DE2429393B2 - Device for the continuous dissolving of powdery solids - Google Patents
Device for the continuous dissolving of powdery solidsInfo
- Publication number
- DE2429393B2 DE2429393B2 DE2429393A DE2429393A DE2429393B2 DE 2429393 B2 DE2429393 B2 DE 2429393B2 DE 2429393 A DE2429393 A DE 2429393A DE 2429393 A DE2429393 A DE 2429393A DE 2429393 B2 DE2429393 B2 DE 2429393B2
- Authority
- DE
- Germany
- Prior art keywords
- solids
- mixing
- mixing space
- dissolving
- 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- Withdrawn
Links
- 239000007787 solid Substances 0.000 title claims description 15
- 239000007788 liquid Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 description 9
- 239000007921 spray Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 229920000867 polyelectrolyte Polymers 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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
- B01F35/71775—Feed mechanisms characterised by the means for feeding the components to the mixer using helical screws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/01—Separation of suspended solid particles from liquids by sedimentation using flocculating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F21/00—Dissolving
- B01F21/10—Dissolving using driven stirrers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F21/00—Dissolving
- B01F21/20—Dissolving using flow mixing
-
- 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
- B01F25/70—Spray-mixers, e.g. for mixing intersecting sheets of material
- B01F25/72—Spray-mixers, e.g. for mixing intersecting sheets of material with nozzles
- B01F25/721—Spray-mixers, e.g. for mixing intersecting sheets of material with nozzles for spraying a fluid on falling particles or on a liquid curtain
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/82—Combinations of dissimilar mixers
- B01F33/821—Combinations of dissimilar mixers with consecutive receptacles
- B01F33/8212—Combinations of dissimilar mixers with consecutive receptacles with moving and non-moving stirring devices
-
- 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
- B01F35/7179—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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Description
3030th
Die Erfindung betrifft eine Vorrichtung der im Oberbegriff des Anspruchs 1 angegebenen Bauart.The invention relates to a device of the type specified in the preamble of claim 1.
Bei einer bekannten Vorrichtung dieser Art (DE-OS 23 13 626) sind die Düsen in dem Mischraum auswärts gerichtet Die aus diesen Düsen austretenden Strahlen schleudern die pulverförmigen Feststoffteilchen daher auf die Außenwand des Mischraums. Dort neigen diese Teilchen dazu, zusammenzubacken und Klumpen zu bilden, die sich nur langsam auflösen.In a known device of this type (DE-OS 23 13 626) the nozzles in the mixing space are outward directed The jets emerging from these nozzles therefore hurl the powdery solid particles on the outside wall of the mixing room. There these particles tend to stick together and form lumps that are slow to dissolve.
Der Erfindung liegt die Aufgabe zugrunde, diese Klumpenbildung zu verhindern und daher ein schnelles Auflösen der Feststoffe bei kontinuierlicher Arbeitsweise der Vorrichtung zu ermöglichen.The invention is based on the object of preventing this lump formation and therefore a rapid one To enable the solids to dissolve while the device is in continuous operation.
Wie diese Aufgabe gelöst ist, ist in dem kennzeichnenden Teil des Anspruchs 1 angegeben.How this object is achieved is specified in the characterizing part of claim 1.
