IT8224898A1 - Procedure for putting liquids in contact with gases - Google Patents
Procedure for putting liquids in contact with gases Download PDFInfo
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- IT8224898A1 IT8224898A1 IT1982A24898A IT2489882A IT8224898A1 IT 8224898 A1 IT8224898 A1 IT 8224898A1 IT 1982A24898 A IT1982A24898 A IT 1982A24898A IT 2489882 A IT2489882 A IT 2489882A IT 8224898 A1 IT8224898 A1 IT 8224898A1
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- liquid jet
- liquid
- gases
- gas
- nozzle
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- 239000007788 liquid Substances 0.000 title claims description 57
- 239000007789 gas Substances 0.000 title claims description 31
- 238000000034 method Methods 0.000 title claims description 25
- 230000001427 coherent effect Effects 0.000 claims description 7
- 238000005265 energy consumption Methods 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 238000010564 aerobic fermentation Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000009903 catalytic hydrogenation reaction Methods 0.000 description 1
- KTVIXTQDYHMGHF-UHFFFAOYSA-L cobalt(2+) sulfate Chemical compound [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- 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
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
- A01K63/042—Introducing gases into the water, e.g. aerators, air pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- 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
- B01F23/234—Surface aerating
-
- 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
- B01F23/234—Surface aerating
- B01F23/2341—Surface aerating by cascading, spraying or projecting a liquid into a gaseous atmosphere
- B01F23/23413—Surface aerating by cascading, spraying or projecting a liquid into a gaseous atmosphere using nozzles for projecting the liquid into the gas atmosphere
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J10/00—Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/26—Nozzle-type reactors, i.e. the distribution of the initial reactants within the reactor is effected by their introduction or injection through nozzles
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
- C12M29/06—Nozzles; Sprayers; Spargers; Diffusers
-
- 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)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Environmental Sciences (AREA)
- Zoology (AREA)
- Wood Science & Technology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Environmental & Geological Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- Sustainable Development (AREA)
- Analytical Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Biochemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Marine Sciences & Fisheries (AREA)
- Animal Husbandry (AREA)
- Hydrology & Water Resources (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Nozzles (AREA)
- Activated Sludge Processes (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
D E SCR IZ IONE DESCRIPTION
dell 'invenzione avente il titolo: of the invention having the title:
"Procedimento per mettere a contatto dei liquidi con dei gas" "Procedure for putting liquids in contact with gases"
RIASSUNTO DELL'INVENZIONE SUMMARY OF THE INVENTION
L'invenzione si riferisce ad un procedimento per mettere a contatto dei liquidi con dei gas mediante introduzione di un getto di liquido coerente attraverso un ugello ad alta velocit? nel liquido attraverso lo strato di gas. Secondo l'invenzione il get to liquido ? emesso dall'ugello ad una velocit? di 20-38 m/s e con un numero di-Reynolds di almeno 400 '000 e la lunghezza del percorso libero del getto liquido ? mantenuto ad un valore di almeno 15 volte il diametro del getto liquido. The invention relates to a process for bringing liquids into contact with gases by introducing a jet of coherent liquid through a high-speed nozzle. in the liquid through the gas layer. According to the invention, the liquid jet? emitted from the nozzle at a speed? of 20-38 m / s and with a Reynolds number of at least 400 '000 and the length of the free path of the liquid jet? maintained at a value of at least 15 times the diameter of the liquid jet.
Il procedimento secondo l'invenzione consente di mettere a contatto dei liquidi con dei gas in una maniera semplice e poco costosa e con un aumentato tasso di trasferimento di massa nonch? con un consu mo pi? basso di energia di quanto fosse possibile finora. The process according to the invention allows liquids to be brought into contact with gases in a simple and inexpensive way and with an increased rate of mass transfer as well as in the form of gases. with a consu mo more? lower energy than previously possible.
SPIEGAZIONE PELI'INVENZIONE EXPLANATION OF THE INVENTION
L'invenzione si riferisce ad un procedimento per mettere dei liquidi a contatto con dei gas, mediante introduzione,di un getto liquido coerente per il tramite di un ugello attraverso lo strato di gas a velocit? elevata dentro al liquido. The invention relates to a process for putting liquids into contact with gases, by introducing a coherent liquid jet through a nozzle through the gas layer at high speed. elevated within the liquid.
