US1544299A - Furnace - Google Patents

Description

3 Sheets \IHITIII! \4 FURNACE J. J. ENGLISH Filed May 13 June 30, 1925.

' ATTORNEYS June 30, 1925.

J. J. ENGLISH FURNACE Filed May 13, 1922 3 Sheets-Sheet 2 INVENTOR ATTORNEYS- Patented June 30, 1925.

UNITED- sT- JOHN J. ENGLISH,-

or new YORK, N; Y. Y

' FURNACE.

Application filed May 13,-

To all whom it may concern:

Be it known that I, JoHN- J'. ENGLISH, a citizen of the United States, and resident of the borough of Manhattan, in the city and State of New York, have invented anew and useful Improvement in Furnaces, of which'the following is 'a specification.

Infurnaces of usual construction, the temperature reachedby the fire sides of furnace walls is so high that the fire bricks become soft and a small film of liquefied brick is present on the face nearest the fire. Ash, which is always present in the fuel bed, also fuses at this temperature and whenever this fuse ash or clinker comes in contact with the molten brick surfaces, a weldtakes place. Once this weld has started, it spreads rapidly, the layer thickens and a rapid deterioration of the fire bricks take'spla'ce- As this. lay-er of clinker thickens, it chokes the fire and in thecase of stoker furnaces, presents a danger of stoker destruction. Furthermore, the burning through ofthe Walls in many instances brings about the collapse of the walls with 'the possibility of serious as well as costly damage. This. formation of clinker necessitates frequent removal to prevent it from becoming a menace. To remove the clinker, the fire must be burned down and the coal on the grate is wasted. There is consequently a service loss, the loss of investment, the cost of labor. for removing the clinker" and the strain on the furnace side walls,,because of the shocks fromthe sledge hammers used in removing the clinker. Also the coolingof the walls requires more coal to bring them back to=normal temperature and the contraction and expansion, due to this frequent cooling and heating, injures the walls.-

This clinker forms at certain critical points onthe side walls where the fuel bed temperature is high and clinker abundance at a maximum.

My invention provides means for preventing this clinker formation, by the introduction of rotary side wall members at the critical points, whereby the constant changing ofthe side wall surfaces at these points eliminates entirely the formation of clinkers, thus materially increasing'the efficiency of the furnace.

My invention is particularly well adapted for use in connection with stoker furnaces, therefore I have represented my invention 1922.- Serial N0. 560,650.

as applied to an underfeedstoker furnaceof usual type.

Practical embodiments of my invention are represented in the accompanying drawings, in which a Fig. 1 represents a detail longitudinal vertical section through the furnace,- taken in the plane of the line-1&1, of Fig. 3, looking in the'direction of the arrows; certain of the parts being shown in full lines and certain of theparts in dotted lines. Fig. 2 represents a similar detail section, taken in the plane of the line IIII of Fig. 3 represents a detail transverse vertical section taken in the plane of the line IIIIII, of Fig. 1, looking in the direction of the arrows. i

Fig. 4; represents a back view of one form of a side wall membersection. h

Fig. 5 represents an'inverted end view of the same. 7 1

Fig. 6 represents a face view showing the same perforated.

Fig. 7 represents a back view of another form of side wall member section.

Fig. 8 represents an inverted end view of the same. V

F ig. 9 represents a face view showing-the SHIHQPGI'fQl'HtGClQ I V Fig. 10 represents a detail section show-' ing the means for securing the sections to their Wheeh r The fixed side walls. of the furnace are denoted by 1, 1, and the grate by 2. The fuel hopper is denoted by 3, the fuel feeding plunger by {l and the shaft of the fuel feedingmeans by 5. It willbe understood that all of these'parts are of well known construction. p f i H Recesses' 6,6 are formedin the fixed'side walls '1, l-of the furnace at the points where thereis a tendency for the-clinkers to form. These recesses extend above and below the grate'level, the tops of the recesses being ofsemicircular arched-form. Wheels 7, 7 are located within the recesses 6, (Sand-are carriedby stub shafts 8, Srotzltably mounted in theside walls of the furnace below the grate level. The side wall members are removably secured to the wheels 7 7 with their fire faces" substantially flush with the fire faces of the'fiXed'side walls1,-1, so as to forina continuation of-the said'fire walls above the grate level. These side wall mem' 11.0

here are preferably composed of annular series ofsectlons separately secured to their respective wheels 7, 7 for purposes of resage of air therethrough. 1 s 7 The inner peripheral edges of the sections 9 are providedwith lips'lO seated in the hub placement and renewal.

' These side wall member sections 9, shown .in Figs. lto 6 inclusive are of metal construction, while the sections 9* shown in Figs. 7 to 10 inclusive are of fire brick construction. These sections may be perforated as shownm Figs. 6 and 9 to permlt the pas- 11? of" the wheel 7, the outer peripheries of these sections 9* being removably secured to the peripheral rim ll of the wheel 7, by

2 suitable. fastening devices, such as bolts 15.

In both instances it is to be understood that these annular series of sections form a continuous wall member.

