.com/processing_and_handling/solids_handling/milling_grinding_and_screening/Fine-Grinding-With-Impact-Mills_4989.html
July 1, 2009
Distribute and weigh solid library compounds automatically Compound libraries are critical to pharmaceutical companies. Liquid handling for the dissolution of library compounds has been automated for many years, but the distribution and weighing of the original solid dry-stored library compound is still done manually. The Calli-L (photo) is specifically designed for the distribution of dry, powder library...
http://www.che.com/processing_and_handling/solids_handling/weighing/Focus-on-Weighing-and-Proportioning_4921.html
June 1, 2009
Figure 1.  Vibratory feeders are particularly well-suited for fragile or friable materials, and hard-to-convey powders Figure 2. Today’s advanced electromagnetic drives address many shortcomings of earlier designs The need to move, convey and feed materials exists in virtually all segments of the chemical process industries (CPI). Vibratory feeding and conveying equipment (Figure 1) has been...
http://www.che.com/processing_and_handling/solids_handling/feeding_and_conveying/Vibratory-Feeders-And-Conveyors-Useful-Selection-Tips_4815.html
May 1, 2009
Evaporation of moisture or volatile organic compounds (VOCs) from bulk solids usually takes place in two stages: one in which the drying rate is constant, and the second in which the rate decreases over time. Devolatilization during the first stage is rapid and can be readily accomplished in flash, spray, or fluidized bed dryers. In the second stage, however, the VOC or moisture removal rate is diffusion...
http://www.che.com/processing_and_handling/solids_handling/bins_silos_and_storage/Designing-and-Operating-Gravity-Dryers_4768.html
April 1, 2009
Pneumatic conveying of bulk solids has been successfully practiced — in industries as diverse as chemical, agricultural, pharmaceutical, plastics, food, mineral processing, cement and power generation — for more than a century. Pneumatic conveying provides advantages over mechanical conveying systems in many applications, including those that require complex routing, multiple source-destination...
http://www.che.com/processing_and_handling/solids_handling/feeding_and_conveying/Understanding-Bends-In-Pneumatic-Conveying-Systems_4655.html
March 1, 2009
The patented design of this unit improves grinder efficiency The Annihilator (photo) is a twin-shaft, solids-reduction unit designed for a variety of industrial and municipal installations, including sewage lift stations, head works and sludge processing systems. The unit’s counter-rotating, hexagonal-shaft design coupled with its five-tooth, hardened-steel cutters provide the maximum shredding...
http://www.che.com/processing_and_handling/solids_handling/milling_grinding_and_screening/Focus-on-Milling-and-Grinding_4585.html
February 1, 2009
Conveyor selection is always defined by the larger project that it is meant to serve. First, there is a broad range of performance factors that must be met. Meanwhile, health, safety and environmental considerations usually outweigh the costs involved. After that, it comes down to the usual commercial considerations of price and delivery. This article covers the main parameters, benefits and disadvantages...
http://www.che.com/processing_and_handling/solids_handling/feeding_and_conveying/Selecting-A-Conveyor_4493.html
Pages: « Previous  5 6 7 8 9 10 11 12 13 [14] 15 16 17 Next »

Get more from Che.com
Get email updates in your inbox

 

Subscribe to:
Chemical Engineering Magazine

Chemical Engineering Magazine and Archives

Plant Cost Index

Join us on... Twitter LinkedIn

LinkedIn Groups

Our LinkedIn group is now over 21,000 members strong!

  1. Join other CPI professionals from all over the globe and share best practices, expertise, concerns and more.
  2. Provide feedback to Chemical Engineering Editors


Current members represent Worley Parsons, DuPont, SABIC, Fluor, Air Products, LyondellBasell, Nalco, Dow Chemical, Dow Corning, BASF, Jacobs Engineering, ExxonMobil, Shell, Chevron and more.

Join Now



We also offer the following subgroup for more targeted discussions:

Tools
Search the Buyers' Guide

Plant Cost Index

Facts at Your Fingertips (archive)

Ask the Experts

Back Issues
X
To access this area, please log in or create an account.
Username:
Password:
Forgot your password?
Request it now.
Processing...