grate area, Furnace area and Furnace volume in boiler operation and performance.
1. we know that the fuel is to be burned in the boiler furnace to generate steam for process and power generation.
2. As such where the fuel has to be burned is called grate and this grate area plays very important role in boiler operation and its performance.
3. The grate area should be sufficient enough to burn the required quantity of fuel continuously to liberate heat for steam generation. lesser the area then sufficient amount of fuel cannot be burned resulting in less steam generation. more the area the flue gas velocity gets reduced such that heat transfer will be erratic thereby influencing its performance.
4. stationary grate, traveling grate, pulsating grate, dumping grate, fluidised bed are types of grates normally used in boilers.
5.The Furnace area will be little more than grate area and the function is to transfer radiant or direct heat transfer to water wall tubes and is part of total heating surface of boiler comprising water wall tubes, inbeded tubes in FBC boilers.
6. Furnace volume is the complete volume of the Furnace consisting Furnace area, water wall refractory area, screen tube area, super heater zone, etc primarily almost all heat transfer areas included in upto total height of the Furnace. the larger the volume, burning of fuel more efficient, better heat transfer, more efficient burning of volatiles and reducing unburnt fuel. proper circulation of flue gases through all heating surface and better control of flue gas temperature.
Thus grate area, Furnace area and Furnace volume are plays more important roles in optimization of boiler operation and its performance. proper care must be taken to check these parameters proportional to boiler capacity before we place order for boiler.
It is very sad to say the commercial minds of manufacturers dominating their engineering brain in order to survive in the present competitive environment as such we are forced to face operational problems.
For more information one can always contact me by mail or phone given below
K GOPALAN
kgopalan1956@gmail.com
9420663740/9108956202.