Principalmente come conseguenza della crescente quantit? di effluenti da depurare, e dei progressi della biotecnologia, in anni recenti vi ? una richijs sta sempre pi? impellente di procedimenti nuovi per la messa a contatto fra gas liquidi i quali possono rispondere dal punto di vista economico alle varie esigenze per aumentare la capacit? delle apparecchia ture, per diminuire gli investimenti specifici ed i costi energetici, e per ridurre i tempi di reazione e di sosta, relativi ai r?attori misti generalmente usati finora. Nemmeno uno dei procedimenti noti pu? in pratica soddisfare tutte queste esigenze. Mainly as a consequence of the growing quantity? of effluents to be purified, and the progress of biotechnology, in recent years there? a recluse is always more? urgent of new procedures for the contact between liquid gases which can respond from the economic point of view to the various needs to increase the capacity? of equipment, to reduce specific investments and energy costs, and to reduce reaction and stop times, relating to the mixed actors generally used up to now. Not even one of the known procedures can? basically satisfy all these needs.
K. Sdiliger1 (Chem.-Ing. Tech.52_, 951-965 /1980/) fornisce una buona rassegna dei metodi noti . Secondo qiesto autore, i contattori gas-liquido noti si possono classificare a seconda del metodo del trasferimento di energia nei gruppi seguenti: K. Sdiliger1 (Chem.-Ing. Tech.52_, 951-965 / 1980 /) provides a good review of the known methods. According to this author, known gas-liquid contactors can be classified according to the method of energy transfer into the following groups:
- sistemi meccanici, - mechanical systems,
- sistemi a compressore, - compressor systems,
- sistemi a pompa, - pump systems,
e loro combinazioni and their combinations
Un raffronto fra i differenti sistemi di contattazione gas-liquido.lo si eseguisce in pratica in ba se al tasso di trasferimento di massa, in base al consumo specifico di energia del trasferimento di' massa, i e in base alla dipendenza dalla viscosit? di que.sti I due fattori. In generale si pu? dire dei sistemi Loti che nel caso dei liquidi ad alta viscosi, t?, essi sistemi non possono simultaneamente soddisfare le esigenze di elevati tassi di trasferimento di massa e il requisito di consumo di energia minima A comparison between the different gas-liquid contact systems is carried out in practice on the basis of the rate of mass transfer, on the basis of the specific energy consumption of the mass transfer, and on the basis of the dependence on viscosity. of these The two factors. In general you can? say of Loti systems that in the case of high viscous liquids, t ?, they systems cannot simultaneously meet the requirements of high mass transfer rates and the requirement of minimum energy consumption
Nella maggior parte dei sistemi basati sul contatto gas-liquido, il tasso del trasferimento di massa fra la fase gassosa e la fase liquida equivale al procedimento pi? lento e questo tasso detenni, na anche i tempi delle altre reazioni. Un aumento nel tasso del trasferimento di massa consente una diminuzione significativa dei tempi di reazione, ac compagnata in molti casi da una riduzione del .volume operazionale del sistema. In casi in cui un aumento della concentrazione ? reso possibile da un aumen to del tasso di trasferimento di massa ed ? ac compagnato da un aumento della viscosit?, ? molto importante assicurare che il funzionamento del sisterna dipenda soltanto in una misura limitata dalla viscosi t? della fase liquida. Generalmente i sistemi noti non possono soddisfare questa esigenza. In most systems based on gas-liquid contact, the rate of mass transfer between the gas phase and the liquid phase is equivalent to the pi? slow and this rate also determines the timing of the other reactions. An increase in the rate of mass transfer allows for a significant decrease in reaction times, accompanied in many cases by a reduction in the operational volume of the system. In cases where an increase in concentration? made possible by an increase in the rate of mass transfer and? accompanied by an increase in viscosity,? It is very important to ensure that the operation of the system depends only to a limited extent on the viscosity t? of the liquid phase. Known systems generally cannot satisfy this requirement.
