US1394929A - Condrnser apparatus - Google Patents

Description

S. A. MOSS. CONDENSER-APPARATUS. APPLICATION FILED OCT. 8. 1919.

1,394,929, Patented Oct. 25, 1921.

5 A3 wi- 4V9VATER.

TOBOILER STEM- 20 Inventor, SanFor-d sq. Moss, 5 hi4 M 9 45 His flttorneg.

. conveying it away .directed to the accompan usual type of comprising the ejector comprising in parallel fluid for actuating UNITED s'rA'rEs PATENT oFnca.

IANI'ORD A. M058, LYNN, MASSACHUSETTS, ASSIGNOR T0 GENERAL ELECTRIC oonrm, A oonron connmrean To all whom it may concern:

Be it known that I, SANFORD A. Moss, a citizen of the United States, residin at Lynn, in the county of Essex, State of assachusetts, have invented certain new and useful Improvementsin Condenser Apparatus, of which the followingis a specification.

The presentinvention relates to condenser stems such as are used in connection with e astic fluid turbines, for example, and par-;

ticularly to such systems which comprise a surface condenser, a drawing condensate therefrom, and an e ector pump for withdrawing an and uncondensed vapors therefrom.

The object of my inventionis to provide an improved arrangement in such a system and for a consideration of what I believe to be novel and my invention, attention is ing descriptionand the claims appended t ereto.

In the drawing, the figure is a diagrammatic view of a system embodying my invention.

Referring to the drawing, indicates a surface condenser having heads 6 and 7 connected by tubes 8 through which the cooling water is conveyed. 9 indicates a conduit for conveying coolin water to the condenser and 10' a conduit for therefrom. The elastic fluid to be condensed (which may be exhaust steam from a turbine for example) enters the condenser through conduit 11 and the condensate runs out through opening 12. 13 indicates aconduit through which the air and uncondensed vapors are removed. Connected with conduit 13 is an ejector pump comprising two stages-a first stage 14 and a second stage two ejectors 15 and 16, connected the first stage ejector 14. Condensable elastic ejectors 14, 15 and 16 is supplied thereto through pipes 17, 18 and 19 all of which may be connected to a supply pipe 20 leading from an suitable source. Ordinarily, in the case 0 a steam turbine, steamis used as the actuating fluid and under such circumstances the pipe 20 may lead from the same boiler which supplies steam to the turbine. In pipes 17, 18 and 19 are suitable valves 21, 22. and 23 for con- Speoiflcation of Letters Patent. Application filed October a, 1818. Serial no.

liquid pump for with d to each other and in series 'to 4 A'I'ION or NEW YORK. armnn'ros.

Patented Oct. 25, 1921.

