Desuperheaters
Desuperheaters are designed to reduce the temperature of superheated steam for optimal heat transfer and efficiency as well as reduced degradation of system components. Desuperheaters are custom designed for each application and are available in various materials. The efficient geometry allows for direct installation into the steam pipeline with flanged connections. Typical applications include pulp and paper, food processing, HVAC, and shipboard service, among others.
Desuperheaters - Spray Type
The simple spray type desuperheater is used in applications where the steam load remains relatively constant. Cooling water is injected into the superheated steam through a nozzle. The steam temperature is reduced by evaporative cooling. The maximum turndown ratio of the spray type desuperheater is 2:1.
Desuperheaters - Venturi Type
The venturi design uses the velocity of the steam to atomize the cooling water and effectively increase the turndown ratio to 10:1. The cooling water entering the unit is preheated in a circulatory chamber located at the entrance of the inner venturi. The water is then introduced into the inner venturi through a series of engineered jet ports and is atomized by the steam.
Desuperheaters - Ejector Type
The ejector type desuperheater can be used over a wide range of steam flow rates and can operate with a turndown ratio of 50:1. This design uses a small amount of high-pressure steam to atomize the cooling water in the mixing chamber. The expansion of the atomizing steam creates a depression in the mixing chamber while cooling water is ejected into the chamber. Both flows are thoroughly mixed and discharged into the main process steam.
Features
- Desuperheater sizes range from 2" to 30" for wide application
- Steam system knowledge is applied to design and sizing
- Superheated steam temperature reduction improves heat transfer properties
- No moving parts or special supports required
- Optional control package available
