CASE STUDY: BOILER SYSTEM DESIGN TO CONSTRAINTS

摘要

Aboiler system design was requested for a large food manufacturer that required 140,000 lb/h of saturated steam. Saturated steam is steam supplied at the vapor/water saturation point for a given operating pressure. In this case the saturated steam at 90 psig was at 331 F and the 175 psig steam was at 377 F. Operations required that the full boiler capacity was 90 psig of saturated steam, but lower quantities of steam were required at 175 psig of steam for daily process plus 90 psig steam for building heat requirements. The full steam capacity is needed only quarterly for building sanitation requirements. Available plant space was ample, but limited in ceiling height. The system design was to include a new condensate collection system, makeup water treatment system, deaerator, and feedwater pumps.