US1877412A - Deaerating water heater - Google Patents

Description

- Sept. 13,1932. P. s. LYofi DEAERATING WATER HEA TER Filed Oct. 20, 1 928 2 Sheets-Sheet l lfiVENTOR PfRCY 5. A VON BY W 8 1 TTORNEY 2 Sheets-Sheet 2 P.S.LYON DEAERATING WATER HEATER -%i1ed Oct. 20, 1928 iii :11? $2111: 25?" z: K5 K I E: I:-

. UNETE STATE-S Patented Sept. 13, 1932 EN i 1 rnnov srvon; or roar WAYNE, :IND'IANA, AssreNoR'ro COGHRANE' CORPORATION,

' or PHILADELPHIA, PENNSYLVANIA, A COR-BORATIONDF rnlvnsynvanrajt Danna-Arnie wanna HEATER "j Application filed. October 20, iszafiseri r no. 313,716.

j The present invention relates to'apparatus for heating and deaerating Water of the type in which raw Water previously heated in a heat exchanger to a predeterm ned. temperature is sprayed downwardly onto a bank of: trays in which the descending Water contacts with andis scrubbed by steam passing upwardly through said tray bank to liberate air and other corrosive gases contained thereln,

and the invention is devised especially for" use in deaerating apparatus of the surface heater type i. e. apparatus in which the steam used for scrubbing the Water is generated" fromthe Water being deaerated by contact with a-"heat exchanger comprising steam filled tubesinto contact'withyvhich the Water passes after leaving said tray bank.

deaera'ting apparatus of the character described the steam, not conden'sed during its 2 upward passage through the tray bankand the air and other gases liberated are passed into a'second heat exchanger or vent con" denser which may comprise one or tWo stages in which the major portion of-the' steam is condensed and from which the uncondensed gases and vapors are vented or dischargedby an ejector.

In installations heretofore made ofap paratus of the'type described the heat exchanger, vent condenser and deaerating heaterohave usually been separate pieces of apparatus and usually the vent condenser has been mounted on the top of the deaerat ing heater. Installations ofthis type occupy considerable floor space and require a con-l sidcrable amount of interconnecting piping between the various pieces of apparatus.

"Economy in floor spaceand headroom is especially desirable with deaerat'ing apparates of thetype described because that apparatus is particularly adapted for domestic service use in hotels, apartments and buildings presenting space restrictions and Where itis not desirable to permit the heating steam i to contact With the deaerated Water to be used for domestic purposes and Where it is advantageous to utilize the condensate recov-- ered from the heat exchangers oi the paratus as boiler feed inn: itwith the hot-treated Water.

Water, rather than to Such apparatus is usually installed in the. basement of the building wherein floor space and headroom are usually very limited, Deaerating heatersin present useare of sumcient' height to causegreat diiilc'ulty in -i'n-{ stalling them in basements of normal height.

In installations where the vent condenser is mounted on the top of the heater, the re quired amount'of headroom is :greatly in creased. A further disadvantage of the separate arrangement is that the'standard pumps available forpumping the Water fromthe Water storage compartment o'f the heater to a Theobject of my invention-is to provide an improved, arrangement and construction of apparatus for heatingan'd Zd'eaeratingWaterWhich is characterized by the c0ns0lida-' tion'of the preheater vent condenscr and deaerating heater in a single piece of apparatus having considerably "less over-all height and requiring less piping and-floor space than the apparatus heretofore"infuse; A further object of'my invention is to pro vide an improved form of deaerating tray.

v The various features of novelty which char acterize my invention are pointed out with particularity in the claims annexedtoand ,torminm a part of this specification." For a better understanding of 'the'invention, however, and the advantages possessed by it ref .erence should be had totheaccompanyingf drawings and descrintive matter in which I have illustrated and described a preferred embodiment of the invention. Of the drawings 2 i i 1 Fig. 1 is'a front elevation of my improved apparatus; V V a &

