FR2569575A1 - Process and plant for oxygenation in deep water - Google Patents
Process and plant for oxygenation in deep water Download PDFInfo
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- FR2569575A1 FR2569575A1 FR8413562A FR8413562A FR2569575A1 FR 2569575 A1 FR2569575 A1 FR 2569575A1 FR 8413562 A FR8413562 A FR 8413562A FR 8413562 A FR8413562 A FR 8413562A FR 2569575 A1 FR2569575 A1 FR 2569575A1
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- water
- oxygenation
- oxygen
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1278—Provisions for mixing or aeration of the mixed liquor
- C02F3/1294—"Venturi" aeration means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/232—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
- B01F23/2323—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits
- B01F23/23231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits being at least partially immersed in the liquid, e.g. in a closed circuit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
- B01F23/45—Mixing liquids with liquids; Emulsifying using flow mixing
- B01F23/454—Mixing liquids with liquids; Emulsifying using flow mixing by injecting a mixture of liquid and gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
- B01F25/21—Jet mixers, i.e. mixers using high-speed fluid streams with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers
- B01F25/211—Jet mixers, i.e. mixers using high-speed fluid streams with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers the injectors being surrounded by guiding tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/81—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/26—Activated sludge processes using pure oxygen or oxygen-rich gas
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
Description
"PROCEDE ET INSTALLATION D'OX6YGENATION EN EAU PROFONDE"
la presente invention est relative à l'oxygénation en eau profonde."PROCESS AND INSTALLATION OF OX6YGENATION IN DEEP WATER"
the present invention relates to oxygenation in deep water.
Les masses d'eau naturelles ou artificielles de grande profondeur sont soumises à un phencuène périodique de stratification thermique. Natural or artificial water bodies of great depth are subjected to a periodic phencuene of thermal stratification.
Pendant la duree de ce phénomène (de gai à octctre), le transfert naturel de l'oxygène de l'air est limite aux couches superficielles de la masse d'eau (épilinnion) Les couches profondes
Grypolimnion) dépoovues d'oxygène dissous sont alors le siège de fermentations anaérobies des matières organiques accumulées dans la masse d'eau entraînant la disparition de la faune aquatique et l'évolution vers un état eutrophe.During the duration of this phenomenon (from cheerful to octet), the natural transfer of oxygen from the air is limited to the surface layers of the body of water (epilinnion) The deep layers
Grypolimnion) depoovulated with dissolved oxygen are then the site of anaerobic fermentations of organic matter accumulated in the body of water causing the disappearance of aquatic fauna and evolution towards a eutrophic state.
L'apport artificiel et forcé d'oxygène à ces masses d'eau répond au problème posé par l'eutrophisation . t'oxygénation à partir de l'air parfois préconisée constitue une approche économiquement défavorable par rapport à l'utilisation d'oxygène pur. En effet,, dune part l'injection d'air dans l'hypoli"nion nécessite une source d'énergie importante sur le site ma'e (énergie de cempression de l'air), d'autre part l'azote de l'air non utilisé apporte une puissance de brassage qui détruit la stratification et induit alors des conscmma- tions d'oxygène supérieuresà celles des couches profondes seules. The artificial and forced supply of oxygen to these bodies of water responds to the problem posed by eutrophication. oxygenation from air, sometimes recommended, constitutes an economically unfavorable approach compared to the use of pure oxygen. Indeed, on the one hand the injection of air into the hypoli "nion requires an important source of energy on the site ma'e (energy of cempression of the air), on the other hand the nitrogen of l the unused air provides stirring power which destroys the stratification and thus induces oxygen consumption higher than that of the deep layers alone.
te but de 1 invention est de limiter la consommation d'oxygène, et l'énergie utilisée sur le site A cette fin, il est nécessaire de confiner l'oxygénation aux seules couches profondes à l'aide d'un matériel de faible puissance et facilement maniable. De plus, il est indispensable d'éviter la mise en place de canalisations de grande longueur pour véhiculer les couches d'eau profondes, ce type d'opération générant des coûts d'investissement prohibitifs. The object of the invention is to limit the consumption of oxygen, and the energy used on the site. To this end, it is necessary to confine the oxygenation to only the deep layers using a material of low power and easy to handle. In addition, it is essential to avoid the installation of long pipes to convey the deep water layers, this type of operation generating prohibitive investment costs.
Selon l'invention, on a conçu une unité de transfert autonome immergeable dans les couches profondes des masses d'eau, avec un "cordon ombilical" reliant cette unité autonome à l'unité de contrôle sur la berge, pour le transfert de l'énergie électrique et l'apport d'oxygène pur. According to the invention, an autonomous transfer unit has been designed which can be immersed in the deep layers of water bodies, with an "umbilical cord" connecting this autonomous unit to the control unit on the bank, for the transfer of the electrical energy and supply of pure oxygen.
