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Ankur's_Chemical_Engg_Blog



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Natural Gas Teg Dehydration Unit Troubleshooting

Posted by ankur2061 , in Technical 22 January 2016 - * * * * * · 12,657 views
natural, gas, teg, dehydration and 1 more...
Dear All,

Today's blog entry is dedicated to my dear departed father who passed away to his heavenly abode on January 05, 2016. He was a man of literature and whatever little writing skills I possess, it was he who inspired and encouraged me. I guess, I inherited a bit of writing skills from both of my parents, my father being a poet and short-story writ...



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Heat Transfer In Buried Liquid Pipelines

Posted by ankur2061 , in Technical 14 December 2015 - * * * * * · 21,767 views
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Heat Transfer In Buried Liquid Pipelines Dear All,

Today's blog entry relates to heat transfer from liquids flowing in long-distance buried pipelines. When liquids have to be transported at relatively high temperatures, e.g. viscous crudes/products, temperatures and cooling rates can be determined using the following formulae:



where:
TL = average temperature in cross-section of pipeline at...



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Deoiling Hydrocyclones And Their Performance Prediction

Posted by ankur2061 , in Technical 12 November 2015 - * * * * * · 12,760 views
hydrocyclones, deoiling and 2 more...
Deoiling Hydrocyclones And Their Performance Prediction Dear All,

Today's blog entry relates to liquid-liquid hydrocyclones used in produced water treatment in the oil & gas industry.

The static hydrocyclone has rapidly been accepted as a compact and efficient means of removing dispersed hydrocarbons from water. The basic design of the static hydrocyclone is illustrated schematically in the figure below:...



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Generalized Equation For Crude Oil Working Storage In Refinery Based On Various Factors

Posted by ankur2061 , in Technical 11 October 2015 - * * * * * · 8,107 views
crude, oil, working, storage and 1 more...
Generalized Equation For Crude Oil Working Storage In Refinery Based On Various Factors Dear All,

Refinery storage of raw materials (mainly crude oil) and finished products is a complex study and involves concepts of linear programming and Monte Carlo simulation. Refer the links below to know about these in context of raw material and product storage:

http://egon.cheme.cm...mannWassick.pdf

http://informs-si...



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Distance Between Mist Eliminator Top And Vapor Outlet Nozzle For Vertical Separators

Posted by ankur2061 , in Technical 04 September 2015 - - - - - - · 12,239 views
distance, mist, eliminator, top and 2 more...
Dear All,

Besides defining the Low-Low (LLL), Low (LL), Normal (NLL), High (HLL) and High-High (HHLL) liquid level based on criteria such as retention time, surge requirements for normal process control and adequate disengagement space during events such as large liquid slugs entering the separator or foaming, it is also important to define the vapor out...



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Pressure Drop In Fixed (Single Phase Tubular Packed) Bed Reactors

Posted by ankur2061 , in Technical, Uncategorized 29 July 2015 - * * * * * · 15,345 views
pressure, drop, fixed, bed and 1 more...
Pressure Drop In Fixed (Single Phase Tubular Packed) Bed Reactors Dear All,

Today's blog entry relates to pressure drop in fixed bed reactors.

Let us examine the components that contribute to the calculated pressure drop in fixed bed reactors. The design pressure drop should consider a safety margin on the calculated pressure drop.

Bed Pressure Drop : For both gases and liquids this should be calculated based on the...



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Zeolite Based Molecular Sieve Adsorbents In The Chemical Process Industry

Posted by ankur2061 , in Technical 19 June 2015 - * * * * * · 11,488 views
zeolite, molecular, mol, sieve and 1 more...
Zeolite Based Molecular Sieve Adsorbents In The Chemical Process Industry Dear All,

Today's blog entry gives a brief overview of zeolite-based molecular sieves for physical adorption operations in the chemical process industry.

Since the 1960s, molecular sieve adsorbents have become firmly established as a means of performing difficult separations, including gases from gases, liquids from liquids and solutes from solutions. T...



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Skid Mounted Modular Mini Crude Refining Units

Posted by ankur2061 , in Technical 28 May 2015 - - - - - - · 10,534 views
skid, mounted, modular, refinery and 2 more...
Skid Mounted Modular Mini Crude Refining Units Dear All,

In remote crude oil drilling locations or where some value addition on the crude is required such as production of low cetane diesel (generally less than 40) and straight run naphtha with low first investment costs, skid mounted modular mini refining crude units are the answer.

Let us examine the advantages of a skid mounted modular unit:

1....



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Overall Heat Transfer Coefficient For Tank Heaters (Steam) Heating Hfo / Asphalt

Posted by ankur2061 , in Technical 29 April 2015 - * * * * * · 14,090 views
tank, heating, overall, heat and 3 more...
Overall Heat Transfer Coefficient For Tank Heaters (Steam) Heating Hfo / Asphalt Dear All,

Today's blog entry provides an equation for Overall Heat Transfer Coefficient for storage tanks handling Heavy Fuel Oil (HFO) / Asphalt and provided with tank heating coils using steam as a heating medium.

If the heat loss rate Q (W or Btu/hr), from the tank is known, then the steam coil surface area can be calculated and thus the coil geometr...



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Safety Integrity Level (Sil) Definition And Brief Explanation

Posted by ankur2061 , in Management 29 March 2015 - - - - - - · 12,580 views

Dear All,

Most young process engineers have heard the term SIL but not got involved in what SIL is all about. In fact, there is a misconception among many younger process engineers that SIL is solely related to the advanced "Control & Automation" part of a process plant and process engineers need not get involved in a detailed SIL study or SIL review...