Fig.2'is'asideelevation; Fig. 3 is a plan view f Fig. 4 isa section on the line H of Figrl; Fig. 5 is asectionon the line 5-5 of'Fig; 1; Fig. 6 is a'section on the line 6 -6 of Fig. 2;

horizontal and vertical cross sections andincludes a water storage compartment orchamber B in the lower portion of the shell, a'

deaerating compartment C above one side of the storage compartment, a preheater compartmentD above the other side of the storage compartment and alongside the .deaerating compartment and. separated from, said compartments, and a vent condenser comzpartm'ent .E above the preheatercompartment and at one side of'and connected to the deaerating compartment. As shown the shell is composed of metallic plates A 1 shaped and connected as is usual in such rectangular shells. p 1

The vent condenser and preheater chambersor compartments are formed by partitions mounted inone of the upper corners.

of the container and secured to the front,

'a rear, a side and top wall plates of the con taine-r. The partitions comprise a vertical partitionF extending longitudinally of the heater andseparating the chamber forn'ied from the deaerating compartment. A pair -"of;vertically spaced horizontal partitions- F 'and F extend laterally from'the partition F and are integrally connected to the adjacent side wall. to-form an upper vent condenser compartment and a lower'preheater compartment. A port Fis. formed in the rear portion of the partition'F above the partition F A horizontal row of U-shaped tubes E"- are positioned in the vent condenser com J: partment with the'op'en ends of the tubes'secur d in a tube sheet Gr'closing the front end of the compartments D'and A steam ejector E is connected to the" compartment E-and serves to withdraw air and small amounts of vapor therefrom. The 'prehe'ater compartment Dis occupied by a plurality of horizontal rows of U-sh'aped tubes D,

each of said tubes having itsouter ends secured to the tube sheet G. As shown in ithe elements D and E extend longitudinally of and throughout the major portion of the corresponding compartment. Aheader H having a substantially smooth outer face and an inner faceformed with a plurality of inwardly projecting transverse ribs H is secured to and covers the tubesheet G.

The header is provided withfianged inlet and outlet openings H and H respectively.

Each :rib is arranged to contact with the tube sheet at a level betwen the'upper and lower legs of one of the rows of heating elements.

This arrangement provides a continuous closed path of flow for the water passing in at H through the tubular elements in each compartment to' the outlet opening 1-1 L drain opening D is located adjacent the bottom: of the preheater compartment and an air outlet opening D adjacent the upper end of the compartment.

The lower edge of the plate-F and the opposite wall of the container are provided with brackets J. at horizontally spaced points thereon and in which transverse members J are supported. As shown there are three of such transverse members. A plurality of stacks of trays Kare mounted'on andextend from one to the other of the transverse membersJ The front of the deaerating chamberis closed by a tray door K, through which the trays may be inserted or removed.

As shown in Figs 7 9, each of the trays K is formed with a flat body portion K" in which trans versely spaced slots K are arrange The a plurality of longitudinally extendin 7 portions of the tray body adjacent the slots K are formed with bosses K on the underside. As shown in Fig. 7 the slots are symmet-j rically arrangedrelative to alinelaterally dis-- placed from the longitudinal center line of the tray.- Each tray is provided at one end with a transverse lug K at its upper. side intermediate the ends of the slots and adj acent end ofthe tray. A flange K depends from the underside of the tray: at each side edge thereof and has a depending'portion K", which is cut awayat its outer 'end belowthe lug K to form a notch K7. The-opposite end of the tray has 7 an upper transverse lug K at its outer end and each marginal flange K is formed with a depending portion K having a notch K therein inwardly spaced from the lug K WVith each of the trays constructed" as described, the trays are necessarily stacked with alternate trays in the reverse position and the lugs K and K of each tray fitting into the notches K and K respectively, ofthe superposed tray. The slots K of each tray of the stack are thus staggered relative to the slots of the adjacent upper and lower trays without requiring more than one form of A pair ofbrass pipes M, each having one end open and'threaded in the front wall of the shell and the opposite end closed and supported by-the rear wall of the shell, are .1. mounted above the tray stacks. Each pipe is provided with amultiplicity of perforations M in its upper side. Ribs M are formed on the underside of the top wall of the shell and extend longitudinally of the deaerating compartment on each side of each of the per- I forated pipes M.

