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Патент USA US2406077

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Aug. 20, 1946.
2,406,071 à
A. F. Howe:
COAL DEvoLATILI-'ZER
Filed June 15, 1944
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Aug. 20, 1946.
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‘_ A. F. HowE
COAL
DEVOLATILIZER
Filed June 15. 1944
~
2,406,077
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'
-5 Sheets-Sheet 3
WÚMMW
Aug.. 20, 1946.V
'
--
A. F. HowE
coAL
DEvoLATILIzER
Filed’ June 15., 1944
'
-
'
`
2,405,077
_
4 5 Sheets-Sheet 4
Aug. 2o, 1946.
A. F. HQwE
y
, COAL DEVOLATILI ZER
63
57
" -
2,406,071
2,406,071
l Patented Aug. 20, `1946
UNITED STATES PATENT OFFICE
COAL- DEVOLATILIZER
Andrew F. Howe, University City, Mo., assignor to
Centrifugal & Mechanical Industries, Inc., St.
`
-
Louis, Mo., a corporation of Missouri.A
Application June 15, 1944, Serial No.->540,51-2V
7 Claims.
(Cl. 202-26)
y
2.
1
This invention relates to devolatilization of
coal; and it has Special reference'to a method
slurry coal or quantities of small bodiesr of coal
and apparatus forreducing thesvolatil'e in coal
briquettes or bodies for combustion, or is not soy
so that slurry coal or small bo‘dies of coal that will
formed.
regardless of whether the coal is formed into .
pass through a screen having a relatively fine
Fig. 2` isa vertical longitudinal sectional‘view
mesh may be readily formed into combustible
of an apparatus for reducing the volatile content
briquettes and nearly all of the combustible gases
of slurry coal or of quantities of small bodiesoi
burnt during combustion of the briquettes.
coal, and also forming the devolatilized coal into
An object of the invention is to provide a
briquettes or solid bodies.
Y
f
method and apparatus for removing the volatile- 10V Fig. 3 is an enlarged sectional view of a portion
from slurry coal and from quantities of small
of the conveyor for the slurry coal or srnall
bodies of“ coal by carrying the same through a
particles of coal and of one form of device for
heated'oven by a constantly'moving conveyor so
shaping the coal into solid bodies or briquettes.
that most or a desired amount of the volatile
Fig. 4 is a still further enlarged sectional view
content of the coal will be detached and sepa 15 of a portionyof the device that shapes the coal
rated therefrom, withdrawing the separated vola
into solid bodies or briquettes. Y ,
tile content from the oven during -movement of
Fig. >5 is a plan view of a portion of said device. ‘
thev coaly therethrough, andthen forming the sub
Fig. 6 is. a perspective view` of a solid body or
stantially devolatilized coal.` into briquettes or:`
briquette of dev_olatilized slurry coal made by the
other substantially solidbodies‘ convenient for 20 apparatus of the present invention.
'
handling, transportati’omand combustion.
'
Fig'. 7 is a‘vertical cross-sectional view on the
Another object’ of--the invention is to provide
`line '1_1 ofFig. 1.
an apparatus for `separating a desired amount of ~
.
’
_
y Fig( 8 is aside elevationof the apparatus shown` ,_
the volatile content from slurry/coal `and from
in Fig, 1.
. .
ì
quantities of small bodies of coal by the appli 25 Fig. 9 is la sectional View of'a portion of an ap
cationofheat generated by al combustion device
paratus for Vforming the devolatiliz’ed coal into
using 'and burning the separated volatile con
solid bodies or briquettes.
tent of .the coal, or using and-,burning other fuel
Fig. 10 lis* an-enlarged side elevation of one of
or using and burning both saidrseparated vola
the cutting rolls shownin Fig.'9.v
'
tile `content‘and said other fuel, as` desired, andV
Fig. 11- is a similarly enlarged sidevelevation
means for formingv thesubstantially devolatilized.
of a portion ofa cooperating cutting roll.
coal into solid bodies or briquettes that maybe
conveniently handled and which will readily burn
Fig. 12 is a perspective view of another form `
or shape of a solid body or briquette of devola
Without discharging objectionable quantities ofv
obnoxious smoke, fumes, and gases.
~
Another object of the invention is to provide an
tili'zed coal formed by~ the rolls shown in Figs. 10`
2:5
and 11.
