close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2110914

код для вставки
March 15, 1938.
2,110,914
R. B. MILDON
FLUID HEATING APPARATUS
Filed June 4, 1936
1
2 Sheets-Sheet 1
March 15; 1938.
R, B‘ MILDON
2,110,914
FLUID HEATING APPARATUS
Filed June 4,‘ 1936
2 Sheets-Sheet 2
5%
INVENTOR
Realm-11.0 B. MILDON.
BY
ATTO
Patented Mar. 15, 1938
i
a
' 2,1199%
UNITED STATES PATENT GFFICE
,
2,110,914
FLUID HEATING APPARATUS
Reginald B. Mildon, Lansdowne, Pa., assignor to
Westinghouse Electric & Manufacturing Com
pany, East Pittsburgh, Fa, a corporation of
Pennsylvania
Application June '4, 1936, Serial No. 83,423
11 Glaims. (Cl. 122-30)
My invention relates to ‘fluid heaters of the sponding walls ‘2|’ and ‘22'. rI‘he radial walls are
type disclosed in the copending application of
joined at their inner ends as shown at 23 and 23'
It. A. Foresrnan, Serial No. $58,336:, ?led Febru-
and [divide the circular heating structure into
dry 24, 1933, and itvwhas for ‘an object to provide
arcuate chambers 24 and 25; the former compris
ing a combustion space and the latter a fuel Ca
magazine. The portion 25 of the wall it which
de?nes the outer wall of the magazine 25 may
be of a single thickness of material and need
not be cooled as it is not subjected to the high
temperatures prevailing in the combustion charn~ .10
2:1 improved apparatus of this kind.
A further object of my invention is to provide an improved ?uid heater of the type having
a rotatable annular grate with a magazine ar-
‘ranged above the grate to feed the fuel gravi-
{10 tationally to the grate and in which ?uid heater
the air for combustion is preheated before being
supplied to the grate.
A still further object of my invention is to provide a ?uid heater of the foregoing character
15 wherein the walls of the magazine-disposed above
her.
7
As the walls 21 and 22 of the fuel magazine
25 are subjected to the high temperature prevail.
ing in the combustion chamber, it is advisable
that they be cooled and some means such as, 115
the grate are air-cooled ‘so as to insure against
for example, a blower 3b is provided for circu~
objectionable heating of ‘the -f_uel vcontained in
lating air between the walls 2i and 21' and the
the magazine.
EIPhese and other objects are effected by my ln~
walls 22 and 22’ respectively. Further reference
to the cooling of the .walls 2! and ‘22 and to the
translation of the air by the blower ,319 will be 20
20 yention, as will be ‘apparent from the following
description ‘and claims taken in connection with
the accompanying drawings, in which:
Fis- -1 is a plan View of my improved fluid
heater;
3;, Fig- 2 is a Sectional View taken along ‘the line
II-.—I.'I ofFig. 3;
>
Fig. {l is a sectional view taken along the line
-
The structure 9 is preferably supported on a
vbase :26 having outer and inner Wall members .27
and 28. An annular grate structure 29 is rotat
ably supported by the base “25 as best shown in 25
Fig. 3.
Fig. 3 :isa vertical section taken along the line
III-:III of Fig. 2;
made hereinafter.
The grate 29 defines the bottom of the ‘ '
combustion chamber g9 and the fuel magazine
25. Goal ;from the magazine ‘'25 is, therefore, fed
by gravity to the grate. ‘Rotation of the grate
lib lvw‘liv of Fig- '3;
Fig. 5 is a section taken along the line _V-—-V
OfFig. 1;
"6 is a sectional view of a portion of the
apparatus shown in Fig. .5 and ,is taken along
3;, the :line VtI.-..—'.Vl thereof;
Fig. 27 is a front elevation ‘of the heater; and,
Fig. 8 is a fragmentary section taken along
the line VI1I—VI1I,of Fig, 2.
Referring now to the various ?gures of the
9 drawings, fluid, such as, for example, water is
heated in a structure 9 having outer spaced :walls
.IB and l l and an inner column I; forming, re~
spectively, water spaces l3 and Ml. A hollow
baiile member l5 connects the inner column E2
29 may be effected inanysuitable manner as, by ,30
a pawl andratchet mechanism shown atBZi in '
Fig. 6. The {latter mechanism [may ‘include a
pawltd carried by a shaft 35 which is oscillated
in any-suitable manner. The pawl 3d engages a
ratchet 135 formed ‘on the underside of the grate 35
structure 28?, so that as the shaft $5 is ‘oscillated, '
the pawl 35 advances the grate 29 step .byrstep
and in clockwise direction, as viewed jin Fig. ‘2.
