comparison between yilun and p84 - albarrie - home
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Evonik Fibres GmbHPage | 2
Operating Experience - P84 and Chinese
PI fibres in the same Baghouse
Cement Kiln/Raw Mill Filter Sichuan 3200 tpd
• 4536 bags (130mm x 5200mm), 9629 m²
• A/C ratio: 0,96 m/min
P84® in operation for 7 years (2006-2013)
• Dp stable @ 6-7 mbar during the entire bags life
• Emissions < 10 mg/Nm3 during the entire life
• Low total costs and almost 100% availability of the bag house.
PI CN installed in 2013
• Dp increased from 6 mbar to 8-10 mbar within 2 years due todust penetration
• Additional costs of RMB 500.000 in comparison to P84 during thefirst 2 years (app. 20% of the costs of a set of bags – more thaninitial savings on the bag costs)
• Expected life <<7 years (Dp and emissions will become limiting)
www.P84.com
Italcementi FTR – Calusco Italy
Main features of IFTR:
Installed on a cement plant
Kiln / Cooler FF - Coanda nozzles for HPLV cleaning
Multi-compartment FF (10);
IFTR with 2 test lines with dedicated fans and flow rate controller;
Heat tracing included;
Automatic valves on gas return to automatically isolate the lines
Reduced numbers of curves
Return line in the clean gas chamber – smaller fans
ΔP measured in the bags cover boxes for maximum accuracy
Calibration tests started recently
www.P84.com
Schematics of the Filtration Test Rig
Bag Filters in
Baghouse
Seperate cleaning
for test bags
Seperate Fans for test bags
Flow Control
Pressure,
Temperature
Recording
www.P84.com
Test 3: P84 vs Chinese PI
1. Bag 1 P84
2. Bag 2 Chinese PI
New test bags for Test 3 were installed during the September 2015 outage:
1. P84 130 l/(dm2 min) @ 200 Pa
2. Chinese PI 140 l/(dm2 min) @ 200 Pa (Yi felt Z08Z41-000-5/0)
Ageing procedure applied for Test 3:
• 2000 cleaning cycles, at 2.2 bar and 1.2 m/min filtration velocity
www.P84.com
Test 3: Operating Parameters
Ageing: 2000 cleaning cycles at 2.2 bar pulsing pressure
and 1.2 m/min filtration velocity (06-10/11/2015)
Actual Test (11/11 – 23/11/2015, off line, 26/11 - 01/12/2015)
Pulse pressure: 3.2 bar
ΔP control mode: 1.0 kPa – 1.1 kPa
Filtration velocity: 1.04 m/min
Equivalent flow: 140 m3/hour
Pulse time: 100 ms
Min time between pulses: 10 sec
Max. no. of pulses (trip): 10
www.P84.com
0
200
400
600
800
1000
1200
1400
60000 60500 61000 61500 62000 62500 63000 63500 64000 64500 65000
Dp
[Pa]
daytime [s]
Bag1
Bag2
Pressure Drop Before Ageing
www.P84.com
FV: 1.04 m/min
Pulse P: 3.2 bar
ΔP: 1.0 - 1.1 kPa
Test Parameters
Test 3: Results – P84 vs Chinese PI
0
20
40
60
80
100
120
140
160
180
200
1 2 3 4 5 6 7 8 9 10 11 12 13
Pulses
/ day
P84
Chinese PI
www.P84.com
0
200
400
600
800
1000
1200
1400
10000 10500 11000 11500 12000 12500 13000 13500 14000 14500 15000
Dp
[Pa]
daytime [s]
Bag1 18.11.15
Bag2 18.11.15
Pressure Drop after Ageing
Bag 1 = P84
Bag 2 = chinese PI
www.P84.com
2 X BAGS - BAG FILTER ΔP POWER CONSUMPTION / COST COMPARISON
Bag House
Bag Type (surface) Yilun P84
Average Pressure Drop (ΔP) kPa 0,88 0,713
Actual Volume Flow m3/s 167 167
Fan effciency (typical) % 80 80
Motor effciency (typical) % 94 94
Drive efficiency (typical) % 85 85
Power consumption KW 229,5 185,9
Power Consumption per day (24 hrs) kW*h 5508 4463
Power Consumption per year (8000hrs) kW*h 1834159 1486086
Price of power Euro / kW*h 0,06 0,06
total fan power costs per year €/a 110.050 € 89.165 €
Power cost difference / year Euro / year 20.884 € 23%
Energy Consumption and Cost Comparison
www.P84.com
Pressurized Air
Bag House
Bag Type P84 Yilun
Barometric pressure mbar 1013 1013
Pulse tank pressure bar (g) 4 4
Absolute pressure bar (abs) 5,0 5,0
Pulse valve size 2 1/2" 2 1/2"
Flow coefficient (Kv) - [20oC & 101.3
kPa] Nm3/ hour 70,3 70,3
Pulse time ms 200 200
Volume per pulse - [20oC & 101.3 kPa] dm3 (litre) 148 148
Number of bags per bag house 3300 3300
Number of bags per pulse pipe 20 20
Number of pulse valves per bag house 165 165
Pulse rate / bag (FTR)
pulses /
hour 2,875 5,83
Total air consumption - [20oC & 101.3
kPa] m3/hour 70,1 142,1
Power consumption / hour KW 9,7 19,6
Power consumption /day KW 232,2 470,9
Price of power
Euro / KW
hour 0,06 0,06
Power cost / day Euro 14 € 28 €
Power cost / year (90% availability) Euro 4.577 € 9.281 €
Power cost difference / year Euro -4.704 € 49%
www.P84.com
Pay Back Time of the P84 Bags
P84 Yilun Difference
Bag Investment [€/m²] 20 16 20%
Investment costs [€] 200000 160000 40000
Annual Fan Power Costs [€] 89165 110050
Annual Pressurized Air Costs [€] 4577 9281
93742 119331 25589
Pay Back Time [years] 1,56
Assumptions
Plant Size: 10000m²
www.P84.com
Test 3: Conclusions – P84 vs Chinese PI
The P84 filter bag performed better than the Chinese PI material
The number of pulses required to maintain the ΔP within the pre-set
range (1.0 – 1.1 kPa for both bags) was found to be about 25% lower for
the P84 bag.
The mean Dp for the P84 bag is approx. 23% lower than the mean Dp of
the Yilun bag. This results in a 23% power saving
Power saving in fan power and pressurized air consumption lead to a
payback time of just 1,6 years based on a price difference of 20%
between P84 and Chinese PI
Examples from the industry show that the superior filtration performance
of P84 also leads to a longer bag life
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