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Патент USA US2136087

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Nov. 8, 1938.
2,136,087
W. F. SCHROTH
HEAT EXCHANGE APPARATUS
Filed Feb. 16, y1957
'2 Sheets-Sheet l
22
30
WIT/V555.'
'
Nov. 8, 1938.
w. F. scHRoTH
2,136,087
HEAT EXCHANGE APPARATUS
Filed Feb. 16, _1937
2 Sheets-Sheet 2
3Y
/íMey q ¿Q7
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Patented Nov. s, 193s-
' 2,136,087? 'l
UNITED STATES
PATENT oFFicE
2,136,081 -
.
HEAT EXCHANGE ArPAaArus
William F. Schroth, Philadelphia, Pa., assigner to
C. H. Wheeler Manufacturing Co., Philadel
phia, Pa., a corporation of Pennsylvania
Applicants rem-um' 1e, 1931, sei-m N». 125,960
4 Claims.
5
(Cl. 257-43)
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Í
v
Extending horizontally from a tube sheet form
This invention relates to heat exchange appa
ratus of atype involving the flow of liquid through
a plurality of tubes of small diameter. Speciii
cally, the invention is applicable to surface
ing the inside wall of chamber I4 are tnbes22,
while, extending from the tube sheet forming the
condensers.
sheets may be formed of a single plate. y
_
inner wall of chamber I6 are tubes 24. The tube
26,> shown in Figure 3, which, though provided
take place through relatively small tubes, sedi-.
with reenforcing webs», nevertheless consists of a
single chamber by reason of openings 28 provided
ment, carried by the liquid or deposited therefrom
10 as change of temperature of the liquid takes place,
will collect within the tubes and particularly ad
jacent their entrance portions. Sediment oi' this
nature is distinct from scale in that it can be dis
turbed and removed if the ilow through the tubes
15 is caused to take place in an opposite direction.
Heretofore, accumulation of such-sediment has
necessitated shutting down of the apparatus to
permit removal of same.
It is the object of the present invention to pro
20 vide for removal of sediment of the type indi-.
cated above by providing a reverse ñow oi’ liquid
without shutting down the apparatus.
The above object and other'objects of the in
vention, lparticularly relating to details of con
25 struction, will- be apparent from the following
description read in conjunction with the accom
panying drawings in which:
Figure 1 is a side elevation, partly broken away,
of a surface condenser embodying the principles
30 of the invention;
.
Figure 2 is an end elevation of the same, also
partially broken away, showing the feed end of
the condenser;
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Figure 3 is an elevation of the opposite end
35 showing.particularly the return box construction;
Figure 4 is an enlarged sectional view showing
the arrangement ot gate controlling' means used
in accordance with the invention; and »
-
Figure 5 is a section taken on the plane indi
40 cated at 5-5 in Figure 4, but with the gate in its
upper position.
.
-
The condenser illustrated in the drawings com
prises a shell 2 provided with an upperinlet 4
for steam or other vapor which is to be condensed.
45 'I‘he condensate chamber 6 is provided with out
lets for the removal et the condensed liquid. Air
removal connections are indicated at 8.
At one end of the apparatus there is provided
in these webs.
'
10
Cooling water inlet and outlet conduits 33 and
32, respectively, are provided. The conduit 38
communicates through openings 34 and 36 with
the chambers I4 and I 6, respectively, while the _
conduit 32 is in communication with the same 15
chambers through openings `38 and 48. Each of
these pairs oi’ openings is controlled by means of
va gate 42, as illustrated in Figure 4. Each gate
42 is guided in vertical guide-rails 44 and is
arranged to provide liquid-tight contact with the 2o
guide-rails and the wall I2. Each of the gates is
provided with a plurality of racks 43 meshing'
with pinions 48 mounted upon a transverse shaft
50 extending through a suitable stu?ing box and
driven through gears 52 and 54 by a hand wheel 25 I
56. In large installations, instead of hand wheels
motor driving arrangements, remotely controlled,
may be used.
`
In normal operation the gate controlling the
inlet passage will be located in its upper position 30
and the gate controlling the outlet
e in its
lower position. As a result the coolingliquid will
pass through the opening 36 into the' ilrst pass.
consisting of tubes 24, thence through the box 28
into the second pass. consisting of tubes 22, 35'
whence it will ilow out of chamber I4 through
passage 38. It will be noted that this ñow will
provide counter-current action .between the in
coming steam or vapor and the condensing liquid. _
At suitable periods the gates on the two sides of 40
the apparatus are oppositely moved, with the
result that the chamber I4 will become the inilow
chamber and the chamber I6 the outflow cham
ber, so that the flow through the tubes will be
reversed and collected sediment will be washed 45
out through the outlet conduit 32. As soon as
such cleanout' has been effected, the gates may
be again restored to their original positions in
order to gain the advantages of the counter-now
a box I0 divided into upper and lower chambers
50 I4 and I6 by means o! a partition I2. Along the
vertical center line there is provided a reenforcing
ratus need not be closed down at any time for the
web I1 provided with openings I8 furnishing con
nection between the two sides oi the chamber I4,
and an opening 28 providing connection between
removal oi' the collected sediment, since the gates
may be moved simultaneously inl the space of a'
few seconds to provide reversal o! flow. It will
86 - the two sides of the chamber I8.
