Each component in a dilute-phase pneumatic conveying system — the air mover, solids feeder, pipeline, and separator — plays an important role in the system’s operation. The air mover provides the proper airflow rate required for material transport at the right velocity and pressure. This article focuses on estimating the pneumatic conveying line’s total pressure drop, which is vital in selecting a suitable air mover for your system and application.
In this column, authors Jack D. Hilbert and Colin Barbeau answer some of the questions they’ve been asked recently that pertain to problems with a pneumatic conveying system’s five main elements. These elements include the system’s material feed, the line charger, the gas mover, the conveying line, and the material receiver.
Vacuum conveying systems transport powders and bulk solids throughout a plant, but these systems also can help achieve other benefits such as making the environment safer, reclaiming material from dust collectors, making mixer loading easier, and reducing costs. This article discusses how different vacuum conveying systems can accomplish benefits like these in your plant.
A water treatment plant was using pebble lime to process and reclaim more than 30 million gallons of water a day. When pneumatically conveying the lime to silos during off-loading, the abrasive material was causing frequent elbow wall failure, causing plant downtime and other issues. In search of a fix, the plant contacted HammerTek, which replaced five existing elbows with deflection elbows. The change resulted in reduced labor and maintenance costs and safer air quality in the plant.
Vacuum pneumatic conveying provides safe transfer of bulk dry materials and can help maintain tight industry standards for sanitation and environmental safety.
Understanding the strengths and limitations of different types of pneumatic conveying systems can help you choose the one best suited to your application.
When conveying material, controlling material flow is important for many reasons, including precise measuring. Slide gates controlled by pneumatic actuators are one way to control that material flow, and a variety of control options can be added to these actuators to help with precision. This article discusses the options.
Most vacuum conveying systems don’t require custom solutions to meet your powder and bulk solids processing requirements. Pre-engineered systems are now so technically advanced that they’re useful as is for a wide range of industries. This article talks about situations, including real-world examples, when turnkey, packaged conveying systems fit and when custom enhancements are necessary.
Pneumatic conveying systems have the advantage of being able to accommodate various pipeline routing geometries, but the options aren’t limitless. In this article, columnists Jack Hilbert and Etienne Brochu first define a basic pneumatic conveying system and conveying modes and then discuss some conveying line geometry best practices.
For your pneumatic conveying system to work efficiently with other system components, each piece of equipment needs to be considered in relation to how it will impact the system as a whole. In this column, Jack and Julien discuss how filtration equipment and pneumatic conveying system operations can impact each other.
Columnist Jack D. Hilbert discusses how bulk density differences between two materials can affect a pneumatic conveying system's design and overall performance.
Static versus dynamic velocity control: Which is more beneficial in dilute-phase pneumatic conveying?
Air velocity plays a large role in how effectively and efficiently your pneumatic conveying system operates. This article discusses the positive and negative reactions that air velocity can have on a dilute-phase system. The article compares static and dynamic velocity control and the impacts each one has on blower speed, blower power, and effective velocity.
In this column, authors Jack Hilbert and Colin Barbeau provide information on the economics of pneumatic conveying with regard to how it compares with alternative forms of material conveying. Since the processes, design criteria, conditions, and technical advantages and disadvantages vary from project to project, the authors break down two different case studies as examples.
Columnist Jack D. Hilbert revisits a previously covered topic on how adding another material inlet to an already efficiently running pneumatic conveying system might affect that system.
Columnist Jack D. Hilbert follows up on Part I of his “Factors that affect pneumatic conveying” column (PBE, March 2019, p.18) in which he discusses a variety of issues that may need to be addressed when pneumatically conveying materials.
Columnist Jack Hilbert discusses the effects of temperature and moisture on pneumatic conveying system design, equipment selection, and operation.
As this new technology matures, additive manufacturing will create some serious safety and efficiency issues for those handling dense metal powders.
Columnist Jack D. Hilbert, along with contributing columnist David Renfert, explain how both pneumatic conveying and nuisance dust collection systems can become problematic when adequate planning and investment don't take place up front.
Columnist Ray Cocco explains the difference between dilute- and dense-phase conveying and offers advice on when dense-phase conveying can be a more cost-effective option.
Dry bulk material batch blending with a pneumatic blender can be accomplished in the conical hopper of a storage vessel or dense-phase pneumatic conveying transporter, rather than in a mechanical blender, saving time, labor, and capital costs.
Columnist Jack D. Hilbert reviews some of the velocity- and conveying-related terms that you should know to effectively manage your pneumatic conveying system.
Material velocity, vacuum level, and phase flow all become important when evaluating and choosing a vacuum conveyor system for fragile bulk solids.
Wear can be a problem in any pneumatic conveying system, especially when conveying abrasive materials or operating at high velocities. This article discusses ways you can limit elbow and other fitting wear in your system.