PRDS | Russol

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 info@russol.org

These equipment can be found by the next tags: Pressure-reducing cooling station, Pressure-reducing and desuperheating station, PRDS, Fast-response pressure-reducing and desuperheating station, Fast-response PRDS, Cooling station, Pressure-reducing station, Valve, Valves, РОУ, Редукционно охладительная установка, Редукционно-охладительные установки, БРОУ, Быстродействующие редукционно-охладительные установки, РУ, Редукционная установка, ОУ, Охладительная установка, Арматура, Арматура энергетическая, Клапаны, Вентиля

Capacity ^?:		ths. m³
Total pressure ^?:		Pa
Temperature ^?:		С ^о
Permissible variation ^?:		%

Capacity:		t/h
Output pressure:		MPa
Output temperature:		С ^о
Permissible variation ^?:		%

Capacity:		MW
Output pressure:		MPa
Permissible variation ^?:		%

DN:		mm
Pressure:		MPa
Temperature:		^оС
Permissible variation ^?:		%

① Fan type:	FD Fan ID Fan
② Subtype:
③ Climatic modification ^?:
④ Scroll layout ^?:	° - °
⑤ Rotation direction ^?:	Right-hand Left-hand
⑥ Quantity:	pcs.
⑦ Delivery date:

① Capacity:	ths. m³/h
② Handled medium temperature:	°C
③ Total pressure:
④ Atmospheric pressure: ^?:
⑤ Required efficiency:
⑥ Capacity regulation: ^?:	Yes No

① Type: Asynchronous squirrel cage Asynchronous with phase-wound rotor Synchronous
② Climatic modification ^?:
③ Rate speed:	rpm
④ IP ^?:	IP
⑤ Supply-line voltage:	V
⑥ Frequency:	Hz

① Density	kg/Nm³
② Dustiness:	g/Nm³
③ Agressive agents content:	%
④ Sticking tendency: ^?

① Company name:*
② Contact person:*
③ Telephone:*
④ Fax:
⑤ Email:*
* - fields are to be filled.

① Boiler type:	Steam Hot-water
② Application:	Heating Hot-water supply Process needs Power generation
③ Fuel ^?:	1: 2:
④ Quantity:	шт.
⑤ Delivery date:

① Steam capacity:	t/h
② Output pressure:
③ Output temperature:	°C
④ Supply water temperature:	°C

① Capacity:
② Operating output pressure:
③ Water temperature graph:	°C

Combustion chamber:
Steam superheater	Economizer
Air heater	Coal pulverization
Mill fan	FD Dan
ID Fan	Ash catcher
Chimney	Ash and slag removal
CPCS	Phosphatizing
Water treatment	Soot blowers

① Grade:
② Calorific value:	kcal/kg
③ Lump size:	mm
④ Humidity:	%
⑤ Ash:	%
⑥ Ultimate composition:	% - Carbon (C) % - Hydrogen (H) % - Oxygen (O) % - Nitrogen (N) % - Sulfur(S)

① Calorific value: ^?:	kcal/m³
② Gas cubic meter weight:	kg/m³
③ Gas temperature:	°С
④ Ultimate composition:	% - Carbon monoxide (СО) % - Carbon dioxide (СО2) % - Hydrogen (H2) % - Oxygen (O2) % - Nitrogen (N2) % - Methane (CH4) % - Heavy hydrocarbon (СmHm) % - Hydrogen sulphide (H2S)

① Control type:	Manual Actuator
② Actuator producer:	Russian Other
③ Total opening (closing) time:	s

① Pipeline	Outer diameter: mm Wall thickness: mm
② Type of connection:	Welded neck Flanges
③ Additional requirements:

① Calorific value:	kcal/kg
② Ash:	%
③ Lump size:	mm
④ Humidity:	%

① Fuel grade:
② Calorific value:	kcal/kg
③ Flash point:	°С

① Type:
② Subtype:
② Subtype:
② Subtype:
③ Operating medium:	Steam Water
④ DN:	Input: mm Output: mm
⑤ Climatic modification ^?:
⑥ Leakage class ^?:
⑦ Body material:
⑧ Quantity:	pcs.
⑨ Date of delivery:

① Fluid temperature:	°С
② Input pressure:	MPa
③ Output pressure:	MPa
② PN:	MPa
③ Operating pressure:	MPa
④ Max. flow rate under min. pressure differential, Gмах:	t/h
⑤ Max. flow rate Gмах:	t/h
⑥ Min. pressure differential unde max. flow rate:	MPa
⑦ Max. pressure differential under min flow rate:	MPa
⑧ On-stream time under max. pressure differential:	h/year
④ Opening pressure:	MPa
⑤ Reverse-seat pressure:	MPa

① Main steam capacity:	t/h
② Desuperheated steam capacity:	t/h
③ Main steam pressure	MPa
④ Main steam temperature	°С
⑤ Desuperheated steam pressure	MPa
⑥ Desuperheated steam temperature	°С
⑦ Cooling water pressure	MPa
⑧ Cooling water temperature	°С