Cette unité autonome assure la répartition de l'oxygène dissous dans toute la couche profonde et met en oeuvre un procédé d'oxygénation en eau profonde, du genre où l'on oxygène un courant primaire que l'on fait ensuite passer dans une tuyère d'entrainement et de mélange d'un courant secondaire, caractérisé en ce que I ' oxygénation du courant primaire est assuré par apport d'oxygéne prélevé d'un stockage sur berge en amont d'une veine dlecoulement à circulation substantiellement verticale ascendante prenant naissance près du fond de l'eau, après quoi, l'eau s'écoule en véhiculant des bulles d'oxygène autour de ladite veine et vers le bas dans une zone de stabilisation, puis ladite eau à forte teneur en oxygène est confinée dans une pluralité de courants répartis circonferentiellement à orientation centrifuge, chacun dans une tuyère d'entraineeent d'eau secondaire. De préférence, les courants à orientation centrifuge sont également orientés à écoulement ascendant, l'angle d'ascendance étant compris entre 50 et 450, et de préférence de l'ordre de 300. This autonomous unit distributes the dissolved oxygen throughout the deep layer and implements an oxygenation process in deep water, of the type where one oxygenates a primary current which is then passed through a nozzle d entrainment and mixing of a secondary current, characterized in that the oxygenation of the primary current is ensured by the supply of oxygen taken from a bank storage upstream of a flow stream with substantially vertical upward circulation originating near from the bottom of the water, after which the water flows carrying oxygen bubbles around said vein and down into a stabilization zone, then said water with high oxygen content is confined in a plurality currents distributed circumferentially in centrifugal orientation, each in a secondary water entrainment nozzle. Preferably, the currents with centrifugal orientation are also oriented with upward flow, the angle of ascent being between 50 and 450, and preferably of the order of 300.
L'invention concerne également une installation d'oxygénation, du genre comprenant un dispositif d'oxygénation à cône d'axe vertical orienté vers le haut, caractérisée en ce qu'il est équipé d'une conduite axiale d'alimentation ouverte à l'eau libre en son extrémité inférieure et pourvue d'un moyen d'injection d'oxygène sous forme de bulles, ledit cône étant en outre équipé d'une pluralité de conduits radiaux débouchant chacun dans une tuyère d'entrainement d'eau secondaire. Dans une variante de réalisation, les conduits radiaux sont également orientes vers le haut. The invention also relates to an oxygenation installation, of the type comprising an oxygenation device with a cone of vertical axis oriented upwards, characterized in that it is equipped with an axial supply line open to the free water at its lower end and provided with a means for injecting oxygen in the form of bubbles, said cone being furthermore equipped with a plurality of radial conduits each opening into a secondary water entrainment nozzle. In an alternative embodiment, the radial conduits are also oriented upwards.
L'invention est maintenant décrite, à titre d'exemple en référence aux dessins annexés dans lesquels
- la figure 1 est une vue en élévation de l'unité autonome ;
- la figure 2 est une vue la dessus
- la figure 3 est une vue sohematique d'implantation dans un
lac.The invention is now described, by way of example with reference to the accompanying drawings in which
- Figure 1 is an elevational view of the autonomous unit;
- Figure 2 is a top view
- Figure 3 is a sohematic view of implantation in a
lake.
En se référant aux dessins, une unité autonome d'oxygénation est constituée par un cône 1, la pointe 2 dirigée vers le haut, prolongé à sa base par une virole 3, fermée par un fond -bombe 4 ; la hauteur totale de cette partie est égale à 2,5 m pour une capacité de pompage primaire de 300 m3 /h. te cône 1 est alimente en débit primaire par l'interdddiaire d'une colonne centrale 5 raccordée dans sa partie inférieure au refoulement d'une pompe primaire 8. Referring to the drawings, an autonomous oxygenation unit is constituted by a cone 1, the point 2 directed upwards, extended at its base by a ferrule 3, closed by a bottom -bomb 4; the total height of this part is 2.5 m for a primary pumping capacity of 300 m3 / h. the cone 1 is supplied with primary flow through a central column 5 connected in its lower part to the discharge of a primary pump 8.
