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Патент USA US2408085

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Sept. 24, 1946.
Filed Sept. 13, 1941
a Sheets-Sheet 1
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Sept. 24,‘ 1946.
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Filed Sept. 13, 1941
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Sept. 24, 1946.
' 2,408,084
Filed Sept . l3, _ 1941
3 Sheets-Sheet 3
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Patented Sept. 24, 1946
> James Woodward Martin, Dallas, Tex., assignor to '
Lone Star Gas Company, Dallas, .Tex., a corpo
ration of Texas
Application September 13, 1941, Serial No. 410,766
5 Claims.
(C1. 62-1)
heating purposes ‘is supplied from an outside
'This invention relates to improvements in va- -
porizing devices, and more particularly to a va
porizer adapted for vaporizing lique?ed hydro
The embodiment illustrated in Figs. 1 to 3 in
clusive is quite similar to the structures disclosed
carbon gases, such as propane, butane, proylene,
butylene, etc., or mixtures thereof.
5 in my patent, but employs a heating device ar
ranged at the bottom of the main storage tank.
In my Patent No, 2,084,297, I disclosed embodi
ments of a vaporizing apparatus, and set out cer
In this embodiment, 8 designates a main tank
or container for any liquid thatis to be heated.
tain objects relating to the treatment of lique?able
If it is used for lique?ed gases, it may be pro
hydrocarbons such as propane, butane and their
vided with a safety valve 9 and a ?ll valve In,
mixtures. The present apparatus have the same
the‘latter being arranged in a suitable housing
objectives, and may be used in the handling of
I l secured to the bottom of the tank. Vapor from
propylene and butylene which were not speci?
the vapor space I2 of such tank can be discharged‘
cally mentioned in my patent.
through a pipe I3 which leads from the upper
- Another object of the present invention is to
supply a vaporizing device that may be employed 15 portion of the interior of the tank through the
bottom thereof, and is provided with- a main
in a most e?icient manner for heating various
vapor valve l 4. Vapor, after passing through the
liquids, including water, whether for hot water
valve, will ?ow through a conventional regulator
or for steam generation. Naturally, if the liq
l5 for maintaining on the valved service line IS
did to be heated is not combustible, the fuel em
ployed for heating can be supplied from an out-' 20 a reasonably constant pressure .of any desired
value. less than the pressure in the tank 8.’ A
side source.
> ‘
service ‘safety relief valve I1 is interposed in
My new vaporizer, or heat exchanger and com
the service line between the regulator and’ the
bustion system has the advantage over the origi
nal ones, in that'it cansbe constructed separate . service cock l8; and a pressure gauge l9‘ and,
fromqthe liquid container,- and on a production i) removable cap 20 are preferably connected to a
line, using stamped parts and assembling such
branch 2| of the vapor pipe 13.
A pipe '22 having a valve 23 leads from the
parts with a welding arc, gas torch, or by braz
ing or soldering, etc., or using castings or any
pipe 16 and branches out into a pilot tube 24 and
a pipe 25; the‘ latter leading to a thermostatical
other suitablemethod of construction: and as
sembly. It will therefore be understood that it 30 ly controlled valve or pressurestat 26 which con~
is a further object of this invention to supply a
trols'the. passage of vapor'to‘ a conduit 21 lead
vaporizer that can be manufactured at less ex
ing toa main burner 28. If the part 26, con;
pense than the ones disclosed in my patent.
nected to pipe I3, is a pressurestat, it will be
With the foregoing objects outlined and with‘
understood that as soon as the pressure of the
other objects in view which will appear as the
vapor in the pipe l3 decreases sufficiently, the
description proceeds, the invention consists in
valve between the conduits 25 and 2'!v will open,
allowing vapor to flow to burner 28, sothat the
the novel features hereinafter described in de
tail, illustrated in the accompanying drawings,
?ame from the pilot 29 will ignite the vapor is
.qsuing through the .burner 28. .Obviously, the
and more particularly pointed, out in the ap
pended claims.
pressurestat or thermostat may be connected di
In the drawings:
rectly to the tank 8 to allow either the pressure
or ‘temperature of the liquid or vapor to be used
Fig. 1 is a vertical sectional view, partly in
to control the v?ow of vapor to the burner.
elevation, and partly broken away, of an em
bodiment of theinvention.
