A mini project review on waste heat recovery boiler

1. DESIGN AND CFD ANALYSIS ON WASTE HEAT
BOILER
By
Mr. Md Danish (14Q91A0399)
Mr. Tanmoy Dey (14Q91A03B9)
Mr. J.Vineeth (14Q91A0362)

2. ABSTRACT
 Waste heat boilers are used to recover waste heat from high temperature
exhaust in chimney stacks.
 Waste heat boilers are typically water tube boilers which use large volume
,high temperature waste heat steams as heat source as opposed to
conventional fuel.
 These system burns fuel in waste heat boiler or an after burner may be added
to the exhaust gas duct just ahead of the boiler.
 Waste heat boiler were modeled in CREO and was analyzed in ANYSYS.

3. INTRODUCTION TO BOILER
WHAT IS BOILER AND HOW IT WORKS
 A boiler is a closed vessel in which water or other fluid is heated. The fluid does
not necessarily boil.
 A boiler is water containing vessel which transfers heat from a fuel source into
steam which is piped to a point where it can be used to run production
equipment, provide heat etc.
 The pressure vessel of a boiler is usually made of steel or alloy steel, or
historically of wrought iron Stainless steel.
WHAT IS WASTE HEAT ?
 “Dumped” heat that can still be reused.
 “Value” more important than quantity.
 Waste heat recovery saves fuel .

4. TYPES OF BOILER
 Water tube boiler
 Fire tube boiler
 Working pressure and Temperature
 Fuel type

6. ADVANTAGES AND DISADVANTAGES
ADVANTAGES
 Reduction in pollution, Thermal
and air pollution will Dramatically
decrease.
 Reduction in equipment size.
 Reduction in auxiliary energy
consumption
DISADVANTAGES
 High capital cost.
 Maintenance of equipment is high
and it requires additional
maintenance.
 Quality of heat is main concerned.

7. METHODLOGY
 3D Modelling
 Material selection
 Fuel selection
 Finite Element Analysis
 Result

8. 3D MODELLING
 Waste heat recovery boiler setup is Modeled in creo 3.0
 Height of the Boiler stack is 70 meters.
 Diameter of the Boiler stack is 20 meters.

9. MATERIAL
 Boiler is generally subjected to high internal pressure forces . Therefore to
achieve the balance between cost and strength ,we used grade is IS 2062
grade A.
Reasons for using this material is :
 These are available in a variety of thickness from 1 mm to almost 120 mm.
 They can be easily heat treated to achieve greater surface hardness.
 They can be easily welded and cut and hence are useful for manufacturing.

10. FINITE ELEMENT ANALYSIS
3D Model Mesh Model

11. PARAMETER AND ITS RESULT
 Pressure  velocity

12. RESULT TABLE

13. CONCLUSION
 By observing CFD analysis the heat transfer rate mass flow rate , pressure
and velocity increases by increasing the mass flow inlets of the waste heat
boiler and increasing the heat transfer rate of the fluid air .
 Recovering waste heat or using heat for alternative systems applications
help reduce costs and lessens the over all environment impact .

14. THANK YOU