Boiler Safety Measures Mr B L Prabhu

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Boiler Safety Measures Mr. B. L. Prabhu , Safety Officer

Measures taken to reduce the hazards ensuring the safe and reliable working • Remnant Life Assessment ( RLA ) of boiler pressure parts , also a legal requirement for unit, which have completed 1 lakhs operating hours OR 15 years in service, which ever is earlier. • Inspection and certification of the safety valves

Measures taken to reduce the hazards ensuring the safe and reliable working • Conditioning monitoring of the boiler by using NDT Techniques like inspection of deposits in tubes of different sections, hardness testing, Dye penetrate and ultrasonic testing of weld joints. • Trivi test; by increasing drum pressure

Measures taken to reduce the hazards ensuring the safe and reliable working • Destructive testing of sample tubes during overhaul of boiler. ( tensile test ) • Regular monitoring of tube thickness, tube scanning and advance techniques like LFED ( Low frequency Electrodynamic Device. )

Measures taken to reduce the hazards ensuring the safe and reliable working • Ensuring proper protection by periodic checks by simulating or relevant procedures. ( At the end of the outage simulating scenarios / faults & checking MFT and checking healthy working of protection. ) • Hydro testing of boiler once in a year

Controls for boiler in service • Permissive for boiler purging prior to lightup. ( By using FD&ID fans to clear all explosive mixture if any) • Flame scanners-for detecting the flames of the burners. ( Sensing the flame by UV sensors) • Furnace draft control to avoid explosion / implosion of boiler / ductings. • Various other controls for monitoring feed flow, combustion control etc

Controls for boiler in service • Acoustic sensors to detect the sound of the tube leak in the furnace. • Alarms and monitoring and controls to maintain the water chemistry. • Alarms and monitoring metal temperature of pressure parts. ( Water chemistry, p. H value, unwanted chemicals such as Silica) • Gas Leak detection system in the firing aisle of boiler and near gas station.

Controls for boiler in service • Regular house keeping reports and checks. • Provision for installing the rupture disc in coal mill inlet air ducts is in progress (Inside coal mill air inlet duct as certified by NFPA ) .

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