US909028A - Evaporator. - Google Patents

Description

c. L. SGEALITZ.

EVAIORATOR. APPLICATION, FILED In a, 1908.

Patented'Jan. 5, 1909.

WITNESSES ATTORNEY UNITED cant L.;-:SGH-ALITZ, or SAN rRA cIscd-cAuroaNIA.

' EVAPORATOB.

Specifioationof Letters Patent.

Patented Jan; 5. 1909.

Application filed. May s, 1908. Serial No. 431,689.

To all whom "it may concern? Be it known that I, CARL LQSOHALITZ, a citizen of the United States, residing in the city and County of San Francisco and State jecting down through the partition 2 into' of California, have invented new and useful Improvements in Evaporators, of which the following is a specification.

My invention relates toevaporatoraand especially to evaporating apparatus for use in sugar refining.

The ob 'ect of this invention is to provide.

an upright multiple-efiectevaporator, thereby economizing space and giving a maximum of heating surface; .also' to' provide means for removing the. condensed moisture from the evaporating chambers; and to provide means for maintainlnga uniform heat- .inthe evaporating chambers, and for regulating the heat consistently with the vacuum formed in the chambers. 1 -.'The' invention consists of the parts and the construction and combination of parts" as hereinafter more fully described and claimed, having reference to-the accompanying drawings, in which H Figure 1' is a vertical section of the device. Fig. 2 is a transversesection. a J A represents a casing of any suitable size, It is'preferably in the form-of an upright cylinder, and its interior.

shape or material.

is'divided ofi'ninto a series of superposed hambers by suit-able, convex partitions 2. A steam coil 3 for heating purposes 15 arranged in the bottom of the initial or lowermost chamber 4, this coil connecting with a steam pipe 5 leading from any suitable source of steam supply. The exhaust steam from coil 3 passes'out at- 6.' -E ach chamber in the evaporatoris also provided with a steam coil, or a pair'of coils; as here shown at 7; these coils having their ends 8 pro- I .the chamber below, preferably: centrally thereof. These coils. each discharge at their lower extrem ties proximate to the pe nphery of the evaporator lnto a drain plpe 9: these several drain pipes 9 leading intoterial inthe lower chamber 4, and the exhaust created through the coils 7 and their inlets S-in' the several-chambers produces a partialvacuum in each of the. chambers.

This results in causing the syrup orother liquid in the lower. chamber to boil at'a point" somewhat less than 212 Fahrenheit.

The steam rising from the boiling liquid in; chamber 4 is drawn out through the outlets 8 of the coil 7 immediately above to the exhauster. Of course, thesame suction is exerted through the several series of coils above. The material -to be evaporated is continually ted. in under suitable head through the inlet 14' and finally reaches the mouth of'the pipe-12 in-"cham-ber 4. It'is at this moment that the suction in chamber '15 immediately above begins to act'and .draws up a portion of the liquid in chamber j 4 int-o chamber 15.

This liquid spreads out over the floor of the chamber, and soon the heat from the steamrising from chamber 4 and circulating-"through the coils? sets this elevated material in chamber 15 to boiling; and the steam rising from chamber 15 is drawn out through the coil 7 in the bot.- tom of chamber 16 above, just as in the first instance. The liquid in the chamber 15 gradually accumulates until itcovers the.

mouth of the pipe 12 in that chamber,.whereupon the vacuum, created in chamber. 16 draws up the liquid into. chamber 16, and this spreads out. and is heated and boiled again in the same way. Its steam is exhausted in a similar manner, and the chambers 1718-19 above are gradually filled to the level oftheir respective pipes 12; the final evaporated product being drawnofi throughthe-outlet 20. g The condensed 1nois-' ture in the several series of coils 7 flows out through respective pipes 9 and downward through the pipe 10 toa suitable point where it is finally discharged from the exhauster, while the steam has an opportunity denser 11.

to rise'upwards through the pipe 10 and be condensed in the enlarged part of the .con-

