Michael C Chen

US Patent:

6902126, Jun 7, 2005

Filed:

Nov 4, 2002

Appl. No.:

10/287107

Inventors:

Michael M. Chen - Naperville IL, US
Jianrong Chen - Naperville IL, US

Assignee:

ALSTOM Technology Ltd - Baden

International Classification:

B02C023/12

US Classification:

241 791, 241 80

Abstract:

A hybrid turbine classifier for a coal pulverizer includes a cone disposed within the separator body of the pulverizer. The cone extends downwardly from a base to a frustum which forms an opening for depositing coal particles on the grinding table of the pulverizer. The outer surface of the cone and the separator body define an outer passage for coal/air flow, containing a mixture of smaller and larger coal particles, from the grinding table. A circular, first classifier cage disposed proximate to the base of the cone defines a circumferential passage between the outer passage and the cavity of the cone. The first classifier cage includes static, circumferentially-spaced vanes which direct the coal/air flow in a spiraling, circular flow path within the cavity. The flow path defines a first flow direction. A circular, second classifier cage is coaxially disposed within the first classifier cage.

US Patent:

7028847, Apr 18, 2006

Filed:

May 29, 2003

Appl. No.:

10/449407

Inventors:

Michael M. Chen - Naperville IL, US
Jianrong Chen - Naperville IL, US

Assignee:

ALSTOM Technology Ltd - Baden

International Classification:

B07B 9/00
B07D 4/00

US Classification:

209713, 209132, 209133, 209142, 209710

Abstract:

A two-stage dynamic classifier (′) for classifying a pulverized feed material () entrained in an air flow () includes a vertically extending housing having a lower feed material inlet (18), an upper feed material outlet (), a processing section (′) disposed between the feed material inlet and the feed material outlet, and a lower tailings discharge (). A classifier conditioner () is disposed in a lower portion of the processing section and a turbine classifier () is disposed in an upper portion of the processing section.

US Patent:

7325761, Feb 5, 2008

Filed:

May 18, 2004

Appl. No.:

10/847958

Inventors:

Michael Ming-Ming Chen - Naperville IL, US
Jianrong Chen - Naperville IL, US
David Michael Podmokly - Downers Grove IL, US

Assignee:

ALSTOM Technology Ltd

International Classification:

B02C 13/00

US Classification:

241194, 241195

Abstract:

A hammer is provided for a material size-reducing machine of the type including a rotor on which the hammer is individually pivotally mounted. The hammer includes a mounting end having a throughbore for receiving a pivot pin therethrough in connection with the pivot mounting of the hammer on the rotor, an extending portion with the center of mass CGM located therein. The extending portion has a non-linear body portion and a linear body portion with the linear body portion being inclined in a direction opposite to the rotation direction at an angle between 5 to 45 degrees as measured relative to a line RFL extending through the center of the pivot pin and the center of mass CGM of the hammer.

US Patent:

7665681, Feb 23, 2010

Filed:

Nov 14, 2007

Appl. No.:

11/939621

Inventors:

Michael M. Chen - Naperville IL, US

Assignee:

ALSTOM Technology Ltd - Baden

International Classification:

B02C 23/32

US Classification:

241 52, 241 57, 241 791, 241 80, 241119, 241129

Abstract:

A roller mill for pulverizing material and separating the pulverized material has a mill for crushing the material and a classifier disposed on the mill for separating the crushed material. The mill includes a grinding mechanism that has a plurality of grinding rolls and a grinding ring that coact to pulverize material within a mill housing, which defines a grinding chamber. The classifier is a centrifugal-type classifier having a motor-driven rotor disposed within a classifier housing, which define a classifying chamber. The rotor has a plurality of blades that extend outwardly from the rotor. As the rotor rotates within the classifying chamber, the blades separate fine sized particles from oversized particles by passing the finer sized particles through the blades, and contacting and propelling the oversized particles against the classifier housing. The oversize particles fall downward through an outer annular passage defined by a baffle and the mill housing back to the grinding mechanism. The baffle is disposed along the inner periphery of the mill housing spaced at a distance from the mill housing to provide an inner passage and an outer annular passage.

