EP0060486A1 - Process for producing solutions of hardly soluble substances and for substances tending to agglomerate, and apparatus for carrying out said process - Google Patents

Process for producing solutions of hardly soluble substances and for substances tending to agglomerate, and apparatus for carrying out said process Download PDF

Info

Publication number
EP0060486A1
EP0060486A1 EP82101827A EP82101827A EP0060486A1 EP 0060486 A1 EP0060486 A1 EP 0060486A1 EP 82101827 A EP82101827 A EP 82101827A EP 82101827 A EP82101827 A EP 82101827A EP 0060486 A1 EP0060486 A1 EP 0060486A1
Authority
EP
European Patent Office
Prior art keywords
solvent
solid
mixing device
gas
container
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.)
Withdrawn
Application number
EP82101827A
Other languages
German (de)
French (fr)
Inventor
Rudolf Dipl.-Ing. Bellemann
Bêla Dobrocsi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BWT Wassertechnik GmbH
Original Assignee
Joh A Benckiser Wassertechnik GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Joh A Benckiser Wassertechnik GmbH filed Critical Joh A Benckiser Wassertechnik GmbH
Publication of EP0060486A1 publication Critical patent/EP0060486A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/71805—Feed mechanisms characterised by the means for feeding the components to the mixer using valves, gates, orifices or openings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F21/00—Dissolving
    • 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
    • B01F23/50—Mixing liquids with solids
    • 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
    • B01F33/40—Mixers using gas or liquid agitation, e.g. with air supply tubes
    • B01F33/405—Mixers using gas or liquid agitation, e.g. with air supply tubes in receptacles having guiding conduits therein, e.g. for feeding the gas to the bottom of the receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/712—Feed mechanisms for feeding fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/714—Feed mechanisms for feeding predetermined amounts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/7173—Feed mechanisms characterised by the means for feeding the components to the mixer using gravity, e.g. from a hopper
    • B01F35/71731—Feed mechanisms characterised by the means for feeding the components to the mixer using gravity, e.g. from a hopper using a hopper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/7179—Feed mechanisms characterised by the means for feeding the components to the mixer using sprayers, nozzles or jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms

