Pneumatic transport system

Praii, T. H., Static Electricity in Pneumatic Transport Systems, Process Safety Progress, V. 13, No. 3, 1994, p. 109. 

Wypych, P. W., Optimising Uprating Pneumatic Transport Systems, Vat. Conf on Bulk Materials Handling, Yeppoon, Qld., IEAust. Proc., pp. 197-203... 

The probability of the formation of polymer agglomerates is appreciably increased by electrostatic interactions. This phenomenon is, inter alia, also known in the handling of polymer powders. Owing to the fact that the polymer particles are not electrically conductive, electrostatic charging occurs in pneumatic transport systems in an... 

D.J. Mason, J. Li, P. Marjanovic, Numerical simulation of solids feeding in a gas-solids pneumatic transport system, Proceedings of the 3rd Israel Conference for Conveying and Handling of Particulate Solids, vol. 2, The Dead Sea, Israel, May 2000, pp. 10.93-10.101. 

T. Ramakrishnan, K. Ramakoteswara Rao, M.A. Parameswaran, S. Sivakumar, Experimental investigation of a dense-phase pneumatic transport system, Chem. Eng. Process. 32 (1993) 141-147. 

The mechanisms of a single particle-wall collision are given in Chapter 2. A particle-wall collision in pneumatic transport systems is a complex process. The bouncing characteristics depend on many parameters, including impact angle, translational and rotational velocities of the particle before collision, physical properties of the wall and particles, and wall roughness and particle shape. 

Fast pneumatic transport systems are needed for the investigation of short-lived radionuclides. They can be operated over distances of several metres and the samples can be brought, within 0.1 to 1 s, directly from the place of irradiation to the counter. 

Pneumatic Transport System Nadustco Fan Cyclone Purchased/ NCRR built 10,000 ACFM fan - 60 hp positive pressure - 14" sq. duct... 

The data applies to all wood particles, but only individual fibres are able to respond in the brief time the material is in a pneumatic transport system. 

There are two approaches to transporting material prepared for the press line. Belt conveyors are used for higher density materials, but the mat becomes very bulky when densities fall. For fibres, pneumatic transport systems, where the fibre is carried by a moving stream of air, are used although belt conveyors are used for the moving floor of the fibre bin or bunker and for the conveyors that carry the MDF mat from the former to the press. 

France) 1, pneumatic transport system 2, storage silos 3, reversible horizontal belt conveyor 4, dumpster 5, elevators 6, day bins 7, roller presses 8, rotating shears 9, product collection carts... 

A similar approach was adopted by Mason et al. [13] and Bradley et al. [15] for estimating the pressure drop caused by bends in the pneumatic transport system. 

The interphase momentum transfer term can be derived from correlation developed to model fluidization processes since the range of solids concentrations experienced in pneumatic transport systems is similar. This form has been employed by Patel and Cross [46] for modeling gas-solids fluidized beds. For solid concentrations greater than 0.2, the interphase friction coefficient, K, may be computed by using the Ergun [47] equation ... 

A calcine storage silo to store calcine with capacity for 6,500 tonne will be constructed, along with wet and pneumatic transport systems from the silos to the leaching plant for the calcine. 

O Figure 30.4 illustrates a Cr, Au, and Mo pellet ready for irradiation next to a sample of ceramic material. They are irradiated in a polyethylene irradiation vial using a pneumatic transport system and 5 days after irradiation, the Cr, Au, Mo pellet is counted to measure the... 

There is a greater tendency for particles to salt out in a horizontal pipe which is preceded by a downflowing vertical to horizontal bend than in any other configuration. If this type of bend is present in a system, it is possible for solids to remain on the bottom of the pipe for very long distances following the bend before they redisperse. Therefore, it is recommended that downflowing vertical to horizontal bends be avoided if at all possible in dilute phase pneumatic transport systems. 

Design a positive pressure dilute-phase pneumatic transport system to transport 900 kg/h of sand of particle density 2500 kg/m and mean particle size 100 gm between two points in a plant separated by 10 m vertical distance and 30 m horizontal distance using ambient air. Assume that six 90° bends are required and that the allowable pressure loss is 0.55 bar. 

In a dilute phase pneumatic transport system, what are the two main reasons for using a rotary airlock ... 

In a dense phase pneumatic transport system, why is it necessary to limit plug length in some cases Describe three ways in which the plug length might be limited in practice ... 

In order to increase the inadequate capacity of a pneumatic transport system, a number of actions can be taken. For example, consider modifying the air supply quantity ... 

Boshung and Glor (1980) showed that the particle size and the material are the two most important parameters associated with charging in pneumatic transport systems. 

The first application of the dispersion enhancer as a de-dusting system was undertaken for a local company manufacturing polyethene pellets. The pellets were transported after manufacture in a dilute phase pneumatic transport system, which caused them to produce... 

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