What Is an Economizer?

Economizer (English name Economizer) is a device installed in the lower part of the boiler tail flue to recover the waste heat of the exhaust smoke. The boiler feed water is heated to the heated surface of saturated water under the pressure of the drum, because it absorbs high temperature smoke The heat of the gas reduces the exhaust temperature of the flue gas, saves energy and improves efficiency, so it is called a economizer.

There are many ways to classify the economizer, which can be classified as follows:

1. According to the degree of heating of the feed water: it can be divided into non-boiling and boiling.

2. According to manufacturing materials: Yes

1. Absorb the heat of low-temperature flue gas, reduce the exhaust temperature, reduce exhaust loss, and save fuel.

2. Because the feedwater is heated in the economizer before entering the drum, the heat absorption of the feedwater on the heating surface is reduced, and the economizer can be used to replace some of the more expensive ones.

Add a regenerative process to the cycle. Increase the average endothermic temperature. This increases cycle efficiency.

In the boiler (

The failure of the large-capacity boiler economizer is mainly due to leakage of the serpentine tube. Most leaks are caused by three reasons:

(1) tube wall wear, (2) poor welding quality, (3) inner wall corrosion. There are also a few cases caused by other reasons, such as poor pipe material, cracks in the pipe wall of the heat affected zone of the weld. The maintenance work should aim at eliminating these factors, grasp the internal laws, and take preventive measures. ^[3]