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Konstantin Bespalov
Konstantin Bespalov

Pneumatic Conveying Of Solids: A Theoretical An...

Pneumatic conveying is one of the most popular methods of handling bulk powdered and granular materials in mining, chemical and agricultural industries. This 3rd edition of this successful book covers both theoretical and practical aspects of the subject. It is unique in its blending of academic materials and good industrial design techniques. Each topic is covered in depth, with emphasis placed on the latest techniques, hardware systems and design and research methodology. Its comprehensive worked examples and table ensure that the reader need not consult any other reference material. In this 3rd edition new sections on simulation and modelling have been added, while the use of tomography as a tool for monitoring pneumatic conveying is also covered.

Pneumatic Conveying of Solids: A theoretical an...

"Excellent book, more for theoretical approach of the pneumatic conveying problems and questions. A good presentation for most of the pneumatic conveying components, but it does not enter the real problem of sizing a pneumatic conveying system." (by Vassilis Tsalicoglou)

This course provides a deep dive into specifying, designing, and sizing a pneumatic conveying system. It involves a combination of theory, calculations, and practical hands-on application. Participants are encouraged to bring their specific questions and issues for discussion.

Students will participate in an immersive course combining lecture and hands on exploration in the full scale lab at the Bulk Solids Innovation Center. Taught by industry veterans and university research experts, this course is intended for those that are looking to take their knowledge of pneumatic conveying to the next level.

This course is recommended for those that have a basic understanding of pneumatic conveying or those who have attended our Basics of Pneumatic Conveying course. Those employed in engineering, operations, maintenance, and management will find particular relevance.

Vice President at Jenike & Johanson Inc., a world-renowned engineering consulting firm specializing in the storage, flow and processing of powder and bulk solids. He has been involved in many projects related to flow properties testing, modeling, blending, pneumatic conveying and fluidization.Read more

To improve the flexibility of the pneumatic conveying system, a bend is usually regarded as an important component in the process route. However, a bend makes the flow situation complicated and causes a sharp pressure loss. Especially in engineering, pressure loss is typically used as a key parameter to guide and design pneumatic conveying systems. Hence, to reasonably estimate the local pressure loss through a bend is very significant for pneumatic conveying systems.

Considering the universality of the 90 bend of a circular cross section, it has been applied and studied by numerous researchers. Cornish and Charity [1] listed all the important parameters (e.g., gas density and viscosity, particle density and size, bend curvature radius and diameter, the conveying velocity, and mass flow rate) of the local pressure loss at a 90 bend for a given pneumatic conveying system and found that the local pressure loss is higher for a short bend curvature radius and linearly increases with the increasing solid-gas ratio (i.e., the mass flow rate of solids to gas). Ghosh and Kalyanaraman [2] studied the local pressure loss in dilute-phase (solid-gas ratio

In this study, based on a low-pressure dilute-phase pneumatic conveying system, the influences of local pressure loss arising from the change of superficial conveying gas velocity, particle mass flow rate, and bending radius ratio are investigated in a horizontal-vertical 90 bend. Meanwhile, to provide theoretical support for designing the low-pressure dilute-phase pneumatic conveying systems as conveying the coarse particles, an empirical formula of the local pressure loss is derived using dimensional and nonlinear regression analysis.

To accurately estimate the local pressure loss in low-pressure dilute-phase pneumatic conveying of coarse particles, in this study, the influences arising from different superficial conveying velocities, particles mass flow rates, and bending radius ratios are investigated in a horizontal-vertical 90 bend. Considering the gravity pressure loss, the empirical formula of the local pressure loss is derived using dimensional and nonlinear regression analysis. The significant conclusions are as follows:(1)In the experiment, the local pressure loss of gas flow increases with increasing conveying velocity and bend curvature radius(2)For the short straight pipe, a long radius bend causes the large local pressure loss at lower conveying velocity and low local pressure loss at higher conveying velocity for gas-solid flow(3)Synthesized from the present work and previous researches, the local gas flow pressure loss coefficient decreases with increasing Reynolds number, first decreases and then increases with the increasing bending radius ratio from 0.5 to 7(4)The additional pressure loss coefficient of solid flow decreases with the increasing Reynolds number and bending radius ratio and increases in proportion with the increasing gas-solid ratio(5)From the comparison of the estimated local pressure loss values with experimental values in a horizontal-vertical 90 bend, the relative deviation is 10% and the calculated standard deviation is below 4.11%

The two types of pneumatic conveyors are the dense phase and dilute phase. In dense phase pneumatic conveying the particle concentration is very high, as shown in the left picture. Dilute phase pneumatic conveying, shown on the right, has a small solid concentration

In dense phase pneumatic conveying, the material is first placed in a hopper. The hopper feeds the material into a dense phase transmitter, which mixes the feed with a gas, usually air. The material travels by plug flow to its destination.

The pictures below exemplify a pneumatic conveying system used to transport metal chips for processing. The upper picture shows the inlet receiving hopper and pick-up pneumatic piping. The lower picture shows the overhead pneumatic transfer system from the pickup lines to the main pneumatic line.

Particle velocity is an important characteristic parameter in the process of evaluating dense-phase pneumatic conveying system. It relates to the properties of conveying materiel, system performance, operating conditions, physical properties of conveying gas etc, and has some noticeable effect on the conveying capacity, energy consumption, wear between particles and pipe. Of all influencing factors, characterization of powder is crucial to impact particle velocity. In this paper, pneumatic conveying experiments of four kinds of powdery material whose different solid physical properties are tested and taken are carried out using compress air in long distance pipe. The trend of particle velocity was achieved by the experimental data gained from Groups of differential pressure transmitters. Dimension analysis and mathematical analysis were adopted to obtain a theoretical correlation equation of particle velocity versus solid characteristics:And this equation can be used to predict the tendency of particle velocity for different kind of solid precisely. 041b061a72


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