L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des

Frederic Rousseau

Christiane Muller

Jean-Yves Lehman

Jean-Yves Thonnelier

Gilbert Chevalier

Laurent Savinel

Cecile Tosi

Heat exchanger with streaming liquid to vaporize a liquid by heat exchange with a second fluid, of the type comprising a parallelepipedal body formed form an assembly of parallel vertical plates (4) defining between them a multitude of flat passages (18, 19) distributed in an assembly of vaporization passages (18), and in an assembly of heating passages (19). Each passage contains an undulant-spacer (20) with vertical generatrices. Structure for distribution of the liquid is provided at the upper end of the exchanger (2) to distribute the liquid over all the length of the vaporization passages (18). Structure (9) is provided to direct the second fluid into the heating passages (19). The distribution structure is disposed in compartments (23) closed at their upper end and situated each above a heating passage (19), from which the compartment is separated by a horizontal strip (22). A horizontal slot (34) extends over all the length of the exchanger, to just above the strip (22), and places the lower portion of the compartment (23) in free communication with an adjacent vaporization passage (18). The vaporization passages (18) are open at their upper and lower ends, over all their length, and contain at most one undulant-spacer (20A) with vertical generatrices.

Streaming heat exchanger and apparatus for air distillation comprising

In this process for vaporizing a liquid in first ducts, or vaporization ducts, which are opened at top and bottom, of a plate type heat exchanger, by heat exchange with a main calorigenic fluid which circulates in second ducts of the exchanger, additional gas is generated permanently in the lower end part of the first ducts, for example by means of a compartment in which there is a circulation of an auxiliary fluid which is warmer than the main calorigenic fluid. Application to the main vaporizer-condensers of apparatuses for the distillation of air with double column.

Process for vaporizing a liquid, heat exchanger therefor, and

The apparatus comprises a heat exchange line, a fractionating column which is cooled by means of a rich liquid and a section for adiabatic enrichment with nitrogen derived from entering air, the whole being integrated into a parallelepipedal heat exchanger of the plates and blades type. Use for the production of nitrogen of average purity.

Growing community of inventors

Paris, France

Frederic Rousseau