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EMISSIONS PATH BEFORE WESP AND RTO PROJECT

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REVERB FURNACE

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EMISSIONS PATH AFTER WESP AND RTO PROJECT

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Generalized WESP Process Description Conditioning Outlet Section

• Neutralize acid gases

• Polish S02 removal INLET

HEADER

A CONOITlONING

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FOG HEADIR

• Supports high voltage grid

• Air purge system to clean high voltage insulators

• Wash headers to provide wet film for PM removal

Collection Section • Collects and

removes rticulate

lRAHSFORNER RECT1F1ER

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Section • Ensures gas is

saturated • Evenly distributes

gas to collection section 0VJlET

SECTION

• Sub-cools gas in condenser/ab~,ort)e'~i~

Electric Field

• Electron

Neutral Gas Molecule

Ionized Gas Molecule

Particle

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•

~. • • •

", • Corona Discharge

Levels of Regulation

, National Ambient Air Quality Standard for Lead (Lead NAAQS)

• 1.5 ug/m3 (current)

• 0.15 ug/m3 (adopted & beginning implementation)

, National Emission Standards for Hazardous Air Pollutants for Secondary Lead Smelters (Subpart X)

, California-specific rules:

, Rule 1420.1 • Early implementation of new Lead NAAQS

, Rule 1402 • Health Risk Assessment and Reduction

15

of lead emissions for other smelters compared to the lead emissions from the Quemetco City of Industry Faci lity. Forexample. for each pound of lead emitted by the Quemetco City of Industry Facility in California the Sanders Lead Facility in Alabama emits 86 pounds.

RTO - Regenerative Thermal Oxidation

Thermal Beds

Exhaust Duct

Inlet Blower

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18

1, 3-Butadiene Emissions Reduced 98.4% & Benzene Emissions Reduced 94.6% by RTO

2,500 Pre-Project

2,024

2,000 Pre-Project

1,653

1,500

. 1,3­Butadiene

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is 1,000 • Benzene

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Post-Project Post-Project

33.3 89.8

Comparison of Emissions Pre- and Post-RTO Installation