`
improved method forreducing the volatile cont
Fig. 13 is a vertical'longitudinal sectional view
of an apparatus for practicing the invention by
tent in slurry co-al or small bodies of coal» by
the use of fuel gas only.
passing Vor conveying’said coal into, through and
'
,
_
The apparatus shown for removing» volatile
from a heated oven at a selected 'rate of speed, 40 from slurry coalor from quantities of small bodies 1
withdrawing from said oven the volatile content
emanating from the coal therein and thereby
creating ¿or forming a partial vacuum in said
of coal comprises Ya furnace having refractory
enclosing walls I. This apparatus is an embodi-`
emanates from the coal therein and which is
may 'be divided-into at least two combustion
chamber'sor fire-boxes 2 by a partition 3, alsoç
preferably composed of refractory Vmaterial.
Each combustion chamber ofthe furnace may
ment of an idea of means comprising part of the`
oven, supplying fresh air into Asaid oven to re
invention for successfullyV practicing the methodv
place r» or rreplenish the .volatile content that 45 portion ofthe invention. If desired, the Vfurnace
withdrawn therefrom, and` discharging the coal4
in any form desired after it has passed from said
oven.
.
;
Other objects will appear from the following 50 -enclose a chain grate yStoker `Il of known con
description, reference being made to the annexed
struction and actionfmounte'd at one side ofV they
drawings, in which-_
.
1
,
Fig. 1 `is a plan View showing one form of an
furnace on a rotative operating or driving roll 5
and, at the opposite side of the furnace, on a
apparatus for practicingv the present invention
rotative supporting roll- 6». The rolls 5'and‘6 areof substantially 'reducingy the volatile contenty of 65 preferably. ofY the samev diameter and rotate about
2,406,077
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ends of the furnace. The shaft 20 may be con
Í À horizontal axes in the same horizontal plane. Y In
stantly or intermittently rotated by connections
the modification of the apparatus shown, there
. 3| operated by an electric motor 32 through suit- .Y
l Vare two combustion chambers 2 each having‘
therein a chain grate stoker 4 and having the
able speed reducing gearing (not shown). Be
driving rolls for r`said respective chain grateï
stokers mounted at opposite sides of the furnace.
tween the sprocket Wheels 23 and I9 the chains
' I8 operate along and are supported by rigid rails
Within the furnace, the ends of the chaingrate ‘ __
` „ stokers 4î'o'perate'pn,and'along'supportingrails1. ‘
`
Each driving 'roll 5 may‘b'e -rotated' intermittently'j
or continuously as desired by operating mecha-v
, nism provided for that purpose;
As shown, an '
electric motor 8 is operatively connected withthe l Y
t »shaft 9 of each operating roll 5 yby suitable speed
reducing gearing I 0. Any knowntypev of coni-2
nection
driving roll
from5 the
maymotor
be employed.
8 to the shaft
SolidA3'fuel
ofeach
such tf
as kcoal may be fed onto the endofyeach grate 4 ï _
f
above Yor adjacentto the driving roll 5 through
' a hopper-Y II. The hoppers II extend Vthe' ‘full‘
33 which support the uppers‘tretch >ofK the con
veyor Í inra straight horizontal' plane; andïfprevent 1 .
sagging thereof. iIf desired‘,“the‘"intermediate por
tion of the conveyor bottom walls 29 between the
chains I8 may be supported by any appropriate
device. It will be noted in Fig. 2 that the bottom
walls 23 of the conveyor pans 29-30 are close to
-the covers I3 which form the bottom wall of the
*oven I4 through which the coal is carried by the
conveyor and subjected to heat emanating from Y
_ the furnace.VV
.
The slurry coal or quantities of small bodies of
- coal are deliveredonto the upper stretch ofthe y
conveyor comprising the pans 29-30. The coal
width
will ,. discharger
ofthe respective
lthe coalchain
onto grate
said stokers
grate stokersl
4, and 1
is delivered in controlled quantities Vthrough a
for movementïinto the furnace. The two grates,
shown move inlopposite directions across the fur
lowerend extending nearly the fullwidth of thev
nace .through the respective chambers 2, fromv
which -the burnt gases, smoke, andlikeprodu‘cts»
ofcombustion are conductedrand passthrough
chute 34 `having a discharge opening 35 at'its
conveyor between the side walls 30 of the piv
,otally connected conveyor pans.? The walls of the
chute 34 forming the discharge opening 35 ter-Y
minate immediately above the'side walls 30 of thef
conveyor pans and doV not interfere WithY the free g
Vcombustion chamber 2 at the opposite side of the`l
movement and operation of said conveyor. A
furnace .from the stoker _hoppers Il. Each com»`
' bustionA chamber4 2 is provided Witha cover YI3, :sa hopper 35 for containing the slurry coal Yor quan
tities of rsmall Vbodies of coal tov be processedv by
preferably of. metal and which may beof archil
this invention opensvinto the upper end of the
formationand whichprevents ignition and com-`
chute 34. Measured quantities of slurry coal or
bustion of a'slurry. coal or Quantities of smallî
flues> iI2; _ One „of the ñues I2 ,opens fromV eachV
.
