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Патент USA US2123884

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July 19» 1938-
Ü c. B. FAvl-:RTY
VAPORIZER STARTING SYSTEM
Filed Dec. 15, 1932
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2,123,884 `
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Patented July 19, 1938
Y UNITED STATES
PATENT oFFlcE
2,123,884
VAPORIZER STARTING SYSTEM
Clyde B. Faverty, Chicago, Ill., assigner to
Mark C. Bates, Chicago, lll.
Application December 15, 1932, Serial No. 647,391
5 Claims. (Cl. 48-144)
My invention relates in general to vaporizing
apparatus and more in particular to a start-ing
system for a vaporizing apparatus.
In the copending application of Charles A.
5 French, Serial No. 603,491, filed April 6, 1932, a
vaporizing apparatus is disclosed in which hot
gases of combination from a pilot light are _de
livered to a vaporizing chamber below the level
of liquid hydrocarbon maintained therein, where'
10 by to vaporlze a portion of the liquid hydrocarbon
by sensible heat. The vaporized hydrocarbon is.
delivered to an aspirator including a forcing
nozzle through which air under relatively high
_ velocity and pressure is delivered.
The vapor is
15 entrained and mixed with the air and the re
- sulting mixture is delivered to burners for com
bustion.
on certain types of processes.
In some forms of
installations, starting of the vaporizing appara
tus becomes considerable of a problem. This is
25 sometimes due to the fact that the furnace at
mosphere in certain processes must be main
tained with exactness and any deviation from the
desirable character of the furnace atmosphere
even for a relatively short time is apt to cause
For these and other reasons
readily understandable to those skilled in the
art, it ls desirable to have quickly operable and
35
>
In accordance with the general yfeatures of
the invention, I may start the vaporizing appara
tus by thoroughly heating the vapor chamber 5
before the admission of fuel thereto, whereby,
when operation is initiated through the operation
of a blower andthe admission of fuel to the vapor
chamber, the pilot burner will have sumcient fuel
available for immediate ignition. In accordance 10
with another feature, I may employ a commer
cial source of gas in starting whereby immediately
to have a combustible mixture available for
initiating burning at the pilot light. I also pro
vide means for controlling the delivery of the out- 15
v going mixture to prevent incorporation into the
furnace of a type `of mixture not` suited to its
A vaporizing apparatus of this character has
been employed with very excellent and satisfac
20 tory results in a large number of commercial in
dustries, principally to supply heat in carrying
30 deleterious results.
illustrates the vaporizing apparatus and the
means for starting the same.
operation or the process in which it is used.
Now, referring to the drawing, I show a vapor
chamber I0 adapted to contain a liquid hydro- 20
carbon fuel at the approximate -level of the
dotted line A. 'I‘he fuel is supplied by a tank II
passing through a sediment bulb I2 and through
a pipe I3 to a float chamber I4 and from the
ñoat chamber through a pipe I6 to the vapor 25
chamber. It is the float (not shown) which
maintains the level of thev liquid hydrocarbon
constant in the vapor chamber. A balance line
I‘I connected to the vapor chamber and to the
'top of the float chamber maintains a uniform 30
gas pressure and proper operation of the ñoat.
The vapor chamber is connected by a passage
properly controllable starting means for such a
way I8 with a Venturi tube I9 which forms part
vaporizing apparatus.
of an aspirating apparatus including a forcing
nozzle 2|. The forcing nozzle receives air 35
through a pipe 22 from a blower 23, a valve 24
being provided in the line, if necessary. The
amount of vapor delivered to the Venturi tube
being controlled by a valve 26, a portion of the
vapor passes to the Venturi tube, is entrained by 40
the air at the forcing nozzle and combines there
with producing a combustible mixture.
The combustible mixture is delivered to a pipe
21 to which the Venturi tube connects. A pipe 28
‘
'I'he principal obj ect of the invention is the pio
vision of improved starting means for a vaporizer
of the character described.
Another object is to deliver a substantially con
stant type of combustible mixture to a furnace.
40
Another object is the provision of a starting
system wherein full operation may be attained in
a relatively short length of time.
Another object is to start a vaporizing ap-`
paratus with a minimum of loss of time, fuel and
45 energy.
Another object is the provision in a vaporizing
apparatus of a plurality of types of starting
means whereby the vaporizing apparatus is
~adapted. for use with substantially any type' of
50_ process and under substantially any given set of
conditions.
