Integrated Scrubber Wet Electrostatic Precipitator Reduces HAPs Emissions at Secondary Lead Smelter Facility

摘要

A secondary lead smelter recycles lead acid car batteries by using a combination of combustion processes including kilns and furnaces. Extensive pollution control equipment, including wet scrubbers and bag-houses, control emissions from these sources. Despite these controls, there was a need to reduce specific contaminants further in order to meet stringent regulatory standards for hazardous air pollutants (HAPs) such as lead, arsenic and mercury.rnThis challenge was met with an innovative system design that captures low concentrations of specific contaminants present in the gas stream as condensable particulates. An integrated packed bed condenser/absorber (C/A) together with a wet electrostatic precipitator (WESP) reduces specific air contaminants by approximately 90%. Multiple exhaust sources were combined into one stack, reducing initial capital cost and annual stack testing costs. Sub-cooling minimizes the visible steam plume, which lowers the profile of the plant within the community. The air quality district considers the system to represent the best available technology, and some experts believe that the facility is now the cleanest secondary lead smelting facility in the world.