NO122970B

NO122970B -

Info

Publication number: NO122970B
Application number: NO0689/68A
Authority: NO
Inventors: K Bergstedt
Original assignee: Sunds Ab
Priority date: 1967-02-27
Filing date: 1968-02-26
Publication date: 1971-09-13
Also published as: FI50067B; SE348379B; FI50067C; DE1632417B2; GB1212596A; US3606272A; DE1632417A1; US3503591A; FR1565516A

Description

Blandingsanordning. Mixing device.

Foreliggende oppfinnelse angår en anordning for behandling av materialsuspensjoner, omfattende blanding av suspensjonene under samtidig innblanding av ytterligere materi- The present invention relates to a device for treating material suspensions, comprising mixing the suspensions while simultaneously mixing in further material

ale, hvilken anordning omfatter en beholder med tilløp for inn- ale, which device comprises a container with inlet for in-

føring av materialsuspensjonen i beholderen og med utløp for ut- guiding the material suspension into the container and with an outlet for

tak av behandlet materiale fra beholderen, og hvor der i be- of treated material from the container, and where in

holderen er anordnet et hylseformet legeme som har inn- og ut- the holder is arranged in a sleeve-shaped body which has inlet and outlet

løp som kommuniserer med beholderens indre. race that communicates with the interior of the container.

Oppfinnelsen tar sikte på å skaffe en blandings- The invention aims to provide a mixed

anordning av denne type som krever mindre plass og er billigere å fremstille enn den kjente, samtidig som strømningsforholdene og de blandingstekniske egenskaper ved anordningen er særdeles a device of this type that requires less space and is cheaper to produce than the known one, at the same time that the flow conditions and the mixing technical properties of the device are particularly

gode. good.

Det karakteristiske for anordningen ifølge oppfinnelsen fremgår av patentkravene og vil også fremgå av den etterfølgende detaljerte beskrivelse av de to utførelsesformer under henvisning til de tilhørende skjematiske tegninger. Figur 1 viser et lengdesnitt gjennom en blandingsanordning ifølge en første utførelsesform, mens figur 2 viser et enderiss av samme anordning sett fra den side ved hvilken materialet som skal behandles, tilføres til anordningen. Figur 3 viser i større målestokk et snitt etter linjen III-II1 på figur 1, og figur 4 et lignende snitt gjennom den fremre ende av en anordning for tilførsel av kjemikalier til behandlings-godset. Figur 5 viser et enderiss av anordningen ifølge figur 4, og figur 6 viser sluttelig et lengdesnitt gjennom den modifi-serte del av anordningen ifølge den annen utførelsesform. The characteristic of the device according to the invention appears from the patent claims and will also appear from the subsequent detailed description of the two embodiments with reference to the associated schematic drawings. Figure 1 shows a longitudinal section through a mixing device according to a first embodiment, while Figure 2 shows an end view of the same device seen from the side at which the material to be processed is supplied to the device. Figure 3 shows on a larger scale a section along the line III-II1 in Figure 1, and Figure 4 a similar section through the front end of a device for supplying chemicals to the treatment goods. Figure 5 shows an end view of the device according to Figure 4, and Figure 6 finally shows a longitudinal section through the modified part of the device according to the second embodiment.

på tegningen betegner 1 en lukket eller tilnærmet lukket beholder med deri innebygget pumpeanordning i form av et aksialpumpehjul 2. Pumpens innsugningskanal består av et i beholderen beliggende ringformet rom eller spalte 3, som hensiktsmessig har like stor åpning langs hele sin utstrekning i øyemed at innsugningen skal skje helt symmetrisk. Pumpens utløp er utformet som et rør eller 'et hylselignende hylster 4, som omgir pumpehjulet 2. Røret 4 er hensiktsmessig plassert sentralt i beholderen 1 med sin akse fallende sammen med pumpehjulets og/ eller beholderens akse, samt er videre utført med en innsnevret utløpsmunning i øyemed at den gjennom røret pumpede materia1-stråles hastighet skal akselereres i retning mot den nevnte munning. Foran rørets4 utløpsmunning er anordnet en flate med sirkulær omkrets, mot hvilken flate den fra røret uttredende stråle rettes. Vedkommende flate, som kan bestå av en sirkel-formet eller ringformet flate 5, er hensiktsmessig festet til beholderveggen, og rørets 4 lengde avpasses, slik at avstanden mellom rørets munning og platen 5 utgjør fra 0,2 - 2 f.eks. in the drawing, 1 denotes a closed or nearly closed container with a built-in pump device in the form of an axial impeller 2. The pump's suction channel consists of an annular space or slot 3 located in the container, which appropriately has an equally large opening along its entire extent in order for the suction to happening completely symmetrically. The pump's outlet is designed as a tube or a sleeve-like sleeve 4, which surrounds the pump impeller 2. The tube 4 is conveniently located centrally in the container 1 with its axis coinciding with the axis of the pump impeller and/or the container, and is also designed with a narrowed outlet opening in with the aim that the speed of the materia1 jet pumped through the tube should be accelerated in the direction towards the aforementioned mouth. A surface with a circular circumference is arranged in front of the pipe's 4 outlet, towards which surface the beam emerging from the pipe is directed. The relevant surface, which can consist of a circle-shaped or annular surface 5, is appropriately attached to the container wall, and the length of the pipe 4 is adjusted, so that the distance between the mouth of the pipe and the plate 5 is from 0.2 - 2 e.g.