The means which Iihave shown for 'driv-' ing the rotary wheels 7 'Z and their side wall members from "the fuel feeding mechanism shaft 5,"is constructed, arranged and operated as follows r A cross shaft'lfi 'mounted at its ends in hangers 17 1'( is providedwith spur gears 18, 18 meshing'with pinions 19, 19 on the inner endsof'thezstub shafts 8, 8. This cross shaft 16 is provided with ratchets. 20,

I 20, engaged by pawls21, 21, carried by arms 22, 22,'loosely mounted on the'cross shaft 16', which arms are attached to the ends 23, 23, of connecting rods 24, 24, the opposite ends of which rods are pivoted at 25, 25 to crank arms 26, 26 on the fuel feeding mechanism shaft 5. Therefore, the rotary .movement of the shaft 5 will impart an intermittent rotary 'IHOVBIIIfiHl'ftO the wheels 7, 7

- and their side wall members.

The driving connection-is intended to be so proportloned as to give the required .speed of rotation to the rotary side wall members, to ensure the best results.

..-From the above description it will be seen that air is permitted to circulate in the recesses 6, 6 of the side walls 1, 1 back of the rotary side wall members. It will also be seen that the provision of sectional rotary side wall members permits the renewal and interchanging of the said sections as required, said "renewals being I accomplished when the sections are located in the air space below the grate level.

The circulation behind the rotary side wall members accomplishes to a great degree the decrease of radiation lossand keeps the fire surfaces well below fusing point.

Furthermore, as only certain portions of these rotating side wallmembers are exposed to furnace temperature at any one time, excessive heating of these portions is prevented. No portions of the rotary side wall members are above the grate level sufficiently long to become excessively heated,

the portions below the grate level being cooled by air circulation. Therefore, cool port-ions of the side wall members are continually replacing the more heated. ones. Vhere adraft space occupies the entire' space beneath the grate level, all benefits derived from air circulation are greatly increased and all heat absorbed by the'portions of th'erotaryside wall members which has come from above the grate level is returned, the air which cools them absorbing the heat which isan'aid to combustion for which the air is used. r

'By mounting the rotary side wall mew bers so that their surfaces maybe substantially flush with the fixed sidewalls, the movement of the side wall members serves to slice the fuel bed, breaking it up and ad mitting more air atthese points. Thus the fire becomes cleaner and the tendency to the formation of clinkers greatly decreases, re-' 7 sulting in the tendency ofthe clean fire to burn off any clinker aproaohingthe'wall.

It will also be noted that a space below ible for inspection, renewal, etc.

Vvhile I have disclosed only one of these 1 rotary side wall members in each side wall the grateis provided which is easily access of the furnace, it is obvious that any number of these members may be inserted that may be necessary;

l/V'hile I have particularly shown and explained this invention as applied to the side walls of a furnace,it is obvious that it be applied wherever desired. I

It is also evident that various changes may be resorted to in the construction, form and arrangement of the several parts without departing from the spirit and scope of my invention; hence I do not wish to be limited to the particular embodiments herein shown and described, but

'lVhat I claim is '1. Ina furnace, a grate, vertically disposed fixed walls, wall members having their fire faces substantially flush with said fixed walls, andmeans foractuating the wall members'to bring different parts of the fire face of each successively-into and out of operative relations with respect to the grate. f 2. In a furnace, a grate, vertically disposed'fixed walls, wall members extending above and below the grate level, said wall members having their fire faces substantially flush with said fixed walls, and means for actuating thewall members to'bring differ out parts of the fire face of each successively 10.5 i may into and out of operative relations with respect to the grate.

3. In a furnace, a grate, vertically disposed fixed walls, sectional wall members having their fire faces substantially flush with said fixed walls, and means for actuating the wall members to bring difierent parts of the fire face of each successively into and out of operative relations with respect to the grate.

4. In a furnace, a grate, vertically disposed fixed walls, sectional wall members extending above and below the grate level, said wall members having their fire faces substantially flush with said fixed walls, and means for actuating thewall members to bring different parts of the fire face of each successively into and out of operative relations with respect to the grate.

5. In a furnace, a grate, vertically disposed fixed walls, rotatable wall members having their fire faces sucstantially flush with said fixed walls, and means for rotating said wall'members, to bring different parts of the fire face of each successively into and out of operative relations with respect to the grate.

6. In a furnace, a grate, vertically disposed fixed walls, rotatable wall members provided with series of removable sections, the fire faces of said sections being substantially flush with said fixed walls, and means for rotating the wall members to bring different parts of the fire face of each successively into and out of operative relations with respect to the grate.

7. In a furnace, a grate, vertically disposed fixed walls, rotatable wall members provided with series of removable perforated sections, the fire faces of said sections being substantially flush with said fixed walls, and means for rotating the wall members to bring different parts of the fire face of each successively into and out of operative relations with respect to the grate.

8. In a furnace, fixed walls, movable sectional wall members extending above and below the grate level, and means for rotat ing said members to bring successive sections above and below the grate level.

9. In a furnaceffixed walls having recesses, wheels located in said recesses, wall members carried by said wheels and forming continuations of said fixed walls, and

successive sections of the wall members above and below the grate level.

11. In a furnace, a grate, fuel feeding means, vertically disposed fixed walls, and rotatable wall members driven from said fuel feeding means, to change the relations of the parts of the fire face of each member with respect to the grate.

12. In a furnace, a grate, fuel feeding means, vertically disposed fixed walls, and rotatable wall members extending above and below the grate level anddriven from said fuel feeding means, to change the relations of the parts of the fire face of each member with respect to the grate.

In testimony, that I claim the foregoing as my invention, I have signed my name this 1st day of May 1922. 7

JOHN J. ENGLISH.

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