Fra i sistemi noti "basati sul funzionamento a pompa, va trovando,crescente Impiego una variante aven te un getto liquido a tuffo o impatto. E' caratteri stico di tali sistemi che il gas e fatto passare nel liquido con l'aiuto dell'impatto di un getto tuffant Ie dall'alto, mentre il liquido stesso ? fatto circolare. Sono noti due tipi,di sistemi siffatti - il trascinamento del gas ? ottenuto con una pom pa a getto liquido; in questo caso, il gas ? disperso nel getto liquido prima dell'impatto (brevetto della Repubblica Democratica Tedesca K? 56763); Among the known systems "based on pump operation, a variant having a plunging or impact liquid jet is finding increasing use. It is characteristic of such systems that the gas is passed into the liquid with the help of the impact. of a plunging jet from above, while the liquid itself is circulated. Two types of such systems are known - the entrainment of the gas is obtained with a liquid jet pump; in this case, the gas is dispersed in the jet liquid before impact (German Democratic Republic patent K? 56763);
- il gas ? portato 'dentro al liquido meccanicamente per effetto della ruvidit? di superficie del getto liquido coerente libero passante attraverso lo strato di gas; in questo caso la dispersione primaria del gas ha luogo dopo l'impatto (X. Schtigerl: - the gas ? brought into the liquid mechanically due to the roughness? surface of the free coherent liquid jet passing through the gas layer; in this case the primary dispersion of the gas takes place after the impact (X. Schtigerl:
Chem. -Ing. Tech. 52., 956 /198?/). Chem. -Ing. Tech. 52., 956/198? /).
Lo svantaggio fondamentale'dei procedimenti noti ohe adottano quest'ultimo principio sta nel fatto che un aumento della velocit? del getto liquido cau sa una I riduzione repentina della quantit? del gas sciolta per unit? di energia (E. van de Sande e J.M. .Smith, Chem. Eng.J. jK), 225-233 /1975/, figura 6) mentre la.profondit? di penetrazione dei getto li' quido ? cos? piccolo, nell'intervallo delle velocit? basse energeticamente vantaggiose del getto li-, quido (al di sotto di 5 m/s) da far s? che l'uso pra tico, specie l'uso .su grande scala industriale, ne viene considerevolmente ristretto (Chem.Eng.J. 10, 231 /1975/). E' attribuibile a questo fatto che l'efficacia di tali procedimenti realizzati in pratica ? pi? bassa di quella dei contattori gas-liquido di altri tipi (Chem.Ing.Tech. _52_, 951-965 /1980/, Tabella II). The fundamental disadvantage of the known processes which adopt the latter principle is that an increase in speed of the liquid jet causes a sudden reduction in the quantity? of the gas dissolved per unit? of energy (E. van de Sande and J.M.. Smith, Chem. Eng.J. jK), 225-233 / 1975 /, figure 6) while the. of penetration of the jet li 'liquid? cos? small, in the range of speeds? low energetically advantageous of the liquid jet (below 5 m / s) to be done s? that its practical use, especially its use on a large industrial scale, is considerably restricted (Chem.Eng.J. 10, 231/1975 /). Is it attributable to this fact that the effectiveness of such procedures carried out in practice? pi? lower than that of gas-liquid contactors of other types (Chem.Ing.Tech. _52_, 951-965 / 1980 /, Table II).
L'invenzione cerca di realizzare un procedimento che elimini o riduca gli svantaggi delle soluzioni note e renda possibile il mettere a contatto liquidi con gas in una maniera semplice e non dispendiosa pur raggiungendo maggiori tassi di trasferimento di massa e consumi di energia pi? bassi di quanto fosse possibile finora. The invention seeks to provide a process which eliminates or reduces the disadvantages of known solutions and makes it possible to put liquids in contact with gas in a simple and inexpensive way while achieving higher mass transfer rates and higher energy consumption. lower than was previously possible.
L'invenzione ? basata sulla scoperta che la effi cienza e le caratteristiche di un sistema si possono grandemente migliorare se la velocit? del getto liquido raggiunge o supera il valore di 20 m/s e se il numero di Reynolds del getto liquido nell'abbandonare l'ugello del getto raggiunge o supera il valore di 400'000. Questa scoperta ? sorprendente per che ih base alla nota relazione fra la velocit? del getto liquido e l'assorbimento specifico di gas c 'era da aspettarsi che con tali valori di velocit? del g?tto liquido la quantit? del gas scioglibile diminuisse anzich? aumentare. The invention? based on the discovery that the efficiency and characteristics of a system can be greatly improved if the speed? of the liquid jet reaches or exceeds the value of 20 m / s and if the Reynolds number of the liquid jet in leaving the jet nozzle reaches or exceeds the value of 400,000. This discovery? surprising for that the basis of the known relationship between the velocity? of the liquid jet and the specific absorption of gas c 'it was to be expected that with such values of velocity? of the liquid g? tto the quantity? of the dissolvable gas decreased instead? increase.
