Practical Solutions to Air Pollution Control Challenges
Practical Solutions to Air Pollution Control Challenges
Practical Solutions to Air Pollution Control Challenges
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<strong>Practical</strong> <strong>Solutions</strong> <strong>to</strong> <strong>Air</strong> <strong>Pollution</strong><br />
<strong>Control</strong> <strong>Challenges</strong><br />
By Weerasak Suthapong<br />
email address: wsuthapong@nalco.com<br />
CLEANER COAL<br />
WORK SHOP<br />
Aug 18-21,2008<br />
Ha Long City , Vietnam
“Cradle <strong>to</strong> Grave” Approach<br />
DRY MULTI- POLLUTIONS<br />
REDUCTION<br />
EMISSION REDUCTION<br />
& COMBUSTION ENHANCEMENT
What are the components of<br />
the technology?<br />
Integrated approaches that<br />
complement each other<br />
– ROFA ® – Rotating Opposed Fire <strong>Air</strong><br />
• Induced turbulence and rotation for<br />
superior mixing <strong>to</strong> reduce NOX, SO3,<br />
CO, PM and fly ash LOI<br />
– ROTAMIX ®<br />
• Rotary mixing of chemicals and or<br />
additional fuel <strong>to</strong> optimize NOx<br />
reduction<br />
– ROFA ® FSI<br />
• Superior mixing of chemicals <strong>to</strong><br />
capture SO2, SO3, mercury
ROFA – Rotating Opposed Fire<br />
<strong>Air</strong><br />
• High velocity air from a boost fan is<br />
introduced in<strong>to</strong> the boiler through ROFA<br />
boxes<br />
• ROFA boxes – placed asymmetrically<br />
Confidential and Proprietary<br />
Information<br />
4<br />
4
ROFA<br />
Confidential and Proprietary<br />
Information<br />
5<br />
5
ROFA Box<br />
Confidential and Proprietary<br />
Information<br />
6<br />
6
Mixing
Advantages of the<br />
technology<br />
• Brings practicality <strong>to</strong> environmental<br />
compliance strategies<br />
– Offers practical NOx, SOx, CO, fly ash<br />
LOI and mercury solutions<br />
• Low capital cost<br />
• Low operating cost<br />
• Flexible<br />
– Fuel<br />
– Incremental investment<br />
– Future regula<strong>to</strong>ry change<br />
– Least amount of downtime<br />
– Maximizes the efficiency of current<br />
assets<br />
• Reduces CO 2 generation<br />
8
ROTAMIX – 3 rd Generation<br />
SNCR<br />
• High velocity air<br />
• High kinetic<br />
energy promotes<br />
chemical mixing<br />
• Better chemical<br />
utilization reduces<br />
costs<br />
• Better NOx<br />
reduction than<br />
other SNCR<br />
systems<br />
Confidential and Proprietary<br />
Information<br />
9
ROTAMIX<br />
Injection Port<br />
Blowers<br />
Confidential and Proprietary<br />
Information<br />
10
NOx Technologies<br />
• ROFA<br />
– Boosted OFA<br />
– 50% - 65% NOx reduction<br />
• Rotamix (urea)<br />
– SNCR system<br />
– 72% - 82% NOx reduction<br />
• SCR<br />
– Small In-Duct Catalyst<br />
– 80% - 90% NOx reduction<br />
Step one<br />
Step two<br />
Step three<br />
11
ROFA FSI<br />
Furnace Sorbent Injection<br />
• SOx<br />
• Mercury<br />
Uses ROFA mixing <strong>to</strong> effectively<br />
introduce furnace sorbents<br />
(chemicals)<br />
Confidential and Proprietary<br />
Information<br />
12
SOx Technologies<br />
• Furnace Sorbent Injection<br />
(FSI) Step one<br />
– Injection Lime / Hydrate /<br />
Limes<strong>to</strong>ne in the Furnace<br />
– 50% - 75% SOx reduction<br />
13
Conventional Add-On <strong>Pollution</strong> <strong>Control</strong><br />
30 Yr old Plant<br />
Nalco Mobotec’s low capital<br />
integrated solution for NOx, SO 2<br />
and Hg<br />
Add-on Wet<br />
SO2 Scrubber<br />
+SCR<br />
2007<br />
70- 100% Increase in capital employed<br />
Original<br />
Generating Plant<br />
1974<br />
Nalco Mobotec<br />
Integrated <strong>Pollution</strong> <strong>Control</strong><br />
8- 12% Increase in capital employed<br />
Original<br />
Generating Plant<br />
No Add-on Wet<br />
SO2 Scrubber<br />
or SCR Required<br />
14
The MagMill Technology<br />
DRY MULTI- POLLUTIONS REDUCTION<br />
To Burner<br />
Mill Feed<br />
Clean Coal<br />
• Dry magnetic separation technology<br />
which combines the existing pulverizer<br />
with a magnetic separa<strong>to</strong>r<br />
Pulverizer Mill<br />
Separa<strong>to</strong>r<br />
• Remove mineral contaminants from coal<br />
more efficiently and economically<br />
MagMill Reject<br />
• Offers retrofit opportunity <strong>to</strong> change the<br />
design of new coal combustion or<br />
gasification plants which will have lower<br />
capital and operational costs.
MagMill<br />
Technology<br />
Advantages<br />
Removes<br />
abrasive minerals<br />
No water<br />
No additives<br />
Rapid<br />
coal quality<br />
control<br />
Granular waste<br />
Benefits<br />
Mill<br />
Reduces wear &<br />
power draw<br />
Burners & Boilers<br />
Reduces slagging<br />
Less water wall wastage<br />
Pollutants<br />
Reduces sulfur<br />
Reduces mercury<br />
Less arsenic <strong>to</strong> SCR<br />
Plant<br />
Increases generation<br />
Lowers pollutants<br />
Lowers costs
Ash & Sulfur Reductions, Lb/MBtu %<br />
8 × 100 Mesh Cholla Coal<br />
40<br />
5<br />
4<br />
30<br />
3<br />
Ash<br />
20<br />
10<br />
Ash<br />
Sulfur<br />
2<br />
1<br />
SO2<br />
0<br />
70 80 90 100<br />
Btu Recovery, %<br />
0
Ash & Sulfur Reductions, Lb/MBtu %<br />
8 × 100 Mesh Lee Ranch Coal<br />
20<br />
25<br />
Ash<br />
15<br />
10<br />
Ash<br />
Sulfur<br />
20<br />
15<br />
10<br />
SO2<br />
5<br />
5<br />
0<br />
75 80 85 90 95 100<br />
Btu Recovery, %<br />
0
NALCO MOBOTEC<br />
• THANK YOU<br />
• QUESTIONS<br />
19
Change language