Definitions

  • the invention relates to a process for the preparation of solutions of sparingly soluble and / or substances which tend to clump by introducing the solid into a vigorously agitated solvent.
  • the object of the invention is to improve the distribution and movement of the solid particles in the solvent and to keep them suspended for a longer time, so that the dissolving process is prolonged and there is intensive contact with the solvent.
  • the solid is expediently introduced after a predetermined minimum amount of the water-gas mixture has been produced.
  • the gas-solvent mixture is introduced into the area of a solvent container near the bottom at high flow rate.
  • the gas be introduced into the solvent by the kinetic energy of the solvent or at a higher than the hydrostatic pressure.
  • the invention also relates to a mixing device for carrying out the method. This is characterized in that it is designed in the manner of an ejector with a downstream input station for the solid.
  • the mixing device is preferably arranged in the region of the bottom of a solution container.
  • the input station for the solid can be arranged in the upper area of the solution container.
  • Such an input station can have a filling funnel, the outlet opening of which is divided by webs, which are preferably roof-shaped, the inclination of their surfaces corresponding to the inner surface of the funnel.
  • the mixing device has a plurality of ejectors which are arranged in parallel or radially.
  • the ejectors are expedient with a common solvent line and this with a jacket tube Distance surrounding concentric gas line connected.
  • the gas line is arranged in the solution container and has in its upper region a closable opening which communicates with the interior of the container.
  • the container can be connected to the atmosphere.
  • the solvent line be connected to the solution tank via a lockable branch line and a pump.
  • solubility rate of solids can be increased by adding fine gas bubbles to the vigorously agitated solvent.
  • a pipeline there is an axial and a radial movement component, through which a solid particle is not only moved, but also in the resulting solution.
  • Flotation-like conditions occur in a solution container, with the difference that the formation of foam is expediently limited so that the ascending gas bubbles transporting the solid particles burst on the surface, after which the particles sink again until they are carried to the surface again by new gas bubbles.
  • the mixing device which is designed in the manner of an ejector with a downstream input station for the solid, can be connected upstream of the storage vessel for the finished solution or can be arranged in the latter.
  • an ejector in which there is an inlet for the gas to be mixed in front of the solvent nozzle, which is carried along by the solvent stream into an enlarged, preferably cylindrical channel, into or behind which the solid component is introduced.
  • the solution container 1 shown in Fig. 1 is used to produce a supply of concentrated polyphosphate solution for the treatment of the drinking and process water of a building.
  • the cylindrical container 1 is about a solution middle line 2 and a shut-off valve 3 connected to a water line 4.
  • the line 2 is guided in a vertical, central casing tube 5 concentrically into the bottom region of the container 1.
  • the line 2 is connected to a nozzle head 6 and the jacket tube 5 to an outlet head 7, the radial nozzles 9 starting from the central bore 8 of the nozzle head 6 with the cylindrical bores 10 of the outlet head 7 opposite their mouths forming an ejector ring form.
  • the nozzle head 6 In the area of the nozzles 9, the nozzle head 6 has a smaller diameter than the inside diameter of the tube 5, so that an annular space 11 is present between the outlet of the nozzles 9 and the inlet of the bores 10.
  • the nozzle head 6 is firmly connected to the outlet head 7 on its underside.
  • the casing tube 5 is fixedly connected at its upper end to the cover wall 12 of the container 1 and has an opening 13 which can be closed in this area.
  • the filling station for the solid consists of an opening in the top wall 12 of the container 1, into which the filling funnel 14 can be inserted.
  • the exit opening 15 of the funnel 14 is divided by intersecting webs 16 so that partial openings 17 are formed therein, the webs 16 being roof-like and the inclination of their surfaces 18 corresponding to the inclination of the inner surface 19 of the funnel 14.
  • the mixing device works as follows. After opening the valve 3, water flows via the line 2 into the container 1. Here, the water jets emerging from the nozzles 9 suck in air from the annular space 11, which is distributed in fine water bubbles in the water jet and exits through the bores 10 in the container 1 .
  • the phosphate input can already be started be, however, it is advantageous to wait until the water level is slightly raised and is approximately above the height of the holes 10. Since the solids run out of the hopper 14 in a relatively short time and the transport effect of the air bubbles is lower when the water level is low, and on the other hand the turbulence of the water does not cause a sufficient dissolution rate, the risk of slight lump formation cannot be completely ruled out if the water level is too low. On the other hand, the time required to fill the container with water is considerably longer than the input time of the phosphates, so that there is no reason to rush the phosphate inputs. In practice, all the necessary operations can be carried out in succession by a single operator.
  • the webs 16 installed in the outlet opening 15 of the filling funnel 14 have proven to be sufficient to ensure a sufficiently delayed, even entry of the phosphate in a finely divided stream.
  • the hopper does not need to be added, the entire Phos p hatmenge to accommodate, it can be filled in portions.
  • the phosphate particles After the phosphate has been added, it takes a long time until the rest of the water required has run in. During this time, the phosphate particles are carried further from the air bubbles to the surface, where the bubbles burst, the undissolved phosphate particles sink again until they meet another air bubble, from which they are carried up again. Since the phosphate particles come into contact with new parts of the resulting solution, their dissolution is accelerated significantly.
  • the funnel 14 can be removed and the opening and valve 3 can be closed.
  • the pipe 5 fills with solution and the pipe 2 can be connected to a metering device and acts as a suction pipe through which the solution can be removed and added to the water in the water pipe 4 (not shown).
  • a separate suction tube can also be inserted, for example, through the opening for the funnel 14.
  • the container 1 can be an integral part of a metering device or can be arranged so that the solution can be removed through an outlet in the bottom.
  • the ejectors can be arranged in the bottom of the container or in parallel in the region near the bottom of, for example, a square container, which can also have an inclined bottom.
  • the solution can be removed from the container and returned to the tube 2 in the circuit.
  • a corresponding branch line and pump would be required for this.
  • the air is removed from the container, a part escaping through the funnel opening as the water level rises.
  • a pressure increase can be achieved if the filling station is designed as a pressure lock.
  • an increase in pressure may e.g. be useful for chemicals that tend to foam too much.
  • the lock is advantageous for other reasons, the normal pressure in the container can be maintained by arranging a connection with the atmosphere.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Accessories For Mixers (AREA)

Abstract

In a process for producing solutions of hardly soluble substances and/or substances tending to agglomerate, by introducing the solid into a vigorously agitated solvent, and in an apparatus for carrying out the process, fine gas bubbles are added to the solvent at least during the addition of the solid. This is effected by means of a mixing device which is designed in the manner of an ejector with a downstream addition station for the solid and is located in the region close to the bottom of a dissolving tank. The addition station for the solid is located in the upper region of the dissolving tank and has a charging hopper (14) whose outlet orifice (15) is divided by webs (16). After the valve (3) has been opened, water flows via the line (2) into the tank (1). The water jets issuing from the nozzles (9) draw in air from the annular space (11), which air, dispersed to fine bubbles in the water jet, emerges with the jet through the bores (10) in the tank (1). The webs (16) of the charging hopper (14) ensure that the solid runs in uniformly in a finely dispersed stream. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von Lösungen schwerlöslicher und/oder zum Verklumpen neigender Stoffe durch Einbringen des Feststoffes in ein heftig bewegtes Lösungsmittel.The invention relates to a process for the preparation of solutions of sparingly soluble and / or substances which tend to clump by introducing the solid into a vigorously agitated solvent.

Es ist bekannt, Feststoffe in den Lösungsmittelstrom in einer Rohrleitung gleichmäßig dosiert einzugeben. Es ist ferner bekannt, eine Lösung in einem Gefäß herzustellen, wobei zunächst das Lösungsmittel eingefüllt und während oder nach der Eingabe des Feststoffes gerührt wird.It is known to enter solids in the solvent stream in a pipeline in uniform doses. It is also known to prepare a solution in a vessel, the solvent first being introduced and stirring being carried out during or after the solid has been introduced.

Bei schwerlöslichen und/oder zum Verklumpen neigenden Stoffen bedarf es einer längeren Zeit, bis die Feststoffteilchen restlos gelöst und eine homogene Mischung erzielt ist. Vielfach setzt sich ein Teil des Feststoffes in Toträumen ab, in denen er nur schwer in Lösung zu bringen ist.In the case of substances which are difficult to dissolve and / or tend to clump, it takes a long time until the solid particles are completely dissolved and a homogeneous mixture is achieved. Part of the solid often settles in dead spaces in which it is difficult to dissolve.

