Heat Recovery Steam Generators & Waste Heat Recovery Boilers

The main components of a water-tube heat recovery boiler designed by AITESA, whether HRSG or WHRB, are

• Economizer This is a heat exchanger that recovers part of the heat from the combustion emitted by a boiler, turbine, or engine by heating the feed water or thermal fluid. The fluid gets heated to a temperature close to that of saturated liquid.

• Cold Water Heat Exchangers are characterized by working with cold water that produces the condensation of the water contained in the combustion gases. These units must be made of stainless steel to prevent corrosion.

• Superheater is a heat exchanger that increases the temperature of the saturated steam, transforming it into superheated steam. This equipment receives saturated steam from the upper part of the steam drum and is located in the initial stages of the flue gases circuit when these gases are at their highest temperature.

• Vaporisers are heat exchangers that generate steam by utilizing the energy contained in the flue gases from the boiler, engine, or turbine.

• Deareator remove oxygen and non-condensable gases dissolved in the boiler feed water. It uses part of the steam produced or from the plant to save on the chemicals required in a dosing system.

• Steam Drum is a pressure vessel typically located at the highest point of the boiler, where the separation of steam from the water-steam mixture coming from the vaporizer occurs.

Our boilers can be equipped with automatic cleaning systems for dirty gases, such as washing ramps or steam or compressed air blowers, which can be used without having to shut down the boiler.

We perform optimized designs for each turbine, engine, incinerator, or furnace, adapting the design to the client’s steam needs, capable of superheating plant-saturated steam and generating it simultaneously.