This economizer is an important part of the boiler system, usually installed in the tail flue of the boiler, used to recover the waste heat of the high temperature flue gas and preheat the boiler feed water, thus:
1) improving boiler thermal efficiency: reduce the exhaust temperature (usually improves efficiency by 5%~15%);
2) Reduce fuel consumption: preheated water enters the boiler steam bag, shortening the heating time and saving energy;
3) Reduce thermal stress: avoid cold water entering the boiler directly, prolonging equipment life.
Features:
Adopting the form of heat pipe, gas and water are not serial to each other, which ensures that SO3 gas is completely isolated from the heated water, and water will not enter the SO3 system under any circumstance, so as to ensure the stable operation of the device. Through the heat pipe heat exchanger to improve the wall temperature, to avoid dew point corrosion, and at the same time can be selected according to the gas flow direction of the arrangement.
Specifications:
Temperature at flue gas inlet | 300~500°C (coal boiler) 200~350°C (gas boiler) |
Feed water heating range | 50~150°C |
Designed pressure | 4~40 MPa (matching with boiler pressure) |
Heat transfer area | 100~5000 m² (designed according to boiler capacity and flue gas volume) |
Pressure drop | Flue gas side: 100~500 Pa water side: 0.1~0.5 MPa |
