US1020704A - Utilizing waste steam. - Google Patents

Description

infirme Kinsnnj BERLIN, GERMANY, AssIGNoR 'ro GENERAL A conroRATIoN on NEW roux.

ZZ t may concern: ,y Be vit-f known that I, VALTER Krassa, a' citizen ofSwitzerland, residing at Berlin, Germany, have invented certain new' and useful "Improvements in UtilizingfVVaste Steam, .of tvhiehthe following is .a specifica- ,tion'f'f '1" This invention relates to machines in which a rotating shaft passes through the wall of a' steam `chamber?` @ne instance of such a ystructure is `found in a steamturbine, The shaftv is Iusually provided with' astutfing box; to `prevent excessive leakage- I bf'. steam, but aditiiculty which makes itl' self felt in these machines.' is. that in the case Where the chait1iber*"'co 1'itLainsf.steamy of high pressure, the leakage steam not only con. denses on 4adjacent parts of the machine,

` causing unsightly deposits, but it .is also entirelyllost so far as further use is concerned.y Moreover, if the turbine is operating with low-pressure steam or witha vacuum and the stufiing box is packed with steam to pre-- vent the entrance of air under atmospheric pressure, suiiicient high pressure steam must.

' be'introduced into the stutiing box to pass out at the end thereof in order that the engi. neer may vknow that the packing is operative. If the supply of steam is so small thatJ it is all sucked into .the turbine casing then the engineer has no way of determining' the condition of the packing and its degree of efficiency. To overcome these difficuties, I admit sufficient steam to the stuifing box to produce a certain amount of leakage, but I provide means`fo'r utilizing this `leaking steam in a suitable manner; such,

Jfor'instance, as the heating of feed water,

nular groove t .in order to conserve the heat of the waste` steam. The constantflow of the water produced bythe condensation of said leakage steam is a vi'sibleindication to the engineer that the packing is in working/order.

The accompanying drawing illustrates an embodiment of myinvention in a steam turbine.

Steam is supplied to the turbine casing 1 through a pipe E2, and exhausts through the conduit 3. The turbine shown is a reaction turbine and its shaft 4 passes out of the casing through a stuiiing box 5 which leaves a small annular space 6 around the shaft through which a .portion of e the exhaust steam gan escape. It is caught in an ansurrounding the stuffing box U'rILtzING WASTE zsmnaivr.

and communicating th steam gives up its heat o feed water heater enable ydensation to be directed ntolapip be utilized." They fee .heater through a pipe," y

groove it is led by a pif tus for. utilizing it; for water .heaterl 9,y in` whic pipe 10connected with th j and is condensed. A the continuationl of the' pipe sfbyoad the "vate f tendingthrough the Cof reservoirlSLso that` it rises to the top, a

ypipe 1.5.- .wa-e een passes by a pipe 16 to tite oi'ler If the turbine is not, as shown in the drawing, a non-condensing turbine, but one operating with a condenser, steam from a stage' or other regionfof suitable pressure must be supplied through a special pipe 17 to one end of the low pressure stuiiing box,

and passes thence to the condensing coil 10.' An important advantage in this connection the fact that at any time, notwithstanding the utilization of the leakage stea1n,'the eiiiciency of the steam packing in the stufling box can be obserl ed and regulated. This is a valuable feature because the supply of stuffing box steam varies a great' deal, usually in accordance with the load on the turbine. To cbtain this result, it is .simply necessary to turn the three-way cock 11 so that the `water of condensation instead of' dropping 90 through the pipe 12 flows'from the open end of the pipe S and drops through the opening 118 in the top 'of the reservoir 13. It is thus visible at all times to the engineer, and if the pressure or the amount of the stutling box exhaust is not sullicient to prevent the entrance of air into said box, the water will stop dripping from the pipe 8. The engi,- neer will then have to increase the supply of steam to thestutiing box until the flow of condensation water is resumed. It is desirable to arrange vthe feed water heater coil and the discharge therefrom as low as possible below the stuffing box""in.order to eect a satisfactory dropping of the water of condensation. Instead of utilizing the water as a. visible signal some other form of alarm` may be actuated thereby, or be released when the water ceases to flow, as will be readily apparent to "the skilled engineer.

1n accordance with the revisions of the patentstatutesJhave described the principle .of operation of my invention together with the apparatus which I now conslder to rep'- fresent the best embodimentthereof'; but I after it leaves said stuffing, box, and a device for indicating flow of steam from the 'stuffing box'to said means.y Y i Q. The combination with'a steam turbine having a stuffing/box, permitting leakage' of steam, yof a pipe for' conveying `away the waste steam, means for condensing said steam, and a device for indicating the quantity of water of condensation. v

3. `The combination with la steam turbine having a. stuiing boxlpermitting leakage ofsteam, of a pipe for conveying away t e .waste steam,'means for conserving the heat of said steam cnsistng'of a. feed water- 4. The combination'with a steam turbine vhaving ja stuing box permitting a leakage of steam, of apipefor' conveying away t e waste steam, meansA for condensing, the

lsteam in said pipe,l and means whereby the waterof condensation serves to indicate'the 'condition of said stuing box as to'voperativeness. a I

5. f The combination with a turbine having a steam stuing box, yofa pipe for conveying away the waste through which 'the pipe passes, a tank receiving feed Water from the h eatel',l and means' for visibly dischargingthe water of condensation from the pipe into the tank.

steam, av feed Water heat-er.' I

In witness whereof, I- have hereuntouset my hand this 22nd day of September, 19,10. 'A

'WALTER KIESER.. Witnesses: f

FRANz KLsscaucn, HRMANN Hmm.

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