US1263470A - Extracting apparatus. - Google Patents

Description

D. C.-REYNOLDS.

EXTRACTING APPARATUS.

APPLICATION FILED MAR. 2?. 19m RENEWED FEB. 27. I918.

11 m Patented Apr. 23, 1918.

2 SHEETS-SHEET I.

D. C. REYNOLDS.

EXTRACTING APPARATUS. APPLICATION HLED MAR. 27, 191i- RENEWED FEB. 27' I918.

Patented. Apr. 23, 1918.

2 SHEETS-SHEET 2.

Specification of Letters Patent.

trlnal application filed tune ea, 1916, Serial No. 105,311.

Patented Apr. 3, Divided and this application filed reh 2'1,

191?, herlal No. 157,828. Renewed February 27, 1918. Serial 1110. 219,538.

To all whom it may concern:

Be it known that T, DANIEL C. REYNoLns, a citizen of the United States, residing at Philadelphia in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Extracting Apparatus, of whlch the following is a specification.

The 0b]6Ct of the invention is to provide an improved apparatus for extracting from barks certain of their ingredients.

Another object is to provide in such an apparatus improved receptacles in which the barks are steeped, and in which the volume of the liquid obtained is reduced by evaporation. I 1

Further objects of the invention consist in providing an apparatus which obtains the greatest possible quantity of extract from a given amount of bark; which consumes the least possible amount of steam;

which can be cleaned with the most convenience; which permits the liquid carrying the extract from a given batch-of bark to be raised in specific avity by reboiling with a second batch of ark with the least operation and waste enepfigy; and which in every way increases the e ciency of the process.

The preferred embodiment of the invention comprises elements fully described, and illustrated in the accompanying drawin s in which Figure 1 is a perspective view 0 the whole system; Fig. 2 is a vertical diametrical section of one of the set of extracting tanks; Fig. 3 is a vertical section of the evaporating tank; Fig. 1 is a horizontal section on the line 4i4 of Fig. 3; Fig. 5 is a section on the line 5-5 of Fig. 3; and Fig. 6 is an enlarged detail view ofone of the supports used in the tanks for positioning the tubes.

Referring to Fig. 1 of the drawings, the preferred arrangement of the apparatus employed in carrying out the present invention is shown as comprising four extracting tanks A ,A ,A and A provided with drain pipes 1, having regulating valves 2, and leading from the bottoms thereof to a common pipe 3, which drops to a lower level and thence through branches 4, controlled by valves 5, into storage tanks B B and F.

From the lowermost portions of the lastnamed tanks liquids are led through ipes 8, provided with valves 9, and thence through a common pipe 10 to a centrifugal pump 11, driven by any suitable power (not shown), w h1le from said pump the pass through a p pe 12 upwardly and by ranches 13, provided w1th valves 14., to the upper portions of said first-named tanks.

For the purpose of heating the contents of the extracting tanks, and one of the storage tanks, the same are provided with steam COIlS 18 ad acent to their bottom walls and are of any suitable construction, but preferably of the arrangement shown in Fig. 2, each of said coils communicating at one end through suitable reducing valves 19 with a steam supply line 20, leading from any desired source (not shown). At their opposite ends said coils communicate through individual traps 21 and a common pipe 21 with a vacuum line 22, leading to a vacuum-producing device (also not shown).

From one point of the steam supply line, an extension 23 leads to another coil 24 in the bottom of an evaporating tank 25, said extension being provided with a valve 26, which however is not necessarily of thereducmg type, the other end of said coil opening through a trap 27 and a pipe 27 into a condensation well, whence this pure water with its latent heat units is reheated and reinjected into the boiler forming the source of steam supply. Said evaporating tank is adapted to be filled through a pipe 30 into which lead branch pipes 31, provided with individual valves 32, from the bottoms of each of the said storage tanks.

The storage tanks are simply cylinders,

either with or without covers, but without any special interior construction, except in the case of the one which, as above described, is provided with a steam coil for maintaining the contents of said tank heated until they are drawn ofi'. However, in the extracting tanks the construction is similarto that shown in Fig. 2, and herein lies one of the principal advantages of the system and process, as compared with those known to be at present in operation.

