US1518785A

US1518785A - Heat exchanger

Info

Publication number: US1518785A
Application number: US523548A
Authority: US
Inventors: George H Gibson
Original assignee: Cochrane Corp
Current assignee: Cochrane Corp
Priority date: 1921-04-13
Filing date: 1921-12-19
Publication date: 1924-12-09
Anticipated expiration: 1941-12-09

Description

Dec. 9, 1924.

G. H. GIBSON HEAT EXCHANGER Original Filed April NaT Llqu/p,

15. abstracting ployed.-

4 shown in Patented Dec. 9, 1924.4

UNITED STAT-Es PATENT oFFlcE.

GEORGE H. GIEsoN, E MoN'rcLAIE, NEW JERSEY, AssIGNoE 'Io cocHEANEv con- PoEATIoN, or PHILADELPHIA, PENNSYLVANIA; .aA coEPoEA'rIoN or PENNSYL- VANIA.

HEAT EXGHANGEE.

, original application med Aprilia, 1921,se'ria1No.4e1,o75. Divided and this applicati@ med December To au whom a my comm Be it known that I, GEORGE H. GIBsoN,

-a citizen of the United States, and resident of Montclair,.in the county of Essex and one temperature to liquid at a lower temperature by vaporizing a portion of the liquid at the higher temperature and thus tion "of, the liquid, and condensing the vapor thus generated by the colder liquid which thereby absorbs .the heat liberated by the condensation kof the vapor.

The various features of novelty which char'apterize my invention are pointed out withLparticularity in the claims annexe/dto and forming a part of this specication. For abetter understanding of the invention,

. however, and its 'advantages` and specific objects, attained with its use, reference `shonld'be had to the accompanying drawings in which I have illustrated a preferred embodiment of my invention and one of the uses to which it may bc put.

Of the drawings: iFig. 1 is an elevation partly in section of my improved form of heat exchanger;

and Fig. 2 isa diagrammatic'representation of a water purifying and .deaerating plant in which the heatl exchanger may be emimproved heat exchanger in the form Fig. 1 is what I may call an open heat exchanger. It comprises -a chamber A having itslower portion divided into two water receiving compartments A and A2 byv a vpartition Berwhich terminates below the top of the/:chamber so that the upper portions of the compartments A and A? are in free communication with one another over the top of the partition B.- A.3

, represents ailiquid outlet from the bottom of compartment-A', and A4 is a liquid outlet from the bottom of the compartment A2 Relatively hot liquid is introduced into the top of the compartment A' by a supply pipe C, and relatively cool liquid lis introduced heat from `the unvaporized porspray an ordinary 19, 1921.l Serial No. 523,548.

into' the top of the compartment A" by a supply pipe F.

The Aapparatus is operated so`that the pressure of the liquid in the pipe C is above the pressure in the vaporsp'ace in the heat exchanger, and is at such temperature that as it passes into'th'e-heat exchanger from the pipe C, a portion, of the liquid will be con-l and the temperature ofVV vertedv into vapor, the uncondensed portion of the liquid supplied by the pipe C will be correspondingly reduced. In -the construction shown provisions arc made for passingthe water discharged fromA the conduit C through the vapor space in the compartment A in finely divided form. For this purpose the discharge ,from the conduit C is through a head C2' and on to a set 4of trays or D, which may be like those used in water heater and over which the Water Hows infilm-like A and broken streams. y

In Fig.' 1 the supply of water to the heat exchangerv through theconduit C' is br'egulated to maintain an approximately constant water level in the compartment A, by means of a valve C in the pipe C and a baffles float" E rising and falling with the water level inthe compartment A and controlling the valve C.

To facilitate the condensation ofthe vapor generated in the. compartment A by the water introduced to the compartment A2 through the conduit F, I preferably pass I the water discharged by the conduit F through the vapor space in the compartment A2 Ain a finely divided form. For this purpose I provide, in the construction illustrated, an overflow trough F receiving the discharge from ,the conduit F- and from which the liquid supplied to it overfiows on to a set of water'spreading trays or baiii'es DA. l

To prevent the heat exchanger from becoming air bound, an air outlet A5 should be provided and when it is desired to operate, with a pressure in the vapor space of the heat exchanger lower than atmospheric the air outlet A5 should be connected to av suitable air exhauster which may be, as shown, a steam 'jet ejector G, G representing. the steam supply connection to the ejector and G2 the ejector discharge outlet.

60 when the pressure of the liquid is reduced The necessity for an air outlet is appreciably marked because lthe conditions of operation tend to liberate in the exchanger air dissolved 0r entrained in the Water passing into the exchanger. The heat exchanger shown in Fig. 1 is relatively simple and inexpensive in construction and highly eicient and is adapted for many different uses. One of these uses, illustrated by Way of example in Fig. 2, is the heating of boiler feed Water or the like, and freeing the Water from 'air or other contained gases in case, as when the Water is supplied to an economizer, it is desirable in the deaeration process to heat the Water to a temperature appreciably above that at which it is desirable to pass the heated and treated Water avvay'rom the apparatus.

