AQ_F_0800107_20120212_CMPL_CompRpt

1836 Eastchester Dr.
eLLONS Suite 108
High Point, NC 27265
Energy Solutions Group 0:360.750.3583
F:360.750,3483
Mr. Frankie Fox
Operations Manager
Wellons Energy Solutions
232 Perdue Rd.
Cofield.NC 27922
Mr. Fox,
As required under the Air Permit No. 10126ROI for the W. E. Partners I1. LLC facility located at
Lewiston. NC. Wellons Inc.conducted boiler tuning on the boilers at the site. As you are aware. the
facility has three(3)600 HP biomass boilers installed at the facility.
I. with the assistance of Bruce Taylor. a boiler technician employed by the boiler manufacturer Wellons
Inc., conducted various trials with the boilers to minimize boiler emissions while maximizing the
efficiency of the combustion process. While the permit language requiring a boiler tune-up is more
directed toward a fossil fuel boiler,the summary of the requirements are outlined below.
i. Boiler Tune-up (10 CFR 63.11223) — An initial boiler tune-up is required upon
startup of the source. A biennial tune-up is also required and shall be conducted
no more than 25 months after the previous tune-up. If the unit is not operating on
the required date for a tune-up. the tune-up must be conducted within one week
of startup.The tune-up shall include the following:
A. As applicable. inspect the burner, and clean or replace any components
of the burner as necessary- (the Permittee may delay the burner inspection
until the next scheduled unit shutdown. but must inspect each burner at
least once every 36 months).
B. Inspect the flame pattern. as applicable. and adjust the burner as
necessary- to optimize the flame pattern. The adjustment should be
consistent with the manufacturer's specifications,if available.
C. Inspect the system controlling the air-to-fuel ratio, as applicable. and
ensure that it is correctly calibrated and functioning properly.
D. Optimize total emissions of carbon monoxide. This optimization should
be consistent with the manufacturer's specifications.if available.
E. Measure the concentrations in the effluent stream of carbon monoxide in
parts per million. by volume, and oxygen in volume percent, before and
w

after the adjustments are made (measurements mad be either on a dry or
yet basis. as long as it is the same basis before and after the adjustments
are made).
F. Maintain onsite a biennial report (in addition to the annual report
requirements of item f.iv. below)containing:
I. The concentrations of CO in the effluent stream in parts per
million, by volume, and oxygen in volume percent. measured
before and after the tune-up of the boiler.
II. A description of any corrective actions taken as a part of the
tune-up of the boiler.
III. The type and amount of fuel used over the 12 months prior to the
biennial tune-up of the boiler.
During the tune-up and commissioning process. several runs of test data were taken to determine the
current emissions profile as well as to develop a plan to minimize emissions by adjusting the air/fuel
ratios. An inspection of the boiler grate was completed an no issues were noted with the grate. furnace
and fuel delivery mechanisms.
Data documenting the 02 and CO emissions were taken before. during and after completion of the tuning
exercise. Please see attachment which documents the emissions profile.
As required by the Air Permit,.this tune-up will need to be repeated biannually going fonyard.Therefore,
we will need to schedule another tune-up to be completed prior to January, 2014.
Sincerely:
Garald B. Cottrell
President&General Manager
Wellons Energy Solutions LLC
v
2 P .:; f.

Summary of Tuning Data
Initial Results Prior to Tuning
Tuning Trials on Boiler,Lewiston,NC TuningTrlals on"N'Boiler,Lewiston,NC Tuning Trials on"C"Boiler,Lewiston,NC
Using New recipe called Recipe 75 Using New recipe called Recipe 75 Using New recipe called Recipe 75
Trial Change: Baseline testing. Trial Change:Baseline testing. Change:Baseline testing.
10:55 Comments: Appearsthatwe will need to reduce topoverfire with the new Comments: Trial I Comments:Not surprising,not CO was high.Tested all boilers using this recipe and
4"air line to the metering screw all were in the 1900-2000 range.
Firing Rate 70.9% 32.9 0 CO. 8.71% Faring Rate 83.4% 37.7 0 CO, 30.79A Fin ng Rate 98.01". 42.3 0 CO, 9.51A
Top Overtire im, 42.0% Excess Air 731h Overtire 42.3% 3 Excess Air 42% Overfire 54.3% 0 Excess Au 59%
Overtire 42.4% -1 CO 920.1100 UnderFire 38.3% 0 CO 1450-1550 UnderFire 43.6% 0 CO 19OD-2000
UnderFire 34.1% 0 O, 9.30% 02 computer 50A 0, 6.6.5t, 02 computer 6.8% 0_ 8.20%
02 computer 8.7% IDsetting -0.5 iDsetting -0.5
IDsetting -0.5
Results After to Tuning
Tuning Trials on"A"Boller,Lewiston,NC Tuning Trials on"B"Boiler,Lewiston,NC Tuning Trials on"C"Boller,Lewiston,NC
Using New recipe called Recipe 75 Using,New recipe called Recipe 75 Using,New recipe called Recipe 75
Trial Change: Baseline testing. Trial Change: Baseline testing Trial Change: Baseline testing
4:42 Comment EXCELLENT results 7:30 Comments: EXCELLENT results 4:42 Comments: EXCELLENT results
Finng Rate 69.71/6 32.5 0 CO: 10.7% Firing Rate 59.81/. 28.7 0 CO; 9.914 Firing Rate 63.71Po 32.5 0 CO; 10.7%
Metenngscrew,_ 100.O1A, Excess Air 43% Meten ng screw I N/A Excess Air 54% MetenngscrewA 10D.O-/ Excess Air 43%
Top Overfi re(m: 40.0% CO I50-165 Top Overfi re(ma 38.01/. CO 120-140 Top Overfi re(mai 40.0% CO 150-165
Overfire 42.9% 0 O, 660% Overfi re 38.9%N, 0 0, 7.7O1,4) Overfire 42.9% 0 O,. 6.WA
UnderFire 33.7% 0 UnderFire 30.3% 0 UnderFire 33.7% 0
O2computei 5.9% 02computer 6.7-A 02 computer 5.9%
IDsetting 405 IDsetting -0.5 IDsetting -0.5
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