The shaft 315 is operated periodically in response
to demands for heat, all as is well understood ‘in v4U
the automatic heating art. Preferably, the-blow
eréili' and the shaft 35 are simultaneously oper~
ated so that air is translated ‘to the grate 29 by
the blower 3!) only during periods when the gram
4:, and the wall H and provides ,a communicating
is operated.
space it between the water spaces is and it. ‘A
conduit 11 l admits water to the space 53 .andthe
heated water or vapor .is discharged through
conduits LB and 19 located near the toppf the
if) heaterThe portion or" the wall iii adjacentthe water
space I3 is arcuate in shape as best shown in
Fie- 2, the ends ef the arcuate portion having
a
,
As shown in Fig. 4, the ‘base 2% is divided by
radial walls 31!, p38,,and;379 forming a windbox ill
andanvash receivingchamber 52. The walls ‘31,
338, vand 39 extend from the bottom of the base
25 vto the top thereof and provide ajfurther sup- 50
port for the grate 29. An additional Wall .43 may
extend radially of‘the windboxél ,for supporting
the grate 29 andincludes worsening M for Das
radial walls 2! and 22 secured thereto. spaced
sage of combustion air. The upper edges of the
55 from ‘the latter walls, respectively, are corre-
Wells 131138, 39, 3119145 arer?allgsd» as shown at
2
2,110,914
45 in Fig. 6, for providing suitable bearing sur
faces for the grate and for sealing the windbox
4| and chamber 42. This form of seal is well
known in the art and is described in the afore
mentioned application of R. A. Foresman.
The ash receiving chamber 42 is provided with
a receptacle 4'! for ash discharged from the grate
29. Further reference to the discharge of ash will
be made hereinafter. A hinged door 48 is pro
vided for access to the receptacle 4?.
As shown in Fig. 3, the wall members 2| and 2|’
of the magazine 25 extend downwardly toward
the base 26 and terminate adjacent the upper
surface of the grate. They are closed at their
lower ends, as shown at'50 except for an opening
5| located at the outer end thereof and com
municating with the windbox 4|.
In order to
feed fuel from the magazine to the combustion
chamber, a suitable opening or passage 53 extends
through the walls 2| and 2|’. As the bottom of
the magazine is wider than the grate 29, sloping
plates 54 and 55 are provided for directing the
fuel onto the grate 29 as best shown in Figs. 2
and 3.
An ash discharge opening 56 is provided in the
25
outer walls l0 and II adjacent the magazine wall
22. The ash is de?ected outwardly of the grate
29 by a plate 57 secured to the structure 9 in any
suitable manner.
As shown, the plate 51 is se
30 cured to the inner column l2 and to the wall I |,
this plate 51 being preferably arranged at a
tangent to the grate for facilitating the radial
movement of ash as the grate rotates. It will be
apparent that ash de?ected from the grate falls
over the periphery of the grate into the con
tainer 41.
'
The structure 9 may include a top wall 58 hav
ing an outlet 59 for products of combustion, as
shown in Fig. 1. The outlet 59 is connected to a
40 suitable ?ue, not shown, for the discharge of the
products of combustion. An arch structure 6|
may be disposed in the combustion chamber 24,
as best shown in Figs. 1 and 3, which arch struc
ture extends from the wall 2| to the line 6| (Fig.
45 1) so as to lengthen the path of gas travel from
the grate to the outlet 59.
Fuel is admitted to the magazine 25 in any
suitable manner as through a door opening 62
formed in the wall 26. In order to further pro
50 tect the walls 2| and 22 from the heat of com
bustion, they may be lined with suitable refractory
as shown at 65 and 66, respectively.
In order to operate the foregoing heater, the
magazine is ?lled with coal and the shaft 35 is
55 oscillated. Oscillation of the shaft 35 actuates
the pawl and ratchet mechanism 33 which rotates
the grate 29, whereupon fuel from the magazine
passes through the opening 53 into the combus
tion chamber. The fuel is levelled by the upper
60 edge of the opening 53 so that the bed of fuel is
maintained at a predetermined uniform thickness
as it enters the chamber 24. Ignition is effected
adjacent the wall 2| and the fuel is progressively
burned as it slowly rotates with the grate through
65 the combustion chamber 24, combustion being
completed at some point between the wall 2| and
the plate 5‘! dependent upon the load on the boiler. The refuse is de?ected outwardly by the plate
51 as the grate 29 advances therebeneath, and
70 the refuse drops over the outer edge of the grate
into the receptacle 41.
