70,000 pph nebraska packaged watertube boiler; model nos-2a/s-55, constructed 2001 in accordance with the asme code; section. i, for a design pressure of 400 psig steam boiler is equipped with a factory installed todd vari-flame low nox forced draft burner with induced flue gas recirculation, capable of firing natural gas or #2 oil.
valving trim, controls and ancillary equipment include:
*low nox ifgr burner capable of 30 ppm nox emissions when firing natural gas.
*water column with high and low water alarms, low water cut-offs, site glass, gauge cocks and drain valve.
*boiler valve trim including; feedwater stop and check valves, safety relief valve per asme code, blowdown and blow-off valves and chemical feed stop valve.
*primary and auxiliary low water cut-offs.
*single element electro-pneumatic feedwater regulator with three valve by-pass, inlet strainer and pressure gauge.
*forced draft fan with a 100 hp tefc motor and starter, mounted and wired.
*burner management system with honeywell 7800 series programmer and first-out annunciator, relays, limit switches, alarm and indicating lights.
*combustion control system; single point electro-pneumatic positioning consisting of a moore 353 microprocessor based controller with expandable i/o capability, automatic or manual firing rate adjustment.
*steam pressure limit switches; safety limit with manual reset, operating limit and low fire hold steam pressure controls.
*fuel oil pump and drive with by-pass and relief; mounted, piped and wired.
*flue gas recirculation assembly with fgr breeching and damper, fully mounted and wired.
*nema 4 and 12 electrical enclosures and seal-tite conduit.
*fuel valving, trim and controls meeting fm and iri insurance standards.
*nfpa-8501 safety code.
*national board certified.
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