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Tank Blanketing Basics Covered
Nov 08 2010 01:40 PM |
proinwv
in Safety and Pressure Relief
Tank blanketing, or padding, refers to applying a cover of gas over the surface of a stores commodity; usually a liquid. Its purpose is either to protect or contain the stored product or prevent it from harming personnel, equipment, or the environment....
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tank, blanket, blanketing, basics
Centrifugal Pumps: Basic Concepts of Operation,...
Nov 08 2010 11:30 AM |
Mukesh Sahdev
in Fluid Flow
The operating manual of any centrifugal pump often starts with a general statement, "Your centrifugal pump will give you completely trouble free and satisfactory service only on the condition that it is installed and operated with due care and is prope...
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Centrifugal Pumps: Understanding Cavitation
Nov 08 2010 01:30 PM |
Mukesh Sahdev
in Fluid Flow
Operating a pump under the condition of cavitation for even a short period of time can have damaging consequences for both the equipment and the process. Operating a pump at low flow conditions for an extended duration may also have damaging consequenc...
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Understanding Compressible Flow
Nov 08 2010 01:40 PM |
rxnarang
in Fluid Flow
Understanding the flow of compressible fluids in pipes is necessary for a robust design of process plants. The main difference between incompressible fluid, like water, and compressible fluid, vapor, is the greater change in pressure and density. This...
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compressible, flow, understanding
Forms of Corrosion
Nov 08 2010 01:20 PM |
Chris Haslego
in Maintenance and Repair
Corrosion is costly! If you doubt this, then you probably have never been bitten by the "corrosion bug". Imagine specifying Titanium for 10 brand new heat exchangers or reactors and later realizing that the processing stream has fairly high concentra...
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Crystallization
Nov 08 2010 01:30 PM |
Chris Haslego
in Separation Technology
Crystallization refers to the formation of solid crystals from a homogeneous solution. It is essentially a solid-liquid separation technique and a very important one at that. Crystals are grown in many shapes, which are dependent upon downstream proc...
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Cooling Towers: Design and Operation Considerat...
Nov 08 2010 12:50 PM |
Chris Haslego
in Heat Transfer
Cooling towers are a very important part of many chemical plants. They represent a relatively inexpensive and dependable means of removing low grade heat from cooling water.The make-up water source is used to replenish water lost to evaporation. Hot wa...
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Design Considerations for Shell and Tube Heat E...
Nov 08 2010 01:30 PM |
Chris Haslego
in Heat Transfer
When preparing to design a heat exchanger, do you ever wonder where to start? You've done it before, but you hate that feeling of getting half way through the design and realizing that you forgot to consider one important element.The thought process i...
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Developing a New Drug
Nov 08 2010 01:30 PM |
Chris Haslego
in Other Topics
The purpose of this article is to look at how drugs are developed today in the modern world and how the chemical engineer is instrumental in the development of new drugs. Let's first take a look at how the development of a new drug begins. It is in...
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Extractive Distillation: An In-Depth Look
Nov 08 2010 01:40 PM |
Chris Haslego
in Separation Technology
Distillation is the most widely used separation technique in the chemical and petroleum industry. However, not all liquid mixture are amenable to ordinary fractional distillation. When the components of the system have low relative volatilities (1.00...
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extractive, distillation
Keeping Ejectors Online
Nov 08 2010 01:30 PM |
Chris Haslego
in Utilities
Steam jet ejectors offer a simple, reliable means of producing vacuum, and have a low installed cost as well. They are commonly found in process plants having available steam. The vacuum produced is useful for many processes, including evaporation, coo...
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Using Equivalent Lengths of Valves and Fittings
Nov 08 2010 01:20 PM |
pleckner
in Fluid Flow
One of the most basic calculations performed by any process engineer, whether in design or in the plant, is line sizing and pipeline pressure loss. Typically known are the flow rate, temperature and corresponding viscosity and specific gravity of the f...
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Estimating Heat Capacities for Solutions with D...
Nov 08 2010 01:40 PM |
Chris Haslego
in Calculations and Tips
Often times it is necessary to find the heat capacity for solutions with dissolved solids. A quick estimation method was proposed by Dimoplon in 1972. The proposed expression is:Cp(soln) = W1 Cp(solid) + W2 Cp(water)Eq. (1)where:Cp(soln) = Heat capacit...
