US1787790A - Steam desuperheater - Google Patents

Description

Jan 1931- H. J. MASTENBROOK 1,787,790

STEAM DESUPERHEATER Filed March 29, 1929 I IIIIIIIIIIIIIIIIIIII umunmw w;

INVENTOR ATTORNEY Cir Patented Jan. 6, 1931 UNITED STAT-Es PATENT oFFicE HENRY J. MASTENBROOK, or CLEVELAND; HEIGHTS, OI-IIO, Assrenon TO THE swan-'1 WOUT COMPANY, or CLEVELAND, orrro, A conrona'rion or OHIO STEAM DESUPERI-IEATER Application filed March 29, 1929 Serial-N0. 351,005.

This invention relates to--improvcments in intimate contact, with water, the latter being atomized and vaporized by the velocity and temperature ofthe steam.

A further ob3ect is to provide a steam desuperheater which is simple in construction and eificient in operation. i

In the drawings Fig. 1 is a vertical sectional View of oneform of steam desuperheater constructed according to; my invention; Fig. 2 is a sectional detail :view o'futhe Water spray nozzle; ,and'Fig. 3 is a View corresponding to that of Fig. ,1 of a modified form. i

, In the form illustrated. in Fig. 1 of theaccompanying drawings the des up erheatcr comprises a hollow bowl-like casting pro-. vided atyitstop with an; outlet 11.; Below the outlet 'l'l-and formed an integral part of the bowl 10 is an annular downwardly projectinglip 12 tl' e'purpose of which will appear as thedescription-procccds. The bowl is also provided With an 1nlet 13 for superheated steam which enters at thetop of the bowl and includes aportion'14 wh ch eX- tends downwardly in the bowl and 1s concentric therewith. The discharge end 15 off the inlet is constricted and is disposedbelow the annular lip 12. 'A water inlet pipe'16 extends through the top of the casting 10 and into the. steam inlet conduit 14 terminating at a point concentric with the downwardlyex tendingportion 14 and a short distance abovethe constricted end portion 15. Screwed into the end of the pipe 16 is a conical water de-' flectin member 17 which disperses the water in a fine spray within the steam inlet 14:. The bottom of the bowl 10 is closed by a cap 18 which is provided-at its center with an. aperture 19. into whicha dra n pipe 20 is secured. The drain pipe 20 may be connected to any'suitable steam trap. Screwed into the. inner end. of the opening 19 is a pipe 21 which extends upwardly a short distance in the casing 10. On the upper end of the pipe 2-1is-a T 22.

In operation the superheated'steam enters. through theinlet 13 and passes through the restricted opening 15 into the bowl 10" from where it escapes through the outlet 11 in the top of the bowl. To reduce the temperature of the superheated steam, water is introduced through the pipe .16 in the form oi? afine sprayso an intimate mixing of the water with the. column of steam is efiected. -A large portion of the water is thus vaporized and in the vaporization of this water the temperature of the steam is materially decreased. The water which is not vaporized iills the lowerend of thebowl'until it reaches the level of the T 22. Due to the rush of the steam from the discharge 15 into the bowl, the Water in the bottom of the bowl will assume the position illustrated in dot and dash lines in Fig. 1. A large amount of this water will be vaporized by the contact of the steam therewith, and any excess 1 will pass out through the overflow 21. The annular lip 12 preventsthe steam from forcing water as not been vaporized into the outlet of course apparent thatthe amount 0i? water admitted through pipe 16 is con- In the form ofdesuperheater illustrated in" .Ffig. 3, the hollo'w bowl like casting is made in two parts. The top part 25 is pro-vided with an outlet '26 and an inlet which includes a portion 27 concentric with the cast-ing 25.

The lower part 28 is merely a hollow cup shaped member whichis provided in its bottom with a threaded open1ng29 into-which thedrain pipe 20 and overflow pipe 21 are secured; the. overflow pipe 21 being provided at its top end with theT 22. the same as in; the form above described- The parts 25 and. 28 are provided'attheir adjoining ends with flanges 30 and 31 respectively which are apertured to receive bolts 32 for securing the parts together. interposed between the parts 25 and 28 is a metal ring member 33, the inner edge of which extends into the bowl and is bent downwardly to form an annular lip 34:, corresponding to the lip 12 in the form illustrated inFig. '1

