US1251426A - Recuperative furnace. - Google Patents

Description

s. B. RUSSELL,

RECUPERATIVE FURNACE.

- APPLICATION FILED JAN. 15.19:].

1,25 1,,26. v Patented Dec. 25, 191?.

s. B. RUSSELL RECUFERATIVE FQRNACE. APP LICATIOH FILED JAN. I5, 1917.

192515426 Patented Dec. 25,1917,

@Q ZZ 2 SHEETS-SHEET 2.

UNITED? STATES rarrznr 0mm sue-s B. BUSSELL,-OF-ST. oUIsMIssoURI, ASSIGNOR To PARKER-RUsSEL MI Nm &

MANUFACTURING COMPANY,- or so. LOUIS, MIssoURI, A" CORPORATION orivns- SOUBI.

RECUPERATIVE FT'IRNACE.

Specification of Letters Patent.

ratefit'eanec, 25,1917.

Applicationfiled l'anuary 15, 1917; Serial-No, 142,431.

To (122mm it may concern:

Be it known that-L sims BENT RUSSELL, a citizen of the United States, residi'ng at St:- Louis, :Misso'uri, have invented certain new and useful Improvement in Recuperative" Furnaces, I of which: the following is a full, clear, and exact description, such as Willen'ableothers sk il led'in' the art to which it appertain s-to make and use the same; This invention relates to recuperatiye fu rnaces, and particularly to -recuperative furnames of the ty-p'e" provided -With a :gas producer 'orgenerator.

One object ofmy present invention is to provide a recuperat-ive furnace of thegeneral ty pe referred to which-'is'equipped with means ofnovel' construction fo'r heating the primary air and injecting said heated: primary air mixed with steam into T the fuel chamber-of the: gas producer insuch a manner 'th'at-there is little tendency for the fuel to ="clin keror the fuel grate 'to burnout. Another object is to provide a recuperative furnacethat is-equipped with a novel means for heating the primary' airthat' is supplied to the producer, said means-being so designed that the furnace as' an: entirety is compact and easy to build And still another object 'is' to "providea gas bench of novel design, m which'the primary air is drawn through openings formed in the-front Wall of'the-furnace, then circulated through passageways that are-heated by the Waste" fire gases escaping from the combustion chamber, and thereafter injected cable to various other types of recuperative furnaces.

Figure 1 of the drawings is a frontelevational' View, partly in Vertical cross sect on,

of a .gas bench constructed in accordmice With my invention; 1

FigsQQ and 3 arevertical' se'ctionalrvieWs, taken on the lines a 22 and 3 3, respectively,-of Fig. :1. 1

Fig. 4 -'s a fragmentary horizontal sec-.

tional View, taken on the line 4-4: of Fig. 1. Fig.2 5 isa=detail cross-sectional: View,

illustrating a slight modification of my invention and t Fig.6 is a perspective View ofone ofthe steam jets used to:in 'ect the-heated-primaryair intothefuel chamber ofthe' producerr Referringto -the drawings: :Whichi illustrate a gas bench 'constructedin accordance With-my invention, A designates the fuel chamber ofthe gasproducer of the-bench, B- designates theretorts, C the combustion chamber 1 i and D' horizontallydisposed fire gas fines through whichthe Waste gasesfrom thecombustion chamber travel in escaping to the uptake fiue 0r chimney flue E, as indicated by the arroWs'inFigsZa. The fire gas flues D are surrounded by air passage- Ways 1 through which the secondary air circulates, so that said secondary air-Will be heated before it is admitted to the "combusti'on chamber C, as'indicated by thearrows in Fig; 1,-and the furnace is alsoprovided With means of novel construction for heating the primary air and inj'ecting'it mixed with steam :into the fuel chamber A of the gas producenln the formof my invention herein shown said me'ansconsists of horizontally-disposed' fire gas flues D' that are arranged at the-opposite sides 1 0f the fuel chamber Aof the producer beneath the fire gas flues D, primary vair passageways 2 thatsurround the fire gas flues D' and steam jets or 'inj'ectingr:nozz'les 3 arranged inalinement Withports 4 formed in the-side Walls of the fuel chamber A-ofthe producer,"eitherabove'the fuel grate F, as shown in I ig, 1, -0r -=.beloW said -grate,

the arrows in Fig. 3, and thus heat'the primary air in the passageways 2 that surround said flue D, and a horizontally-d1sposed partition 5 is arranged above the fiue D,