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Falling Film Evaporators in the Food Industry
Nov 08 2010 01:40 PM |
Chris Haslego
in Heat Transfer
That orange juice that you had this morning sure tasted good didn't it? Did you ever wonder how they get it concentrated into that little can? Chances are the manufacturers used a falling film evaporator. Falling film evaporators are especially p...
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falling, film, evaporators, food and 1 more...
Experienced Based Rules of Chemical Engineering
Nov 08 2010 01:00 PM |
Chris Haslego
in Calculations and Tips
Experience is typically what turns a good engineer into a great engineer. An engineer that can look at a pipe and a flowmeter and guess the pressure drop within 5%. Someone who can at least estimate the size of a vessel without doing any calculations....
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Optimize Liquid-Liquid Extraction
Nov 08 2010 12:40 PM |
Madhavan
in Separation Technology
Liquid-Liquid extractors are often a neglected part of process plants because they are not well understood and generally form only a small part of the overall process scheme. Often, significant savings in operating costs can be achieved by fine-tuning...
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Fume Control and Scrubbing on Hydrochloric Acid...
Nov 08 2010 01:20 PM |
Chris Haslego
in Process and Reactions
New standards for hydrochloric acid emissions are expected to be proposed by the EPA soon, and these will affect the design of scrubbers for pickle line fume exhaust systems. This paper discusses hydrochloric acid fume scrubbing, with particular refere...
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Basics of Industrial Heat Transfer
Nov 08 2010 01:30 PM |
Chris Haslego
in Heat Transfer
Heat transfer is one of the most important industrial processes. Throughout any industrial facility, heat must be added, removed, or moved from one process stream to another. Understanding the basics of the heart of this operation is key to any enginee...
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Flow Through Orifice Plates in Compressible Flu...
Nov 08 2010 01:40 PM |
dkirk
in Safety and Pressure Relief
The calculation of compressible flow through orifice plates at high dP (critical flow) appears to be carried out incorrectly in most instances. This flow condition is often encountered on gas plants, compressor stations and pipelines where orifice plat...
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high, pressure, orifice, flow and 2 more...
Hollow Fiber Membranes
Nov 08 2010 01:20 PM |
Chris Haslego
in Separation Technology
Membrane separation processes has become one of the emerging technology which undergo a rapid growth during the past few decades. It has drawn the world attention especially in the separation technology field, one of the chemical engineers' specialty w...
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Basics of Injection Molding
Nov 08 2010 01:30 PM |
Chris Haslego
in Bulk Solids
Making polymers is a fantastic science.  Then there is the matter of shaping the plastic into useful objects....another fantastic science. One of the most common methods of shaping plastic resins is a process called injection molding. Injection m...
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Solving Integral Equations in MS Excel
Nov 08 2010 01:10 PM |
Steve Hall
in Calculations and Tips
TankVolume, as it appears in the online store, calculates the liquid volume of partially filled tanks, horizontal or vertical, with various types of heads. One of these, the torispherical head, requires that integral equations be solved. This artic...
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Heat Exchanger Effectiveness
Nov 08 2010 01:40 PM |
Chris Haslego
in Heat Transfer
Calculating heat exchanger effectiveness allows engineers to predict how a given heat exchanger will perform a new job. Essentially, it helps engineers predict the stream outlet temperatures without a trial-and-error solution that would otherwise be ne...
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heat, exchanger, effectiveness and 2 more...
What is a Heat Pipe?
Nov 08 2010 01:20 PM |
Chris Haslego
in Other Topics
A heat pipe is a simple device that can quickly transfer heat from one point to another. They are often referred to as the "superconductors" of heat as they possess an extra ordinary heat transfer capacity and rate with almost no heat loss. The idea of...
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Thermodynamic and Transport Properties of Water...
Nov 08 2010 01:20 PM |
bspang
in Physical Properties
Water is not only one of the most common substances and indispensable to life, it's also one of the most important media in engineering applications. Steam engines with water as the working fluid were at the beginning of the industrial revolution. The...
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