Una base ulteriore dell'invenzione ? la scoperta che la quantit? di .che pu? essere sciolta per unit? di energia pu? essere ulteriormente aumentata se la'lunghezza del percorso libero del getto liqui^ do coerente raggiunge o supera 15 volte il diametro del getto liquido. A further basis of the invention? the discovery that the quantity? of .what can? be dissolved per unit? of energy can? be further increased if the length of the free path of the coherent liquid jet reaches or exceeds 15 times the diameter of the liquid jet.
Pertanto l'invenzione si riferisce ad un procedi mento per portare a contatto dei liquidi con dei gas, in cui un getto liquido coerente ? introdotto ad alta velocit? da un ugello attraverso uno strato di gas e dentro al liquido. Secondo l'invenzione, il get o liquido ? emesso dall'ugello ad una veloci_ t? di 20-38 m/s, preferibilmente a 24-28 m/s, e con un numero di Reynolds di almeno 400'000, e la lunghezza, del percorso libero del getto liquido ? mantenuta ad un valore di almeno 15 volte, preferibilmente di 20-25 volte, il diametro del getto liquido, II procedimento dell'invenzione ? largamente applicabile per mettere a contatto intimo i pi? svariati ?liquidi, per esempio soluzioni o sospensioni, e gas o miscugli di gas. Come esempi di possibili applicazioni, si possono citare la fermentazione ae robica la purificazione aerobica di effluenti biologici) l'aerazione di 'vasche per pesci, le reazioni fra gas e liquidi catalitiche, per esempio la idrogenazione catalitica, e la purificazione di gas mediante assorbimento. Therefore the invention relates to a process for bringing liquids into contact with gases, in which a coherent liquid jet? introduced at high speed? from a nozzle through a layer of gas and into the liquid. According to the invention, the get or liquid? emitted from the nozzle at a speed_ t? of 20-38 m / s, preferably at 24-28 m / s, and with a Reynolds number of at least 400,000, and the length, of the free path of the liquid jet? maintained at a value of at least 15 times, preferably 20-25 times, the diameter of the liquid jet, the process of the invention? widely applicable to put in intimate contact the most? various liquids, for example solutions or suspensions, and gases or gas mixtures. As examples of possible applications, aerobic fermentation, aerobic purification of biological effluents) aeration of fish tanks, reactions between gases and catalytic liquids, for example catalytic hydrogenation, and purification of gas by absorption can be cited. .
I vantaggi principali del procedimento dell'invenzione sono i'seguenti: The main advantages of the process of the invention are the following:
(a) Un aumento significativo nel tasso del trasfe rimento di massa rispetto ai procedimenti noti, diventa possibile col procedimento secondo l'invenzio ne che consente un tasso massimo di trasferimento dell'ossigeno dall'aria pari a.50?55 kg di O2/m<3>.ora, che e un multi-plo della quantit? di ossigeno che pu? essere fatta sciogliere con apparecchiature note. (a) A significant increase in the rate of mass transfer with respect to known processes becomes possible with the process according to the invention which allows a maximum rate of oxygen transfer from air equal to 50? 55 kg of O2 / m <3> .ora, which is a multiple of the quantity? of oxygen that can? be dissolved with known equipment.
(b) L'elevato tasso del trasferimento di massa consente di ridurre in misura significativa il volume del reattore e di aumentare in proporzione la concentrazione- del prodotto. (b) The high rate of mass transfer enables the reactor volume to be significantly reduced and the product concentration to be proportionally increased.
(c) l'invenzione rende possibile un consumo ener getico specifico vantaggioso; per sciogliere 1 kg di O2, si richiedono da 0,17 a 0,38 kWh di energia. (c) the invention makes possible an advantageous specific energy consumption; to dissolve 1 kg of O2, 0.17 to 0.38 kWh of energy are required.
(d) Il trasferimento di massa diventa particolar mente indipendente dalla viscosit? del liquido, in un ampio intervallo. (d) Does the mass transfer become particularly independent of viscosity? of the liquid, over a wide range.
