US401609A - Apparatus for treating vegetable substances - Google Patents

Description

7' 2- Sheets-Sheet 1. J. D. TOMPKINS.

APPARATUS FOR TREATING VEGETABLE SUBSTANGES. No. 401,609.

(No Model.)

Patented Apr. 16, 1889.

ii. Illllli N, Patina imam-lithograph", wminmn. D.C.

2 Sheets--Sheet 2..

(No Model.)

J. D. TOMPKINS. APPARATUS FOR TREATING VEGETABLE SUBSTANGES.

Paten ted Apr. 16, 1889.

UNITED STATES PATENT OFFICE.

JOHN D. TOMPKINS, OF BRAINARD, ASSIGNOR TO THE TOMPKINS PAPER STOCK COMPANY, OF ALBANY, NEWV YORK.

APPARATUS FOR TREATING VEGETABLE SUBSTANCES.

SPECIFICATION forming part of Letters Patent No. 401,609, dated April 16, 1889.

Application filed February 9, 1888. Serial No. 263,502. (No model.)

To all whom it may concern.-

Be it known that 1, JOHN D. TOMPKINS, a citizen of the United States, residing at Brainard, in the county of Rensselaer and State of New York, have invented certain new and useful Improvements in Apparatus for Treating Vegetable Substances for Making Paper- ?tock, of which the following is a specifica- My invention relates to the class of apparatus for reducing wood, straw, grasses, and other suitable vegetable substances by means of a chemical liquor and pressure of steam in the process of cooking, in which the chemical cooking-liquor is circulated at will in alternating reversed directions through the digesting-chamber and the material massed within, as described in Letters Patent No. 340,640, dated April 27, 1886.

The object of my invention is to provide a special construction of the annular internal series of connected pipes for receiving live steam and the condensed-steam pipes, whereby said pipes can be readily placed within the digesting-chamber in sections and be united together and be taken apart and removed at will for coating their outer surfaces with metal which will not be corroded by the action of the chemical cooking-liquid employed within the apparatus. I attain this object by the means illustrated in the accompanying drawings, forming a part of this specification, in which- Figure 1 is a sectional view of the digestingvessel. Fig. 2 is a transverse sectional view taken on the line 1 in Fig. 1. Fig. 3 is a transverse sectional view taken on the line 2 in Fig. 1.

The same letters of reference refer to like parts throughout the several views.

In the drawings, A represents the digestingvessel, made of any selected form and dimensions and of material which will .be adapted for use in any selected known treatment of vegetable substances in either alkaline or acid chemical cooking-liquors under pressure and heat.

B is an upper strainer, and C the lower strainer.

O is the lower liquor-chamber, and D is the upper liquor-chamber and a steam-chamber combined.

E is a passage-way leading from the manhole F (closed by plate F and crows-foot and bolt) through the steam and liquor chamber D and upper strainer, B, to the digestingchamber a for passage of the wood, straw, or other material to be treated. Pipe b connects the chamber 0 with any suitable liquor-circulating pump, A and pipe 0 connects chamber D with the same pump, so that by their joint operations the cooking-liquid within the digester can be circulated at will. At the bottom of chamber 0 is liquor-discharge pipe (Z, provided with valve 6, for drawing the liquor from the digesting-chamber. A suitable blow-off pipe, f, provided with a suitable valve, (not shown,) is provided for discharging at will the cooked product, and pipe g (indicated by dotted lines and shown by full lines in Figs. 2 and 3) serves as a live-steam pipe leading from a suitable steam-generator (not shown) to the lower end of the digestingchamber and at a point about relatively opposite the blow-01f pipe f.

The above-described parts are old and form no part of this invention.

H H are vertical steam-pipes so arranged within the digesting-chamber a as to form a connected series of pipes, which are in near neighborhood all around the inner surface of the wall of said chamber and form a circle of pipes which will be concentric to the mass of material forming the charge to be operated with and will permit the cookingliquor to surround and have contact with the surfaces of the respective pipes in the series. I yoke these pipes together in pairs at their upper ends by the coupling-pipes h 71., Figs. 1 and 2, and also in pairs at their lower ends by couplingpipes h h, Figs. 1 and 3. The latter coupling pipes, h, connect the neighboring pipes of adjoining pairs which the upper end coupling-pipes connect, substantially as shown. The connected pipes of one of the pairs (held in union by connections h at their lower ends) are prevented having communication with each other by a suitable plug, 1), (shown in Figs. 1 and 3,) which plug effectually closes the lower ends of said connected pipes, so that steam cannot pass from one to the other in a direct manner. {any other form of stop suitable for prevent- 1ng communication of the said pipes with each other can be used in lieu of said plug i. One of the pipes in this uncommunicating pair is connected with live-steam pipe J, (indicated by dotted lines in Fig. 1 and shown in Figs. 2 and 3,) which is provided for conducting live steam from a suitable steam-generator (not shown) to supply steam under pressure to the series of pipes H H. The other one of this uncommunicating pair of pipes is provided with a steam-vent or blow-oif pipe, K, provlded with a valve. The other one of this uncommunicating pair is provided with a vent or blow-01f pipe, K, by means of which the a1r within the pipes of the series can escape before the incoming steam, and air be admitted when the volume of steam within the pipes is reduced. L is the condensed-steam pipe, which pipe is connected at intervals with coupling-pipes h h of the series of steam-heating pipes H H by the nipple-connecting tubes m m, so that the water resulting from the condensation of steam in said pipes can readily run therefrom and be returned into said pipe L, to escape thence through the outlet-pipe M into a suitable steam-trap, N. I prefer to form this pipe L by means of the sections of pipes Z l and coupling-tubes n n, as shown; and in such a case the coupling-tubes can be provided with screw-threaded nipples, with which the connecting-tubes m m will connect in coupling the pipe L with the coupling-pipes h h of the steam-pipes H H. i

The exterior surfaces of the several pipes and coupling-pieces and tubes can be coated with lead,which is readily done by any known process when the parts are disconnected. This lead-coating will prevent acid liquors from corroding the iron of said parts. By making this is of great advantage, and effects a saving of I both time and labor over the outlay required to be had when internal steam-heating pipes are constructed and placed in the digester in bulk or divisions, which necessitates the removal of a head of the vessel.

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

1. In apparatus for making paper-stock, the combination, with a digester, of a circular series of vertically-arranged pipes extending the entire length of the digesting-chamber and arranged in pairs a short distance from the interior walls thereof, the neighboring pipes of the several pairs being connected at their lower ends by couplings, and the pairs at their upper ends, as described, a plug in one of the lower couplings, and the live-steam inlet and bent pipes connected with the adjoining pipes, separated by the plug 2', substantially as described.

2. The combination, with the digestingchamber, of the circular series of pipes connected above in pairs, the couplings h, connecting the neighboring pipes of the adjoining pairs below, the plug 1' in one of the couplings h, the inlet and bent pipes J K, a circular condensed-steam pipe connected with the couplings h, and a pipe, M, connected with said condensed-steam pipe for carrying off the water of condensation.

JOHN D. TOMPKINS.

Witnesses: 4

CHARLES WETHERWAX, CHARLES SELKIRK.

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