Web Exclusive: Boiler feedwater control – ISA
Single element feedwater level control. Single element drum level control measures drum level only. This is a simple feedback control loop (Figure 1). The mass of the water flow and the steam flow must be regulated so mass water flow equals the mass steam flow to maintain drum level. The feedwater control regulates the mass water flow to the boiler. The effects of the input control actions interact, since firing rate also affects steam temperature and feedwater flow affects the steam …
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DRAFT BOILER/FEEDWATER GUIDELINES
Lake water has approximately 180 ppm of dissolved solids. 1,000,000 pounds of this water will contain approximately 180 pounds of solids. A 100 hp boiler vaporizing 3,450 pounds of this as make-up water would leave behind 0.62 pounds of solids. Well water can have as high as 1,250 ppm of dissolved solids.
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Boilers – me.ua.edu
Traveling or Chain Grate Stokers Traveling or chain grate stokers feed coal out onto a rotating metal belt that supports the fire. Coal is fed from a hopper. Grate speed is automatically controlled to maintain desired steam pressure. Burning progresses as the belt moves from front to back of furnace.
Ch 87 Flashcards | Quizlet
The low water cut off can be tested by Shutting off the feed water An automatic boiler on-off or operating control switch has an adjustment for cut in or cut out value and another for
boiler water feed issue – YouTube
Oct 13, 2010 · interesting issue with potential for flooding a steam boiler.