TOXECON Retrofit for Mercury and Multi-Pollutant Control

摘要

In December 2000 EPA announced their intent to regulate mercury emissions from the nations coal-fired power plants.Draft legislation indicates that new regulations may require removal efficiencies as low as 50% or as high as 90% from existing sources.It is also highly desirable that coal utilization byproducts(CUBs)are beneficially used,thereby reducing waste products.TOXECON is an EPRI patented process where sorbents for mercury and other air toxic emissions control are injected into a pulse-jet baghouse that is installed downstream of the existing particulate control device.The TOXECON configuration allows for separate treatment or disposal of the ash collected in the primary particulate control device.Wisconsin Energy Corporation submitted a proposal to DOE under the Clean Coal Power Initiative solicitation to design,install,evaluate and operate TOXECON as an integrated emissions control system for mercury and particulate matter from three 90 MW units at the Presque Isle Power Plant located in Marquette,Michigan..The proposed project will also investigate the capabilities of TOXECON for SO_2 and NO_x control.The approach used in this program of using one baghouse structure for three small boilers further enhances the cost effectiveness by taking advantage of economies of scale.This paper will discuss results from short-term TOXECON tests that were used used in the development of this project and an update of project status.