' trolling the flow of actuating fluid to the respectiveejectors. The suction inlet of ejector 14 is connected to conduit 13 b a ipe 24 in which is a. suitable valve 25. he lscharge pipe or mixing tube of ejector 14 1s connected by a conduit 26 to'the casing of anintercooler or condenser 27. 28 is a valve by means of which the discharge conduit of e ector 14 may be shut off. Leading from the casing of condenser 27 is a conduit 29 to which the suction inlets of-ejectors 15 and 16 uits.30 and 31 iuwhich are suitable valves 32 and 33 respectively. The discharge conduits or mixin tubes of ejectors 15 and 16 are connected 1n parallelto discharge pipe 34 which leads to a hot well 35. The end of discharge pipe 34 terminates beneath the level of the liquid 'in the hot well 35. 36 is a suitable pump for withdrawing liquid fromthe hot' well and delivering it to the boiler or' boilers which may be the ones which supply steam to the system. Condenser or intercooler 27 is of the spray type and comprises an upper chamber 37 sepa rated from a'lower chamber 38 by a partition wall 38 in which are suitable openings 40 through which liquid is sprayed. Fastened to and located beneath condenser g 5 is a well 41 which receives the condensate dischar ed through opening 12, and connecting min to chamber 37 of condenser 27 is a ength-of pipe 42 in which is a suitable valve 43. It will thus be seen that the condensate from well 41- is fed by ravity through pipe 42 to condenser 27 w ere it serves as a cooling liquid for such condenser. Pipes 26 and 29 connect with chamber 38 of condenser 27 and the lower side of such connected by a length of pipe 44 to a sultable'pump 45 here shown as bein a centrifugal pum In pipe 44 is a .valve 6. I Pump 45 is what is ordlnaril termed a condensate pump and has its discharge conduit 47 connected to hot well 35. Connecting well 41 to pipe 44 beyond valve 46 is an overflow pipe 48 which serves to convey liquid direct y from well 41 to the inlet of pump 45 after a predetermined high level is reached in well 41. I Leading into well 41 is a supply pipe 49 at the end of which is a valve 50 controlled by a float 51. Pipe 49 may lead from any suitable source of liquid supply. The arrangement is such that when open valve 34 to the hot well 35. Here they issue gas conduit the liquid in well 41 reaches a predetermined low level, float 51 will lower suflicientl to 5.0 and admit liquid to we 41. On the other hand when -the'liquid in well 41 is above a predetermined level, float 51 will maintain valve 50 closed. Connecting discharge conduit 13 to conduit 26 is a by- 52' in which is a valve 53. en valve 53 is open it will be seen that ejector-14 is by-passed. and ejectors 15 and 16 are then connected directly to conduit 13. 54 is a liquid level (gage glass for indicating the level of liqui in pipe 44.

In normal operation by-pass valve-53 is closed and ejector 14 and either ejector 15 or 16 or both of them are active. Condensable elastic pumping fluid being admitted to them through pi s 17, 18 and 19. Ejector 14 pumps air an unc'ondensed vapors from condenser 5 and the condensable elastic umping fluid, air and vapors discharged m it pass through conduit 26 to chamber 38 of condenser 27. In passing through chamber 38 they come in contact with the streams of li uid issuing from openings 40 in plate 39 t e result being that the condensable elastic fluid is condensed comletely or in part, and that the condensate 1s carried along with the liquid through pipe-44 to the suction side of pump 45, the

elastic fluid giving up heat to the liquid.

The air and uncondensed vapors are then drawn from chamber 38 through pipe 29 by the second stage of the ejector'p'ump an are delivered by it along with elastic umping fluid used 1n such ejectors throug ipe om the end of pipe 35 beneath the level of the liquid therein with the result that the condensable vapors are condensed giving up their heat to such liquid while the air and uncondensed vapors bubble out through the liquid. By this means it will be seen that all the heat contained in the motive fluid discharged from the ejectors is recovered being put into the liquid in the hot well, which liquid is used to feed the boilers.

Condenser or intercooler 27 is placed a distance below condenser 5 such that a liquid head will be established in (pipe 42 sufli.- ciently great to force li ui by. gravity through condenser 27, his means 0 course that'the liquid head be great enough to overcome the difference in pressure which exists between the suction sideand the dis-- charge side of ejector 14. Likewise ipe 44 is made sufliclently long to provi e a suitable liquid colum n tor feeding the liqmaintain a given vacuum,

a that the invention may .I f mac-pee I amenabled to adapt the ejecby'so do tor for ei er heavy load or light load. It

will be understood that by heavy load I mean when itis that a considerable-amount d uncondensed vaof air orsarereuiredtobe um inorderto p q P viiii ile h ligh load I mean where a comparative y lewr' amount of air-and uncondensed vapors are required to be umped in order to maintain the desi vacuum. The latter con-' dition exists, of course, when there little leakage of air to the condenser system, i. e., when the condenser system is tight. Under such circumstances. I find that I can maintain ample vacuum by using only one of the ejectors 15 or 16, thereby materially economizing theuse of the actuating fluid. Also in case for any reason, it is use the first stage ejector 14, then the same can be cut ofi by closing valves 25 and 28 and the second stage of {the pump con nected directly to the condenser by way of paipe 52, the y pass valve 53 being open.