bodies fo coal conveyedA through the oven ¿I 4 «above
t
'
the furnace.
*
.
The ovenV I4 is wholly out of communication'
with 'the combustion chambers 2 and is covered
by ag top -wall I5 which may be composed* ofthe
î Ysameärefra‘ctory material iormingthe'walls I. and;V
fof Íthe small bodies of coal contained in the hopper
V35 are -moved from said hopper and discharged
Vinto the chute34 automatically and as an inci
dent to operation of the apparatus. A rotary l
shaft 33 extends horizontally across the »comf-V
Ymunication from the hopper 35 to the chuteA 34
'concentrically with opposite portions 3'I andl38 ,
3, or of other appropriate material as desired..V An1_
Tof -theV Walls connecting'said hopperv withI said
elongated-‘horizontal inlet fopening'zIS is formed
through one of the walls I of thev furnaceV above»Y chute. Thefshaft 3B is rotated byvdrivingfcon-k "
the cover I3, anda complementary horizontaliouta Y
nections from the motorlß. . A pair of circular end -.
Walls 33 are attached -to` the shaft 36 and are Y
let opening I'I is formed through the opposite Wall
lof the furnace. vThe, conveyor forv theslurry" 45 connectedcby4V walls A4I] extending rradially from
the Ashaftf36, and cooperating withthe Wa11s39 to
coal `or quantities of smallbodie's of coal passes;V
form' measuring _compartments 4 I'. >Each meas
through the opening I6 into the oven I4 and'
passes .from saidV oven through the opposite -com
plementary openingul'l.
The conveyor itself is;
`~ of ,novel` construction, comprising Vat least two ,
endless »series ‘of pivotally connected y_links YI8
forming endlessV chains engaged with two axially
alined sprocketwheels VISÍattached to a rotary 1
actuator shaft 20 beyond,V the outlet openingV I'I.1
The sprocket chains I8 engage similar sprocket
wheels 2I, 22 and 23 attached to shafts 24,25 and
26, respectively. All of the shafts 20, 24, 25 andv
26 extend horizontally and> parallel with Yeach
other. 'It is evident that, when the shaft 20 is
rotated in a counter-clockwise direction, as indi-v
cated by the arrow 21V (Fig. 2) , the sprocket wheels
_I3 Will be rotated in the same direction and' will; '
thereby move both or all of the sprocket chainsV I8
in theqi're'ctioii of the arrow 2a. Y' 1 „ «
Y
Y The` complementary links I8/ on the respective
chainssupport -pans veach comprisingY a bottom
uring 'compartment 4I will Yreceive and move a
quantity of slurry coal orrsmall bodies of coal
from the hopper 35 during rotation of the meas
uring device and successively discharge said quan
tities into the chute 34 from which the coal moves
by gravity Aonto the conveyor. The shaft v36 is
rotated by a'connection 36' operated by the ro- `
tary conveyor shaftiZB only whenAV the conveyor isY
operated bythe shaftA 2IJ__ (Fig. V8).
». .
.
_ A pipe 42 opens through the topV wall I5 of the
oven I4 and constitutes an outlet passage for With
drawing gases and volatile liberated from the coal
in and passing through the oven I4. r.A'vacuum
pump 43 operated by connections 44 driven by al
motor 45 is connected to the eñluent end "of theV
passage 42 and functions to withdraw gases and"
volatile from the oven and form or create a par
tial vacuum therein. . The oven' I4 is airtight, and
receives no outside air except .through -the open
Wall 29 extending therfull distance betweenthev
ings I6 and ' I1.
tworrsidechains I8, and two end walls 30. `The Y
the emanation and withdrawal of volatile con- '
Vheight'of the side walls 33 ,of thepans is less than.
theriverticalrwidth of the vopenings VIG’and I’IfintoV
and from the oven I4, sothat the conveyor'com
prising theV sprocket chains I8» and the pans
l-23-930 jmay pass'freelyßthrough said openings.
