US1603092A - Condensation-removing means - Google Patents

Description

AEWIZ T9231 c. v v. MORDEN CONDENSATloN REMOVING MEANS Filed June e., l192:5

Patentedy our 12, 192s.

Y CHARLS' WHITNEY MORDENV,0F"WEST LINN,l OREGON.

ooNDENsATIoNmEMovING MEANS, p' 'A My invention has for lits object 'the removal 'o'f c`ondensat1on `from theI enclosed spaceo'tfa chamber connected tof a `source otvapor under pressure, and particularly from asteaml heated drier-roll rof a paper making machine. Y

'Y The steam is'usually introdueed'into'the drier-roll thru a hollo'vvfstub-axle. The steam will, ofcourse, condense more or less, and a removing means, such as a Siphon, is arovided for removing the condensatiom'one end otivliich s iphon is extended thrusaid hollow stub-tuilev into the .drier-roll, and thev discharging arm of'which- Siphon is con-J i nected toa Vcommon headerfpipe. Sincefthe steam pressure inthe drier-roll-tends to dis# charge the accumulated condensation thru thesiphon, yvhen the water is lowenough to' v uncover the'ends of the Siphon the steam. vvillA also escape, it' meanfsare`not providedy tov prevent the same. f -v Y The header pipe is therefore drained bya U-tube'of the Water-trap type.' When theV U- tube ismade ot sutlicient length,fthe Water r columnin the'dischargingarm ofl the' Uf' tube has a sutcient static head to take care of the maximum steam pressure in the drier# s ro'll,'witl1o'ut breaking the VvWater seal.

- 'umn of liquid in said-discharging arm of the' i U-tube, Vso as topreventthe breakingof rthe-y fliquid Yseal by af-predeterini'ned ,maximum 'increase in pressure of the heatingisteam;

But cases frequently varise Where the avail'- able space is insufficient in height, or the'v` proximity of other machinery, orjother con-y dition's, render it impracticable to install a Uftube of-sufticient length; vand since, as Welly knowm'jt takes approximatelyv 2.73 feet otstatic. headl foreverypound Tof pressure obtained'thereby, ,it is apparent that; a drier@k roll Whiehis heated by steam ,under any l substantial pressure wvould'require-` a very.- ,r lon'gU-tuba'in orderv toaccommodatefpro able variations 4in the steamffpressure, Witliout displacing the columnfof liquid in the; discharging 'arm vof the U-tube te" such lex-- v,tent 'as' to break the' liquidlow the steam to escape.

The obj ect of my invention is, therefore, to 1 provide a .valve controlling 'the emissions' rfrom the r'discharging arm of,` they U-tubef and furthermore toprovide means tor-ad-V 'ustinO or lvar fino the resistance of the valve l s s to'- being opened, thereby relatively' inereas` ing' the 'displacement resistance'ot the'col- Y Without breaking falls I attaingmy objecttby cembini'ngvwith the discharging arm of the U-tube a valve vC`on-` trolling the emissions ytherefrom,fand providing means for imposing 1a variable resistance `to thefopening of said valve, which means are adapted to `be yset so as to counteract a ,A predeterminedl minimum pressurel ofy said c steam in thel drier-roll; and the length of the U-tube isrelatively" proportioned lso as to be suticient toprovide a static head capable of counteracting the probable maximum increase 'ofV the pressure above saidV minimum' the liquidfSea-l in the;Uf tube. In otherwvords, the devices Vcombined are so relatively arranged andproportioned thatthe summation of th'erresistance imposed againsttheopening' otsa'idL lvalve and the static head isncapable oftaking care of a predetermined ,maxiinulinv 'steam4 .pressure in the drier-roll Withcut lbreaking""the liquid sealXj f V i" 5 Furthermore,

p l I provide? an ,auxiliary Weight, adapted vWhenl unrestrained, lto hold the valve shut, and electro-magnetic means s f adapted `when `yen e.rgi;/Jf.fd tev 'render' saidV aux-'Q iliary torcemeiiectlve. 1n Vorder toop-L erate these electro-magnetic `means' by variations inthe level of the liquid inthe intakev arm ot said Utube, Ifextendinsulatedtermi-` nals ofthe electric circuit of said electromag.

