A Dry Scrubber for Pre-NSPS BoilersEPA Contract Number: 68D10051
Title: A Dry Scrubber for Pre-NSPS Boilers
Investigators: Smolensky, Leo A.
Small Business: LSR Environmental Systems Co.
EPA Contact: Manager, SBIR Program
Project Period: September 1, 1991 through March 1, 1992
Project Amount: $50,000
RFA: Small Business Innovation Research (SBIR) - Phase I (1991) RFA Text | Recipients Lists
Research Category: Air Quality and Air Toxics , SBIR - Air Pollution , Small Business Innovation Research (SBIR)
Description:A new method for removing acid rain precursors from coal-fired boilers has been conceived. The concept involves a tail-end scrubber retrofit for installation In plants which pre-date the 1970 Clean Air Act. The concept is highly innovative and has many advantages over other sorbent injection processes.
Heterogeneous reactions between SO2 and calcium-based sorbents are affected by the mass transfer between the two phases and the contacting patterns of the reactants. Fluid- ized bed systems have been found to be well suited to these reactions because of their turbulent mixing and ability to control gas and particle residence times. A unique type of circulating bed reactor, called a twin scrubber, is proposed for this retrofit application. Some of its advantages include very low space requirements, enhanced mass transfer, ab- sence of a distributor plate, few sorbent injection points, and high turndown. The proposed Phase I program includes a feasibility analysis of this concept.