US1860118A - Crystal building pan - Google Patents

Description

Filed boo. 19. 1927 2 Sheets-Sheet 1 mm 2 Q2 May 24, 1932. T. RAY ET AL CRYSTAL BUILDING PAN Filed Dec. 19 1927 2 Sheets-Sheet 2 W n W W 772261 7?. Ray Wmas Fay ,d zdo 19 crystals Patented May 24, 1932 UNITED STATES PATENT OFFICE THOMAS RAY AND JOSHUA R. BAY, OF MANISTEE, MICHIGAN: I

CRYSTAL BUILDING PAN Application filed December 19, 1927. Serial 1T0. 241,054. y u I This invention pertains to the general class of devices for the purpose'of evaporating liquid and separating crystals therefrom and particularly to a device forbuilding up the 6 size of such crystals. In the use of devices in the prior art for the purpose of crystallizing substances and particularly when the formed crystals have a tendency to fall out of solution, it has been found ditlicult to form of any appreciable size. The prod- .uct generally is very fine. In many industries, particularly the salt industry, it is highly desirable to obtain crystals of relatively large volume. In the salt industry, the desirability of large crystals is well known, one of which is the saving in time in passing the salt through the centrifugals. Liquid is more easily thrown from the mass containing large 2 crystals. An object of our invention is therefore the production of an evaporator in Which the crystals may be built up to any desired size. A further object of the invention is the production of an evaporator in which the size of the crystals may be varied by a ready adjustment of parts. A further object of our invention is the productionof a device of a relatively small number of parts, of low cost. easily operated, economical in operation and of durable construction.

Many other objects and advantages of the onstruction herein shown and described will no obvious to those skilled in the art from the disclosure herein given.

To this end our invention consists in the novel construction, arrangement and combination of parts herein shown and described,

and more particularly pointed out in the claims.

In the drawings, wherein like reference characters indicate like or corresponding parts: i

Fig. 1 is a sectional elevation of an evaporator with applicants novel arrangement and combination of parts incorporated therein; Fig. 2 is a section on line 22 of Fig. 1; and V Fig. 3 is a section on line 3-3 of Fig. 1. Referring now to Fig. 1, an evaporator 1 is shown with a calandria 2 incorporated therein, the calandria 2 being preferably of by the spider 7 is an a vertical tube type and having a well at the I center. At 17 and 18 are shown means for withdrawing non-condensiblc gasesfrom the heating chambers of the calandria. evaporator has a vertical shaft t extending The I therethrough and has a circulator5 attached at the bottom of theshaft.

6 of the shaft 4 is journaled said spider 7 being supported from the bottom sides 8 of the evaporator 1. bluppoiited annular-shaped trough 9 of arcuate cross-section. The inner pcriph eral edge 10 of the annular-trough 9 in the The lower end in a spider 7,

preferred embodiment is integral with the a bearing supporting the lower end (3 of the circulator shaft 4. arcuate cross-section, then curves from all sides of the bearing (.lownwardly, outwardly and then upwardly. The outer rim 11. of the trough is adjustably spaced from the inner Wall 12 of the lower part of the evaporator 1.

The trough 9 is preferably constructed in The trough 9 being of sections, each section being annular in form as clearly disclosed in Fig. 1. Three sections 13, 14 and 15 are shown. However, trough 9 may be made up of any number of sections. Each section may also be divided into sub-sections. As shown in Fig. 3, it is readily seen that by disconnecting an outer section or sections of the annular trough 9 that the outer peripheral edge 11 of the trough 9 may be spaced any desirable distance from-the inner wall 12 of the evaporator 1.

The operation of the device is as follows: Brine or other liquid enters the by any suitable means. The circulator 5 is placed in operation which causes the liquid to be drawn downwardly through the well 3 and forced outwardly and upwardly past the outer peripheral edge 11 of the annular trough 9. The liquid then flows up through-theculandria 2 and is heated thereby. The heating of the liquid in the calandria 2 augments the circulation, the liquid passing out through the top of the calandria 2 and back down through the well As the liquid becomes saturated, small crystals are formed therein,

evaporator said crystals having a tendency to separate from the solution, particularly in non-viseous liquids. However, if said small crystals are kept circulating with the brine, said crystals will increase in size due to further deposits of the crystallizing substance thereon. By our novel arrangement and combination of parts thelcrystals the circulating brine or other'liquid and built up to any desired size within reasonable lim' its. The crystals, which are of such size as to have a tendency to drop out of the brine or liquid, when coming down through the well 3 instead of separating from the brine and dropping to the bottom of the evaporator drop into the annular trough 9. As the brine or other liquid circulates down toward the annular trough 9 and up through the-calandria 2, the brine or other liquid carries these crystals therewith, thuskeeping' same circulating with the brine. However, after the crystals have reached an appreciable size, same will have atendency to drag along the bottom of the trough 9 and will finally drop over the outer peripheral edge 11 of the annular trough 9. The size of the crystals is controlledby adding or removing outer sections'of the trough 9. The greater the diameter of the annular trough 9 the greater will be the size of the crystals. As shown in the drawings, two removable annular sections 15 and'14 are shown. However, any number of sections may be provided. Should the two outer sections 15 and 14 of the form shown -beremoved, a small crystal will be formed. -However, the size of this crystal will be larger than that ordinarily formed in an evaporator without this form of our novel crystal builder incorporated therein. It is obvious, however, that the crystal building apparatus may be made entirely removable from the pan. The size of crystals may also be regulated by removing asub-section or sub-sections of an outer annular section as will be readily apparent to persons tamiliar with our invention. The sub-sec tions as removed may be readily withdrawn from the evaporator through a manhole.

