US1063694A - Surface condenser. - Google Patents

Description

H. KELLER.

SURFACE CONDENSER.

APPLICATION FILED JULY 15, 1909.

1,063,394, Patented June 3, 1913.

WitrkesgZ: H d IQVznfi-pr; f u r'elc I e er 5 2 b g I Mitt-,3.

prove their action, and more. specifically to acitizen of Switzerland, residingat Zurich. Switzerland, have invented certain new and, itul Improvements in Surface Condensers, o-f whichthe following is a specification.

UNITED STAiifi PATENT;

HULDREICH KELLER, 0E ZUBICH, SWITZERLAND, ASSIGNOR ToeEN-EEA-nELEC rRio-Q COMPANY, A CORPORATION OF NEW YORK V J 1 SURFACE CONDENSER.

Application filed July 15, 1909. Serial No. 507,683.

To all whom it may concem: 1'

Be it known that I. H LDnEm-H KELLER,

The present invention relates to surface condensers and has forits ob e'ct to 1mimprove the action of the means employed to extract air from the condenser and also to increase the capacity of the condenser to condense exhaust steam.

For a consideration of what I believe to be novel and my invention, attention is directed to the accompanying description and to the claims appended thereto.

In the accompanying drawing, which is illustrative of my invention. Figure 1 is a longitudinal sectional view of a surface condenser and a centrifugal throwingpumpfor removing i air and water of condensation from saidcondenser, and Fig. 2 is-a similar View showing an additional pump for returning the condensation Water to the boiler.

Referring to-Fig. 1, 3 indicates the. easing or shell of a surface condenser containing tubes 4 through which the cooling or circulating water fiOWS. This water is admitted from a pump or other source of supply by the conduit 5 and is discharged by the 5 conduit 6. Exhaust steam from a turbine or other engine enters by the flanged conduit 7 at the top of the condenser and is condensed 1 as it flows downward over the tubes at. The condensation water is conveyed from the i under side of the condenser by the pipe 8 to the rotor '01 impeller of the centrifugal throwing pump 9, Located in the bottom portion ofthe condenser is an L-shaped or a other conduit 10 thatis so arranged that it will receive air and any uncondensed gases from Withinthe casing without receiving the: g condensation \vater.- The entrance to said conduit is located at suitabledistances above the lower Wall itif-itlle casing zsowihatl 1;

be contained and well" cooled ine-the :l ower portion oif the condenser "tosumilythe pipe-8. I

Under ordinary operat-ing cond-i-tions ivater \vill tend to'- a;cculnulate in tiie iower part. of. the casing, the water resultn and that drawn from the one; draining to Specification of Letters Patent.

of throwing water.

in the condenser by the tube is ;T h

from the 0011-: 1 ti'nual"condensationof the exhaust steam-w the bottom of the sufiieien tity to ma ntaln a bodyflojn aterthere'fr in which the throwing pump i condensed gases enter conveyed to the centrifii' il 9 by the pipe 11; As p'uinp is rotated by the electr tor 12 it clraivs watcriofic nd the lower portion of j tl the pressure of the Wate condenser to atmosphe je p'r ss mixture is dischargeddlii ug into the open tanker this tank the air and, escape from the W Ili'e leaves the tank by the ow; Extending into the tank" lower end submerged [a a1 16, the other end of ivl ch v. A, condenser. Owing to tliesuctionj flect erte'd by the condenser ajce the water of condensation from be automatically co e condenser to increase ts ,efi nv jcooling;,, action. At low absol'u ee ssi resi't e ab sorption of heat fron the iincondensed gass ask-A 1.1 i mit-he absorption can be inateriall i, ncreasei ho y 7 ever, by causing the gases to givenpftheir' heat to water and causing or permi -ringe s Water to flow over the condenser tubes. utilize this fact in'carrying out my'ifirvem tion and causethe Water of.condensationjtd '1 flow from the tank back to "thecondenser," and as it flows through the latter to 5b orb '90 heat from the contained-gassand deliyer or impart it to the tubesland the: Water flowing .theret-hriii glr j' LTo enhance' this action a. spraying devitfel'T s provided wh ich with advantage may take; th green of. 5' a perforated pipe that entendslx'vellinto he body of the condensen. The; passageio'f water throughfthis pipe is controlled pr; thr t-tledby a lmtterflyi'alve l8g= hat mounted. on a spindle; the latter being 15110 1 00 ided \yitlran arm 1}), Th eo iter the 1 it ZObymean.

nd: i

thedpeii mi said valve sud hence the amountof struction or arrangementa very active-circulation of the condensation water 1s secured and'a quantit-yof said water is maintained in contact with some of the tubes through which the cooling water enters.

Since the condensation water is taken from the coolest part of the condenser it'will be well cooled, this arrangement insuring a sufficient supply of pure water for the pump without the use of special cooling devices which is very desirable and especially so on received from the engine, and second to the water of condensation reconveyed to the condenser by the pipe 16 which water has had its temperature reduced by the action of the tubes and has been freed from air. And

further that said water will be fresh and free from impurities. Owing to the arrangement of the parts a certain amount of water will always be available for the throwing pump irrespective of the amount of exhaust steam supplied to the condenser. It

will also be seen that since an abundant supply of condensation water is provided for the throwing pump that the latter will be constantly operating to withdraw or pump air from the condenser casing thereby improving the condensing operation.

