DE1105347B - Process for achieving a certain bulk weight of powders produced in spray dryers - Google Patents
Process for achieving a certain bulk weight of powders produced in spray dryersInfo
- Publication number
- DE1105347B DE1105347B DEJ9700A DEJ0009700A DE1105347B DE 1105347 B DE1105347 B DE 1105347B DE J9700 A DEJ9700 A DE J9700A DE J0009700 A DEJ0009700 A DE J0009700A DE 1105347 B DE1105347 B DE 1105347B
- Authority
- DE
- Germany
- Prior art keywords
- achieving
- spray dryers
- bulk weight
- liquid
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
- B01D1/18—Evaporating by spraying to obtain dry solids
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Formation And Processing Of Food Products (AREA)
Description
DEUTSCHESGERMAN
Die Erfindung betrifft ein Verfahren zum Erzielen eines bestimmten Schüttgewichtes bzw. -volumens von in Zerstäubungstrocknern hergestellten Pulvern. Es soll damit erreicht werden, aus Dosierungsgründen ein Pulver wahlweise leichter oder schwerer bzw. voluminöser oder raumsparender zu machen.The invention relates to a method for achieving a specific bulk weight or volume of powders produced in spray dryers. It is to be achieved with it, for reasons of dosage To make powder either lighter or heavier or more voluminous or space-saving.
Es ist bekannt, daß in Zerstäubungstrocknern hergestellte Pulver durch mehrere Faktoren im Schüttgewicht bzw. -volumen zu beeinflussen sind; dazu gehören z. B. Konzentration, Viskosität und Temperatur der zu zerstäubenden Flüssigkeit, Temperatur, Menge und Geschwindigkeit der Trocknungsluft und der Grad der Zerstäubungsfeinheit.It is known that powders produced in spray dryers are caused by several factors in bulk density or volume are to be influenced; this includes B. Concentration, viscosity and temperature the liquid to be atomized, the temperature, the amount and speed of the drying air and the degree the fineness of atomization.
Es ist auch bekannt, das Schüttgut von in Zerstäubungstrocknern herzustellenden Pulvern dadurch zu vermindern, daß der zu zerstäubenden Flüssigkeit vor der Zerstäubung flüchtige Ammoniumsalze zugesetzt werden.It is also known to thereby remove the bulk of powders to be produced in spray dryers to reduce the fact that volatile ammonium salts are added to the liquid to be atomized prior to atomization will.
Demgegenüber besteht die Erfindung darin, daß bei dem eingangs genannten Verfahren der zu zerstäubenden Flüssigkeit vor der Zerstäubung abhängig vom gewünschten Schüttgewicht Gas zugesetzt oder entzogen wird. Dies geschieht beispielsweise dadurch, daß dem Zerstäubungstrockner ein Gerät vorgeschaltet wird, in welchem die zu zerstäubende Flüssigkeit in bekannter Weise be- oder entgast wird. So kann z. B. einem Behälter eine gasarme Flüssigkeit zufließen und durch ein Rührwerk unter Gaszugabe zu einem Flüssigkeits-Gas-Gemisch aufgerührt werden. Da die Löslichkeit der Gase verschieden hoch ist, wird das zu verwendende Gas je nach dem zu behandelnden Stoff gewählt, wobei in vielen Fällen Luft genügt.In contrast, the invention consists in the fact that in the method mentioned at the beginning of the to be atomized Liquid added or withdrawn from gas before atomization, depending on the desired bulk density will. This is done, for example, in that a device is connected upstream of the spray dryer is, in which the liquid to be atomized is loaded or degassed in a known manner. So z. B. A low-gas liquid flow into a container and through an agitator with the addition of gas to a Liquid-gas mixture can be stirred up. Since the solubility of the gases is different, this becomes The gas to be used is selected depending on the substance to be treated, air being sufficient in many cases.
Die Begasung kann auch in bekannter Weise in einem Rohrsystem stattfinden, in dem außer der Flüssigkeit in feiner Verteilung Gas eingeführt wird. In einer nachfolgenden Kreisel- oder Homogenisierpumpe kommt es dann zur innigen Vermischung von Gas und Flüssigkeit und/oder zur Lösung von Gas in Flüssigkeit. Für die Veränderung des Pulverschüttgewichtes ist sowohl das gelöste wie das ungelöste, aber feinverteilte Gas wirksam.The gassing can also take place in a known manner in a pipe system in which, in addition to the Liquid in finely divided gas is introduced. In a downstream centrifugal or homogenizing pump it then comes to the intimate mixing of gas and liquid and / or to the solution of gas in Liquid. Both the dissolved and the undissolved, but finely divided gas is effective.
Die Erhöhung des Pulverschüttgewichtes wird andererseits erfindungsgemäß dadurch erreicht, daß eine gashaltige Flüssigkeit vor Eintritt in den Zerstäubungstrockner entgast wird. So ist es beispielsweise möglich, daß eine in ein Vakuumrührgefäß eingefüllte gashaltige Flüssigkeit in bekannter Weise durch Rühren unter gleichzeitigem Evakuieren Gas abgibt. Dieses Verfahren kann gegebenenfalls kontinuierlich erfolgen. Zur Intensivierung der Entgasung kann auch in bekannter Weise Ultraschall angewendet werden.On the other hand, the increase in the bulk density of powder is achieved according to the invention in that a gas-containing liquid is degassed before entering the spray dryer. This is how it is, for example possible that a gas-containing liquid filled into a vacuum stirring vessel in a known manner gives off gas by stirring while evacuating. This process can optionally be continuous take place. Ultrasound can also be used in a known manner to intensify the degassing will.
Durch Versuche konnte z. B. festgestellt werden, daß durch Begasen einer bestimmten Flüssigkeit das Verfahren zum ErzielenExperiments could z. B. be found that by gassing a certain liquid that Method of achieving
eines bestimmten Schüttgewichtesof a certain bulk weight
von in Zerstäubungstrocknernof in spray dryers
hergestellten Pulvernmanufactured powders
Anmelder:Applicant:
Industrie-Werke KarlsruheKarlsruhe industrial works
Aktiengesellschaft,
Karlsruhe, Gartenstr. 71Corporation,
Karlsruhe, Gartenstr. 71
Dipl.-Ing. Ernst Turck, Karlsruhe,
ist als Erfinder genannt wordenDipl.-Ing. Ernst Turck, Karlsruhe,
has been named as the inventor
Schüttgewicht des Trockenpulvers auf ein Viertel des Gewichtes des Pulvers aus unbegaster Flüssigkeit herabsank. Andererseits konnte durch Entgasen eines Waschmittelbreies das Schüttgewicht des Trockenpulvers auf das Doppelte gesteigert werden.Bulk weight of the dry powder to a quarter of the weight of the powder from ungased liquid sank down. On the other hand, the bulk density of the dry powder could be reduced by degassing a detergent slurry can be doubled.
Durch das Verfahren gemäß der Erfindung hat man es also in der Hand, bei beliebigem Ausgangszustand der zu zerstäubenden Flüssigkeit, durch bestimmten bzw. gesteuerten Zusatz oder Entzug von Gas vor der Zerstäubung, das gewünschte Schüttgewicht bzw. -volumen des Pulvers zu erhalten. Dabei kann die Beeinflussung des Schüttgewichtes unter Beibehalten der sonstigen im Anfang genannten Zerstäubungstrocknerbedingungen geschehen. Die Schüttgewichts- bzw. -volumenänderung kann also durch das Verfahren gemäß der Erfindung in einem Maße erreicht werden, wie es bisher nicht möglich war.With the method according to the invention you have it in hand, whatever the initial state the liquid to be atomized, by specific or controlled addition or withdrawal of gas before the Atomization to obtain the desired bulk weight or volume of the powder. In doing so, the influencing the bulk weight while maintaining the other spray dryer conditions mentioned at the beginning happen. The bulk weight or volume change can therefore be achieved by the method can be achieved according to the invention to an extent that was previously not possible.
Erwähnt sei noch, daß die zu zerstäubenden Flüssigkeiten echte oder kolloidale Lösungen, Emulsionen oder Suspensionen kolloidaler Feinheit sein können.It should also be mentioned that the liquids to be atomized are real or colloidal solutions, emulsions or Suspensions of colloidal fineness can be.
