Patents Assigned to The Babcock & Wilcox Company
  • Patent number: 10653996
    Abstract: The present invention relates generally to the field of emission control equipment for boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants, etc.) and, in particular to a new and useful method and apparatus directed to one or more of: (i) reducing the levels of NOx from one or more types of combustors, furnaces or boilers; (ii) reducing the levels of NOx from one or more types of biomass combustors, furnaces or boilers; or (iii) reducing the levels of NOx from one or more types of fluidized bed biomass combustors, furnaces or boilers. In one embodiment, the method and apparatus of the present invention permit the use of a less complex and/or expensive system to accomplish selective non-catalytic reduction (SNCR) and enable one to achieve DeNOx (NOx reduction) under low load or unit turndown operation for biomass combustion in a bubbling fluidized bed (BFB) boiler.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: May 19, 2020
    Assignee: The Babcock & Wilcox Company
    Inventors: James F Desellem, Mandar R Gadgil, Laura M McDermitt, Margaret Yeager, Thomas J Flynn
  • Patent number: 10589226
    Abstract: The present invention relates generally to the field of emission control equipment for boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants, etc.) and, in particular to a new and useful method and apparatus for reducing and/or eliminating various liquid discharges from one or more emission control equipment devices (e.g., one or more wet flue gas desulfurization (WFGD) units). In another embodiment, the method and apparatus of the present invention is designed to reduce and/or eliminate the amount of liquid waste that is discharged from a WFGD unit by subjecting the WFGD liquid waste to one or more drying processes, one or more spray dryer (or spray dry) absorber processes, and/or one or more spray dryer (or spray dry) evaporation processes.
    Type: Grant
    Filed: May 21, 2015
    Date of Patent: March 17, 2020
    Assignees: The Babcock & Wilcox Company, GEA Process Engineering A/S
    Inventors: Michael G Klidas, Kevin E. Redinger, Joseph M Mitchell, III, Steven Feeney, Niels Jacobsen, Claus Erik Boilesen
  • Patent number: 10478775
    Abstract: The present invention relates generally to the field of emission control equipment for boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants, etc.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: November 19, 2019
    Assignee: The Babcock & Wilcox Company
    Inventors: Prasanna Seshadri, Richard DeVault
  • Patent number: 10471384
    Abstract: The present invention relates generally to the field of emission control equipment for boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants, etc.) and, in particular to a new and useful method and apparatus for: (i) reducing halogen levels necessary to affect gas-phase mercury control; (ii) reducing or preventing the poisoning and/or contamination of an SCR catalyst; and/or (iii) controlling various emissions. In still another embodiment, the present invention relates to a method and apparatus for: (A) simultaneously reducing halogen levels necessary to affect gas-phase mercury control while achieving a reduction in the emission of mercury; and/or (B) reducing the amount of selenium contained in and/or emitted by one or more pieces of emission control equipment for boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants, etc.).
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: November 12, 2019
    Assignee: The Babcock & Wilcox Company
    Inventors: Mandar R Gadgil, Bryan J Jankura
  • Patent number: 10471386
    Abstract: The present invention relates generally to the field of emission control equipment for boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants, etc.) and, in particular to a new and useful method and apparatus for capturing, oxidizing, lowering the concentration and/or level of, and/or eliminating mercury present in any flue gas and/or combustion gas stream. In one embodiment, the method and/or apparatus of the present invention is applied to boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices that have connected thereto at least one type of flue gas, or combustion gas, scrubber device (i.e., a wet scrubber or a dry scrubber).
