close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2121537

код для вставки
June 21,
.
R_ w, CQGHILL
2,121,537
FURNACE CONSTRUCTION
Filed Dec.429, 1932
a
3 Shéets-Sheet l
,
-
INVENTOR
Robe/"f 14(609/7/7/
_
“Mag/12w,
‘
June 21, 1938.
2,121,537
R. w. COGHILL
FURNACE CONSTRUCTION
Filed D60. 29, 1932
3 She-ets-Sheet 2
‘g. 2.
x
3
/mm
NS
H5
6 M”
no
oo
o6
m
600
Z
N
m
5
9&00
W
Hm
0PA
M
INm7
5 we
7
05r
?
1
c0
%c
V£M”
Hcan@0 0
an"
M
y
w
,M
Qoi
m_
L
6W
a.9000
f
v i lY.a
o.
ON
8
o0,
um
w
M
au.
owc om
o o aw\M
Jx,\
I
w*
7\
5m
h.
June 21, 1938.
R.- W. COGHILL
2,121,537
FURNACE CONSTRUCTION
Filed Dec. 29, 1952
3 Sheets-Sheet 3
INVENTOR
BY 746W. 2., vJ
ATTORNE
-
2,121,537
Patented June 21, 1938
UNITED STATES PATENT. OFFICE
2,121,537
FURNACE CONSTRUCTION
_
Robert W. Coghill, New York, N. Y., asslgnor. to
‘corporation of Delaware
Alco Products, Inc., a
oplication December 29, 1932, Serial No. 649,298 _
(Cl. 196-110)
5 Claims.
a novel furnace construction in which the con
My invention relates to a furnace construction
and more particularly to a tube still for use in
vection heat section is independently supported
above the radiant heat section.
Other objects of my invention will appear from
Tube stills have been widely used in recent
6 years for the processing of hydrocarbon oils. the following description.
In the accompanying drawings which form‘
The tube stills which have been found to be
very efficient generally consist of a casing having part of the instant speci?cation and which are
a ?ring chamber. A bank of tubes adapted to to be read in conjunction therewith and'in which
absorb the radiant heat developed fromv the ?r , like reference numerals are used to designate
10
10 ing chamber is placed therein. A bridge wall like parts in the various views;
Figure 1, shows a perspective view of my fur
spaced from one end of the furnace serves to
- processing hydrocarbon oils.
nace construction.
de?ne a passageway in which a bank of tubes
Figure 2 shows a sectional elevation of a fur
adapted to absorb the convection heat of 'the
hot gases of combustion are placed.
nace construction embodying one mode of car
This con
rying out my invention and showing one method
15 struction is exempli?ed in many examples of the
prior art. In the types of construction known,
the hot gases of combustion must change direc
tion causing turbulence. Then, too, as the hot
gases give up their heat to the fluid being proc
of passing the ?uid being processed there
through.
\
Figure~3 is a diagrammatic view of a sectional
elevation of a furnace embodying my invention
showing another method of passing the 011 there
essed, their volume decreases. In order to com
pensate for this decrease in volume and main
through.
showing another method of passing the 011 there
provide a construction in which the cross sec
tional area of ‘the gas passage decreases in the
direction of the flow of the combustion gases.
I
Another object of my invention is to provide
a still construction in which the gas passageway
decreases uniformly in cross sectional area so
that a converging passageway is formed to main
tain the velocity of the combustion gases.
. Another object of my invention is to provide
a still construction having a novel and e?icient
manner of preheating the air going to my com
bustion chamber.
Another object of my invention is to provide
a furnace with a setting exposed to radiant heat
but permitting the uniform ?ring of said furnace
over substantially the length of the tubes.
Another object of my invention is to provide
a furnace construction having two radiant heat
sections partially separated by a partition wall
having independent burner controls so that the
heat absorption in each radiant section maybe
Another object of my invention is to provide
a furnace construction having a double radiant
heat section employing the convection gases gen
erated in both sections in a common passageway
in which the convection tubes are positioned.
Another object of my invention is to provide
25
through.
One object of my invention is to provide a
still construction in which the hot combustion
gases will have a substantially straight line ?ow,
varied independently.
20
'
Figure 4 is a diagrammatic view of a sectional
elevation of a furnace embodying my invention
tain a uniform velocity or to obtain an increased
velocity in the convection section, I propose to
thus eliminating turbulence.
