Download Automation in the Food Industry by Tom Greeves (auth.), C. A. Moore B.Sc., C.Eng., FIEE (eds.) PDF

By Tom Greeves (auth.), C. A. Moore B.Sc., C.Eng., FIEE (eds.)

This e-book is designed to be every thing its name suggests-a functional consultant to automation in the nutrients undefined. it's the first booklet to provide sensible suggestion on what could be a such a lot bewildering topic in an the place using potent automation is of paramount value. there are numerous books facing the speculation and perform of keep an eye on structures in either the meals and different industries. even if, those are inclined to provide an excessive amount of element in either parts to be classed as overviews, or conceal an excessive amount of of the extra seen aspect and gloss over, or stay away from, the weather the place the choices are hard-even notwithstanding those are the parts that are primary to profitable and expansive initiatives. This e-book identifies these parts of any automation scheme that have to be thought of first, and that shape the rules for any winning venture. The editorial advent outlines the content material of the booklet and is an invaluable start line. Examples are used, anyplace attainable, to teach what might be performed, the way it may be accomplished, and what to prevent. A word list of definitions is integrated on the finish of the e-book. the entire chapters were written via engineers, with a long time' event during this box, who've been in a position to convey their perspectives freely. the result's a booklet which covers the major parts of the topic, utilizing at least the technical jargon with which this topic abounds, in a readable, useful manner.

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6 Variable flowrates The problem of varying the flowrate through continuous processes was mentioned in an earlier section. An example is that of a continuous plant where the slurry must first be taken through a pre heater and held at an elevated temperature in a delay tube to induce flavour development, then passed INTRODUCTION TO FOOD PROCESSING 15 through an evaporator to establish the moisture level, and finally cooled to the required temperature. If the throughput is increased the time in the delay tube is reduced, and so the preheater temperature must be increased in compensation.

Powder or granular materials are generally fed by screw feeders or similar special purpose devices. They are either treated as positive displacement devices-which in reality they are not -or the speed is modulated on the basis of the loss-in-weight from the feed container. Caking up or bridging can be an intractable problem with powders especially when they are hygroscopic. Raisins and similar soft ingredients present particularly difficult feeding problems, and these products warrant special attention.

6 Summary In the introduction the need for control engineers to appreciate the wider commercial context within which they are working was stressed. Subsequent sections attempted to characterise the major stages of the production process and to give a few examples of the many and varied processes employed at each stage. Three types of the control system requirement have been identified: the control of individual machines or process elements; the coordination of groups of machines and process elements to form an effective production line; and communication facilities to allow the coordination and scheduling of the overall production system.

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