US1159778A - Condensing apparatus. - Google Patents

Description

APPLICATION FILED HAY I9. 1915.

C. V. KERR.

A coNnENsmG APPARATUS.

Patented Nov. 9, 1915.

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C. V. KERR. y NoENsmG APPARATUS.

AP'PucATloN man MAYIQ 1915 Patented Nov 9 1915 2 SHEETS-SHEET 2.

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e UNITED STATES PATENT o-Fnion. n

CHARLES V. KEER. 0F CHICAGO.y ILLINOIS.

Be 'it.l` n6w1r"tl1at I, CHARLES Y. Kenn, a citizen jot" the *I'x'iited' States, residing at inftli'county'of Cook and State min. have invented certain new and useful Improvements inCondensing Apparatus. tion.

,p )Ijivinvention 'relates to steam condensing "apparatus for engineplants and of the type which I' have termed barojsurface vcondenslng.

neetl up `the same. as .to enable the water passing through .tl1e.,condenser to .act and perform the function-of withdrawing the airfin the condenser which has been liberated from the condensedV exhaust steam; second. 'to so construct. arrange and connectup dfiierent elements comprisingk the sw.

tem.. that a high vacuum is producedin the v condenser without theuse of a costly and apart. quickly inspected or repaired, and

kept clean of incrustation: fourth. to so con- 'strnct and arrange the parts ofthe air pump. and so connect the same up in the apparatus. that a high vacuum isproduced -in a surface 'condenser without the use of a pistonv air pump operated liv steam or other motive fiuid: fifth. other objects. and advantages of the construction and arrangement of the apparatus will appear from the de-` tailed descriptii-)n of the preferred form. to

behereinaftergiven. n

The invention consists of structural fea-` tures aml'relative arrangements of the elements connu-Bing the-invention which willA be lnreinafter more fullvilescribedfa'd par` tvularlypointed outiu the appendedfclaims.

illutrating the'V preferrml formnfffmy innrs 'indicate the sinnei parts: in the several of which' the following isa specifica-v Ihe-,objects of my invention'are. first. to so -,a1-range andfconstruct thecirculatmg, pump,condenser, and air pump. and :con-

'A coNnBNsING Arrnnamus.

. rateatedxona, 1915.

gitudinzl section of the air pump on line IIs-II ot Fig. 3; F ig. 3 is a transverse section of the pump taken on line IIIQIII of lig. :2; and Fig. l is an enlarged side view partly in section jshowing the relation of the tubes and tube sheets of the air pump.

In the drawings as shown in F ig. l, the y numeral 1 indicates a circulating pump of the centrifugal class,' of any approved form, but more especiallyr of the type shown in my co-pending application for pat-ent,

Serial No. 786,916 and filed August 2T, 1913. The inlet orfsuction side of said pump 1 is connected b v means of thepipe 2 with any suitable cooling water supply Interposed inthe pipe 2 between the cooling water supply tank 3 and the suction Inlet of the pump 1, is provided a screen' box 1 to intercept any impurities or fioating material and keep',- them from passing into the pump 1 and the condenser.

5 is any condenser ofthe surface type, but preferably of the form shown in my copending application Serial No. 7 96,747 filed Oct. 23, 1913, and is provided with an 'upper steam inlet 6, a lower condensed steam outlet 7, and a lower air collecting cham'- ber 8, having an outlet 8. Said condenser 5 is also provided with a lower water inlet 9 and an upper wat-er outlet or discharge 10, said inlet 9 being connected by' means of a pipe 11 with ythe discharge outlet of -the pump 1. In said pipe 11 between theinlet 9 of condenser 5 and discharge of the'pump 1. is interposed a check valve v12 to prevent the water from running downward in the piping, if the pump 1 is stopped for any reason.

Atthe top of the condensing apparatus is provided an improvedform of baromet ric?T air pump 13,. which may be carried byany suitable supports. not shown, and said pump consists of a casing 1-1. preferably conical in sha pe at its lower portiomand `cylindrical at its upperportion that forms va lower "air suction chamber 15. having a' lowerllatera'l aininht opening,1(3.4`connected withnza branch pipe 1T. ('see Fin'. The 'cylindrii cal. ork upper por-tion .is provided -with an ,L95

upper` opening ,1S andthe lowerportionjwitlj alower opening or discharge 19. The open; ing 1B iraclosedbyr a circular kperforated plate l '20,. lirough. whichisA inse d and supfignzted: antheir.npper ends a v of depending tubes )lfln-eferablv of n1- form diameter aim of such length as to ex- 'Water chamb'ersection 22, provided 'with a. water inlet' opening 23.

