Boiler Blowdown System Improvement

1
Boiler Blow-down Improvement Team Air
Products Brain Parris, Todd Fitzgerald, Matt Van
Horn
Final Concept Hold-Up Volume 396
gallons Height 96 inches Diameter 54
inches Outlet Temperature 95 F
Mission Statement To improve the steam boiler
blow-down system in order to reduce the cost to
operate and maintain the system in compliance
with state regulations. Current Process Water
discharged from the bottom of the boiler at
365 F and 160 psig and continues to a flash tank
water separates into vapor and liquid Piping
Diagram Flash Tank
Boiler Initial Investigation
Isolate and prioritize the different problem
areas in the blow-down system. Wants
Constraints Outlet water temperature lt 150 F
Outlet pipe area twice inlet pipe area Water
discharged to sump lt 95 F

Proof of Concept Validation of analytical
model using experiment
Boiler Blow-Down Experiment Acquire the flow
rate of water during a blow-down Determine the
amount of cooling water required to reduce the
water to 95 F
Work In Progress A process and instrumentation
diagram of the final concept Design Hazard
Review The HAZOP method was used to determine
and eliminate any potential problems with the
final design.
Flow Rate 126 gal/min
Cooling Method Selection Using thermodynamics
we were able to predict which cooling method was
the most efficient.