US1583436A - Furnace for the combustion of fuel - Google Patents

Description

-May 4 1926. y1,583,436'

J.. s. ATKINSON FURNAGE FOR THE COMBUSTICII '0F FUEL Filed Nov. s, 192s s sheets-Sheet 1 I NVENTOG:

May 4 1926. 1,583,436

J. s. ATKINSONl mmc: Fon 'mE comausnou or mm.

Filed No'v. s,- 1923 l 3 sheets-sheet a INVENTORv 5691455 7%317/VJ9M ATTORNEYS.

May 4 1926.

1,583,436 J, s. ATKlNsoN mums Fon THE cmusnon oF rimp- Filed Nov :s 1923 INVENTQR ATTORNEYS.

Britain,

Patented May 4, 1926.

UNITED STATESv j 1,583,436 PATENT OFFICE.

JAMES S. ATKINSON, 0F LONDON, WESTMINSTER, ENGLAND, ASSIGNOB TO SOCIT ANONYME DES APPAREILS DE MANUTENTION & FOURS STEIN, OF PARIS, FRANCE.

A CORPORATION 0F FRANCE.

FURNACE FORl THE COMBUSTION OF .Application filed November 3, 1923. Serial No. 672,628.

To all whom it may concern:

Be it known that I, JAMES nINsoN, a subject of the King ain, residing at London,

and having post-office address 47 Victoria Street, in the said city, have 1n'- vented certain new and useful Improvements in Furnaces for the Combustionpf Fuel; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as Willpenable others skilled in the art to which it appertalns to make and use the same. u

This invention of improvements in or 1n connection with furnaces for the combustion of fuel has reference, in particular, to furnaces for the destruction of city or other STANLEY A 'rof Great Brltrefuse, but is also applicable in connection with furnaces for the combustion of other solid fuel. The term fuel employed herein is intended to cover and include city or other refuse or other solid fuel.`

The invention has chiefly for its object the provision of improvements by which the combustion of fuel shall be effected 1n an improved and more efficient manner.

A furnace for the combustion of fuel, 1n accordance with this invention, comprises a slotted or otherwise perforated and jacketed fuel carrier, a combustion chamber connected to one end of the fuel carrier and means for the supply of fuel tothe same' end of the fuel carrier, an ash or clinker receiver disposed at the other end of the fuel carrier,

- and therefrom to the fuel through the slots or other perforations of the fuel carrier and means to impart movement to the fuel carrier to cause the thereof to the other.

In a modification of the means set forth, the ash or clinker discharge end of the fuel carrier is connected by a flue with a combustion chamber or apparatus to be heated and means, such as a damper'or dampers, are provied to control the flow of hot gas and products of combustion through said fine.

In the preferred form of the invention, the Whole of the products of combustionl of the fuel flow to the combustion chamber in a direction opposite to that of the movement of the fuel along the fuel carrier, andv in the modified form of the invention, the flow of Westminster, Grreat-y means to supply air to the jacketfuel to travel from one end` the products of combustion may be controlled Vand regulated in such wise that the flow is as in the preferred form or is divided into two streams, one flowing in the same direction as that of the movement of the fuel along the fuel carrier and the other in the opposite direction.

The fuel carrier preferably comprises a slotted or otherwise perforated cylinder or truncated cone, though it may comprise a slotted cr otherwise perforatedi'trough or channel like member. The fuel carrier is mounted with its longitudinal axis inclined to thev horizontal and the fuel, which is delivered to the upper end thereof, is caused to move downwardly along the fuel carrier by imparting rotary, oscillatory, rocking or other movement thereto. The air for cornbustion is supplied to the jacket and passes from thence to the fuel through the slots or other perforations in the fuel carrier passing, preferably, only through the slots or perforations that are covered with fuel. In addition to air, steam may also be supplied -to the jacket and from thence to the fuel.

In order that the invention, the nature' and objects of which have been set forth, 'may be readily understood, reference will now be made to the two constructional em bodiments illustrated in the accompanying drawings, in which:

Figure 1 is a longitudinal sectional View of one constructional embodiment of a furnace for the destruction of refuse, combined with a water tube steam generator of the VVoodeson type and an air heater;

Figures 2 and 3 are cross sectional views on the lines of Fig. l;

Figure 4 is a longitudinal sectional view of a modified construction of furnace;

Figure-5 is a cross sectional view on the line C-C of Figure-4.

Now referring specifically to the dran'- ings:

l is a briclwork structure that is 'divided A-A and B-B respectively,

into an upper compartment 2 and a lower compartment 3 by a horizontal partition 4. The upper compartment 2 constitutes a combustion chamber and contains elements of'a water tube steam generator, as also an air heater 5, which latter is of any well known construction. Inthe air heater 5 diagrammatically illustrated, the hot gases from the take.

combustion chamber 2 enter the upper end, flow downwardly. and pass from the lower end by a duct or flue 6 to the chimney or up- The lower compartment constitutes, inter alia',

7 is a chute, external to the-structure 1,

vto the upperV end ofwhich fuel is supplied and by which -it is delivered. to the outer c nd of a horizontal duct 8 that extends l' through stroke varying means 11 of well' through the outer wall of the structurel within the portion of the compartment 3 that contains the fuel carrier hereinafter described and its appurtenant parts. Thefuel supplied to the duct 8 through the chute 7 is delivered on to the fuel carrier by a pusher 9 thatis operated bya crank 10 constituted as or carries the circular rack.

