US1549143A - Method of burning brick and analogous ware in tunnel kilns and car for burning the ware - Google Patents

Description

KLNS AND CAR TUNNEL FOR BURNlNG TH? j WARE Filed De@ U l5 1921 2 Shee'f :Shee

land State of Ohio,

" tunnel kilns difaculty of Burning Tunnel Kilns PatentedAug. 11,' 1925.

UNITED `s'ra'rizs PATENT orner..

AMERICAN nRBssLEB. `'riiN- NEL KILNS, ING., HOF CLEVELAND, OHIO, A"COIRIEIJIBAA.'IIN4 0F NEW YORK.v

METHOD or BURNING BRICK ANALoGoUs WARE BOR BURNING THE wenn. y

IN TUNNEL xILNs Nn CAR "Application illed'necember 15, 1921. Serial No. 522,526.'

To all whom it may concern.' l Be it known. 4that I, PAUL A. MEEHAN, citizen of the United States, and resident of Cleveland, in the county 'of Cuyahoga have invented certain new and usefultlmprovements in Methods Brickfazjd Aalogous Ware in 'and ""Carfor Burning the Wa're, of which the following is -a specification. .A

In burning brick and analogousware in is experienced in getting sufficient heat into the portion of the load of ware-on each kiln car traversed by the central longitudinal or verticalplane of the kiln and particularly the ware adjacent this plane at the bottom of the load and in general 'it has been found vpractically impossible to adequatelyl burn this portion of the ware without either overheating the Ware at vthe sides vof-the car or sub'ecting the Ware to an otherwisexunnecessar' y prolonged heat soaking. The object of the .present invention is to overcome this diliculty ,by supplementing 4the ordinary kiln heating means with .provisions for locall'y heating the portion` of the ware not adequatelyV heated by the. main kiln heating means. `A further object is the provision of .a suitable car.

In carryingV o'ut'the` inventionl obtain this local heating effect lby burning a suitable -fuel suchas coal or cokein the ware stacked on each car as it passes through the kiln.- The local heating, fuel thus burned in the ware maybe deposited in the Ware prior to the introduction of the cars carrying the Ware in to the kiln, though in, sonic cases the fuel ma'y be charging holes .formed in the roof of the kiln.` In either .event'the ware should be stacked on the cars provide the proper. combustipn space for the local heating fuel, a nd tov provide for the passage ,of the iflalne and products of combustion into the portion ofthe mass-of ware to be heated therebly,and if a hearth eating fuel is not formed A in the cars -the stacked to provide such,l hearth or lire-box. When the-local heating'fuel supplied throu h charging holes in the kiln'to the4 ware uring its transit through'the kiln, the

for heating ltunnel kilns by thus furnished fed into the'ware as. thelatter traverses the kiln through fuelin such manner astoi.

Ware should be 1chambers B mounted ware should stacked to permit' the passage of the fuel onto the hearth br grate on which it is to be burned.

My invention is applicable in general to kilns of either the mullie heated or. open fire type. I am aware, of course, that various .arrangements have heretofore been proposed burning fuel on the cars carrying the Ware as the latter pass through the kiln, but in such prior arrangements the kiln is Vheated actually or mainlyI by the fuel thus burned on theware or ware carrying car .and in general the heat distribution in such kilns is not better, but on the contrary, Worse than in ordinary open fireor inutile' heated kilns. With my invention thefuel burnt on the cars or' in the Ware furnishes but a small ,portion ofthe heat requirements of the kiln and the heat A is utilized as a means for overcoming unavoidabledefects in the distribution of the heat furnished by the main kiln heating means.

The various features of novelty which characterize my invention are pointed out with articnlarity in the claims annexed to and -orming a part of this specifie'ation. For a better tion, however, and the advantages ppssessed. by it, reference should be had to the accompanying drawings and descriptive matter 1n which I have illustrated and'described preferred modes of carrying out my invention.