0,5 - 1,5, og hensiktsmessig ca. l,o ganger rørmunningens diameter. Flaten 5 kan videre dannes av selve beholderveggen. Pumpehjulet 2 bæres av en aksel 6, som hviler i de i et lager- 0.5 - 1.5, and suitably approx. l.o times the diameter of the pipe mouth. The surface 5 can also be formed by the container wall itself. The impeller 2 is carried by a shaft 6, which rests in those in a bearing

hus 7 monterte lågere 8. Lagerhuset 7 bæres på sin side av en konsol 9, som over en flens 10 er fastskrudd til beholderens 1 housing 7 mounted bearings 8. The bearing housing 7 is supported on its side by a console 9, which is screwed over a flange 10 to the container's 1

ene endeflens. Flensen 10 er ved hjelp av føringsskinner 11 one end flange. The flange 10 is by means of guide rails 11

fast forbundet med røret 4, som omgir pumpehjulet 2, og tjener følgelig som bæreflens for det nevnte rør. For å tilveiebringe tetning mellom pumpeakselen 6 og konsolens 9 endevegg, er det anordnet en pakkboks 12 av konvensjonell type. Pumpehjulet (propelleren) 2 er innrettet til å drives ved hjelp av en ikke vist drivanordning som kan tilkobles til akselens 6 med kile- firmly connected to the pipe 4, which surrounds the impeller 2, and consequently serves as a support flange for the said pipe. In order to provide a seal between the pump shaft 6 and the end wall of the console 9, a packing box 12 of a conventional type is arranged. The impeller (propeller) 2 is designed to be driven by means of a drive device not shown which can be connected to the shaft 6 with wedge

spor forsynte fri ende 16. Beholderen 1 kan hensiktsmessig være forsynt med f.eks. to bærekonsoler 17 og en rengjøringsstuss 18. track provided free end 16. The container 1 can suitably be provided with e.g. two support brackets 17 and a cleaning nozzle 18.

For tilførsel av kjemikalier e.l. i forbindelse med behandlingen i beholderen 1, er blanderen forsynt med én sær- For the supply of chemicals etc. in connection with the treatment in container 1, the mixer is equipped with one special

skilt anordning. En slik anordning omfatter i det vesentligste et rør 19, som går gjennom beholderveggen og platen 5, som er anordnet overfor røret 4, og hvilket rør 19 med sin i beholderen 1 beliggende ende munner ut i røret 4. For å lette strømningen når materialstrømmen i røret 4 møter kjemikaliestrømmen fra røret 19, er det i det sistnevnte anordnet en konisk ledevegg 20, fig. 4, slik at utstrømningen av kjemikalier fra et rør 19 separate device. Such a device essentially comprises a pipe 19, which passes through the container wall and the plate 5, which is arranged opposite the pipe 4, and which pipe 19, with its end located in the container 1, opens into the pipe 4. To facilitate the flow, the material flow in pipe 4 meets the chemical flow from pipe 19, a conical guide wall 20 is arranged in the latter, fig. 4, so that the outflow of chemicals from a pipe 19

bringes til å finne sted gjennom en periferisk spalte 21. Også den av den av pumpehjulet 2 fremdrevne materialstrøm bør støte på en strømningsteknisk hensiktsmessig utformet ledeflate. I dette øyemed er det hensiktsmessig å avslutte rørets 19 mot pumpe- is made to take place through a circumferential gap 21. The flow of material propelled by the impeller 2 should also encounter a guide surface suitably designed for flow engineering. For this purpose, it is appropriate to terminate the pipe 19 towards the pump

hjulet vendende ende med en konisk del 22, som sammen med lede- end facing the wheel with a conical part 22, which together with guide-

veggen 20 bæres av på røret 19 festede platestål 23. the wall 20 is supported by sheet steel 23 attached to the pipe 19.

