The Babcock & Wilcox Company

Other

Babcock & Wilcox Power Generation Group, Inc.

Daniel R Rowley

Albert D LaRue

Hamid Sarv

Edward D Daum

William J Kahle

Alan N Sayre

Dennis W Johnson

William Downs

Thomas J Flynn

Robert A McIlroy

Karl H Schulze

James J Warchol

Jean Czuczwa

Albert D Larue

Sarv Hamid

A large diameter mid-zone air separation cone is provided for decreasing NOx during burner operation by expanding the internal recirculation zone (IRZ) at the burner exit. The mid-zone air separation cone has a short cylindrical leading edge that fits in the outer air zone of a burner. The mid-zone air separation cone splits the outer air zone secondary air flow into two equal or unequal streams depending on the position of the air separation cone with respect to the outer air zone, and deflects a portion of the secondary air flow radially outward. Since the radial position of the air separation cone is farther from the burner centerline, the IRZ size is expanded and NOx emissions are minimized.

Large diameter mid-zone air separation cone for expanding IRZ

A new burner apparatus and method of combusting fossils fuels for commercial and industrial application is provided wherein the new burner apparatus achieves low NOemissions by supplying oxygen to the center of the burner flame in as manners so as to create a fuel rich internal combustion zone within the burner flame.

Burner with center air jet

An integrated flue gas treatment and condensing heat exchanger is used to scrub sulfur dioxide from the flue gas produced by a power boiler used in a paper mill operating a kraft process. Sensible and latent heat from the flue gas is recovered and the condensate effluent from the condensing heat exchanger contains valuable chemicals that are returned to and used in the kraft process.

Waste recovery and utilization in the kraft recovery process

An apparatus for separating solids from a solids and gas flow in a combustor having a fluid circulating system uses a plurality of separators adjacently positioned and horizontally spaced in a path of a solids and gas flow. Each separator includes four tubes. A membrane connected between selected tubes creates a concave-shaped configuration that will capture oncoming solids particles entrained within the flue gas. In one embodiment, fluid from the fluid circulating system flows serially from an inlet into a first leading tube of a first separator through the tubes in each separator in a given row and finally through the second leading vertical tube of a last separator in that row to an outlet and back to the fluid circulating system. Connector tubes communicate with the first leading tube and the first rear tube, the first rear tube and the second rear tube, and the second rear tube and the second leading tube. A separator connector communicates with the second leading tube of one separator and the first leading tube of an adjacent separator. In another embodiment, fluid flows through all of the separators of a given row in parallel by means of inlet and outlet transverse headers.

Water/steam-cooled U-beam impact type particle separator

Water/steam-cooled U-beam impact type article separator

Mixed waste containing organic constituents and low level radioactive waste is remediated in a circulating fluidized bed combustor. Three separators are used to filter the flue gas and separate fine radioactive material from coarse non-radioactive material thereby concentrating the radioactive portion. A primary separator separates large material such as sand, lime, flyash or unburned fuel particles from the flue gas leaving the furnace of the combustor. The flue gas is then passed to a secondary separator for the collection of finer particles. In turn, the flue gas is passed to a tertiary separator for the collection of the finest particles of the flue gas containing low level radioactive waste. Solids entrained in the primary separator are recycled back into the bed of the combustor through an L-valve. Solids entrained at the secondary separator are also recycled back into the bed.

Remediation of low level radioactive mixed waste in a fluidized bed

Growing community of inventors

Alliance, OH, United States of America

Daniel R Rowley