By Kenneth E. Heselton PE
Written for the boiler operator who has wisdom and event, yet wish to study extra which will optimize his functionality, this article is usually clearly-presented adequate to be an integral advisor for these starting their careers, in addition to being appropriate for managers and superintendents drawn to lowering a facility's working cost. according to the author's 40 years of expertise in boiler plant operation, layout, development, start-up, retrofit and upkeep, it includes completely key suggestions to operators and bosses of vegetation huge and small.
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Extra info for Boiler Operator's Handbook
If the circuit is open between the two points you put your test leads on you will get a reading or the light will shine. The circuit will not operate because the meter or light doesn’t pass enough electrical current. ” The light was connected to the grounded conductor and a piece of wire long enough to reach anywhere in the panel was connected to the light and left coiled up in the bottom. ” The idea was to allow the operator to pick up that lead and troubleshoot the system when he had problem.
When an accumulation ignites it burns at a rate dictated by nature and that’s a lot faster than our normal fire, so fast that the products of combustion expanding can create a pressure wave which will create a force of 18 to 70 psig. The explosions we experience and call a puff were simply small accumulations of an explosive mixture which did not produce pressure high enough to rupture the furnace. It’s not always possible to avoid a puff or rough light off. They occur when burner systems fail to repeat the conditions established when they were set up.
Flammability range 23 cause we make sure it works before you get your hands on it. Getting the mixture in the flammable range isn’t the only criteria when it comes to combustion in a boiler furnace. The only way that flame will burn steady and stable is if it begins at the UEL. In other words, the point where ignition begins is where the fuel and air mixture pass from a really fuel rich condition into the explosive range. I can still recall looking through the rear observation port into a furnace full of pulverized coal and air, so much that it looked like a fog in there.