US1638697A - Evaporator - Google Patents

Description

Aug. 9, 1927. I 1,638,697

I. MERLIS I EVAPORATOR Filed July 17. 1.926

Patented Aug. 9, 1927 warren midst? IRA raps-ms, on NEW roan, iv.

NEW YORK, N. Y., A CORPORATION OF DELAWARE.

EVAFORATOR.

Application filed July 17,

The present invention relates to improve men-ts in evaporators and has relation to my similarly entitled ce-pending application, Serial No. 106,922, 'filed May 5, 1926, the

i apparatus in the present application being developed for evaporators of small size in which it is advisable to use onlya single steam or vapor inlet.

An Object of the present invention is to provide a calandria or steam belt for an evaporator, in which by virtueof the arrangement and disposition of the tubes, a direct and unobstructed path is provided for the vapor or steam. 1 p

The invention also contemplates the novel disposition of baffle plates by which the incondensible gases are trapped at a number of strategically located points.

A further object of the invention is to so construct, arrange and dispose the calandria tubes, baflie plates, drains and incondensible gas outlet pipes as to secure a sufficient quantity of steam or vapor .for every portion of the calandria, thus obtaining the mostetlicient results. 1

With the foregoing and other objects in view, the invention will be more fully described hereinafter, and will be more'pan ticularly pointed out in the claims app-ended hereto.

In the drawings, wherein like symbols refer to like or corresponding parts throughout the several views.

Figure 1 is a fragmentary vertical section taken through an evaporator and through the calandria or heat'belt thereof, and

Figure 2 is a horizontal section taken on the line 22 in Figure 1. I 5

Referring more particularly to the drawings, 3 designates generally the evaporator having a bottom 1; and and 6 designate the upper and lower tube sheets respectively, the tubes themselves being indicated at 7.

In accordance with the invention only one steam or vapor inletport 8 is provided, this through the port 8 1926. Serial No. 123,191.

is also made through the tubes substantially in alignment with the axis of the entrance port or opening 8, the width of this central passage being proportioned to the diameter of the opening 8 in order to maintain the velocity ofthe steam uniform. The tubes near opening 8 are disposed on an inclination toward the mouth of the passage, 'ivh'ereby the steam is deflected toward the passage. A certain amount of this steam will be diverted and conducted around in opposite.

directions along the inside wall of the shell 10. Steam will also enter through the various pipes at the sides of the passage 11.

I The passage 11 is'disposed radially and in line with a second radial passage 12, which extends to the down-take 18. This passage 12 is of less width than the passage 11 in order to keep the velocity of the steam uniform. The projecting tube portions at the entrance to passage 11, divertthe steam or vapor into the lateral channels 1 1 and 1 5, which extend angularly out from opposite sides of the innermost portion of the wider passage 11. The steam or vapor will be carried by these lateral passages to all portions of the tube spaces at opposite sides of the belt and the narrowing of the passage 12 will divert the proper proportional share I I of the steam into these lateral passages 14:

and 15. V

The above arrangement of steam passages will conduct the steam to all parts of the calandria. This arrangement is symmetrical and forms separate and opposite streams which will be, diverted by the shell 10 and the tubes to opposite sides of the baffle plate 16, which is secured to the upper and lower sheets and to the wall 10. at a pointdiametrically opposite the inlet port 8. This baffle plate 16 extends radially, but is spaced from the down-take '13, and it co-operates with thelateral balileplates 17 and 18, the major portions of which are parallel with the battle plate 16 and spaced laterally therefrom, while the innerportions of the lateral loalfle )la'tes are dia onal and extend to the down take 13. ,The perforated take- off pipes 19 and 20 for the incondensible gases are disposed within the lateral baffles 17 and 18 closeto the down-take 13, but other perforated take- 0d pipes 21 and 22, likewise for the incondensible gases, are locatedat opposite sides of the central baffle plate 16 near "'50' l 2.,,A.calandria belt-for evaporators com- IPI'lSlIiLg a shell having a single 1nductance the outer shell vof the heat belt; it being found that these. are strategic points 111' i which the gases collect.

The,arrangement of'the baflles is such as to fori'n' traps where the incondensible gases naturally accumulate and the purpose f the perforated take-oil pipes is to prov de for the rapid withdrawal of the gases at such points, preventing the spreading ofthe same amon" Beneath the pipes 19' and 20 are provided drains 23 an'dQt and other drains are shown Vat25an'd26, suchdrains being-"located ad jacent' tothe down-take'l3' and at opposite sides of. the innermost portionof the narrow radial passage 12. 1 These drains provldefor the-drawing off of the condensate.

It will be appreciated :that the steam or vapor introduced through a single inlet will berapidly and. evenly distributed througlr out theentireheat belt and anadequate sup,- 1 eply of steanriwill ,thusbe received. in every part of the calandria. I {It is obvious that'ichanges scribed embodiment :ofthis invention with out-departing from the splrit thereof, such .ehangesand modifications being restr cted only by the. scope ofthe following claims What is claim'edis-:-,

1. 'A,ca landria belt for evaporators comprising a shell having an inductance port for the heating med1um,a tubebody lnsald belt havinga radial passageextending sub-' stantially inalinement with said port and consisting of a comparatively wide outer a portion and a narrower inner portion where .;by, the tubes bordering upon the outerportion'ofthe narrower partof the passage pro- ;jectlin'the path'ot the heating medium enter- 7 r ing through theouter wider portion of the i -passageitol deflectsuch heating medium I laterally, said tube body having angularly I disposedlateral channels leading "from the innermost-portion of the wider portionot' said passage in-position to catch that ,tionof the heating medium deflected by said bordering tubes;

por-

' -po'rt j for the heating medium, a central {the shell,and ajlateral baffleplate extending a from the-down -take in laterally spaced and allel relationito th first, mentioned baffle -;plate. v v v v g the tubes'and interfering with. w the, proper heat transmission.

V modifica' itlOIl S maybe made-in the detailsof construc- .tion and design of. theabove specifically dethe down-take in spaced lateral baflle plates.

3. A calandria belt for evaporators comprising a shell having a single induction port for the heating medium, a central down-take, a tube body in said shellv having a substantially-radial passage from the port to the down-take and havingalso latferal-channels leading from said passage for distributingthe heating'medium in oppoother side of said belt diametrically opposite the port and extending radially inwardly from the shell, a lateral baffle plate extending fromythe down-take in spaced and parallel relation to the first mentioned. battle plate,-jand meansfor drawing off the incondensible gases located at opposite sides ,sitely flowing streams, a baflle plate at the of the first mentioned baflle near the ;shell.. 7

4. A calandria belt forevaporators comprising a shell having a, single induction port for the heating medium, a central.

down-take,a tube body in said shellhaving a substantiallyfradial passage from the port to the down-take and..l1aving also. lateral channels leading from said passage for distributing the heating medium in oppositely flowing streams,-a' baflle plate at] the other side'of said belt diametrically opposite the port and extending radiallyinwardly from the shell, lateral battle plates extending from the down-take inspacedyand parallel' relatio'n to thefirst'mentionedbaflle plate, and at opposite sidesfthereo'f, and means for drawing off the incondensible gases'between i said lateral bafHe plates,jadjacent the downtake.

- 5. Acalandria belt for: evaporators comprising a shell having a singlejinduction port for the heating medium, a central down-take, a tube body, in .said shell having a substantially radial passage from the port 2;

to the down-take and having also'lateral channels leading-from said passage for vdistrlbuting the heating medium in oppositely flowing streams, a bafile plate at (theother 'sideof said belt diametrically opposite-the port'and extending radially inwardly' from the shell, lateral baflle plates extending-from and para'l-lel rela- .tion to the first mentioned baflle-plate one of saidlateral ba'flle plates being tooneside of theflfirst mentioned, bafile plate and the other lateral-batfie plate beingspaced to the opposite side of said first mentioned battle pockets j with "the down-take for receivingthe oppositelyvflowplate whereby to form ing'streains and leadingsame together between said lateral baffle plates,.saiol belt hav-- ing drains'located adjacent the down-take, certain, of said i drains i prising a shell j having port for the heatingmedium, a central down-take, a tube body in 'saidshjell, abalfie plate extending radially" fromv the jfshell into being between the v V 16({A cal'andria belt for evaporators c'oma singleinducti'on said tube body substantially diametricallly opposite said induction port, and lateral baflle plates extending from thedown-take through the tube body outwardly toward the shell, said lateral baifie plates being parallel to i said first mentioned bafile plate and spaced from the latter, one of said lateral baffle plates being to one side of the first mentioned bafile plate and the other lateral first mentionedbaflle plate whereby to form. pockets, with the down-take for 'receiving'opa baffle plate being to the oppositeside of said positely' flowing streams of the heating medium deflected to such pockets by the first mentioned radial baflle plate;

r I IRA MERLIS

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