As the mouth of each of the pipe-s12 in theseveral chambers 4-1516, etc, becomes sealed by the rising liquid in these chambers, the vacuum in the chamber above becomes correspondingly increased;

and consequently the boiling point in the chambers is correspondingly reduced; Thus, for example, there may be five inches of vacuum in chamber i and the liquid will boil at 200 Fahrenheit. In chamber 15 there will be ten inches of vacuum and the liquid will boil at 180. Fahrenheit. In

chamber 16 there might be fifteen inches of vacuum and the liquid will boil at 160 Fahrenheit;- and so on, until in chamber 19 1 there might be twenty-seven inches of vacuum andthe liquid would boil at 100 Fahrenheit;

In order to suitably regulate the admission of the steam to' the initial steam coil 3 and control the heat by the amount of vacuum, I

have shown the pipe leading tothe steam coil 3 as provided with a valve 21 which may be opened by the pressure of the steam flowing from pipe'5. This valve is provided'with a stem 22 which pivots to a lever saute latter being fulcrumed at one end to 24, and carryin a mercur cu at the o 'osite end, A

' small pipe 26, which may bejt'en or twelve inches in length, hasone end entering chamber 1 and the other end dipping mto the mercury in the cup .25. There is a suflicie'nt quantity of mercury in the cup 25 to hold the valve 21 closed until say five inches of vacuum is created in chamber 4, which will result in drawing say five, inches of mercury up into the pipe 26. This will reduce the amount of mercury in the cup 25 so as to allow the steam pressure on the under side of valve 21 to force open the valve and admit steam into. the coil 3. Thus, by increasing or decreasing the quantity of inercury in the cup 25, the amount of vacuum in the several evaporating chambers may be regulated accordingly, and the heat in the several chambers maintained uniform;

The partitions 2 are preferably made arched, as shown, so that any moist-urecondensing on the under side of these. parti tions will drain towards the periphery of the shell Aand there be caught by the an-- nular shelves or shields 27; the moisture so collected passing out through small outlets 28 into the drain pipes 9. Itis understood that these outlets 28- are not large enough to intcrferewith the proper suction and cir-. culation through the coil 7.

Evaporators built according to these specifications are in use at the present time,

. and are operating successfully. I

-Hav1ng thus described my 4 invention,

' and an outlet, a valve in the inlet, and means controlled by the vacuum in the chamber for operating said valve.

An evaporator having an evaporating chamber, a steam coil inthe chamber,

means for creating a vacuum elf t in the chamber, a valve controlling the a mission of steam to said coil, said valve having a stem, a lever to which the stem is coim ected, said lever carrying a mercury cup and weighted with" mercury normally to hold the valve closed, anda pipe entering the evaporating chamber and dipping'into the mercury in said cup.

at. An evaporator having a plurality of super osed evaporating chambers, said cham ers. divided one from the other by arched part'itions ,'a coil resting on the top of each partition and having one end. ex

tending into the chamber below and the other end connected with a suitable exhaust apparatus, an exhaust apparatus therefor,

a steam coilfor heating'the initial chamber, Said 0011 having an lnlet and an outlet, a

valve in the inlet and automatically con- "trolled by the vacuum in-the chamber, and

pipes for the flow of the liquid'to be evaporated leading from respective chamhers above and, opening-into the chambers below. 5. An evaporator having multiple evaporating' chambers arrangeclone above the other, means for simultaneously creating a vacuum efi'ect ill-"the several chambers, a

steam coil for heating'the lowermost'chamher, a valve in said inlet, and means controlled by the -vacuum-for operating the valves, and suitable connections between the chambers whereby on the production of a vacuum effect in said chambers the material to'be evaporated is lifted successively through the several chambers. .In testimony whereof I have hereunto set my .fhand in presence of two "subscribing witnesses. GARLL. 'sor-mnrrz.

Witnesses: I

CHARLES Ennmux,

C. C. Conn.

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