Friedrich Uhde Gmbh

Hans-Dieter Marsch

Heinz-Jochen Keller

Herbert Biskup

A reaction vessel for heating by helium under pressure comprising an upright container provided with an upper part and with a lower part constituting a heating space. In the lower container part are vertically spaced inlet and outlet openings for heated helium under pressure. The upper container part has spaced walls providing a space therebetween and two covers. The upper end of the lower container part is closed and catalyst-filled reaction tubes pass through such closure into the heating space. Inlet and outlet pipes for the reaction tubes extend in coaxial manner from the reaction tubes head through the inner wall of the upper reactor part below the cover of such inner wall, and thence through the space between the inner and outer walls and finally to the outside through the outer wall of the upper part below the cover for the outer wall. The length of the inlet and outlet pipes inside the space is more than the distance of the walls, and the coaxial pipes may be disposed in serpentine fashion.

Reaction vessel heated by helium

A heat exchanger for a nuclear reactor of the cavern type comprises a double walled vessel disposed within a steel liner. The vessel contains a large number of reaction tubes provided with a catalyst through which the material to be reformed flows. The outlet pipes of the reaction tubes act as a heat exchanger in the outer space of the vessel, which is filled with water. The vessel rests upon a bracket on the lower part of the liner, and the space between the liner and vessel in the region of the bracket is sealed by a double flange structure. At the top of the vessel, seal is effected by a cover, membrane ring, and a double flange arrangement. The annular space between the liner and vessel is sealed by a packing against the recycle gas nozzle leading from the interior of the vessel.

Heat exchanger for nuclear reactor installations

A device for performing catalytic endothermic reactions which comprises a vessel having a heat exchanger provided with cooling tubes which extend through an outer tubesheet of the heat exchanger. These tubes are sealed against the outer tubesheet of the heat exchanger, and are connected rigidly to the inner tubesheet. Reaction tubes are provided with catalyst support grids, and the sections of these tubes below the grids are of a length that is at least equal to the diameter of the respective tubes. Downstream of the support grids, the process gas discharge tubes extend centrally through the catalyst-free portions of the reaction tubes and are spaced from the inner walls of the cooling tubes. The spaces between the process gas discharge tubes and the reaction tubes are filled with insulating material. The process gas discharge tubes, which are disposed within the cooling tubes, may extend to or beyond the outer tubesheets of the heat exchanger. The wall thickness of the process gas tubes below the catalyst support grids may be decreased in cross section, thereby decreasing the heat flux to the inner tubesheet.

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Dortmund-Oespel, undefined

Hans-Dieter Marsch