Axel Dr Lippert

Bio: Axel Dr Lippert is an academic researcher from Bayer. The author has contributed to research in topics: Tube (container) & Mixing (physics). The author has an hindex of 6, co-authored 12 publications receiving 120 citations.

Multi-phase flow tube for mixing, reacting and evaporating components

Abstract: An apparatus for mixing, reacting and/or evaporating components in a multi-phase flow tube, comprising a helically wound tube having an inlet pipe in the closed tube periphery and a separation vessel at the end of the tube. The coiled tube is surrounded by a tempering jacket divided into sections.

Process for producing fibre reinforced plastic tubes with flanges

Abstract: A process for producing fibre-reinforced plastic tubes outfitted with flanges, wherein a tube is continuously knit and coated with a duroplastic material in free-flowing form, and the duroplastic material is subsequently hardened. The application of duroplastic material to the knitted tube is halted at intervals for periods which, allowing for the particular rate of production of the plastic tube, correspond to the period of time in which a piece of knitted fabric sufficient for the production of two flanges is produced. The uncoated piece of knitted fabric is cut in the middle and flanges are formed one at a time in a separate operation in which the knitted fabric is stretched radially outwards and impregnated with duroplastic material which thereafter hardens.

Fiber-reinforced plastics tube

Abstract: A plastics tube comprises a duroplastic material with a fiber reinforcement of at least one tubular, endless knitted fabric impregnated with the duroplastic material, wherein the ends of the tube are provided with flanges, the endless tubular knitted fabric extending radially outwards into the flange and being impregnated with a circular insert.

Pneumatische Förderung bei hohen Gutkonzentrationen

Abstract: Die pneumatische Forderung bei niedrigen Gasgeschwindigkeiten ist wegen der Verstopfungsgefahr der Forderleitung normalerweise schwierig. Es wurde daher ein neues Fordersystem mit Nebenleitung entwickelt, das eine stabile Forderung einander folgender Gutpfropfen ermoglicht. Die Forderung arbeitet bei Konzentrationen von mehr als 100 kg Gut/kg Gas und bei Gasgeschwindigkeiten zwischen 2 und 12 m/s. Messungen an einzelnen Propfen und an einer Versuchsforderstrecke klaren die Vorgange bei der Forderung.

Reinforced plastic tube - comprises a knitted tubular sheath impregnated with heat setting resin

Abstract: Resin is coated from an annular extruder onto a rotating former adn a sheath is knitted around the former by a circular knitting head. The resin is cured by heating and a fibre roving is wound round the formers before it is again coated with resin and another sheath knitted around it. The resin may be polyester, and the sheat yarn and roving may be of glass, boron, carbon, or metallic fibres. A uniformly strong tube in both radial and axial directions is economically produced.

Method and apparatus for controlled chemical reactions

Abstract: A method and apparatus for effecting accelerated chemical reactions at elevated temperatures and pressures including wet oxidation of materials in waste streams. An influent waste stream or first reactant is directed through a long tubular coil within a containment vessel with a second reactant being added to the influent. The flow rates for the gas and liquid components of the waste stream are set to cause plug or slug flow of the waste stream through the tubular coil. The curvature of the coil tends to induce a secondary flow in the liquid such that the liquid tends to travel in a spiral thereby providing more intimate mixing of the reactants; and the containment vessel may be partitioned to form a series of successive compartments to permit different temperature gradients to be applied to successive sections of the tubing coil across its length. Alternatively, a tube in tube construction for the tubular coil permits counter current heat exchange betwen the waste stream within the inner tube and the returning stream. Multiple injection and extraction points are provided along the path of the tubular coil to permit gas, liquid or solid reactants to be added or extracted as desired. The tubular coil provides an excellent environmental container for the reaction stream and is extremely suitable for temperature control to permit continuous heat input, autogenic operation and continuous heat extraction.

Liquid vaporizing apparatus

Abstract: A liquid vaporizing apparatus includes a container for holding a liquid at a constant temperature with a temperature adjustment unit and a gas that does not react with the liquid is bubbled through the liquid in the container to vaporize the liquid. The container for holding the liquid has an internal space above the liquid and a second temperature adjustment unit for controlling the temperature of the internal space separately from the temperature of the liquid in the container. Since the internal space is maintained at a constant temperature, higher than the temperature of the liquid, the quantity of the vaporized liquid produced is stable.

Vereinfachte Berechnung horizontaler pneumatischer Förderleitungen bei hoher Gutbeladung mit feinkörnigen Produkten

Abstract: Es werden Berechnungsgleichungen zur Pfropfen- und Ballenforderung aufgestellt, die sich zur raschen Bewaltigung ausgedehnter Versuchs- und Entwicklungsarbeiten bereits gut bewahrt haben. Grundlagenversuche mit einer fur variablen Druck bis 25 at und Gutbeladungen bis 300 eingerichteten Versuchsanlage fuhrten unter Verwendung alterer Ergebnisse von M. Bohnet zu einer neuen Theorie der Strahnenforderung. Diese erlaubt eine einfache und schnelle Berechnung pneumatischer Forderleitungen mit ausreichender Genauigkeit fur praktische Anwendungen.

Apparatus for plasticating thermoplastics

Abstract: A rotatable screw for moving material in a plasticating process along an axis through a conduit from an inlet to an outlet. The screw having a feed section, barrier melting section, reorientation section and metering section disposed sequentially downstream. The screw includes an axial core, and a helical main flight that extends radially from the core and is formed with recesses located at the first periphery and extending through the thickness of the main flight and radially toward the core. A helical secondary flight extends radially from the core between successive helical passes of the main flight, and is formed with recesses extending through the secondary flight and toward the core. Materials conveyed along the metering section can cross through the main flight at the recesses and recirculate, in addition to passing over the periphery of the secondary flight, for still further enhanced and homogenous mixing, before reaching the outlet.