Linde Aktiengesellschaft

Linde Gmbh

Gerhard Zapp

Christian Kunz

Michael Siebel

Nicolas Blum

Stefan Lenz

The process and the apparatus serve for the low-temperature fractionation of air in a distillation column system, which has at least one separating column. Feed air is compressed in a main air compressor. Compressed feed air is cooled in a main heat exchanger. Cooled feed air is introduced into the distillation column system. At least one product stream is drawn off from the distillation column system, heated in the main heat exchanger and drawn off as a gaseous end product. At least one process parameter is set by a basic controller. The control of the process parameter is set by a combination of an ALC control and an MPC controller. This involves the ALC control outputting a first target value to the MPC controller.

Process and apparatus for the low-temperature fractionation of air

The process and the apparatus serve for separating a gas mixture in a separation plant. A feed gas ( ) is introduced into a compressor system ( ) and then into the separation plant. In the event of loss or partial loss of the compressor system ( ) of the first feed gas compressor ( ), a first auxiliary stream ( ) which has approximately the composition of the first product stream or approximately the composition of the feed gas is compressed ( ) to at least approximately the first pressure and is recirculated to the separation plant.

Growing community of inventors

Pullach, Germany

Gerhard Zapp