Kurt D Johnson

US Patent:

6594553, Jul 15, 2003

Filed:

Apr 18, 2000

Appl. No.:

09/552183

Inventors:

Kurt W. Johnson - Stafford Springs CT
Ferdinand A. Ruszala - Colchester CT
Peter T. Stromberg - Simsbury CT
James F. Durant - Bloomfield CT

Assignee:

Alstom (Switzerland) Ltd - Baden

International Classification:

G05B 2100

US Classification:

700273, 700266, 423539

Abstract:

The present invention provides, according to one aspect thereof, a computer controlled process for reducing SO from a flue gas. The process includes the basic steps of providing an aqueous treatment solution containing an inorganic salt and a control unit for controlling the introduction of the aqueous treatment solution containing an inorganic salt and controlling the control unit in response to a computer program to effect introduction of the aqueous treatment solution into contact with alkaline earth material. Thereafter, the process includes heating the alkaline earth material in the presence of the flue gas containing SO to remove the SO. The alkaline earth material may be limestone or dolomite. The inorganic salt is selected from the group consisting of thermally decomposable sodium compounds including sodium carbonate, sodium bicarbonate, sodium hydroxide, sodium nitrate, and sodium acetate. In selected applications of the process of the present invention, the inorganic sodium compound has a concentration of between 0.

US Patent:

7780765, Aug 24, 2010

Filed:

Jun 30, 2008

Appl. No.:

12/164400

Inventors:

Srivats Srinivasachar - Sturbridge MA, US
Shin G. Kang - Simsbury CT, US
Kurt W. Johnson - East Windsor CT, US

Assignee:

ALSTOM Technologies Ltd

International Classification:

B01D 53/02

US Classification:

95134, 95 58, 110203, 110345, 423210

Abstract:

A method for removing mercury from flue gases generated by the combustion of coal comprises: storing a starter batch of activated carbon in an agglomerated state; de-agglomerating the starter batch in a separation device to create a contact batch of activated carbon; transporting the contact batch to a contact location; injecting the contact batch into contact with the flue gas at a contact location having a temperature between 400 F. and 1100 F. , whereupon the activated carbon of the contact batch adsorbs mercury from the flue gas; and removing the activated carbon having mercury adsorbed thereon from the flue gas. The transporting step is conducted with substantially no intermediate storage of the contact batch following the de-agglomeration of the starter batch to prevent re-agglomeration of the activated carbon prior to injection.

US Patent:

8069797, Dec 6, 2011

Filed:

Oct 8, 2004

Appl. No.:

10/961697

Inventors:

Srivats Srinivasachar - Sturbridge MA, US
Shin G. Kang - Simsbury CT, US
Kurt W. Johnson - East Windsor CT, US

Assignee:

ALSTOM Technology Ltd.

International Classification:

F23J 11/00

US Classification:

110345, 110342

Abstract:

A system for removing elemental mercury or mercury compounds handles carbonaceous sorbent of a starter batch stored in a silo in an agglomerated state. The sorbent is fed by a feeder to a separation device , which comminutes (if necessary) and de-agglomerates the sorbent particles to their primary size distribution. This device may be a particle-particle separator or a jet mill, where compressed air or high-pressure steam is the energy source. The de-agglomerated sorbent of a contact batch created from the starter batch is conveyed by an airsteam for injection at a contact location in a flue gas duct whereat carbonaceous sorbent of the contact batch adsorbs mercury from the flue gas.