Case Studies
Environmental Health & Safety
A methodical approach to construction and commissioning
A start-up is only as easy as the preceding steps: construction and commissioning, says Senior Editor Dirk Willard in his monthly column.
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Dissolved Air Flotation (DAF) Optimization
In industrial processing plants, a DAF is often used to reduce loadings and clarify wastewater. Tiny air bubbles are released into the tank causing small particulates to float to the top where they are skimmed off. To remove larger suspended solids, coagulant is dosed into the feed water-this helps to speed up clumping and settling. Typically, chemical is dosed to the DAF based on flow rate, but dosing based on flow ignores one major factor-the solids concentration! This leads to under and overdosing which could waste chemicals, increase hauling costs, and result in fines. Overcome this challenge by monitoring solids concentration in real-time and adjusting chemical feed based on the needs of the system.
Watch NowFeeding, dispensing and dosing
Controlling Crystallization through Modeling
CFD modeling and particle population control are key to improving processes and product quality at the crystallizer, and further downstream.
Click HereFluid Handling
Succeed at system migration
Learn to avoid the common pitfalls that each migration option poses. Here are 10 basic migration techniques.
Click HereAre you certain about uncertainties?
Dr. Gooddata, therefore, recommends that we largely abandon the term bias. Instead, we will use the terms systematic error and systematic uncertainty. Systematic error is the actual error that exists between a measurement and the true value with zero random errors. Systematic uncertainty is taken to mean the estimate of the systematic errors limits that we could expect with some confidence.
Click HereHeat Transfer
Separations in flux
Separation processes often account for more than 50 percent of a chemical company's operating costs. Read how membranes and other non-thermal technologies poised to win a wider role.
Click HereEffect of noncondensable gases on flow boiling
The presence of noncondensable gases in boiling fluids is not uncommon and sometimes can benefit the performance of the process.
Click HereOperations Management
Reviewing the use of fouling factors in heat exchanger design
HTRI plans to review and analyze specific exchanger services to develop design margins for use in sizing heat exchangersrather than relying on fouling factors.
Click HereSeparations Technology
Bend Pressure Drop & Heat Transfer Performance
The presence of bends and properly predicting pressure drop through them can have a significant impact on accurately estimating the thermal and hydraulic performance of the overall unit.
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