USRE7266E - Improvement in apparatus for drying bone-black - Google Patents

Description

P. FARLEY.

APPARATUS' FOR DRYING BONE BLACK.

Vl'fuessuerl Aug. 15, `1876.

ngi.

UNITED STATES PATENT CDEEIcEc d PETER FARLEY, OF NEW YORK, N. Y.

IMPROVEMENT IN APPARATUS FOR DRVlNG BONE-BLACK.

Specification forming part of Letters Patent No. 113,754, dated April 18, 1871 reissue No. 7.266. dated August 15, 1876; application tiled August '20, 1875.

T0 alt whom Iit may concern.- y

Be it known that I, PETER HARLEY, of the city, county, and State of New York, have invented a new Improved Apparatus for Drying Bolle-Black; and do hereby declare that the following isa full, clear, and exact description thereof, reference being had to the accompanying drawings, wherein- Figure 1 is a vertical longitudinal section ot' the aiiparatus. Fig. 2 is a vertical transverse section thereof. Fig. 3 is an inverted plan view, partly in section.

Similar letters of reference indicate corre spending parts.

The nature ot my invention consists, tirst, in a drier consisting of heating and drying chambers, which is so constructed and arranged with reference to a kiln to burn the boneblack that the surplus heat from it is employed and utilized for drying purposes, and the wet bone-black is automatically dried and discharged directly into the retorts in the kiln; second, in the construction of the drying-chambers, the employment of inclined surfaces to deflect the bone-black toward and upon the heating-surfaces automatically and continuously; third, in the details ot' construction.

In the manufacture of sugar, the bone-black employed in clarifying is repeatedly used. For that purpose it-is necessary that -it should be reburned, and in order to prepare it for the retorts it is necessary to dry it.

Previous to my invention the Wet boneblack has been dried by spreading it upon heated plates, on which it was stirred and turned over by manual labor. 'When sufficiently dried it was carried to and fed into rctorts also by manual labor. This was a tedious and expensive process, and was calculated to pulverze the bone-black and destroy its value for purifying purposes. A

My invention enables me to dry it much more rapidly and thoroughly, to preserve it from injury, to do it with much less labor and expense, and to utilize the entire surplus heat from the kiln in which it is subsequently burned.

For this purpose I have provided a heatingchamber, as shown by the-interior lines of Fig. 2, made of metal or other suitable malterial, preferably with vertically-corrugated sides aa., which' are slightly inclined, as shown in said Fig. 2. Within the heating-chamber are arranged shelves b b, perforated or open at alternate ends, as shown in Fig. l. The heat from `the furnace 0r kiln below enters the heating-chamber between the bottom and lower shelf b, through an oritice shown in the dotted lines in Fig. 2, and moves in a zigzag course between the shelves b, until it reaches the upper part, where it is discharged, by a similar oriice and vertical pipes c, to the chinmey d. By this arrangement the escape ot' the hot air, or products ot' combustion, is retarded, and the maximum heating capacity ot' the chamber obtained. On the sides of the heating-chamber a drying-chamber is constructed by means of a suitable frame, provided with slots arranged at intervals to receive a series of slats, B B, inclined downward and toward the sides ot' the heatingchamber. These slats may be made with 'their inner edges straight or scalloped parallel with the corrugations in the sides of the heatingchamber, and extending to within a short distance ot' the latter. The sides of the dryingchambers, between the slats, are open to admit of the escape ot' the steam from the drying bone-black and the admission of air. lhe

apparatus, and terminates at or near the discharge-openiu gs, thus forming an inclined door or bottom to deilcct and discharge the dried material through said openings. The bottom of the drying-chamber is closed by anges e e,-

in suitable masonry or other supports, overA a kiln or furnace, so that the discharge-openings will discharge the dried material automatically into'fthe retorts or other receptacles below, and is connected with said kiln or furnace by a flue, through which the surplus heat therefrom is conveyed to the heating-chamber. l

In operation, the wet bone-black is fed into t-he top of the drying-chamber, and by 'the slats Ais constantly and slowly deflected toward the sides of the heating-chamber (the lower slat is continued to the bottom of the stmnn escaping' 'between the slats) until it reaches the lower sl it, when it is deflected to the openings in the bottom. When Sufciently dried the slidrsj'nro pulled out, and the boneblnck is discharged uutonmtieelly nthe retorts underneath. The slides nre then replaced and the operation repeated.

Having described my invention, what I claim its new, and desire to secure by Letters Patent, is

1. -Adrier for dryn g bone-black, constructed and arranged substantially as described, so as to employ and utilize the surplus heat from the kiln, and to automatically dry and discharge the bone-black, when dried,iuto the retorts.

2. In a drier, incl-ined sluts or surfaces, in combination with a radiating' heating-surface, constructed and arranged substantially ns described, to constantly and automatically deflect the material upon the heating or radiating surfaces.

3. The inclined slats B B, applied to the heating-chamber, substantially as described.

PETER FARLEY.

Witnesses:

E. B. BARNUM, PHILIP BOTTMAN.

Images