US Patent:

7897134, Mar 1, 2011

Filed:

Aug 7, 2009

Appl. No.:

12/537617

Inventors:

Michael M. Chen - Naperville IL, US

Assignee:

ALSTOM Technology Ltd - Baden

International Classification:

B01J 19/00
C01F 11/46
C04B 11/02

US Classification:

423555, 106772, 422129, 422187, 422232, 422234

Abstract:

A system () for calcining natural gypsum, synthetic gypsum () or a combination thereof, the system including: a mill () for grinding and drying natural gypsum, synthetic gypsum () or a combination thereof, to produce dried gypsum (); a flash calciner () for calcining the dried gypsum to produce an exhaust gas () and calcined gypsum (); and a mechanism () for transporting at least a portion of the exhaust gas () produced by the flash calciner () to an air heater () that supplies hot gas () to the flash calciner ().

US Patent:

7963471, Jun 21, 2011

Filed:

Nov 13, 2008

Appl. No.:

12/270073

Inventors:

Michael M. Chen - Naperville IL, US

Assignee:

ALSTOM Technology Ltd - Baden

International Classification:

B02C 15/08

US Classification:

241129

Abstract:

A roller mill for pulverizing fine material has a grinding mechanism that includes a plurality of grinding rolls and a grinding ring that coact to pulverize material within a mill housing. The grinding ring has an inner grinding surface wherein the inner surface includes an upper vertical portion and inwardly sloped lower portion. The lower portion of the ring provides a means for retaining more fine particles on the ring during pulverizing, as well as an increase in grinding surface. The grinding rolls have a generally cylindrical shape with an outer grinding surface that includes an upper vertical portion and a lower portion of the outer grinding surface. The outer grinding surface of the roll is complementary to the inner grinding surface of the grinding ring.

US Patent:

8440867, May 14, 2013

Filed:

Aug 2, 2010

Appl. No.:

12/848496

Inventors:

Theodore R. Krause - Naperville IL, US
Jerome W. Rathke - Homer Glen IL, US
Michael J. Chen - Downers Grove IL, US

Assignee:

U.S. Department of Energy - Washington DC

International Classification:

C07C 31/02

US Classification:

5689022

Abstract:

The invention provides a method for producing ethanol, the method comprising establishing an atmosphere containing methanol forming catalyst and ethanol forming catalyst; injecting syngas into the atmosphere at a temperature and for a time sufficient to produce methanol; and contacting the produced methanol with additional syngas at a temperature and for a time sufficient to produce ethanol. The invention also provides an integrated system for producing methanol and ethanol from syngas, the system comprising an atmosphere isolated from the ambient environment; a first catalyst to produce methanol from syngas wherein the first catalyst resides in the atmosphere; a second catalyst to product ethanol from methanol and syngas, wherein the second catalyst resides in the atmosphere; a conduit for introducing syngas to the atmosphere; and a device for removing ethanol from the atmosphere. The exothermicity of the method and system obviates the need for input of additional heat from outside the atmosphere.

US Patent:

8550389, Oct 8, 2013

Filed:

Jul 25, 2008

Appl. No.:

12/179998

Inventors:

Michael M. Chen - Naperville IL, US

Assignee:

ALSTOM Technology Ltd - Baden

International Classification:

B02C 13/09

US Classification:

2411881, 241194, 241197

Abstract:

A hammermill, such as an imp mill , for pulverizing material includes a housing defining a grinding chamber having a grinding apparatus disposed therein. The material is fed into the grinding chamber to the grinding apparatus through an inlet conduit , and the resulting ground material is directed from the grinding chamber through an outlet conduit. The grinding apparatus includes a plurality of hammer disks axially spaced along a rotor , wherein disks are disposed within the grinding chamber. A plurality of rows - of hammers is attached to the hammer disks. The hammers of each respective row of hammers are circumferentially spaced around the hammer disks , wherein each row of hammers is formed to provide generally uniform wear across each row of hammers. The uniform wear may be achieved by forming the hammers of different hardness or wear resistant qualities, and/or configuring the rows of hammers with different shapes.