Examples of Fuel switching
Transcript of Examples of Fuel switching
Examples of Fuel switching
IGU WOC5 SG5.1 meeting
Tokyo, Japan
April 19th, 2007
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Index
Y steel Co.,Ltd(Ladle pre-heater)
Efficiency improvement with re-generative burner.
Senboku heat treatment Co.,Ltd
Quality and efficiency improvement with combustion and internal pressure control.
Nagahashi dyeing Co.,Ltd(Boiler)
Space saving with compact one-through boiler. Flash steam recovery system
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1.Y steel Co.,Ltd
Ladle size:φ4,090×3,590LLadle capacity:130t(melted metal)temperature:1,000~1,100℃burner:785-P(200ℓ/h)
×1・・・heavy oil↓
Twin re-generative burnerTREG-1700K(150m3/h)×1
・・・Natural gas
Temperature Control:manual・・・heavy oil
↓proportional control
specifications
Ladle pre-heater
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1-1. ladle pre-heater
electrode
Fuel-oxygen burner
Car transfer machine
Re-generative burner 1700K
Melted metal
Cutter
billet④ continuous casting
burner
move
scrap
① Arc furnace
③ Tundish
ladle(130t/ch)
② ladle pre-heater
1000~1100℃
1000~1100℃
130t/ch
ladle(130t/ch)
tundish
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1-2. Ladle pre-heater appearance
Heat exchanger Ladle stand and burner
burner
ladle
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1-3.Comparison with the previous one
previous present
burner capacity 2,070kW 1,700kW
Processing time 3.5h 2.45h
Exhaust gas temp 1,136℃ 263℃
Energy saving base line 57%
Installation cost base line 100,000euros
Annual profit base line 25,000euros
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2.Senboku heat treatment Co.Ltd
type : car transfer annealing furnace
capacity : 120t/chdimension:4,000W×13,000L×3,500Hburner : PLB-3EL×18 ・・・・kerosene
↓
temperature: 600~950℃
LC-400K-S×9・・・natural gas(3-zone impulse combustion)
specifications
The appearance of the furnace
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2-1.Impulse combustion system
Ⓐ
Ⓑ
Ⓒ
Ⓓ50%50%
50%50%
Ⓐ Ⓑ
Ⓒ Ⓓ
100%
0%
0%
100%
Ⓐ Ⓑ
Ⓒ Ⓓcyclecycle
ON ON
ON
ON
ON
ON
ON ON
ON ON
Typical one Impulse combustion Time table(50%)
①Two position control : stirring furnace atmosphere
②Unique time table : minimizing temperature distribution
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2-2.furnace and burner
Car transfer unit Burner and peripheral devices
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2-3.Energy saving and high quality
burner
burner
Previous one Present one
steel
Car
piers
steel
Car
Brick walls
Invasion air Invasion air
Pressure control damper
Invasion air Invasion air
X X
①Pressure control damper : preventing invasion air
②removing brisk walls : stirring furnace atmosphere
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2-4.Furnace atmosphere
Previous one
Temperature distribution:50℃
Present one
Temperature distribution:10℃
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2-5.Comparison with the previous one
previous present
burner capacity 5,400kW 3,600kW
Temp distribution 50℃ 10℃
Energy saving base line 20%
Installation cost base line 170,000euros
Annual profit base line 21,250euros
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3.Nagahashi dyeing Co.,Ltd
specifications
Factory appearance
・boiler : replaceheavy oil・furnace pipe fire-tube boiler:8t/h・One through boiler : 4t/h
Natural gas・One through boiler : 12.5t/h・Flash steam recovery system
・Gas fired dyeing machineSwitching LPG to Natural gas
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3-1.space saving (by 40%)
One-through boiler 2t/h
Oil tank
Fire-tube boiler4t/h
One-through boiler 2.5t/h×5
10
m
10
m
13.8 m 13.8 m
Fire-tube boiler4t/h
One-through boiler 2t/h
Previous one Present one
9.2m
9m
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3-2.boiler appearance
Previous one Present one
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3-3.previous system
boilerSteam header
Ste
am
eq
uip
men
t
Ste
am
equip
ment
Ste
am
equip
ment
condensate
pressure regulator
Flash steam
2㎏/㎠G
Steam trap
Steam trap
Steam trapcondensate
8㎏/㎠G
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3-4.flash steam recovery system
boilerSteam header
Ste
am
eq
uip
men
t
Ste
am
equip
ment
Ste
am
equip
ment
condensate
pressure regulator
Flash steam
2㎏/㎠G
Steam trap
Steam trap
Steam trapcondensate
Fla
sh
tan
k
8㎏/㎠G
ejector
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3-5.appearance of recovery system
Pressure pump
Flash tank
Flash steam pipe
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3-6.factory appearance
Under construction Present factory
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3-7.Comparison with the previous one
previous present
Space saving base line 40%
Energy saving base line 18%
Installation cost base line 500,000euros
Annual profit base line 71,500euros
CO2 reduction base line 602t/year