Aufgabe der Erfindung ist es, die Verteilung und Bewegung der Feststoffteilchen im Lösungsmittel zu verbessern und länger schwebend zu halten, so daß der Lösevorgang verlängert wird und ein intensiver Kontakt mit dem Lösungsmittel vorhanden ist.The object of the invention is to improve the distribution and movement of the solid particles in the solvent and to keep them suspended for a longer time, so that the dissolving process is prolonged and there is intensive contact with the solvent.

Erfindungsgemäß wird das dadurch erreicht, daß man mindestens während der Feststoffeingabe das Lösungsmittel mit feinen Gasbläschen versetzt.According to the invention this is achieved in that the solvent is mixed with fine gas bubbles at least during the input of solids.

Zweckmäßig gibt man den Feststoff nach Herstellen einer vorgegebenen Mindestmenge des Wasser-Gas-Gemisches ein.The solid is expediently introduced after a predetermined minimum amount of the water-gas mixture has been produced.

Nach der bevorzugten Ausführungsform der Erfindung bringt man das Gas-Lösungsmittel-Gemisch unter hoher Strömungsgeschwindigkeit in den bodennahen Bereich eines Lösungsmittelbehälters ein.According to the preferred embodiment of the invention, the gas-solvent mixture is introduced into the area of a solvent container near the bottom at high flow rate.

In weiterer Ausbildung der Erfindung wird vorgeschlagen, daß man das Gas durch die kinetische Energie des Lösungsmittels oder unter einem höheren als dem hydrostatischen Druck in das Lösungsmittel einbringt.In a further embodiment of the invention it is proposed that the gas be introduced into the solvent by the kinetic energy of the solvent or at a higher than the hydrostatic pressure.

Ferner wird vorgeschlagen, daß man nach Einbringen der vorgegebenen Lösungsmittelmenge die Mischung bis zur vollständigen Lösung des Feststoffes im Kreislauf führt.It is also proposed that, after the predetermined amount of solvent has been introduced, the mixture is circulated until the solid has completely dissolved.

Die Erfindung betrifft auch eine Mischvorrichtung zur Durchführung des Verfahrens. Diese ist dadurch gekennzeichnet, daß sie nach Art eines Ejektors mit nachgeschalteter Eingabestation für den Feststoff ausgebildet ist.The invention also relates to a mixing device for carrying out the method. This is characterized in that it is designed in the manner of an ejector with a downstream input station for the solid.

Vorzugsweise ist die Mischvorrichtung im bodennahen Bereich eines Lösungsbehälters angeordnet. Hierbei kann die Eingabestation für den Feststoff im oberen Bereich des Lösungsbehälters angeordnet sein. Eine solche Eingabestation kann einen Einfülltrichter aufweisen, dessen Ausgangsöffnung durch Stege unterteilt ist, die bevorzugt dachartig ausgebildet sind, wobei die Neigung ihrer Oberflächen der der Innenfläche des Trichters entspricht.The mixing device is preferably arranged in the region of the bottom of a solution container. Here, the input station for the solid can be arranged in the upper area of the solution container. Such an input station can have a filling funnel, the outlet opening of which is divided by webs, which are preferably roof-shaped, the inclination of their surfaces corresponding to the inner surface of the funnel.

Nach einer bevorzugten Ausführungsform der Erfindung weist die Mischvorrichtung mehrere Ejektoren auf, die parallel oder radial angeordnet sind.According to a preferred embodiment of the invention, the mixing device has a plurality of ejectors which are arranged in parallel or radially.

Zweckmäßig sind die Ejektoren mit einer gemeinsamen Lösungsmittelleitung und einer diese als Mantelrohr mit Abstand umgebenden konzentrischen Gasleitung verbunden.The ejectors are expedient with a common solvent line and this with a jacket tube Distance surrounding concentric gas line connected.

Gemäß einem weiteren Vorschlag ist die Gasleitung im Lösungsbehälter angeordnet und weist in dessen oberem Bereich eine mit dem Behälterinneren kommunizierende verschließbare Öffnung auf.According to a further proposal, the gas line is arranged in the solution container and has in its upper region a closable opening which communicates with the interior of the container.

Ferner kann der Behälter mit der Atmosphäre verbunden sein.Furthermore, the container can be connected to the atmosphere.

Zur Herstellung eines Kreislaufs wird vorgeschlagen, daß die Lösungsmittelleitung über eine absperrbare Zweigleitung und eine Pumpe mit dem Lösungsbehälter verbunden ist.To produce a circuit, it is proposed that the solvent line be connected to the solution tank via a lockable branch line and a pump.

Es wurde gefunden, daß die Lösungsgeschwindigkeit von Feststoffen bedeutet erhöht werden kann, wenn man das heftig .bewegte Lösungsmittel mit feinen Gasbläschen versetzt. In einer Rohrleitung kommt so zu einer axialen eine radiale Bewegungskomponente, durch die ein Feststoffteilchen nicht nur mit, sondern auch in der entstehenden Lösung bewegt wird.It has been found that the solubility rate of solids can be increased by adding fine gas bubbles to the vigorously agitated solvent. In a pipeline there is an axial and a radial movement component, through which a solid particle is not only moved, but also in the resulting solution.

