Improving the Bottom Ash and Fly Ash Evacuation

1

Achyut ChandraB.Tech Mechanical and Automation Engineering + MBA

Agenda

Organizational overview

Plant ParametersAsh Handling

System

Approach towards problems

faced and learn the

advancements employed

Improvements / Enhancements

suggestedConclusion

2

Founded in 1911, India’s largest power company with significant international presence

Total installed generation capacity of 8521 MW in India

Significant extensions in Alternate Energy resources

Thermal power plants- Trombay (Mumbai), Mundra (Gujarat), Jojobera and Maithon in Jharkhand, Haldia (West Bengal) and Belgaum (Karnataka); Current report on Mundra UMPP

Government of India , in agreement of ‘Power to all by 2012’ , initiated the concept of UMPP’s in 2005

3

4

Plant Overview

5

Ash Handling System- BAHS & FAHS• Collection, Handling and Disposal of Ash

6

Bottom Ash Handling System

7

Fly Ash Handling System

8

BA- Problems encountered & Advancements done

Clinker formations

Slagging of furnace

walls

Delay in evacuation

9

FA- Problems encountered & Advancements done

Lump formations

Passing's and leakages

Drop in Vacuum, Pressure

10

Improvements Suggested for Bottom Ash

Introduction of pulverisers adjacent to the slurry sump

11

Introduction of a series of clinker grinder

Manual evacuation of clinkers using detachable bins

Continual Preventive maintenance

12

Improvements Suggested for Fly AshChange in rotary feeder and discharge line design

Concretization of the Silo area for faster evacuation

Continual Preventive maintenance

13

𝑁1

𝑁2=

𝑇2

𝑇1

Conclusions

• Safety is a priority

• Increased coal prices , leading to coal blending

• Design coal v/s Actual coal

• Abnormalities in Ash Handling System

• Better engineering solutions to a

14

Comprehensive

Efficient

Ethical

15