US1622945A - Low-level jet condenser - Google Patents

Description

March 29 1927.

Randolph E'. S. Geare 4R. E. s. GEARE ETAL LOW LEVEL JET CONDENSER Filed Dec. l. 1924 A'rroRNEY WITNESS:

Patented Mar. i29, 1927.

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Appnatiqn mea recenter 1, 1924. vserial Np. 753,212.

` This invention relates to multiple-jet con densersfandan object ot" the invention is to pro'videa condenser of this "type which is comparatively" simple in construction, Vand canj'cjonsequently be manufactured 4and installed at il comparatively low cost with respect to the multiple-jet condensers of approved type now on th'eimarket.

Another object of this invention is to provide,`in`a multiplejet condenser as speciiied, simple, practical vacuum'ibreaker construe'- tion which is utilized a safeguard against any possible flooding oi' thecondenser Vchamber and exhaust line in the eventot 'failure of the injection of water supply.`

More specifically, the invention comprehends the provision of an injector, which is supplied by water under pressure, the said water entering the condenser in a plurality of circun'iterentially spaced streams,`all of which streams or jets ycombine or vunite at highy velocity in ithe throat ofthe condenser and create a suction land vacuum. through the condenser, passing from thethiroah'aend drawing themix'ture ot'steam and water,` as well as air and noncoudensible gases into a suitable discharge or hot well. i

4Other objects'of the invention will appear inthe following detail description, and in the accompanying drawings wherein "Figure 1 isa vertical longitudinal section through the improved multi-jet or' low level condenser.

yFigure 2 is an enlarged detail v'sectional view,'sho\ ving a part oi the vacuum breaker valve construction, and the fluid seal 'over one of thel valve heads. i Figure 3 i's'a horizontal section on the line 3-3 of Figure 1.

leferringmore particularly to the drawings,`the improved'low level jet `condenser compriseswan inlet'head or body 1 which is attached to the main substantially frustrecoiiical body 2 ofthe condenser in any suitable manner, such as .by `means of bolts x3. The 4head/.1 has a steam tentrance 11 therein which raligns axially' vwith the body 2. The steam inlet which is adapted to have connection with the steam exhaust ot any suitable mechanism, is separated from the water chamber 5 within the head 1 by a wall 6, and the water under pressure enters the water chamber 5 through a side inlet 7. A jet carrying disc 8 is positioned between the head 1 and body 2, and it hasan ann ar rim 9 forinedon it's upp'erinne'r edge 'which lits into 'a groove 10 formedin the tlower end of the wall hoto provide'a Afluid tight' cn nectionfbetw'een the disc 8 and Wall 6.""'A plurality of jet nozzles 11 'are ca'r'ried by and extend tli'rough'the disc 8L at circumferentially 'spaced' 'points and" these jet [nozzles open Aout into" tliechambendn relatively' wide mouths', and the bbresot thef'noiz'les are constrictedtowards their outlet. lBy constricting the bores'of the nolzzles, the velocity'of the luid'passing therethrough is increased. i The water, whichjis delivered v under pressure to the chamber jpasses downwardly, through lthe nozzles '11: inra plurality of jets, at circui'niereixitially spaced points, andas the jets `11 are Apositioned at acute angles to the axis of tlie'lbody 1, and with their axes in parallelismwith the sides oi the body 2, the jets will converge at thev lower or constricted end ofthe body 2 and pass in a single unitary stream through the throat 12.

substantially semi-spherical Vbaiile 14 is supported at the entrance of the steam into tlie'body 2,' by Ya plurality 'of rsuitable supl poi-ting lugs 15 which project inwardly from the ring 8 as clearly shown vini Figure' 1 of the drawings'. spherical baille '14 has its' convex 'surface facing the steam inlet!! and the steam entering the condenser will be deiiecte'd' out vot its straight path by the baiiie 14 and directed outwardly towards the jets of `water"asfin-` dicated at 16. t The' force otV the jets acting onthe steam'andthe deflecting of the Vsteam by the balde-14, together with theforce of thev water rushing through the body2 and through the throat 12, will create a suction' which will draw the condensate andiwate'r as well as air or any non-condensible 'gases outwardly through the throat causing a mixing of the various tluids in the/lower mixing portion of the body 2.

