US1042725A - Tunnel-kiln. - Google Patents

Description

E. R, SUTCLIPFE.

TUNNEL KILN.

APPLICATION FILED JUNE 15, 1911.

Patented Oct. 29, 1912.

w/iflehssas 5 3721 EDGAR ROUSE SUTCLIFFE, or LEIGH, ENGLAND.

TUNNEL-KEEN.

Specification of Letters Patent.

Application filed June 15, 1911. Serial No. 633,245.

T0 aZZ whom it mag conceive Be it known that I, EDGAR Rouse SUT- ourru', a subject of the King of Great Britain, residing at Leigh, England, have invented certain new and useful Improvemeii'ts inTunnel-Kilns, of which the following is a specification.

This invention relates to. improvements in the construction of tunnel kilnsin which the goods are fired while passing along the tunnel on trucks; and the objects of the improvements are, first, to provide for the thorough and rapid combustion of the gases at the firing. Zone, so that quicker and more economical working can be secured; second, to better distribute the gases so that they are completely burned before coming in contact with the briquets. I attain these objects by the construction illustrated in the accompanying drawing, in which Figure 1 1s a vertical section of the en-- tire kiln; Fig. v2 is a plan View, with'the left hand part shown as a section on the line 67 3 of Flg. 1; and Fig. 3 1s a section through the combustion chamber on'the line.

Referring to the drawings, A represents the preliminary heating zone, B the heating zone proper, C the combustion chamber, D the air heating zone, and E the cooling off Zone. l 7

The wagons R stacked with bricks enter through a door F on the left of the kiln and pass gradually through the kiln to the i right so as to deliver burned briquets at G, the doors being air-tight and being opened to admit and deliver one, or two trucks at a time. and the trucks being so arranged to form a continuous platform as is usual.

The length of the Zones A, B, C, D, and E, is approximately such as to allow of 5, 7, 7, 6, and 3 wagons respectively in each of the said Zones. "The draft is in the opposite dire tion 'to the movei'nent of the trucks and maybe obtained either by a high chimney, or preferably by a fan 0 forcing in air through the flue I, and also under the wagons at the, delivery end of the base flue J. In some cases however maybe ad- The kiln is shown arranged to be fired by producer gas which is brought thereto through the flue K, passing into the kiln by the horizontal fines M, and N; these fines are provided with checker work outlets 0,

and 77 respectively, shown in section in and their size is regulated by dampers m, and further the bridge L projections r and 7, at each end of the this base immediately beneath the checkeuwork the a r and currents so as to obtain internnxing of the two as much as possible. A smaller amount of gas enters through 2, than through 0, its principal object being to heat the air for combustion before it reaches the main firing point at 0. an excess of air is therefore arranged at 9', which heated both by the gas from 70, and its passage over the in andescent briquets reaches 1 at a high temperature and produces there an-lntense heat with very rapid combustion, and in such a way that owing to the restricted area under the gas flues its velocity will be increased and it will produce a protect-ire air current for some little distance into the combustion chamber, thus keeping any possibly unburned gas away from the briquets until its combustion is complete This is a point of great moment, and further the zoneof intense heatis elongated which is also a great advantage. The air for the furnace is introducedfrom I through the top this 2', and is deflected downward on to the hot briq'uets by the deflectors t, reaching the preliminary gas supply at therefore at a considerable temperature and largely over the bridge LgOwizw to the restricted space under the gas entry fines the air remains in the enlarged section 39 a oonsiderable time thus taking up greater air.