Der durch die Erfindung erzielte Fortschritt besteht darin, daß die Düsenstrahlen dort aufeinandertreffen, wo die Feststoffe herabfallen, und dort unter starker Turbulenz die Feststoffteilchen mit der Flüssigkeit so mischen, so daß sich diese Teilchen in kürzester Zeit lösen können. Daher eignet sich die Erfindung besonders zum Auflösen von Polyelektrolyten, die als Zusatz zu bekannten Flockungsmitteln in Form von Aluminium- Eisen- und Kalziumsalzen, verwendet werden, aber auch in der Wasseraufbereitung (Trink-, Betriebs- und Abwasser) als selbständige Flockungsmittel dienen. Solche Polyelektrolyte sind beispielsweise hydrolysierte Polyacrylamide und Copolymerisate von Acrylamid mit Acrylsäure. Da diese Stoffe hygroskopisch sind und bei Feuchtigkeitsaufnahme zum Bilden von Klumpen neigen, bedeutet es einen erheblichen Fortschritt, daß die Stoffe trotz dieser Eigenschaft bei Anwendung der Erfindung im kontinuierlichen Verfahren schnell in wäßrige Lösungen überführt werden können.The progress achieved by the invention is that the nozzle jets meet there, where the solids fall, and there under strong turbulence the solid particles with the liquid like this mix so that these particles can dissolve in a very short time. Hence the invention is useful especially for dissolving polyelectrolytes, which are used as additives to known flocculants in the form of Aluminum, iron and calcium salts, but also in water treatment (drinking, Process water and wastewater) serve as independent flocculants. Such polyelectrolytes are for example hydrolyzed polyacrylamides and copolymers of acrylamide with acrylic acid. Since these substances are hygroscopic and tend to form lumps when moisture is absorbed, it means a considerable amount Progress that the substances in spite of this property when applying the invention in the continuous process can be quickly converted into aqueous solutions.
Die Unteransprüche betreffen zweckmäßige Ausgestaltungen der Erfindung.The subclaims relate to expedient developments of the invention.
In den Zeichnungen, in denen ein bevorzugtes Ausführungsbeispiel der Erfindung veranschaulicht ist, zeigtIn the drawings, in which a preferred embodiment of the invention is illustrated, shows
F i g. 1 einen schematischen lotrechten Schnitt durch die Vorrichtung,F i g. 1 shows a schematic vertical section through the device,
F i g. 2 in größerem Maßstab einen lotrechten Schnitt durch den in F i g. 1 veranschaulichten Mischraumbehälter undF i g. 2 on a larger scale a vertical section through the in F i g. 1 illustrated mixing space container and
F i g. 3 diesen Behälter im Gründriß.F i g. 3 this container in plan.
In dem Vorratsbehälter 1 befindet sich der aufzulösende pulverförmige Feststoff, z. B. ein Flockungshilfsmittel in Form von Polyelektrolyten. Unten bildet der Behälter 1 einen waagerechten Schneckenkanal 3, in dem eine Förderschnecke 2 untergebracht ist Diese wird langsam angetrieben und fördert eine genau dosierte Menge des Feststoffes je Zeiteinheit aus einem unten im Behälter 1 vorgesehenen Auslaß. An diesem Auslaß ist eine Heizvorrichtung 4, etwa eine den Auslaßstutzen umgebende elektrische Heizwicklung, angebracht, die etwa auf 60 bis 8O0C erwärmt ist Je größer die Fördermenge bemessen ist, um so stärker muß die Heizleistung sein. Der auf diese Weise erwärmte und dadurch besonders getrocknete pulverförmige Feststoff fällt nun frei eine Strecke von 100 mm herab in das obere Ende eines Mischraumbehälters 5, dessen Bauart sich im einzelnen aus den F i g. 2 und 3 ergibt. Sein Mantel besteht aus einem oberen, sich nach oben verjüngenden kegelförmigen Teil und aus einem sich daran anschließenden unteren, sich abwärts verjüngenden Teil. Der obere Teil des Mantels hat auf seinem Umfange dicht am oberen Ende einen Kranz von Löchern, beim gezeigten Beispiel drei solcher Löcher, in die Sprühdüsen 6 eingesetzt sind. Diese Düsen sind schwach abwärts geneigt, also in dem Mischraum einwärts und leicht nach unten gerichtet. Ihnen wird das Lösungsmittel, z. B. Wasser, zugeführt Die eingesprühten Wasserstrahlen durchwirbeln die im Sprühraumbehälter befindliche Luft und treiben sie dabei abwärts, so daß diese Luft von oben angesaugt und aus dem unteren offenen Ende des Sprühraums herausgedrückt wird. Die Teilchen des in diese durchwirbelte Luft