Air Preheater

Regenerative Air Preheater

Rotary Regenerative Air Preheaters especially of the Ljungstrom design play a very important role in improving the fuel efficiency of the modern thermal power plants and furnaces in the process industries. Approximately for every 20 deg C drop in the flue gas temperature in air heaters the fuel efficiency of the steam generator goes up by about 1%. This results in very high fuel savings. Further there is a considerable reduction in auxiliary power consumption if the heaters are kept well maintained. The cost of critical spares is recovered in a few months of operation.

Lungstrom heaters also find application in Gas-Gas heat transfer duty in flue gas de-sulphurization process with corrosion resistant and special materials.

Hariharan Power Private Limited provides a complete range of Regenerative Airheaters as well as critical spares from seals to bearing assemblies for any make and size of Airheaters for both Gas -Air and Gas - Gas applications with high standards of quality, shortest possible delivery time and the most economical price, in order to meet the timely requirements of customers. Our technical team consisting of personnel with energy and wisdom having decades of experience, can offer suggestions for modifications and improvements to enhance steam generator fuel efficiency, to reduce airheater leakages and to achieve high performance reliability in operation.

1. Rotor Assembly
  • Rotor Post
  • Diaphragm plate
  • Stay plate
  • Guide Trunnion bolts
  • Support Trunnion bolts
  • Shell plate
  • Rotor Angle
  • T-Bar
  • Rotor Sealing Angle
2. Seals
  • Rotor Post Seals
  • Radial Seals – Hot End and Cold End
  • Axial Seals – Hot End and Cold End
  • By pass seals – Hot End and Cold End


3.Heating Elements
  • Hot End Sacrificing Heating Elements
  • Hot End Heating Elements
  • Hot Intermediate Heating Elements
  • Cold End Heating Elements



4. Connecting Plate Assembly
  • Hot End connecting panel
  • Cold End connecting plate
  • Hot End main centre section
  • Cold End main centre section
  • Hot End primary centre section
  • Cold End primary centre section
  • Hot end tracking spool assembly
  • Hot end stationary spool seal ring
  • Inboard packing retainer assembly
  • Cold end static spool assembly
5. Sector Plate assembly
  • Hot End Sector plate
  • Cold End sector plate
  • Static seals – Hot End and Cold End
  • Sector plate adjustor assembly
  • - Inboard tracking rod assembly
  • - Outboard adjustor rod assembly




6. Axial Seal Plate Assembly
  • Axial Seal plate
  • Axial seal plate static seals
  • Adjustor rod assembly
  • Axial seal plate to sector plate seal.







7. Guide Bearing Assembly
  • Guide bearing housing
  • Housing sleeve
  • Guide Trunnion Shaft
  • Guide Trunnion Sleeve
  • Adaptor sleeve
  • Guide bearing with lock nut
  • Guide bearing air seal assembly



8. Support Bearing Assembly
  • Support bearing housing
  • Support Trunnion shaft
  • Adaptor Plate
  • Support bearing housing bolts
  • Support bearing
  • Support bearing housing cover
  • Water shield assembly
  • Support Bearing Air sealing assembly

9. Rotor Drive
  • Pin rack assembly
  • Pin rack pins
  • Gear Box assembly
  • Air motor
  • Fluid coupling
  • Bibby coupling
  • Oil seals
  • Over running clutch
  • Taper lock bush
  • Worthington Hub
10. Oil Circulating System
  • Guide Bearing lube oil skid
  • Support bearing lube oil skid





11. Cleaning Device
  • Soot blower assembly
  • Soot blower nozzle
  • Twin nozzle adaptor
  • Soot blower lance tube
  • Speed reducer
  • Worm Gear Housing
  • Barco Swivel Joint
12. Wash Pipe&Deluge Assembly
  • Wash pipe assembly
  • Deluge pipe assembly
  • Wash pipe nozzle
  • Strainer