Dans cette partie inférieure et à l'extérieur du cône se situe l'injecteur d'oxygène pur constitue par une couronne 10 concentrique à la colonne centrale 5 et percée de trous de car'unication pour le passage du gaz entre cette couronne et la colonne centrale, et alimentée par une conduite il Il aboutissant à la berge, un poste de stockage d' oxygène 30, avec d'ailleurs un cable électrique pour la pompe 8 aboutissant à un poste électrique 31. In this lower part and outside the cone is located the pure oxygen injector constituted by a crown 10 concentric with the central column 5 and pierced with car'unication holes for the passage of gas between this crown and the column central, and supplied by a pipe there It ending at the bank, an oxygen storage station 30, with besides an electric cable for the pump 8 ending at an electric station 31.
te débit primaire contenant 1'oxygène dissous est évacué du cône par deux orifices dianétralement opposés 12, 13 de diamètre 0,1 m. The primary flow containing the dissolved oxygen is evacuated from the cone by two diametrically opposite orifices 12, 13 with a diameter of 0.1 m.
tes orifices 12, 13 du cône Immerge sont prolongés par un tuyau 14, 15 formant un angle a par exemple 300 entre son axe et le plan horizontal. your orifices 12, 13 of the Immerge cone are extended by a pipe 14, 15 forming an angle a for example 300 between its axis and the horizontal plane.
L'extrémité de ou tuyau comporte une buse conique convergente 16, 17 dont l'orifice à un diamètre de 0,06 m. The end of or pipe has a converging conical nozzle 16, 17 whose orifice has a diameter of 0.06 m.
Cette buse 16717 débouche dans une tuyère 18, 19 constitué d'un tuyau ayant par exemple une longueur de 1,2 m et de diamètre 0,4 r m. This nozzle 16717 opens into a nozzle 18, 19 consisting of a pipe having for example a length of 1.2 m and a diameter of 0.4 r m.
La tuyère 18, 19 est maintenue solidaire de 17ensemble par l'intermédiaire d'un chassis rigide 20,21 dont une extrêmité est accrochée par un cable 22, 23 à la partie supérieure du cône
L'angle des tuyaux 14, 15 par rapport au plan horizontal et leur longueur L sont détenminés de telle manière que le courant de mélange et de diffusion induit par les éjecteurs reste confiné aux couches profondes de la masse d'eau, comme il ressort de la figure 3 où on a indiqué un A l'hypolimion et un B l'épilimmion séparés entre eux par la thermocline C ; les flèches f représentent les circulations d'eaux issues des tuyères 18, 19.The nozzle 18, 19 is held integral with the assembly by means of a rigid frame 20, 21 of which one end is hooked by a cable 22, 23 to the upper part of the cone
The angle of the pipes 14, 15 relative to the horizontal plane and their length L are determined in such a way that the mixing and diffusion current induced by the ejectors remains confined to the deep layers of the body of water, as can be seen from Figure 3 where we indicated an A hypolimion and a B the epilimmion separated between them by the thermocline C; the arrows f represent the water flows from the nozzles 18, 19.
L'angle a est fonction de la hauteur de la thermocline (Hl
HO) au-dessus du fond.The angle a is a function of the height of the thermocline (Hl
HO) above the bottom.
Ainsi cet angle a est d'autant plus réduit que cette profondeur (Hi - Ho) plus faible. Thus this angle a is all the more reduced as this depth (Hi - Ho) is smaller.
La longueur L est fonction de la surface de la couche d'eau profonde à oxygéner. The length L is a function of the surface of the deep water layer to be oxygenated.
Le procédé et le matériel d'application décrits cidessus, appliqués à une retenue d'eau artificielle, d'un volume total de 7 000 000 m3 d'eau dont 1 850 000 dans les couches profondes (H1 = 12 m,
HO = 32 nX, sont constitués par trois unités autonomes immergées et d'une unité de contrôle sur berge.The application process and equipment described above, applied to an artificial water reservoir, with a total volume of 7,000,000 m3 of water, 1,850,000 of which is in the deep layers (H1 = 12 m,
HO = 32 nX, consist of three autonomous submerged units and a bank control unit.
Les trois unités immergées sont réparties sur une longeur totale de 1 000 m, la largeur de la retenue étant d'environ 15G m. La surface de traitement concernée par chaque unité est de l'ordre de 50 000 m2, soit un volume de 600 000 m3 d'eau, les capacités de pompage étant respectivement 300 m3 /h pour le primaire et 2 000 m3 nh pour le secondaire. The three submerged units are distributed over a total length of 1,000 m, the width of the reservoir being approximately 15 G m. The treatment surface concerned by each unit is of the order of 50,000 m2, i.e. a volume of 600,000 m3 of water, the pumping capacities being respectively 300 m3 / h for the primary and 2,000 m3 nh for the secondary .
