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Nagarajacanchi
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Join Date: Mar 2011
Location: Hospet,Karnataka
Posts: 2

Differential Pressure

07/20/2011 1:07 PM

Why to Maintain Windbox to Furnace Differential Pressure in Case of Pulverised firing boilers
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RAMConsult
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Engineering Fields - Power Engineering - New Member

Join Date: May 2007
Location: NYC metropolitan area.
Posts: 3230
Good Answers: 444
#1

Re: Differential Pressure

07/20/2011 5:27 PM

So that the pulverized coal gets blown into the furnace, not back into the windbox and creating an explosion. Googling gets you here... http://www.yokogawa.com/us/is/downloads/pdf/fieldinstruments/appnotes/Pressure/pd291101.pdf a good introduction on how Boiler Combustion Air Management Systems work. A better reference would be the boiler manufacturer, failure to understand how these inter-related systems work together is a formula for disaster.

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Ace Boeringa
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United States - Member - New Member Engineering Fields - Control Engineering - New Member

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Location: Washington USA
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#2
In reply to #1

Re: Differential Pressure

07/20/2011 9:42 PM

I can only add, GA!
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MJCronin
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Join Date: Oct 2009
Location: Central Midwest
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#3
In reply to #2

Re: Differential Pressure

07/21/2011 12:13 PM

Judge a man by his questions rather than his answers - Voltaire

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Anonymous Poster #1
#4
In reply to #3

Re: Differential Pressure

07/22/2011 5:43 AM

Why people do not think?

eg - extreme - negative windbox pressure - what will be the air flow (and hence the flame) direction

Zero- who carries the coal.

+Ve but not designed - where will the combustion (decided by the formation of the jet and its velocity) fireball be created.

...

Of course these may create some ready made answers (I have seen the google points to the CR4 links if properly searched) for others who too will like not to think.
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