In its most simple form the air flow SP is the greater of the boiler master and the actual fuel flow PV (%) and the fuel flow SP is the lesser of the boiler master and the actual air flow PV (% after it is run through the FAR PWC and O 2-trimmed). This forces to lead on firing rate increases and to lead on decreases and ensures ...
Oct 01 2017 · The fuel moisture content was directly measured during the experiments and the main parameters of the boiler were recorded. As a result the following conclusions were made: The standard sensors to determine the oxygen in the flue gas used for the automatic did not provide the proper moisture compensation.
The boiler combustion control system is designed to maintain a proper air/fuel mixture under varying load conditions and within safe limits. The system should provide nearly complete fuel combustion as efficiently as possible. Discussions here are limited to oil and/or natural gas fired industrial .
Even so-called "on-ratio" combustion used in boilers and high temperature process furnaces incorporates a modest amount of excess air - 10 to 20% more than needed to burn the fuel completely. If insufficient amount of is supplied to the burner unburned soot smoke and carbon monoxide are exhausted from the .
The fuel control system is mainly used to change the amount of fuel entering the furnace according to the boiler instruction. Among them the forced draft control system is in pursuit of the best air-coal ratio (i.e. the vs injected into the ).