Process and device for purifying a liquid containing dissolved substances, especially in trace form

• Main Authors: PHILIPPE APTEL, YVES AURELLE, REMI PSAUME
• Format: Patent
• Language: English; French
• Published: 17.06.1988
• Edition: 4
• Subjects: CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

Process and device for the purification of a liquid containing volatile substances dissolved in trace form. This process consists in circulating this liquid in a laminar regime inside capillary fibres 5 whose outer face is in contact with a gas phase, the said fibres comprising an absorbent dense layer permeable to the dissolved substances to be extracted and exhibiting a diameter of substantially between 10 and 1000 microns so as to obtain a reduced liquid stream with a very approximately uniform distribution of the dissolved substances. Furthermore, a low partial pressure of the extracted substances, which is lower than the saturated vapour pressure of the said substances is maintained dynamically in the layers of the gas phase which are close to the fibres 5, so as to regenerate continuously the dense layer of the said fibres. L'INVENTION CONCERNE UN PROCEDE ET UN DISPOSITIF DE PURIFICATION D'UN LIQUIDE CONTENANT DES SUBSTANCES VOLATILES DISSOUTES A L'ETAT DE TRACES. CE PROCEDE CONSISTE A FAIRE CIRCULER CE LIQUIDE, EN REGIME LAMINAIRE A L'INTERIEUR DE FIBRES 5 CAPILLAIRES DONT LA FACE EXTERNE EST AU CONTACT D'UNE PHASE GAZEUSE, LESDITES FIBRES COMPORTANT UNE COUCHE DENSE ABSORBANTE ET PERMEABLE VIS-A-VIS DES SUBSTANCES DISSOUTES A EXTRAIRE ET PRESENTANT UN DIAMETRE SENSIBLEMENT COMPRIS ENTRE 10 ET 1 000 MICRONS DE FACON A OBTENIR UNE VEINE LIQUIDE REDUITE, A REPARTITION TRES APPROXIMATIVEMENT UNIFORME DES SUBSTANCES DISSOUTES. D'AUTRE PART, ON MAINTIENT DYNAMIQUEMENT DANS LES COUCHES DE LA PHASE GAZEUSE VOISINES DES FIBRES 5 UNE BASSE PRESSION PARTIELLE DES SUBSTANCES EXTRAITES, INFERIEURE A LA PRESSION DE VAPEURS SATURANTES DESDITES SUBSTANCES, DE FACON A REGENERER EN CONTINU LA COUCHE DENSE DESDITES FIBRES.