Fig. 2 is an enlarged end view of a portion of
the same, with the draft equalizer removed.
Fig. 3 is an elevation of an end plate forming
part of the apparatus.
Toignitethe pilot, a spark-plug igniter, 30 is
7 provided, which, by means of a battery and spark
coil (not shown), causes a spark to jump from
the electrode on the spark-plug across the spark,
gap to the top of the pilot, so as to ignite the
Fig. ‘leis a vertical sectional‘ view of a portion
a modi?cation.
Fig. 5 is an end view of the same.
vapor issuing therefrom. Obviously, any other
suitable safe means may be employed to ignite
the pilot.
Fig. 7 is a vertical sectional view of another
The pilot is located in a certain relationship
toithe burner (Fig. 1), so that in addition to
providing the heat to keep the safety device open.
modi?cation, in ‘which the fuel employed for
and to effect ignition of the vapor as it'passes.
Fig. 6 is an elevation of an end plate forming
part of the structure illustrated in Fig. 4.
out of the burner, it also keeps the burner bar
rel hot, thereby maintaining a draft through the
inside of the barrel itself. (The barrel is that
discharged into the stack 3| will induce air for
combustion to enter the inlet 50 of the U-shaped
tube so that it may ?ow into the air passageway
portion of the burner into which the vapor dis
charges and in which the primary air and the
around 2000 degrees) and hence extremely light
vapor mix.)
in weight as compared to air at normal tem
By so doing, and when a modulat
39. The gases in this stack are hot (somewhere
perature, and their velocity is great as well as is
ing or throttling type control valve, either pres
their lifting power. The ?ame in this stack
surestat or thermostat, is used, and when this
serves as a pump, pushing the products of com
control Valve just barely opens or is nearing the
closing off position, allowing but a small ?ow of 10 bustion through the heat chamber 34, ?ue 42, and
the outlet 49, and thence out through the aper
vapor into the burner barrel, which ?ow has
ture at the top of the draft equalizer, and at the
no velocity, said draft will cause even such a
same time sucks in or induces fresh air through
slight amount to rise to the combustion end of
inlet 50 and through the passageway 39 into the
the burner barrel and ignite from the pilot. If
burner compartment.
this draft is not maintained within this burner
The draft equalizer 43 serves to prevent any
barrel, heavy vapor (such as lique?ed petroleum
outside atmospheric disturbances such as wind
gas vapors) would ?ow out through the ori?ce
storms or other storms, etc., from altering the
in the lower end of barrel and accumulate in
direction of ?ow of the ?ue gases and the air
the bottom portion of the burner compartment as
unburned vapors. In time, a su?icient amount 20 and from extinguishing the pilot and/or burner
of such unburned vapors will accumulate and
The inner end of the heat chamber 34 is formed
become ignited from the pilot, ?lling the burner
by an end plate 5! of the housing II, and such
compartment or box with burnt gas and extin
end plate is preferably joined to the tank by
guishing the pilot. Without the heat from the
pilot directed on this burner barrel to maintain 25 means of welding. Such end plate also forms a
partition between the instrument compartment
this draft condition, other means must be pro
and the burner compartment, and in order to
vided to prevent the results mentioned.
facilitate the removal of the parts 28, 29 and 30
Heat from the burners travels upwardly
as a unit from the burner compartment, these
through a vertical stack or ?ue 3|, surrounded
elements are mounted on a plate 52 that is de
by a tubular insulation jacket 32 to prevent dis
tachably secured to the end plate 5| by any suit
sipation of heat. The ?ue has a beveled, upper
able means, such as bolts 53. To accommodate
end, and a ba?le 33 is rigidly secured to the up
such procedure, the pipes 24 and 21 are provided
permost edge of the ?ue and functions to divert
respectively with union joints 54 and '55.
combustion gases leaving the ?ue, into a heat
At this point it will be noted that the burner
chamber 34, the top of which is formed by the
compartment may be provided with a window
bottom of the tank 8, and to facilitate the heat
55, and that the housing H has one or more doors
ing of the contents of the tank, the bottom of
5‘! which may be locked to prevent unauthorized
the latter may be provided with protuberances
tampering with the parts which are arranged
35 which extend into the heat chamber. The lat
ter may be formed by a tube of U-shaped cross 40 Within the housing.