net spaced apart, into theinterior of ,thev ing of my. above mentioned devices and. other'in- 1 n c idental fr-ratures of my invention arehferen Y Y mattei fully described with reference to. the` Fig. Vlgis adiagrammatic representation of.V myv condensation -removing means @attached to a drier-roll otapaper machine; K d

F 27s "an"enlargedV sectional detail they circuit vbrealring;V device in` the electro l colleetiiig-'head in" place and l alig. 4' is seetionalvievv taken on the. liely Figs-31s,@ fragmentary longitudini sgec-` tienfotifadrier rollvvith a Spi-raltype f i `inagnetic means; byrfvvliich l the auxiliaryy 105 torce.isheldineffective;`

4 -4 of Fig. 3 and shows a spiral collecting head for removing the condensation from the drier-roll.

My device is adapted to be connected with a hollow drier-roll a ofa paper machine and which is novided with a steam inlet pipe l) which also serves as a journal on which the drier-roll rotates. In practice there are a number of these drier-rolls and `each one isV provided with condensation removing means, one type of which is the siphon pipe o which has an inlet .Z positioned insidezof the drier-roll7 and close to the bottom, 'so thatl the inlet will not be. uncovered vexcept when the level of the condensation vhas reached a very low point. rllie Siphon pipe 7) is smaller in diameter than the steam. pipe and it extends axially thru the steam pipe until it is past the journal a of the drier-A roll and then extends vertically towards the bottom thereof. All of the `sections of siphon 'pipe from Vthe different drier-rolls are Vconnected to a common header pipe e. Thisheader is drained by a section of pipo `0 which forms the kU-tube.

The outlet f of the irl-tube is connected to a chamber Vvin Awhich is located an inner chamber n provided with a port 7c controlled by a valve g which is preferably a balanced valve which is made with a double headed valve member k, of whichthe larger headv z', covers the port 7c in the bottom of the chamber l; and the smaller head is a piston reciprocating in the cylindrical port 7c of suiiicient length to accommodate theV movement of the valve head y' so that the port 7c will never be uncovered and permit con densation to flow past the head The drain or carry olf pipe m connects with the inner chamber n. The reason the valve 7i Vis preferably a balanced valve is because the device will not requirer such a heavy counterweightsince the pressure wit-hin the valve g acts en both heads of the valve member it. as Iopposed forces and thus the pressure acts against opposed heads which have ya difference in area and the resultant force tends tov-open theport 7c and permit the condensation to esca-pe. The valve it is ypivotally att-ached to a bar 0 which pivots about the point p. This bar 0 is preferably U-shaped nand is arranged horizontally. A balancing weight g is adjustably mounted on the upper portion of this bar 0 and vsaid balancing weight is held in set position by the set screw r. Said weight q in one position exerts a force on the valvemember la which tends to hold the valve headz' seated on the portV la, thus preventing the outflow ofthe condensationI thru the inner chamber a. An auxiliary weight s is provided which Y is held in inoperative positionvby the eleptro-magnet t. slidably mounted on the piv'oted pin u'and thus as the electro-magnet t becomes deenvvalve 7L shut.

