The temperature of flue gas are very high and fluctuated. This shows that the energy is wasted & boiler is in-efficient.
The parts per million (ppm) of carbon monoxide (CO) (O2) level in the excess air of the flue gas are above the regulation of Malaysia Departmental of Safety & Health (DOSH) which it has to be below 50 ppm.
The high flue & fluctuate reading on chimney indicate that the energy is not consistent and can be re-cycle for energy recovery.
Difference with Air Pre-Heat & without Air Pre-Heat could save up energy & gas consumption.
Boiler 2 consume less gas (MMBTU) average to support production lines compare to boiler 1. Boiler 1 consume average above 300 MMBTU with set point temperature 130-150 degree while for boiler 2 the highest consumption value we can see is 209.37 degree to support production lines. Hence, the efficiency of boiler is also increased.
Air preheaters help recover energy and increasing the combustion efficiency for the operation in boilers.
For combustion, hot air is used to enhance the combustion process hence the burner will use less energy to combust.
By implement this system of air preheater, the amount of natural gas consumption of the boilers itself have been reduced.