5
The tubes 22 and 24 connect with a return box
In heat exchange apparatus, such as surface
condensers, in which flow of liquid is caused to
arrangement.
It will be obvious that the appa- 50 y
- be clear that numerous variationsv may be made 55
2
3. Heat exchange apparatus including substan
in the speciiic embodiment of the invention with
out departing therefrom, also that this invention 'tially horizontal tubes arranged for the passage
is by no means limited to a condenser, but is therethrough of i‘lowing liquid taking part in
applicable to other cases of heat exchange appa
ratus in which sediment is to be removed from
tubes.
.
A
What I claim and desire to protect by Letters
Patent is:
'
`
1. Heat exchange apparatus including substan
tially horizontal tubes arranged for the passage
therethrough of flowing liquid taking part in the
heat exchange, upper and lower chambers, sep
arated by a. laterally extending partition, at one
end of the tubes, there being twovgroups of tubes,
one group communicating with the upper cham
ber and the other group with the lower chamber,
a common chamber for both groups of tubes at
the other end thereof, means for passing ñuid
through said apparatus successively about the
groups of tubes for heat exchange with liquid
in the tubes, liquid supply and liquid discharge
the heat exchange, upper and lower chambers,
separated by a laterally extending partition, at
one end of the tubes, said laterally extending
partition having a depressed central portion to
provide a lower chamber havingfaide portions ex
tending upwardly-'above the central portion of
the lower chamber to form a concavity receiving 10
the lower central portion of the upper chamber,
there being two groups of tubes,- one group com
municating with the upper chamber and the other
group with the lower chamber, a common cham
ber for both groups of tubes at the other end 15
thereof, means for passing iiuid through said ap
paratus successively about the groups of tubes for
heat exchange with liquid in the tubes, liquid
supply and discharge conduits, and means for
alternately connecting said upper and lower 20
Ochambers with said supply and discharge con
conduits, and means for alternately connecting ‘ duits to provide reversal of liquid ilow through
said upper 'and lower chambers with said supply the tubes, the connections of the discharge con-A
and discharge conduits to provide reversal of duit with both‘of said chambers being at one
liquid iiow through the tubes, the connections of side of said chambers at the uppermost portions
the discharge conduit with said upper chamber thereof, and ’the connections of the supply con
being with the uppermost portions thereof to duit with both of -said chambers being at the
facilitate the removal of air therefrom, said last opposite side of said chambers at the uppermost-
mentioned means comprising upwardly sliding
valves arranged to control openings above and
below said partition, one controlling ñow into bothA
said chambers from the supply conduit and the
other controlling ñow from both chambers into
the discharge conduit, said discharge and supply
conduits being located adjacent the opposite ends
of said partition, so that cross ñow of liquid
portions thereof.
.
,
4. Heat exchange apparatus including substan $0
tially vhorizontal tubes arranged for the passage
therethrough of flowing liquid taking part in the
heat exchange, upper and lower chambers, sep
arated by a laterally extending partition, at one
end of the tubes, said laterally extending partl
tion having a depressed central portion to pro
through'said chambers may be provided when - vide a lower chamber having side portions ex
tending upwardly above'the central portion of
said-valves are located in intermediate positions.
the lower chamber to form a concavity receiving
2. Heat exchange apparatus including substan
tially horizontal tubes arranged for the passage the lower central portion of the upper chamber,
therethrough of flowing liquid taking part in the there being two groups of tubes, one group com
municating with the upper chamber and the other
heat exchange, upper and lower chambers, sep
arated by a laterally extending partition, at one group with the lower chamber, a common cham
ber for both groups of tubes at the other end
end of the tubes, said laterally extending parti
thereof, means for passing ‘ñuid through said
tion having a depressed central portion to pro
apparatus successively about the groups of tubes
>vide a lower chamber having side portions `ex
tending upwardly above -the central portion of for heat exchange with liquid in the tubes, liquid .
the lower chamber to form a concavity receiving supply and discharge conduits, and means for
the lower central portion of the upper chamber, alternately connecting said upper and lower
chambers with said supply and discharge conduits 50
there being two groups of- tubes, one group com
municating with the upper chamber and the to provide reversal of liquid flow through the
other group with the lower chamber, a common tubes, said last mentioned means comprising up
chamber for both groups of tubes at the other wardly sliding valves arranged to control open
end thereof, means for passing iiuid through ings above and below said partition, one con
said apparatus successively about the groups of trolling ñow into both said chambers from the
tubes for heat exchange with liquid in the tubes. supply conduit and the other- controlling flow
liquid supply and discharge conduits, and 'means from both chambers into the discharge conduit,
for alternately connecting said upper and lower said discharge and supply conduits being located
adjacent the opposite ends of said partition atv
chambers with said supply and discharge con
duits to provide reversal of liquid flow through the uppermost portions of the chambers, so that
cross flow of liquid through said chambers may
the tubes, the connections of the discharge con
duit with both of said Achambers being at one be effected'when said valves are in intermediate
_side of said chambers at the uppermost portions
thereof,
'
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‘
positions.
WILLIAM F. SCHROTH.
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