Patents Assigned to Siemens Enviromental Systems&Services
  • Hybrid wet and dry electrostatic precipitator ammonia scrubber
    Patent number: 7311887
    Abstract: A process reduces SOx emissions in a flue gas stream by adding a wet collector plate section to an existing electrostatic precipitator (ESP) or by converting the last field of an existing ESP to wet operation. To achieve the conversion, the last field or fields of an existing dry ESP are removed and replaced with components made from materials suitable for operation in a wet environment. After the ESP contains wet operation, ammonia is added to the flue gas stream while it is progressing through the collection plates in the ESP.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: December 25, 2007
    Assignee: Siemens Enviromental Systems&Services
    Inventors: Ralph F. Altman, John Montgomery, Boris Altshuler, Wayne P. Buckley