Function: Absorb the heat of low-temperature flue gas, reduce the exhaust gas temperature, Economizer reduce exhaust gas loss, and save fuel. Since the feed water is heated in the economizer before it enters the steam drum, Economizer the heat absorption of the feed water on the heating surface is reduced, Economizer and the economizer can be used to replace part of the expensive evaporation heating surface. Energy saving principle.
Add a heat recovery process to the cycle. Increase the average endothermic temperature. Thereby increasing cycle efficiency. During the start-up process of the boiler (drum boiler), Economizer the circulation of the steam and water pipeline is not established, that is, the boiler feed water is in a stagnant state, Economizer and the water in the economizer is not flowing at this time. With the strengthening of boiler combustion and the increase of flue gas temperature, Economizer the water in the economizer is prone to vaporization, Economizer which makes the economizer partly in an over-temperature state.
In order to avoid this situation, Economizer a pipe is connected from the centralized downpipe of the steam drum to the inlet of the economizer as a recirculation pipe to keep the water in the economizer in a flowing state and avoid its vaporization. When the feed water temperature increases, Economizer it will reduce the wall temperature difference when entering the steam drum, and the thermal stress will be reduced correspondingly, Economizer which extends the service life of the steam drum.