US984979A - Smoke-consuming furnace. - Google Patents

Description

W. E. SUDLOW & 11.1. WHITE.

SMOKE GONSUMING FURNACE.

APPLICATION FILED OUT; 5, 1909.

984,979. Patented Feb.21, 1911.

3 SHEE'IB-BHEET 1.

185 Ncmms PETERS C0,, WAsHlncrorv, n. c.

W. E. SUDLOW & H. J. WHITE.

. SMOKE GONSUMING FURNACE.

APPLICATION FILED 0013.5, 1909.

' 984,979. Patented Feb. 21, 1911.

3 SHEETS-SHEET 2.

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SMOKE OONSUMING FUENAOB. APPLICATION FILED 001'. 5, 1909.

Patented Feb. 21, 1911.

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WILLIAM E. SUIDLOVV, OF WASHINGTON, AND HENRY J. WHITE, 0F AUGUSTA, GEORGIA.

SMOKE-CONSUMING FURNACE.

Specification of Letters Patent.

Application filed October 5, 1909.

To all whom it may concern:

Be it known that we, TVILLIAM E. SUDLow, a British subject, and HENRY J. WHITE, a citizen of the United States, residing, VVIL- LIAM E. SUDLow, at \Vashington, Georgia, and HENRY J. WHITE at Augusta, Georgia, have invented new and useful Improvements in Smoke-Consuming Furnaces, of which the following is a specification.

This invention relates to smoke consuming furnaces, the object of the invention being to provide a construction of furnace whereby a more perfect combustion of fuel and elimination of carbon, or as it is commonly termed, smoke is effected, by causing the unconsumed gases after leaving the fire bed to be directed into' contact with highly heated surfaces of fire-resisting material be fore allowing the same to come in contact with any portion of the boiler, whereby the gases are thoroughly heated and caused to ignite, thereby eliminating the smoke nuisance, economizing in fuel and also greatly increasing the life and durability of the boiler.

With the above and other objects in view, the nature of which will more fully appear as the description proceeds, the invention consists in the novel construction combination and arrangement of parts as herein fully described, illustrated and claimed.

In the accompanying drawings :-Figure 1 is a central vertical longitudinal section through a smoke consuming furnace embodyingthe present invention. Fig. 2 is a plan view thereof, partly in horizontal section. Fig. 3 is a front elevation of the furnace, partly in section.

The furnace is constructed out of fire brick or other suitable fire-resisting material and comprises the side walls 1, front wall 2, rear wall 3 and in the construction shown in Fig. 1, the furnace also comprises a bridge wall 4 located at the usual point and forming the back wall of the fire box.

5 designates the furnace grate beneath which is the ash pit 6.

7 designates a plurality of fuel openings and 8 other openings leading to the ash pit.

Extending back from the top of the bridge wall 4 is an elevated floor 9 which reaches to the rear wall 10 of the furnace and is supported at intervals by additional walls 11. Extending over the floor 9 is an arch 12 or in other words, a transversely curved wall which is arranged beneath the boiler 13 and extends lengthwise of the boiler as shown in Fig. 1. In the preferred embodiment of the invention, an inverted arch or transversely curved wall 14 is interposed between the wall 12 and the bottom of the boiler, as best illustrated in Fig. 3, thereby forming an arcuate space 15 along which the thoroughly ignited products of combustion pass in their first contact with the shell of the boiler. The walls 12 and 14 preferably meet or merge into each other, as shown at 16 in Fig. 3, whereby they mutually brace and support each other.

The two arches above described terminate a sufficient distance in advance of the rear wall 10 to leave an opening 18 up through which the products of combustion pass in entering the arcuate space 15. Between thefioor 9 and the arch 12 are baflle walls 19. These walls extend vertically between the floor 9 and the arch 12 and project from the opposite side walls 1 inward part way across the space between the side walls, as indicated by dotted lines 19 in Fig. 2, thereby causing the products of combustion to take an irregular course in passing for the first time lengthwise beneath the boiler, the arches 12 and 14 preventing the gases at such time from coming in contact with the boiler shell. The bridge wall, as well as the floor 9 and the arches 12 and 14 and the baffle walls 19 soon become highly heated and as a result, by reason of the gases impinging against the said highly heated surfaces, they are ignited before passing through the space 18 and coming in contact with the boiler 13, as they move along the arcuate space 15.

Upon reaching the front end of the furnace, the products of combustion enter the front connection or chamber 20 and pass thence rearward through the fines of the boiler into the rear connection 21, the front of which is defined by the rear end of the boiler and the rear wall 10 of the furnace, the area of this rear connection 21 being large in comparison with the area of the stack or the passages leading from the furnace to this chamber, it follows that any soot carried as a solid suspended in the moving gases will be deposited at this point where the said gases will move at a much slower rate than at any other point of their travel from the furnace to the stack.

The rear connection or chamber 21 is pro vided at or near its center with a dividing battle wall 22 reaching to the top of the being provided with a blow-off pipe 27 while- -Jthe upper header 26 has leading from the chamber 21 andterminating above thebot-- tomfthereof as. shown inFig. 1,.causing the,

productsvof combustion after leaving the V fines of the boiler to pass downward on one 7 side of the wall 22 and then upward on the opposite side thereof between said wall and the rear inclosingwall 23.0f the back cham- V .ber 21'.