y then using the two ejectors 15 and 16 in parallel, I can, tain a fair vacuum With the above will be seen that I utilize the condensate from the main condenser as cooling liquid for the intercooler of the multi-stage ejector ump thereby putting the heat of the for operation.

d flui discharged from the first stage ejector into-'such liquid. Also it will be noted that by placing the intercooler below conisbut desired or found necesary to not" described arrangement it with the single stage, ob-

denser 5 by the necessary amount, the condensate flows through it by gravity thereby eliminating the necessity of using a pump. Furthermore, b providing an overflow pi 48 and an aux' iary supply pipe 49, I ma s the system entirely automatic providing against'both an oversupply and an undersupply of condensate. I thus obtain a complete system which is simple in arrangement and eflicient in operation.

In accordance with the provisions of the patent statutes, ple of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof,

fbut'I desire to have it understood that the apparatus shown 18 only illustrative and other means.

What I claim as new, and desire to secure by Letters Patent'of the United States, is

1. In combination, a condenser, a multistage ejector pump connected therewith, an intercooler for said pump, said intercooler being located below said condenser, a conduit for conveying condensate from said condenser to said intercooler, said conduit being of such length that liquid will flow by gravity from the condenser through the in- I have described the princibe carried out by tercooler, and automatic means for supplying liquid to said intercooler in case the condensate supply is insufficient.

2. In combination, a condenser, a multistage ejectorpump connected therewith, an intercooler for said pump, said intercooler beinglocated below said condenser, a conduit for conveying condensate by gravity from said condenser to said intercooler, and a drain pipe for conveying away any condensate in excess of that required by said intercooler.

3. In combination, a condenser, a multistage ejector pump connected therewith, an intercooler between stages of said pump, said intercooler being located below said condenser, a conduit connecting the condenser to the intercooler, said conduit being of such length that the 'intercooler is located a distance below said condenser such that a head is established which provides a pressure sufficiently great to force liquid by gravitythroug said intercooler.

4. In combination, a condenser, a multistage ejector pump connected therewith, an intercooler for said pump, said intercooler being located below said condenser, a conduit for conveying condensate by gravity from said condenser to said intercooler, automatic means for supplyin liquid ,to said intercooler in case the con ensate supply is insufficient, and a drain pipe for conveying away any condensate in excess of that required by the intercooler.

5. In combination, a condenser, a multistage ejector pump connected therewith, an intercooler for said pump, said intercooler. being located below said condenser, a conduit for conveying condensate from said condenser to said intercooler where it is utilized as cooling liquid, said intercooler being located a sufiicient distance below the condenser that liquid will flow by gravity from the condenser through the intercooler,

a hot well, and means for conveying the coolinglliquid from said intercooler to the hot we i 6. In combination, a condenser, a multistage ejector pump connected therewith, an intercooler for said pump, said intercooler being located below said condenser, a conduit for conveying condensate from said condenser to said intercooler where it is utilized as cooling liquid, said intercooler being located a sufficient distance below the condenser that liquid will flow by gravity from the condenser through the intercooler,

a hot well, means for conveying the cooling liquid from said intercooler to the hot well and conduit means for conveying the discharge from the last stage of said ejector plllqli to the hot well.

n combination, a condenser, a multistage ejector pump connected therewith comprising a first stage consisting of a single ejector and a second stage consisting o a plurality of ejectors connected in parallel to each other and in series with said first stage, an'intercooler between said first and second stages, said intercooler being located at a lower level than said condenser and utilizing condensate from said condenser as cooling liquid, said interco'oler being located below the condenser a distance such that a head is established which provides a pressure sufiiciently great to force liquid by gravity through said intercooler, and means whereby either or all of said second stage ejectors may be used.

In witness whereof I have hereunto set my hand this third da of October 1919.

. SA FORD A. Moss,

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