Definition

The economizer is a device installed in the lower part of the flue at the tail of the boiler to recover waste heat, heating the boiler feed water into the heating surface of saturated water under the pressure of the drum. It absorbs the heat of low-temperature flue gas, reduces the exhaust temperature of the flue gas, saves energy and improves efficiency, so it is called the economizer.

The steel tube economizer is not limited by pressure and can be used as a boiling type, which is generally made of carbon steel tubes with an outer diameter of 32 to 51 mm. Fins and ribs are sometimes added to the tube to improve heat transfer. It is composed of parallel elbow pipes (commonly known as snake pipes) arranged horizontally.

Energy-saving principle

Add a regenerative process to the cycle. Increase the average endothermic temperature. Thereby increasing cycle efficiency.

In the start-up process of the boiler (drum boiler), because the circulation of the steam water pipeline is not established, that is, the boiler feed water is in a stagnant state, and the water in the economizer is in a state of non-flow. With the strengthening of boiler combustion and the increase of flue gas temperature, the water in the economizer is easy to vaporize, making the local economizer in a state of overtemperature. In order to avoid this situation, a pipe is connected from the centralized downwater pipe of the drum to the entrance of the economizer as a recirculation pipe, so that the water in the economizer is in a flowing state to avoid its vaporization.

Product feature

(1)It has less ash deposit  

(2) It has strong wear resistance

(3) The flue gas resistance of H-type fin sub-economizer is small

(4)It is with smaller volume,less material consumption and lower price than heat pipe exchanger.