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Method and apparatus for detecting leaks in filter bags of a baghouse

  • US 4,304,492 A
  • Filed: 12/07/1979
  • Issued: 12/08/1981
  • Est. Priority Date: 12/07/1979
  • Status: Expired due to Term
First Claim
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1. A method for detecting leakage during flow conditions of particulate matter through a filter bag used to filter a particle laden gas stream which is passed through the bag from the outside thereof into an open interior region of the bag and then out through an open end of the bag, said method comprising the steps of:

  • continuously directing a light beam across the path of the gas stream flowing out the open end of the filter bag to effect impingement of the light beam on the particulate matter contained in the gas stream flowing through the open end of the bag, whereby the amount of light passing across the open end of the bag is dependent upon the amount of particulate matter leaking through the filter bag; and

    continuously sensing the amount of light passing across the open end of the filter bag to thereby detect the amount of particulate matter leaking through the bag.

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