Of the drawings:

Fig.'1 is a transverse Asection of a tunnel kilnv with a* loaded car therein; v

Fig-2 is a sideview of the car shown in Fig. 1 withthe ware at the right hand side of the viewshown in section o n the ,line

-Fig. 3 is a view taken .similarly'to Fig. 1a illustratinga modified fbrm of my inven- Fig. 4 is an end elevatioirl illustrating a second modification of my mvention; and

understanding of the rnven.

Fig. 5 is a plan view with a portion of 'represents a continuous tunnel kiln of tha'105 well kr own Dressler type inwhich the main kiln heating means comprise combustion on benches A at-the y p tion chambers to the ware.

cars'1 C which run-on the the goods carrying track railsD. The combustion chambers are formed with channels4 B; in their walls extending transversely to the length of the kiln through which the kiln atmosphere may circulate in the sides 'of the: pathway for direction indicated by the arrows to thereby transmit the heat generated in the combus- The cars 'C shown are of known type formed with chan nels C adjacent their upper surface which extend into the car structure immediately beneath the Ware supporting platform and inclined downward Q 4open A formed -in the ware supporting are open utf-their outer ends and are also to the ware' through ports or slots C3 platform C2. The Ware supporting platform as shown .is

' the bricks to provide one or more hearths a single course of to provide or grates extending lengthwise of the car `along the vertical central plane of the latter. ASv shown there are three of these hearths, D7 D2 and D", each being formed of bricks extending transversely to-the length of the car and spaced narrow draft channels between the bricks. Thev bricks forming the' lower hearth' D are supported at `their ends `by spaced apart longitudinal courses of bricks placed on edge andthe side wall of the firebox above each hearth is shown as formed by longitudinally extending' Vcourses of bricks arranged two the ends'of the corresponding hearth forming bricks. The `bricks forming the supports for the hearth forming brick and side walls oft-hecombustion chambers are loosely spaced as shown in Fig. 2 to provide lateral ports from the fire-box or combustion chambers into the adjacent masses of bricks. vWith the bricks loaded on the cars as shown in Figs. l and 2, the proper amount of lfuel is placed on each hearth or each fire-box preparatory to the introduction of the car into the kiln.

tributed along the length of the fire boxes.

In ordinary practice appreciably more fuell is .placed on the hearth D than on the liearths D2 and D3, as the greatest need for the local heating effect is at the bottom of the loaded 'ware With ware loaded as shown in Figs. iland 2V and with the fuel in place in the fire-boxes as lthe loaded cars pass through the kiln they are heated up from each side of the 'car high and supported by ibottom of the channels C' Advantageously the fuel usedv is anthracite coal or coke breeze -and isdismore or less gradually to the maximum temperature'reached in the kiln and are then/- D', D2 and D3 ignites when the cars reach a po nt 1n the kiln at which the temperature' is sulcientlyj high for the purpose and the sorbed by the' adjacent portion of the ware which is that portion less readily heated by the main kiln heatingmeans While l have illustrated the use of myl invention in connection with a muflle heated kiln of the Dressler type, it is to be understood that the invention is useful in 'other typ desirable'in other types of kilns since in other types of kilns in use the heat distribu` tion throughout the ware is in general less uniform than in the Dressler type of kiln.

In the modifica-tion illustrated in Fig. 3

.f fuel to provide the local heating effect 1sintroduced into the ware as the'latter is in transit through the kiln shown as of the Dressler type, through one or more suitably disposed chargingprifices A formed in the roof of the kiln. As shown a fuel supply hopperE is suspended` above each charging orifice A which may be closed-when coal'is not being passed into the furnace by a suit able brick or damper F.. The ware on the cars, in carrying out my invention in ac cordance with Fig. 3, should be provide a port or ports in vthev upper portion of the ware through which the fuel may fall from the charging orifice on to the hearth Dtprovided for the purpose. This hearth' as shown is like the hearth D of Figs. l and 2, and as shown the port- G through which the fuel falls onto this hearth extends the full length of the car and is provided by arranging the ware on the car in two spaced apart masses inclined t ward one another..

