Abstract
In this chapter a very broad range of possible operating problems are considered that are very specific to particular types of system and to common system components. These include the use of backup filters, the problem of air ingress and air loss in systems, and the control of feed rate. Positive- and negative-pressure systems, combined systems, and single-plug systems are all included in the analysis. Blowers, blow tanks, rotary valves, filters, and vacuum nozzles are all identified as system components that need particular consideration. Specific problems that tend to be overlooked are also included, such as the influence of altitude, gradual plant wear, pipeline purging, and temperature variations with regard to both conveyed material and conveying air. Seasonal variations resulting from changes in both humidity and temperature are also considered. By way of introduction to the chapters that follow, specific problems relating to component wear, degradation of conveyed materials, and the possibilities of an explosion are also considered.
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