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: November 12, 2019
    Assignee: The Babcock & Wilcox Company
    Inventors: Steven Feeney, Mandar R Gadgil
  • Patent number: 10429061
    Abstract: Material handling systems for fluids are disclosed herein. The fluid may be a liquid, solution, slurry, or emulsion. The systems receive as inputs the fluid, steam, and water. These feed into a surge tank where additives can be introduced. The steam and water are used to control some physical properties and enable the distribution of the fluid as desired. In particular embodiments, the system is useful for handling materials to be sent to a dual-phase fuel feeder for combustion in a fluidized-bed boiler, the energy being used to generate electricity or in various production processes.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: October 1, 2019
    Assignee: The Babcock & Wilcox Company
    Inventors: James F DeSellem, Karl M Heil, Steven L Osborne, John A Kulig, Larry A Hiner
  • Patent number: 10429062
    Abstract: A boiler is disclosed in which the furnace is divided into a lower furnace and an upper furnace. The lower furnace uses water-cooled membrane walls, while the upper furnace uses steam-cooled membrane walls that act as superheating surfaces. A transition section is present between the lower furnace and the upper furnace. The boiler is a high temperature sub-critical natural circulation boiler which is completely top supported. The lower furnace is supported through the transition section by the upper furnace.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: October 1, 2019
    Assignee: The Babcock & Wilcox Company
    Inventors: Eric L Wells, Roger A Detzel, Albert J Bennett, Steven D Thayer
  • Patent number: 10415825
    Abstract: Energy is generated from cellulosic biofuel waste streams, specifically a lignin filter cake and a waste syrup, by combusting these waste products in a fluidized bed combustor under specified conditions. The heat and steam generated can be used to generate electricity and/or in cellulosic biofuel production processes.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: September 17, 2019
    Assignee: The Babcock & Wilcox Company
    Inventors: James F DeSellem, Thomas J Flynn, Karl M Heil, Eric L Wells
  • Patent number: 10415819
    Abstract: A boiler is disclosed in which the furnace is divided into a lower furnace and an upper furnace. The lower furnace uses water-cooled membrane walls, while the upper furnace uses steam-cooled membrane walls that act as superheating surfaces. The upper furnace and the convection pass are also located next to each other, so that they share a common steam-cooled wall. There is no open pass between the furnace and the convection pass.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: September 17, 2019
    Assignee: The Babcock & Wilcox Company
    Inventors: Eric L Wells, Roger A Detzel, Albert J Bennett, Steven D Thayer
  • Patent number: 10253972
    Abstract: Transition castings are disclosed which comprise a steam tube and a water tube, which are joined together by membranes. A heat transfer fin extends from the membrane and abuts the water tube. The steam tube bends such that an upper end is on one side of the water tube, and a lower end is on an opposite side of the water tube. The transition castings are used in a transition section of a boiler in which the furnace is divided into a lower furnace and an upper furnace. The lower furnace uses water-cooled membrane walls, while the upper furnace uses steam-cooled membrane walls that act as superheating surfaces. The transition casting joins the lower furnace and the upper furnace together.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: April 9, 2019
    Assignee: The Babcock & Wilcox Company
    Inventors: Eric L Wells, Roger A Detzel, Albert J Bennett, Steven D Thayer, Kevin L Brewster
  • Patent number: 10234169
    Abstract: Transition castings are disclosed which comprise a steam tube, a water tube, and a pass-through tube, which are joined together by membranes. The ends of the tubes on one vertical end are aligned in a plane, while the ends of the tubes on the other vertical end are aligned in alternating planes, or put another way are angled instead of being in a straight line. The transition castings are used in a transition section of a boiler in which the furnace is divided into a lower furnace and an upper furnace. The lower furnace uses water-cooled membrane walls, while the upper furnace uses steam-cooled membrane walls that act as superheating surfaces. The transition section joins the lower furnace and the upper furnace together.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: March 19, 2019
    Assignee: The Babcock & Wilcox Company
    Inventors: Eric L Wells, Roger A Detzel, Albert J Bennett, Steven D Thayer
  • Patent number: 10213738
    Abstract: The present invention relates generally to the field of emission control equipment for boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants, etc.) and, in particular to a new and useful method and apparatus for reducing or preventing the poisoning and/or contamination of an SCR catalyst. In still another embodiment, the present invention relates to a method and apparatus for increasing the service life and/or catalytic activity of an SCR catalyst while simultaneously controlling various emissions. In yet another embodiment, the present invention relates to a method and apparatus for controlling, mitigating and/or reducing the amount of selenium contained in and/or emitted by one or more pieces of emission control equipment for boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants, etc.).
    Type: Grant
    Filed: February 18, 2013
    Date of Patent: February 26, 2019
    Assignee: The Babcock & Wilcox Company
    Inventors: Mandar R Gadgil, Bryan J Jankura, Jeb W Gayheart
  • Patent number: 10215399
    Abstract: A small supercritical once-through steam generator (OTSG) includes a radiant section with a furnace coil, and a convection section downstream of the radiant section that includes a superheater which is fluidically connected to the furnace coil. Optionally, the OTSG is devoid of a steam separator. An economizer can also be included downstream of the superheater. Supercritical steam can be generated using the OTSG, for use, among other things, in enhanced oil recovery applications.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: February 26, 2019
    Assignee: The Babcock & Wilcox Company
    Inventors: Michael A Costanzo, James S Bloss
  • Patent number: 10208951
    Abstract: A spray dryer absorber (SDA) system used to reduce the concentration of at least one acid compound in a gas utilizes low or no alkali-containing particulate compounds to prevent cementing during operation. The low or no-alkali-containing compounds may be supplied from external sources and/or from a particulate collection device located downstream of the SDA.