The lower end of'the steam inlet conduit 27 terminates in the same plane as the bottom end of the member 25, and is provided with a flange 35 apertured to receive bolts 36. Bolted to the flange 35 is a flanged ,e zc tension 37 and between the two as they are bolted together is secured aplate 38 provided at its center with an aperture 39 materially less in diameter than the conduit 27', which serves the same purpose as the constricted portion 15 in the form first described, name- 1y, toincrease the velocity of the steam as it leaves the conduit 27. Extending into the inlet 27 and terminating a short distance above the plate 38 is the water inlet pipe 16 provided with the nozzle 17 The operation of this desuperheater is of course the same as the one above described, the lip portion 34 serving to prevent the water in the bottom of the bowl 28 from being carried over into the outlet The force of the steam as it escapes throng-lithe opening 39 in theplate 38 causes the water in'the bottom of the bowl 28 to assume a position approximating that shown indotand dash lines and at the same time evaporating considerable of it, the exposed surface of the water being greatly increased due to the action of the steam thereon. l f It is of course understood that the water in the water inlet 16 must "be under a? pressure greater than the pressure ofithe steam in the steam line.

Having thus described my'invention, what I claim is 2' I 1. A steam desuperheater comprising vertically disposedsubstantially annular cas ing composed o f an upper part provided with an outlet, an inlet conduit including a portion extending downwardly into and arranged in concentric relation with the upper part of said casing, the bottom ends of said upperpart and ofsaid inlet conduit terminating in the sameplane, a member secured to the bottom end of said inlet providedwith an openingmaterially less in diameter thanthe said inlet for increasing the velocity of the 'fluid as it IS discharged from said inlet conduit, a water inlet pipe projecting into said inlet conduit terminating at a po nt concentric with and slightly above'the bottom.

I end of the inlet,.an d means at'the end of the pipe for deflecting the water in the forni of a line spray, ane'longated bowl portion secured to the bottom'en'dofthe'upper member for closing, the sa-me,-a-nd ineans' n the bottom of-saidbowl for drainingqexcess water therefrom.

7 construction nating in the same plane, a member secured :to thebottom end of said inlet provided with an opening materially less in" diameter than the said inlet for increasing the velocity of the fluid as it is discharged from said inlet conduit, a water inlet pipe projecting into said inlet conduit terminating at a point concentric with and slightly above the bottom end of the inlet, and means at the end of the pipe for deflecting the water in the formof a fine spray, an elongated bowl portion securedto' the bottom end of theup- .per member for closing the same, a drain pipe extending upwardly. in the bottom of said bowl through which accumulated water may flowafter a predetermined levelis reached.

3. A steam desuperheater comprising a. VGltlCilllf/ disposed substantlally annular cassaid inlet conduit terminating at a point concentric with and slightly above the bottom end of the inlet, and means at the end of the pipe for deflecting the water in the form of'a fine spray, an elongated bowl-portion secured to the bottomend of the upper member for closing the sameymeans in thebottom of said bowl for-draining excess water therefrom, a ring member secured between the upper. part and said bowl,'the inner diameteroef said ring being less than the diameter said casing whereby an annular flange is providedon'the inner periphery of said casbelow the outlet to prevent water from being forced upwardly along the wall of the casing by the force of the steam.

' 'a A steam desu-perheater comprising a vertically arranged casing having its opposite ends closed, a conduit for steam projecting into said casing adjacent the upper end thereof and arrangedto discharge steam axially of said casing toward the bottom thereof, the said conduit being provided with a I adjacent its delivery end through which the steam must pass, there being an annular 'passag provided betweenthe axially extending portion of the conduit and the casing and the said casing having an outlet for steam adjacent theupper end 5. Asteam desuperheater comprising a V vertically arranged casing having a closed top and bottom and havlnga conduit extendmg therelnto from one side thereof ad acent to thetop and projecting axially downwardly V within the casing andspaced therefrom, the

said casing also having an outlet for steam in the upper portion thereof, said conduit having a constriction adjacent the lower end' thereof through which steam must pass, and a water conduit extending into the first mentioned conduit above and adjacent to the constricted portion thereof for supplying water in a spray into the first mentioned conduit, the said casing having an annular down:

wardly projecting lip surrounding the downwardly extending portion of the first men tioned conduit and spaced therefrom.

6. A steam desuperheater comprising a vertically arranged casing having a closed top and bottom and having a conduit ex:

tendin thereinto from one side thereof adjacent to the top and projecting axially downwardly within the casing and spaced therefrom, the 'said casing also having an outlet for steam in the upper portion thereof, the said conduit having a constriction adjacent the lower end'thereof through which steam must pass, a water conduit extending 'into the first mentioned conduit above and adjacent to the constricted portion thereof for supplying water in a spray into the first mentioned conduit, the said casing having an annular downwardly projecting lip sur rounding the downwardly extending portion of the first mentioned conduitand spaced therefrom, and a drain pipe extending upwardly from the bottom of the casing with its inlet opposed to and spaced from the delivery end of the first mentioned conduit.

In testimony whereof, I hereunto aflix my signature.

' HENRY J. MASTENBROOK.

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