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Nit Warangal, Department Of Chemical Engineering Golden Jubilee Celebrations

Posted by ankur2061 , in For Students and Young Engineers 15 March 2015 - * * * * * · 6,338 views

Dear All,

It is heartening to note that the contribution of "Cheresources" to the global chemical engineering community is being recognized all over including academic institutions.

National Institute of Technology (NIT), Warangal, is one of the premier engineering institutes of India providing bachelors, masters and doctoral degrees in the field of eng...



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Requirement Of Adequate Ventilation In Process Areas

Posted by ankur2061 , in Technical 18 February 2015 - - - - - - · 14,020 views
ventilation, process
Requirement Of Adequate Ventilation In Process Areas Dear All,

Process Engineers normally are not directly involved in Heating, Ventilation, Airconditioning (HVAC) requirements of a Chemical Process Plant. HVAC engineering is a specialized branch of engineering and HVAC engineers normally involve themselves in system design for a chemical process plant. However, adequate ventilation is a matter of concern...



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Don't Be An Engineer At The Expense Of Common Sense

Posted by ankur2061 , in Management 04 January 2015 - * * * * * · 8,337 views
management, engineer, common and 1 more...
Don't Be An Engineer At The Expense Of Common Sense Dear All,

Happy New Year to all of you and I start off with a blog entry which you may find quite interesting.

Being an engineer is justifiably a matter of pride since engineers have made an immeasurable contribution to the betterment of the world we live in.

However, as Homo sapiens, who are the considered on the top of the chain of living beings we m...



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Guidance Notes On Buried Piping

Posted by ankur2061 , in Technical 15 December 2014 - * * * * * · 12,586 views
buried, pipes, guidance
Guidance Notes On Buried Piping Dear All,

Most process engineers should try to understand basic concepts of piping installation along with routine process design calculations related to piping such as pressure drop, velocity and erosion / corrosion limits for various pipe metallurgies.

Today's blog entry provides some guidance on buried or underground pipe installation.

Piping should...



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Determining Diesel Transfer Pump Capacity For Diesel Engines And Generators

Posted by ankur2061 , in Technical 08 November 2014 - - - - - - · 9,850 views
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Determining Diesel Transfer Pump Capacity For Diesel Engines And Generators Dear All,

Often process engineers are asked to design a diesel storage and transfer system for diesel engines and diesel power generators. Where to start is often a question among process engineers. There has to be a design basis for designing such a system. Today's blog entry addresses the design basis for design of a diesel storage and transfer system...



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Selection And Sizing Of Marine Loading Arms For Petroleum (Black / White Oil) Products

Posted by ankur2061 , in Technical 04 October 2014 - - - - - - · 20,555 views
sizing, selection, marine and 2 more...
Selection And Sizing Of Marine Loading Arms For Petroleum (Black / White Oil) Products Dear All,

Todya's blog entry provides a procedure for selection / sizing of marine loading arms

Vessel / Tanker Design Discharge Capacity (Figure 1)



Oil Tanker Manifold Diameters



Loading Arm size should not be larger than a maximum of two sizes of the the ships manifold diameter. A smaller size loading arm compared to the ship's manifold diam...



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Flare Dispersion Analysis - Frequently Asked Questions (Faqs)

Posted by ankur2061 , in Technical 08 September 2014 - * * * * * · 18,763 views
flare, dispersion, questions
Flare Dispersion Analysis - Frequently Asked Questions (Faqs) Q1. What is Flare Dispersion Analysis?
A1. Flare dispersion analysis is a study of the dispersion of toxic and / or flammable pollutants (primarily gaseous) from a flare, either a ground or elevated flare.

Q2. Is it necessary to perform a flare dispersion analysis?
A2. Yes, it has now become mandatory in most parts of the world when a new industrial u...



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Some Guidelines For Fixed Bed Ion Exchange Units And Forced Draft Degasifiers

Posted by ankur2061 , in Technical 11 August 2014 - - - - - - · 7,484 views
fixed, bed, ion, exchange, forced and 2 more...
Some Guidelines For Fixed Bed Ion Exchange Units And Forced Draft Degasifiers Dear All,

Boiler feedwater is often obtained from raw water by ion-exchange process utilizing vertical cylindrical vessels which contain ion-exchange resins of various types. These resins remove dissolved salts from the water and replace them with Hydrogen (H+ ) and hydroxyl (OH- ) thus producing pure, mineral free boiler feed quality water.

Resins whic...



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Dielectric Constant Data Required For Guided Wave Radar Type Level Transmitters

Posted by ankur2061 , in Technical 22 July 2014 - * * * * * · 16,548 views
dielectric, data, guided, wave and 4 more...
Dielectric Constant Data Required For Guided Wave Radar Type Level Transmitters Dear All,

One of the most important data required for specifying guided wave radar level transmitters for storage tanks is the Dielectric constant of the stored liquid in the tank.

This data is provided by process engineers. A lot of this data is available directly form various open sources form the internet. Some links are provided below:

http://www.e...



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Rotary Screw Compressors - Discussion And Calculations

Posted by ankur2061 , in Technical 03 July 2014 - * * * * - · 20,183 views
rotary, screw, compressor and 1 more...
Rotary Screw Compressors - Discussion And Calculations Dear All,
Rotary Screw compressors are fast replacing piston type reciprocating compressors all over the world. With advancement in technology of precision machining the helical screws required in screw compressors, they are becoming the first choice for selection where otherwise a piston reciprocating compressor would have been used in earlier days....



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