In the Water deaerating and heating apparatus shown in Fig. 2, raw Water is supplied to the apparatus through the pipe F which discharges into the compartment A2 of the heat exchanger A. This Water, .and

the Water of condensation added to it in the heat exchanger passes through the outlet A4 to the inlet of a pump H from which it is passedl through the pipe H to the water inlet of the heater I Which, as Adiagrammatically shown is'in the form of anl open feed Water heater mounted above and discharging into a closed settling'tank IA. The usual Water spreading baiiies DB are provided in the heater I. Live or exhaust steam is supplied to the heater `I in theusual manner through a conduit K and vseparator I2. The supply of Water to the apparatus through the conduit F is controlled bythe valve F5 Which is actuated by a oat EA in the tank IA so as to maintain an approximately constant Water level in the tank IA. y Thel outlet G3 from the air ejector G discharges into the heater The air carried into the heater through the conduit G, and the air liberated from the Water and steam passed into the heater I through the pipes H and K respectively, escapes from the heater I into the settllng tank IA, and passes out of the latter through the air outlet yI1" which opens from the tank IA above the water level therein. To recover the vapor and l'feat carried by it passing out of the tank lIA` through lthe air outlet I1, the latter in the form shown, discharges into 4a gleaner or condenser J; The latter comprises a jacket surrounding theraW'- Water supply pipe F. Water of condensation formed in the jacket J drips through the outlet J into the Water sealed return connection I5 to the heater I, While the air entering the jacket escapes to the atmosphere through the outlet J.

In the contemplated -mode of; `operation of the apparatus shown in Fig. 2, the raw Water supplied to the heat exchanger A the atmosphere.

This temperature in ordinary practice may be something like 130 or 140. The water supplied to' the compartment A2 by the pipe F and the Water of condensation formed in the compartment A2 is passed by the pump H into the heater I Where it is heated to the desired temperature of 212 or a little above to facilitate the deaer'ation of the Water. From the tank IA the heated Water passes through the funnel I15 and the Water outlet I16 to the pipe C and thence into the compartment A of the heat exchanger. The Water passes through the pipe C into the spray head C2 at a pressure equal to or ordinarily a trifle above conversion of a portion of the water into vapor and the How of the Water over the bafiies D' facilitates the liberation of air dissolved in the Water and mechanically held in the Water supplied to the heat exchanger through the conduit C. A considerable portion Iof the air dissolved in or entrained by 'the Water supplied through the conduit F is also liberated in the heat exchanger A as a result of the heating of this Water and its flow through the vapor space of the heat exchanger in a finely divided form. The air thus liberated is withdrawn bythe ejector G, and is passed into the heater I from which as already explained, it eventually escapes through the tank IA, outlet pipe Ilo and gleaner J into j While the use of a heat exchanger in connection with a Water heater in a Water heating and deaerating plant or the like shown in Fig. 1 is' novel with me, it is not claimed herein but is claimed in my co-pending application, Serial No. 461,07 5, iled April 13, 1921, of which 4the present application is a division. It will -be apparent to those skilled in the art that changes may be made in the form of my invention Without departing from the spiritof my invention as` set forthY in the appended claims, Vand that certain features of my invention may some-l times be usedto advantage lwithout a corresponding use of other features.

Having now described my invention, what ters Patentis:

1. Means for transferringl heat from-one' liquid to f chamber,

another comprising a. single closed a partition thereindividing the lower portion of each chamberv into two separate water compartments, each in free communication at its upper'end with the upper Aend lof the other, mea/ris for passing Athe hotter'liquid into one of said compartments'at a temperaturesabove that of saturated vapor of the liquid at the vapor pres- Y sure prevailing@ said cham'ber, means for -passing the colder liidntothe-other compartment, and separate means for withdrawing water from the two compartments.

ends, a-hot liquid inlet opening t'o the' 'ip 2. A. heat exchanger comprising a closed chamber divideditrnally into two sepa-A rate Water receiving compartments in communicatio'n with one another at their npper per portion of one of said compartments, a cool liquid-inlet-openingtoftllupper portion. of the other compartment, water spreading 4devices' in the upper portion of thelast mentioned compartment for caus ing the water admitted tol that comparti ment to pass throughl the upper portion thereof in a ,finely divided cond-itionyand sepa-rate waterimtletsiromYY the/two comp'artments 3. A heat exchanger comp-rising a closed chamber divided internally into two separate Water receiving compartments 'in communication with one another attheir upper ends, a hot liquid inlet opening to the upper portion of one of said compartments, a cool liquid inlet opening to the upper portion of the other compartment, water spreading devices in the uppegportion of each compartment forcausingthe water ad mitted to each compartment to'pass through the 11p-per portion thereof in a finely ldivided condition, Yand separate Water outlets-from the two ccmpqrrtxrrerrtgV "S'igeiiii'Philadelphia, in the county7 of Philadelphia and State of Pennsylvania, this sixteentl day of December A. D. 1921.

GERGE H. GIBSON.