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Air treatment process for dilute phase injection of dry alkaline materials

  • US 9,149,759 B2
  • Filed: 06/03/2014
  • Issued: 10/06/2015
  • Est. Priority Date: 03/10/2010
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • introducing, by an array of lances, an additive-containing fluid, comprising an additive material and carrier gas, into a contaminated gas stream;

    in response to a sensed stimulus associated with an additive deposited in a first lance, terminating flow of the additive material through the first lance of the lance array but not through at least one other lance of the lance array;

    while the additive material is not flowing through the first lance, flowing, through the first lance, at least one of a purge gas and a chemical cleaner, to remove at least part of the additive deposited in the first lance; and

    thereafter commencing flow of the additive material through the first lance.

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