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Killing Insects Naturally
Nov 08 2010 01:20 PM |
Chris Haslego
in Archived Articles
Archived article in PDF format This is a legacy article shown in Adobe Acrobat format embedded into the page below. If you cannot see the article below, please download Acrobat Reader.
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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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Jacketed Vessel Design
Nov 08 2010 01:20 PM |
Guest
in Heat Transfer
Jacketing a process vessel provided excellent heat transfer in terms of efficiency, control and product quality. All liquids can be used as well as steam and other high temperature vapor circulation. The temperature and velocity of the heat transfer me...
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ISO 9000 Standards
Nov 08 2010 01:20 PM |
Chris Haslego
in Archived Articles
Archived article in PDF formatThis is a legacy article shown in Adobe Acrobat format embedded into the page below. If you cannot see the article below, please download Acrobat Reader.
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Interfaces and Colliods: The Twilight Zone
Nov 08 2010 01:20 PM |
Chris Haslego
in Archived Articles
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Interfaces and Colliods: Some General Concepts...
Nov 08 2010 01:20 PM |
Chris Haslego
in Archived Articles
Archived article in PDF formatThis is a legacy article shown in Adobe Acrobat format embedded into the page below. If you cannot see the article below, please download Acrobat Reader.
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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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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...
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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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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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...
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...
Factors Affecting the Quality of Quicklime
Nov 08 2010 01:30 PM |
Chris Haslego
in Archived Articles
Archived article in PDF format This is a legacy article shown in Adobe Acrobat format embedded into the page below. If you cannot see the article below, please download Acrobat Reader.
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quicklime, factors, quality
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
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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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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Energy Conservation in Distillation
Dec 13 2010 09:23 AM |
Chris Haslego
in Separation Technology
The preferred method of separation in the chemical industry, distillation, is a very energy intensive process. Fine tuning your distillation columns (and in some cases, making major changes) can save your company thousands of dollars a year or more. Co...
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Distillation Pilot Plant Design, Operating Para...
Dec 13 2010 11:53 AM |
Chris Haslego
in Separation Technology
In spite of the fact that tremendous progress is being made in understanding the performance of both random and structured packings in distillation, it is a long way from being able to predict from first principles, the efficiency, capacity and pressur...
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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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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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Deaerators for Boilers
May 22 2012 09:54 AM |
Chris Haslego
in Utilities
Removing dissolved oxygen from boiler feed water is absolutely necessary to protect your boiler equipment from severe corrosion. But the make-up water necessary in any boiler system inevitably contains dissolved oxygen. Oxygen can sometimes enter condensate systems as well. A good deaerator is essential to trouble-free boiler operation.
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Dangers in Organic Nitro Compound Reactions
Nov 08 2010 01:20 PM |
Chris Haslego
in Archived Articles
Archived article in PDF format This is a legacy article shown in Adobe Acrobat format embedded into the page below. If you cannot see the article below, please download Acrobat Reader.
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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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Correlations for Convective Heat Transfer
Nov 08 2010 01:20 PM |
bspang
in Heat Transfer
In many cases it's convenient to have simple equations for estimation of heat transfer coefficients. Below is a collection of recommended correlations for single-phase convective flow in different geometries as well as a few equations for heat transfer...
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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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