The pair of shafts îßrand 24 and the complem?en,
tent from the coal Within Vthe oven.
This feature substantially aids
From the Y f
vacuum pump 43, a -pipe~46-conducts ythe gases
and volatile into a tank 4'I which may be located
in any place desired and which is shown Íbetween".y ~
one of the walls I ofthe furnace'and the _adja-'
cent pair of>-shafts 2ûand 241~7A pipe 348 opens
tary _pair of shafts 25 and yZtare beyond opposite >75 fromtheginsideoffthe lupp'erfend of the tanliz'pllr'l'V
d
sacem?
5
6
and has .stretches or .extensions ¿49.:across~1each
combustion .chamber :'2 substantially .above ithe
stokergrates 4.and below the.covers ‘|53 iofthere
spective combustion chambers 2. The stretcheso?
extensions V4.9 are providedwith numerous gas out
for «the fshaft §25, '.etc. .At i the ¿opposite :endthe
mechanism .i comprising 'the shafts' 120, Í 24, lthe
briquetting device, .the 'mechanism' "58-159-'161
and itheïbrushi63-“B.4, are enclosed ina~com-
par-tmentformed by Said enclosing wall .69.
let` openings '50 :for.discharginggasfinto the >com
bustionchambers for mixture with the gases and
fumes rising from the v.burning coal V`en_thek stoker
YAir .maybe admitted into the space 'enclosed
by the Walls 'I9 >and th'ence intothe oven-'Min
order .to prevent formation of excessive'va'cuum
grates, and thus burning said gases constantly
therein 'by operation of the vacuum pump .43
during voperation of the apparatus. 'By making 10 which withdraws gases and air from theoven >Ifl‘l
the-areas of the holes 50 of proper size,:they will
through 'the pipe 42. An air inlet device 1| opens
co'ntrolthe pressure of the gases .pumped there
into one end_of said space .which is Venclosed by
throughanddispense .with .the necessity of .using
the kwallsï 69 Yand Vfunctions'to admit air into said
valves‘ior the like in connection with .the pipe .138
space and thence into .the oven f|4¿th'rough.`the
ofithe. :extensions '48.
.
15 openings I6 andtlr'l. Thus, >theair inthe oven
L'Ilwo Aparallel `horizontal shafts A5IA and ¿52;a're
isreplenished> andv formation of vexcessive :vacuum
supported ¿forrotation above the conveyorZB-Bß
adjacent -.to .and ¿beyond ¿the outlet .opening :l1
therein is‘prevented.
_
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~
ïBy. themodiñcation shown‘inFigs. .9, »10=andf I1,
from the oven -M :and between the v'furnaceîwall
thedevolatili'zed coalon the conveyor i2 9-430 may
I and the vertical plane or discharge end »oflthe 20 becompressed and cutíinto‘solidbodies orlbri
shaft 2i).V A 'pair oflsprocket'wheelsf53.is attached
to'eachof said shafts 5I .and‘:52. An endless de
vice fror forming the .'devolatilized coal intosolíd
quettes 12 (Fig. 12) otherwise than >.by the `de
viceshown in Figs. A3, 4 and ».5. In substitution
for said zdevice, the said »mechanism shown in.
bodies or briquettes is enga ged _upon the sprocket
Figs.- `9, v10V and 11 may `be used for compressing,
wheels 53. .Saiddevice comprises as'eries of piv 25 shaping and cutting the coa'l on the conveyor
otally connected .transversely elongated 'links 54
£9435 into solid bodies or briquettes. An- end
in which are formed `molds .'orcutters 55;forcut-lesspresser- devicei13 is mounted> on the- sprockety
ting and compressingthc layer of substantially
Wheels 53 in substitution for the endless cutter
devolatilized sheet of slurryY coal orsheet of small
518-455„and isA formed with a smooth outer sur
bodies of coal spreadupon'th‘e conveyor bottom 30 face instead of thermolds or cutters >55. ‘The
walls '29'.and which had. been carried Athereby
presser device operates inthe same manner as
through the >heated oven I4. The moldsxor cut
the endless device 54 which contains th‘e molds
tersï55 ¿cut vand compress the substantially `devola
or .cutters‘55 and functionsto compress, smooth
tilized layer of coal into solidV bodies orîbriquettes
and flatten thedevolatilized coal on the »conveyor
56 (Fig.r 6), leavingzsaid solidîbodies .or .briquettes
‘2Q-13D. Forwardly beyond the presser `device 13
56 on'the .conveyor for :discharge therefrom Ibe
yond the s'haft2û. vOne of the shafts `5| Aorf52 may
be’rotated by the connections 3l .operated 'by ‘the
motor 32 for rotating the shaft 12a (Fig. '8),or
otherwise as desired. Thus, lthe >-conveyor and
the 'briquetting device may be concurrently oper
v a roller 'M extends parallel with the upper sur-V
ated.