Air for supporting combustion is drawn from
the surrounding atmosphere through the inlet
39’ of the blower 3|! and is discharged between
75 the walls 22 and 22' and thence the walls 2| and.
2|’. In its passage between these walls, the air
is preheated. The heated air travels downwardly
between the walls 2| and 2|’ and thence through
the opening 5| into the windbox 4|. The walls
2| and 22 are thereby effectively cooled and the
combustion supporting air is preheated so that
the combustion efficiency of the furnace and its
reliability are improved.
During periods when there is no demand for
additional heat and the shaft and the blower are 10
inactive, the supply of air to the grate is sub
stantially reduced. At this time, the outlet 59
being connected to a suitable ?ue, there is a cir
culation of air by natural draft which is sufficient
to cool the walls 2| and 22 and to maintain com
bustion.
From the foregoing, it will be apparent that I
have provided an improved ?uid heater of the
annular grate type wherein the fuel magazine
walls are effectively cooled and the combustion 20
supporting air is preheated, thereby increasing
the efficiency of the ?uid heater.
While I have shown my invention in but one
form, it will be obvious to those skilled in the art
that it is not so limited, but is susceptible of vari 25
ous changes and modi?cations without departing
from the spirit thereof, and I desire, therefore,
that only such limitations shall be placed there
upon as are imposed by the prior art or as are
30
speci?cally set forth in the appended claims.
What I claim is:
1. In ?uid heating apparatus, the combination
of a rotatable grate, an outer wall structure dis
posed above the grate and embodying a space
for ?uid to be heated, a pair of wall structures 35
joined at their inner ends adjacent the central
portion of the grate and extending transversely
of the grate, said transversely extending walls
and a portion of the outer wall defining a maga~
zine for the gravitational feeding of fuel to the 40
grate and one or more of the transversely extend
ing wall structures having a passage formed
therein, and means for admitting air to said pas
sage.
2. In ?uid heating apparatus, the combination 45
of a rotatable grate, an outer wall structure dis~
posed above the grate and embodying a space for
?uid to be heated, a pair of wall structures joined
at their inner ends adjacent the central portion
of the grate and extending transversely of the 50
grate, said transversely extending walls and a
portion of the outer wall de?ning a magazine for
the gravitational feeding of fuel to the grate and
one or more of the transversely extending wall
structures having a passage formed therein, 55
means for admitting air to said passage, and
means for conducting the air from the passage
to the combustion chamber for supporting com~
bustion.
3. In ?uid heating apparatus, the combina
60
tion of a rotatable grate, an outer wall structure
disposed above the grate and embodying a space
for ?uid to be heated, a pair of wall structures
joined at their inner ends adjacent the central
portion of the grate and extending transversely 65
of the grate, said transversely extending walls
and a portion of the outer wall de?ning a mag
azine for the gravitational feeding of fuel to the
grate and one or more of the transversely extend
ing wall structures having a passage formed
therein, means for admitting air to said passage,
and means for conducting air from the passage
in said transversely extending wall structures to
the underside of the grate.
4, In ?uid heating apparatus, the combina
2,110,914
tion of a rotatable annular grate, an outer wall
having spaces therein for the medium to be
heated and arranged above the perimeter of the
grate, ?rst and second circumferentially spaced
walls extending inwardly from the outer wall
and joined at their inner ends for de?ning a
fuel magazine above an arcuate portion of the
grate, the remaining portion of the grate de
?ning a combustion chamber, said ?rst circum
10 ferentially spaced wall having a portion thereof
3
of a rotatable annular grate, a wall arranged
above a portion of the periphery of the grate and
having a space formed therein for ?uid to be
heated, said wall de?ning a combustion chamber
above an arcuate portion of the grate, a maga
zine for fuel disposed adjacent a second portion
of the periphery of the grate and having at least
a portion thereof above a'second arcuate por
tion of the grate, said magazine including ?rst
and second circumferentially spaced walls ex
10
spaced above the grate and de?ning, therewith,
tending transversely of the grate and joined at
a fuel discharge ori?ce, and said second circum
their inner ends, said magazine including an outer
wall connecting the outer ends of the circumfer~
entially spaced walls, at least a portion of said
magazine walls having a jacket formed therein,
said ?rst magazine wall having a portion thereof
spaced vertically from the grate for de?ning a
fuel discharge ori?ce, means for rotating the
grate, means for admitting fuel to the magazine
to be passed through said ori?ce into the combus 20
ferentially spaced Wall terminating adjacent to
the grate, a passage formed in said circumferen
15 tially spaced walls for the circulation of air there
through, and means for admitting air to the pas
sages in the circumferentially spaced walls for
cooling the same.