hineinfallenden pulverförmigen Feststoffes werden daher augenblicklich durchnäßt und in Flüssigkeit eingehüllt, bevor sie mit anderen Teilchen Klumpen bilden können. Insbesondere wird durch die Richtung des Strahles vermieden, daß die Teilchen etwa noch vor ihrer Umhüllung mit Flüssigkeit an die Innenwand des Sprühraumbehälters geworfen werden und etwa daran haften und Klumpen bilden.In the storage container 1 is the pulverulent solid to be dissolved, z. B. a flocculant in the form of polyelectrolytes. At the bottom, the container 1 forms a horizontal screw channel 3 in which a screw conveyor 2 is accommodated. At this outlet is a heater 4, such as an electric heating coil surrounding the outlet connection is attached, which is heated to about 60 to 8O 0 C. The greater the flow rate is measured, the more the heating power must be. The powdery solid, heated in this way and thereby particularly dried, now falls freely down a distance of 100 mm into the upper end of a mixing space container 5, the design of which can be seen in detail from FIGS. 2 and 3 results. Its mantle consists of an upper, conical part that tapers upwards and an adjoining lower part that tapers downwards. The upper part of the jacket has on its circumference close to the upper end a ring of holes, in the example shown three such holes, into which spray nozzles 6 are inserted. These nozzles are inclined slightly downwards, that is to say inwards and slightly downwards in the mixing space. You will be the solvent, z. B. Water, supplied The sprayed water jets swirl through the air in the spray chamber and drive it downwards so that this air is sucked in from above and pushed out of the lower open end of the spray chamber. The particles of the pulverulent solid falling into this whirled air are therefore instantly soaked and enveloped in liquid before they can form clumps with other particles. In particular, the direction of the jet prevents the particles from being thrown onto the inner wall of the spray chamber before they are coated with liquid, and from sticking to it and forming lumps.
Vorzugsweise ist jede Sprühdüse 6 so gestaltet, daß der aus ihr austretende Strahl die Gestalt eines schwachgewölbten Fächers hat, so daß die seitlichen Strahlen dieses Fächers steiler abwärts geneigt sind als die mittleren Strahlen. Es hat sich gezeigt, daß die Luft im Sprühraumbehälter auf diese Weise in der Behältermitte besonders stark durchwirbelt wird.Preferably, each spray nozzle 6 is designed so that the jet emerging from it has the shape of a slightly curved fan, so that the lateral rays of this fan are more steeply inclined downwards than the middle rays. It has been shown that the air in the spray chamber container in this way is in the middle of the container is swirled particularly strongly.
Der Mischraum, in dem die Feststoffe auf die schräg abwärts gerichteten Strahlen der zugefühnen Flüssigkeit treffen, ist also von Einbauten frei. Das ist deshalb von Bedeutung, weil sich erfahrungsgemäß an Einbauten im Sprühraum die pulverförmigen Feststoffe leicht absetzen und dann allmählich wachsende Strömungshindernisse bilden, die einen kontinuierlichen Betrieb stören. An den Wandungen des unteren kegelförmigen Teiles des Sprühraumbehälters werden die von allen Seiten gleichmäßig benetzten Teilchen von dem ablaufenden Wasser mitgenommen und dann in gleichmäßig angequollenem Zustand ohne Bildung vonThe mixing room, in which the solids are exposed to the obliquely downward jets of the added liquid meet, is therefore free of built-in components. This is important because experience has shown that it is built-in components In the spray room, the powdery solids settle slightly and then gradually form increasing flow obstacles that ensure continuous operation disturb. On the walls of the lower conical part of the spray chamber container, they are all Pages evenly wetted particles are carried away by the running water and then in evenly swollen state without the formation of
Klumpen in den unter dem Mischraumbehälter S befindlichen Löse- und Reifebehälter 7 gespült. Dieser
hat die Gestalt einer Durchlaufbatterie, die aus mehreren mit Überlaufrohren 9 und Rührwerken
versehenen Kammern besteht, an deren letzte sich eine Dosierpumpe 8 anschließt Diese zieht die fertige
Lösung fortlaufend ab.