}
In general my invention contemplates the pro
vision of a furnace setting having in general an
A-shaped or trapezoidal cross section with the
base of the A at the lower portion so that the
cross sectional area of a plurality of planes par
allel to the base would decrease in an upward
direction. The radiant heat absorbing tubes are
positioned within the casing in the lower por
tion thereof.
The convection heat section is
likewise of a progressively decreasing cross sec
tion and‘ is mounted above the radiant heat sec
35
tion in a casing which is supported independently
of the radiant heat section casing by means of
girders or the like exercising‘ thrust directly
against the ground. Above the convection heat 40
section I provide an air preheater adapted to
heat the air used for combustion in the com
bustion chamber by heat exchange with the com
bustion gases 'goingto the stack. If desired, I
may provide a partition wall at the lower part 45
of my casing to divide it into two sections._ These
sections may be independently ?red.
More particularly referring now to the draw
ings, the furnace casing I which may be of
any suitable construction, is provided with in 50
clined side walls 2. A partition wall 3 may divide
the casing l into two sections, as can be readily
seen by reference to Figure 2. The sections
have suitable heat generating means such as oil
burners t and 5. If desired, auxiliary burners 55
2,121,537
2 .
6 and ‘I may be employed. While I have shown
an oil burning furnace, it is to be understood
that, if desired,‘ a coal or gas burning furnace
heat tubes [3, H, and 9, and be withdrawn
may be used.
lated to maintain different temperatures in each
The walls of the furnace casing
are lined with tube banks 8 and 9, adapted to
absorb the radiant heat generated.
Likewise,
the ?oor of the furnace is provided with radiant
heat absorbing banks In and II as are the par
tition wall sides with tube banks l2 and IS.
10 The tube banks 8., l0, and i2 are connected in
series as can be readily seen by_.reference to
Figure 2 to form a radiant heat absorbing sec
tion on one side of the partition wall 8. Like
wise, the radiant heat absorbing elements 9, H,
15 and I3 are connected in series to form another
radiant heat section on the opposite side of the
partition wall as can be readily seen by refer
ence to Figure 2. A secondary casing 20 is posi
tioned above the main casing I. This casing is
20 supported by any suitable construction by means
of a plurality of girders 2| and 22, directly from
the ground.
The girders may terminate in suit- ‘
able concrete piles‘ 23 and 24. The sides of the
secondary or convection section casing 20 are
25 provided with converging side walls 25- and 26.
A bank of convection tubes 21 is positioned in
through pipe 83. With this type of ?ow, the '
independent ?ring points 4 and 5 may be regu
radiant section depending on the type of process
desired. It will be noted that in general the
direction of ?ow of the oil being processed is
concurrent in the radiant heat bank and counter-"
current in the convection bank in the-form of
construction shown in Figure 2.
'
-I may charge one stream through the entire
upper section of the convection bank and the
other stream through the entire lower section
of the convection bank as can be readily seen 15
by reference to the ?gure. In this form of con
struction I am enabled to charge two different
stocks each having a different inlet temperature
and ?re them to independent outlet temperatures.
Another form of construction is shown in Fig
ure 4 in which the direction of oil flow is indi
cated by the arrows. It is countercurrent in
the convection section and both countercurrent
and concurrent in the radiant heat section. ‘
It is to be noted in my construction that the 25
tubes of the radiant bank and the convection
the convection section. This convection section
sections are parallel to each other so that sub
is adapted to receive the hot products of com
stantially no change in the direction of the ?ow
of the ?ue gas need take place.
- bustion coming from both the radiant heat sec
30 tions as will be readily appreciated by reference
to Figure 2. Interposed in» the convection tube
bank I may, if desired,-provide a bank of tubes
30 for the superheating of steam as is well known
in the art. Above the convection tube bank 21
I provide an air preheater section 40. A stack
10
Inthe form oLconstruction shown in Figure 3,
It will be readily appreciated that my con 30
struction has many advantages. I am enabled
to obtain a straight line ?ow of combustion gases
.and eliminate turbulence. I am enabled to main
tain a uniform speed of ?ow or obtain an in
creased speed of ?ow of the combustion gases 35
in the convection section. I employ the heat
generated in the combustion chamber to the
3|’ is connected above the convection heat sec
tion to discharge the gases to-the atmosphere.
