US960702A - Apparatus for concentrating sulfuric acid. - Google Patents

Description

O. PROELSS & W. S. HALL. APPARATUS FOR GONUENTEATING SULFURIC ACID. urmoumxq Hum JAN. 6,-1910.

Patented June 7, 1910.

2 sums-sum 1.

0. PROELSS & W. SQHALL. APPARATUS FOR GONGENTRATING SULFURIO ACID.

' APPLICATION IILED .TAN.6. 1910.

960,702, Patented June 7, 1910.

2 BHEETS-BHBET 2.

' o'rro ritoELss. or Kansas orry, MISSOURI, AND WALTER s. HALL, or ARGENTINE,

icr sans rarn' anion ;K;ai isAs.

eeoroa.

i To all whom it may concern:

- Specification of Letters Patent.

APPARATUS-FOR CONCENTRATING: SULFURIC ACID.

Patented June 7, TQM).

Applicatioi filed January s, 1910. Serial No. aaen'oa.

which is provided with an inner rod 14 for of said-flange is rovided with an annular, Be it known that we, O'r'ro PRoELss, of upwardly-'extende rim or wall 6 terminat- Kansas City, in the county of Jackson and ing at the top in an oflset recess 6 for the State of Missouri, and WALTER S. HALL, of periphery of the metal cover 7 (Fig. 1) to 5;:Ar'gentine, in the county of Wyandotte andfit into. The cover of the boilers consists co State of Kansas, have invented certain new of the outer part 7 having a large opening and useful Improvements in Apparatus for arranged centrally over the primary boil- .Concentrating Sulfuric Acid, of which the ing pot 5, and an upwardly-extended filled following is a specification. part 8 having a base adapted to fit into an 1 Our-invention relates to apparatus for oflset recess around the openingof the part at the concentration of sulfuric acid, by evap- 7, similar to that at 6* so as to have said part oration; and the objects of our improve- 8 cover said large opening and support its ments are, first to provide means whereby a interstitial fillin directly over said pot 5. I volume of weak acid may be primarily boiled The c centric ciamber, between the walls and continuously passed off automatically of the ot 5 and 6 of the flange 5 consti- 7o into a shallow secondary boiler where a less tutes a secondary boiling vessel into which quantity of'the stronger acid is further subthe acid passes from the bottom of the pot jected to heat to produce the highest concen- 5 and is the place where the final boiling tration capable of being produced'by evapof the acid is'done. oration and passed thence to a cooler; and, The upper portion of the pot 5 above a 75 second, to' arrange a cover in conjunction jog 5 in its wall, the entire inner surface with the boilers in such a manner that the of the wall 6, and of the 2-part cover 7 and acid vapors rising from the boilerswill'be 8, are lined with a layer 9 of acid tile, in condensed and automatically returnedto the order to protect the metal (castiron) of primary boiler. which these parts are made, from the corso We have attained these objects by the aprosive action of the fumes. rising from the paratus constructed as illustrated in the ac--' acid being treated, to which such surfaces companying drawings in which- "would otherwise be subjected in operation.

Figure 1 is a central vertical section of the The pot 5 is provided with a tubular procover and boilers in conjunction with a 'ection 10 at the bottom which Is. extended 85 cooler shown in elevation. Fig. 2 is an en-. horizontally out through an opening in the larged plan View of the boilers without the wall of the fireplace and has a vertical cover. Fig. 3 is an elevation of the parts branch 10 which extends up through the shown in Fig. 2. v flange 5 so that when acid 18 filled into the Like reference numerals marked on the pot 5 sufficiently to rise above the plane of so drawings refer to like parts throughout the said flange 5 it will overflow upon said several views. flange throu h said branch 10. The con- The numeral 4 desi nates'a furnace or centric chain er between the walls 5 and 6 fireplace, consisting of a square or cylin-. is provided with 'a tubular pro ec t on 11 40 drical brick chamber provided with a fire forming an exit opening through which the 95 .grate, an inlet, and an exit flue, for the concentrated acid can ow out of the conburnin of fuel and the escape of the rodcentrator and into a common water cooler ucts o combustion."This may be 0 any ,12, which may be of any suitable construcsuitable 'construction kn'own to those skilled tion known to those skilled in the art. Said in the art. I outer concentric chamber or vessel hasapar- 100 Mounted on suchfire aceis a large pri-, t'ition 13 (Fig. 2) located between the tubumary boiling 0t 5 whic li is open at the top lar openings 10 and 11, so as to cause all and preferaol y made of Yeast iron. Said the acid passing into the same to travel over ot has an annular flange 5 nearits mid- ,the entire concentric bottom 5, as indicated lieight which is ada ted .to rest atitsouter by the'arrows in Fig.2, before passing out 105 edge u onthe top 0 the wall 4 so as to supthrough said exit open ng 11 to the cooler.

port t e pot 5 centrally over the fireand. The 'tubular extension 10 has a reduced have the inner portion of said flange ex detachable part lflf to which is attached an osed to the heat from below, as well as the' angular extension of a vertical tube 14 bottom and sides of said pot. The periphery 119 working a valve 14 when it is desired to draw off acid from the pot 5. By removing the reduced part 10 at its junction with the part 10 the vertical tube 14 may be removed and a scraper or swab may be inserted for cleaning the bottom of said pot 5.