In Fig. 2 is shown a modification wherein the condenser is constructed and arranged "asbefore. The water of condensation is discharged through a pipe 22 whose end is turned downward and contains a seat for the throttle valve 23. The valve is mounted. on a stem 24 that is suitably guided, and on the lower end of the stem is a float 25 whose position is determined by the level of the condensation water in the condenser casing. Water and air are removed from the condenser by the centrifugal throwing pump 26' Condensation water is returned to the condenser by the pipe 16 as before. The condensation water and air are discharged from the throwing pump 26 by the pipe 13 into the tank 14. Instead of allowing the. excess Water to flow freely from the tank .itis conveyed by pipe 27 to the suction side of the centrifugal pump 28 by means of which its pressure is raised to the desired value, for example, to be returned to the boiler supplying steam to the turbine or engine that exhausts into the condenser. The impellers of the pumps 26 and 28 may advantageously be mounted on the same shaft and driven by a single motor 12 which may be an electric, fluid-actuated or other. motor.

.[The centrifugal throwing pump may be constructed in a variety of ways, but I pre-,

fer to use the construction and arrangements which form the subjects-matter of my United States Letters Patent Nos. 922,595; 987,994 and 987,995.

It isto'be observed that I not only utilize the condensation water to reenter the condenser and condense the steam which is a very desirable arrangement in itself, but I can also utilize the same water for pumping air out of the condenser, the two oper ations taking place simultaneously. This enables me to dispense with an extra pump for extracting air which reduces the initial cost and that of maintenance and also simplifies the system as a whole. Such broader features of the invention disclosed as are not claimed herein are claimed in my'copending application Serial No. 508,657.

In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodiment. thereof; but I desire to have it understood that the apparatus shown is only illustrative. and that the invention can be carried out by other means.

'Having now fully described my inven tion, what Iclaim as new and desire to secure by Letters Patent of the United States, is:

1. In a condenser system, the combination of a surface condenser having a casing in which a high degree of partial vacuum is to be maintained, a centrifugal throwing pump for simultaneously removing air and water of condensation from the condenser, a conduit conveying air to the pump from the casing; a conduit conveying water of condensation to the pump from the casing to assist in the removal of the air, means for conveying water of condensation from the discharge side of the pump back into the steam space of the casing where it mingles with thesteam, absorbs heat therefrom and gives it up to the cooling surfaces of the condenser, and means for conveying away the excess water of condensation.

2. In a condenser system, the combination of a surface condenser having watercooled surfaces and a casing in which a high degree of partial vacuum is to be maintained, a centrifugal throwing pump, a conduit conveying water of condensation from the lower portion of the casing to the inlet side of the pump. a conduit conveying air and uncondensed gases from the casing to the pump to be acted upon by the throwing water, an open receptacle that receives the discharge from the pump and in which the air separates from the throwing water, and a conduit that conveys water of condensation from the receptacle back to the casing under the suction efi'ect due to the vacuum noeaeae tion of a' surfacevcondenser having cooling surfaces and a casing in which a high degree of partial vacuum is to be maintained, means for cooling saidsurface, a centrifugal throwing pump that withdraws air and waterof condensation from the condenser and increases its pressure, a receptacle that receives said. air and water,'-a conduit one end of which is submerged in the water in thereceptacle and the other end enters the casing to return water of condensation thereto under the suct-ionetfect of the low pressure in the casing, and a spraying device in the steam space of the casing which is connected'with the discharge end of the conduit. I r

4. In a condenser system, the combination of a surface condenser having cooling surfaces and a casing in which a high degree of partial vacuum is to be maintained, means for cooling said surfaces, a centrifugal throwing pump that withdraws air and water of condensation from the condenser and increases its pressure, a receptacle that receives said air: and water, a conduit, one endof which is submerged in the water in the receptacle and the other end enters the casing to return water of'condensation thereto under the suction effect due to the partial vacuum in the casing, a spraying device arranged in the steam space of the casing which is connected to the discharge end of the conduit, a valve located in the conduitbetween the receptacle and said device, and means for operating the valve. i

5. In a condenser system, the combination of a surface condenser having cooling surfaces and a casing in which a high degree of partial vacuum is to be maintained, means for cooling said surfaces, a centrifugal pump that withdraws water of condensation from the condenser and increases its pressure, a receptacle that receives said water, .a conduit, one end of which is submerged in the water in the receptacle and the other end enters the casing to return water of con- 'densation thereto, a spraying device connected with the discharge'end of the con-- duit, a valve in the conduit situated within the casing for controlling the ,rentrance of water of condensation thereto, and afloat which actuates the valve and whose position is determined by the level of said water in the casing.

6. In a condenser system, the combination of a surface condenser having a casing and tubes through which cooling water is circulated, a throwing pump for removing air and water of condensation from the condenser, means' for returning water discharged from the pump to the steam space of the casing, a device for maintaining a body of water of condensation in the lower portion of the casing in contact with some of the tubes through which the cooling water enters, a conduit for conveying water of condensation from said portion of the casing to the pump to act as throwing water therein, a conduit for conveying air from the region of the condenser above said body of water to be acted upon by throwing water, and means for removing surplus water of condensation from the system.

7. A surface condenser containing tubes through which cooling water is circulated, .in combinatlon with a centrifugal throwing pump which simultaneously removes water of condensation and uncondensed gases, a conduit between the condenser and pump for conveying said water alone to the pump, a second conduit between the condenser and the pump for conveying said gases alone-to the pump to be acted upon by the throwing water, means for returning a portion of the water, of condensation to the condenser to increase its effective action, and a regulator for controlling the amount of water that reenters the condenser andnnaintaining a sup ply therein for the throwing pump.

In witness whereof, I have hereunto set my hand this 16th day of June, 1909.

HULDREIOH KELLER.

Witnesses Hninnrcir BoL'rsHAUsnR, CARL GUBLnn-.

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