Blandingsanordningen ifølge oppfinnelsen er i første The mixing device according to the invention is in the first

rekke bestemt til å drives kontinuerlig, hvorunder ubehandlet material tilføres beholderen 1 gjennom et rør 13 og tas ut fra dette gjennom et rør 14. Tilførselsrøret 13 er plassert i beholderens endevegg nær pumpeanordningens innsugningskanal 3. Mellom rørets 13 innløp og den nevnte innsugningskanal befinner series intended to be operated continuously, during which raw material is supplied to the container 1 through a pipe 13 and taken out from this through a pipe 14. The supply pipe 13 is located in the end wall of the container near the suction channel 3 of the pump device. Between the inlet of the pipe 13 and the mentioned suction channel is

der seg en kanal 15, innrettet til dels å lede det innkommende materiale direkte inn i pumpeanordningen, og dels til å for- there is a channel 15, arranged partly to lead the incoming material directly into the pump device, and partly to

hindre at noe av materialet strømmer direkte til utløpsrøret 14. prevent some of the material from flowing directly to the outlet pipe 14.

Rørene 13 og 14 er anordnet i samme radiale plan, hvorved strøm- The tubes 13 and 14 are arranged in the same radial plane, whereby current

ningen gjennom et mot beholderens 1 akse vinkelrett plan blir helt symmetrisk. ning through a plane perpendicular to the container's 1 axis becomes completely symmetrical.

Anordningen virker på følgende måte: Det gjennom The device works in the following way: It through

røret 13 tilførte materiale blandes først i pumpeanordningen med det i beholderen 1 ved pumpeanordningens virkning i over-ensstemmelse med pilene a-b-c-d sirkulerende materiale. Ved the material supplied to the pipe 13 is first mixed in the pump device with the material circulating in the container 1 by the action of the pump device in accordance with the arrows a-b-c-d. By

rørets 4 munning eller i avstand fra pumpehjulet (propelleren) the mouth of the pipe 4 or at a distance from the impeller (propeller)

2 tilsettes kjemikaliene, og ved den nevnte munning frembringes som følge av materialstrålens hastighet og dennes avbøyning mot platen 5 en kraftig turbulens som tilveiebringer en effektiv blanding av materialet og kjemikalier med hverandre. Ved strålens avbøyning mot platen 5, skjer likeledes en innsugning av omgivende materiale, og det oppnås en sirkulasjon, slik som antydet med pilen d. Pumpehjulets(propellerens) 2 kapasitet bør være avpasset slik at den utgjør fra 1-10 ganger, hensikts- 2, the chemicals are added, and at the aforementioned mouth, as a result of the speed of the material jet and its deflection towards the plate 5, a strong turbulence is produced which provides an efficient mixing of the material and chemicals with each other. When the jet is deflected towards the plate 5, a suction of surrounding material also takes place, and a circulation is achieved, as indicated by the arrow d. The capacity of the impeller (propeller) 2 should be adjusted so that it is from 1-10 times, appropriate

messig 3-7 ganger og fortrinnsvis 4-6 ganger den gjennom rørene 13 og 14 strømmende materialmengde. Det i beholderen innkomne materiale får derved sirkulere et stort antall ganger innen det forlater beholderen gjennom røret 14. typically 3-7 times and preferably 4-6 times the amount of material flowing through the pipes 13 and 14. The material entering the container is thereby allowed to circulate a large number of times before it leaves the container through the pipe 14.

Den på figur 5 og 6 viste alternative utførelse inne- The alternative design shown in Figures 5 and 6 contains

bærer at det til behandling bestemte materiale innføres i be- means that the material intended for treatment is introduced into the

holderen omkring munningen av rørets 4 dvs. på utsiden av røret. the holder around the mouth of the tube 4, i.e. on the outside of the tube.

I beholderens endevegg er der i avstand fra den nevnte munning In the end wall of the container, there is at a distance from the aforementioned mouth

anordnet en ringformet spalte 24, som er koaksial med røret 4. Materialet tilføres spalten gjennom stussen 25, og kjemikaliene arranged an annular gap 24, which is coaxial with the pipe 4. The material is supplied to the gap through the spigot 25, and the chemicals

gjennom røret 26. Røret 26 strekker seg et stykke inn i røret 4 og er forsynt med utløpsåpninger 27. Den innenfor spalten through the pipe 26. The pipe 26 extends some distance into the pipe 4 and is provided with outlet openings 27. The inside the gap

24 beliggende del 28 har samme funksjon som platen 5 ved den på 24 located part 28 has the same function as the plate 5 next to it

fig. 1 viste utførelsesform. Strømningen i beholderen finner sted omtrent som antydet med pilene e-f-g. fig. 1 shown embodiment. The flow in the container takes place approximately as indicated by the arrows e-f-g.

