US1994239A - Liquid dispersing device - Google Patents

Description

March 12, 1935. H. A. BEEKHUIS LIQUID DISPERSING DEVICE Filed May 2, 1931 1i Y 7 7 w/m .5. Z 6 6 .l i r B 7. 3 M '1 m H l. :1 a F 8 y m E l r F Patented Mar. 12, 1935 osrlce 1 H v 1,994,239 4 a 7 H v fi rouinimsrnnsmo DEVICE Herman Albert Beekhuis, Syracuse, N. Y .',"as-

signor to Atmospheric Nitrogen Corporation, New York; N. Y., .a, corporationof New'York T A pplication, May 2', 1931, Serial No. "534,634

Claims. (Cl. 299 63)' V 1 uThis; invention relates to an apparatus for, the

dispersion of liquid materials. More-particularly, this invention relates-toan apparatusfor dispersing molten materials into a cooling Igasin the form 5 of substantially'uniform droplets.

[It is desirable toflproduce ,many materials in the form ,of separatejgranuleswhich areobtainable by, dispersing a melt, of the same into a cooling gas. For example, it has heretoiorebeen proposed to thus-treat fused caustic-alkalies and fertilizer salts suchas urea, ammonium nitrate, etc. It-is desirable that the liquid material be dispersed in substantially uniform particles so that the product obtained will consist of granulesof uniform size, The difficulties' in producing a highly satisfactory product are enhanced when large quantities of the fused material are to be rapidly, handled on a commercialscale;

It is an object of this invention to'provide .a dispersing device capable of rapidly handlinglarge quantities of fluid material .and dispersing it in substantially uniform droplets. ,Other ob: jects of the invention will in part be obvious and will in part appear. hereinafter. 3

The invention comprisesa-a chamber having vertically disposed side walls arrangedforrotation in a horizontal plane about ayertical axis which passes throughthe center of the chamber, the side walls being pierced by, a plurality of ,elongated narrow slots. The invention also comprises a multiple disc fluid dispersing. device arranged for rotating about thecenteraxis of theudiscs. The inventionfurther comprises a fluid dispersing device comprising a plurality of discs forming a centrally located chamber 7 and-restricted feed channels leading from-the central chamber to the surfaces of the discs. Theinvention accordingly comprises the-features; of construction, combinations of elements, and arrangement of parts, which will ,be exemplified in; the construction hereinafter-set forth and the scope of the invention will be indicatedin the claims. 1

For a fuller understandingof the nature and objects of'theinvention reference shouldbe had to the followingdetailed descriptionrtakenin connection with the accompanying drawing, in which: if

Fig. leis across section ofanexample of the dispersing device of this invention;

Fig. 2 is a cross section of the device shown in Fig. 1 taken along line II-II.

Referring to the drawing, a shaft 1 carries on its lower extremity a circular disc 2. A plurality of annular discs 3 having thickened portions at the center of the annuli and aretainer ring 4are carriedinsuperimposed relationship with disc 2 bYnbDltS 5 which, pass through the ring and discs, The bottom of each of discs 3 and of retainer ring 4, is spaced from the topsurface of the disc below by means. of annular spacers 6 through'which bolts 5,pa ss. By tightening down on the nuts ofbolts 5, ring 4 and plates 3 and 2 are rigidly held as a unitary structure which may be rotated about shaft 1. In the device shown in the drawing, the bottom surfaces '7 of discs 3 diverge from the top surfaceof the disc below, from the center of thedisc towards the outside. Thev central thickened portions of discs 2 and 3 and ring 5 form a central basket-like container enclosing a chamber 3. The outer portions of discs 2 and 3 constitute a series of horizontal line about the outside of chamber 8. Slots 9 formed by the inner portions of-discs 2; and 3 and the bottom ofretainer ring 4,1eadfrom chamber 8 to the surfaces of the ,outerportions oftheseveral' plates. A delivery spout lfl cofntrolled by a valve 11 serves to deliver fluid from a vassel 12 to the central chamber} of the dispersion device. Shaft 1 of the dispersion device is connected to a motor not shown in the drawing, whereby the device may be rapidly rotated about theshaft as an axis.