The combustion chamber proper eiztends is provided on the air heating side of the furnace, and

openings, for the purpose of breaking up heat, forming a storage reservoir for hot Patented on. as, rein;

from r to c, and having a space above the top of the bricks allows of complete combustion therein without likelihood of nascent, or unburned mixing with the briquets. in cases such, for instance, cement 1111K ture bricks, or when carbonic acid and other i dtl '"d" lldlt/ o c ciiven or an 1e pro utrs o. combustion cannot harm. the brlcks. battle wall uch as it 1h are built to force 7 L V 1 l ,L, J. es in ong'h the stacked bricns on the wagne section it allows of heating of j1'f 11'1g t it without possibility ot ier deleterious in the ct combustion harming them since have already undergone a preliminary heating before reaching this section l b tl 't' t anoin l lot enough 1c]. eroie o prei on .rlFiittlOH trom the products oi com- 1 the section B 18 long enough to or even, wagons; to prevent any on on the colder bricks beg a top flue there opens tne products of tOFfl fllSllOn to I, via the down side line i and mind flue l].

niinary heating referred to is atinto base delivery cud; this may be done c down. lacs 1:: this air passing whole length the kiln becomes lly also ping the underat the openiu 's u and runncy li n be introduced between two of the wagon loadsat the point 9 if desired, though being preferably operated on the plenum, or forced drattprinciplc; the amount oi any products oi. combustion, which may enter the preliminary heating chamber quence.

wi considerable advantage of the plcnurn' system is that only a low chimney stack required for the purpose of getting rid of the products of combustion; further in the system above set forth since the products of combustion never reach the cold briquets no condensation of steam takes place, the briquetszire not harmed thereby, and greater economy of working is secured as no recvaporation of such condensation needs 5 to take place.

It must be understood that though shown in the drawings as fired by producer gas the kiln may be fired by coal dust, or the like,in which case the flue K would be the flue from a furnace, or fire place attached to the side of the kiln.

I am aware that prior to this invention tunnel kilns have been constructed having the hot- .l'lue U. A damper not enough to be of any consepreliminary heating of the incoming goods and also an enlarged combustion chamber. 1 therefore do not claim such a combination broadly; but

What I do claim as my invention is:

1. The combination, in a tunnel kiln, of a combustion chamber having a main horizontal gas inlet with an enlarged combustion zone, and an auxiliary gas inlet directed toward the air supply for the main gas inlet, substantially as and for the purpose set forth. i I

2. A tunnel kiln having a combustion chamber of large volume in proportion to the volume occupied by 'the goods, an air preheating chamber enlarged to the same or. a greater extent than the combustion chamber throughout the whole of its length, a section of kiln between the combustion. and preheating chambers restricted in cross sectional area nearlyto the space occupied by the goods, horizontal gas inlets to the combustion chamber where it joins the restricted section, means for conveying bricks through said combustion chamberand delivering the same at one end of the tunnel, and means for admitting air into said preheating chamber and the restricted section being such that the speed of the draft through the restricted area projects it a considcraoc distance into the combustion chamber before becoming mixed with the entering gas, and being such that the pas of air through the preheating chamber takes place slowly, substantially 'as de' scribed.

in a tunnel kiln, the combination of a combustion chamber having a main horizontal gas inlet, with an enlarged air heating chamber just prior to the combustion chamber, dcficctorsfor directing the air current on to the hot bricks,- and an auxiliary gas.

the delivery end of the kiln, andfiues for delivering the air in the base flue to the preliminary drying zone .of-the kiln, a1l substantially as and for the. purpose set forth.

5. In a tunnel kiln, the combination of a combustion chamber having a main horizontalgas inlet, an enlarged air heating chamber prior to the combustion chamber, de-

-flect0rs therein, an auxiliary horizontal gas delivery end of the tunnel, all substantially 1e inlet and battle walls bpening into theair asdescribed herein.

heating chamber, a top fresh air supply fine In testimony whereof I afliX my signature to the air heating chamber, a base fine, a in presence of t-Wo'witnesses.

top discharge flue prior to the drying zone,

a delivery flue from the base flue t0 the dry- EDGAR HOUSE SUTOLIFFE; ing zone, a discharge flue from the latter, \Vitnesses: and a fan delivering air into the top fresh H. D. JAMESON,

air supply flue and t0 the base fine at the H. V. PUMFREY.

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