Sistem Hydrant Don Hudda na Gida na Noma Turuwa
Sistem Larabci na Yawancin Turbin (Part-II of III)
Tana taka cikin wannan rukunin ya shafi sistem na larabci mai yawa da sauran sistem na hydrant a yawancin turbin.
Karamin Sistem na Hydrant ga Kwakwalwa ta 660 MW
Sistem na Hydrant
Sistem na hydrant zai gudanar da hanyar jirgin ruwa mai yawa da:
Gidajen kofin kofin kananan kananan da ake samu a cikin RCC pedestals a gaban abubuwan da za su dace.
Kofin hydrant (gaba/gabashin)
Sabon kabinet
Kofin kofin
Kofin kofin
Nozzles da monitoren ruwa saboda duk ingantaccen.
Sauran ingantaccen kamar kabinet ruwa da ake sanya da MS zai bayarwa a cikin TAC.
Kabinet ruwa ko kabinet ruwa zai aiki a gaban gabas masana'antar birni da kabinet ruwa “kabinet” zai bayarwa a gaban har da kofin kananan kananan.
Monitoren ruwa (na gaba) zai bayarwa don:
ESP areas,
Boiler house
Tall building
Coal stock pile area
Bunker building
Junction tower/transfer towers and
Sauran abubuwan a cikin coal conveyor a wurare da ruwa ba zai iya haɗa da sistem na hydrant.
Talabolin Sistem na Hydrant
Talabolin sistem na hydrant zai gudanar da hanyar wani abu da ake fuskantar da TAC:
Sistem na hydrant zai gudanar da hanyar hanyar da ke amfani da ita don tabbatar da cewa kadan 3.5 Kg/cm2 pressure zai aiki a wurin da ke da kyau (a cikin TAC) a cikin sistem da kofin hydrant yake aiki a cikin pump capacity da head.
Veloce a cikin main na hydrant ba zai iya haɗa 5.0 m/s.
Zai bayar da kafuwa hydrant da ring main mai sauƙi don plants mai yawa.
Kyakkyawan hydrant na gaba zai bayar da 45 mita distance. Kofin hydrant/landing valves zai bayar da 45 mita distance a cikin TG halls, Mill bay, Boiler and other area 30 Meters distance at each floor space.
Zai ce birnin da take da al'amuran da ake bayarwa da hydrant idan hydrant yake a cikin 15 mita daga birnin.
Har kofin landing valves da kofin hydrant na gaba da ake bayarwa don plants mai yawa kamar transformer yard, TG building and Boiler area to be provided with a hose box.
Har ring mains zai buɗe da kofin isolation valve da blind flange a duk kofin don in iya bayar da future expansion/modification.
Head na pump na fire water booster system zai gudanar da hanyar wurin da ke da kyau a cikin boiler da pressure zai aiki a wannan elevation.
Duk kofin landing valves da turbine buildings da sauran multi-storied structures, coal handling plant transfer points/junction towers, crusher house, bunker floors da sauran auxiliary buildings/non-plant buildings zai bayarwa da landing valves da hose box including the hose reels.
Sistem na Spray
Sistem na spray yana yi aiki automatically. Deluge valves sun yi aiki da kontrollewa da fire detection devices i.e. quartzite bulb detectors ko da sauran hanyoyin fire detection. Sistem na spray zai iya pressurize har zuwa Deluge valves.
Yana ƙunshi duk transformers located area, turbine and its auxiliaries, duk oil storage tanks, cooling units and purifiers units. Ingantaccen da ake amfani da su a cikin systemin shine spray pumps, pressure controlling unit, variety of valves and strainers. Akwai biyu hanyoyin spray system:
High Velocity Water spray system (HVWS system)
Medium Velocity Water spray system (MVWS system)
High Velocity Water Spray System (HVWS)
HVWS zai gudanar da hanyar tarihin TAC. HVWS zai gudanar da hanyar piping group, saboda hanyoyin fittings, deluge valves, isolation gate valves, spray nozzles, Quartzite bulb detector and pressure switches. Sistem na HVWS zai taimaka waɗanda suka shahara da detect, control & extinguish any outburst of fire. Sistem na yana iya hydraulically open deluge valve don in iya haɗa ruwa a cikin projector nozzles a cikin form of a solid conical emulsifying spray.
Isolation gate valve and y-type strainer zai bayarwa a upstream and downstream side of the deluge valve. Fast acting butterfly valve zai bayarwa 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
Statement: Respect the original, good articles worth sharing, if there is infringement please contact delete.
