A Dry Scrubber for Pre-NSPS Boilers

EPA 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
Phase: I
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)


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.

Supplemental Keywords:

Scientific Discipline, Air, Sustainable Industry/Business, air toxics, cleaner production/pollution prevention, Chemistry, Technology for Sustainable Environment, New/Innovative technologies, Engineering, Engineering, Chemistry, & Physics, air pollutants, control, coal fired utility boiler , emission control technologies, acid rain precursors, air pollution control, dry scrubber, emission controls, emissions control, fluidized bed combustion, twin scrubber, air scrubbers, innovative technology, air pollutant precursors, coal combustion, innovative technologies, air emissions, acid rain

Progress and Final Reports:

  • Final