    Type: Grant
    Filed: September 13, 2007
    Date of Patent: February 19, 2019
    Assignee: THE BABCOCK & WILCOX COMPANY
    Inventor: Mikhail Maryamchik
  • Patent number: 10197267
    Abstract: An apparatus for using a water coil air heater with a single bank economizer. A boiler economizer arrangement includes an economizer bank which has separate hot pass bank and cold pass bank economizer portions in a parallel arrangement, each facing the same flow of hot flue gas. Feedwater enters the cold pass bank economizer where it is heated by the hot flue gas, and then flows to a water coil air heater away from the hot flue gas. The feedwater dissipates heat energy in the water coil air heater which may be used to heat air bound for combustion. The feedwater continues into the hot pass bank economizer portion of the economizer arrangement where it absorbs additional heat from the flue gas. The heated feedwater flows out of the economizer arrangement and may be subject to additional heating by a boiler or other heat exchanger.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: February 5, 2019
    Assignee: THE BABCOCK & WILCOX COMPANY
    Inventors: Jeffrey J. Gries, Larry A Hiner, William R Stirgwolt
  • Patent number: 10144661
    Abstract: The present invention relates generally to the field of emission control equipment for boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants) and, in particular to a new and useful method and apparatus designed to improve the water supplied to non-calcium-based, aqueous wet SOx scrubbers. In another embodiment, the present invention relates to a system and method for softening water for use in non-calcium-based, aqueous wet SOx scrubbers.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: December 4, 2018
    Assignee: THE BABCOCK & WILCOX COMPANY
    Inventors: William Downs, Paul J Williams
  • Patent number: 10124968
    Abstract: A simplified submerged chain conveyor system for handling ash produced by large-scale coal fired boilers. The system incorporates an endless chain conveyor system moving a coal/ash aqueous mixture within a conveyor segment having a hydraulically closed duct. The system is adapted for retrofit applications of existing coal-fired boiler installations. In each embodiment the chain conveyor elevates the aqueous ash solution to dewater the ash. In several embodiments the boiler ash hopper is partially flooded with water and the system moves the ash mixture through a water column to the dewatering section. In one embodiment the ash mixture is not submersed but is subjected to water sprays before reaching the dewatering section. Great flexibility is provided in locating and positioning the conveyor system. One unit may be implemented to provide ash handling for multiple boilers. Embodiments are described operable in continuous or batch mode processes.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: November 13, 2018
    Assignees: THE BABCOCK & WILCOX COMPANY, BABCOCK & WILCOX LOIBL GMBH
    Inventors: Loius A Zotti, Randy Jay Reynolds, Manfred Reinsch, Karl Josef Zeitler, Austin Tyler Little
  • Patent number: 10113536
    Abstract: Methods of arranging and operating a molten salt solar thermal energy system are disclosed. Molten salt flows from a set of cold storage tanks to solar receivers which heat the molten salt to a maximum temperature of about 850° F. The heated molten salt is sent to a set of hot storage tanks. The heated molten salt is then pumped to a steam generation system to produce steam for process and/or power generation. Lower salt temperatures are useful in processes that use lower steam temperatures, such as thermal desalination. Lower salt temperatures and low chloride molten salt reduce the corrosion potential, permitting the use of lower cost alloys for the solar receivers, hot storage tanks, salt pumps, piping and instrumentation and steam generation system. Multiple sets of modular, shop assembled storage tanks are also used to reduce the amount of salt piping, simplify draining, and reduce field assembly and plant cost.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: October 30, 2018
    Assignee: THE BABCOCK & WILCOX COMPANY
    Inventors: David T Wasyluk, Kiplin C Alexander, Kenneth L Santelmann, Jason M Marshall
  • Patent number: 10018356
    Abstract: The present invention relates generally to the generation of steam via the use of a combustion process to produce heat and, in one embodiment, to a device, system and/or method that enables one to control one or more process parameters of a combustion process so as to yield at least one desirable change in at least one downstream parameter. In one embodiment, the present invention is directed to a system and/or method for controlling at least one process parameter of a combustion process so as to yield at least one desirable change in at least one downstream process parameter associated with one or more of a wet flue gas desulfurization (WFGD) unit, a particulate collection device and/or control of additives thereto and/or a nitrogen oxide control device and/or control of additives thereto and/or additives to the system.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: July 10, 2018
    Assignee: The Babcock & Wilcox Company
    Inventors: Daniel B. Johnson, Shannon R. Brown
  • Patent number: 9989244
    Abstract: A system can quickly cool and de-pressurize a boiler arrangement under non-normal operating conditions such as loss of plant power. A discharge system injects into the furnace a combined stream of steam from a steam discharge system and ambient air, thereby both cooling components of the boiler arrangement and reducing pressure in the steam/water circuit. This reduces or eliminates the additional cost associated with providing extra capacity in a steam drum and/or an independently powered boiler water pump. The system is particularly useful for quickly cooling the U-beams of a circulating fluidized bed boiler during a black plant condition.
    Type: Grant
    Filed: March 1, 2016
    Date of Patent: June 5, 2018
    Assignee: The Babcock & Wilcox Company
    Inventors: Mikhail Maryamchik, Michael J Szmania, Donald L Wietzke