Pressure-reducing and desuperheating stations (PRDS) are designed for:
1.Medium power boiler reservation
2.Turbine extraction reservation
3.Backpressure turbine reservation
4.Low- and medium-pressure boilers parallel operation
5.Continuous service with consumer
6.Steam usage for boiler startup
By the nature of activity the mentioned equipment can be divided into 4 main groups:
PRDS - Pressure-reducing and desuperheating stations are designed for reducing pressure and temperature up to target values. Steam is throttled passing through dumper type throttle valve and steam cooler lattice. Multiple stage throttle (in valve and lattice) reduce noise level caused by steam expansion. Steam flow can be changed with the help of throttle valve which is constructionally similar to control valve. Water is injected into steam cooler through atomizers. Due to its evaporation the steam become cool. Water flow is controlled by constant flow valve. Regardless of PRDS capacity constant flow valve is feed with fixed amount of water. In this valve the water flow is divided into injection and drainage flows. This division is effected on account of distributing valve displacement.
FPRDS - Fast-response pressure-reducing and desuperheating stations are designed for dumping excess steam supplied from boiler because of down limit of its steam capacity which far exceeds turbine steam consumption under no-load or light load operations. These stations are also designed for steam dumping into condenser under sharp drop of load on generator and emergency cases when turbine sudden outage can take place.
PRS - Pressure-reducing stations are designed for reduction of pressure to target values.
DS - Desuperheating stations are designed to cool steam to required temperature.
Russol R&MA designs and manufactures PRDS, FPRDS, PRS, DS in accordance with your requirements. Please fill in the questionnaire for required stations or send us your requirements via firstname.lastname@example.org