A tank 35 is provided with a substantiall horizontally extending partition 36 at a re atively short distance from its bottom well, said partition having an aperture 37, while from the sides of the latter is a relatively short section of tube or pipe 38, wh1ch extends into, and to a point adjacent. to the bottom of, a cup 39, forming with saldtube a trap for a purpose hereinafter descrlbed. Extending through said partition and upwardly to a point but a short distance below the plane of the upper termlnus of the sides of the tank is aseries of substantially parallel tubes 41, open at both ends and supported in spaced relation with the sides of the said walls by brackets 42, to which said tubes are secured by straps 43. Spanning the opening 37 in the partition 36 1s a suitable strainer 44, which keeps solid particles from entering and clogging said trap.

In the operation of the device as thus far described, one or more of the extractlng tanks is substantially filled with very finely divided bark to a point a short distance below the top of the former, while water s poured upon the same until the said bark is covered, the water being preferably supplied in the nature of a spray acting to settle the dust of the bark, while the operation of fil1- in the tank is proceeding.

team, preferably at about sixty pounds pressure, is then turned into the coil 1n the bottom of the tank and the water heated until it boils hard, this action being maintained for approximately twenty-four hours,

and during this time the formation of steam adjacent to the coil and below the partition, being unable to ass through the latter by the trap, forces t e water in the tubes 41 upwardly in a practically constant stream, whence it sprays over the bark, upon being turned downwardly by apertured caps or deflectors 46, and percolates through the mass. Gradually in this manner the juices of the bark are extracted, and the water containing the same is run off by gravity into any one of the storage tanks.

If the extract thus formed is not sufiiciently dense to come up to the required Baum, the same is run into the storage tank having the heating coil, from whence it is taken and by the centrifu al pump forced upwardly into the origina, or another, of the extracting tanks upon a fresh charge of bark. The same process of boiling and percolating is then continued, after which, if

the desired specific gravity has been at tained, the extract is run ofl' into a storage tank, and then, if desired, into the evaporating tank.

- partition to a The evaporating tank 25 comprises a cylinder 50, prefera ly supported by legs 50' and having adjacent to its bottom wall the coil 24 hereinbefore referred to, and near to its upper portion a substantially horizontal partition 51, provided with an aperture 52, partially closed by a strainer 53, and having a tube 54 depending therefrom and into a deep cup 54, to form a trap similar to the one previously described, but larger in proportion for the pur ose of accommodating the liquid which be ore being drawn from the tank is heavy and slug 'sh like molasses said cup preferably exten ing through an below the bottom of the tank, and drainable by a valve 54.

The upper part of this tank terminates in a large, flaring, funnel-shaped section 55, and a series of parallel tubes 56, extending from below and through said partition, terminate near the lower part 0 said section, while they are held in spaced relation from the walls thereof by brackets 57, similar to those hereinbefore described. The relatively light liquid extract which enters this evaporating tank, is heated to the boiling point by the steam coil 24, and is forced by the steam upwardly through the said tubes and sprayed into the air, where little by little it loses its moisture and in falling back is led into the tank and thence through the partition by way of the trap described.

Having thus described my invention, what I claim and desire to protect by Letters Patent of the United States is 1. In an extracting apparatus, the combination of a tank, a substantially horizontal partition therein having an aperture, a trap partially obstructin said aperture, and operative to permit on y a unidirectional flow of liquid through saidpartition, a series oftubes extending upwardly through said partition, and means in said tank below said partition to heat the contents of the former.

2. In an extracting apparatus, the combination of a tank, a partition therein having an aperture, a trap partially obstructing said aperture and operative to permit only a unidirectional flow of liquid through said partition, a tube extending through said partition to a point near the top of said tank, and a flared extension of the walls of said tank to direct liq'uid falling thereupon back into said tank.

3. In an extracting apparatus, the combination of a tank, a partition therein having an aperture, a trap partially obstructing the said aperture and operative to ermit only a unidirectional flow of liquid throu h said partition, a tube extending throng said oint near the top of said tank, means wit in said tank and below said partition to heat the contents of the former,

liquid lrem any out the latter ta u It any ed the former, and an evaporating tank adapt- 10 ed to receive liquid selectively from any of said storage tanks.

In testimony whereof I have in: signature.

DANIEL C. REYNOLDS.

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