In einem Lösungsbehälter treten flotationsähnliche Verhältnisse auf mit dem Unterschied, daß zweckmäßig die Schaumbildung begrenzt wird, so daß die aufsteigenden, die Feststoffteilchen transportierenden Gasbläschen an der Oberfläche zerplatzen, wonach die Teilchen wieder absinken, bis sie von neuen Gasbläschen erneut an die Oberfläche getragen werden.Flotation-like conditions occur in a solution container, with the difference that the formation of foam is expediently limited so that the ascending gas bubbles transporting the solid particles burst on the surface, after which the particles sink again until they are carried to the surface again by new gas bubbles.

In vielen Fällen gelingt es, die Feststoffteilchen in der zum Füllen des Behälters mit der vorgegebenen Lösungsmittelmenge benötigten Zeit restlos aufzulösen. Ist das nicht der Fall, kann anschließend die Lösung im Kreislauf geführt werden, bis auch der Feststoffrest aufgelöst ist. So ist es beispielsweise möglich, eine konzentrierte Polyphosphatlösung in wenigen Minuten in einfacher Weise herzustellen, wie sie als Kalkschutz für Leitungsrohre in der Wasseraufbereitung eingesetzt wird.In many cases it is possible to completely dissolve the solid particles in the time required to fill the container with the predetermined amount of solvent. If this is not the case, the solution can then be circulated until the solid residue is also dissolved. For example, it is possible to produce a concentrated polyphosphate solution in a few minutes in a simple manner, as it is used as a limescale protection for line pipes in water treatment.

Da das Verfahren sowohl in einem strömenden, als auch in einem turbulent bewegten Medium durchgeführt werden kann, kann die nach Art eines Ejektors mit nachgeschalteter Eingabestation für den Feststoff ausgebildete Mischvorrichtung dem Vorratsgefäß für die fertige Lösung vorgeschaltet oder in diesem angeordnet sein.Since the method can be carried out both in a flowing medium and in a turbulently moving medium, the mixing device, which is designed in the manner of an ejector with a downstream input station for the solid, can be connected upstream of the storage vessel for the finished solution or can be arranged in the latter.

Es ist hier an eine Grundausbildungsform eines Ejektors gedacht, bei dem vor der Lösungsmitteldüse ein Eintritt für das zuzumischende Gas vorhanden ist, das vom Lösungsmittelstrom mitgerissen in einen erweiterten, vorzugsweise zylindrischen Kanal gelangt, in dem oder hinter dem die Feststoffkomponente eingebracht wird.Here, a basic embodiment of an ejector is envisaged, in which there is an inlet for the gas to be mixed in front of the solvent nozzle, which is carried along by the solvent stream into an enlarged, preferably cylindrical channel, into or behind which the solid component is introduced.

Ein Ausführungsbeispiel der Erfindung wird anhand der Zeichnungen näher erläutert. Es zeigt:

  • Fig. 1 einen Lösungsbehälter mit Mischvorrichtung im Schnitt,
  • Fig. 2 die Ejektorvorrichtung des Gegenstandes der Fig. 1 im Längsschnitt,
  • Fig. 3 einen Einfülltrichter im Längsschnitt,
  • Fig. 4 den Gegenstand der Fig. 3 in Draufsicht.
An embodiment of the invention is explained in more detail with reference to the drawings. It shows:
  • 1 is a solution container with mixing device in section,
  • 2 shows the ejector device of the object of FIG. 1 in longitudinal section,
  • 3 shows a filling funnel in longitudinal section,
  • Fig. 4 shows the subject of Fig. 3 in plan view.

Der in Fig. 1 dargestellteLösungsbehälter 1 dient der Herstellung eines Vorrats an konzentrierter Polyphosphatlösung zur Aufbereitung des Trink- und Brauchwassers eines Gebäudes. Der zylindrische Behälter 1 ist über eine Lösungsmittelleitung 2 und ein Absperrventil 3 an eine Wasserleitung 4 angeschlossen. Die Leitung 2 ist in einem senkrechten, zentralen Mantelrohr 5 bis in den Bodenbereich des Behälters 1 konzentrisch geführt. An ihrem unteren Ende ist die Leitung 2 mit einem Düsenkopf 6 und das Mantelrohr 5 mit einem Ausgangskopf 7 verbunden, wobei die von der zentralen Bohrung8des Düsenkopfes 6 ausgehenden, radialen Düsen 9 mit den ihren Mündungen gegenüberliegenden zylindrischen Bohrungen 10 des Ausgangskopfes 7 einen Ejektorenkranz bilden. Im Bereich der Düsen 9 hat der Düsenkopf 6 einen geringeren Durchmesser als der Innendurchmesser des Rohres 5, so daß ein Ringraum 11 zwischen dem Ausgang der Düsen 9 und dem Eingang der Bohrungen 10 vorhanden ist. An seiner Unterseite ist der Düsenkopf 6 mit dem Ausgangskopf 7 fest verbunden. Das Mantelrohr 5 ist an seinem oberen Ende mit der Deckelwand 12 des Behälters 1 fest verbunden und weist in diesem Bereich eine gegebenenfalls verschließbare öffnung 13 auf.The solution container 1 shown in Fig. 1 is used to produce a supply of concentrated polyphosphate solution for the treatment of the drinking and process water of a building. The cylindrical container 1 is about a solution middle line 2 and a shut-off valve 3 connected to a water line 4. The line 2 is guided in a vertical, central casing tube 5 concentrically into the bottom region of the container 1. At its lower end, the line 2 is connected to a nozzle head 6 and the jacket tube 5 to an outlet head 7, the radial nozzles 9 starting from the central bore 8 of the nozzle head 6 with the cylindrical bores 10 of the outlet head 7 opposite their mouths forming an ejector ring form. In the area of the nozzles 9, the nozzle head 6 has a smaller diameter than the inside diameter of the tube 5, so that an annular space 11 is present between the outlet of the nozzles 9 and the inlet of the bores 10. The nozzle head 6 is firmly connected to the outlet head 7 on its underside. The casing tube 5 is fixedly connected at its upper end to the cover wall 12 of the container 1 and has an opening 13 which can be closed in this area.

Die Einfüllstation für den Feststoff besteht aus einer öffnung in der Deckelwand 12 des Behälters 1, in die der Einfülltrichter 14 eingesetzt werden kann. Die Ausgangsöffnung 15 des Trichters 14 ist durch sich kreuzende Stege 16 unterteilt, so daß sich Teilöffnungen 17 darin bilden, wobei die Stege 16 dachartig ausgebildetsind und die Neigung ihrer Oberflächen 18 der Neigung der Innenfläche 19 des Trichters 14 entspricht.The filling station for the solid consists of an opening in the top wall 12 of the container 1, into which the filling funnel 14 can be inserted. The exit opening 15 of the funnel 14 is divided by intersecting webs 16 so that partial openings 17 are formed therein, the webs 16 being roof-like and the inclination of their surfaces 18 corresponding to the inclination of the inner surface 19 of the funnel 14.

Die Mischvorrichtung arbeitet wie folgt. Nach öffnen des Ventils 3 strömt Wasser über die Leitung 2 in den Behälter 1. Hierbei saugen die aus den Düsen 9 austretenden Wasserstrahlen aus dem Ringraum 11 Luft an, die im Wasserstrahl'zu feinen Bläschen verteilt mit diesem durch die Bohrungen 10 im Behälter 1 austritt.The mixing device works as follows. After opening the valve 3, water flows via the line 2 into the container 1. Here, the water jets emerging from the nozzles 9 suck in air from the annular space 11, which is distributed in fine water bubbles in the water jet and exits through the bores 10 in the container 1 .

Es kann bereits jetzt mit der Phosphateingabe begonnen werden, jedoch ist es vorteilhaft damit zu warten, bis der Wasserspiegel etwas angehoben ist und etwa über der Höhe der Bohrungen 10 steht. Da die Feststoffe in einer verhältnismäßig kurzen Zeit aus dem Trichter 14 auslaufen und bei geringem Wasserstand die Transportwirkung der Luftbläschen geringer ist, andererseits die Turbulenz des Wassers keine ausreichende Lösungsgeschwindigkeit bewirkt, ist bei zu niedrigem Wasserstand die Gefahr einer leichten Klumpenbildung nicht völlig auszuschließen. Andererseits ist die für das Füllen des Behälters mit Wasser erforderliche Zeit wesentlich länger, als die Eingabezeit der Phosphate, so daß keine Veranlassung besteht, die Phosphateingäbe zu übereilen. In der Praxis können alle notwendigen Handgriffe von einer einzigen Bedienungsperson bequem nacheinander ausgeführt werden.The phosphate input can already be started be, however, it is advantageous to wait until the water level is slightly raised and is approximately above the height of the holes 10. Since the solids run out of the hopper 14 in a relatively short time and the transport effect of the air bubbles is lower when the water level is low, and on the other hand the turbulence of the water does not cause a sufficient dissolution rate, the risk of slight lump formation cannot be completely ruled out if the water level is too low. On the other hand, the time required to fill the container with water is considerably longer than the input time of the phosphates, so that there is no reason to rush the phosphate inputs. In practice, all the necessary operations can be carried out in succession by a single operator.

Die in der Ausgangsöffnung 15 des Einfülltrichters 14 eingebauten Stege 16 haben sich als ausreichend erwiesen, um ein genügend verzögertes, gleichmäßiges Einlaufen des Phosphats in feinverteiltem Strom sicherzustellen. Der Trichter braucht nicht die gesamte zuzugebende Phosphatmenge aufnehmen zu können, er kann portionsweise gefüllt werden.The webs 16 installed in the outlet opening 15 of the filling funnel 14 have proven to be sufficient to ensure a sufficiently delayed, even entry of the phosphate in a finely divided stream. The hopper does not need to be added, the entire Phos p hatmenge to accommodate, it can be filled in portions.

Nach erfolgter Phosphatzugabe bedarf es noch einer längeren Zeit, bis der Rest des benötigten Wassers eingelaufen ist. Während dieser Zeit werden die Phosphatteilchen weiter von den Luftbläschen zur Oberfläche getragen, wo die Bläschen zerplatzen, die noch nicht gelösten Phosphatpartikel wieder absinken, bis sie auf ein weiteres Luftbläschen treffen, von dem sie wieder hochgetragen werden. Da hierbei die Phosphatpartikel mit immer neuen Teilen der entstehenden Lösung in Kontakt kommen, wird deren Auflösung bedeutend beschleunigt.After the phosphate has been added, it takes a long time until the rest of the water required has run in. During this time, the phosphate particles are carried further from the air bubbles to the surface, where the bubbles burst, the undissolved phosphate particles sink again until they meet another air bubble, from which they are carried up again. Since the phosphate particles come into contact with new parts of the resulting solution, their dissolution is accelerated significantly.

Ist die erforderliche Wassermenge eingelaufen, liegt in der Regel bereits eine gebrauchsfertige Lösung vor. Der Trichter 14 kann entfernt und die öffnung, sowie das Ventil 3 geschlossen werden. Nun füllt sich das Rohr 5 mit Lösung und das Rohr 2 kann an ein Dosiergerät angeschlossen werden und wirkt als Saugrohr über das die Lösung entnommen und dem Wasser in der Wasserleitung 4 zugegeben werden kann (nicht dargestellt). Selbstverständlich kann auch ein gesondertes Saugrohr z.B. durch die öffnung für den Trichter 14 eingeführt werden. Ebenso kann der Behälter 1 ein integraler Bestandteil eines Dosiergerätes sein oder so angeordnet werden, daß die Lösung durch einen Ausgang im Boden entnommen werden kann. Ebenso können die Ejektoren im Behälterboden oder parallel im bodennahen Bereich eines z.B. viereckigen Behälters, der auch einen schrägen Boden aufweisen kann, angeordnet sein.Once the required amount of water has been poured in, a ready-to-use solution is usually already available. The funnel 14 can be removed and the opening and valve 3 can be closed. Now the pipe 5 fills with solution and the pipe 2 can be connected to a metering device and acts as a suction pipe through which the solution can be removed and added to the water in the water pipe 4 (not shown). Of course, a separate suction tube can also be inserted, for example, through the opening for the funnel 14. Likewise, the container 1 can be an integral part of a metering device or can be arranged so that the solution can be removed through an outlet in the bottom. Likewise, the ejectors can be arranged in the bottom of the container or in parallel in the region near the bottom of, for example, a square container, which can also have an inclined bottom.

Zur Herstellung andersartiger Lösungen, bei der die Lösung der Feststoffe einer längeren Zeit bedarf, kann die Lösung dem Behälter entnommen und im Kreislauf dem Rohr 2 wieder zugeführt werden. Hierzu wäre eine entsprechende Zweigleitung und Pumpe erforderlich.To produce different types of solutions, in which the solids need a long time to dissolve, the solution can be removed from the container and returned to the tube 2 in the circuit. A corresponding branch line and pump would be required for this.

Bei dem gezeigten Ausführungsbeispiel wird die Luft dem Behälter entnommen, wobei ein Teil mit dem Ansteigen des Wasserspiegels durch die Trichteröffnung entweicht. Ein Druckanstieg läßt sich erreichen, wenn man die Einfüllstation als Druckschleuse ausbildet. Natürlich kann eine Erhöhung des Druckes darüber hinaus z.B. bei zu starker Schaumbildung neigenden Chemikalien zweckmäßig sein. Umgekehrt kann, wenn die Schleuse aus anderen Gründen vorteilhaft ist, der Normaldruck im Behälter durch Anordnung einer Verbindung mit der Atmosphäre aufrechterhalten werden.In the exemplary embodiment shown, the air is removed from the container, a part escaping through the funnel opening as the water level rises. A pressure increase can be achieved if the filling station is designed as a pressure lock. Of course, an increase in pressure may e.g. be useful for chemicals that tend to foam too much. Conversely, if the lock is advantageous for other reasons, the normal pressure in the container can be maintained by arranging a connection with the atmosphere.

Claims (10)