109577/144109577/144
Claims (1)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEJ9700A DE1105347B (en) | 1955-01-22 | 1955-01-22 | Process for achieving a certain bulk weight of powders produced in spray dryers |
| CH336318D CH336318A (en) | 1955-01-22 | 1955-11-21 | Process for achieving a certain specific bulk density of powders produced in spray dryers |
| FR1140161D FR1140161A (en) | 1955-01-22 | 1956-01-12 | Process for obtaining a determined gross weight or volume of powders in spray drying apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEJ9700A DE1105347B (en) | 1955-01-22 | 1955-01-22 | Process for achieving a certain bulk weight of powders produced in spray dryers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1105347B true DE1105347B (en) | 1961-04-20 |
Family
ID=7198840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEJ9700A Pending DE1105347B (en) | 1955-01-22 | 1955-01-22 | Process for achieving a certain bulk weight of powders produced in spray dryers |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH336318A (en) |
| DE (1) | DE1105347B (en) |
| FR (1) | FR1140161A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE266562C (en) * | ||||
| DE629296C (en) * | 1931-10-12 | 1936-04-27 | Eduard Ferdinand Van Suchtelen | Device for atomizing liquids and mixtures |
| DE661361C (en) * | 1936-10-31 | 1938-06-16 | Escher Wyss Maschinenfabrik G | Device for atomizing liquids |
| DE666415C (en) * | 1935-03-29 | 1938-10-19 | I G Farbenindustrie Akt Ges | Process for the production of cotton wool-like masses from polyvinyl compounds which are practically dimensionally stable and non-sticky at normal temperatures |
| DE696674C (en) * | 1938-10-04 | 1940-09-26 | I G Farbenindustrie Akt Ges | Production of dry goods |
| DE728272C (en) * | 1939-01-17 | 1942-11-24 | Dietrich Christian Siehr | Process for the distribution of gas bubbles in solidifying liquids |
| US2540182A (en) * | 1949-05-17 | 1951-02-06 | Edgar Brothers Company | Treatment of flocculable and deflocculable material |
| DE908968C (en) * | 1951-08-13 | 1954-04-12 | Pista S A | Fumigation device for liquids |
-
1955
- 1955-01-22 DE DEJ9700A patent/DE1105347B/en active Pending
- 1955-11-21 CH CH336318D patent/CH336318A/en unknown
-
1956
- 1956-01-12 FR FR1140161D patent/FR1140161A/en not_active Expired
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE266562C (en) * | ||||
| DE629296C (en) * | 1931-10-12 | 1936-04-27 | Eduard Ferdinand Van Suchtelen | Device for atomizing liquids and mixtures |
| DE666415C (en) * | 1935-03-29 | 1938-10-19 | I G Farbenindustrie Akt Ges | Process for the production of cotton wool-like masses from polyvinyl compounds which are practically dimensionally stable and non-sticky at normal temperatures |
| DE661361C (en) * | 1936-10-31 | 1938-06-16 | Escher Wyss Maschinenfabrik G | Device for atomizing liquids |
| DE696674C (en) * | 1938-10-04 | 1940-09-26 | I G Farbenindustrie Akt Ges | Production of dry goods |
| DE728272C (en) * | 1939-01-17 | 1942-11-24 | Dietrich Christian Siehr | Process for the distribution of gas bubbles in solidifying liquids |
| US2540182A (en) * | 1949-05-17 | 1951-02-06 | Edgar Brothers Company | Treatment of flocculable and deflocculable material |
| DE908968C (en) * | 1951-08-13 | 1954-04-12 | Pista S A | Fumigation device for liquids |
Also Published As
| Publication number | Publication date |
|---|---|
| CH336318A (en) | 1959-02-15 |
| FR1140161A (en) | 1957-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE69425895T2 (en) | DEVICE AND METHOD FOR SOLVING A PARTICULATE SOLID INTO A LIQUID | |
| CH627092A5 (en) | ||
| DE3338171C3 (en) | Process for separating the constituents of emulsions and device for carrying out the process | |
| DE2646275A1 (en) | PROCESS AND DEVICE FOR CONTINUOUS GRAVITY SEPARATION OF MIXTURES OF LIQUIDS AND SOLIDS | |
| EP0669852B1 (en) | Process and device for dissolving a quantity of gas in a flowing liquid quantity | |
| GB676457A (en) | A method of producing fat products such as margarine and butter | |
| DE1105347B (en) | Process for achieving a certain bulk weight of powders produced in spray dryers | |
| DE2412715A1 (en) | METHOD AND DEVICE FOR TREATMENT OF EMULSIONS | |
| DE2552228A1 (en) | Microflotation of particles from waste water using microbubbles - using liq. under pressure and avoiding agglomeration of bubbles | |
| DE725325C (en) | Method and device for carrying out chemical and physical processes between substances in different phases | |
| CH342880A (en) | Process and apparatus for the production of gunpowder | |
| DE2704282C2 (en) | Method for homogenizing a mixture of at least two liquids | |
| DE68916547T2 (en) | DIFFUSION SPRAYER FOR AEROSOL. | |
| DE577626C (en) | Device for the treatment of liquids with volatile extractants | |
| DE370299C (en) | Process for the production of emulsions from immiscible liquids | |
| DE1256630B (en) | Mixing device | |
| CH311797A (en) | Process for carrying out exothermic chemical reactions between difficult-to-mix liquid reaction components. | |
| DE2702069A1 (en) | Powdery solids and liquids mixing - using high-pressure liquid jets in mixer tube shell | |
| CH355884A (en) | Process for removing soot from soot suspensions in water | |
| DE360928C (en) | Process for obtaining the components of emulsions from liquids | |
| DE3224961A1 (en) | Hybrid liquid gasification nozzle | |
| DE928167C (en) | Method and device for separating fine organic particles from liquid suspensions | |
| DE4330697C2 (en) | Agitator with rotationally symmetrical agitator for suspending and / or for gassing | |
| DE251458C (en) | ||
| DE861925C (en) | Process for the production of foamy masses from solutions or dispersions of natural or synthetic rubber or plastics or cellulose or their derivatives |