Read e-book online Advanced pH Measurement and Control PDF

By Gregory K. McMillan

ISBN-10: 1934394432

ISBN-13: 9781934394434

This best-selling publication presents a transparent, concise, and entire view of ways to pick, set up, and retain electrodes, keep an eye on valves, and regulate ideas for pH functions severe for product and water caliber within the procedure undefined. The ebook covers each point of process layout together with the blending and reagent piping standards which are very important for a profitable application.
The crucial recommendations are summarized as key insights and the easiest practices are offered as ideas of thumb through the ebook. The rising power of dynamic on-line pH estimators is explored to make latest pH measurements speedier and extra trustworthy. the newest advancements in complex batch keep an eye on, adaptive keep watch over, linear reagent call for regulate, and version predictive keep an eye on are provided to lessen reagent intake and variability.
Этот бестселлер обеспечивает четкое, краткое, и полное представление о том, как выбрать, установить и поддерживать электроды, регулирующие клапаны и стратегию борьбы с измерением рН, решающее значение для качества продукта и воды в обрабатывающей промышленности. Книга охватывает все аспекты проектирования систем, в том числе и требования смешивания реагентов трубопроводов, которые важны для успешного применения. Важнейшие концепции можно резюмировать ключевые идеями и лучшими практиками, представленных в виде эмпирических правил на протяжении всей книги. Возникающие возможности динамического измерения рН изучены, чтобы сделать существующие измерения рН более быстрыми и надежными. Последние события в расширенный контроля, адаптивного управления, линейное управление подачи реагента и модели интеллектуального управления представлены для уменьшения расхода реагентов и изменчивости.

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Example text

Water acts as both an acid and a base because it yield s both a hydrogen ion and hydroxyl ion upon d issociation as shown in Eq ua tion 2-3c. Neu tralization is the association of the hydrogen and hyd roxyl ions to form water; it is d esignated by the reverse arrow in Equation 2-3c. Forward and reverse a rrows in these equations show that ion association as well as d issociation occurs to maintain equilibrium Copyrighted material 43 Chapter 2: The Chemistry between the concentrations of the species on both sides of the equation.

Most titrators are now automa tic with interfaces to plant data historians. If the tit ration curve has a long, flat tail, relatively few data points are needed until the fi rst bend. However, in order to estima te the valve rangeabili ty and stick-slip and the mixing eq uipment size and agitation requirements, the starting point, which represents the infl uent pH, for va rious operating cond itions must be accurately plotted. If the sample or the reagent contains solids, th e tim e required for the solids to dissolve and the ions to get into solution to establish the solution ion balance can take fro m several seconds to several minutes.

Understand Some Basic Truths of p H Measurement", Chemical Engmeertng Progress, October 1991. 8. s trumentation, Systems, and Au tomation Society, 2003. 9. ltltllt and COlltrol, Repri nt via ProQu l'St UMI Books on Demand, ISA - The Instru mentation, Systems, and Automa tion Society, 1987. Copyeiqhted material Chapter 2: The Chemistry Copyrighted material Chapter 2 The Chemistry 2-1. Nearly Normal More than any other field , successful pH ap p lications require good communica tion between the chemist, specialist, and p lan t engineer.

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Advanced pH Measurement and Control by Gregory K. McMillan


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