Said auxiliary weight s isy ergized the auxiliary Vweight s will slide on the -pivoted pin u and will vact as an aux-A iliary medium tohold the valve z' on its seat on the port c. rlhe electro-magnet t is energized by the battery which'is connected by a wire fz, the ends of which, 'u' and o2, are bare and extend into the U-tube o at a point w slightly above the predetermined lowest point of the column of water in the descending leg of the U-tube c. These termini are yinsulated'from the said U-tube c at g/ and are mounted in plugs Z and thus Contact merely with the contents in the said U-tube. lf ,the -U-tube is full of water the circuit will be vmade from the battery thru the wire o and the winding of the electromagnetand thru the .con-tents of the U-tube back to the battery. lf the U-tube is not filled to the said predetermined level the circuit will of course be broken and the electro me `not will be deenergized permitting the auxiliary weight to fall and thus to; hold the untilv the leved .of the condensed vapor again reaches the point w yand close the circuit again energizing the electro-magnet. rlhe relation of the force exerted by the weight g and the length of the U-tube are so proportioned that the weight Q -will take care c of the minimum steam` pressure carried in the drier-roll, and U-tube will be of sucient length to take care of any variations in the pressure. The -summation of the two will therefore take carev .of the maximum pres- .ue without breaking the water seal in the U-tube so as to permit the steam to pass from the heating system. As is well known, the tl-tube does not exert any back pressure until the steam forces the w-ater level in the descending leg of the U-tube below the water level in the ascending leg. The difference in the height of the liquid in these legs will cause a back pressure to be exerted which tends to overcome the pressure which is forcing the water in the descending leg downwardly; lfthe U-tnbe is long'enough an equilibrium will be reached at a point at which the static head is equal tothe pressure exerted against the wat-er in the descending leg. This is approximately 2.3 .feet for every pound of pressure obtained. Thus, if it is desired to counteract live pounds of steampressure it is necessaryV to have a U- tube 11.5 feet long.

If, for exampleywithjmy improved device l desire tov take care of steam which n, n varies in pressure poundsand l have not sufficient room to install a U-tube which would take care of seven ounds but will onl taire care of five.

from two pounds Vto sevenb2, Which may be employed in place of the siphon 6^ shown in Fig. 1. The inlet end b3 of said spiralhead is located at the bottom of the hollow drier roll a and is theoutside coil of the spiral. The 'inside coil ofthe spiral constitutes the outlet end b4 which connectswith pipe b5 to va header. type of collector hcad'operates to scoop up the 'condensation in the hollowdrier-roll due to` the high speedxat which the latter rotates. The spiralpipe b2 is :fastened to the head a2 of the drier-roll byhbrackets a3; I provide ar rotatable joint bebetween the spiral section and the section b5, to permit theV latter Which isv stationary to be connected With the spiral pipe section Which rotates With the head a tube of the drier roll. Both the Siphon element b or the collector head element Z22, illustrated in'Figs. 1 and 3, respectively, are common tov drier-rolls; and there are also' variations kcf both, for example curved paddle' Whcels which scoop the condensation lfrom kthe vbottom, oi the drier-roll.l The Siphon element A is used on drier-rolls which rotate at la relativelyloiv speed and the spiral element b2' and similar types yof collector heads, .which de.- pend upon highspeed for scoopin'g'up the condensation are used on faster drier-rolls'l` preferably,` since'in'fthe latter lthe condensa tiontends to travel vvithfthe rotation of the drier-.roll due to centrifugal force.

I claim: y

rl'. In l a steam. condensation removing means of the character described, the combination of a U-tube, a valve controlling the outlet of said U-tube, means'forV balancing said vvalve relatively to a *mini mum vsteam .pressure in said'condensationv chamber, electrically operated kmeans' .for imposing a .supplemental closing 'pressure on said valve, and a circuit 'breaking device in the electrical circuit consisting of spaced terminals located in the interior of the in. l

take arm of the U-tube at a predetermined level, whereby to resist the breaking of the liquid seal due to excessive steam pressure '1n the condensation chamber.

2. In i a steam condensation removing means of the character describechthe com'- bmation of a U-tube, a valve controllmgthe outlet of said U-tube,a Weight-imposed on said valve rand adjustable to balance ap-` proximately a minimum steamfpressure in said condensation chamber, Velectrically operated means for imposing a supplemental Weight on said valve and a circuitbreaking device in the electrical circuit consisting of spaced terminals located in the interior of the intake arm ofthe U-tube at a predetermined level, whereby to resist the breaking of the liquid seal due to excessive steam pressure in the condensation chamber. Y