1. Verfahren zur Herstellung von Lösungen schwerlöslicher und/oder zum Verklumpen neigender Stoffe durch Einbringen des Feststoffes in ein heftig bewegtes Lösungsmittel,
dadurch gekennzeichnet , daß man mindestens während der Feststoffeingabe das Lösungsmittel mit feinen Gasbläschen versetzt.1. Process for the preparation of solutions of sparingly soluble and / or substances which tend to clump by introducing the solid into a vigorously agitated solvent
characterized in that the solvent is mixed with fine gas bubbles at least during the input of solids. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man das Gas-Lösungsmittel-Gemisch unter hoher Strömungsgeschwindigkeit in den bodennahen Bereich eines Lösungsbehälters einbringt, wobei man das Gas durch die kinetische Energie des Lösungsmittels oder unter einem höheren als dem hydrostatischen Druck in das Lösungsmittel einbringt.2. The method according to claim 1, characterized in that the gas-solvent mixture is introduced at high flow velocity into the region of the bottom of a solution container, the gas being introduced into the solvent by the kinetic energy of the solvent or at a higher than the hydrostatic pressure brings in. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß man den Feststoff nach Herstellen einer vorgegebenen Mindestmenge des Wasser-Gas-Gemisches eingibt und nach Einbringen der vorgegebenen Lösungsmittelmenge die Mischung bis zur vollständigen Lösung des Feststoffes im Kreislauf führt.3. The method according to claim 1 or 2, characterized in that one enters the solid after producing a predetermined minimum amount of the water-gas mixture and, after introducing the predetermined amount of solvent, the mixture is circulated until the solid has completely dissolved. 4. Mischvorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 3 zur Anwendung in einem Lösungsbehälter (1), dadurch gekennzeichnet, daß sie mindestens einen Ejektor mit nachgeschalteter Eingabestation für den Feststoff enthält.4. Mixing device for performing the method according to one of claims 1 to 3 for use in a solution container (1), characterized in that it contains at least one ejector with a downstream input station for the solid. 5. Mischvorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der Ejektor im bodennahen Bereich und die Eingabestation für den Feststoff im oberen Bereich des Lösungsbehälters (1) angeordnet sind.5. Mixing device according to claim 4, characterized in that the ejector in the area near the bottom and the input station for the solid matter are arranged in the upper area of the solution container (1). 6. Mischvorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Eingabestation einen Einfülltrichter (14) aufweist, dessen Ausgangsöffnung (15) durch Stege (16) unterteilt ist.6. Mixing device according to claim 5, characterized in that the input station has a hopper (14), the outlet opening (15) is divided by webs (16). 7. Mischvorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Stege (16) dachartig ausgebildet sind und die Neigung ihrer Oberflächen (18) der der Innenfläche (19) des Trichters (14) entspricht.7. Mixing device according to claim 6, characterized in that the webs (16) are roof-like and the inclination of their surfaces (18) corresponds to that of the inner surface (19) of the funnel (14). 8. Mischvorrichtung nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, daß mehrere Ejektoren parallel oder radial angeordnet sind.8. Mixing device according to one of claims 4 to 7, characterized in that a plurality of ejectors are arranged in parallel or radially. 9. Mischvorrichtung nach einem der Ansprüche 5 bis 8, dadadurch gekennzeichnet, daß die Ejektoren mit einer gemeinsamen Lösungsmittelleitung (2) und einer diese als Mantelrohr (5) mit Abstand umgebenden, konzentrischen Gasleitung verbunden sind, die eine verschließbare, mit dem oberen Behälterinnenraum'kommunizierende Öffnung (13) aufweist.9. Mixing device according to one of claims 5 to 8, characterized in that the ejectors are connected to a common solvent line (2) and a concentric gas line surrounding this as a jacket tube (5) at a distance, which have a closable, with the upper container interior ' communicating opening (13). 10. Mischvorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß der Lösungsbehälter (1) absperrbar mit der Atmosphäre und die Lösungsmittelleitung (2) über eine absperrbare Zweigleitung und eine Pumpe mit dem Lösungsbehälter (1) verbunden ist.10. Mixing device according to claim 9, characterized in that the solution container (1) can be shut off from the atmosphere and the solvent line (2) is connected via a shut-off branch line and a pump to the solution tank (1).
EP82101827A 1981-03-13 1982-03-08 Process for producing solutions of hardly soluble substances and for substances tending to agglomerate, and apparatus for carrying out said process Withdrawn EP0060486A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3109646 1981-03-13
DE19813109646 DE3109646A1 (en) 1981-03-13 1981-03-13 METHOD FOR PRODUCING SOLUTIONS AND DEVICE FOR IMPLEMENTING THE METHOD

Publications (1)

Publication Number Publication Date
EP0060486A1 true EP0060486A1 (en) 1982-09-22

Family

ID=6127137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82101827A Withdrawn EP0060486A1 (en) 1981-03-13 1982-03-08 Process for producing solutions of hardly soluble substances and for substances tending to agglomerate, and apparatus for carrying out said process

Country Status (3)

Country Link
EP (1) EP0060486A1 (en)
DE (1) DE3109646A1 (en)
ES (1) ES8301661A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8700236A (en) * 1987-01-30 1988-08-16 Willem Meeuwis Luteijn Dissolving waste of sugar confectionery prodn. in water - by agitating through injection of air in mixt. at mains water temp. to prevent invert sugar formation
FR2761278A1 (en) * 1997-04-01 1998-10-02 Bio Merieux METHOD AND DEVICE FOR SUSPENSION OF HEAVY PARTICLES OF A SOLID IN A LIQUID
DE102008037207A1 (en) 2008-08-11 2010-02-18 Evonik Röhm Gmbh Process and solid container for the preparation of an aqueous methacrylamide solution
CN112388996A (en) * 2020-09-28 2021-02-23 桑文新 Production equipment and method for preparing super-hydrophobic membrane based on calcium carbonate particle template method
CN113426364A (en) * 2021-07-08 2021-09-24 深圳市瑞锋仪器有限公司 Automatic washing powder distribution device
CN114870715A (en) * 2022-05-10 2022-08-09 安徽盛城新型材料有限公司 Positive pressure air-jet mixer for dry powder production

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE455116C (en) * 1923-10-11 1928-01-25 Paul H Mueller Dr Ing Method and device for the continuous dissolution of solid substances in liquids
DE859602C (en) * 1940-07-06 1952-12-15 Murk Boerstra Device for preparing solutions
DE2650631A1 (en) * 1976-11-05 1978-05-11 Akzo Gmbh High efficiency mixer - includes one central axial and one peripheral feed meeting at turbulence centre outside mixer itself

