US1269994A - Process and apparatus for mixing dry lime with liquids. - Google Patents

Description

J. W. ADAMS 6L 0. H. EGGE. Pnocsss Aun APP/mus Fon mxms [mums wml uoums. 1,269,994.

APPLICATION rlLzorss. 2'4. |911.

` Patented June 18, 1918.

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Patented June 18, -l9l&

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2 SHEETS-SHEET 2I UNITED STATES PATENT -oEEicE TAKES WALTER ADAMS AN'D OTTO HENRY EGGE, 0F SPRECKELS, CALIFORNIA.

Specication of Letters Patent.

Patented June 18, 1918.

Application ma rebruary 24, 1917. serial No. 150,860.

To all whom it may concern:

Be it known that we, JAMES WALTER ADAMS and '1'10 HENRY ESGE, citizens of the United States, residing at Spreckels, in the county of Monterey and State of California, have invented new and useful lmprovements in Processes and Apparatus for Mixing Dry Lime with Liquids, of which the following is a specification.

This invention relates in general to processes and apparatus for applying dry powdered lime to sugar solutions and pertains particularly to an improvement in processes and apparatus for distributing lime evenly to the surface of the solutions to be treated.

The invention includes the process and means for maintaining the lime particles in a dry condition until they are actually proq` jected into the sugar solution.

One object of the invention is to distribute the lime evenly over a specified area of the surface of a body of sugar solution and to accomplish this and'provide the desired resultant mixture and avoid the common fault caused by the formation of thick lime deposits on the walls of the treatment chamber and cooler.

By the present invention we overcome the f difficulty experienced in the use of other distributers in which the fine lime settles on the foam in the cooler and treatment chambers which forms a. crust of lime eventually carried into the circulating well of the apparatus used. The crust is commonly found not in a finely divided state but in lumps and as such does not re-act with the sugar but hydrates or slacks when mixed with a solution thus producing heat which is un- V desirable and rendering the lime inactive and useless.

Further the present invention renders 1t diff-cult for the lime to collect on the sides of cooler wall or on the sides of the walls of the treatment chamber. Heretofore this collection of lime has fallen olf in chunks and dropping into the solution has raised the temperature of the solution as above noted or lodged in lumps in the circulating tube, plugging these tubes and often making iL necessary to cut the cooler and entire apparatus out of service so that thestructure may be opened up and cleaned. The present invention also makes it possible to apply the lime more quickly because of the high eiliciency of the same.

rll`he present invention renders possible the desirable equal distribution .of powdered lime over a specied area of the cooler solution in such a manner that a uniform quantity of lime is constantly coming in contact with a uniform and proportionate amount of sugar solution. The present invention renders this function in the most efficient manner by conveying the lime to the solution in the shortest possible time after it leaves the feeding device and enters the treatment chamber and also by preventing the lime from coming into contact with the moist air in the treatment chamber previous to the projection of the lime into the liquid.

Other features of the invention and details of operation will be set forth in the following specilication and claims and illustrated in the accompanying drawings in which- Figure 1 represents a view of the outside of a machine embodying the features of the invention.

Fig. 2 represents a side view of the structure shown in Fig. 1 and illustrates in section the construction of the lime distributing device within the treatment chamber.

Referring in detail to the drawings 1 indicates the cylindrical wall of the main treatment chamber inclosing the lime distributing device in the upper portion and the cooling apparatus in the lower portion. The cooler pipes or tubes are indicated by v2 and the space surrounding these pipes for the body of the cooling solution is indicated by 3. ln the lower half of the chamber 1 and arranged around the inside of the chamber are the cooling pipes 2 providing a central well lvvhich is substantially cylmdrical in shape. A cover plate extends across the top of the well 4l and is provided with open ings therethrough 5a. The inlet and outlet for the sugar solution are indicated by 5" and 5 respectively. v'llhe solution is supplied to the casing until the level is reached as indicated by X opplosite the sight glass l", and circulation of t e solution is effected by the propeller wheel 6 located at the bottoml of the wellll. The operation of the wheel 6 forces the material at the bottom of the casing 1 upwardly through the cooling pipes 2 into the lower part of the upper casing, *Here the solution flows ,Centrally over the cover 'plate 5 and is drawn downwardly by gravity and the action of the propeller wheel 6. Extending downwardly from the upper end of the casing 1 and situated substantially centrally thereof is the metal casing or housing 7 -for conveying the particles of lime 'which are to be distributed. The lowerinost end of the casing 7 is somewhat enlarged and extends` slightly beneath the upper surface of the material of the ff sugar solution. Located immediately above the surface of the solution and in the lower end of the casing 7 is the 'distributing and propelling fan member 8 the function of which is to evenly divide the dry lime parti# cles and to project the same downwardly and into the sugar solution immediately below the member 8 -and within. the contines of the end of the casing 7. Suitable actuating power is supplied by means of a shaft 9' which is supported at its lowermost end by bearing 9E1 secured to the casing 1 by means of the brace 9. The lime is conveyed to the casing ,7 :trom a distributing scroll 10 to which the lime is conveyed by connection 11 having a flexible joint -10a with the scroll l0, from a hopper and weighing scales 12.

