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Re: 600# 700 degree superheated steam boiler bottom blows


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Posted by David on January 12, 2004 at 06:45:29:

In Reply to: Re: 600# 700 degree superheated steam boiler bottom blows posted by David on January 12, 2004 at 06:33:41:

What are some of the possible side effects of opening the bottom blow to the point of achieving a 5% to 7% increase in feedwater and leaving it this way? This is a 600# pressure, 700 degree superheated boiler that produces 165 kpph of steam. The boiler was loaded to 120 kpph at the time. Note: The purpose of these inquires is related to an investigation that I am doing at work on a ruptured outside roof tube on a 1958 vintage CE boiler. One of my operators had done a bottom blow as described above in order to remove high silica levels. (surface blow was maxed out at the time. later found the strainer in the metering block valve was plugged thus preventing full surface blow. I, as an ex-BT know that what happened is wrong. I need something to back up my theory.


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