×

METHOD AND APPARATUS FOR DECOKING TUBES IN AN OIL REFINERY FURNACE

  • US 20080234868A1
  • Filed: 03/24/2008
  • Published: 09/25/2008
  • Est. Priority Date: 03/23/2007
  • Status: Active Grant
First Claim
Patent Images

1. A control system for performing a global-decoke of a tube furnace comprising a plurality of passes, said control system comprising:

  • a main-controller, wherein said main-controller comprises at least one processor and sufficient memory to perform a control algorithm, wherein the main-controller operates in response to said control algorithm, wherein said main-controller is operably connected to;

    a plurality of feed regulators FR(N), a plurality of feed gas regulators FGR(N), a plurality of air regulators AR(N), a plurality of steam regulators SR(N), a plurality of tube temperature measurement devices TT(N), a plurality of output temperature measurement devices OTC(N), and a 3-way valve,wherein a plurality of feed outlet temperature FOT(N) is respectively monitored by the plurality of output temperature measurement devices OTC(N), a plurality of furnace tube temperatures FTT(N) is respectively monitored by the plurality of tube temperature measurement devices TT(N), a plurality of feed input rates FIR(N) is respectively monitored by the plurality of feed regulators FR(N), andwherein said main-controller in response to said control algorithm communicates a control signal to the 3-way valve to direct flow output along a combined output line to a decoke system 180 when a predetermined number of the plurality of feed input rates FIR(N) do not meet or exceed a corresponding plurality of set input feed rates SIFR(N) whereupon said main controller 300 performs a global-decoke procedure.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×