As before stated the insulating jacket 32 is sup
section, as indicated in Fig. 2, and ‘the sharply
ported by the U-shaped' tube, while the ?ue 31
bent portions of this tube may be secured to the
and its baille 33 are mounted on the insulating
bottom of the tank by lines of welding indicated
jacket and supported on the latter by radial arms
at 36. Due to this construction, opposite U
shaped walls 3'! and 38 are spaced from one an 45 53 which are secured to the ?ue and rest on the
other to provide a U-shaped passageway 39
through which air for combustion may travel
For the drainage of condensation from the
chamber 34, a drain tube 59 extends downwardly
toward the burner and be preheated on the way.
through the burner compartment, and to prevent
The left end of the wall 38 (Fig. 1) terminates
at one side of the burner compartment or box 50 freezing of condensate in the tube during cold
while the wall 3'! continues across the top of the
weather, the tube may be insulated as shown at
63 and extended into the ground (not shown).
burner box and is secured to an end plate 5| of
the housing I l. The portion of the wall 3‘! which
It is believed that the operation of the appa
extends over the burner box is provided with an
ratus will be obvious from the foregoing descrip
aperture for the reception of the parts 3| and 32 55 tion, but it may be stated brie?y that the heated
so that combustion gases from the burner box
gases resulting from combustion will flow from
are constrained to travel through the ?ue 3i and
the burner 23 through ?ue 3! and heat chamber
cannot reach the heat chamber 34 by passing
34, so as to heat the contents of the tank, before
about the exterior of the insulating jacket 32.
the products of combustion are discharged
One end of the heating chamber is formed by a
through 42 and 43. Of course, the outgoing hot
gases will also heat the incoming air travelling
vertical plate 40 shown in detail in Fig. 3, and
the upper curved edge 4| of such plate may be
through the passageway 39. The element 26 will
welded to the bottom of the tank 8. A ?ue 42 is
control the burner so that the burner will be ig
nited upon a predetermined fall of pressure or
cradled in the U-shaped tube and connected to
the plate 40, and one end of the ?ue terminates ’” temperature of the contents of the tank.
In the structure illustrated in Figs. 1 to 3 in
at the outer end of the U-shaped tube and is lo
clusive, the tube 42 is not surrounded by the pas
cated within a draft equalizer 43. The bottom
sageway 39 but merely in contact therewith.
portionof the ?ue 42 may extend into the heat
Where a greater amount of heating of the air for
chamber 34 and be secured to the top portion or
wall 31 of the U-shaped tube, as shown in Fig. l.
combustion is desired, the structure may be mod
i?ed as illustrated in Figs. 4 to 6 inclusive. In
The draft equalizer is in the form of a vertical
this case, the U-shaped tube 60a will terminate
tube having end closures 44 and 4'5 which are
at one end in a plate 6| that may be welded to
held in spaced relation to the tube by means of
the storage tank 62. A ?ue pipe 63 may be ar
brackets 46, to provide an air intake 41 and a
gas outlet 48. Due to my construction, hot gases 75 ranged within and be surrounded by an air in_
’ 2,408,084
take pipe 64, the latter being secured at one'end
to an apertured plate '65 that is detachably se
cured to the plate 6| by any suitable means such
as screws 65. The outer ends of the tubes 63 and
64 are closed asindicated at 61, and the ?ue
63 has an outlet sleeve 88, while the tube 64 has.
an inlet sleeve 69. In this embodiment, the parts
63 and 64 may be removed as a unit to facilitate
cleaning of the passageways through which the
air and gases travel.
In Fig. 7, I have illustrated an embodiment
adapted for the heating of various materials by
fuel from an extraneous source.