as shown in Figs. 1 and 3, so as to prevent the primary air that circulates through the air passageways 2 from mingling with the secondary air that circulates through the air passageways l which surround the fines D. The primary air is admitted to the air passageways 2 through openings 6 in the front wall of the furnace that are provided with closures 7, as shown in Figs. 1 and 2, and each set of steam jets 3 is mounted on a steam supply pipe 8 that extends inwardly through the front wall of the furnace into the space that surroundsthe particular fire gas flue D with which it cooperates. l/Vhen the furnace is in operation the jets of steam that escape from the nozzles 3 produce sufficient suction in the primary air passageways 2 to cause the primary air to circulate through same. Valves 9 are provided for regulating the supply of steam to the pipes 8, and while any preferred type of steam jet may be used, I prefer to use steam jets of the kind shown in Fig. 6, each of which consists of a four-way pipe fitting 10 having two horizontally-aimed openings into which the supply pipe 8 is screwed, a lateral opening into which a plug 11 provided with an orifice 12 is screwed and an opening on the underside of the same into which a plug 13 is screwed, so as to form a sup porting leg for the fitting that rests upon a horizontally-disposed partition 14;, as shown in Fig. 2. The partition 14 extends longitudinally along one side of the fire gas flue D at a point above the inlet opening 6 in the front wall of the furnace through which the primary air is admitted to the air passageways 2 and below the ports 4 through which the primary heated air is injected into the fuel chamber A of the producer, so as to cause the primary air which is admitted to the space Or passageway located atthe inner side of the flue D to circulate clownwardly underneath said flue, thence upwardly and over same to the ports 4, as indicated by the arrows in Fig. 1. It is immaterial, however, so far as my broad idea is concerned, how the space or passageways 2 through which the primary air circulates are formed,so long as they are of such 2 character that the primary air will absorb heat from a fiue or fiues through which the escaping fire gases travel before said primary air reaches the port or ports through which it is injected into the fuel chamber A of the producer. It is also immaterial what particular type of steam jet is used for forcing the heated primary air into the producer, but it is desirable that the steam jets be arranged in such a manner thatthe heated primary air will be introduced into the fuel chamber of the producer at a number of separated points along the length of said fuel chamber. lVhen the primary heated air, mixed with steam, is introduced into the fuel chamber of the producer through ports 4 in the side walls of said chamber located at a point above the grate F, asshown in Fig. l, the tendency of the fuel to clinker and the grate to burn out is reduced to a minimum. If desired, however, the heated primary air mixed with jets of steam can be introduced into the producer through ports 4: formed in the side walls of the producer at points below-the grate F, as shown in Fig. 5, thee-steam supply pipes 8 in such a structure being arranged beneath partitions 14* in the primary air passageways 2 which are so arranged that the primary air which is admitted to said passageways will circulate upwardly over the fire gas flues D, and thence downwardly across the undersides of said fines to the ports P, as indicated by the arrows in Fig. 5. V

In order to eliminate the possibility of the primary air mingling with the fire gases that escape from the fiues D and also to reduce the cost of manufacturing and erectingthe furnace, I prefer to form the top and bottom walls and one of the side walls of each of the tines D, from slabs of refractory material and form the other side of said fine from special blocks or tiles m that are provided with open spaces and partitions which are so arranged that when a plurality of said tiles are arranged end to end, as shown more clearly in Fig. 2, the partitions in the same will cooperate to form the horizontally-disposed partition 14, previously referred to, and the spaces will form part of the passageway through which the primary air circulates.

\Vhile my invention is not limited toa gas bench, it is particularly adapted for use in gas benches onaccount of the fact that it enables a compact, inexpensive gas bench to be built in which adequate means is provided for preheating the primary air and injecting said heated air mixed with steam into the producer.

Having thus described my invention, what i I claim, and'desire to secure by Letters Patent', is: g I I f In a gas bench, a gas producer, a recuperator provided with a fire gas flue and a space or passageway surrounding said flue through which primary air circulates, one side of said flue being formed by blocks of refractory material having open spaces in the same that form part of said passageway, a division wall between said producer and recuperator that is provided with ports that establish communication between said producer and said primary air passageway, and a steam supply pipe supported by said blocks and provided with steam jets or injecting nOzZles arranged in proximity to said ports so as to cause the heated primary air mixed with steam to be supplied to the producer. SILAS B. RUSSELL.

Copies of this patent may be obtained tor five cents each, by addressing the Commissioner 0! Patents, Washington, D. O.

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