'
.From the conveyor 252-30, the briquettes ‘are
discharged >intoa ch‘ute T51 and conducted >to a
rotary discharge fdevice comprising a shaft 58
attached Vto circular end Walls-"59 connected‘by
Walls 6i) extending radially from 'the shaft 58.
The shaft>53 is rotated by’connections 58’ oper
ated by :the motor 32. The walls ‘5S-6U ’form
compartments 6| lwhich receive quantities of
briquettes from’the chute :51.and deliver them
into a discharge chute 62. 'Any particles of vcoal
adhering to the conveyor may ‘bedetached there-V
from by‘a brush-63 (Fig. 2) supported andoper
ated by a rotary shaft `«lit below the plane of the
shaft 2G. 'I'he brush 63 maybe rotated in'th'e
direction o'f the arrow f55 (Fig. 2) >and thereby
impel and cause the detached particles of coal
to drop by'gravity into Va space 66 from vwhich
they may be Vremoved and replaced, or otherwise
disposed of as desired.
The -end of each combustion chamber 2 .oppo
face of the conveyor 29--~30 and `has numerous
circumferential and longitudinally spaced cutting
knives or ñanges 15 which cut the compacted de
volatilized coalinto parallel longitudinal-strips y
during movement ofthe conveyor 21S-30 «under
th‘e .said roller 1.4. Adjacent to v:the rol1erf1ï4
another roller `16' havingnumerous longitudinal
cuttingknive's or flanges 11 .is >arrangedjtorcut
transversely 'the pressed devolatilized .rcoal `that
had been cut into parallellongitudinal:stripsfby
the circumferential flanges'or‘ cutters 15.> The
roller 14 with its circumferential flanges .or cut
ters 15 and the roller 16 Withgits longitudinal
flanges or cutters 11 cut the pressed Vdevolatilizl-:id
coal intosaid solid bodies or briquettes12 which
are discharged or dropped Ifrom the «conveyor
29-30 into th'e hopper 51, asïdo the -solid ‘bodies
or briquettes 56. The relative positions ofthe
rollers 14 -and 16 may be reversed, and they may
be positively driven or freely rotative if desired.
The modiñcation shown in Fig. 13 is designed
for the exclusive use of gas asv a‘fuel Within the
combustion chambers. That is, from the said
modiñcation of the invention shown in Fig. 13,
the coal Stoker gratos 4, motors 8 and >connec
tions therefrom for operating said stoker grates,
th‘e ashpits 61.for receiving ashes andsolidrefuse
from the combustion chambers 2, and other parts»
site from the fuel feed h'opper Il -and'driving
roll 5 discharges the ashes and’waste remnants
required when coal is used as a fuel and ,that are
of the burnt coal into a'closed ashpit'61. -Above
not required when gas alone is >used as a fuel,
each ashpit 61, the ends of ~thecornbustion Vcharn
bers2 are-provided with clean-out doors'ßß‘which
are omitted._ In this form of the invention, .the
areí closed during operation of the apparatus and
vertical >height of the> combustion chambers 18 .
which lmay be opened to Vpermit ‘the respective
is considerably less than the vertical height of
combustion chambers to be `cleaned Vby removal 70 the combustion chambers >2 to which they are
of solids therefrom. Beyond the'ends vof thev
otherwise analogous. From the stretches . or ex
furnace, Yenclosing Walls 69 extend. At one end
tensions 49 of the gas conduit pipe 4.8, numerous
the fchute -34 opens through the topof -the- enclos
gas burners '19 receive gas and extend toward »the
ing wall A69 'which encloses the lmechanismfcom
metallic covers I3 for said combustion chambers
prising the shafts 25, S26, adjusting devices ‘10 75 18. Additional -qu-antities #of -either natura-l »or
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movement >of said coal through 'said oven,V and
manufactured gas may be supplied into the tank
lll.:v or .directlyto -th‘e pipeV ¿I8V or stretches 49,.
compressing said coal flatwise on said conveyor
‘only after said coal has been moved out of said
5 through -a pipe ’80, so that a'constant supply of i
ì Y a suiiicient amount of gas is always delivered and
oven.