Seated upon the upper flange of the cylindrical water 'chamber 22, is a plate 24', having a series of perforations smaller in diameter than the perforations in the plate 18, but arranged directly over the same. Inserted in the perforations of the plate 24 is i aseries o f depending tubes 25, smaller in diameter than the tubes 21, of fplate 20, and whose upper ends 'are securel fastened to vthe plate 24, while the body o the tubes 25,` pass through the water chamber '22,' and v .their lower ends extend into and nea-r the ends of the tubes 21, as 'clearly shown in, Figs. 2 and 4.

- Attached to the cylindrical water chamber sect-ion 22 is a cap 26, having formed therein an upper'n air suction chamber 27: Provided Withupper' air inlet 28, to which is connected'f branch air pipe 29 as shown in Fig. 2, and* for purposes to be presently described. The water outlet `opening 10, of the condenser 5 is' connected bya pipe 30, with the water inlet 23, of the airpump 13, and pipe 31,

connects the outlet8, of the air collecting ldenser 5.

chamber 8, in the condenser 5, by means of the branch pipes 17 and 29, with the lower and upper air suction'chamber's 15 and 27, respectively, within the air pump 13. The discharge or lower opening 19, of the air pump 13, is connected by a pipe 32, for-conveying the water and entrained air to a tail race 33.

The operation'I of the invention is as follows T he circulating pump 1 having been primed, is put into operation and as soon as vacuum is formed, aexhaust steam is passed through they upper inlet-6 andinto the con- Said pump draws the cooling water from the supply tank 3 up the suction pipe 2 through the screen box l and forces said water from the discharge of the pump bevond the check valve 12 through the pipe 11v into the lower water inlet 9 ofthe sur-v face condenser 5.tlience around the outside of tubes of the s urface condenser and out of vthe discharge opening 10 and up'V and through the pipe 30. The cooling water reaching the upper end of the pipe 30, flows into the inlet 23 of the water'4 chamberl '22 of the air pump 13, 'and is distributed uniformly around the upper tubes 25, and over thel perforated plate 20, fromwhence said water flows into the annular spaces between lthe lower section of the tubes 25, andthe upper ends of the tubes 21 and down through the dependingI tubes 21. .The water f y the efficient operation thereof, as the` within the depending tubes 21 passing the water discharging from the lower endsof the tubes 21, forms a series of separated water jets vwhich present a large total surface to the air, said jets Ydrawing the air surrounding the tubes 21, and collected in 'the lower air suction chamber 15, and lcontinually forcing or ejecting the air into the lower section of the conical casing 1l where it. becomes entrained with the rapidlyfde. scending water falling through the 'disf v chargeor lower opening 19into the pipe 32 from which the air and water are conveyed to the tail race 33. As the cooling water continues to flow downwardly through the the upper side and flange of pipes or tubes 27, a high vacuum is also produced in the air'suction chamber 21, and y'lie air liberated from the condensing steam nd collectedlat the bottom of `the condenser the air chamber 8, passes through the opening 8', into the air discharge pipe 31- and is drawn through the inlet 16, by branch pipe 17 into the space surrounding the tubes 21, where said air is constantlyand etticiently carried down and out with the discharging water. rlhus it lwill be seen that the same water' thatis kemployed to condense the exhaust steam in the condenser is used to evacuate the air from two chambers in the condenser, and -hence the airy from the condenser is divided and enters the air pump 13 into said suction chambers above and below the water chamber or inlet, and thereby gives double the surface of contact betweenv -the water Vand air thanl accomplished in prior devices for the same purpose, which construction and arrangement as will be 'readily seen, avoids the use ofthe usual cost-ly and complicated piston air pump, and reduces the condensing system of steam plant to its simplest, compact and .most eliicient forni. Furthermore, as their'- cooling water is taken from and discharged to the.

saine level, the power required in the circulating pump is only that necessaryto overcome the (friction in the piping and condenser, and on account of the large cross ion section of the condenser employed, the frictional resistance is reduced to a minimum; Also in view of the cooling water discharged from the air punip carrying air with it-at the temperature 0f the water. the densit-yi'of said watei' is less than -normal and itis found best to arrange the lower end of the ai'i' pump 13 formed thereby from thirty to forty feet above the level of the tail race and while somewhat higher than the-usual barometric condensers; it is'not" detrimental vacuumvr in the barometric airfpump 13 is to the height mentioned.

