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A GAS-LIQUID ABSORBER WITH AN INTEGRATED HEAT-EXCHANGER FOR REACTIONS WITH A VERY HIGH THERMAL EFFECT.

Ziel

THE OBJECTIVE IS TO DESIGN A NEW TYPE OF ABSORBERS-REACTORS, TO BUILD EXPERIMENTAL MODELS, TO TEST THEM AT A PILOT SCALE, IN THE CHEMICAL ENGINEERING LABORATORY, AND TO ASSESS THEIR ECONOMIC FEASIBILITY, AS COMPARED TO CONVENTIONAL SYSTEMS. DUE TO A BETTER CONTROL OF THE TEMPERATURE PROFILE ALONG THE ABSORBER, THE ENERGY EFFICIENCY OF THE ABSORBER WILL BE STRONGLY IMPROVED.

APPARATUS PRINCIPLE :
THE GAS LIQUID ABSORBER WILL BE MADE OF A VERTICAL CYLINDRICAL COLUMN IN WHICH IS PLACED A BUNDLE OF HOLLOW VERTICAL FINS. A HEAT CARRIER FLUID FLOWS IN THE FINS TO EXTRACT THE REACTION HEAT. BETWEEN THE FINS ARE INSERTED POROUS "PACKINGS" MADE OF PILES OF CORRUGATED PUNCHED METAL SHEETS. A LIQUID DISTRIBUTOR, PUT ON THE TOP, UNIFORMLY SPRINKLES THIS POROUS PACKING, WITH THE ABSORBING LIQUID.

THE WORK WILL INCLUDE FOUR PARTS :
1.- MODELLING AND OPTIMIZATION :
THE OPTIMIZED POROUS PACKING SHOULD RESULT FROM THE BEST COMPROMISE BETWEEN THE FOLLOWING CHARACTERISTICS :
. GOOD HORIZONTAL CONDUCTANCE FOR HEAT
. GOOD VERTICAL PERMEABILITY FOR THE STREAMING LIQUID FILM
. GOOD HORIZONTAL PERMEABILITY FOR THE ABSORBABLE GAS
. GOOD EFFICIENCY AS A TURBULENCE PROMOTER
. GOOD MECHANICAL RIGIDITY

2.- CONSTRUCTION OF A NUMBER OF EXPERIMENTAL MODEL :
IT WILL BE MADE BY THE "TREFIMETAUX" COMPANY, WITH VARIOUS DIMENSIONS OF THE HOLLOW FINS AND OF THE METALLIC POROUS MATRICES.

3.- EXPERIMENTATION :
THE BATTERIES OF HOLLOW FINS WITH THEIR INSERTED POROUS MATRICES WILL BE TESTED IN A VAPOUR/LIQUID ABSORPTION UNIT ALREADY IN USED IN THE LABORATORY. THE ENTHALPY AND ENERGY BALANCES WILL BE SPECIALLY MEASURED. THE EFFICIENCY OF EACH SYSTEM WILL BE EXPRESSED WITH THE DIMENSIONLESS RATIO : ENERGY CONSUMPTION PER UNIT OF HEAT TRANSFER.

4.- APPLICATIONS - ROUGH ESTIMATION OF ECONOMIC FEASIBILITY :
THREE MAIN TYPES OF APPLICATIONS WILL BE STUDIED :

. ABSORPTION OF H2O IN LIBR SOLUTION, AND OF NH3 IN WATER FOR ABSORPTION HEAT PUMP,
. SULFONATION OF ORGANIC COMPOUND IN A PARTIALLY ADIABATIC ABSORBER,
. COUNTER-CURRENT GAS ABSORBER COLUMN, FOR ABSORPTION OF DILUTE VAPOURS.
. THIS NEW TECHNOLOGY SHOULD LEAD TO MODULATED UNITS, EASY AND CHEAP TO BUILD AND ASSEMBLE IN LARGE SERIES.

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Finanzierungsplan

CSC - Cost-sharing contracts

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Centre de Recherches d'Innovations et de Formations pour Ingénieurs et Cadres
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Letzte Aktualisierung: 23 Januar 1994

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Permalink: https://cordis.europa.eu/project/id/EN3E0041/de

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