Tuyere feed lines

Claim 1

In apparatus for delivering preheated fluid from a source for injection into a furnace, the improvement comprising: fluid injector means, said injector means defining a first conduit section having first and second ends and being adapted to be at least partly inserted into a furnace combustion chamber through an aperture in the furance wall whereby fluid may be discharged into the furnace from said first end of said first conduit section; a lining of refractory material on at least a portion of the wall of said fluid injector means, said refractory material extending longitudinally from said second end of said first conduit section toward said first end and defining the inner diameter of said portion of said first conduit section; nozzle means, said nozzle means defining a second conduit section, said nozzle means including a lining of refractory material which defines the inner diameter of said second conduit section; means rigidly assembling said injector means to said nozzle means whereby said first and second conduit sections are axially aligned and said lining of refractory material on said nozzle means and said lining of refractory material on said fluid injector means cooperate to form a continuous lining and define a fluid passage with a substantially continuous straight wall; and cooler means, said cooler means being installed in the furnace wall about said rigidly assembled injector means and nozzle means, a portion of said cooler means cooperating with said rigidly assembled injector and nozzle means to define a pivot connection therebetween whereby distortions of the delivering apparatus may be accommodated without interruption of the connection established between said cooler means and said rigidly assembled injector and nozzle means.