Other objects and features of the invention
will be apparent from a consideration of .the
following detailed description taken with the ac
55 companying drawing, wherein the single figure
shaped ,to` trap some of the combustible mixture 45
is sealed through the wall of the pipe 21 where
it joins'the Venturi tube. This pipe withdraws
combustible mixture which is burned by a pilot
light 29.
Hot gases of combustion are delivered
from the pilot light to a passageway 3| and 50
thence to an extension 32 to the lower side of a
bubble plate 33, supported below the level of
liquid in the vapor chamber. This bubble plate
preferably is perforated so as to subdivide the
gases of combustion and cause them to bubble 55
2
2,123,884
up in a finely divided condition through the liquid
hydrocarbon. The sensible heat of the com->
bustion gases causes a vaporization of a portion
of the liquid hydrocarbon, the vaporized portion,
of course, rising due to the suction of the
aspirator through the connection I8 for corn
mingling with the air at the forcing nozzle.
Since the pilot light depends upon the produc
tion of a combustible mixture for its operation,
and since the production of a combustible mix
ture is dependent upon the proper combustion of
fuel at the pilot light, it is readily understood
that the apparatus may, at certain times, pre
sent some problems in starting, particularly
where relatively very rapid starting is required
and only the most satisfactory mixture delivered
to the main burners.
In accordance with one of the features of the
invention, I provide an electrical resistance 36
beneath the vapor chamber supplied with elec
tric current from a suitable source (not shown)
by wires (not shown), the vapor chamber being
preliminarily heated by passing an electrical cur
rent through the resistance element 36. In
starting, the vapor chamber is ilrst drained by
closing valve 31 and opening valve 38 in the
drain pipe 39. With no liquid in the vapor cham
ber, the heat produced by the heat element will
raise the temperature of the entire combustion
30 chamber. When now, liquid fuel is admitted, a
portion of the liquid fuel will. be vaporized by
contact with the heated surfaces and if the
blower is started at the same time a mixture will
be produced sufficiently rich to burn at the pilot
As the pilot light continues to burn the
35 light.
relative amount of fuel vaporized will be in
creased and very shortly substantially operat
ing characteristics will be established.
The lvapor chamber may be heated before the
I
may, for example, heat it with an ordinary blow
torch, but preferably by backing lup nut 4| on
the pilot light to form an opening to which the
blow torch can be applied. By then operating
45 the blower, the .torch flame will be drawn through
the passageway 3| and will have the effect of
rapidly heating the vapor chamber and all por
tions of the apparatus immediately associated
therewith. 'I'he liquid fuel may then be admitted
40 admission of the fuel thereto by other means.
fore facilitates starting, it will have substan
tially no effect upon operation of the apparatus.
To avoid delivering an improper mixture to
the burners of a commercial furnace, I provide
a three-way valve 46 in the line 2l running to
the manifold 47. This manifold is shown only
schematically, it being understood that it may
consist of a number of branches to deliver a com
bustible mixture to a number of burners. The
three-way valve has a core of a suitable and 10
usual type through which a main passageway 48
is provided, this passageway being connected by
a radial passageway 49.
With the valve set in
the position indicated in the drawing, the two
passageways co-operate to deliver the air and 15
vapor mixture to a pipe 5|. Thus the flow of
these gases to the manifold is cut off and it is
impossible to deliver an undesirable mixture into
the furnace.
By means of the system described, it is obvious 20
that the vaporizing apparatus may be started
under substantially any condition in a relatively
short length of time to produce the maximum
amount of vaporized hydrocarbon after which
the operation proceeds in a normal manner.
Reference is hereby made to my copending
application, Serial No. 647,392, filed December 15,
1932, which discloses subject matter in the form
of apparatus similar to that shown in the pres
ent application.
30
I have described my invention in detail to
permit those skilled in the art to practice the
same. I am not limited, however, to the specific
forms of the invention shown and described, ex
cept insofar as they are defined in the appended 35
claims.