Oberhalb des Mischraumbehälters 5 kann eine Blende 14 mit einer öffnung zum Durchlaß der herabfallenden
Feststoffe vorgesehen sein. Diese Blende 14 schützt den Auslaß des Behälters 1 und den darin befindlichen
Dosierförderer 2 gegen Wassernebel, die vom Mischraumbehälter 5 aufsteigen. Jedoch behindert die Blende
14 in keiner Weise den Durchlauf der Teilchen durch den Mischraumbehälter 5.Lumps are flushed into the dissolving and maturing container 7 located under the mixing chamber S. This has the shape of a continuous battery, which consists of several chambers provided with overflow pipes 9 and agitators, the last of which is connected to a metering pump 8. This continuously withdraws the finished solution.
A screen 14 with an opening for the passage of the falling solids can be provided above the mixing chamber container 5. This screen 14 protects the outlet of the container 1 and the dosing conveyor 2 located therein against water mist rising from the mixing chamber container 5. However, the screen 14 in no way hampers the passage of the particles through the mixing space container 5.
Hierzu 3 Blatt ZeichnungenFor this purpose 3 sheets of drawings
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2429393A DE2429393B2 (en) | 1974-06-19 | 1974-06-19 | Device for the continuous dissolving of powdery solids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2429393A DE2429393B2 (en) | 1974-06-19 | 1974-06-19 | Device for the continuous dissolving of powdery solids |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2429393A1 DE2429393A1 (en) | 1976-01-02 |
| DE2429393B2 true DE2429393B2 (en) | 1978-06-15 |
Family
ID=5918385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2429393A Withdrawn DE2429393B2 (en) | 1974-06-19 | 1974-06-19 | Device for the continuous dissolving of powdery solids |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2429393B2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2441413A1 (en) * | 1978-11-15 | 1980-06-13 | Hoechst France | Making aq. soln. of macromolecular organic powders esp. flocculants - by partial dissolving in agitated vessel followed by retention without agitation |
| DE3228812C2 (en) * | 1982-08-02 | 1984-11-22 | Chemische Fabrik Stockhausen GmbH, 4150 Krefeld | Process for the rapid dissolution of water-soluble polymers |
| DE3228843C2 (en) * | 1982-08-02 | 1984-11-29 | Chemische Fabrik Stockhausen GmbH, 4150 Krefeld | Process for the rapid dissolution of water-soluble polymers |
| WO1994019095A1 (en) * | 1993-02-26 | 1994-09-01 | Allied Colloids Limited | Apparatus and method for wetting powder |
| EP0799573B1 (en) * | 1996-04-01 | 2003-06-18 | Societe Des Produits Nestle S.A. | Process and apparatus for dissolving powder in a liquid |
| GB2461574A (en) * | 2008-07-05 | 2010-01-06 | Peter David Wilson | Feed apparatus for a mixing vessel |
| US10919006B2 (en) * | 2016-03-14 | 2021-02-16 | Championx Usa Inc. | Progressive tank system and method for using the same |
| WO2018076150A1 (en) * | 2016-10-25 | 2018-05-03 | 吴云萍 | High-efficiency pipe-tank flocculation device |
| CN114367206B (en) * | 2022-03-23 | 2022-05-31 | 广东禾康精细化工有限公司 | Device and method for preparing captan |
| CN115403163B (en) * | 2022-10-28 | 2023-03-24 | 杭州微科生物技术有限公司 | Automatic dosing equipment for denitrifying microorganisms |
-
1974
- 1974-06-19 DE DE2429393A patent/DE2429393B2/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE2429393A1 (en) | 1976-01-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8239 | Disposal/non-payment of the annual fee |