Issues Arise from Boiler Feed Water

By Newgram

Total Dissolved Solids

The most important indication in boiler water that has to be understood is  TDS, Total Dissolved Solids. Total dissolved solids (TDS) is a measure of the combined content of all inorganic and organic substances contained in a liquid in the fresh water system. TDS is a reading used to measure the amount of inorganic salts dissolved in water that hydrolyzed into ions. Result of TDS is often used to determine the frequency of the blow down of the boiler.

The required test results for the analysis includes boiler feed water, boiler water and the condensate.

For steam boiler up to 20 barg of saturated steam.

The maximum allowable value for TDS in boiler water should be maintained below 2500 mg/l

The maximum allowable in boiler feed water for Total Hardness (TH) should not exceed 1 mg/l.

*Ref = Reference with

TH should be monitored continuously and the actual reading of the result to be trended in real time.

High TDS results to scaling and increases the viscosity of boiler water which causes carry-over of solids with the steam, resulting to the reduction in the quality of steam and leading to potential damage of the boiler equipment and system.

Impurities in boiler feed water and resulting impacts checklist

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Information provided in this article are provided “as is” without warranty of any kind, either express or implied, including without limitation warranties of merchantability, fitness for a particular purpose and non-infringement. The author provides, with reasonable effort, accurate and up-to-date information in this article. It does not, however, make any warranties or representations as to its accuracy or completeness. It periodically adds, changes, improves or updates the information and documents in this article without notice. The author assumes no liability or responsibility for any errors or omissions in the content of its article. You are using the article at your own risk. Under no circumstances shall the author or any other party involved in creating, producing or delivering the contents of this article be liable to you or any other person for any direct, indirect, special, incidental or consequential damages arising from your access to, or use of, this article.

 

Basic Knowledge of Pumps Selection and Pump Alignment

by Newgram

Introduction

A pump is an equipment commonly used in industrial and commercial building to transfer fluid such as gas, liquid and/or slurries from one location to another by conversion of energy from electrical, fossil fuel (gasoline, diesel), air or other form to mechanical energy (kinetic and potential). The function of a pump is to elevate the fluid to a higher level (in most cases), provide pressure for some application (sprinkler, lifting device and washing device) and overcome frictional losses during conveyance.

The history and first invention of pump can be traced back to Egyptian in  2,000BC when water was raised using a long suspended rod with a bucket at one end and counter weight at the other. The pump we used today was improvise by Archimedes (ancient Greek physicist and mathematician) and is considered one of the greatest inventions of all time known as Archimedes screw that could raise water from river so that it can be used for irrigation.

Types of Pumps

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Installation Guidance for Boiler Safety Relief Valves

by Newgram

Considerations when sizing of relief valves for boiler system

    • 2 or more safety relief valves should be provided on boiler/s with heating surface greater than 50 m2 (500 ft2); otherwise comply with local regulation or adhered to international guideline/standard whichever more stringent.
    • Safety relief valves should be sized to operate up to >6% of the maximum allowable working pressure for high pressure boiler.
    • Isolation valve should not be installed on the relief valves.

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