Main activities of the laboratory:
- development of chamber-type high-pressure heaters. Replacement and supply of heaters. Modernization and testing of high-pressure regeneration system;
- development and supply of control valves (CV) and main steam isolation valve (MSIV);
- development and supply of mixers for various purposes;
- development and supply of throttling devices;
- analysing of the steam separation and overheating system, of the mixing heater -condensate pump system, of the drain collector - pump for drain water system, deaerator - feed pump system in static and dynamic modes;
- development of repairing documentation for equipment of the steam turbine plant regeneration system;
- development and testing of thermal circuits without deaerator;
- balance, hydraulic and operational tests of heaters;
- analysis of heater operating modes.
- Chamber-type high-pressure heaters (PVD-K)
Advantages of chamber-type PVD:
operation safety:
the chamber PVDs don’t feature headers, which can lead to serious accidents at power units and significant destruction in the turbine hall. Chamber PVD is designed for simultaneous rupture of 7 nearby tubes, without causing the unit to stop due to PVD fault.
short payback period.
- 1. Steam shell
- 2. Spherical water chamber
- 3. Tube sheet
- 4. Heat exchange tubes
- 5. Partitions
- 6. Steam inlet tube
- 7. Heating steam condensate outlet tube
- 8. Feed water inlet
- 9. Feed water outlet
- 10. Manhole
- 11. Condensate cooling area
- 12. Steam cooling area
Vertical high-pressure heater of chamber type (PVD-K). Overview of PVD.
PVD-K-360-230-12-II
PVD-K-360-230-25-II
PVD-K-360-230-44-II
PVD-K-425-230-13-II
PVD-K-425-230-25-II
PVD-K-425-230-37-II
PVD-K-700-265-13-II
PVD-K-700-265-31-II
PVD-K-700-265-45-II
- Closed high pressure heaters for steam turbine regeneration systems
* - nominal underheating at rated load of the power unit
** - maximum admissible parameters
*** - possible supply by Violen arrangement with external vapor cooler, and parameters of PVD-K to be specified
- Characteristics of high-pressure heater connections
Dimensions of tubes and their boring can be specified for a specific turbine plant and wiring diagram.
D – thermal circuit with deaerator;
BTS – thermal circuit without deaerator.
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Horizontal high-pressure heater of chamber type (PVG-K)
Absence of water mass in the steam space of the heater is advantage of horizontal design. It decreases a possibility of moisture entering the turbine and turbine rotor overspeed, i. e. overall reliability of the turbine increases.
Main structure elements:
- casing;
- spherical water chamber;
- tube sheet;
- heat exchange tubes;
- Partition;
- steam inlet tube;
- heating steam condensate outlet tube;
- feed water inlet;
- feed water outlet;
- manhole;
- condensate cooling area;
- steam cooling area.
Chamber-type high-pressure heaters (PVD-K)
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Development and supply of control valves (CV) and fast safety device (FSD)
Control valves (CV)
FSD valves (inlet and outlet)
Fast sefety device (FSD) for high pressure heaters (PVD)
Improved design and process solutions:
