US94959A - Improved apparatus for evaporating cane-juice - Google Patents

Description

theta sata l Nsubnet @Ww L. s. HEREFORD, OF-vvEsT BATON ROUGE PARISH, Locust/WA.l

Lette/rs Patent No. 94,959, dated September 2l, 1869.

F .IMPRovnDAPPARATUs FOR VAPORATING CANE-JUICE.

The Schedule referred to in these Letters Patent and making part of the same.

To .all whom it ma/y concern.-

lie' it known that 1 L. S. HEREFORD, ofthe parishl of West .Baton Rouge, State of Louisiana, have in and'thus to reducethe cost of evaporation; to reduce the number of boilers that are employed to effect evap oration to two, andthusto reduce the cost of what is known as a set, which usually embraces iiv'e boilers;

to provide means for conveying allforeign matters that. l rise to thesurface of the juice while it is boiling, into a suitablerecipent', with little or no skimming; to attach said recipient tothe boilers in such manner as to make it practically a part of the organism of which they (the boilers) constitute -the principal part, and to provide means for taking the sirup which escapes with the foreign matters `into the recipient out of the same, and putting it back into the boilersgwithout the use of a ladle, or the likeusual appliance that is employedfor such purpose; to provide for au extension of the tire-smface beyond that which is presented by the external'surfaces of the,

boilers, and for regulating the draught fromthe furnace, `so as to prevent the application of a destructive Adegree of heat, and all consequent injury to the sugar.

My invention :consists of the combination, under a particular arrangement, of two semicircu ar, open-top boilers, in each of which there are at least two re- `tlues, sufficientlylarge to allow of the free and rapid passagerof the heat and llame from the furnace through i them, that are severally provided with a damper, to

regulate the draught, .and thus prevent the development of enough heat to burn'the saccharine that is contained in the juice at anystage ofthe evaporation, a transverse refiise-recipient, for collecting the lforeign matters that are brought to the surface by the boiling ofthe juice, and the action ofthe lime that has been placed therein, from which two pipes, that are provided with stopecocks and perforated diaphragms, lead into the boilers, one into each, to serve as conduits for the juice or sirup which passes out of the boilers withthe foreign matters, back` again into the saine, and two troughs, to convey the foreign matters into the recipient therefor, which are placed at the top outside edge of each boiler respectively.

But my invention will be better and more quickly understood by referring to the drawing, on which- A A represent my boilers, and

B B' B B, the tire-fines, that are placed longitudinal-ly therein.

It will be observed that the boilers present crossvsections, that are very nearly semicircular 'up to the point to which their external surfaces are exposed to 'the fire, which is indicated clearly at iigT 3 by the lines Al 2 3, `but that above that point the sides present a curvature, having a longer radius, so that'the crosslsections of the whole ot' each boiler present elliptical conformations,rather than true semicircles. ject accomplished by giving the boilers this form is the greatest possible .measure oi' tire-surfacel .underneath the same, and a greater containing capacity than would be possessed by them if they were exactly semicircular.

rlhe lines, it will be seen, extend the wholelength of the-boilers, andare sufficiently large to offer noap- Vpreciable impediment to the free and rapid rush of the flame and heat through them, and to extend the re- `'surface to about double what it would be, Yii' entirely confined to the external surfaces of the boilers, coilnecting with the open space of the furnace, at the rear-ends of the boilers, the lines lead ,at the front ends thereof into a breeching, C, techically 'so called,

which, in its turn, .leads into the stack or chimney, which carries off the products of combustion.y

` vAt the front of the breeching', an opening', D, is

made in front of the flues of each boiler, which are covered by hinged dainpers E, as shown at the left-hand boiler at iig. 2. i

The dampers E are provided with bars Fthat are attached to and project above them, to serve as handles to operate' or move them ,into any desired position. These bars F are Weighted at their upper ends, so as to overbalance the weight ofthe damper's, when the latter are placed in horizontal position, as shown at the right-hand boiler at iig. 2. This position coinpletely shuts oif the draught, for the space between the damper-s, on the line 4, iig. 2, is closed by a plate in the breeching, against which the damper impinges,

when placed therein, and cuts'of communication bep tween the iiues of the boiler, at the front of which it is placed, and the chimney or smoke-stack. If. the hinges of the dainpers are so made as to work with .some degree of stiffness, they will themselves hold the dampers in any given intermediate position between that shown at the right-hand boiler and that which it occupies at vthe left-hand boiler at iig. 2; but if j the hinges work too loosely'to do this, any ordinary appliance or means'may be employed to accomplish the object. y

On each upper outside 'edge of the two boilers, a

trough, G, is' provided, that extends from the front ends of said boilers, afew inches beyond their rear ex tremities, as shown ali-iig. 1, where their open ends occupy a position over the recipient H, so as to insure the tlowin g into .the latter of whatever gets into them of a liquid nature.

The recipient H is placed in direct contact with the boilers, at their rear ends, and in such manner that its bottom shall occupy a horizontal plane, that is coincident, or very nearly so, with a line that crosses the boilers at the top of the fines, as shown at figs. 2 and 3. The size of the recipient H shouldbe sulicient to enable it tc'hold all the foreign matters expelled from the juice during the process of evaporation, with such portion of the juice itself, as may pass out of the boil# ers with the same. To convey this juice back into the boilers, I insert thelshort pipes 5 6 into the recipient, in which I introduce perforated diaphragms, if necessary to strain the juice,and fix stop-cocks, so as to be able to open or close the said pipes at pleasure.

A pipe, 7, at one end of the recipient, affords ameans for drawing off the foreign matters, or, as they are called yby sugar-makers, the skimmings The front plates ofthe boilers, the outsides of the troughs G G, and the rear side of the recipient H, all rising several inches above the boilers, and being,r connected at the four corners c c c" c', constitute a rim, which prevents the juice' from boiling over externally, while the ledge d, projecting upwardly between the boilers to-the same height as the outer rim, prevents one boiler from boiling over into the other.

My boilers, and everything about them, are made of sheet or plate-iron, of proper thickness, and in such and composes but a portion of a single organism, as shown 0n the drawing.

' Any suitable furnace, made of brick, and constructed upon any approved plan, may be used in connection with my invention. Y

I do not restrict myself to thc use. of any furnace,

ship, but hold myself at liberty to use any I may see fitto employ. Nor do I restrict myself to any specific length or diameter in making my boilers, but they should never be so extended vin length as to make it diicult to force the iiame from the grate or ire-bed to their rear ends, at which point there should always be sutiicient space in the furnace to allow of the easy deflection ofthe said flame into the fines.' To withdraw the sirup from the boilers, pipes 8 are employed, which pare provided with 'stop-cocks, to close them when not in use.

Having thus described my invention,

NVhat I claim, and desire to secure by Letters Patent, is

The twoelongated semi-cylindrical or elliptical boilers A, when provided with ilues B B B" B, and the dampers E, in` combination with the troughs G and the recipient H, when the latter is provided with the pipes 5, 6, and 7,in which are 4placed stop-cocks, and all the parts are constructed, arranged, and operate substantially as described, for the purpose set forth.

L. S. HEREFORD. Witnesses Gnonen MoRRow, H. N. JENKINS.

manner that every part is connected with the others, I

provided, always, I invade no private right or owner-

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