US2357266A - Mixing jet apparatus - Google Patents

Description

Aug. 29, 1944.,

H. O. MALCOLM 2,357,266 MIXING JET APPARATUS' Filed July 24, 1941 RN \\\Q N* q Q l/9&4@ /oc'oL/V lNvE-NTOR Patented Aug. 29, 1944 f 'fUN-ITED STATE A n Harold `O.

Soccny-Vacuum Oil Company,

Malcolm, Augusta, Kans., 'assigner'r to` y Incorporated,

New York, N. Y., a corporation of New York Application July 24, 1941, Serial No. 403,836

2 Claims'. (Cl

This invention has `to dofwith mixing jets, particularly with mixing jets wherein a reagent is mixed with an oil to be treated.

In several methods of treating oils, particularly that method set forth in U. S. Reissue Patent 20,938 to Charles O. Hoover, and known commercially as theA slurry method of copper sweetening, a slurry of solid absorptive material, such as fullers earth, for example, is admixed by induction with anoil to be treated. In the method in question, Vthe treating apparatus, as shown by Hoover, consists of a reaction tube discharging` into a conical bottomed settling chamber, in the bottom of which the solid adsorptive material impregnated with reagent is settled, and an eductor or injector, in which the motive fluid is the oil to be sweetened, which injector is attached by a'pipe to the bottom of I the settling chamber so that the settled slurry of solid adsorptive material may be withdrawn therefrom by the eductive action of the injector and which injector discharges into the reaction tube above mentioned.

Due to the necessity for securing complete reaction in a very short time, the injector-mixer must secure a very high turbulence to accomplish a complete mixing and complete reaction in the fraction of time, (a matter ofV fractional seconds), permissible for the reaction; Due to this high turbulence, combined with the somewhat abrasive nature of the solid adsorptive material very serious corrosion and erosion occurs within the injector-mixer. At the same time, the process entails the necessity of close control over the proportioning of injection iluid, (oil to be treated), and eduoted material, (solid adsorptive valve body I, comprising a discharge tube 2, an injection uid inlet tube 3, an eduction tube 4, and a mounting tube 5 upon which the gland, hand wheel, and yoke of a needle valve, not shown, may be mounted for control of the lateral position of needle 6, the Valve mounting tube 5 being isolated from the partition 'I and sleeve 8 positioned therein. The discharge tube 2, eduction tube 4 and injection tube 3 are supplied with the usual anges 9, I0, II. Within the body of the valve I between the induction tube 3 and the mixing chamber I2, and axially aligned with the needle 6 there is provided a jet block I3 having an inner conical passage I6, and the end of this blockk I3 is threaded to receive a throat nut I4, which has an inner passage formed as a continuation of passage I6 and which is so bevelled at I5 as to provide a relatively sharp edged orifice at the end of that passage. The throat nut I 4 and needle 6 cooperatively provide a needle valve and seat by which the flow of injection fluid may be controlled. The external portion of the material plus reagent), .and consequently must be so constructed that this accuracy may be maintained over a comparatively long period ofl commercial operation in the face of the above noted erosion and corrosion.

This invention has for of an eductor-mixer of the type noted capable of achieving va high degree of turbulence and at the same time capable of achieving continuous close control oiY the mixing of a light uid and a slurry of solid adsorptive material, and also capable of convenient and easy replacement of parts when worn.

'Ihe invention may be readily understood vby reference to the drawing attachedhereto, the single iigure of which shows, in section-a mixing valve constructed in accordance with this invention.

Referring now to the drawing, there is shown a its object the provision throat nut I4 is hexagonally or otherwise so lshaped as to permit the engagement of a socket wrench therewith for removal.

In the discharge tube 2, the usual Venturi throat would be inappropriate because of its tendency to quench turbulence and would also be subject to great erosion. In the present device, there is provided a cylindrical discharge throat I'l, provided at its front end, (mixing chamber end), with a sharp edge I8, .at its outboard end with a flange secured in place when flange companion, and supported in vposition by ring substantial circulation of mixed iluids into the dead space 2I.

The advantages of this follows:

9 is joined with its device are in part as The cylindrical shape of `the mixing chamber I2 cooperating with the sharp edge I8 of discharge throat I1 serve to'create a violently turbulent mixing action across a wide range of flow of injection fluid, which turbulence is maintained by the cylindrical form of the discharge throat I1. This high turbulence of uid containing a solid adsorptive material creates highly erosive conditions, the cutting action being -concentrated in the areas defined by the mixing chamber side of throat nut I4 and the interior of discharge throat I1. Dueto the form of construction here adopted, only may be made of materials highly resistant injection tube 3 by I9 by which it may be,

a centrally alignedV 210, which .also serves to prevent both of these parts not to such action, as highly hardened steels, but

they may also be very quickly and easily re-v placed.

Iclaim:

1. An eductor-mixing device comprising an injection tube, a hollow cylindrical body of substantially uniform internal cross-section throughout its length connected thereto, said body having a radial eduction port therein, a

needle valve, a seat for said needle Valve disposed 10 'concentrically in said body with its discharge l end substantially centrally underlying said educ` tion port, a cylindrical discharge tube of substanf` tially lesser external diameter than the internal diameter of said body, and an annular ilange l5Y Vseat is replaceable and is internally formed to provide a passage of rapid taper, of not less than about 40 included angle, and terminates in a. plane normal to the plane o'f said port, intersecting the latter substantially diametrically.

HAROLD O. MALCOLM.

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