In this case,
being arranged so that said separating means
forms a portion of the bottom of said heat cham
ber and the wall of said tank forms the top of
said heat chamber; a stack establishing commu
nication between said burner box and said heat
chamber, said stack including a leg portion de
pending from said heat chamber into said burner
box and terminating in an inlet, and a baf?e in
said heat chamber at the upper end of said leg
portion for de?ecting gases from said stack hori-,
zontally into said heat chamber; means for ad
mitting fresh air into said burner box; and a
' burner in said burner box aligned with said leg
of said stack, whereby the products of combus
the bottom of the storage tank 70, and the fuel 15 tion pass directly from said burner into said inlet
of said stack;
for combustion, purposes will enter the heating}
3. Heating apparatus comprising: a tank
unit through ‘a valved pipe ‘(I connected to
branches l2 and 13, the former leading to a ther
adapted to ‘contain a medium'to be heated; a
casing at the lower side of said tank including
mostatically controlled valve structure or pres
‘a burner box and an elongated heat chamber
'sures'tat 14 which has an element 15 extending
above said burner box; a partition separating
into the tank; The instrument will control the;
flow of fuel through a conduit 16 to the main > _ said burner box from said heat chamber, said
heat chamber being arranged so that said parti
burner ‘H’, which fuel will be ignited byvthe pilot
tion forms the bottom of said heat'chamber and
burner 18.
In this embodiment, instead of supporting. the 2 the wall of said tank forms the top of said heat
?ue 19 by the insulating jacket 80, an elbow
chamber; a stack establishing communication be
tween said burner box and said heat chamber,
shaped ?ue may be used and its horizontal out
said stack being in the form of an elbow and
let portion 8| secured to the tank by a welded
including a vertical inlet leg portion extending
joint 82. Likewise, the type of flue having a
through said partition and depending from said
ba?ie at ‘the upper end as shown in Fig. 1, may '
heat chamber into said burner box, and a hori
be used and the ba?le welded directly to the tank.
zontal outlet leg portion. disposed in said heat
With such arrangements, the heat from the ?ue
chamber; means for admitting fresh air into said
will be directly imparted to the metallic shell of
burner box; and a burner in said burner [box
the tank.
aligned with said vertical inlet leg of said stack,
While I have disclosed what I now consider
whereby the products of combustion pass directly
to be some preferred embodiments of the inven
from said burner into said inlet leg of said stack.
tion, it is manifest that changes may be made in
4. Heating apparatus comprising: a tank
the details disclosed, Without departing from the
adapted to contain a medium to be heated; a
spirit of the invention, as expressed in the claims.
What is claimed and desired to be secured by 40 casing at the lower side of said tank including a
1 burner box and an elongated heat chamber above
Letters Patent is:
1. Heating apparatus comprising: a tank
said burner box, said casing being arranged so
that the wall of said tank forms the top of said
adapted to contain a medium to be heated; a
heat chamber; a ?ue establishing communication
casing at the lower side of said tank including a
burner box and an elongated heat chamber above 45 between said burner box and said heat chamber,
said ?ue including a leg extending into said burn
said burner box, said casing being “arranged so
er box and terminating in an inlet and a portion
that the wall of said tank forms the top of said
extending into said heat chamber and termi
heat chamber; a ?ue establishing communica
nating in an outlet; means for admitting fresh
tion between said burner box and said heat cham
ber, said ?ue including a leg extending into said 50 air into said burner box; a burner in said burner
box aligned with said leg of said ?ue, whereby
burner box and terminating in an inlet and a,
the products of combustion pass directly from
portion extending into said heat chamber and
said burner into said inlet of said ?ue, means
terminating in an outlet; means for admitting
for draining condensate from said heat chamber
fresh air into said burner box; a burner in said
burner box aligned with said leg of said ?ue, ,55 and preventing it from entering the burner box,
and insulating means surrounding a portion of
whereby the products of combustion pass direct
the means for draining condensate from the heat
ly from said burner into said inlet of said ?ue,
chamber. '
and means to prevent gases from passing be
5. Heating apparatus as claimed in claim 1 in
7 tween said burner box and said heat chamber
60 which a pipe leads vapor from the top portion of
around the outside of said ?ue.
the tank to the burner, and means interposed in
2. Heating apparatus comprising: a tank
said pipe and responsive to a condition in said
adapted to contain a medium to be heated; a
tank for controlling the passage of vapor to the
casing at the lower side vof saidtank including a
burner box and anelongated heat chamber above
said burner box; means separating said burner 65
theheating and burning unit may be Welded to
box from said heat chamber, said heat chamber
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