'The throat 152,V has a flared'inlet connection 17 which is'connec'ted in any suitable manner to the lower end of the body 2 and a rustroconical mouth 18 is positioned in the flared portion 17 and forms an entrance or inlet to the throat 12 from the interior of the body 2. The bore 19 of the mouth 18 gradually flares, in uniform curvature, to its inlet, and the maximum diameter of the The lsubstavntially seinimouth is greater than the diameter of the stream of the combined jets 16, so as to provide a gradually decreasing space in the mouth for receiving the steam and permitting the mixing of the steam with the stream of water as it passes into the throat 12 at which time the condensation of the steam is practically complete.

It is understood that the throat 12 may discharge through a flared outlet 20 into a hot well (not shown) of approved type used in connection with condensers.

A vacuum breaker structure is provided as a safeguard against any possible flooding of the condenser chambers within the body 2, and the exhaust line, in event of the failure of the means for removing the water. The vacuum breaker structure includes a Hoat valve structure embodying a float 21 which is attached to the lower end of a valve stem 22 and rests in the auxiliary chamber 23 formed at one side of the body 2. The chamber 23 has inlet and outlet communication with the interior of the body 2 or with the condenser chamber through Vsuitable openings 24 and 25.

The housing 26 which forms the chamber 23 is provided with an inwardly extending portion 27 having atmospherical communication and which inwardly extending por tion is provided with a pair of vertically aligning openings 29 having communication with the interior oi 'the chamber The openings 29 have valve seat forming collars 30 threaded therein against which the valve discs 3l and 32 seat. Water seals about the valves 31 and 32 are provided by upstanding ribs 32 formed on the collars 29. The ribs 32 are spaced from the perimeter of the valve disc 3l and form pockets or wells for receiving condensation to provide a water seal about the valves. An inlet or test plug 33 is threaded into the housing 26 to permit access to the interior of the chamber 23, and to the valve 3l when desired. In case of failure of the means for removing the water, the accumulation of fluid in the chamber 23 will cause the float 21 to rise, and moving upwardly, it will unseat the valves 31 and 32, causing these valves to open and admit air into the cham` ber 23 and from chamber 23 into the condenser chamber or interior of the body 2, thereby breaking' the vacuum and pre-venting flooding of the condenser chamber.

From the foregoing description taken in connection with the accompanying drawings, it will be apparent that the jets 16 practically form a wall about a central pocket of steam and while in the drawings the jet nozzles l1 are shown as spaced so as to provide individual jets, it is to be understood that they may be placed close enough to form practically a complete wall of water about the central steam pocket.

It is to be understood that the cross sectional area of the condensation chamber within the body 2 is directly proportionate to the volume of vapor at any given point and this feature in conjunction with the placing of the jets 16, provides a low level jet condenser in which the fluid to be drawn and condensed, is placed within the drawing or condensing fluid or material, resulting in a maximum drawing and condensing action.

lVhile we have described what we deem to be the most desirable embodiment of our invention, it is obvious that many of the parts may be varied without in any way departing from the spirit of ouiI invention, and we therefore do not limit ourselves to the exact details of' construction herein shown nor to anything less than the whole of our invention limited only by the appended claims.

1. In a jet condenser a casing, a water box at the upper end of the casing, a plurality of jet nozzles carried at the bottom of the water box and inclined to direct a multiplicity of jets in converging lines toward the outlet of the casing, a steam inlet centrally ol said nozzles and arranged to direct steam within the space interiorly of the plurality of jets of water from said nozzles.

2. In a jet condenser a casing, a water box at the upper end ot the casing, a plurality of jet nozzles carried at the bottom of the water box and inclined to direct a multiplicity of jets in converging lines toward the outlet of' the casing, a steam inlet centrally of said nozzles and arranged to direct steam within the space interiorly of the plurality of jets of water from saidl nozzles, and a baille disposed within the steam inlet and presenting a convex surface to the incoming steam for directing it against the inner walls of the water jets.

In testimony whereof we allix our signatures.

RANDOLPH E. S. GEARE. REIDAR M. NORSTROM

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