US1516237A - Jet condenser - Google Patents

Description

JET CONDENSER Filed D60. 5 1920 INVENTOR ATTORNEY Patented N ov. 18, 19248 UNITED STATES;

FATENT' orrics.

DAVID W. R. MORGAN, F SWARTHMORE, PENNSYLVANIA, ASSIGNOR T0 TESTING- .I-IOUSE ELECTRIC AND MANUFACTURING COMPANY, A. CORPORATION OF PENN- SYLVANIA.

, Application filed Degcmber 3, 1920.

ing means therefor, and has for its object to provide apparatus of the character designated which shall be simple e-tlective in operation, which shall be readily removable for inspection and repair, and which shall be adapted for installationin relatively con-- fined spaces.-

In the accompanying drawing, Fig. 1 is a side view partially in section and partially in elevation of a jet condenser in accordancewith my invention, and Fig. 2 is a. view showing my condense-r as applied to a tur bins.-

In jet condensers, as customarily built, a centrifugal pump is provided for the re.-'

moval of the condensate, the rotor of this pump. revolving in a vertical plane. With condensers of larger and larger capacities, it is necessary that the diameter of. this rotor member be increased, leading to undue height for the: entire con-denser equipment because: of the degree of submerge-nee re quired for the: pump rotor.

In a co-p'en din'g application of H. F. Schmidt and myself, Serial No, 428,062, filed December 3, 1920 and assigned tothe Test inghouse Electric & Manufacturing Coin pany, we disclose the application of a propeller pump: to a jet condenser for the removal of condensate therefrom, the propeller of this pump rotating in ahoriz ontal plane at the discharge throat of the mixingich'amher. With this apparatus, extremely good results may be secured where the: installation space is low but relatively wide.

I find, however, that in many cases the turbine foundations are designed, as shown in Fig. 2, that is to say, the turbine foundation flares toward its foot, providing a tunnel or tunnels underneath the turbine having relatively little head room, and also having relatively little width at the bottom thereof.

Under these conditions, I find that an el- JET CONDENSER.

Serial No. 428,061.

bow may be obviously placed below the discharge throat of the mixingch amber and a propeller pump mounted to rotate in a vertical plane beyond this throat for the removal of condensate and for relatively large amounts of air. For more detailed understanding of my invention, reference need now be had to-Fig. 1 wherein a jet condenser is shown embodying a water box 5 and a mixing. chamber 6, terminating. at its bottom in a discharge throat 7. An elbow member 8' is attached below the throat 7 and provides a throat 9, thereafter flaring, as shown at 10', a propeller member 11 is mounted to rotate in the throat 9 in a vertical plane and may be provided witha flow l line hub: 12 and may further be provided with a prime mover 13, such, for example,- as animpulse turbine. The propeller member 11 and prime mover 13 are preferably mounted on a casting 14 having an inwardly extending: conical boss 15 for carrying the" propeller 11. By removal of the casting 14, the entire rotating system may be inspected and repaired.

The conical boss 15- may, if desired, be provided with radial vanes 16 to prevent eddying. and swirling of the water discharged fromthe propeller' ];1, and these vanes in turn discharge the condensate toa: collecting space 17 whence" it may flow through any suitable discharge pipe 18.

Air cooling and: removing means 19" of any desired formmay be used to supplement the action of the water removal means tomeintain high degree of vacuum Having thus described the arrangement of a jet condenser embodying. my inven tien, the operation thereof is as follows: The condenser being in intimate connection with a: prime mover, such,- for example, as a steam turbine, steam flows in the upper end there of: and encounters water sprays within below the water box 5, the condensate form ing' Within the mixing chamber 6 and accumulated at and below the throat 7. The propeller ump 11 is driven at relatively high speed by the prime mover 13 and forces the condensate through the throat 9, a rapid and efficient flow being set up by joint action of the propeller 11 and the guide vanes 16, the condensate escaping through the collecting space 17 and the con duit 18. The propeller 11 is more effective LUU 11 impulse turbine, high ble with a propeller in removing air than is the runner of a centrifugal pump, for the reason that no centrifugal action is present, as in a cream separator, but the mixture of air and the water is seized and forced out without affording an opportunity of separation, as takes place in a centrifugal pump. Thus a relatively small amount of air and other non-condensible gases is left for removal by a means 19.

A noteworthy feature of the employment of a propeller pump, as distinguished from a centrifugal pump, is that it may be directly connected to a prime mover for relative high speed, such, for example, as an speeds being permissiof proper design. In this way simplicity, efiicienoy and compactness are secured.

7 Turning to Fig. 2, it will be seen how a condenser arranged in accordance with my invention may be readily applied to a turbine installation wherein the foundation piers are relatively low and have relatively great flares. Substantially, my apparatus is placed beneath the mixing chamber so that head room is sufficient and the relatively this,

small high speed rotating member may be the pump propeller and the direct connected impulse turbine may be readily mounted in a space between the pier footings. Not only but a high degree of accessibility is provided in that the propeller driving means and the propeller together with all the bearings may be removed as a unit for inspection, repair, or replacement.

While I have shown my invention in but one form, it will be obvious to those skilled in the art that it is not so limited but is susceptible of various other changes and modifications, without departing from the spirit thereof and I desire, therefore, that only such limitations shall be placed thereupon as are imposed by the prior art or as are specifically set forth in the appended claims.

1. The combination with a jet condenser embodying a mixing chamber, of an elbow member disposed at the lower end of said mixing chamber for the discharge of con densate therefrom, an outwardly flaring member carried by said elbow member, a conical boss projecting into said flaring member to the head thereof, a propeller carried by said boss at the head of said flaring member, and a driving means for said propeller.

2. The combination with a jet condenser carried by said boss at the head of said fiaring member, a driving means for said propeller, and radial diffusion blades carried by said conical boss.

3. The combination with a jet condenser embodying a mixing chamber, of an elbow mounted at the bottom of said mixing chamber for the discharge of condensate therefrom in a horizontal direction, a flaring member carried by said elbow and provided at its outer end with a removable cap and collector member, and inwardly extending conical boss carried by said collector member and centrally disposed within said flaring member, a propeller mounted on said boss at the head of said flaring member, and driving means for said propeller, said'driving means also being carried by said collector member, whereby by the removal of said col-'.

lector member said propeller member and driving means therefor may be removed for inspection and repairs.

4. In a jet condenser, the combination with a mixing chamber, of a discharge member having an elbow portion communicating with the bottom of the mixing chamber. and a portion extending horizontally from-the elbow portion, and a propeller disposed in said horizontal portion adjacent to said elbow portion.

5. In a jet condenser, the combination with a mixing chamber, of a discharge mem-' ber having an elbow portion communicating with the bottom of the mixing chamber and a divergent portion extending horizontally from the elbow portion, and a propeller dis posed in said divergent portion. adjacent the region of minimum flow area thereof.

6. In a jet condenser, the combination with a mixin chamber, of a convergentdivergent disc arge member in the form of an elbow leading from the bottom ,of. the mixing chamber, and a propeller disposed in said convergent-divergent discharge member adjacent the throat thereof.

In testimony whereof, I have hereunto subscribe-d my name this 30th day of November, 1920.

D. W. It. MORGAN.

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