What I claim as new and desire to protect by
Letters Patent of the United States is:
1. In a fuel vaporizing apparatus, a vapor
chamber, an aspirator including a forcing noz
zle and Venturi tube, means for delivering air
at a high velocity through the forcing nozzle, a
connection between vthe vapor chamber and
Venturi tube near said forcing nozzle whereby
fuel vapor is entrained with the air and mixed 45
therewith, means for withdrawing an air and
vapor mixture as it leaves the aspirator, a pilot
light for burning said air and vapor mixture;
means for delivering hot gases of combustion
50 and vaporization will be established sufficiently
from the pilot light to the lower portion'of the
immediately to initiate operation of the pilot
vapor chamber, means for maintaining a pool
of liquid fuel in the vapor chamber at a level
above that at which said hot gases are delivered.
light.
As to the medium of starting under certain
conditions, I also provide a gas inlet 42 con
55 trolled by a valve 43 and connected to a gas main
or suitable source of gas supply by a pipe 44.
'I‘his gas inlet 42 projects into the blower pipe 22,
Where it joins the forcing nozzle so that gas in
amounts determined by the regulation of the
60 valve 43 is delivered directly into the air stream.
The gas so admitted can, if advisable, be burned
at the main furnace burners (not shown). Its
principal utility, however, is to enable the opera
tor to start the pilot light immediately whereby
65 hot gases of combustion may be produced by
the pilot flame and vaporization of the liquid
fuel in the >vapor chamber is started at once.
As the amount of hydrocarbon vapor increases,
the valve 43 is gradually cut oif to diminish the
70 amount of gas introduced until substantially the
maximum amount of vaporization is reached, at
which time the gas is entirely cut off. The gas
inlet is so arranged that it interferes to a sub
stantially negligible extent with the movement
75 of air through the blower pipe. While it there
and means for mixing a supply of gas with the
air before it passes through said forcing nozzle. 65
2. In a fuel vaporizing apparatus, a vapor
chamber, an aspirator including a forcing nozzle
and Venturi tube, means for delivering air at
a high velocity through the forcing nozzle, a
connection between the vapor chamber and Ven
turi tube near said forcing nozzle whereby fuel
vapor is entrained with the air and mixed there
with, means for withdrawing -an air and vapor
mixture as it leaves the aspirator, a pilot light
for burning said air and vapor mixture, means 65
for delivering hot gases of combustion from the
pilot light to the lower portion of the vapor
chamber, means for maintaining a pool of liquid
fuel in the vapor chamber at a level above that
at which said hot gases are delivered, and an 70
electrical heating element disposed in contact
with the vapor chamber.
3. In a fuel vaporizing apparatus, a vapor
chamber, an aspirator including a forcing nozzle
and Venturi tube, a connection between the 75
3
2,128,884
vapor chamber and Venturi tube near the forc
ing nozzle, means for delivering air at relatively
high velocity through the forcing nozzle to with
draw vapor from the vapor chamber, means for
withdrawing mixed air and vapor from the as
pirator, means for burning said mixed air and
vapor, means for maintaining a pool of liquid
fuel at a predetermined level in the vapor cham
ber, means for delivering the hot gases of com
bustion to the vapor chamber beneath the level
of the liquid fuel therein, and means for heating
the vapor chamber to initiate starting before
the admission of fuel to the vapor chamber
wherein said heating means comprises an elec
15 trical heating element disposed in contact with
the vapor chamber.
`
4. In a fuel vaporizing apparatus, a vapor
chamber, an aspirator including a forcing noz
zle and Venturi‘tube, a connection between the
20 vapor chamber and Venturi tube near the forc
ing nozzle, means for delivering air at relative
ly high velocity through the forcing nozzle to
withdraw vapor from the vapor chamber, means
for withdrawing mixed air and vapor from the
aspirator. means for burning said mixed air
and vapor. means for maintaining a pool of liq
uid fuel at a predetermined level in the vapor
chamber, means for delivering the hot gases of
combustion to the vapor chamber beneath the
level of the liquid fuel therein, and means asso
ciated with the chamber to heat the chamber
to initiate starting.
.
5. A liquid fuel vaporizing apparatus compris
ing a vaporizing chamber for holding a pool of 10
the liquid to be vaporized, an aspirator includ
ing va forcing nozzle connected to said vaporizing
chamber, means for delivering air under pres
sure through said forcing nozzle whereby fuel
vapors are withdrawn from said vaporizing cham
ber and entrained in said air, means for pass
ing hot gases of combustion directly into and
beneath the surface of the pool of the liquid
fuel within said vaporizlng chamber, and inde
pendently operated means associated with the 20
vaporization chamber for initiating vaporization
of said liquid fuel.
CLYDE B. FAVERTY.
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