La capacité de transfert, compte tenu de la profondeur d'imaersion, est variable de 0 à 600 kg oxygène par jour. The transfer capacity, taking into account the immersion depth, is variable from 0 to 600 kg oxygen per day.
Sur ces installations les valeurs de a et LS sont
a = 700
LS = I m
Cette capacité de transfert maximale appliquée aux trois unités intallées permet de maintenir une concentration en oxygène dissous prise entre 3 et 6 mg/l dans les couches profondes (hypolImnion3. On these installations the values of a and LS are
a = 700
LS = I m
This maximum transfer capacity applied to the three intalled units makes it possible to maintain a concentration of dissolved oxygen taken between 3 and 6 mg / l in the deep layers (hypolImnion3.
L'apport spécifique (kg 02/kwh) optimal obtenu avec les unités est de l'ordre de 2 kg 02/kwh. The optimal specific contribution (kg 02 / kwh) obtained with the units is of the order of 2 kg 02 / kwh.
Le rendement de transfert (02 dissous/02 injecté) est voisin de 100 %. The transfer yield (dissolved 02 / injected 02) is close to 100%.
Les domaines d'application du procédé sont l'oxygénation des couches d'eau profonde des retenues d'eau naturelles ou artificielles, l'oxygénation de bassin-tampon de station d'épuration, Iroxygénation de bassin d'activation de station d'épuration, l'oxygénation de rivières. The fields of application of the process are the oxygenation of the deep water layers of natural or artificial water reservoirs, the oxygenation of the treatment plant buffer basin, Iroxygenation of the treatment plant activation basin , the oxygenation of rivers.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8413562A FR2569575B1 (en) | 1984-09-03 | 1984-09-03 | DEEP-WATER OXYGENATION PROCESS AND PLANT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8413562A FR2569575B1 (en) | 1984-09-03 | 1984-09-03 | DEEP-WATER OXYGENATION PROCESS AND PLANT |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2569575A1 true FR2569575A1 (en) | 1986-03-07 |
| FR2569575B1 FR2569575B1 (en) | 1990-02-16 |
Family
ID=9307389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8413562A Expired - Fee Related FR2569575B1 (en) | 1984-09-03 | 1984-09-03 | DEEP-WATER OXYGENATION PROCESS AND PLANT |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2569575B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000071235A1 (en) * | 1999-05-20 | 2000-11-30 | Stem Drive Limited | Fluid mixing system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1142557A (en) * | 1956-02-07 | 1957-09-19 | Pepin Fils | Device for mixing liquids and in particular liquid foodstuffs |
| FR2140125A1 (en) * | 1971-06-01 | 1973-01-12 | Atlas Copco Ab | |
| US3968086A (en) * | 1970-06-12 | 1976-07-06 | Atara Corporation | Double funnel device for oxygenating sewage |
| FR2397870A1 (en) * | 1977-07-18 | 1979-02-16 | Coorens Antoine | Hydraulically operated ejector unit esp. for packages - has propelling agent inlet connected between inner discs forming mouthpiece and medium between outer ones |
| DE3150834A1 (en) * | 1980-12-22 | 1982-07-29 | O.Wenaweser + Dr.R.Wolfensberger AG, 8034 Zürich | Process and equipment for treating stagnant waters |
-
1984
- 1984-09-03 FR FR8413562A patent/FR2569575B1/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1142557A (en) * | 1956-02-07 | 1957-09-19 | Pepin Fils | Device for mixing liquids and in particular liquid foodstuffs |
| US3968086A (en) * | 1970-06-12 | 1976-07-06 | Atara Corporation | Double funnel device for oxygenating sewage |
| FR2140125A1 (en) * | 1971-06-01 | 1973-01-12 | Atlas Copco Ab | |
| FR2397870A1 (en) * | 1977-07-18 | 1979-02-16 | Coorens Antoine | Hydraulically operated ejector unit esp. for packages - has propelling agent inlet connected between inner discs forming mouthpiece and medium between outer ones |
| DE3150834A1 (en) * | 1980-12-22 | 1982-07-29 | O.Wenaweser + Dr.R.Wolfensberger AG, 8034 Zürich | Process and equipment for treating stagnant waters |
Non-Patent Citations (1)
| Title |
|---|
| GWF-WASSER/ABWASSER, vol. 119, no. 2, février 1978, pages 65-71; K. BUCKSTEEG et al.: "Versuche zur Bestimmung der Leistungsf{higkeit eines Ger{tes zur Tiefenwasserbel}ftung von Seen" * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000071235A1 (en) * | 1999-05-20 | 2000-11-30 | Stem Drive Limited | Fluid mixing system |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2569575B1 (en) | 1990-02-16 |
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