9/5/2023 0 Comments R c calibrated draft controlNormally in a boiler, a forced draft (FD) fan draws air from the atmosphere and gives a huge boost to the draft.Also, this should be as close to the atmosphere to minimize the ingestion of excess air drawn through openings.Generally, this draft is maintained slightly negative to prevent the combustion products, and ash from being discharged from the furnace into surrounding areas through inspection ports, doors, feeders, etc.This pressure difference is known as draft whether measured above or below atmospheric pressure.This requires a pressure difference to accelerate the gasses to their final velocity plus friction losses.The combustion of fuel requires oxygen called air, to move the required air through the fuel bed and to produce a flow of the gaseous products of combustion out from the furnace, to the chimney through the superheater, economizer, and air preheater.Furnace pressure is commonly known as draft or draft pressure or sometimes furnace draft.For the flow of Air and Fuel into the furnace and the flow of Flue gas from the furnace to the chimney. The driving force for this flow is the differential pressure between these gasses inside and outside the furnace. Considering Air and Flue gas Circuit, here the Air and Fuel such as coal or Bagasse are mixed and ignited in the combustion chamber at the furnace.Cooling Water Circuit Furnace Draft Control System.A basic boiler system consists of various circuits such as
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |