Heavy Water Board - Publication1

PERFORMANCE ENHANCEMENT OF ELECTROSTATIC PRECIPITATOR (ESP) BY AMMONIA INJECTION IN THE FLUE GAS

ESP performance parameters before and after ESP fine tuning

(with ammonia injection)

Sr.N.	Parameters	SG-3 Before Fine tune	SG-3 After Fine tune	SG-3 After Further Fine tune
1.	Flue gas temp. ^oC	147	145	151
2.	Flue gas flow Nm3/sec	42.72	48.61	48.61
3.	Flue gas humidity (volume %)	6.4	6.4	7.0
4.	Steam generation te/hr	204	199	204
5.	Coal consumption te/hr	54.6	46.0	54.6
6.	Ammonia flow kg/hr	15	15	15
8.	SPM in the flue gas mg/Nm3	140	70	20

The results obtained from Ammonia Dosing System has been exceptionally good and the operation of the system has given confidence that the SPM level in the exit flue gas can be maintained as low as possible by adjusting the ammonia feed concentration. The ammonia dosing along with the fine tuning of the ESP will result in controlling the SPM level to as low as 20-70 mg/Nm3 in line with the latest guidelines for making the stacks smokeless. The technology developed by HWB can be passed on to other power generating units.


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