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Posted by Boiler Guy on December 22, 2006 at 19:47:07:
In Reply to: D.A. capacity(volume) posted by Joey on December 22, 2006 at 12:04:13:
Assuming you have conventional boilers 1 boiler horsepower = 34.5 pounds per hour of steam. A 200 HP boiler will generate 6,900 pph of saturated steam based on the supply of feedwater at 212 deg F. If I read correctly you have a pair of 200 HP boilers and a 95 HP boiler for a total steaming capacity of 495 HP or 17,077 pph of steam total. Steam to a DA/sparged feedwater tank will reduce the total amount fo steam that can be exported to process but will not impact the gross generation.
: My question-condition is this. We have a 200Hp F.T. Boiler that generates 4000lbs. of steam per hour and another that generates 3000lbs. of steam perhour and as well a 95Hp W.T. Boiler that generates 3300bs. of steam per hour. We currently are operating using one deaerator that supplies feedwater(210degF) rated at 7000lbs. perhour and another D.A.(180degF) that supplies the same. However, that latter has trouble maintaining proper level and is down right now. No-one here seems to be able to properly explain to me why. The mill I work at is expanding and the contractor is installing another 95Hp W.T. Boiler. Will these two D.A.'s be able to supply the four boilers with feedwater? Thank you for any help or suggestions in advance.
: JF