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Reduction of mercury in coal combustion gas system and method

  • US 5,787,823 A
  • Filed: 02/06/1996
  • Issued: 08/04/1998
  • Est. Priority Date: 09/23/1994
  • Status: Expired due to Fees
First Claim
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1. A method for removing mercury from a gas stream exiting a coal fired combustion chamber, comprising the steps of:

  • (a) introducing the gas stream into a recirculating cyclone;

    (b) removing particulate matter from the cyclone; and

    (c) reintroducing particulate matter removed from the cyclone into the gas stream, such that the particulate matter resides in the gas stream for a relatively increased period of time, at least a portion of the particulate matter bonding with mercury contained within the gas stream.

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