. employing the device shown in Figs. 1 and 2 for the ,dispersion of fusedso'dium nitrate, for

.egzample shaft land the discs and retainer ring, carried thereon are rapidly rotated. Fused sodium nitrate is-then continuously passed into chamber 8 from vessel 12 to maintain a level of .the fused material in chamber 8 above the uppermost of slots 9. Under the influence of the centrifugal force upon the fused material in chamber 8 generated by the rotation of the chamber, the fusedsodium nitrate is ejected through slots 9 to the surfaces of discs 2 and 3,

.ispassed over the surfaces of the discs and from the outermost edges thereof the molten nitrate is thrown in the form of divided droplets. The

rate of rotation. of shaft 1, the diameter of discs 2 and .3, thedistanceof slots 9 from the center of rotation of ,the device, and the Width of the since numerous modifications of this particular device may be made.

By positioning slots 9 at a relatively short distance from the center of rotation as compared with the outer edges of the discs, the desired rate of feed of the fluid material to thesurfaces of the discs is accomplished employing relatively wide slots since the centrifugal force acting upon,

the liquid to force it throughthe slots increases as the liquid moves away from the center of ro-,

tation. Thus with the slots near to the center of rotation, theforce acting upon the' liquid to eject it through a slot is relatively small and a comparatively wide slot 'maybe employed without excessive quantities of liquid passing through the slot. This is of particular advantage inthat narrow slots have a tendency to be stopped up by solid material which may be carried in the fluid passed therethrough. A further advantage is that variations in the rateof rotation of the device have a lesser influence in changing the rate of feed of'materials through the slots than when they are at a greater distance from the center of rotation.' It will thus beseen that in dispersing fluid material from the device of this invention, the material isfirst'acted upon by centrifugal force to eject it through a means for controlling the amount of" ejected liquid. The centrifugal force acting upon the ejected liquid is then increased as it moves along the surface of discs 2 and 3 and under the influence o'f'a relatively high force is throwr'i'from the discs into the atmosphere surrounding the device.*

It is, of course, evident that-the dispersion device of this invention is not limited in use to: the

dispersion of fused solids but may be employed in general for the dispersion of liquids. Since certain changes may be made in the above construction and different embodiments of the invention could be made without departing from the the plates, it is not necessary that the dispersing device of this application embody this particular feature. A dispersing device may likewise be constructed in accordance with my invention wherein the slots governing thefiow; of

liquid from the'ce'ntral chamber discharge directly to the atmosphere surrounding'the device instead of, as described above, to the surface of discs over which the liquid passes and from the edges of which it is thrown outwardly. Furthermore, while in the apparatus particularly described the superimposed discs and ring are each fixed to the next lower disc and the lowestdisc 1,994,239 v V i is fixed directly to shaft 1, the device of this invention may be constructed with the several discs and ring each separately fixed directly to the cular disc and a plurality of vertically disposed annular discs fixed to a shaft said annular discs surfaces diverging from the top surface of the disc below from the center towards the outside and being spaced from each other and from the chamber tolthe surfaces of said discs. i 2. A liquid dispersing device comprising a circular discs and a pluralityof vertically disposed having horizontal upper surfacesand bottom annular discs having thickened central portions I of the, annuli, said discs constituting the walls 20 amount to the surfaces of the discs, shamans for rotating said discs in a horizontal planej r 3. A liquid dispersing device for the'spraying" of hot melts solidifying atatmospherictemperaturescomprising a cylindrical containerl with. vertically disposed side walls arranged for ro-. 'tation in a horizontal plane about an axis.

traversingthe container anda plurality of: cir

cumferentially elongated narrow slots of a structurally fixed width piercing said'side walls, thewidth of said slots and their distance-from the axis about which said side wallsrotateflbing correlated to feed liquid from a body ofthe same 7 maintained within the container through the slots at a desired rate; V V Y I 4. A liquid dispersing device comprisinga container with vertically disposed side walls arranged for rotation .in a horizontal plane,. a plurality of horizontal fins on the outside of said container, and circumferentially elongatednarrow' 7 slots of a structurally fixed width piercing said side walls and leading from within said container 'to said fins, the outer portions of the surface width of said fins for a radial distance not substantially less than the radial length of said slots being spaced from the surfaces of-adjacent fins a distance materially greater than the distance between the walls of said slots. 5. In a liquid dispersing device for the spraying of hot melts solidifying at atmospheric tem peratures, a plurality of annular discs vertically positionedwith respect to each other, said discs being arranged for rotation about their central axis and spaced from each other to form elongated narrow slots 'of a structurally fixed width between the central portions ef-the discs,

the width of said slots and their distance from the axis about which said discs rotate beingcors' related to feed liquid from a body of the same a maintained within the central chamber formed by the annuli of said discs through the slotsat

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