Economisers are designed to recover heat from Boiler exhaust gasses at the Steam, Heat or Power Generation plants. Boiler exhaust gasses are transferred to the incoming boiler feed water, increasing the overall koiler thermal efficiency. The most economical way to improve efficiency of a boiler system is economiser usage behind to boiler.
Selnikel has successfully installed almost 7.000 economisers up to this day.
With Selnikel economiser application, it is possible to obtain;
- Increased boiler efficiency
- Reduced fuel consumption
- Low temperature exhaust gas and reduced emissions
- Stainless Steel Economiser
- Carbon Steel Economiser
- Finned tube type
- Tube type
- Feed water heater
- Cold/Usage water heater
- Air preheater
Regarding the applied fuel type, SELNIKEL’s economisers increase boiler thermal efficiency by 3% - 8% resulting reduced energy consumption, fuel savings and reduced emissions. The end user therefore reaches a shorter Return on Investment time.
The thermal layout is established in accordance with the given parameters of exhaust gas volume and temperature, feedwater volume - temperature and the required ﬂue gas temperature downstream of the economiser. The philosophy of economizer is same as for air preheater.
According to the size of heating surface and place of use, the exhaust gas is cooled down to approximately 50°C.
The economisers can be categorised as the following varieties:
As per economiser materials;
As per tube types;
Heated fluid types;