Degussa - Huls Ag

Universitãt Stuttgart

Univeritaet Stuttgart

Gerhard Friedrich

Gerhart Eigenberger

Grigorios Kolios

Dietrich Arntz

Lukas M Von Hippel

Frank Opferkuch

Andreas Freund

Clemens Merten

Jens Bernnat

Volker Schmeisser

Ute Tuttlies

Jorg Frauhammer

A total evaporator for fluids, including a cold chamber to prevent pre-evaporation, an evaporation region connected thereto having narrow flow cross-section for fast evaporation of the fluid, and a subsequent vapor chamber for pulsation damping and the controlled superheating of the vapor, the evaporation region being formed by a gap between concentrically nested cylindrical and/or conical tube sections and heat required for the evaporation and superheating processes is supplied by electric heating and/or by hot fluid and/or by catalytic or homogeneous combustion via the wall of the concentric tubes.

Compact total evaporator and device for carrying out the controlled drying, evaporation and/or reaction of a number of fluids

In a method for purifying exhaust gases in particular from lean-burn internal combustion engines having an exhaust-gas converter with a heat exchanger and catalysts arranged in inflow and/or outflow passages, the heat exchanger exhaust gas which flows in is heated by heat exchange with exhaust gas which flows. The incoming exhaust gas enters the inflow passages without encountering any obstacle susceptible to blockages, and flows through the inflow passages to a diversion region. Heat is fed to the exhaust gas by means of a burner. The burner is operated with fuel, air and engine exhaust gas in such a way that it supplies either an oxidizing or a reducing exhaust gas. Burner exhaust gas is admixed to the gas which emerges from the inflow passages and, together with this gas, enters the outflow passages, where nitrogen oxides are removed from it by a deNOxing catalyst present in the outflow passages.

Method and apparatus for purifying exhaust gases

Reactor heads for the feed and withdrawal of a fuel gas/air mixture and of an educt gas mixture into the heating ducts and reaction ducts respectively of a monolithic countercurrent reactor. The reactor heads are provided with guide pipes, which feed the gas mixtures into the ducts assigned to them and withdraw them from these ducts.

Reactor head for a monolithic co-current or countercurrent reactor

Growing community of inventors

Illingen, Germany

Gerhard Friedrich