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Ash Handling System Presentation Transcript
1.Ash Handling System
What are the types of Ash in Thermal Power Plant ?
Bottom Ash
Fly Ash
What are the types of Ash in Thermal Power Plant ?
Bottom Ash
Fly Ash
2. Bottom Ash
The ash which is directly collected from bottom of boiler.
Bottom ash directly falls down in water filled bottom due to gravity.
Bottom ash is 20% of total ash.
The ash which is directly collected from bottom of boiler.
Bottom ash directly falls down in water filled bottom due to gravity.
Bottom ash is 20% of total ash.
3.Fly Ash
It is collected from :-
1-ESP hoppers
2-Air preheaters hoppers
3-Economiser hoppers
It is 80% of total ash.
4.Wet system
In this system ash conveying media is water.
It has two main component:-
1-Hydro-vactor
2-Hydro-ejector
It is collected from :-
1-ESP hoppers
2-Air preheaters hoppers
3-Economiser hoppers
It is 80% of total ash.
4.Wet system
In this system ash conveying media is water.
It has two main component:-
1-Hydro-vactor
2-Hydro-ejector
5.Hydro-vactor
Working Principle:-
Hopper ash is directly sucked by vaccum, which is created by high water
Jet (hydrovactor).
This ash mix with water in collecting tank and finally slurry collects in slurry sump.
Working Principle:-
Hopper ash is directly sucked by vaccum, which is created by high water
Jet (hydrovactor).
This ash mix with water in collecting tank and finally slurry collects in slurry sump.
6.Hydro-ejector
Working Principle:-
High pressure water jet carries slurry from the bottom to slurry sump.
This system operates once in a day
Working Principle:-
High pressure water jet carries slurry from the bottom to slurry sump.
This system operates once in a day
7.Final disposal of slurry
Finally slurry from slurry sump is conveyed by pair of big centrifugal pumps to Ash ponds.
This slurry system is common –
1-for D & E station
2-for C & F station
Finally slurry from slurry sump is conveyed by pair of big centrifugal pumps to Ash ponds.
This slurry system is common –
1-for D & E station
2-for C & F station
8.Fly Ash in Forestry
9.Different Auxillaries in wet system (‘F’station)
10. What is the need of dry system?
It has some good characteristics over the wet system:-
1-Huge quantity of water is saved.
2-Power consumption is less.
3-Reduction in surface pollution.
4-Earning, by selling dry ash to cement factory & bricks manufacturer.
It has some good characteristics over the wet system:-
1-Huge quantity of water is saved.
2-Power consumption is less.
3-Reduction in surface pollution.
4-Earning, by selling dry ash to cement factory & bricks manufacturer.
11. Components of dry system
K-pump
P.D.pump
Centac compressor
Acher silo
K-pump
P.D.pump
Centac compressor
Acher silo
12. K-pump
It is nothing but the combination of silo,Transfer vessel,Dispencing vessel &
Centrifugal compressor.
D & E station has common K-pump
C & F station has another common K-pump.
It is nothing but the combination of silo,Transfer vessel,Dispencing vessel &
Centrifugal compressor.
D & E station has common K-pump
C & F station has another common K-pump.
13. Working Principle of K- pump
It works on the principle of pressure difference.
It’s operation is sequential ,because Dome Valves from DV-1 to DV-6 operate in sequence.
It works on the principle of pressure difference.
It’s operation is sequential ,because Dome Valves from DV-1 to DV-6 operate in sequence.
14. Acher Silo
Finally Dry ash is disposed to acher silo
which is located in AEC campus.
These are 2 in nos.
Each has capacity of 750 ton .
Finally Dry ash is disposed to acher silo
which is located in AEC campus.
These are 2 in nos.
Each has capacity of 750 ton .
15. Loading of trucks & tankers at acher
There are 2 system of loading :-
1-For truck - water spray system
2-For tankers – by gravity
There are 2 system of loading :-
1-For truck - water spray system
2-For tankers – by gravity
16. Dry Ash unloading at Acher
17. se of Fly Ash
For building construction
For Cement manufacturing
For bricks manufacturing
Ash customers:-
1-Gujrat ambuja cement
2-Binani cement, laxmi cement
3-GCL (RCC pipe mfg.)
For building construction
For Cement manufacturing
For bricks manufacturing
Ash customers:-
1-Gujrat ambuja cement
2-Binani cement, laxmi cement
3-GCL (RCC pipe mfg.)
18.Future strategies
Now a days we are using almost dry system.
In future our planning is to stop whole wet system except bottom ash which is only 20%.
For loading trucks & tankers we are thinking about loading in night shift too.
Now a days we are using almost dry system.
In future our planning is to stop whole wet system except bottom ash which is only 20%.
For loading trucks & tankers we are thinking about loading in night shift too.
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