(e) Diventa possibile un tasso estremamente elevato di utilizzazione del gas, col che un dato tasso di trasferimento di massa pu? essere raggiunto con un impegno di gas di molto minore e, quindi, con una migliore utilizzazione dei volumi. (e) An extremely high rate of gas utilization becomes possible, with which a given rate of mass transfer can? be achieved with a much lower gas commitment and, therefore, with a better utilization of volumes.
(f) II procedimento si pu? utilizzare con una ap parecchiatura estremamente semplice, con costi di investimento e di manutenzione bassi. (f) Is the procedure possible? use with an extremely simple equipment, with low investment and maintenance costs.
(g?) Si pu? realizzare un aumento nelle dimensioni dell1apparecchiatura con una simultanea riduzione del consumo energetico specifico del trasferimen to di massa. (g?) You can? realize an increase in the size of the equipment with a simultaneous reduction of the specific energy consumption of the mass transfer.
Nel procedimento pu? essere impiegato qualsiasi tipo di ugello atto a produrre un getto liquido coerente. Al fine di ridurre le perdite di flusso ? vantaggioso impiegare il cosiddetto "jet-pipe" ("tubo a getto") di profilo a paraboloide-iperboloide, in uso nelle turbine Pelton. In the proceedings can? any type of nozzle capable of producing a coherent liquid jet may be used. In order to reduce flow losses? It is advantageous to use the so-called "jet-pipe" ("jet pipe") with a paraboloid-hyperboloid profile, used in Pelton turbines.
Il procedimento dell'invenzione a inoltre illustrato dai seguenti esempi non limitativi. The process of the invention is further illustrated by the following non-limiting examples.
ESEMPIO 1 EXAMPLE 1
Si introdussero 0,2 m<3 >di una soluzione di solfi to di sodio-0,5 H in un recipiente avente una altez za di 2,5 m ed un diametro di 0,45 m e si fecero circolare attraverso un ugello di 0,02 m di diametro in presenza di .0,001 mol/litro di catalizzatore al solfakto di cobalto. Con l'aiuto di un getto liquido| avente- una velocit? di 22 , 5 m/s (????? = 450 ' 000) ed una lunghezza di percorso libero di 0,4 m, il tas so di trasferimento dell'ossigeno dall'aria a pressione atmosferica, era di 49?2 kg 02/m<3>.ora, misura to co In un metodo basato sull'ossidazione del solfito di sodio (V?. Linek e?V. Vacek, Chem. Eng. Sci. 0.2 m <3> of a solution of sodium sulphide-0.5 H was introduced into a vessel having a height of 2.5 m and a diameter of 0.45 m and circulated through a nozzle of 0. , 02 m in diameter in the presence of .0.001 mol / liter of cobalt sulphate catalyst. With the help of a liquid jet | having- a speed? of 22.5 m / s (????? = 450 '000) and a free path length of 0.4 m, the rate of oxygen transfer from air at atmospheric pressure was 49? 2 kg 02 / m <3> .hour, measured in a method based on the oxidation of sodium sulphite (V ?. Linek and? V. Vacek, Chem. Eng. Sci.
36.? 1747-68 /l98l/). .Questo valore corrisponde ad un consumo energetico specifico di 0,18 kWh/kg 02< .ESEMPIO 2 36.? 1747-68 / l98l /). This value corresponds to a specific energy consumption of 0.18 kWh / kg 02 <.EXAMPLE 2
Venne ripetuta la procedura descritta nell'Esempio 1, ma con la differenza che si impiegarono un getto liquido con una velocit? di 34,8 m/s (NRe The procedure described in Example 1 was repeated, but with the difference that a liquid jet was used with a speed? of 34.8 m / s (NRe
= 5561000) ed un ugello di 0,016 m di diametro. Il tasso di dissolvimento deLl'ossigeno era di = 5561000) and a 0.016 m diameter nozzle. The dissolving rate of oxygen was