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE455116C (en) * 1923-10-11 1928-01-25 Paul H Mueller Dr Ing Method and device for the continuous dissolution of solid substances in liquids
DE859602C (en) * 1940-07-06 1952-12-15 Murk Boerstra Device for preparing solutions
DE2650631A1 (en) * 1976-11-05 1978-05-11 Akzo Gmbh High efficiency mixer - includes one central axial and one peripheral feed meeting at turbulence centre outside mixer itself

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8700236A (en) * 1987-01-30 1988-08-16 Willem Meeuwis Luteijn Dissolving waste of sugar confectionery prodn. in water - by agitating through injection of air in mixt. at mains water temp. to prevent invert sugar formation
FR2761278A1 (en) * 1997-04-01 1998-10-02 Bio Merieux METHOD AND DEVICE FOR SUSPENSION OF HEAVY PARTICLES OF A SOLID IN A LIQUID
WO1998043728A1 (en) * 1997-04-01 1998-10-08 Bio Merieux Process and apparatus for suspending heavy particles of a solid in a liquid
US6059441A (en) * 1997-04-01 2000-05-09 Bio Merieux Process and device for suspending heavy particles of a solid in a liquid
DE102008037207A1 (en) 2008-08-11 2010-02-18 Evonik Röhm Gmbh Process and solid container for the preparation of an aqueous methacrylamide solution
CN112388996A (en) * 2020-09-28 2021-02-23 桑文新 Production equipment and method for preparing super-hydrophobic membrane based on calcium carbonate particle template method
CN113426364A (en) * 2021-07-08 2021-09-24 深圳市瑞锋仪器有限公司 Automatic washing powder distribution device
CN114870715A (en) * 2022-05-10 2022-08-09 安徽盛城新型材料有限公司 Positive pressure air-jet mixer for dry powder production
CN114870715B (en) * 2022-05-10 2023-08-18 安徽盛城新型材料有限公司 Positive pressure air flow mixer for dry powder production

Also Published As

Publication number Publication date
ES510103A0 (en) 1983-02-01
ES8301661A1 (en) 1983-02-01
DE3109646A1 (en) 1982-10-07

Similar Documents

Publication Publication Date Title
DE2627367A1 (en) METHOD AND DEVICE FOR MIXING SOLID PARTICLES WITH A LIQUID
DE2313626C3 (en) Device for continuously dissolving a powdery substance in a liquid
DE2151206A1 (en) METHOD AND DEVICE FOR MIXING LIQUIDS
DE2835709A1 (en) METHOD AND DEVICE FOR RELEASING AIR IN WATER AND THEN RELAXING THE WATER IN FLOTATION SYSTEMS
EP0142595B1 (en) Method and apparatus for the treatment of pouring water during the pouring by enrichment with co2 and h2co3
EP0044498B1 (en) Apparatus for the gasification of liquids or suspensions
EP0060486A1 (en) Process for producing solutions of hardly soluble substances and for substances tending to agglomerate, and apparatus for carrying out said process
DE4238971A1 (en) Method and arrangement for dissolving a quantity of gas in a flowing quantity of liquid
DE60015158T2 (en) METHOD FOR EXTRACTING SOLID INGREDIENTS FROM SLUDGE
DE2054222B1 (en) Device for spraying plants
DE1153725B (en) Method for gassing or ventilating fluids, especially sewage, medical baths or the like
DE102004026477B4 (en) Mixing device for fluids
DE10223037C1 (en) Process for continuous water processing forms initial mixture of powder/granular substances with untreated water, to be dissolved and mixed and distributed evenly in structured flows through reactor
DE1940458A1 (en) Method and device for mixing gas with liquid
DE4235558C1 (en) Vertical reactor for dissolving gas in liq., and esp. oxygen@ in water - liquid and gas pass downwards through number of perforated plates at velocity chosen so that limited bubble zone is formed beneath each plate
DE19519885A1 (en) Unit for filtering fine particles and dust from air while simultaneously humidifying
DE8107237U1 (en) &#34;MIXING DEVICE FOR PRODUCING SOLUTIONS&#34;
DE1782158B2 (en) DEVICE FOR GENERATING GAS BUBBLES FOR A TRUE
EP0426143B1 (en) Process and apparatus for extracting metals from ores and deposits
DE8524206U1 (en) Device for gas injection into liquids
DE2807481A1 (en) Flotation of ore or coal slurry using injected air - already mixed with atomised flotation aids to improve flotation
DE2516330C3 (en) Reactor for the production of sodium phosphoric acid
DE1278999B (en) Device for mixing a gaseous, liquid or powdery substance or mixture of substances in a liquid
DE2450837A1 (en) METHOD AND DEVICE FOR INTRODUCING GASES INTO A MASS OF LIQUID
AT385752B (en) METHOD FOR FUMING A LIQUID, AND DEVICE FOR IMPLEMENTING THE METHOD

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR IT LI LU NL

17P Request for examination filed

Effective date: 19821026

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19840109

RIN1 Information on inventor provided before grant (corrected)

Inventor name: DOBROCSI, BELA

Inventor name: BELLEMANN, RUDOLF, DIPL.-ING.