US1498440A - Evaporator - Google Patents

Description

H. FOTHERGILL EvAPomvroRv Fiied June 21. 1921 esmas-sheet 1 June 17, `1924. 1,49%@

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EVAPORATOR Filed June 21 w21' s sheets-Shen 2 f. 1, 5 I?, l

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. HA m? Y ICTHEE/LL Patented June l?, i924,

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HARRY FQTHERGILL, 'WESTlv/INSTER, LONDON, ENGLAND.

EVAEO B-ATOR.

Application filed 21., 1321. Serial No.. 479,252.

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Be it known that I, HARRY FOTHERGILL, of Westminster, London, in the county of London. England, have invented certain new` and useful Improvements in Evaporators, of' which the Jfollowing is a specification. c

This invention consists oi an improved evaporator, and relates particularly to the method employed for coupling the coils to a steam inlet chamber and a water drainchamber. I

It is common practice in evaporators to braze the ends of the coils to hollow coupling pieces which extend into the chambers above mentioned and are held in position by external nuts. Such an arrangement, however, necessitates the withdrawal ot the couplingpieces Ytrom the chambers whenever it is desired to remove a coil, and this necessitates either a large or special termation ot the evaporator body, or such a disposition ot the steam inlet and drainage chambers as is not always convenient. It is also common practice to use a coupling union. which is screwed into the interior wall of ,the steam space and drainage chambers, but with such an arrangement it tre quentlv happens that when uncoupling the coil from the union, the union is `unintentionally unscrewed or loosened in the wall ot the evaporator.

Ahe present invention consists of a particular construction andV arrangement of evaporator as hereinafter described, and the invention also involves an improved coupling piece which is designed for simplicity ot construction and ease oi manipulation.

An evaporator constructed in accordance with my invention comprises a hollow shell having at it`s trontan 'opening iitted with a vertical door, and on each side oit the open ing is arranged a chamber in the form of a vertical passage. One oit' these chambers Forms a steam' space for the inlet into the coils, while the other chamber forms a space for the collection of the water drainage. The coils are connected to the chambers by removably secured fitments.

ln order that the invention may be clearly understood and readily carried into practice the same will now be more fully described with reference to the accompanying drawings in which Fig. 1 is an elevation partly in section showing an evaporator constructed in ac cbrdancecwith the invention the door being removed to show the coils in position. This figure also shows the form of coupling piece.

Fig. 2 is a sectional plan through the shell showing one form of baille.

Fig. 3 is an enlarged sectional through the .shell and door.

Fig. 4 is an enlarged sectional detail of one ot the coupling pieces.

Fig. 5 is an elevation similar to Fig. l of an evaporator having a separate steam dome and modified form of battle, the coils being removed. Y l

Fig. ,Gis a sectional elevation taken as on the line 6-6 of Fig. 5*, the steam dome being omitted.l

Referring to the drawings the numeral 1 represents the shell of the evaporator, 2 the door, 3 the steam inlet chamber, 4 the water drainage chamber and 5 the steam coils.

The coi-ls 5, which may be oi' the single or double type, are arranged in horizontal planes with one end connected to the steam inlet chamber 3. and the other end connected to the water drainage chamber 4 by couplings of the kind hereinbefore referred to in general. The lower portion of the steam inlet chamber 3 may be separated by a parlition 3a, and the lower coil in the evaporator so arranged that the hot drainage water 'from the drainage chamber passes through it into the lower and separate portion of the steam chamber from which the drainage water is discharged through the cock 3b. By this means a portion of the heat in the drainage water ycan be beneficially used for heating the water in the base oir-the evaporator. Y

in the arrangement shown in Figs, l to 4 each coupling piece consists of a hollowl iitment of substantiallyv T torni, each of the ends 5a of the coil being brazed or otherwise connected with the leg 6a ofthe 'l' titments 6 which titments and the coil to which they are attached are removably secured in position by means oft a bolt 7 passing through the steam inlet chamber 3 and drainage chamber a respectivelyand the cross piece 6b of the appropriate 'l' litment, a nut 8 screwing on to the end oiE the bolt 7 this nut in the example shown being located within`the evaporator shell. The coupling bolts 7 may be made of non-corrosive material and may, if desired, be reversed from the position shown in the drawings so that the nuts S are on the outside ofthe evaporator shell.

x plan sa v Lees leo Thus, to remove a coil, it is only neeessarv Y to remove the evaporator door 2 in the usual Way, a crane bar 9 being provided for this purpose, unsoreiv 'he nuts 8 and Witl'idfanv the bolts 7 when the coil 5 as a Whole is tree to be removed. ln the oase of evaporators of small size a simple bame plate 10 located in the upper portion of the shell and retained in position by support-ing lugs 11 servesto prevent any Water being carried away with the steam;7

The joints between the coupling piece ant the steam or drainage chamber and the bi l"Y and nut are niade With Washers of suitabl material suoli as a combination of copper and asbestos, recesses 12a being provided in the Walls ot the steam, or drainage chamber to receive suoh Washers.

Referring to Fig', 5 the upper portion lEl of'the shell or a separateportion attached thereto, forms a doine or steam space for the steam generated by the evaporator. he stean'i which Venters this ydome or steam space preterably passing through a suitable bar -e 14e Which prevents Water being carried away by the steam; as shown in this figure the baille 1li is carried by supports bolted or otherwise secured to the baille base 16 locat-l ed Within the evaporator shell or dome l. The arrangement is such that any nfater which may be carried through the battle is collected and drained through a pipe, or a passage 17 (Fig. 6) in the shell of the evaporator, and delivered to the base.

The evaporators are provided With the usual external inountings and means for supporting the coils. rEhe eoil supports oonsist of bars 18 riveted into supportingv plates lf) bolted or otherwise secured to the shell.

rlfhe steam is introduced into the steam inlet chamber 3 through a screw litt valve and it Will be understood that it passes into the respective coils through the openines 13 and hence into thev drainage chamber through the openings 3a, the water beine drained otlE` or discharged b3' means of thel cock 3" at the bottom of the evaporator'.

Vvlhat l claim and desire to secure b v Letters Patent isz 1. frieflfaporator comprising shell l i an opening, ve; olo o aening, a steam inle connected at one end to the steam inlet ber and at the other end to the A age chamber, coupling pieces for effect'. the Connection of said coils, said couplii pieces each comprising` a holler: tinent oi substaitialrjvv 5J-torni to the sii. which one end ot the coil penisi l l volts aeapted to be p; inlet and `VWater drei g "lu-shaped litinent, and

sei-1L boltu 2. fin evaporator comprising` holitm4 steam inlet eliainber, a crater drains each connected at one end shell, a age chamber, coils to the steam inlet cliainben end to the Water chan ln evaporator-s, a shell, steam inlel'V ai water drainage chambers in the vial said shell, removable coil, havir 'i l subftantiall)v Lvlshaped litinents whose gie legs are perinanenthy secured to the c ends, said litments being` adairted to so cured in position b3' bolts passing throngV the cross pieces of said hollow itinents an i through the steam inlet and Water drain s spaces oil' the evaporator, substantially specified. i

Sn 'iiestiinong` whereof, l my signature.

HARRY FOTl-iERGlLL.

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