8; Iny a steam condensation removing means of the character described, the com- This f binationof a U- tube, means'for connecting f la predetermined level, whereby to rcsistfthe breaking of the liquid seal due to excessive steam pressure in'the condensation cham-` 4. In a steam condensation removing means of the character described, the combination of a U-tube having its intaking army extended a substantial distance above .the level of its outlet,means for connectingthe condensation chamber and delivering the condensation to the intake arm of the U- tube, a 'valve controllingthe outlet of said U'-tube, means for balancing said valverelatively tc a minimum steam pressure in said condensation chamber, electrically operated means for imposing a. supplemental closing pressure onsaidgvalve and a circuit break ing device in the electrical circuit consisting 'of spacedlterminals 4located in the-interior oftheintake arm of the U-tube at a predetermined level', whereby" tofA resist the breakingof the liquid sealdue to excessive'l'ooV steam pressure inthe condensation chamber' y t 5. Iny affsteam condensation removing means of the character described, the combination cfa U-tube, means vfor Vconnecting the condensationichamber and. .delivering the condensation to the intake arm of the U-tube, a valve controlling the outlet of said U-tube, a Weight imposed on said valve and adjustable to balance approximately a minimum steam pressure in said condensa-` tion" chamber, electrically operated means lthe condensation to the intake arm of the U-tube, a valve controlling the outlet of said U-tube, a Weight imposed on said valve and adjustable to'balance approximately a minimum V'steam pressure in` said condene' sation chamber, electrically operated means .3 1 e for vimposing a supplemental Vvv/eight' on ill said valve and a Circuit breaking device in the electrical circuit consisting of spaced terminals located in they interior of the intake arm of the U-tube at a predetermined level, whereby toresist the brealring'o'f the liquid seal due to excessive steam pressure in the condensation chamber.

7. ln a steam condensation removing means ot the character'describech the combination olf a U-tube, a valve controlling the outlet of said U-tube, electrically operated means 'lor imposing a supplemental closing pressure on said valve and a circuit breaking device in the electrical circuit consisting of spaced tern'iinals located in the interior of the intake arm of the U-tube at a predetermined level, whereby to resist the breaking oit the liquid seal due to eX- cessive steam pressure in the condensation chamber.

8. In a steam condensation removing means of the character described, the combination of a U-tube, a valve controlling the outlet oi' said U-tube, means for balancing said valve relatively to a minimum steam pressure in said condensation chamber, electro-,magnetic means forimposing a supplemental weight on said valve and a circuitbreaking device in the electrical circuit consisting of spaced terminals located in the interior ont the intake arm of the U-tube at a predetermined level, whereby to resist the breaking et the liquid seal due to excessive steam pressure in the condensation chamber.

9. ln a steam condensation removing means of the character described, the combination of a Uetube, means for connecting the condensation chamber and delivering the condensation to the intake arm of the U-tube, a pressure chamber to which the outlet end of the U-tube isy connected,pan inner chamber in said pressure chamber and provided with the waste outlet, a port in one wall of said inner chamber, a balanced valve controlling said port and an electromagnetically controlled weigl'lt located 'for being imposed on the free end o2 said arm and a circuit breaking device in the electrical circuitv consisting of spaced terminals located in the interior ot the intake arm oi' the U-tube at a 'predetermined level, whereby to resist the breaking of the liquid seal due to excessive steam pressure in the condensation chamber.

10. In a steam condensation removing means off/thev character described, the combination of a U-tube, means'for connecting the condensation chamber and delivering the condensation to the intake arm of the U-tube, a pressure chamber to which the outlet end of the U-tube is connected, an inner chamber in said pressure chamber and provided With the waste outlet, a port in one wall et said inner chamber, a valve controlling said port, the stem of said valve carrying a piston reciprocating in a cylindrical port provided in the opposite wall of said inner chamber, an arm pivoted on said pressure chamber with which arm the stem of said valve is connected, and an .adjustable weight carried by said arm and an electromagnetically controlled weight located for being imposed on the free end of said arm and a circuit breaking device in the electrical circuit: consisting of spaced terminals located in the interior of the intakey arm o the U-tube at a predetermined level, Whereby to resist the breaking of the liquid seal due to excessive steam pressure in the condensation chamber.

CHARLES WHITNEY lllOltDlN.,V

Images