State of California
AIR RESOURCES BOARD
Sheraton-Town House Hotel
2961 Wilshire Boulevard
Los Angeles, CA
November 5, 1980
80-22-1 CONTINUATION OF Public Meeting to Consider 001
Suggested Control Measure for the Control of
Oxides of Nitrogen from Glass Melting Furnaces.
November 5, 1980
80-22-2 Public Hearing to Reconsider Rule 1135.1 of 081
the South Coast Air Quality Management District
and Rule 59.1 of the Ventura County Air Pollution
Control District Controlling Emissions of Oxides
of Nitrogen from Power Plants.
November 6, 1980
80-23-1 CONTINUATION OF Public Hearing to Reconsider Rule
1135.1 of the South Coast Air Quality Management
District and Rule 59.1 of the Ventura County Air
Pollution Control District Controlling Emissions of
Oxides of Nitrogen from Power Plants.
80-23-2 Other Business
a. Executive Session
b. Research Proposals
c. Delegations to Executive Officer
ITEM NO.: 80-22-1
Public meeting to Consider Suggested Control Measure for the
Control of Oxides of Nitrogen from Glass Melting Furnaces.
SUMMARY AND STATEMENT OF REASONS FOR SUGGESTED CONTROL MEASURE
The staff of the Air Resources Board (ARB) has identified the
need to reduce emissions of oxides of nitrogen (NOx) from
stationary sources in the South Coast Air Basin (SCAB). This
need exists because the state and national ambient air quality
standards for nitrogen dioxide (NO2) are consistently violated in
this air basin, and emissions from currently uncontrolled glass
melting furnaces which have been estimated at 11.2 tons of NOx
per day in the SCAB, contribute to these violations.
Additionally, emissions of NOx from glass melting furnaces
contribute to violations of state and/or national ambient air
quality standards for total suspended particulate, oxidant
(ozone) and visibility in the South Coast Air Basin, the San
Joaquin Valley Air Basin and the San Francisco Bay Area Air
Basin. Statewide emissions of NOx from glass melting furnaces
are estimated by staff to be approximately 34 tons per day.
The ARB staff has determined that reducing NOx emissions from
glass melting furnaces is feasible and cost-effective.
Combustion modifications, process modification, new furnace
designs and flue gas treatment are available emission control
techniques which either singularly or combined would enable a
glass manufacturer to comply with the suggested control measure.
Combustion and process modifications may include excess air
reductions, increased use of cullet, electric boosting, and
burner modifications. New furnace designs capable of attaining
the suggested emission limitations include a small melting area
high electric boost design and a large area low peak temperature
design. Various flue gas treatment systems also cost-effectively
reduce NOx emissions by 60 to 90 percent.
Companies marketing flue gas treatment systems include Hitachi-Zosen and
Exxon Corporation among others. Hitachi-Zosen
guarantees a selective catalytic reduction system that will
reduce NOx emissions by 90 percent. Exxon Corporation offers a
selective noncatalytic reduction (SNR) system that will likely
reduce emissions 45 to 60 percent. This SNR system is applicable
to new furnaces and may be retrofittable to existing furnaces.
The staff also expects nonselective noncatalytic reduction
technology to soon be proven on Japanese glass melting furnaces.
Expected reductions with this technology range from 50 to 70
percent. Finally, wet NOx scrubbing technology may offer an
emission control alternative. However, more testing of this
process is needed to prove its feasibility.
The suggested control measure requires an average reduction of 60
to 70 percent over typical 1978 glass furnace emission rates.
Specifically, flat glass furnaces are limited to an emission rate
of 2.5 gm NOx per kg of glass pulled while all other glass
furnace types are limited to 1.0 gm NOx per kg of glass pulled.
The compliance date for flat glass furnaces is January 1, 1983.
All other types of glass furnaces must be in compliance at the
next scheduled furnace rebuild, starting January 1, 1983, with
all furnaces in compliance by January 1, 1987. The proposed
measure contains an exemption for furnaces limited to district
permit conditions to a maximum NOx emission rate of 15 pounds per
The staff estimates the cost effectiveness of this suggested
control measure to range from $0.42 to $1.94 per pound of NOx
removed. Also, the staff believes there are no significant
adverse environmental impacts associated with the implementation
of this suggested control measure.
The staff report contains detailed discussion of the need for
control of this source, the control technology, and the economic
and environmental impacts of the proposed measure. Also included
are a copy of the suggested control measure and a list of
references to any studies relied upon.