5. The combination as claimed in claim 4
wherein at least one of said circumferentially
spaced walls includes a layer of refractory on the
side thereof adjacent the combustion chamber.
6. In ?uid heating apparatus, the combination
of a rotatable annular grate, a structure ar
25 ranged above the grate and having spaces formed
therein for ?uid to be heated, said structure de
?ning a combustion chamber above an arcuate
portion of the grate, a magazine for fuel disposed
above a second arcuate portion of the grate and
including ?rst and second walls spaced circum
ferentially with respect to the grate and joined
at their inner ends, said ?rst and second maga
zine Walls having passages formed therein, said
?rst magazine wall being spaced above the grate
35 for de?ning, therewith, a fuel discharge opening,
means for rotating the grate, means for admit
ting fuel to the magazine so that it passes through
said opening as the grate is rotated, means for
passing air through the passages of the magazine
40 walls for cooling the same and means for convey
ing the heated air from said passages to the
grate.
7. In ?uid heating apparatus, the combination
of a rotatable annular grate, a base member for
45 supporting the grate and de?ning a windbox be
neath an arcuate portion of the grate, a boiler
tion chamber as the grate is rotated and means
for translating air for combustion through said
jacket and thence to a portion of the underside
of the grate, whereby the magazine walls are
cooled and the combustion supporting air is heat
ed prior to its passage through the grate.
9. In ?uid heating apparatus, the combination
of a rotatable circular grate, a fluid heating
structure disposed above the grate and having
wall members de?ning a combustion chamber 30
above a segment of the grate, said wall members
having spaces therein for ?uid to be heated and
a magazine for fuel elevated with respect to a
second segment of the grate for delivering fuel
by gravity thereto, said magazine including cir
cumferentially spaced means extending trans
versely of the grate and having a passage formed
therein for the circulation of air.
10. In ?uid heating apparatus, the combina—
tion of a rotatable circular grate, a ?uid heat
40
ing structure disposed above the grate and having
wall members de?ning a combustion chamber
above a segment of the grate, said wall members
having spaces therein for ?uid to be heated, a
magazine for fuel elevated With respect to a sec 45
ond segment of the grate for delivering fuel by
structure carried by the base member and in
cluding a wall disposed above the periphery of
the grate, said wall having a space therein for
50 water to be heated and de?ning a combustion
chamber above said arcuate portion of the grate,
gravity thereto, said magazine including circum
ferentially spaced means extending transversely
of the grate and having a passage formed there~
therewith a fuel discharge ori?ce, means dis
60 posed adjacent the second magazine wall for
magazine for fuel elevated with respect to a sec
1n, and means for translating air through said 50
passage to the grate for supporting combustion
thereon.
a magazine for fuel disposed above a second arcu
11. In ?uid heating apparatus, the combina
ate portion of the grate and including ?rst and '
tion of a rotatable circular grate, a ?uid heat
second walls joined at their inner ends and ex
55 tending transversely of the grate, said ?rst and ing structure disposed above the grate and having 55
second magazine walls having a passage formed Wall members de?ning a combustion chamber
above a segment of the grate, said wall members
therein, said ?rst magazine wall having its bot
tom portion spaced above the grate for de?ning having spaces therein for ?uid to be heated, a
de?ecting ash radially from the grate, means for
rotating the grate, means for admitting fuel to
the magazine for passage through the ori?ce
as the grate is rotated, and means for trans
65 lating air for supporting combustion through the
passage of the magazine walls and thence to said
windbox, whereby the magazine walls are cooled
and the combustion supporting air is heated prior
to its passage through the grate.
70 8. In ?uid heating apparatus, the combination
ond segment of the grate for delivering fuel by 60
gravity thereto, said magazine including ?rst and
second means extending transversely of the grate
and having an air passage formed therein, one of
said transversely extending means being spaced 65
above the grate for de?ning an opening for the
passage of fuel from the magazine to the com
bustion chamber and means for admitting air
to said air passage.
REGINALD B. MILDON.
Документ
Категория
Без категории
Просмотров
0
Размер файла
650 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа