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Flue Gas Desulphurization (FGD) System

FGD Site
FGD Site

DB Power’s Flue Gas Desulphurization (FGD) system, ordered in 2019, demonstrates our commitment to clean energy. Using advanced wet limestone scrubbing technology, it reduces SO₂ emissions and ensures compliance with MoEFCC norms.

Key Unique Features

  • First-of-its-kind Absorber Top Chimney in the IPP sector.
  • Energy-efficient design with single booster fan & bypass duct.
  • Compact installation with minimal downtime.

Implementation Timeline

2019 – FGD System Ordered

Contract signed and engineering discussions initiated.

2020 – Design & Procurement

Design changes made to include absorber top chimney to save space and time. Absorber Top Chimney Initially the design was with existing chimney with glass flake lining, which has amended to absorber top based on proposal from EPC vendor due to less space availability & also to ensure scheduled time saving, No Outage time for Unit which in turn saving generation cost(2 Months time for application) & No outlet duct from absorber to chimney

By pass Duct & Damper To use the margin available with existing ID fan and also to ensure energy conservation single booster fan with bypass duct arrangement analyzed during design stage, Which is found suitable and cost saving measure in future.

Compact Design

Option -1 Use of separate chimney with borosilicate lining/Glass flake lining It has been seen separate chimney construction would have costly and time taking activity all together.

Option-2 Use of existing chimney with Glass flake lining-2 Months Unit shut down for application and FGD outlet duct connection.

Option-3 Opportunity among challenges is to go with Absorber top chimney which has overcome all the above mentioned challenges.

2021 – Civil & Structural Work

Construction of absorber, limestone slurry units, and booster fans began.

FGD Site
FGD Site
FGD Site
FGD Site
2022 – Major Equipment Installation

Absorber vessels, ducting systems, ID fans, booster fans installed.

FGD Site
FGD Site
FGD Site
FGD Site
FGD Site
FGD Site
FGD Site
FGD Site
2023 – Testing & Commissioning

Wet limestone scrubber commissioned with performance testing completed.

Milestone FGD

Project Commencement

Post Commissioning
Sl Activity Description Start Date Completion Date
1Unit-1 Trial Operation 72 Hrs10-Jan-202413-Jan-2024
2Unit-2 Trial Operation 72 Hrs26-Mar-202429-Mar-2024
3Unit-1 PG Test25-Oct-2024
4Unit-2 PG Test17-Jan-2025