'
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e
.
4. An apparatus for reducing the volatile con
tent of a loose and unpressed layer of slurry coal
. . supplied to the burners 'i9 when theapparatus i
-is' `in use.. Necessaryïair may be admitted intoV
and small bodies 'of coal," comprising .walls form- "
ing and enclosing an oven and including two
IBIV provided for that purpose. In other particu
opposite walls having elongated horizontal openf
lars, the construction and form of the apparatus i
shown Vin Fig. l3§is th'e sameV as that’already de 10 ings Ytherethrough near the bottom of said oven,
said walls also forming and enclosing a;com.scribed and as shown in Fig. 2, and like reference q
lbusti'on chamber below said oven forY heating the
numerals are applied to the same parts.k .Y
_"From ’the `foregoing disclosure, it is evident ‘K same, an impervious metallic coverforsaidicom-f
bustion chamber forming the bottom Wall of said
that this invention produces solid bodies or bri- ;
quettes of devolatilized‘coal ready for satisfactory § Y oven and supported Vby and cooperating ,With >said
first walls toseal said oven from said combustion
userV as `substantially “smokeless” fuel. 'The ap- `
proximate'temperatures to which theV coal must j
chamber and also Qto heat said oven, afseriesfof
four parallel shafts outside of said oven and said
besubjected while the coal is .Withinjthe oven VIll
the. combustion chambers'lß rthrough openings
combustion chamber, an endless conveyor .sup
or during movement of the coal through said ‘
oven may be predetermined and the apparatus 20. ported by said shafts and extending: through said l `
' oven and through said openings adjacent toy said
mayv be regulated to supply said required tem
cover for receiving and moving through said oven
peratures. The speed of continuous or intermit
said loose and unpressed layer» of saidcoal, other
tent movement of the coal through the oven I4
walls forming 'two compartments enclosing »said
maybe regulated as desired by controlling the
speed Vof continuous or intermittent operation 25 shafts wholly out of Vcommunication >with said
oven, a measuring device operated by one of said
of -the motor 32 and the connections therefrom`
for- rotating the shaft 20 and moving >the con
shafts for delivering a layer 'orV measured quanti
veyor continuously ¿„ or intermittently.
The ap- "
ties of saidfcoal onto said conveyor >inone of said I
paratus specifically disclosed isY for Aprocessing
compartmentsl adjacent to said one shaft, a 'tank
slurry coal to lower the volatile thereof to any 13o enclosed in the other oneof said compartments,
extent desired, and such volatile may be used
and consumed as fuel in the combustion cham
means forming a passage. for conducting from
’ said oven into said tank volatile content emanat
bers that supply heat for devolatilizing or lower-.
.ing fromfsaidcoal in said oven, and a burnerin
ing the volatile content of the coal.
said combustion chamber having connections f
.
The invention may be varied in equivalent par 35 communicating. withfsaid tank for burning said Y
ticulars other than those speciñcally shown and
volatile content and heating said oven.„,
l ,
_
5. An apparatus for reducing the volatile «con
described Ywithout departure from the nature and
' '
tent of a loose andqunpressed layer of »slurry coal
principle thereof.
and small bodies of coal, comprising Iwalls form-v
ing and enclosing an oven and including two op
v 1. The method of reducing the volatile con
tent of slurry coal, which consists in depositing a ` y posite walls having elongated horizontal openings
layerpof> slurryY coal upon a vmoving conveyor,
therethrough near the bottom of said oven,„said
walls-alsogiorming and enclosing a combustion
` >moving said conveyor and the layer of loose and
unpressedslurry coal thereon >into and through
chamberbelow ksaid oven forrheating the same,`
l" Va. heated oven 'containing ‘onlyair and the lvola-1 45 an4 impervious metallic cover _for said combustion
chamber forming the'bottom Wall vof said-'oven
tile and gases emanatingr from said coal, With-î
and supportedby and cooperating with said ñrst
drawing >said air and saidfvolatile and gases em- ‘Y
walls to Iseal said oven fromsaid combustion'
anating from said coal duringmovement of lsaid
chamber'v and also to heat said oven, ran endless
coal through said oven, and compressing and ap
plying pressure to form said layer'of coal into 50 conveyor extending vthrough said oven and
solid bodies or briquettes after »said layer hasv through said openings adjacent to said cover for
receiving and moving through «said Voven said
been »moved through said oven by said conveyor.
