Nozzles are Key to Efficiency – Hot Topic Yesterday
Nozzles are important in DeSOx and DeNOx. Two leading companies provided information on the latest developments.
Mughis Naqvi and John Coulston of Lechler USA discussed types of spray nozzles used in SDA’s, CFB scrubbers as well as SCR and SNCR. The following chart shows types of nozzles used in each application.
Mike Bruno of BETE Fog Nozzle presented two Case Studies highlighting recent examples where integrated engineering design, development, testing and manufacturing resources met the customer’s specialized need for pollution-control process improvements. One example was improving SO2 removal efficiency for the following specifications:
Ø 200 MW subcritical pulverized coal
Ø 99 percent removal, normal
Ø 98 percent removal, upset
A dual orifice nozzle was developed to meet the needs. The results included no clogging of the nozzles as a large free passage is integral to the design and emissions testing during unit commissioning demonstrated target removal efficiency. The efficiency guarantee of this scrubber allowed the utility to move quickly through the early permitting process by offering to shut down two other smaller units with older scrubbers.
Another example involved NOx removal via SCR. The goal was optimizing performance by
placement of nozzles for efficient distribution and meeting droplet size targets.
The final product consisted of multiple standard spray tips on a specially designed head which provided
o Triple the flowrate with no increase in droplet size,
o A low profile which fits through the specified opening size,
o Spray tip orientation for maximum coverage without wall wetting, and
o Incorporation into a lance assembly.
The bios, abstracts and photos can be viewed as follows: BIOS, PHOTOS, ABSTRACTS - JANUARY 14, 2010.htm
The individual slides are located in our FGD Decision Tree as follows:
MIKE BRUNO – BETE FOG NOZZLE
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FGD Continuing Decision Process For: Products
Spray Nozzles for Air Quality Systems, presented by Mike Bruno, BETE. Hot Topic Hour January 14, 2010.
MUGHIS HAQVI – LECHLER NOZZLES
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FGD Continuing Decision Process For: Products
Lechler Engineered Spray Nozzles and Systems for Air Pollution Control. Presented by Mughis Naqvi, Lechler Nozzles, Hot Topic Hour January 14, 2010.