Patents by Inventor Hasthika Weerasinghe

Hasthika Weerasinghe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • System and method for the operation of a furnace that is operated with at least one coal pulverizer
    Patent number: 7849805
    Abstract: A primary air system for a combustion plant provides a flow of primary air to at least one coal pulverizer, which emits pulverized coal in a downstream direction to a furnace. The primary air system includes a first primary air line for feeding hot primary air to the coal pulverizer and a second primary air line for admixing of cold primary air into the hot primary air line at a mixing location positioned upstream of the coal pulverizer. A control system shuts off the flow of primary air to the coal pulverizer, when the coal pulverizer is being repaired or serviced while the furnace is in operation. The control system includes a first flow control butterfly valve disposed in the first primary air line at a position upstream of the mixing location and a second flow control butterfly valve disposed in the second primary air line at a position upstream of the mixing location.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: December 14, 2010
    Assignee: ALSTOM Technology Ltd.
    Inventors: Hellmuth Brüggemann, Frank Rauch, Hasthika Weerasinghe
  • System and method for the operation of a furnace that is operated with at least one coal pulverizer
    Publication number: 20080190337
    Abstract: A primary air system for a combustion plant provides a flow of primary air to at least one coal pulverizer, which emits pulverized coal in a downstream direction to a furnace. The primary air system includes a first primary air line for feeding hot primary air to the coal pulverizer and a second primary air line for admixing of cold primary air into the hot primary air line at a mixing location positioned upstream of the coal pulverizer. A control system shuts off the flow of primary air to the coal pulverizer, when the coal pulverizer is being repaired or serviced while the furnace is in operation. The control system includes a first flow control butterfly valve disposed in the first primary air line at a position upstream of the mixing location and a second flow control butterfly valve disposed in the second primary air line at a position upstream of the mixing location.
    Type: Application
    Filed: February 4, 2008
    Publication date: August 14, 2008
    Inventors: Hellmuth Bruggemann, Frank Rauch, Hasthika Weerasinghe