Todd D Hellewell

20090277364, Nov 12, 2009

Feb 26, 2009

12/393439

Richard E. Donais - West Suffield CT, US
Todd D. Hellewell - Windsor CT, US
Robert D. Lewis - Cromwell CT, US
Galen H. Richards - Tremonton UT, US
David P. Towle - Simsbury CT, US

ALSTOM TECHNOLOGY LTD - Baden

F23D 1/00
F23C 5/08

110263, 431186, 2394193, 2394245

A nozzle tip [] for a pulverized solid fuel pipe nozzle [] of a pulverized solid fuel-fired furnace includes: a primary air shroud [] having an inlet [] and an outlet [], wherein the inlet [] receives a fuel flow []; and a flow splitter [] disposed within the primary air shroud [], wherein the flow splitter disperses particles in the fuel flow [] to the outlet [] to provide a fuel flow jet which reduces NOx in the pulverized solid fuel-fired furnace. In alternative embodiments, the flow splitter [] may be wedge shaped and extend partially or entirely across the outlet []. In another alternative embodiment, flow splitter [] may be moved forward toward the inlet [] to create a recessed design.

20120104055, May 3, 2012

Oct 26, 2011

13/281869

Richard E. Donais - West Suffield CT, US
Todd D. Hellewell - Windsor CT, US
Wendell H. Mills - Austin TX, US

ALSTOM TECHNOLOGY LTD - Baden

B05B 1/34

222566

A fuel nozzle assembly including a conduit defining a fuel inlet and a fuel outlet and being operable to convey a fuel stream comprising a solid particulate fuel entrained in a fluid. The conduit has a flow area defined by an interior surface of the conduit. A first flow deflector and a second flow deflector extend inwardly from the interior surface. The first flow deflector and the second flow deflector are positioned to disrupt a velocity profile of the flow stream established upstream of the conduit.

20130291983, Nov 7, 2013

May 5, 2012

13/464963

Mitchell B. Cohen - West Hartford CT, US
Todd D. Hellewell - Windsor CT, US

B01F 5/04

137896

A gas mixing device has a plurality of interleaved rows of adjustable louvers. When at least two flowing gas streams are received that are desired to be mixed, the louvers of each row directs the gas streams in a direction different from that of the adjacent rows, mixing the gas streams. When effectively only a single flowing gas stream is received, the louvers are positioned vertically thereby reducing the pressure drop across the gas mixing device.

50204548, Jun 4, 1991

Oct 31, 1990

7/606682

Todd D. Hellewell - North Granby CT
John Grusha - Windsor CT
Michael S. McCartney - Bloomfield CT

Combustion Engineering, Inc. - Windsor CT

F23D 102

110264

A clustered concentric tangential firing system (12) particularly suited for use in fossil fuel-fired furnaces (10) and a method of operating such furnaces (10) equipped with a clustered concentric tangential firing system (12). The clustered concentric tangential firing system (12) includes a windbox (20), a first cluster of fuel nozzles (38,40) mounted in the windbox (20) and operative for injecting clustered fuel into the furnace (10) so as to create a first fuel-rich zone therewithin, a second cluster of fuel nozzles (68,70) mounted in the windbox (20) and operative for injecting clustered fuel into the furnace (10) so as to create a second fuel-rich zone therewithin, an offset air nozzle (56) mounted in the windbox (20) and operative for injecting offset air into the furnace (10) such that the offset air is directed away from the clustered fuel injected into the furnace (10) and towards the walls of the furnace (10), a close coupled overfire air nozzle (78) mounted in the windbox ( 20) and operative for injecting close coupled overfire air into the furnace (10), and a separated overfire air nozzle (90) mounted in the window (20) and operative for injecting separated overfire air into the furnace (10).

