US1628487A - Surface condenser - Google Patents

Description

A. BA NC EL spa-mom (EONDENSER Files! Nov INVENTOR. 1A

and.

H15 ATT NEY.

Patented May It), 1927.

UNITED sures PATENT, OFFICE...

raur. a. Barman, or nn'rmx, new use, assrenon TO mennsoLn-mnn comraw, or maszr crrv, NEW annsnx, a coaronarron or New JERSEY.

suaracn connnnshn.

Application filed. November This invention relates to surface condensers and more particularly to that type of 'condenser in which condensation is effected by means of water conducting cooling tubes. the object of the invention is to effectively distribute steam to be condensed to the tubes in uantities proportionate to their steani condensing capacity. Other objects will be in part obvious and in part pointed out hereinafter. ,1

In the drawing in which similar reference characters referto similar parts.

Figure 1 is a vertical longitudinal section through .a condenser constructed in accordance with the practice of the invention, a section being taken along the line l1 of Figure12, looking in thedire'ction of the arrows, an

Figure 2 is a central cross section taken along the line 2-2 of Figure 1 looking in direction of the arrows. Q

Referring .to the drawing the'condenser comprises a shell A having a steam inlet B and an outlet for condensate and uncondensible gases relatively remote from the steam inlet.v Interposed between the steam inlet B and the outlet 0 for unconden- 'sible see, a plurality of-water conducting tu bes-D arearran ged transverse to the direction of steam flow from the inlet B. The tubes Dare sealed from the casing A by means of tube sheets E at either end of the casing and are su lied with water from -'an inlet-water box After having absorb'ed the heat from the steam, the water from the tubes D is discharged into an outlet'water box G. j

In a condenser of the type described, the tubes Dare progressively warmer from the water inlet end adjacent the water. box F to the endadjacent the water'outlet box G for the reason'that the water in the tubes D keeps on absorbing heat from its entrance 'into t e-tubes 'Duntil it leaves the tubes. 5 This results in. une ual specific steam con- :dens' gcapacities a ong thelength of the tubes The tendencyfof the steam is to be complete] condensed at the coolerends of the tubes fore reaching the lowest bank,"

which'is to say that the tendency of the steam isto penetrate less deeply invertical sections nearer the water inlet end than in thosejsectionsnearer the water outlet end having less steam condensing or heatv ab-- i sorbing capacity. The tendency of the 20,1926. Serial in. 149,052.

is to leave aportion' of the condensing tubes To this end, means is rovided to distribute thesteam to the sur ace of the tubes D throughout the length of the condenser in proportion to the Specific steam condensing I capacity of the tubes. This means comprises a plate H preferably parallel to the rows of tubes D and in this instance supported above the tubes D by means of suitable channels J attached to the tube sheets- E and to the side wallsof the casing A.

The plate H is perforated as by means of apertures K relatively'larger near the water inlet end of the tubes D then at the water outlet end of the tubes. Preferably the size 10f the apertures K is graduated and decreases progressively inaccordance with the decrease of specific steam condensing capacity of the tubes D. Any suitable form of aperture K may be provided, it being desirable. merely that the opening er unit ofarea decrease in the direction of t e plate) from the inlet water box F water outlet box G, I

Preferably a tube f pport L is provided intermediate the ends of the condenser which in additiOn. to preventing undue vibrationv or sagging of the tubes-D prediagonal current flow of steam from vents the upper. cooler'ends of the tubes D toward the lower warmer endsjof the tubes.

toward the In this nner Sam is distributed in larger quantities .t 'the cooler ends of the I .tubes D in which the specific steam conden'sing capacity is greater than to the warmer portions'where the vertical steamv I condensing capacity 'is less.

mbefore referred to.. a I claim:

L'A surface condenser comprising acas Thus by the hove construction complished, amdng others, the objects heresaid casing interposed between said inlet and said outlet having portions of unequal specific steam condensing capacity, and means including a perforated plate having openings of graduated size to cause the steam to pass to said portions in proportion to. their specific steam condensing capacity.

2. A surface condenser comprising :1 casing having a steam inlet and an outlet for air or uncondensible gases, a plurality of water tubcsinterposed between said inlet and said outlet and having portions of un equal specific steam condensing capacity,

anda perforated plate interposed between said steam inlet and said tubes having larger openings adjacent those portions of the tubes having greater specific steam condensmg capacity. I

3. A surface condcnser'comprising :1 casoutlet, a water inletifor said tubes at one.

end of said casing and a water outlet at the other end of said casing resulting 1n greater specific steam condensing capacity at the inlet ends of said tube than at the outlet ends and a plate interposed between said steam inlet and said tubes having apertur'es of progressively decreasing opening per unit of area 111 the dn'cctlou from the water inlet to the wateivoutlet to distribute the steam to the water tubes in proportion to their specific steam condensing capacity. In testimony whereof I have signed thls specification.

\ I PAUL A. BANOEL.

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