US1600484A - Furnace - Google Patents

Description

- maman Sept. 21 1926.

M. J. OWENS FURNACE Filed sept. 2o, 1924 2 sheetsfsvheet- 1 R D .T N E V. N

sept; 21', 1926. 1,600,484

l v M. J. OWENS FURNACE A Filed sept. 2o, 1924 1 2 sheets-sheet 2` HIS HTTRNEY 16 takes A maintained by meais of a stack or chimney Patentea sept. 2i, 192s.

uNiTlsz-DV Astares Param oFFica,

MICHAEL OWENS, DECEASED, LATE OF TOLEDO, OI-IIO; :BY HAZEL O. BEESCH, JAMES C. BLAIR, .AND JOHN H.. MCNERNEY,

ADMINSTRATORS, OF TOLEDO, OHIO, AS-

SIGNORS THE OWENS BOTTLE COMPANY, F TOLEDO, OHIO, A CORPORATION 0F OHIO.

` rUBNAcE The invention is herein shown in connection with a glass meltingtank furnace. In such furnaces, it is customary to admit fuel -gas and atmospheric air in suitable -proportions into the furnace, where combustion place. A circulation of the air is through which the burnt gases or products of combustion are carried oif. In such an arrangement, the 'draft varies considerably,

, owing to dail variations in the temperature of the outsi e air and also to changes in weather conditions. As the'outside temperature lowers, the draft through the stack correspondingly increases, so that the gases are s drawn through and beyond the' melting lchamber before 'complete combustion has taken place. On the other hand, a rise in temperature may reduce the draft to such an extieritthatv the amount of air supplied tothe draft by dampers in the smoke stack, but

it is. ,practically impossible to get the average workman to properly regulate such dampers This difiiculty is increased by the -fact that there are different shifts of work;

40. men, usually three, every twenty-four hours, so that the regulation cannot be left in charge of any one person.

1n accordance with the present invention, there is provided within the air circulating system, a draft blower preferably `between 'the furnace and the stack. This blower is run continuously at a constant speed, so that a substantially constant draft is maintained independently of atmospheric conditions, thereby securing uniform combustion and heat conditions within the furnace. This blower may be an induced draft blower operable to draw the air from the furnace and force it toward the smoke stack. In its preferred form, the invention also includes a forced draft blower in the air circulating system, by which air is forced-into the furnace, thereby assisting in` maintaining constant and uniform conditions of combustion within the furnace.

A further feature of the invention relates to the arrangement whereby the air for combustion is drawn from the bridge wall or narrow confined space usually provided between the melting tank and refining tank of a glass furnace. 'This further contributes to the general result of maintaining a sub- Figure 2 is a sectional view of the revers? valve.

igure `3 is a detail View of a throttle valv Figure 4 is a View similarto Figure 1,

but showing a modification in which a recuperator is used.

Figure 5 is a fragmentary sectional view .at the line V-V on Figure 4.

The furnace comprises a melting tank 1,0 and a refining tank 11 separated by a bridge wall 12, the latter providing a narrow space 13 between the two tanks or compartments. A roof 14 extends over -vthe entire furnace .and kprovides a confined space 15 over the ously at a constant speed. 'forces the air through a i duit to the checker chamber 27 of a regenerative construction. lThe air 1s heated 1n ltsl passage.` through the checkerwork in the chamv i ,beg` v27 and then passes through conduits 28 l and`29 to the interior of the 'furnace where it is mixed with the fuel gas and burns within the space 15. The burnt gases pass from the furnace through conduits 30 and 31 to and through the checker chamber 32. The gases in the checkerwork therein and then pass through the conduit 26 and past the reversing valve 24 to an exhaust conduit 33 leading to an induced draft blower 34. This blower is run continuously by an electric motor 35 at a constant speed and in a direction to draw the burnt gasesthrough the exhaust conduit 33 and force them upwardly through the smoke stack or chimney 36. The reversing valve 24 is periodically reversed at regular intervals, thereby reversing the direction of flow through the furnace and through the checker chambers 27 and 32. Each reversal causes the fuel air to pass through the checker chamber which has been,

heated by the spent gases which have been passing through such chamber justprior to such reversal.

By drawing the air from the passage 13 in the bridge wall, which airis quite hot and is of much more nearly constant temperature than the outside air, an'economy of fuel is effected. Also, a more nearly cons/tant temperature is maintained. A circulation of air through the space 13 is also maintained, which materially assists in preventing overheating of the bridge wall.

Under some conditions, satisfactory results maybe' obtained by omitting either the i induced draft blower 34 or the forced draft blower 18. 4The use of both blowers, however, lin combination, gives more reliable and uniform results under widely varying conditions.

Fi ures 4'and 5 illustrate my invention as applied to a glass furnace having a recuperator 40, .or recuperators on one or both sides of the glass furnace. The air passing through the forced draft blower 18 is forced through a pipe 41 into a chamber 42 within the recupera or 40. From thence the air is conducted through passageways 43 into the main furnace where combustion takes place.

furnace, which may be of usual4 passing through this chamber, heat The gases of'combustion pass from the furnace through a passageway through the recuperator to a conduit 45 lead- .infA to the induced draft blower 34. The

44 back into and channel, whereby fresh air enters directly from the atmosphere into said channel; is

heated therein and is drawn from thence into the circulating system.

' 2. A furnace comprising a melting chamber and a refining chamber separated by` a bridge wall havingl an air space or channel therein, and pipes leading from said channel and communicating with the interior of the furnace for supplying air for combustion.

3. A furnace comprising a melting chamber and a refining chamber separated by a bridge wall having an air space or channel therein, a blower, a pipe leading from said channel to the blower, and means providing a passageway leading from the blower to the interior of the furnace. i 4. The combination of a furnace tank, a regenerative furnace comprising checker chambers on opposite sides of the tank and communicating with. the tank, an air circulating system comprising a channel formed in the tank walls and opening directly into the atmosphere, conduits leading from said Channel to said checker chambers, a revers- King valve in said system by which the airis directed alternatively to said chambers,

and a forced draft blower located in said air system between said valve and said channel.

5. The combination of a furnace tank comprising a melting chamber and a refining chamber separated by a bridge wall having an air space or channel therein, a regenerative. furnace, a conduit leading from said channel to the regenerative furnace for conducting heated air to said furnace, and means for conducting the air from the said furnace to the interior of said tank.

6. The combination of a furnace tank comprising a melting chamber and a refining chamber separated by a bridge wall having an air space or channel therein, a regenerative furnace, a conduit leading from said channel to the regenerative furnace, a blower in said conduit, and means providing a passageway leading from the regenerative furnace to the melting'clliamber.4

7. The combination of a furnace anda circulating system through which air for combustion is circulated,'said system comprising' a conduit leading from a source of fresh air suplly 'and communicating with the interior of t e furnace, a forced draft blower located in said conduit and operable to draw fresh air therethrough and force it into the fur-- nace, a conduit leading from the furnace for carrying off the spent gases of-combustion, a chimney with which said last mentioned 10 conduit communicates, and an induced draft blower located Within ysaid last mentioned conduit and-operable to draw the gases from the furnace and force them into the chimand State of Ohio,'this 13th day of'Septem-.

ber, 1924.'

HZEL O.BEESCH, JAMES C. BLAIR,

i vJOHN H. MCNERNEY, Administrators of the Estate of Michael J.

Owens, De/ceased.

Y v A v Signed at Toledo, in the county of Lucas 15

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