US1224310A - Barometric condenser. - Google Patents

Description

n.1. MESTAAc. L, w. TRINKS. BAROMETRIC CONDENSER.

APPLICATION FILED MAYIS, |916.

,224,31 @e l Patented May l, 19171 iran eran CHARLES J. MESTA AND CHARLES L. W. TRT NKS, 0F PITTSBURGH, PENNSYLVANIA, ASSIG-NORS T0 MESTA MACHINE COMPANY, OF PITTSBURGH, PENNSYLVANIA, A

CORPORATION 0F PENNSYLVANIA.

BAROMETRIC CONDENSER.

Specification of Letters Patent.

Patented May i, fait.

Application led May 15, 1916. Serial No. 97,497.

lwhich the following is a full, clear, and eX- act description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a sectional elevation of a barometric condenser embodying our invention; Fig. 2 is a plan view of a portion of the weir; F Fig. 3 is a section on the line lll-lll of Our invention has relation to barometric condensers and more particularly to an improved water deiector or weir for use in such condenscrs.

ln barometric condensers, it is desirable to have aI long fall of water at a relatively high velocity. ln the operation of 'these condens-ers, it is well known that the steam rushes to the cold water and is condensed thereon, but that the air which is contained in the steam is held against the water and blankets it. lt is therefore desirable to have the water move with suiiicient velocity to take the air with it by viscous drag, and a sufficient length and diameter of water fall shouldV be provided not only to condense all the steam,y but also to bring the temperature of the leaving water up to the temperature of the incoming steam. rlhe air which is carried to the bottom of the condenser can not be removed with the tail water, unless a high air pressure is permitted to accumulate at the bottom. This is-undesirable because high air pressure means low vapor pressure, a cold bottom, no heat transmis sion at the bottom, and a generally inefficient condenser. It is consequently .necessary to remove the air by a large capacity pump. r

ln constructing condensers in accordance with the foregoing, we have found that it is dicult in using the ordinary type of weir to make the water fall in a cylindrical sheet. in the first place, the upward suction of the air pump produces a lower pressure in the center of the, fall than in the space surrounding it; and second, the pulsations in the level of the water above the Weir tend to throw the water inward by asplashing action. The immediate result is that the water, 'instead of falling in a cylindricalv sheet, falls in a truncated cone. rlhis inf creases the pressure'diiference between the inside and the outside of the fall and aggravates the difficulties. The final result is l that air can not pass out freely and the cooling surface is reduced to such an extent that the condenser becomes ineilicient.

Our invention is designed to provide a simple weir or deflector which will greatly increase the eciency of condensers of this type and also increase their capacity.

Referring to the accompanying drawings, in which we have shown a preferred embodiment of our invention, the numeral 2 designates the condensing chamber of a barometric condenser having a water inlet 3, a tail pipe connection 4, an upper chamber 5, having a connection 6 leading to an air pump, and internal baiiies 7, of any usual or suitable character.

ln accordance with our invention, we provide a lower baileor weir consisting of the curved ring 8, having a cylindrical wall 9, within the same and separated therefrom by a relatively narrow slot or opening 10. The ring 8 has a convex upper surface with a downwardly extending lip 11, which is substantially parallel with the cylinder wall 9.

The ring may be held in place by the narrow connecting ribs 12, placed at intervals.

The action of the ring is to start the water downward with a fairly high velocity, so that slight diEerences of pressure do not have an opportunity to crowd the water toward the center. Furthermore, the water is positively guided in a downward direction, so that any surging or pulsation of the water level above the weir can not affect the direction of ow. The result is that the water falls in a substantially true cylindrical sheet, as indicated in dotted lines in Fig. l.

The upper edge of the cylindrical wall 9 is preferably made low enough so that should the slot or opening 10 clog at one or more points, the water may How over the inner edge of this wall. Clogging, there fore` will not cause a shutting down of thc condenser, but will only slightly impair its efficiency.

Preferably, the width ofthe free annular opening 10 between the ring 8 and the wall 9 -is about one-third of the. radius of curvature of the curved ring 8 and about one-fifth of the height of the internal wall. The baiie or delector 7 next above the weir is preferably of a character to deflect the water outwardly into the trough formed at the peripheral portion of the weir and between it and the wall of the upper chamber 5.

We do not desire to limit ourselves to the exact construction of the weir or deflector which we have herein shown and described, it being obvious that various changes can be made in the details thereof without departing from the spirit and scope of the invention as defined in the appended claims.

We claim:

1. A water deflector or weir, consisting of a.

ring or annulus having a convex upper surface and having a cylindrical wall inside of the ring and separated ytherei'rom by a relatively narrow opening, substantially as described.

2. A water deflector or weir, comprising a ring having inner and outer substantially parallel flow-guiding vertical walls separated from each other by a flow opening, substantially as described.

3. A water deiector or Weir, consisting of an inner cylindrical wall and a surrounding ring separated from the wall by a relatively narrow slot or opening, said ring having a convex upper surface and terminating in a downwardly extending lip or flange, subtially as described.

4. Acircular weir having a substantially,

circular flow opening between inner and outer walls, substantially as described.

5. .A circular weir having a substantially circular flow opening between inner and outer walls having substantially vertical guide portions, substantially as described.

6. A Water deflector or weir having an' annular flow slot for a normal rate of flow and having another flow channel for abnormal flows, substantially as described.

7. In a steam condenser, the combination with an upper baffle or deflector arranged to throw the water outwardly, of a lower deflector consisting of an outer relatively flat ring and an inner deep ring with an opening between said rings, substantially as described.

8. In a steam condenser, the combination with an upper baffle or delector arranged to throw the water outwardly, lof a lower delector consisting of an outer relatively flat ring and an inner deep ring with an opening between said rings, the lower edges of both the inner and outer rings being in substantially the same plane, substantially as described.

9. A weir or de'lector having a cylindrical internal wall and having a curved ring portion becoming cylindrical at its inner, bottom edge, an annular opening between the said inner wall and the said ring portion, the width of said opening being approximately one-third of the radius of curvature of the radial profile of the curved ring portion, and about one-fifth of the'heiglit of the internal wall, substantially as' described.

In testimony whereof, we have hereunto set our hands.

' CHARLES J. MESTA.

CHARLESL. W. TRINKS.

Witnesses:

Gr. E. TowNsEND, J. R. BERG.

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