Orwill G Sikora
Engineers at Spanish Oak Dr, Houston, TX

4268246, May 19, 1981

Sep 21, 1979

6/077606

Orwill G. Sikora - Houston TX

Chicago Bridge & Iron Company - Oak Brook IL

F27D 700, F27D 300, C21D 162

432 4

Apparatus comprising a metal shell enclosing a spaced adapted to be heated, low heat retention, thermal shock resistant insulation on one substantially entire surface of the metal shell, a heater to heat the space enclosed by the metal shell, a vent for heated gases from the shell-enclosed space, a conduit and nozzle to supply atomized water into the shell-enclosed space to controllably cool the shell-enclosed space, and a vent for steam from the shell-enclosed space. A method comprising applying a low heat retention, thermal shock resistant insulation on one substantially entire surface of a metal shell enclosing a space, heating the space enclosed by the metal shell by means of hot gases with venting of the hot gases from the shell-enclosed space, supplying atomized water into the shell-enclosed heated space to controllably cool said space, and venting steam from the cooling shell-enclosed space.

4070147, Jan 24, 1978

Apr 1, 1976

5/672733

Orwill Granger Sikora - Houston TX
Donald Sheneman - Spring TX

Chicago Bridge & Iron Company - Oak Brook IL

F27D 100

432 5

A method of heating a closed metal shell defining a tank having top and bottom portions, comprising positioning a substantially vertical metal tube to extend upwardly from about the bottom of the tank to an opening in the tank top, said tube having insulation for retarding heat flow from the tank interior space into the tube interior space, providing the tank top portion with a plurality of hot gas exhaust ports communicating with the tank upper interior space and the atmosphere, positioning a burner in the bottom portion of the tube, firing the burner with a fuel and directing the resulting flame and hot combustion gases from the burner away from the tube to heat the metal shell, and controllably venting hot gases from the tank through the exhaust ports to the atmosphere by a natural-draft stack-effect thereby reducing the pressure in the tube and inducing atmospheric air to flow downwardly into and through the tube to the burner to supply oxygen for combustion of the fuel. An assembly comprising a closed metal shell tank fabricated by welding and requiring post-weld heat treatment, insulation on substantially the entire exterior surface of the tank, a substantially vertical metal tube extending upwardly from the bottom of the tank to an opening in the tank top, said tube having insulation for retarding heat flow from the tank interior space into the tube interior space, a plurality of hot gas exhaust ports in the tank top portion communicating with the tank upper interior space and the atmosphere, and at least one burner in the bottom portion of the tube.