. A horizontal battle N extends transversely A of the deaerating compartment closing the space between the rear transverse member J" and the rear wall of the Compartment. A second transverse baiflle N closes the space between the upper end of thetray stacks and the front wall of the compartment for a purpose hereinafter described.

. The water storage compartment B contains an inner and outer row of U-tube elements B arranged with the legs ofeach element in the outer row parallel with and surrounding the legs of the corresponding element in theinner row. The corresponding legs of the elements in each of the rows are mounted in a tube sheet 13 covering an opening B inthe front wall of the shell. A steam chest 0 having an upper inlet chamber .0 anda loweroutlet chamber 0 covers and is secured to thetube sheet B with the upper legs of the elements B opening to the chamber 0 and the lower legs opening to the chamber 0 The upper chamber has a steam inlet opening 0 and the lower chamber is provided with a vent opening 0 and a drain opening 0 The tubular elements may be above the water level in the compartment or wholly or partially submerged. In the construction shown, the elements are substantially submerged. The elements are positioned below the center stacks of trays andextend longitudinally of the compartment to a point adjacent the rear wall. 1 V

A float P mounted on alever arm 1? pivoted in the front wall of the shell is positioned in the storage compartment at one side. of the tubular elements B and controls the amount of water sprayed onto the deaerating trays K. The water outlet H is connected by piping H to a common inletH connected to the water distributing pipes M. A regulating valve H is positioned in the piping H adjacent the outlet. The valve H is operated by a lever system H connected to the lever arm P of the'fioatvalve to increase and decrease the supply of waterasthe water level in the storage compartment decreases and increases; respectively. A water outlet pipe B is connected to the bottom of the storage compartment and leads to the inlet of a pump (not shown). A steam'inlet' pipe Q, having a thermostatlcally controlled valve Q, mountedt-herein is connected to one side ,of the preheater compartment D for passing steam into that compartment in contact with the preheater tubes. The thermostatic element controlling the op eration of the valve is located in the storage compartment below the level of the water. A branch steam pipe It extends externally of the shellfrom a point in the steam-inlet pipe Q between the valve Q and heater to the upper chamber of the steam chest.

The general operation of disclosed 'is as follows: I V

Raw water is passed into the heater through the inlet H to the tubes forming the vent i condenserandthrough which it passesdisthe apparatus. All openingsand accessories areconfined to charging into the header common to the vent,

condenser-elements and first pass ofth'e premately that of the temperature of the water leaving the heater at B before itpasses'to the deaerating compartment. The heated water passes out throughthe'valve H and piping H to the. waterdistrib extending above the tray elements. I

The water being under pressure is sprayed upwardly from the perforated distributing pipes against the topwall'of the container uting pipes M .in the preheater D to a temperature approxi I and the spray is deflected by the longitudinal ribs M? downwardly ontothe tray stacks. In normal operation the water in "the storage, compartmentais at the outlet temperature desired and the heat supplied thereto by the evaporator elements B is suflicient to convert 'a' portion of the water in the compart mentiintosteam whichpass jes upwardly through and longitudinally between the tray stacks wherein it contacts with and scrubs the water passing downwardly'therethrough.

