Pleated Woven Wire Filter

  • US 20120187039A1
  • Filed: 07/22/2011
  • Published: 07/26/2012
  • Est. Priority Date: 08/28/2007
  • Status: Abandoned Application
First Claim
Patent Images

1. A removable, reusable, pleated woven wire filter for removing particulate material from a heavy coker gas oil process stream, the filter capable of withstanding a backwash purge pressure, the process stream containing asphaltenes, heavy catalytic-cracked petroleum distillates, catalytic-cracked petroleum clarified oils, residual heavy petroleum coker gas oil, vacuum gas oil, naptha, coke fines, H2S, Sulphur, Butane, Butene, and Chrysene, the filter comprising:

  • a. a perforated core;

    b. a pleated woven wire filter media wrapped around the perforated core, the filter media having spaced apart pleats and an external filter media surface comprising the external peaks of the pleats;

    c. a stainless steel flattened expanded metal shroud adjacent to and encircling the external peaks, andd. top and bottom end caps connected to the stainless steel flattened expanded metal shroud, and sealed against top and bottom ends of the filter media with a stainless steel adhesive sealant rated at 2,000 degrees Fahrenheit,wherein the process stream operates between 300 and 800 degrees Fahrenheit, and between 150 psig and 500 psig, and the backwash purge pressure varies from 100 psig to 200 psig.

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