Transcript No Slide Title

A and W
TECHNOLOGIES
BOILER TRAINING
Mr. Customer – Site specific
Plant Cost Factors
per 1000 lbs. Steam
Fuel 74.9%
Labor 10.0%
Chemicals 0.5%
Water 0.8%
Equip Deprec
9.8%
Electricity
Sewer 1.5%
2.5%
Energy Loss Versus Scale Thickness
Energy Loss (%)
7
6
5
4
3
2
1
0
1/64
1/32
3/64
1/16
Scale Thickness (Inches)
Iron & Silica
High Iron Content
"Normal" Scale
Firetube Boiler
Water rises near
the tubes and falls
along boiler walls
Heat
WATER TUBE BOILER
Steam
Steam Drum
Risers
Risers
FIRE BOX
Downcomers
Mud Drum
Water and its Impurities
• pH
• M Alkalinity
• Chlorides
• Calcium
• Magnesium
• Total Hardness
• Phosphate
• Silica
• Iron
•Conductivity
8.0
100 ppm
12 ppm
75 ppm
30 ppm
105 ppm
.1 ppm
5 ppm
.05 ppm
230 mmhos
H2 O
Typical Boiler System
Condensate
Returned
Deaerator
FW pump
Condensate
Lost
Process
Steam
:
Boiler
Softeners
Blowdown
Makeup
Softeners (Sodium Zeolite)
Deaerator
FW pump
:
Softeners
Makeup
Softener Service Cycle
Hard
105 ppm hardness
Soft
0 ppm hardness
How It Works?
Water Drop
Resin Bead
Ca+
Mg+
Ca+
Na+
Mg+
Na+
Na+
Na+
Na+
Resin Bead
Na+
Na+
Water Drop
Softener Backwash Cycle
Softener Brining Cycle
salt
solution
Softener Slow Rinse Cycle
Softener Fast Rinse Cycle
Softener Service Cycle
Hard
Soft
Deaeration
Deaerator
FW pump
:
Softeners
Makeup
Deaeration
DEAERATING
SECTION
STORAGE
SECTION
5psig 222 F
Deaeration
TRAYS
STORAGE
SECTION
5psig 222 F
Deaeration
Steam
Inlet
STORAGE
SECTION
5psig 222 F
Deaeration
Condensate
Return
Soft
Makeup
Steam
STORAGE
SECTION
5psig 222 F
Deaeration
Vent
Condensate
Return
Soft
Makeup
Steam
STORAGE
SECTION
5psig 222 F
To Feed Water Pumps
Solubility of Oxygen in Water
20
18
16
14
ppm
Oxygen
12
10
8
6
4
2
ppb range
40
60
80
100
120 140
Temperature
160 180
*F
200
220 240
Typical Chemical Feed Points
Deaerator
Steam
Sulfite
Feed
CONT.
Boiler
Typical Chemical Feed Points
Deaerator
sample point
Feedwater
Steam
Boiler
Trt.
fed by FW
pumps on
Boiler
Sample
Point
Boiler water
Typical Chemical Feed Points
Sample Point
Deaerator
Steam
Boiler
Condensate
Feed Point
Alternative
A and W
Chemical Feed
Hands free & Bulk
TECHNOLOGIES
AWB
Deaerator
AWB
Liquid Sulfite
Softeners
AWB
AWB
AWB
AWB
Internal
Treatment
To steam
header
Amine
Alkalinity
Bulk containers with product
directly injected as noted.
TESTING - SOFTENER
Deaerator
SOFTENER TESTING
• Hardness
:
Sample Point
Softener
Softeners
Makeup
0-1 ppm
TESTING - FEEDWATER
Deaerator
sample point
Feedwater
FEEDWATER TESTING
• Hardness
0-1 ppm
TESTING - BOILER WATER
BOILER TESTING
Sample
Point
Boiler water
• Conductivity
Neutralized
• Alkalinity
• Sulfite
4500 max
2000-3000
600-900
30-50
Image Industries Condensate Study
11
10
Main C.R.
pH Value
9
Wash C.R.
8
Line 1 LPHX
7
Line 2 LPHX
6
5
4Feb
914Feb Feb
19Feb
Product Usage
701
2 Gal
705
157
2 Gal
157 L-1 Sat.
157 L-2 Sat.
Cost per day all treatm ent
$124/day
24- 1-Mar 6-Mar 11Feb
Mar
1.5 Gal
16Mar
1 Gal 2 Gal
1.5 Gal
21Mar
26Mar
31- 5-Apr 10Mar
Apr
1.5 Gal
1.25 Gal 1 Gal
2.5 Gal
.5 Gal
1.5 Gal
$123/day *
$116/day
* Protection for line 1 LPHX
^ Protection for line 2 LPHX (Both)
15Apr
$72/day ^
20Apr
TESTING - CONDENSATE
Sample Point
Deaerator
TESTING
• pH
• Conductivity
• Hardness
• Alkalinity
6.5 – 7.2
Record
0
0
Boiler Blowdown
Surface
Blowdown
Bottom
Boiler Blowdown
Needle
Valve
Surface
Boiler Blowdown
Auto
Blowdown
Surface
Steam System
A and W Blowdown Controller
Timed Sample Method
A and W
Controller
Sampling electrode
Full ported
gate valve
Throttling
needle valve
cross
Max. 4’
Max 3’
110 VAC
Flush valve
Motorized ball valve.
Mount horizontally away
from heat, as near to floor
as possible.
To drain or cascade to
other boiler.
A and W
TECHNOLOGIES
Save some money and keep the boiler hot
Boiler System
A and W Cascading Blowdown
On Line Boiler
Flashed steam
Boiler in Hot Wet Storage
Open
Open
Closed
Closed
Check
Valve
Open
Boiler Bottom
Blowdown
Blowdown
Flash
Tank
Closed
Boiler Bottom
Blowdown
Drain
Cascading blowdown from an operating boiler is
used to keep the idle boiler filled with treated water
and hot ready to bring on line. Insure idle boiler vent
is open to completely fill boiler then close vent and
allow blowdown to exit through the surface blowdown
to the blowdown flash tank.
A and W
TECHNOLOGIES
Thank you for your business
A and W
TECHNOLOGIES