56260857, May 6, 1997

Dec 26, 1995

8/578254

Richard E. Donais - West Suffield CT
Todd D. Hellewell - Windsor CT
Paul D. Kuczma - Enfield CT
Jonathan S. Simon - Barkhamsted CT

Combustion Engineering, Inc. - Windsor CT

F23N 518

110188

A control system for a fuel-fired furnace and more specifically the control of the stoichiometric ratio of the combustion process occurring within the furnace of a steam generating power plant. The control system, when so employed, is capable of regulating the distribution of air flow to the combustion process such that the formation of oxides of nitrogen are maintained at acceptable levels. The control system includes in general a stoichiometric subsystem that determines the mass flow rate of air required to maintain the stoichiometric ratio within the combustion process; an override protection subsystem which ensures control precedence of the windbox-to-furnace pressure differential over the stoichiometry subsystem; and an overfire air subsystem that acts to apportion air flow amongst the various levels of overfire air within the boiler.

60891718, Jul 18, 2000

Aug 15, 1997

8/912903

Milton A. Fong - South Windsor CT
Todd D. Hellewell - Windsor CT
Robert D. Lewis - Cromwell CT
Charles Q. Maney - Longmeadow MA
Srivats Srinivasachar - Sturbridge MA
Majed A. Toqan - Avon CT
David P. Towle - Simsbury CT

Combustion Engineering, Inc. - Windsor CT

F23D 100

110263

A minimum recirculation flame control (MRFC) solid fuel nozzle tip (12) that is suited to being cooperatively associated with a pulverized solid fuel nozzle (34) of a firing system in a pulverized solid fuel-fired furnace (10). The MRFC solid fuel nozzle tip (12) includes a secondary air shroud (46), secondary air shroud support (50) operative for supporting the primary air shroud (48) relative to the secondary air shroud (46), and a splitter plate (52) mounted in supported relation within the primary air shroud (48).

53159390, May 31, 1994

May 13, 1993

8/062634

Michael J. Rini - Hebron CT
Todd D. Hellewell - Windsor CT
David P. Towle - Simsbury CT
Patrick L. Jennings - Granville MA
Richard C. LaFlesh - Suffield CT
David K. Anderson - East Longmeadow MA

Combustion Engineering, Inc. - Windsor CT

F23D 102

110264

An integrated low NO. sub. x tangential firing system (12) that is particularly suited for use with pulverized solid fuel-fired furnaces (10), and a method of operating a pulverized solid fuel-fired furnace (10) equipped with an integrated low NO. sub. x tangential firing system (12). The integrated low NO. sub. x tangential firing system (12) when so employed with a pulverized solid fuel-fired furnace (10) is capable of limiting NO. sub. x emissions therefrom to less than 0. 15 lb. /10. sup. 6 BTU, while yet maintaining carbon-in-flyash to less than 5% and CO emissions to less than 50 ppm. The integrated low NO. sub. x tangential firing system (12) includes pulverized solid fuel supply means (62), flame attachment pulverized solid fuel nozzle tips (60), concentric firing nozzles, close-coupled overfire air (98,100), and multi-staged separate overfire air (104,106).

45054355, Mar 19, 1985

May 16, 1983

6/495012

Todd D. Hellewell - Windsor CT

Combustion Engineering, Inc. - Windsor CT

B02C 2332

241 791

A system for pulverizing coal to be burned in a furnace (20), where nearly all of the coarse ash particles are removed from the coal prior to its introduction to the furnace. The system includes a pulverizing mill (10) having a first classifier (12) in its outlet for separating some of the large, heavy particles and returning them to the pulverizer. A second classifier (16) is connected to the first classifier, and includes a curved duct (16) wherein the solid particles being carried in an airstream are thrown outwardly against an outer wall. A skimmer blade (78) extending through the outer wall skims off a percentage of the large, heavy particles, the percentage depending on how much coarse ash the coal stream contains. The rest of the coal particles are conveyed to a furnace and burned therein. The separated large, heavy particles are passed through an ionizer (30) and then through an electrostatic separator (34), where the inorganic particles are separated from the coal particles.