HOW TO SELECT A BOILER?

When writing to the boiler manufacturers, the following information should be furnished to them:

Lowest ambient temperature likely to be reached during a year at the proposed place of operation.
Elevation of the place above MSL
Maximum working pressure
Maximum steam demands at the working pressure of the boiler.
Fuel to be used and its analysis report.
Whether the load on the boiler is likely to be steady or fluctuating and if fluctuating, then between what limits?
Analysis of the raw water to be used in the boiler after treatment.
In the case of solid fuel fired boilers, whether mechanical firing is preferred.
In the event of any proposed standardization of both the HPs & the make of electric motors that fact should be intimated.

Information the Manufacturer should be requested to furnish

Gross Efficiency of boiler
Accessories included
Quality of steam dryness fraction
Flue gas temperature
Grate area(for solid fuel fired boilers)
Expected evaporation(kg of steam at working pressure/kg of fuel)
Heating surface area
Delivery Period

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SENSIBLE HEAT & LATENT HEAT

SENSIBLE HEAT Sensible heat produces a rise or fall in temperature of substance Sensible heat does not change physical state of substance LATENT HEAT Latent heat changes the state of substance i.e. Liquid to Gas, Solid to Liquid and Liquid to Solid in case of boiler . Latent heat does not cause temperature change in the substance

Why spirals are provided at the Idustrial Boiler Chimney

Chimney:- Chimney , as we know, is used to reject the flue gases to the atmosphere, coming from the Steam Boiler during operation. Also, it is a megastructure in Steam Boiler assembly and any discrepancy in its structural and foundation work can cause extremely serious damages, may even lead to casualties or plant shut off till its re-erection. The designer must consider all the factors while designing chimneys and one of the major factors amongst them is the wind factor. Blowing wind tries to overcome its static inertia but fails, if spirals are provided on the surface of the chimney. BUT THE QUESTION IS HOW????? Consider a chimneys (without spiral wings) , when the blowing wind comes in contact with its upstream surface, stagnation point (zero velocity) is achieved at that point i.e. pressure generated is high at that point and at the downstream end a vacuum is created as the wind coming in contact with the chimneys , gets deflected and meets after some point (wake regio

Critical Thickness of Insulation and It's Effect on Boiler Efficiency

Welcome to the THERMODYNE BLOG, today in this article we are going to explore the thickness of insulation and its effect on boiler efficiency and other parameters. Critical thickness of insulation and its significance The information in this article gives a significant collection of data you need to know about the boiler and its performance, the parameter that affects the boiler efficiency . Table of content INTRODUCTION THICKNESS OF INSULATION CRITICAL RADIUS EFFECT ON BOILER EFFIIENCY INSULATING MATERIALS CONCLUSION INTRODUCTION- The thickness up to which heat flow increases and after which heat flow decreases is termed critical thickness . In the case of cylinders and spheres, it is called the critical radius . The critical radius of insulation can be derived depending on the thermal conductivity of the insulation k and the external convection heat transfer coefficient h. THICKNESS OF INSULATION- CRITICAL RADIUS- In boiler the shell and tube are cyl

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