Som allerede nevntT har apparatet ifølge oppfinnelsen særdeles gode strømnings- og blandeegenskaper. Dette skyldes i første rekke at materialet som innpumpes i beholderen, under sirkulasjonen i denne helt eller delvis føres tilbake til pumpeanordningen. As already mentioned, the device according to the invention has particularly good flow and mixing properties. This is primarily due to the fact that the material that is pumped into the container is completely or partially returned to the pumping device during its circulation.

Claims

1. Device for treating material suspensions comprising mixing the suspensions while simultaneously mixing in additional material, which device comprises a be-

holder (1) with inlet (13 or 25) for introducing material suspension into the container, and with outlet (14) for extracting treated material from the container, and where in the container (1) a sleeve-shaped body (4 ) which has an inlet and outlet that communicates with the interior of the container, characterized in that the outlet for the sleeve-shaped body (4) is at a distance from a flat or nearly flat surface (5 or 28), which forms a right or approximately right angle with the longitudinal axis of the sleeve-shaped body (4), and in that a rotatable pump member (2) is arranged in the sleeve-shaped body (4) for propelling the material suspension through the body and towards the flat or approximately flat surface (5 resp. 28), under which the cross-sectional area of the outlet is smaller than the cross-sectional area of the impeller, and the diameter of the sleeve-shaped body (4) after the pump member (2), calculated in the direction of flow of the material, does not amount to more than half of the container's extension in the direction of the said diameter, and that a pipe (19 or 26) is further arranged for the supply of the said additional material to the container, which pipe (19 or 26) opens into the material suspension where this is pumped from the inlet of the sleeve-shaped body (4) to the plate-like surface (5 or 28), which is arranged for even distribution of the further added material in the material suspension, and that the container is completely closed so that it can be kept completely filled with the material suspension to be treated.

2. Device as stated in claim 1, characterized in that the pipe (19 or 26) for supplying additional material extends coaxially or approximately coaxially into the outlet end of the sleeve-shaped body (4).

3. Device as specified in claim 1 or 2, characterized in that the outlet end of the pipe (19) for the supply of additional material is provided with surfaces (20) which extend at an angle with the longitudinal axis of the pipe, which surfaces form a conical surface with the tip of the conical surface facing the direction of flow of the said additional material for dispensing the material at the same time as its flow is directed through one or more openings (21) situated at the periphery of the pipe.

4. Device as stated in any one of the preceding claims, characterized in that said supply pipe (19) is provided with at least one surface (22) which forms a cone surface at the end of the pipe facing the direction of flow of the material through the sleeve-shaped the body (4) with the tip of the cone surface (22) facing the aforementioned direction of flow.

5. Device as stated in any one of the preceding claims, characterized in that the sleeve-shaped body (4) extends from a zone at one wall of the container to a zone at the opposite wall of the container.

6. Device as stated in any one of the preceding claims, characterized in that the sleeve-shaped body (4) consists of a tube, the outlet opening of which opens at a distance from the plate-like surface (5 or 28) which is up to 0.2-2 times, suitably 0.5 - 1.5 times the diameter of the outlet opening and suitably at approximately the same distance as the size of said diameter.

7. Device as specified in any of the preceding claims, characterized in that the capacity of the pump device is up to 4-6 times the capacity of the inlet section for supplying material to the container.

8. Device as stated in any one of the preceding claims, characterized in that for the supply of untreated material to the inlet space (3) for the pump device (2) in the container (1) a channel (15) is arranged, which is delimited from the other part of the interior of the container, to which channel the inlet (13) for the material is connected, and for the removal of treated material an outlet (14) is arranged which is located close to the said inlet.

9. Device as stated in any one of the preceding claims, characterized in that for the introduction of the material suspension into the container (1) an annular inlet opening (24) is arranged, which lies coaxially with the sleeve-shaped body (4), and whose diameter is larger than the diameter of the outlet opening of the sleeve-shaped body (4).

10. Device as specified in claim 2 or 9, characterized in that the pipe (19 or 26) for the supply of additional material extends centrally through the flat or nearly flat surface (5 or 28) below which the free end of the pipe lies closer the outlet end of the sleeve-shaped body than the inlet end.