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HU813901A HU190785B (en) | 1981-12-22 | 1981-12-22 | Process for contacting liquids with gases |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| IT8224898A0 IT8224898A0 (en) | 1982-12-23 |
| IT8224898A1 true IT8224898A1 (en) | 1984-06-22 |
| IT1155435B IT1155435B (en) | 1987-01-28 |
Family
ID=10965981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT24898/82A IT1155435B (en) | 1981-12-22 | 1982-12-23 | PROCEDURE FOR CONTACTING LIQUIDS WITH GASES |
Country Status (14)
| Country | Link |
|---|---|
| JP (1) | JPS58150426A (en) |
| AT (1) | AT381244B (en) |
| AU (1) | AU555183B2 (en) |
| BE (1) | BE895384A (en) |
| CA (1) | CA1201873A (en) |
| CH (1) | CH657281A5 (en) |
| DE (1) | DE3247266A1 (en) |
| ES (1) | ES518485A0 (en) |
| FR (1) | FR2518419B1 (en) |
| GB (1) | GB2111844B (en) |
| HU (1) | HU190785B (en) |
| IT (1) | IT1155435B (en) |
| NL (1) | NL8204916A (en) |
| SE (1) | SE444119B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| HU205724B (en) * | 1986-11-28 | 1992-06-29 | Istvan Kenyeres | Method for incereasing the performance and dissolving degree of impact jet gas-imput |
| US5211508A (en) * | 1992-02-20 | 1993-05-18 | Kaiyo Kogyo Kabushiki Kaisha | Total water circulation system for shallow water areas |
| US6033576A (en) * | 1993-11-26 | 2000-03-07 | Hyperno Proprietary Limited | Chemical waste treatment |
| JPH1170439A (en) * | 1997-08-29 | 1999-03-16 | Mitsubishi Heavy Ind Ltd | Horizontal hobbing machine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2128311A (en) * | 1935-04-20 | 1938-08-30 | Du Pont | Method of carrying out chemical reactions |
| JPS5046564A (en) * | 1973-07-30 | 1975-04-25 | ||
| SE375704B (en) * | 1973-09-12 | 1975-04-28 | Volvo Flygmotor Ab | |
| JPS5411877A (en) * | 1977-06-30 | 1979-01-29 | Agency Of Ind Science & Technol | Gas-liquid contactor |
-
1981
- 1981-12-22 HU HU813901A patent/HU190785B/en not_active IP Right Cessation
-
1982
- 1982-12-17 BE BE1/10666A patent/BE895384A/en not_active IP Right Cessation
- 1982-12-20 AT AT0459882A patent/AT381244B/en not_active IP Right Cessation
- 1982-12-21 AU AU91819/82A patent/AU555183B2/en not_active Ceased
- 1982-12-21 FR FR8221447A patent/FR2518419B1/en not_active Expired
- 1982-12-21 CH CH7470/82A patent/CH657281A5/en not_active IP Right Cessation
- 1982-12-21 NL NL8204916A patent/NL8204916A/en not_active Application Discontinuation
- 1982-12-21 DE DE19823247266 patent/DE3247266A1/en active Granted
- 1982-12-22 CA CA000418381A patent/CA1201873A/en not_active Expired
- 1982-12-22 ES ES518485A patent/ES518485A0/en active Granted
- 1982-12-22 GB GB08236478A patent/GB2111844B/en not_active Expired
- 1982-12-22 JP JP57224113A patent/JPS58150426A/en active Granted
- 1982-12-22 SE SE8207341A patent/SE444119B/en not_active IP Right Cessation
- 1982-12-23 IT IT24898/82A patent/IT1155435B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| SE8207341D0 (en) | 1982-12-22 |
| ES8401728A1 (en) | 1984-01-01 |
| SE8207341L (en) | 1983-06-23 |
| HU190785B (en) | 1986-11-28 |
| ES518485A0 (en) | 1984-01-01 |
| NL8204916A (en) | 1983-07-18 |
| ATA459882A (en) | 1986-02-15 |
| BE895384A (en) | 1983-06-17 |
| CH657281A5 (en) | 1986-08-29 |
| CA1201873A (en) | 1986-03-18 |
| DE3247266A1 (en) | 1983-07-14 |
| FR2518419A1 (en) | 1983-06-24 |
| IT8224898A0 (en) | 1982-12-23 |
| AT381244B (en) | 1986-09-10 |
| JPS58150426A (en) | 1983-09-07 |
| DE3247266C2 (en) | 1987-06-19 |
| GB2111844B (en) | 1985-07-17 |
| GB2111844A (en) | 1983-07-13 |
| SE444119B (en) | 1986-03-24 |
| JPS632210B2 (en) | 1988-01-18 |
| AU555183B2 (en) | 1986-09-18 |
| IT1155435B (en) | 1987-01-28 |
| AU9181982A (en) | 1983-06-30 |
| FR2518419B1 (en) | 1988-02-05 |
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