Cimento klinker firini (rotary kiln) 1450 C calisir ve multi-fuel (komur, petcoke, dogal gaz, RDF, lastik) yakar. Flame failure sonucu yakit birikimi patlama yaratabilir (furnace explosion). NFPA 85 (Boiler and Combustion Systems Hazards Code) purge, BMS (Burner Management System), flame detection ve fuel cut-off kurallarini tanimlar.
Burner Management System (BMS)
- Class: SIL 3 (IEC 61511 process safety)
- Dual-redundant PLC: Siemens S7, Honeywell Safety Manager
- Logic: 1oo2 or 2oo3 vote
- Proof test: 12 ayda bir full functional
Pre-Firing Purge
- Suresi: Furnace hacminin 5 katı hava geçişi
- Debi: Tum induced/forced fanlar max
- Minimum: 5 dakika (pratikte 15-30)
- CO izleme: purge sirasinda <50 ppm
- Interlock: purge tamamlanmadan ateselme yok
Flame Detection
- Main flame: UV/IR scanner
- Pilot flame: Ionization probe
- Loss-of-flame: 4 saniye - yakit trip
- Dual fuel: Flame scanner her fuel icin ayri
- Scanner kalibrasyon: Haftalik self-check
Fuel Cut-Off Valfleri
- Double block + bleed: Gaz hatti
- Tight shut-off: ANSI Class VI
- Response: <1 saniye kapanma
- Spring-return: Fail-close (elektrik kesilince kapanir)
- PST (partial stroke test): Ayda bir valf cevap kontrol
Tire/Alternatif Yakit (RDF)
- Pre-processing: Metal ayirma magnet, homojenlestirme
- Besleme kontrolu: Belt scale, NFPA 664 ahsap cips benzeri risk
- Klinker firin icin uygun: 1450 C - toxik madde parcalanir
- Lastik parcasi: Caliper ve metal tel - besleme patlamasi riski
Firin BMS MEP Calc ile
MEP Calc klinker firin icin NFPA 85 purge sure ve debi, flame detection response time ve fuel cut-off valf seciminde yardimci olur.
MEP Calc'i App Store'dan indir
Kaynaklar & İleri Okuma
NFPA 85, NFPA 86, NFPA 54, IEC 61511, ASME B31.3, Cembureau Coprocessing Guidelines. NFPA 85 Boiler Hazards kodu.