Nov 15, 2009 · High Furnace Pressure in Boiler. Combustion in a boiler furnace is normally considered a controlled explosion, as all boilers operate at a regime where explosion pressure is the maximum. This is mainly due to the fact that it is at this regime we get the maximum efficiency of the boiler. Furnace pressure in boilers is one of the most critical and important parameter to be maintained and monitored.
why negative pressure is maintained in furnace?
May 03, 2017 · Positive pressure :- When the pressure in combustion area of the boiler is more than atmospheric pressure, normally forced draft boilers, HRSG are positive pressure. Negative pressure :-When the pressure in combustion area of the boiler is less than atmospheric pressure. This is achieved in balanced draft boilers by using Forced draft fans to force air into boiler (pressuring it)and Induced …
Jan 30, 2018 · When your heating, cooling, and ventilation (HVAC) system is poorly designed for the space or just not working properly, you can end up with positive air pressure or negative air pressure. What is positive air pressure? If you have an HVAC positive pressure problem, the air pressure inside your space is too high, and air is being forced out.
Apr 04, 2019 · Flue gas oxygen; Furnace pressure (draft) Basic Control Outputs. The following basic control outputs are typically required for implementing boiler control: Fuel flow control valve(s) Forced draft (FD) fan damper and/or speed; Induced draft (ID) fan damper and/or speed; BFW flow control valve; Advanced Applications; Boiler controls typically include the following advanced applications
interruption) For positive furnace pressure, a value which would be the lesser of either +35"wg or FD Fan test block capability at ambient temperature. For negative furnace pressure, a negative value whose absolute value would be lesser of either the absolute value of -35"wg or the absolute value of ID Fan test block B.S. Tanwar,
Boiler Operation with Low Furnace Pressure - Bright Hub Engineering
Jan 23, 2010 · Depending on the indication and the reason for the cause of the problem the boiler operator will have to respond. Switch to induced draft fan control from auto mode to manual mode if the control system is the reason leading to low furnace pressure and take corrective action.