The part 7 of the cover is provided with a tubular opening "I for the purpose of ascertainin the acid level at any time in the pot 5 and or draft gage connections. The tile cover over the to of the filled part 8 is provided with openings 8 through which, by means of tubular connections with a source of supply (not shown), weak acid is introduced into said filled part 8 and trickles down through the mass of the filling and falls into the rimary boiling pot 5 over which the said filled art is located. The tile cover at the top 0 the filled art has a large central opening 8 through w ich the uncondensed vapors rising from the acid may escape. The parts 7 and 8 of the cover are provided with perforated ribs or ears 7 adapted to engage hooks to be applied in the perforations for lifting the said parts off of the boilers.

In operation the heat from the boiling acid rises throu h the interstitial filling of the part 8 and t e fumes carried up thereby which contain vapors of acid are partially condensed and the acid so condensed falls back into the central or rimary boiler with the incoming acid, whic is fed in through said filling. The boiling in the primary boiler increases the strength of the acid as it descendsin said boiler, so that the acid rising to the concentric outer vessel or secondary boiler through the vertical tube 10 is of the acid most concentrated in the central or primary boiling vessel, and is spread in a thin layer and caused to travel over the entire bottom of the outer or secondary boilng vessel wherein the greatest concentration s efiected immediately preceding the cooling of the acid. The degree of concentration may be varied in accordance with the speed at which the weaker acid is fed to the central primary boiler, and therefore the regulation of the feed may be the means for attaining the desired acid strength.

The strongest acid possible by evaporat on viz: 98.20% H SO has been made continuously by our above described concentrator.

Having fully described our invention, what weclaim and desire to secure by Letters Patent is:

1. In an apparatus of the class described, the combination with a fireplace of a central vessel having an opening at its bottom, a concentric outer vessel havin an exit openmg at its bottom said bottomlming arranged at a higher level than said 0 enmg of the central vessel, a vertical tubu ar connection of said outer vessel with said opening of eeojroa said central vessel, a partition in said outer concentric vessel located between said tubular connection and said exit opening, and a perforated cover for said vessels, as speci- 2. In an apparatusof the class described, the combination with a central vessel having an opening at its bottom communicating with a vertical tube, of a concentric outer vessel communicating at its bottom with the upper end of said vertical tube and having an exit opening near its bottom, means for causing the acid treated to pass over the entire bottom of saidouter vessel before reaching said exit openin and a cover ada ted to support an interstitial filling over sai' central vessel, as specified.

3. In an a paratus of the class described, the combinatlon with a central vessel having a tubular horizontal extension 10 of a detachable tubular part 10" and a vertical tube 141: provided with a valve and rod for operating the valve, as specified.

4. In an apparatus of the class described, the combination with a fire-place of a boiling pot 5 having an opening at its bottom communicating with a vertical tube 10 a concentric flan e 5 at about its mid-height and perforate b said tube; a concentric flange 6 having tu ular perforations 11, and a perforated cover having parts 7 and 8, as and for the purpose specified.

5. In an apparatus of the class described, the combination with a fire-place of a cast metal boiling ot 5 having an opening 10 and vertical tu e 10, a flange 5 and run 6 adapted to form an outer concentric boiling,

vessel havin its bottom rforated by sai tube 10 an its rim per orated at the bottom by a tubular exit opening, a perforated cover having parts 7 and 8, the latter being filled, and the interior acid tile lining 9 of said arts, as specified.

6. an apparatus of the class described, the combination with a primary boiling pot of a secondary boiling pot having its bottom located at a higher level than the bottom of said primary boilin pot and a tubular connection with said rimary boiling pot below the level of the ottom of said secondary boiling 0t and extended upwardly to the bottom of said secondary boi ing pot and. perforating the same to cause liquid acid rising in said primary boiling pot to a higher level than the bottom of said secondary boilin pot to overflow upon said bottom, as an for the purpose specified.

7. In an apparatus of the class described, the combination with a fire-place of a rimary boiling pot and a secondary boi in pot, the latter havin its bottom arrange above the level of the ottom of said primary boiling pot, a tubular connection having one end terminating in a perforation of the bottom of said secondary boiling pot and the other end in communication with said ing pot, as and for the purpose specified.

8. In an apparatus of the class described,

the combination with a fire-place of a primary boiling pot and a secondary boiling pot having their bottom parts arranged at different levels, a tubular connection perforating the bottom of said secondary boiling pot, communicating with said primary boiling pot near its bottom and adapted to cause an overflow or? acid rising in said primary boiling pot to a point above the level of the bottom of said secondary boiling pot, and a perforated cover for sand primary and secondary boiling pots provided with an interstitial filling arranged over said primary boiling pot, as and for the purpose specified.

k OTTO PROELSS.

WALTER S. HALL). Witnesses:

F. W. Errs,

J. E. Grmornnns.

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