The pan shown has incorporated therein a novel dome 16 which is fully described and forms part of an invention claimed in our co-pending application Serial No. 377,798 filed July 12, 1929. Dome 16 is connected with ring pipe 20 by means of pipes 19 shown in dotted lines.

If for any reason it should be desired to circulate the brine or other liquid in the opposite direction or in other words up through the well and down through the tubes, the space at the outer peripheral edge would be closed by any convenient means such as adding another section. In this case a section as at 13 at the inner peripheral edge of the trough 9 would be made removable and the crystals would drop downward in the space may be retained in provided thereby. The operation will be obvious to persons skilled in the art in view of the foregoing description.

Having thus described our invention, it is obvious that various immaterial modifications may be made in the same without departing from the spirit of our invention; hence we do not wish to be understood as limiting our invention to the exact form, construction, arrangement and combination of parts herein shown and described, or uses mentioned.

'hat we claim as new and desire to secure by Letters Patent is:

1. In a device of the kind described, a casing, means for retaining certain sized crystals in circulation with liquid and removing other crystals from circulation comprising a calandria. said calandria having upright tubes and a well at its center, a trough beneathsaid calandria, having an arcuate bottom, the free edge of which is spaced from said casing. and a circulator disposed above said trough and normally discharging thereinto.

2. In an evaporator, means therein for removing certain sized crystals from circulating liquid, said means including a trough, and means for selectively removing portions of a wall of said trough.

3. In a device of the kind" described, an evaporator, an annular trough of arcuate cross-section spaced from the bottom of said evaporator, the inner peripheral edge of said trough bounding an elevation at the middle of said trough, a circulator above said inner peripheral edge, the outer peripheral edge of said trough spaced from the sides of said evaporator.

4. In an evaporator, a casing, means therein for increasing the size of crystals including a calandria, and a trough disposed be-' neath said calandria having an arcuate bottom, the circumferential edge of said bottom being spaced from the side walls of said evaporator.

5.'In an evaporator, a casing. means therein for increas ng the size of crystals including a calandria. and a relatively shallow trough disposed beneath said calandria having an arcuate bottom. the circumferential edge of said bottom being spaced from the side walls of said evaporator.

6. In a device of the kind described, a casing, means therein for retaining certain sized crystals in circulation with liquid and allowing larger crystals to drop from circulation comprising a calandria, said calandria hav-- ing upright tubes and a well at its center, an annular trough closed at the center thereof and having its free edge spaced from the walls of said casing, and a circulator disposed above said trough.

'7. In an evaporator, a casing, and means therein for selectively retaining crystals in circulation comprising a trough having its circumferential edge spaced from the inner walls of said casing, said trough being variable in diameter.

8. In a device of the class described, a casing, a calandria disposed within said casing aving a central wall therein, an arcuate trough spaced from the bottom of said casing and having a wall thereof spaced from the casing, said trough being formed of separable annular sections whereby its diameter may be varied so as to vary the size of crystals produced by said device, and a circulator disposed above said trough.

9; In a device of the class described, a casing, a calandria disposed Within said casing having a central well therein, an. annular trough spaced from the bottom of said casing and having a Wall thereof spaced from the wall of said casing, of separable annular sections whereby its diameter may be varied so as to vary the size of crystals produced by said device, and a circulator disposed above said trough.

10. In a device of the kind described in cluding a casing, trough spaced from the bottom of said evaporator, the outer edge of said trough being disposed in a plane below the center portion of the trough piece, a circulator above the outer edge of said trough, said edge being disposed relatively to the casing of the device to provide a space through which relatively large crystals may pass from circulation.

11. In a device of the kind described ineluding a casing, ail evaporator, a trough spaced from the bottom of said evaporator the trough having an annular depression, a circulator arranged above the trough, said trough being disposed relatively to the casing to provide a space through which relatively large crystals may be withdrawn from circulation. V

12. In a device of the kind described. an evaporator, an annular trough in said evaporator, the inner and outer peripheral edges of said trough being raised with respect to the annular bottom of said trough, a ('irculator above the inner peripheral edge of said trough, a calandria above said trouglnthe outer peripheral edge of said trough being spaced from the inner walls of said evaporator whereby relatively large crystals are dropped from the circulating liquid;

3. In an evaporator, a CfllfllldlltL'Hfi aunular trough arranged immediately below the calandria and being spaced from the bottom thereof. and means including said trough for circulating liquid in opposite directions through different parts of the calandria and retaining relatively small sized crystals in circulation, separating larger crystals from said circulating liquid and \vitlulrawing said lar er crvstals from circulation. said troiwh 1 bciug \ariahlc and providing nicans regulatsaid trough being formed an evaporator, an annular culation.

In testimony signed my name.

whe

In testimony wlie signed my name.

reof, I have hereunto JOSHUA a. RAY;

reof, I have hereunto THOMAS RAY.

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