Boiler Economizer

Boiler EconomizerIndustrial Boilers America manufacturers a boiler economizer that are heat exchange devices for heating water. They can make use of the enthalpy in fluid streams that are hot, but not hot enough to be used in a boiler, thereby recovering more useful enthalpy and improving the boiler’s efficiency. They are a device fitted to an Industrial Boiler which saves energy by using the exhaust gases from the boiler to preheat the cold water used to fill it.

The boiler room consumes large quantities of energy. It consists of thermal fluid boilers or steam boiler, with exhaust gases through a common chimney. An indirect contact or contact condensing boiler economizer will recover the residual heat from the combustion products. A series of dampers, an efficient control system, as well as a ventilator, allow all or part of the combustion products to pass through the economizer, depending on the demand for make-up water and/or process water.

Our economizers are commonly used as part of a heat recovery steam generator in a combined-cycle power plant. In an HRSG, water passes through a boiler economizer, then a boiler and then a superheater. The economizer also prevents flooding of the boiler with liquid water that is too cold to be boiled given the flow rates and design of the boiler.

A common application of economizers in steam power plants is to capture the waste heat from boiler gas, located in the stack (flue gas) and transfer it to the boiler feedwater. This raises the temperature of the boiler feedwater, lowering the needed energy input, in turn reducing the firing rates needed for the rated boiler output. Boiler economizers lower stack temperatures, which may cause condensation of acidic combustion gases and serious equipment corrosion damage if care is not taken in their design and material selection.

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