USRE1675E - Improvement in apparatus for treatinj silicious substances - Google Patents

Description

G. E. VANDERBURGH.

Treating Alka l ies.

Reissued May 17 1864.

. To all whom it nary concern.-

v UNITED, STATES PATENT OFFICE.

GEORGE E. VAN DlQliBUliGll, OF MAMARON'ECK, NEW YORK, ASSTGNOR, BY MESNE ASSIGIMENTS, TO NE W YORK QUARTZ OOH PANY, OF NE W YORK.

lMPROVEMENT IN AFPARATUS FOR TREATING SILICIQUS SUBSTAQCE S.

S p ecification forming; part of Letters Patent No; 28.540, dated his-W29, 1800-: Reissue No, LEQLdat-cd,

' April 1, 1862; Reissue No. 1,675, dated May 17, 1864.

DIVISION 13.

Be itknown that l, GEORGE E. VAN DER- B ERGH, of M u-maroneck, in the county of \Vestchester and State of New York, have invented a new and improved digesting apparatus to be used in connection with superheated steam for the purpose of reducing silicious and-other refractory substances to a liquid or gelatinous state; and I do hereby declare that the following is a full, clear, and exact description of my invention.

My said improved digesting apparatus is constructed in such a manner that the sub stance to be dissolved therein will, when the valves, &c., constitutes my improved apparatus for the treatment of silicious and other refractory substances.

This digesting-chamber may be of a cylindrical shape, and may be composed of double sides a a, and double heads cl d, combined with each other in any suitable manner. The heads d d of said chamber are centrally perforated for the reception of the short hollow shafts h h, which work in packing-boxes within said perforations. The pipe '1, which conducts the superheated steam into the digester, passes through the shafts h h, and the joints between the said pipes are rendered stcanrtight by means of any suitable packing. The hollow shafts hh have radial arms upon their inner ends which are connected to elevators la la within the digcster, that extend the entire length of the same, while their outer ed ges are brought nearly in contact with the inner casing of the digester. Arms m m from the main stcam-pipe I support the curved shield at, and radial hollow arms o o from the said steam-pipe l support the slitted longitudinal steam pipes 12 p, which discharge the superheated steam into'the digester. The

proportions of the itbOVGJDGIliZlOnOd parts are such that the elevators it 75 can revolve freely around the shield at and the slitted steampipes p p. Motion is impartedtto the elevators k k by means of the toothed wheels 9 g on the shafts h h and thepinions f f on the drivingshaft (2. The said diges'ter is provided with a man-hole and with other suitable valve-closed openings, and also with an instrument for indeating the temperature within the same.

q is the man-hole stopper; r,'the valve that closes the aperture through which the silicate is withdrawn from the digester; tt, the trycocks, ands the instrument for indicating the .tempmrature vwithin the digesterw- Steam is admitted into the spaces between the double heads and double sides of my improved digester for the purpose of preventing the condensation of the superhead steam which is introduced into the inner chamber.

Suitable pipes are provided for drawing off the water produced by the condensation of this protecting body of steam.

If preferred, the digester may be madeof'a single thickness of metal and be walled in with brick or other suitable material, for the purpose of preventing the contact of the atmospheric air with the metallic surface of the digester, and the consequent condensation of the superheated steam therein.

The operation of this apparatus is as follows: I place within the digesting-chamber a suitable quantity of water, and then charge the apparatus through the man-hole with the proper quantity of the substance intended to be dissolved. The superheated steamis now admitted through the pipes provided for that purpose and a revolving" motion imparted to the elevators. ,As each bucket or elevator k passes throughQthe substance placed in the bottom of the digester, it becomes charged with a portion thereof, which is elevated until brought into contact with the current or currents of superheated steam admitted into the chamber as aforesaid. The effect of this contact is to dissolve a portion of ,the substance acted upon, which dissolved portion, as the bucket continues its revolution, is taken up by thewater in the bottom of the chamber. At each revolution of the buckets some portion of the solid substance is reduced to a liquid or gelatinous state, until finally the entire mass is so reduced, when it is withdrawn from the digester, and the apparatus is ready vto be recharged for another operation.

'Thesilicions or other refractory substance, it submitted to theaetion of the superheated steam withoutbeing previously immersed in the water, would probably be decomposed thereby.

I do not intend to limit myself to any pre-.

cise method of constructing my improved digesting apparatus, provided it be so con- ;structed as to enable the substance placed therein for the purpose of being dissolved to .be continuously elevated above the surface, of

the liquid or gelatinous matter in the lower portion of the digesting-chamber, and into direct contact with currents or jets of superheated steam in thenpper portion of the same. What I claim as my invention, and desire to secure by Letters Patent, is- The employment of superheated steam in a digesting apparatus constructed and operating substantially in the manner herein represented and described, for the purpose of reducing silieious and other refractory substances to a liquid or gelatinousstate.

' The foregoing specification signed this 8th day of April, 1864.

. GEORGE E. VAN DERBURGH.

- Witnesses:

Gno. A. MAYHEW, GHAnLes DRAKE.

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