.2.' The method of reducing the volatile content
nism for moving said conveyor and thereby said
tions of said conveyor beyond said oven, a meas
gases emanating from said‘coal in said oven „dur
compartments,` a. burner in Vsaid combustion
ing movement of lsaid coal through said oven.
V3. The method of reducing the volatile content
.
Yloose and unpressed layer" of said coaLYmecha-V `
of slurry coal or of quantities of small bodies of
coal, which consists in depositing a loose and 55
.
unpressed layer of said coal upon a moving con
veyor, moving said conveyor and 'said loose and
unpressed layer of said coal thereon into and
through a heated oven containing only air and`
the volatile and gases emanating Vfrom `said coal,`
and creating andforming a partial vacuum in>
and withdrawing said air and said .volatile and
of Yslurry coal or of quantities of small bodies of `
. coal, Which consists in depositing a loose andïun-l
layer of loose and unpres‘sed'coal through _said
oven and discharging said coal therefrom, other
Walls forming two compartments enclosing por-Y
uring device operated by said mechanism for de
livering a (layer, of measured quantities of said
coal onto said conveyor in one ofi-said compart
ments, a tank enclosed in the other lone of‘said
chamber; andY meansv for conducting:- from said g
tank to said burner Yvolatile content emanating
from said coal in said oven.
„ .à
. 6. An apparatus for reducing the volatile con
tent of a looseV and unpressed layer of. slurrycoal
and small bodies of coal,Y comprising walls form-j
pressed' layer of said coal upon a moving con
veyor, moving said conveyor and said loose and
unpressed layer of said coal thereon into Yandv 70 ing and enclosing anoven and includingV two op
through a heatedroven- containing only yair and
the volatile and gases emanating from said coal,
posite Walls having elongated horizontal open'
creating and forming; a partial vacuum in .andY
' said Ywalls also forming* and enclosing a combus-`
withdrawing saidV air and said volatile and gases
tion chamber below said oven for heating the
ings therethrough near the bottom of said oven,`
1A emanatingv from vsaid coal in@ said ovenduring 75.. same, an impervious metallic cover for said com-4
2,406,077
10
bustion chamber forming the bottom Wall of said
oven and supported by and cooperating with said
ñrst Walls to seal said oven' from said combustion
chamber and also to heat said oven, an endless
conveyor extending through said oven and
through said openings adjacent to said cover for
receiving and moving through said oven said loose
and unpressed layer of said coal, mechanism for
moving 'said conveyor and thereby said layer of
loose and unpressed coal through said oven and
discharging said coal therefrom, other walls
forming two compartments enclosing portions
ings therethrough near the bottom of said oven,
said Walls also forming and enclosing a combus
tion chamber below said oven for heating the
same, an impervious metallic cover for said com
bustion chamber forming the bottom Wall of said
oven and supported by and cooperating with 'said g
first Walls to seal said oven from said combustion
chamber and also to heat said oven, an endless
conveyor extending through said oven and
through said openings adjacent to said cover for
receiving and moving through said oven said
loose and unpressedlayer of said coal, mecha
nism for moving said conveyor and thereby said
layer of loose and unpressed coal through said
ing a layer of measured quantities of said coal 15 oven and discharging said coal therefrom, other
walls forming two compartments enclosing por
onto said conveyor in one of said compartments,
tions of said conveyor beyond said oven, a meas
a burner in said combustion chamber, and means
suring device operated by said mechanism for de
forming a passage for conducting from said oven
livering a layer of measured quantities of said coal
to said burner the volatile combustible content
emanating from said coal in said oven.
20 onto said conveyor in one of said compartments,
and mechanism in the other one of said compart
’7. An apparatus for reducing the volatile con
_ ments for pressing and compacting said coal into
tent of a loose and unpressed layer of slurry coal
separate combustible briquettes.
and small bodies of coal, comprising Walls form
ing and enclosing an oven and including two op
of said conveyor beyond said oven, a measuring
device operated by said mechanism for deliver
posite walls having elongated horizontal open 25
ANDREW F. HoWE.
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