As will be seen from the foregoing detailed` description of the system. and its method of operation, all the objects and advant-ages of the invention recited in the. stzitement 'of invention are fully and etliciently carried out, and the condenser is capable of maintaining a high vacuum with a ymlnimum consumption of cooling water and coal.`

Yhat "I claim is l1. A condensing apparatus comprising a surface condenser having a water inlet, a water outlet, an exhaust steam inlet, a condensed steam outlet and an air collecting chamber,.an air ejecing5 pump casing having a water chamber provided with a water inlet connected above the barometric height with the water outlet of the condenser, a water outlet connected with a tail race, and

' an upper and a lower air exhausting chamber, respectively, above and below said water chamber and connected with the air collectingchamber -of the condenser, a lower 'series of tubes within the air pump casing, said lower tubes being so arranged as to. have their upper ends in communication with the water chamber and water inlet of the pump y Series of tubes within the water chamber of smaller diameter than the lower series of tubes and having the upper ends 1n communlcation with the upper air exhaustlng chamber and their lower ends passing into the upper open ends ofthe lower series of tubes, and a circulating pump having its inlet connected with acooling water suppl)v and its discharge connected with the inlet of the surface condenser.

2. A condensing apparatus comprising a.

posed at a higher level than the condenserv having a water'chamber provided with a water inletconnected above the barometric height with the water youtlet of the condenser, a water outlet connected with the tail race, and an upper and a lower air exhausting chamber. respectively, above and below said water chamber and connected with the air collecting chamber of the cndenser, a lower series of separated vertical tubes within the air pump casing. said tubes being so arranged as to have their upper ends in communication with the water chamber and water inlet of the pump casing and their lower ends discharging into the water outlet of the pump casing and in communication with the lower air exhausting chamber -ot' the pump casing, an upper, f series of tubes within the water chamber of smaller diameter than the lower series of, tubes and having 'the upper ends in ,com- 70 p municatiom with the upper Aair exhausting chamber and-theirlower ends passing into the upper open ends ofthe lower series o tubes, and a circulating pump having its inlet connected with a cooling water supply and its discharge connectedwitlrthe inlet of the surface condenser.

3. A condensing apparatus comprising a .surface condenser having a water inlet, a

water outlet, an exhaust steam inlet. a con- 8% densed steam outlet and an air collecting chamber, an air ejecting pump casing having a water chamber provided with a water 'inlet connected above the barometric heighg with the water outlet of the condenseijyafg5 water outlet connected with a tail race, and an air exhausting chamber above said water chamber and connected with' the air collecting chamber of the condenser, a lower series of tubes within the air pump casing, said 9o lower tubes being so arranged as to havetheir upper ends in communication with the water chamber and water inlet of the pump casing and their lower end discharging into the Water outlet of the pump casing, an upper series of tubes within the water chamber of smaller diameter than the lower Se-fv ries of tubes and having the upper ends in communication with the air exhausting chamber and their lower ends passing into 100.

the upper open ends of the lower series of tubes, and a circulating pump having its inlet connected with a cooling water supply and its discharge connected with the inlet of the surface condenser.

l. A condensing apparatus comprising a surface condenser having an air collecting chamber, a circulating pump connected with the condenser, an air ejector pump consisting of a hollow conical casing having a lower annular air exhausting chamber and air inletatiits larger end connected with the condenser, and a water outlet at the smaller end, a .water chamber above said conical casing, an air exhausting chamber above the water chamber having an inlet connected with the air collecting chamber of the condenser, a lower series of separated tubes within the lconical casing and projecting through the lower air exhausting chamber, 1:20 said tubes having their upper ends comnninicating with the water chamber and their lower ends in communication with the i lower air chamber and discharging in-to the tubes.

-the upper open ends ofthe" lower series of 5.,*A condensing apparatus comprising a Surface .condenser having an an' collecting chamber, a circulating pump connected with fthe-condenser, an air ejector pump situated' *above the condenser and consisting of a hollow conical casing ,having a lower annular air exhausting chamber and an air 1n- .let. at its largerend connected with the con,-

A-fd'en'serg and-a water outlet at the smaller or lower end, a water chamber above said coni,- call .vcasing, a lower perforated plate sepa- ,"rating 'the vupper end' of the-*conical casing from the Water chamber, 'a series of sepa- '.rated tubes Within the ,conical casing and projecting through the lower air exhausting chamber, said tubes'vhavi-ng their upper ends secured in the openings 'of the lower'perorated'plate and communicating with the' Water chamber and Water inlet and their lowerrendsdischarging into the water outlet of the conical casing, an upper 'lair exhaust-v ing chamber above the water chamber havingl an inlet connected with the air collecting` chamber of the condenser; an upper'perorated plate separating the'upper end of the water chamber from the lowerend of the upper air exhausting chamber, and an upper series of tubes within the water chamber of smaller diameter lthan the lower series of vtubes and having their .upper ends securedinthe openings of the upper perforated plate and in communication with the upper air exhausting chamber and their lowerends passing into the upper open 'ends of the lower series of tubes.v In testimony whereof I affix my signature,

in presence of two witnesses. v

CHARLES V. KERR.

Witnesses:

` Cries. F. RoCKcAs'rLn,

T. J. RooKoAsTLn.

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