ash handlingash handling system system
DESCRIPTION
a brief overviewTRANSCRIPT
![Page 1: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/1.jpg)
Ash Handling SystemWhat are the types of Ash in Thermal Power Plant ?
Bottom Ash
Fly Ash
http://studygalaxy.com/
![Page 2: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/2.jpg)
Bottom AshThe 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.
![Page 3: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/3.jpg)
Fly AshIt is collected from :-1-ESP hoppers2-Air preheaters hoppers3-Economiser hoppers
It is 80% of total ash.
![Page 4: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/4.jpg)
Wet systemIn this system ash conveying
media is water.It has two main component:-
1-Hydro-vactor2-Hydro-ejector
![Page 5: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/5.jpg)
Hydro-vactorWorking 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.
![Page 6: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/6.jpg)
![Page 7: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/7.jpg)
Hydro-ejectorWorking Principle:-
High pressure water jet carries slurry from the bottom to slurry sump.
This system operates once in a day (24 hrs).
![Page 8: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/8.jpg)
![Page 9: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/9.jpg)
Final disposal of slurryFinally slurry from slurry sump is
conveyed by pair of big centrifugal pumps to Ash ponds.
This slurry system is common –1-for D & E station2-for C & F station
![Page 10: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/10.jpg)
![Page 11: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/11.jpg)
Fly Ash in Forestry
Ash pond No –1
![Page 12: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/12.jpg)
Fly Ash in Forestry
Ash pond No –1
![Page 13: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/13.jpg)
Fly Ash in Forestry
Ash pond No –2
![Page 14: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/14.jpg)
Different Auxillaries in wet system (‘F’station)
1-H.P. pump 3 Nos. 11 kg/cm2
2-L.P. pump 3 Nos. 6 kg/cm2
3-Ash slurry pump 3 Nos. in each path 2.5 kg/cm2
4-Air washer pump 2 Nos. 5 kg/cm2
5-Seal water pump 2 Nos. 18 kg/cm2
![Page 15: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/15.jpg)
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.
![Page 16: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/16.jpg)
Components of dry system
K-pumpP.D.pumpCentac compressorAcher silo
![Page 17: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/17.jpg)
K-pumpIt is nothing but the combination of
silo,Transfer vessel,Dispencing vessel &
Centrifugal compressor.D & E station has common K-pumpC & F station has another common
K-pump.
![Page 18: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/18.jpg)
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.
![Page 19: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/19.jpg)
![Page 20: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/20.jpg)
Acher SiloFinally Dry ash is disposed to acher
silo which is located in AEC campus.
These are 2 in nos.
Each has capacity of 750 ton .
![Page 21: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/21.jpg)
INTEGRATED FLY ASH HANDLING SYSTEM: (Schematic flow diagram)Stage- I
C stn. F stn.Fly ash Fine Ash Fly ashHoppers Silo (New) Hoppers
130 Cu.Mtr.( 'C' stn)
30 TPH
(After rehibilitation) Stage-II 80 TPH
80 TPH
Stage-I
Fine AshSilo (New) E stn. D stn.
130 Cu.Mtr. Fly ash Fly ash('D/E' stn) Hoppers Hoppers
80 TPH
80 TPH
Stage-II 80 TPH
To final ash disposal area by closed tanker / truck
Exist.Recip Compr Compr.
FINAL FLY ASH STORAGE SILO AT
ACHER
Capacity : 750 Cu.Mtr.
FINAL FLY ASH
STORAGE SILO AT ACHER
Capacity : 750 Cu.Mtr.
Stage II CentrifugalCo
mpr.
C 1 Existing Silo
(Cap:350 T)
F stn. Intm.
Hopper
D/E Exist. RCC Silo
(Cap :450 T)
Stage I Centrifugal
Compr.
Stage I Centrifugal
Compr.
Stage II Centrifugal
Compr.
![Page 22: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/22.jpg)
Loading of trucks & tankers at acher
There are 2 system of loading :-
1-For truck - water spray system2-For tankers – by gravity
![Page 23: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/23.jpg)
Dry Ash unloading at Acher
Ash collection in closed tanker at Acher silo
![Page 24: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/24.jpg)
Dry Ash unloading at Acher
Ash collection in closed tanker at Acher silo
![Page 25: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/25.jpg)
Use of Fly AshFor building constructionFor Cement manufacturingFor bricks manufacturing Ash customers:-1-Gujrat ambuja cement2-Binani cement, laxmi cement3-GCL (RCC pipe mfg.)
![Page 26: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/26.jpg)
Fly Ash used in Bldg. Mat.
Private Private Private Bungalow Gadhinagr
![Page 27: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/27.jpg)
Fly Ash used in Bldg. Mat.
Ghodasar Shriji Complex
![Page 28: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/28.jpg)
Ash used in RCC road Construction
RCC road near D.M. Plant area
![Page 29: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/29.jpg)
Ash used in RCC road Construction
RCC road from Crusher house to Coal JN - M
![Page 30: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/30.jpg)
Future strategiesNow 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.
![Page 31: Ash HandlingAsh Handling System System](https://reader036.vdocuments.us/reader036/viewer/2022081417/5695d1321a28ab9b02958d88/html5/thumbnails/31.jpg)