i^Procyon Consulting Inc.
Cover Story damper control. "With the TYPE K damper drives, the stability of emission reductions improved tremendously," reports McLellan. "Before, the process used to wander around a lot. Essentially, we run at approximately 7% excess air, so plus or minus 1.5% meant you could swing from 5.5 to 8.5%. But now, repeatability is on the order of 0.1 to 0.25% - a big im provement. I also expect the TYPE K to perform well for a long time, as it has a lot of robust features. Eor instance, it has an energized seal with stainless steel backing fingers and a lowfriction coated interior, so there will be very low wear on the actuator. Additionally, air pressure is applied to both sides of the vane,so there is no backlash. The positioner basically holds the damper at desired set point without drifting." Improved damper drive performance is significant for refineries The successes realized at some plants across North America mean that other refineries can meet their emission targets by improving their damper drive elements. More important,the retrofitting of other control strategies doesn't necessar ily have to be a financial drain on petrochemical operations.
With NOj^ reduction deadlines drawing ever closer, opera tors of refineries and petrochemical plants can derive some benefit from their efforts to reduce emissions. The installation
of modem damper control can actually improve product qual ity and safety levels, while lowering maintenance expenses and on-site man hours,even for those plants located outside ofnonattainment zones. This type of "payback" casts the whole is sue of emissions reduction into a much better light. For more information, circle reply card No. 157
►— Ke<^i4tened to- ...
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M.RilMI ...
► Management ^
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Consultants ^
Our Consultants will:
♦ Direct implementation ♦ Train Staff ♦ Document Procedures
♦ Provide Gap Analysis ♦ Conduct Audits Since 1991, our certified Quaiity and Environmental Consultants have been assisting organizations achieve registered quaiity and environmental management systems. We go to you, customize our service to satisfy your requirements and work closely with your staff to ensure complete understanding and conformance to the International Standards.
Certified by ANSI-RAB, IQA
238 Hickling Trail, Barrie, Ontario L4M 5W5 705-739-9738
Fax: 705-739-8448
www.procyon.ca
For more information, circle reply card No. 158
NEW DEPOLOX® 3 plus ANALYZER TOTAL CHLORINE RESIDUALS WITHOUT REAGENTS
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The Wallace & Tlernan Products Depolox® 3 plus residual analyzer measures total chlorine in drinking water applications. Its unique, internally buffered sensor eliminates the need to use reagents in samples with varying pH. Just add the sample back into the supply, there's no need to drain. Tailored measuring ranges are available from 0-0.2 mg/1 to 0-20 mg/1. Economical and versatile, the Depolox 3 plus may also be used to measure free chlorine residuals, fluoride
residuals or pH. Call Wallace & Tlernan Products today at (905) 944-2800. Or visit our website at www.wallaceandtiernan.usfilter.com.
.Vivendi
water company
Environmental Science & Engineering, May 2002
For more information, circie repiy card No. 159
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