The.scrubbing'actiontaking place o'nfthef V finely dividedwaterassists in-removing'the am. By the term air as used herein, I

mean to include'not only the constituents of atmospheric air dissolved in the water and liberated from the latter inlthe apparatus, I

and other gases lib but also carbon dioxide erated from the waterin its treatment. Any

steam 'not' condensedduring its passagev T through thetray stacks passes upwardlywith the separated air through the'portft into i i the vent condenser compartment andafter contacting with the water tubes thereini s exhausted by the steam ejector connected thereto. The deaerated water .is withdrawn from the water storage compartment as needed by a suitable pump."

r The apparatus of my invention isl cha'racterized by its simplicity, efiectiveness and low cost of manufacture and installation. Only .a small amount'of floorspace and a single foundation is required for the self-contained unit. The apparatus may be installed inloe cations having very limited headroom as the overall height of the unit is approximately four feet.

standard pumps of'lowercost can be-used.

the front; one of the side walls and bottom of the unit, whereby the unit may be installed in a corner, having limitedheadroom. v'The This feature is also advantageous m that special pumps are not required and formerly' necessary has been almost. completely eliminated, thereby improving the appearance and lowering the cost of the equip ment. .The rectangular form of shell iscon sideredv advantageous cover the "cylindrical m form and all the space therein is economically used and in all, theconstruction is unusually compact and effective.

WVhilein accordance: with the provisions of the statutes, Ihave illustrated and'described the best form of embodiment of my invention now known to me,-'it will be apparentto those skilledin the art that changes may be made in the form of the apparatus disclosed without departing from the spiritiof my invention as set forth in the appendedclaimsand that in some cases certain features of my invention maybe used toadvantage without a corre sponding use of other features. Y -Having now described my invention'what I claim as new and desire to secure by Letters Patent, is i 1.'A'self-contained water heating and de aerating unit comprising a casing having 'a deaerating space in the upper portion thereof, a trayv stack in said space, water distribut ing meansin said space above said tray stack,

a water storage compartment below and open to said deaerating space,.means for passing heating steam into said storage compartment, a plurality of water tubes in said casing-at one side of'said -deaerating space andv above said storage compartment, a closed vent condensing chamber in said casing at one side of said deaerating space, and adjacent said' water. tubes. and a'portconnecting said condensing chamber with the upper portion of said deaerating space.

2. A self-contained water heating and deaerating unit, comprisinga casing of simple and compact form hav ng a deaerating com partment in the upper portion thereof, atray I stack in said compartment,water'distribute ing means above said tray stack, a water. storage compartmentgbelow and connected to said deaerating compartment, meansfor passing heating steam into said storage com partment, a pluralityof watertubes at one side of said deaerating compartment and above said storage compartmentysaid tube space b-eing'separated fromsaid compartments by partitions, means for passing heating steam into contact with said tubes, avent condensing space at one side of said deaerating compartment and above said water tubes, a port-connecting said condensing space with the upper portion of said deaerating compartment, and means connected to said condensing space for withdraw-in'gair passing 661thereto from said deaerating compartment.

8. A self-containediwater heating and de-a aerating unit comprising a shell or casing of simple and compact form and partitions therein dividing the shell interior intosuperposed upper water preheating and vent COI 1-' densing chambers, the latter having an air outlet, 'a deaerating space alongside said chambers anda water storage spacebeneath-v the deaerating and preheating chambers, one

of said partitions being ported to permit-e the passage of air and. vapor into said con densing chamberfrom said .deaeratingspace,

asteam heated water heater for evaporating:

" a portion of the water'entering said storage space from said deaerating space, water sup} ply connections comprising tubes in the vent condensing and preheating chambers through which the water is passed in series into the upper end of the'deaerating space,

and means for supplying heating steam to said preheating chamber to heat the water passing through the tubes therein. 7 i

4. A self-contained water heating and de-- aerating unit comprising a casing having a deaerating space in the upper portion thereof,

a tray stack in said space, water distributing means above said tray stack, a water storage compartment below and open to said deaerating space, means for passing steam into said storage compartment, a plurality of U-shaped preheatingtubes atone side of said deaerating space and above said storage compartment, a closed vent condensing chamber at one side of and connected to said deaerating space and above said preheating tubes and containing a plurality of U-shaped water tubes,a water supply connection'to said condensing tubes at the front of said casing, a d water conduit means for connecting said-condensing-tubes, preheating tubes and said water distributing means inseries arranged at and confined to the front end of said casing.

' 5. A self-contained water heating and de-' aerating unit comprising a casing having a deaerating space in the upperportion thereof,

a tray stack in said space, water distributing means above said tray stack, a water storage. compartment below and open to said deaerat-' ing space, means for passing steam into said storage compartment, a plurality ofU-shaped preheating tubes at one side of said deaeratmg space and above said storage com'part ment, a closed vent condensing chamber at one side of and connected to said deaerating space and above said preheating tubes and containing a plurality of U-shaped"'ivater tubes, a water-supply connection to said con-f: densing tubes at the front of said casing,j means at the frontof said casing for connect ing said condensing tubesand preheating tubes in series, and a conduit arrangedatthe, front end of said casing connecting the discharge end of said preheating tubes to said Water distributing means.

' 6. A self-contained water-heating and de-f at one side of said deaerating space and above 7 said storage compartment, a closed vent con-t densing chamber at one side ofand connected to said deaeratlng space and above sald preheating compartment and. contalnmg a plu rality of water tubes, a water supply connection to said condensing tubes at the front of said; casing, conduit means confined to the front of said casing and connecting said con-- densing tubes, preheating tubes and water distributing means in series, and steam conduit means connected to one side of said preheating compartment, whereby the rear,top, and one side of said casingare free from external connections.

77.,A self-contained water heating and deaerating unit comprising a substantially rectangular casing having a deaerating space in the upper portion thereof, a tray stack 111 said space, water distributing means in said space above said tray stack and arranged to spray water onto said tray stack, a water storage compartment below and open to said deaerating space, a control float in said storage compartment, a plurality of steam tubes in said storage compartment, a vent con densing chamber in said casing at one side of' said deaerating space and separated therefrom, a port connecting said condensing chamber with the upper portion of said de aerating space, and door means in the front wall of said casing provlding access to said the opposite end of the tray, whereby in stacking said trays alternate trays must be reversed topermit the lugs thereon to be positioned in the proper notches in an adj a cent tray.

9. A tray stack adapted for use in liquid treating apparatus and consisting of a plurality of superposed trays wholly similar in form, each of said trays having one or more slotted overflow openings formed thereln,

and means insuring a stable stack formation of the trays and a vertical staggering of the overflow openings in superposed adjacent trays when said trays are arranged horizontally and stacked, comprising a plurality of vertically projecting lugs formed on each tray adjacent opposite peripheral portions thereof, a lug adjacent one of said peripheral portions being differently positioned relative to the corresponding portion of said periphery. from a lug adjacent the opposite peripheral portion, and each ofsaid trays having a plurality of recesses formed therein adjacent said opposite, peripheral portions for receivmg the lugs of anadjacent tray of said stack, each of said recesses being located at a point relative to one of said peripheral portions corresponding to the location of a lug on the oppositeside of said'tray relative to said opposite peripheral portion, whereby in stacking said trays alternate trays must be reversed in position to permit each lug thereon to be properly positioned in a correspending recess in an adjacent tray of the stack.

Signed atFort Wayne, in the county of Allen and State of Indiana this 9th day of October, A. D. 1928.

' PERCY S. LYONV l tray stack and float and through which the trays and float can be removed.

8. A tray stack adapted for use in liquid degasifying apparatus and formed by a plurality of superposed shallow trays of rectan V gular form and wholly similar in construction, each of said trays having a plurality of transversely spaced slots extending longitudinally thereof and symmetrically arranged relative to a line parallel to the longitudinal center line thereof, and means insuring a staggering of the slots in superposed adjacent trays when said trays are arranged horizontally and stacked consisting of lugs on one side of each tray adjacent the ends thereof, said' lugs being spaceddifferently from the corresponding tray ends, flanges projecting from the opposite side of each tray adjacent the ends thereof, and notches P formed in said flanges for receiving'said lugs therein, each of said notches being positioned relative to the adjacent tray end a distance correspondlng to thespacing of the lug at

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