Within the chamber 21 there is arranged a feed water pipe heater, comprising a number of vertical water tubes 24: connected at their upper and 'lowerends to horizontal 'pipes 25, the pipes 25 being in turn connected to headers 26 arranged at the top andbottom of the heater, the lower header 26 opposite ends thereof, pipes 28 and 29 which communicate with a common feed water pipe 30 that enters the boiler at 31 and is connected by an elbow 32 to a horizontally disposed distributer or spray pipe 33 having a number of perforation's34=.- This distributer or spray pipe '33 extends horizontally within the boiler about. two inches 'abovethe tubes or flues of the boiler so that v it'isalways covered with water. i

In addition to its function of supplying 'feed water' to theoboiler, the'construction,

above described provides for blowing ofi, the

boiler periodically as needed, the. perforati'onsSt acting to draw the scum from thesurface of-the water and blow the same outward through the connections described. 7 35,design'ates,,a bottom blow 0H pipefor Lille boiler which passes up through the rear end wallr3; of thefurnace and enters the boiler... re

r e 35 designates a feed water pipe entering the lowe'r'header 26 of the-heater.

361 designates an outlet orifice for the V productsof combustion, in connection with j which a' suitable stack may be-.employed.- The boiler may be supported in the'masonry. in any convenient or usual manner and may be, provided withside supporting lugs 37 for that purpose, although, any other means may be employed for suspending or'supporting the boiler out of contact with" the heated fire-resisting surfaces; If desired, a-

doori38-maybe provided in the front wall of ,thejfurnace to give access to the adjacent endof the boiler forcleaning and repairing.

The boilermay alsobe provided with the usual number of manholes 39.1

7 By reference'to-Figs. 2' and 3, itwillbeobserved that the sidewalls ofthezfurnace are providedwith fresh air passages 40 leading from the top downward andending in elbows or 130M841 which, lead into the ashpit V beneath the grate,,asshown in Figs. 1 and 3, the said assages being, adapted to be closed cut 0 s 42 {shown in Fig. 3. The baffle walls119 are also provided with air ducts43 opening into the space between the floor '9 arch l2and supplied the airpassing downthe side passages 40 above referred to.

The side walls, the arch or arches, the bridge walland theprojectin baiiie wall, all being removed from the cooling influence of the boiler itself may be intensely heated" by the combustion of fuel in the furnace and gas the temperature of the ases thrown off from the fuel changes, falling by reason of theopening of the furnace doors for the ap-' plication offresh fuel,'orthe cleaning of the fire, or rising when the combustion of the fuel is perfect, these structures will deliver heat to the passing gases when the gases'are cooler than said structures or walls, and said walls will absorb heat from the gases when the latter are hotter than the walls,.resulting in more constant even temperature of the gases at the point wherethey strike the i boiler and also resulting in the ignition of p,

the partly consumed ases thrown off by the furnace. at period of ow temperature.

'As smoke, so called,' is the result of imperfect combustion, said imperfect combustion being'the result of lower furnace temperatures, and as. the structures or Walls aforesaid will impart heatto'the gases at such periods of lower furnace temperature, it follows that the quantity of smoke issuing from the stackcwillbe diminished and also;

that more water will be evaporated per pound of coal burnedthan wouldbe the result with furnaces constructedin the usual mm, A

ner. The more perfect combustion ofifuel will also result in a lesseneddeposit of soot in the boiler tubes or flues producing greater boiler. economy. It will also be seen that water enters the heater at the bottom and rises through the system of pipes and is delivered into the top of, the boiler and 'distributed through the spray pipe which is abovethe top of the tubes or fiues. As the combined area of these verticaYheater tubes,

is much greater than the area of the feed pipe supplying them, the waterwill flow very slowly through the heater tubes, and the water being heated by the furnace gases, the

mud and other suspended matter in the water.

willbe precipitatedand sink to the bottom end of these tubes and collect in the mud to the'boiler.

W e claim 1. A smokeconsumingfurnace comprising in combination w1th a'boiler and fire box, a

drum. Therefore, when the feed. water I 1 2 5 pleted, feed. water mustbe supplied promptly transversely curved wall of fire-resisting material extending lengthwise of and beneath the boiler and forming a heating flue for the products of combustion, and vertical bafiie walls projecting alternately from the opposite side walls of the furnace partially across the space under the curved wall, and also forming supports for said curved wall.

2. A smoke consuming furnace comprising in combination with a boiler and fire box, two transversely curved walls of fire-resist.- ing material, curved inversely to each other and extending lengthwise beneath and spaced from the boiler and also located above the fire box and forming a heating flue for the products of combustion.

3. A smoke consuming furnace comprising in combination with a boiler and fire box, two transversely curved walls of fire-resisting material curved inversely to each other and extending lengthwise beneath and spaced from the boiler and also located above the fire box, and vertical baffle walls projecting alternately from the opposite side walls of the furnace partially across the space beneath said curved walls.

4. A smoke consuming furnace comprising in combination with a boiler and fire box, a

transversely curved wall of fire-resisting material extending lengthwise beneath and spaced from the boiler and also located above the fire box, and vertical bafiie walls projecting alternately from the opposite side wall of the furnace partially across the space under the curved wall formed with fresh air ducts therein.

5. A smoke consuming furnace comprising in combination with a boiler and fire box, side walls provided with air passages leading to the space under the grate, means for opening and closing said passages, a transversely curved wall of fire-resisting material extending lengthwise beneath and spaced from the boiler and also located above the fire box, and baffle walls projecting alternately from the opposite side walls of the furnace par tially across the space under the curved wall and formed with air ducts.

In testimony whereof we aifix our signatures in presence of two witnesses.

WILLIAM E. SUDLOW. HENRY J. WHITE.

Witnesses:

HARRY SUDLoW, GEO. M. CARL.

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