~Spaced from the sides of the main casing I, I maximum advantage by preheating the air and
provide sheathing 50 and 5|. It will be ob
absorbing the heat from the furnace walls in
40 served that the walls v2 of the furnace casing l
my jacket'construction. I am enabled to pro 40
and the sheathing 50 and 5| form jackets 52 .vide a flexible control in processing di?‘erent
and 53. The lower ends of these jackets com
types of hydrocarbon oils.
municate to the burners 4 and 5 and supply air
It will be understood that certain features and
thereto. Air is fed to the jackets 52 and 53
sub-combinations are of utility and may be 'em- ,
45 from a pair of ducts 54 and 55 connected with
ployed without reference to other features and 45
suitable air preheaters 40. Air enters a suitable sub-combinations. This is contemplated by and
intake 55 which may be equipped with a blower is within the scope of my claims. It is further
(not shown) for forced draft and passes through obvious that various changes may be made in
heat exchanger 40, through duct 55, through
50' jacket 53, to burner 4. The heat from the fur
nace walls 2 serves further to preheat the air
passing through the jackets, as will be apparent
from the above description. The side walls 2
of the main furnace I may be inclined to any
65 desired angle.
Depending upon the heat inten
sity in the combustion chamber, it may be found
that it will be advantageous to use walls of
curved construction or several angles rather than
a single plane surface.
' In operation the hydrocarbon oil being proc
essed may be introduced through suitable charge
lines 50 and 10 to the convection bank 21 which
may be split into two independent adjacent banks
and ?ow downwardly through small combination
65 convection and radiant heat banks GI and ‘H
60'
through cross connections 62 and 12 to the ra
diant heat banks l3 and I2. It is to be under
stood, of course that the cross connections 62
and 12 may be‘ placed without the furnace if
desired. vThe type of ?ow now being described
is illustrated in Figure 2 of the drawings. After
passing through radiant heat tubes l2, l0, and 8,
the oil which was charged at 710 may be with
drawn through pipe 13. The oil which was
charged to pipe 50 will pass through radiant
details within the scope of my claims without
departing from the spirit of my invention. It
‘is, therefore, to be understood that my invention
is not to be limited to the speci?c, details shown
and described.
~
Having thus described my invention, what I
claim is:
1. A tube still for processing hydrocarbon oils
including in combination a setting, a partition
wall within said setting, ?ring points on oppo
site sides of said partition wall, radiant heat
tubes within the setting disposed along opposite 60
sides of the partition wall whereby a pair of
radiant tube sections are formed, a common
passageway for conducting the hot combustion .
‘gases, of both radiant heat sections to the at
mosphere without substantial change in direc
tion and convection tubes positioned within said
passageway above said radiant heat tubes.
2. A tube still for processing hydrocarbon oils
including in combination a setting, a partition
wall within said setting, ?ring points on oppo
site sides of said partition‘ wall, radiant heat
tubes within the setting disposed oppositely of
the partition wall in planes parallel to the sides
thereof whereby a pair of radiant tube sections
are formed, a common converging passageway 75
$3
for conducting the hot combustion gases of both
radiant heat sections to the atmosphere without
substantial change in direction and convection
the other of said radiantly heated banks, and '
means for separately charging incoming oil to
said convection banks and separately removing
outgoing oil from said radiant banks.
tubes positioned within said passageway above .
4. In a still for processing hydrocarbon oils
said
radiant
heat
tubes.
having a setting having a progressively smoothly
Cl
3. A tube still for processing hydrocarbon oils, decreasing cross sectional area in the direction
including in combination a furnace setting, a
of the ?ow of the hot furnace gases, a housing
partition wall Within said setting forming a plu
rality of combustion chambers with said setting,
ll) a common combustion gas passageway formed
by said setting above said chambers, a bank of
tubes adapted to be heated mainly by radiant
heat disposed within said setting at one side
of said partition Wall, a second bank of tubes
adapted to be heated mainly by radiant heat dis
posed within said setting vat the opposite side
of said partition wall, a bank of tubes adapted
to be heated mainly by convection heat disposed
in said passageway and connected to one of said
radiantly heated banks, a second bank of tubes
for said setting positioned in spaced relation
thereto, said housing and said setting adapted 10
to form a jacket and means for passing air
for the combustion chamber through said jacket.
.5. A still including in combination a setting
having a progressively smoothly decreasing cross
sectional area in the direction of the ?ow of the
hot furnace gases, sheathing spaced from said
setting externally thereof, said sheathing and
said setting forming a jacket, means for pre
heating the air for the combustion chamber and
means for passing the preheated air through the 20
chamber.
adapted‘ to be heated mainly by convection heat jacket to the combustion
ROBERT ‘W. COGHILL.
disposed in said passageway and connected to
Документ
Категория
Без категории
Просмотров
0
Размер файла
529 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа