US1622918A - Evaporator - Google Patents

Description

March 29, 1921. l 1,622918 l. MERLIS EVAPORATOR Filed May 5, 192e i il l?" l 1 1| u :N

10 j ATTORNEYS,

Patented Mar. 29; 1927.

UNITED STATES PATENT OFFICE.

RA MER/LIS, F NEW YORK, N. Y., ASSIGNOR TO KELVIN ENGINEERING CO., INC., 0F NEW YORK, N. Y., A CORPORATION OF DELAWARE.

EVAPORATOR.

Application 1ed May 5,

The present invention relates to improvements in evaporators and more particularly to the `Calandria or heat belt thereoi.

The invention has for an object to provide an improved baille arrangement in the steam belt which will cause the steam or vapor to follow a prescribed path which is direct and most ei'licient.

A further object ot the invention resides in' providing an improved construct-ion ol Calandria lin which the incondensable gases are trapped at numerous points where they are rapidly `drawn oil, and in which the drains are symmetrically located with ref erence to the baille Varrangement whereby to discharge the water through the shortest possible path.

A still ,further object of the invention lies in providing a simply constructed and compact Calandria in which the Calandria will be reinforced by the bottom ol' the evaporator. j

With the foregoing and other objects in view, the invention will be described in detail hereinafter, and referred to more particularly in the sub-joined claims.`

The invention will be described inconnection with the accompanying drawings, in which like parts are referred to by the same reference characters, and in which- Figure 1 is a. vertical section taken through a portion of an eXaporator showing the improved calandria; and, j

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

VReferring more particularly to the drawings, 3 designates generally the evaporator having the bottornl; and 5 and 6 designate the tube sheetsot the calandria or steam belt. The tubes themselves. are indicated at 7. f

In accordance with the invention, the steam or vapor is introduced through the inlets or ports 8 and 9, which ports are located in the same dia-metrical line. In other words, steam or vapor isfb'rouglit into the cylindrical calandria at two diametrically opposite pointsand is circulated through the tubes in a number of paths as required by the arrangement ot the baliles. The lateral hatlie plates 10 and 1l are also located ,.oii. the .same diametric line or are aifran dialnetrically opposite one another anv Vhave their outer edges flush against the shell 12 of the 1926. Serial No. 106,922.

heat belt, the upper and lower edges being fitted against the respective t'ube sheets 5 and 6. The inner edges of the baille plates 10 and4 1l terminate short of one another ant of the down-take 13 to enable the steam and vapor to have tree passage at opposite sides of the down-take. The diametric linejoining the lateral baille plates 10 and 11 is at 900 to the diametric line joining 'the inlet ports 8 and 9. n

j In addition to the lateral bellies, there are also provided diagonal ballles made up of the oompanion angularly arranged plates 14,

15 a` nd 16, 17. These intermediate or diagonal baliles, like the llateral battles, are of the same heightV as the Calandriay and fitted at their upper land lower edges-against thetube sheets 5 and 6 to which they may be attached pas by bolting, riveting, brazing or the like. They adjacent ends of the intermediate or diagonal baille plates 14: and 15 are llanged and secured together as indicated at 18 and the ballles 'are 'closed at this point, this connection lying in the diametric line connecting.

the vaxes of the steam inlet ports 8 and 9, whereby the steam blowing in through the inlet port will meet the flanges 18 and be divided thereby and deflected to opposite sides of the flanges and against the two diagonally disposed baille plates. The flanges 18 may be secured together in any desired manner. The diagonal plates 14 and 15 converge toward the` steam inlet 8 and attheir inner sides form an obtuse angular'corner in which is placed the perforated vent pipe 19. This perforated pipe, as shown in Fig. 1, extends up through the top tube sheet 5 and is coupled toa pipe 20 for carrying ott the incondensable vapors.

In asimilar way the opposite companion diagonal baille plates 16 and 17 are arranged at the same obtuse angle and within this angle isarranged a similar perforated pipe 21 passing up through the upper tube sheet andconnected'either to the same pipe 20 or 'to a separate pipe.

27 and similar drains o and 29 are provided beneath the opposite diagonal baffle plates 1G and 17, these drains being of sufficiently large diameter to extend on both sides of the baffle plates. there the lbaille plates are provided with flanges for fitting against the upper and lower tube sheets, such flanges are removed or cut awa-y at the drains. These drain pipes, as Shown in Fig. 1, extend down from the bottom tube sheet 6 through the bottom t of the evaporator. Gaskets 30 of Monel metal, preferably corrugated, are used at the joints where the drain pipes pass through the evaporator bottom fl and join with the bottom tube sheet 6 of the Calandria. These gaskets will take up the st ains due to expansion and contraction of the different metals, as the Calandria plates and tubes are of copper and the bottom etof cast iron.

The steam entering the inlet port 8 will encounter the V-shaped plates 14 and 15 and be divided into the two streams; one stream being diverted in one circumferential section between the baffle plate 1-1 and calandria shell while the other stream proceeds in the opposite circumferential direction between the baffle plate 15 and shell. These two streams proceed until they encounter the lateral ' baffle plates 10 and 11 which project directlyT across their paths. These lateral baffle plates are also spaced from the free ends of the diagonal bale plates and the streams 0f vapor or steam are caused to be deflected by the lateral baflie plates into the f V-shaped spaces set off by the diagonal baffle plates. The steam coming in the opposite inlet port 9 divides in a similar way and so that the steam is distributed around the tubes in a short and direct path.

The location of the collectors or perforated vent pipes for the incondensable gases such that the gases developed during the .first part of the travel of the apor are removed at the points 22, 23 and 241,25. The remainder of th-e incondensable gases developed are completely eliminated at the points 19 and 21. This arrangement of the vent pipes is very important when taken in connection with the baffle arrangement as it enables the gases to be removed'as they are developed along the path of the vapor. It will be noted that the outlets 22, 23, 24, 25, are located at pockets where the incondensable gases will naturally accumulate on aecount of the location of the lateral baffles 10 and 11 and the path of the vapor as it turns around the diagonal baffles.

The final gases are chased toward the outlets 19 and 21, which are located at the junction of the diagonal bafiies, where the final gases will naturally collect and will be completely removed.

The location of the various drains is symmetrically and equi-distant from the center and from the various points where the @seams various vapors are apt to collect, thus dis'- charging the water through the shortest pos sible path.

The symmetrical disposition of the drains serves to strengthen the calandria and eliminates the necessity of using tie-rods or other strengthening devices. These collectors tie the bottom of the Calandria to the bottom of the vessel and thus serve the double purpose of draining and supporting and tying together the Calandriak and the bottom of the vessel.

It obvious that various changes and modifications may be made in the details of construction of the above specifically described embodiment of this invention without departing from the spirit thereof, such changes and modifications being restricted only by the scope of the following claims.

Having thus described the invention, what l claim and desire to secure by Letters Patent of the United States is 1. A Calandria belt for evaporators having opposite vapor inlets and including diagonal baffles having their convergent portions disposed in the path of the incoming vapor, whereby to divide it into oppositely flowing circumferential streams, and lateral baffles disposed to catch said circumferential streams and to divert the same to the opposite sides of said diagonal baffles.

2. A calandria belt for evaporators having oppositely disposed steam inlets and including diagonal baffles joined in V-shaped arrangement with the joined portions thereof presented to th-e inlets to divide the steam into two oppositely flowing streams, lateral baffles positioned to intercept the streams at opposite sides thereof from opposite inlets and to deflect the streams on the inner sides of the diagonal baffles whereby to cause the streams to follow a short and direct path through the tubes.

3. A Calandria belt for evaporators having oppositely disposed steam inlets, diagonal baffles connected angularly for intercepting the steam and dividing it into two oppositely flowing streams, lateral baffles for intercepting said streams beyond. the ends of thc diagonal ba files and for deflecting said. streams upon the opposite sides of said diagonal baffles, and vents for the incondensable gases positioned near the outer ends of said lateral baffles.

4t. A Calandria belt for evaporators having oppositely disposed steam inlets, diagonal baffles connected angularly for intercepting the steam and dividing it into two oppositely flowing streams, lateral baffles for intercepting said streams beyond the ends of the diagonal baffles and for deflecting lsaid streams upon the opposite sides of said diagonal battles, and vents for the incondensable gases located at the inner angular meeting points of said diagonal baffle plates.

5. A oalandiia belt for evapoiatoi's liavstreams upon the opposite sides of said diaging oppositely disposed steam inlets, diagonal bales, Vents for the incondensable onal ba'les connected angulaily for inter gases located in the corner portions between 10 eepting the steain'and dividing it into twov the lateral bafi'ies and Calandria shell and oppositely flowing streams lateral baiiies for in the corner portions between the meeting inteicepting said streams beyond the ends of edges of the diagonal baHes. the diagonal baiiles and for vdeflecting said 1 IRA MERLIS.

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