Located in the upper half of the chamber 1 y ot' the casing 7, When the distributor 8 andv the propeller wheel 6 are moved the nely divi ed dry particles of lime are projected onto the surface of the sugar solution within the casing 7. During .this movement the sugar solution has a constant iowing movement toward the center` of the casing 7 to a.

point beneath the casing 7 and from this position downwardly through the openings 5E. \The dry lime particles are effectively prevented from comin into contact with lthe ot moist air within t e chamber 1 and outside of 'the casing 7 by the action of the sugar solution covering the lowermost end of the casing 7 and substantially providing an air seal at that point. The member 8 is constructed in such a manner that when' it rotates, it throws the lime downwardly and at the same time spreads it uniformly over the solution directly under the housing or imc casing 7. The invention prevents the particles from being thrown against or otherwise coming into contact with the inner walls of the chamber 1 before being thorinceste oughly co-mingled with the sugar solution. The lime has no opportunity to sialic before being projected into the solution because of the operation of the air seal at the bottom of the casing.

From the foregoing it will be clear that the amount of lime necessary for the treating of a given portion of-sugar solution is reduced to a minimum because'of the ellicient distribution of the lime over the surface of the solution treated. This eliioient operation makes possible the increased oapacity of the4 apparatus as a whole and the resultant treatment of a larger daily amount of solution.

The process and apparatus described herein may be applied to the mixing of .any dry particles orsubstances to any solutions or liquid and is not limited to the combination of powdered lime to sugar solution.

RWhat we claim is 1. The process of applying a hygroscopic 'powder in a dry state to a duid which comprises the mechanical distribution of a dry powdered material evenly over a substantially smooth horizontal part or the surface ot the Afluid to be treated without contact by the powdered material with the damp air in contact with the remainder of the surface of the duid.

2. The process of applying dry powdered lime to sugar solutions which consists in spreading and forcibly progecting the-dry powdered lime evenly on a substantially smooth horizontal part of the surface of the duid to be treated without contact by the dry powdered lime with the damp air in contact with the remainder out the surface ot the fluid. 1

3. The process of applying dry powdered lime to sugar solutions which consistsin forcibly projecting and evenly distributing dry lime particles over a specc and substantially smooth horizontal area on the surface of a portion of the soliition to be treated 'and maintaining the said specific area hermetically separate :tromthe surface of 4theL remainder of fthe soluzion.

v. n a aratus or ap ying pow material li) dry state to ailuid which comprises a main treatment chamber ,adapted to contain a duid to be treated, a series of cooling tubes in the lower portion of said chamber providing a central well, a rorate cover plate over the upper en of said well, circulating means for forcing the liquid upwardly through said cooling 'tubes from which it is adapted to dow over and downwardly through said perforate cover plate, a downwardly projecting distributing casing over said cover plate, and a distributing device within said casing adalpted to project particles of material even y over the :fluid over said cover plate.

5. An apparatus for applying hygrosccpic powdered material in a dry state to a uid which comprises a main chamber adapted to contain a fluid to be treated, a downwardly projecting distributin casing adapted to extend into the fluid win said chamber and within which the fluid tends to rise to the level of that in said chamber, and a distributing device within said casing for evenly distributing the particles of powdered'material over the surface of the fluid within said distributing casin 6; An apparatus for appying hygroscopic powdered material in a dry state to a iuid which comprises a main chamber adapted to contain a fluid to be-vtreated', a downwardly projecting distributin casin adapted to extend into the fluid wit in sai chamber and within which the fluid tends to rise to the level of that in said chamber, and a distributing device within said casing for evenly distributin .the particles of powdered material over t e surface of 4thefiuid within said distributing casing, comprising a rotary propeller fan member mounted to rotate on a vertical axis immediately above the level of the liquid.

7 An apparatus for applying hygroscopic powdered material in a dry state to a fluid which comprises a-main treatment chamber adapted to contain a fluid to be treated7 a downwardly projecting distributing casin adapted to extend into the fluid within said chamber whereby the fluid hermetically closes the lower end of said casing and prevents atmospheric communication between the interior of said chamber and the interior of said casing, and a disterial over the level surface o the fluid, the

fluid within said chamber having a central flowing movement to a point beneath said distributing casing and downwardly therefrom.

9. An apparatus for ap lying hygroscopic powdered material in a ry state to a fluid which com rises a main chamber adapted to contain a uid to be treated a downwardly projecting distributing casmg ada ted to extend into the uid within said c amber, and a distributing device within said ca and adjacent the surface of the fluid forevenly projecting dry dparticles of powdered material into said lui comprising a rotary propeller member mounted to rotate on a vertical axis, the liuid within said chamber having a central flowing movement toward a point, beneath said distributing casing and downwardly therefrom.

In testimony whereof we ax our signa.-

tures.

JAMES WALTER ADAMS. OTTO HENRY

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