Sistemat Xerzêrî ji bo Pêşkêşkirina Hindarên Daxwazanî yên Elektrikî
Sîstema Parastina Darêya (Bîsêka Duyemîn)
Vebijarka ya ku ji bo parastina darê û derbarêya sîstemekanî ya pargîranî ya daryayê da ku di navenda sîstema hydrant de navendekar li bergeh.
Shemeke Tirandazî ji bo Yeketa Tîpa 660 MW
Sîstema Hydrant
Sîstema hydrant di navenda sîstema pargîranî ya daryayê de navendekar li bergeh bi:
Valvên îskolî yên ser demînê hatine saz kirin di pedistalên RCC de navendekar li bergeh.
Valvên hydrant (derbarî/daxili)
Kabinetên hûs
Couplings
Tûbên şevxane
Nozzle û monitorên daryayê bi hemî akseçoryan.
Akseçoryan din ên hûs boxên MS painted hatine saz kirin wekî TAC.
Hûs houses an hûs boxên derbarî hatine navendekar di periferiya binên de û hûs boxên daxili hatine navendekar di her pelanka merdiven de bi demîn main.
Monitorên Daryayê Fixed (tîpa derbarî) hatine saz kirin ji bo:
Navendeka ESP,
Oda boiler
Binên bilind
Navendeka stokanî ya malî
Bina bunker
Towera junction/transfer towers û
Navendeka yekare di navenda conveyoran malî de ku daryayê nayê betowejiyê ji bo sîstema hydrant.
Bizayên Sîstema Hydrant
Bizayên sîstema hydrant hatine dizayn kirin di navenda bizayên dizayn de bi rewşa TAC:
Sîstema hydrant hatine mezin kirin bi tenê ku 3.5 Kg/cm2 dar presiyan hydraulically remotest point (wekî TAC) di sîstemada ku pumpa hydrant hatine tirkirin bi kapasiteya û heada rated.
Velosity di demîn main de nayê veguheztin 5.0 m/s.
Derbasên du hydrant hatine saz kirin bi ring mainên serparast.
Distanca navendekariya har hydrant derbarî hatine saz kirin 45 metra. Valvên daxili/hydrant landing hatine saz kirin 45 metra di navenda TG halls, Mill bay, Boiler û navendekan din 30 metra di her pelanka space de.
Bin hatine parastîn ku hydrant di 15 metra de nav ber bin.
Har valva landing û valva hydrant derbarî li gor navendeka planta serparast wie transformer yard, TG building û Boiler area hatine saz kirin bi hûs box.
Har ring mains hatine kevek bi valva isolation û blind flange di hemî corneran de bi tenê ku vebijarka expand/modification bikin.
Heada pumpa booster system water fire hatine dizayn kirin ji bo top most pointa boiler û pressure hatine test kirin di elevationekan de.
Her landinga merdiven boiler, turbine buildings û navendekan din multi-storied structures, coal handling plant transfer points/junction towers, crusher house, bunker floors û auxiliary buildings/non-plant buildings hatine saz kirin bi valva landing bi hûs box including the hose reels.
Sîstema Spray
Sîstema spray iseretî kerdişîne. Valvên deluge hatine operasyon û kontrol kirin ji ala fire detection devices i.e. quartzite bulb detectors an ji rêbeka din fire detection. Sîstema hatine pressurized bikin ta valvên deluge.
Bi tevahî di navendeka transformers, turbine û auxiliaries, oil storage tanks, cooling units û purifiers units de navendekar li bergeh. Equipment bi karîna sîstema re spray pumps, unita controlling pressure, variety of valves û strainers hatine saz kirin. Di nav sîstema de divê methodên spray:
High Velocity Water spray system (HVWS system)
Medium Velocity Water spray system (MVWS system)
High Velocity Water Spray System (HVWS)
HVWS hatine dizayn kirin wekî regulations TAC. HVWS hatine saz kirin bi group piping, along with relevant fittings, deluge valves, isolation gate valves, spray nozzles, Quartzite bulb detector û pressure switches. Sîstema HVWS hatine saz kirin bi provîzyonê ya automatically detect, control & extinguish any outburst of fire. Sîstema hatine allow hydraulically open the deluge valve thus allowing water to be sprayed on the equipment/area through projector nozzles in the form of a solid conical emulsifying spray.
Isolation gate valve û y-type strainer hatine saz kirin di upstream û downstream side of the deluge valve. Fast acting butterfly valve hatine saz kirin as a by-pass to deluge valve, so that this valve can be kept closed and can be operated manually in case of malfunction of deluge valve.
Pressure at the hydraulically most remote point in the network shall not be less than 3.5 bars for outdoor transformers as per TAC.
Placing of spray nozzles shall be such that their spray nozzles should cones overlap each other.
Areas covered under HVWS are:
All oil filled Generator transformers and its surrounding areas.
Unit auxiliary transformers.
Unit transformers.
Station auxiliary transformers.
Stand-by maintenance transformers.
Bus reactors.
CHP auxiliary transformers.
AHP auxiliary transformers.
Station transformer (transformer rating 10 MVA and above).
All type of oil storage tanks.
Oil coolers and purifiers unit.
Boiler’s burner and its surroundings.
Turbine Lube oil storage tanks and Turbine Oil purifier.
Clean and dirty lube oil tanks.
Boiler Feed Pumps lube oil tanks, coolers, consoles etc.
Turbine Oil canal pipelines in main plant.
Fuel Oil Pressurizing and Heating Units
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