In some cases the hearth for lthe auxiliary heat-ing edect may be formed in the c'ar itself as distinguished from forming it in the ware piled on the car. example, in Figs. 4 and 5, the hearth C* isformed below the level of' the work supporting platformC2 of the car CA adjacent the center of the car, and usually below the when the latter combustion passare used, the productsyof fuel on the ing mainly up from the burning hearth'C* into the longitudinallyextending channel G -formedlinthe" ware loaded on the car and thence rinto the bricks at the sides of the channel.

. My invention is especially adapted for use in burning bricks, because of the .ease with which the ware may be arranged to obtain the desired local heating, and because the relativelyl large tonnage 4of bricks as compared 'with 4most other ware necessary for -heat thus generated is almostl wholly ab-v es of kilns, and in general is even more.-

piled to As shown, for

commercial, economicalL operation leads to a reduction to the minimum of the vprolounged heat soaking treatment by which alone it is possible to adequately heatthe lower central portions of the ware-on the cars without overheating the ware atthe volatile fuel 'such as anthracite coal or coke breeze containing but little volatile matter, itis possible to obtain this local overheating without damaging-*any of the ware or at most only a very smallportion. of the ware when the latter is a coarse product such as bricks. 'y A i l/Vhile in` accordance with the provisions of the statutes I .have illustrated and described theV best modes of carrying out my invention now known to me, it will be apparent 'to those skilled in theA art fthat changes in form may be made without departing from the spirit of my invention as set forth in the appended claims.

, Having now described myinvention, what I claim as new and desire to secure by Letters Patent, is:

, 1 The improved method of heating ware A in a'continuous tunnel kiln which consists a local heating effectobtained in supplying themain portion of the heat` requirements .of the kiln in the usual manner and 'separately supplying heatto secure by burning fuel in proximity to the lower portionof the Ware in the kiln along thecentral longitudinal centralplane through the kiln. l

2. The improvement in the. operation of heating Ware on cars in their passage in the usual ware to provide a combustion spaceextending longitudinally of the kiln along the ver` tical central plane through the kilnadjacent the ybottom of the mass of Ware on the kiln and supplying solidfuel to said combustion proximity to 'said combustion space Vtransversely of the car,

comparatively fashioned in the bed 'at a .point removed` prising d. A car of the character describedlyfomprising a wheeled platform uponV which bricksmay be stacked, and a fuel box locatedV within and removed .from the sides of the car. Y

4. A car of the character described comprising a wheeled thereon provided with heat ues extending and a fuel box platform having a vbed cev from the sides ofthe car and communicating with Said flues. 4 5. A car of the character. described comprising a wheeled platform upon which bricks may be stacked, and a fuel box located within and removed from the sides of the car, suchrbox extending longitudinal vof the car through substantially its length.

' 6. A car of the character described comprising a-wheeled platformhaving a bed thereon constructed with a series of 'transverse heat iiues, hollow iue blocks adapted to products upward and with a longitudinal fuel box removed from the sides of thecar and 4adapted to supply heat tosaid flues and to bricks s et in stacks upon said bed.

7. A car of the character described coma wheeled platform, a b ed thereon, a longitudinal central fuel -box' formed in said bed and transverse heat flues also formed therein and having their inner endsl in communication with said fuel box and their outer ends open to receive heat.

8. A car of the character ldescribed comprising a wheeled platform uponwhich bick may be stacked', and a. fuel box located in the longitudinal central portion thereof. 9. The combination.'with a car comprising awheeled platform having a longitudinal fuel box located near the middlethereof,

Cuyahoga and State of Ohio this 13th day f -of-December A. D. 1921. I u

space to thereby locally heat the ware in PAUL A.- Manna/M.

each flue having aseries of Y convey heat'

Images