The mounting of the cylinder 12 is such that itslongitudinal axis is inclined to the horizontal. The-upper end of the'cylinder 12 is contained within anl opening in a wall "17 and the lower end extends through an opening in a wall 18. The walls 17-18 divide the lower compartment 3 into three parts or compartments, of which the central compartment constitutes a container for the fuel carrier 12 and its appurtenant parts,

and the outer compartments a flue 19, which is in direct connection with the combustion chamber 2, and a duct 20, which forms anl extension or continuation of an ash or clinker receiver 21. The fiue 19 and duct 20 are also in direct connection with the interior of the fuel carrier 12. The ash or clinker receiver 21 is watersealed and the ash or clinker is removed therefrom by a conveyor 22. The ash or clinker receiver 21 maybe cut off from connection with the duct 2O by a valvef23 that is operated from the exterior of the structure 1. The duct 8 eX- tends across the fiue 19 and is water lcooled.` The cylinder 12 has a slotted or otherwise perforated lining 24 that constitutes with the cylinder 12 a jacket 25. The jacket 25 j extends only for a portion of the length of j a chamber for the fuel carrier and.` vappurtenant parts.

in connection at one'end 27 in the jacket 25. It will be seen from Figure 2 that the casing 29 extends around the upper and side portions of the cylinder 12., Below the cylinder 12,'the casing 29 is continuedas a plurality of funnel like extensions A31, each corresponding to a division of the casing 29. Each funnel likeextension 31 and its corresponding division of thecaslng 29 is divided from one another by stoppers or closure members 32. These closure lmembers 32 are initially set to shut olf as large a section of casing 29 as desired, air

being supplied throughv pipes 33, as described later and passing through the perforated lining 24 to the fuel. The air entry zonemay thusl be restricted to meet the requirements of different fuels. Each funnel like extension 31V is connected at its smaller end with a pipe 33, that is controlledv by a valve 34. Each of the pipes- 33 is connected with the outlet of 'a lfan or blower, not shown, the outlet of the air heater 5 or with -the atmosphere directly. Instead of a plurality .of fans or blowers being employed, a single fan or blower may be used and its outlet connected to the several pipes 33. Steam lpipe connections may be made with'one or more of the funnel like extensions 31" so that steam may be supplied either alone or conjointly with the air to a` division or divisions of the jacket. 35 is a pipe connected at one end with a fan or blower and at the other end with the ash or clinker receiver 21 above the water seal. 36 is another pipe with the upper part of the ash or clinker vreceiver 21vand'at its other end with one of the-funnel likeextensions 31. 37 are rin s that are mounted and spaced apart withln the cylinder 12; in the embodiment illustrated, the rings 37 the inlet of which is connected withl are spaced so as to coincide with the parti- .j

tions 27 of the jacket 25. 38 isanother ringplaced adjacent to the lower end of the cylinder. The rings 37 are shown as of like dimensions, the -ring 38 being of smaller dimensions.

From the foregoing description, it will be understood that fuel which is delivered to the upper end of the chute 7 passes to the duct 8 and is delivered therefrom by the pusher 9 on tothe imperforate hearth 26 from which it passes on to the jacketed portion of the cylinder 12 and is set into combustion, the air, preheated or not, for cornbussen of the fuel being vsupplied bj um fan or fans or blower or blowers through the pipes 33, and, it may be, also through the pipe 35, ash or clinker receiver 21 and pipe 36, to the funnel like extensions 31 from which it passes to and through such compartments of the jacket 25 as are in communication therewith to the fuel -within the fuel carrier. The supply of air to each divi- 4sion of the jacket is regulable independently.

The fuel is caused by therotation and inclination of the fuel carrier to travel from end to end thereof, the ash or clinker being .discharged at the lower end and falling into the receiver 21. The air .that is passed through the receiver 21 isgheated by contact with the ash or clinker. The products of combustionof-the fuel flow from the upper end of the cylinder 12, enter the flue 19 and pass from thence to the combustion chamer 2. I

The fuel While `onthe imperforate hearth 26 is subjected to a drying action, and, it may be, to partial burning. The rings 37 vary the number or positions of the jacket compartments that receive air from the funnel like .extensions 31. The volume of air supplied from each funnel like extensionl to the jacket vcompartments in connection therewith is controllable by the valves 34 and the supply may be so regulatedthat the whole of the fuel is completely .consumed in the fuel carrier. Or the air supply may be regulated so that the plant works in manner somewhat analogous to a gas-producer,'the whole or a portion of the fuel being gasiied, the gas being burnt in the combustion chamber 2 and any partially gasied or unconsumed fuel being consumed on the fuel carrier. Further the air pressure or supply may be such that line dust contained'in the fuel is blown therefrom and passes to the combustion chamber 2 where it is burnt in manner similar to powdered fuel.

In the modification illustrated in Iigures 4 and 5 the duct 20 is connected by a flue 40 with the combustion chamber 2, a damper 41 being placed in said ue and dam ers on either side of the lduct 8 to control t e connection of the flue 19 with the combustion chamber 2. The iiow of vthe products of combustion may be controlled and caused to pass wholly to the combustion chamber 2 through theiiue 19 or partly through the flue 19 and partly through the ue 40.

Claiins: 1; In a furnace, a perforated fuel carrier vleading thereinto, an, airjacket surrounding said carrler, means for supplylng au' thru'v` said jacket and into said'carrier at non'- communicating areas along the length of said carrier.

2. In -a furnace as defined in claim 1,

transversely extending partitions for dividing the carrier -into communicating compartments.

3. In a furnace as defined in claim 1, transversely extending partitions fordivding the carrier into communicating compart- Aments, the different areas for air entry communicating with the carrier compartments.

4. In a furnace as defined in claim- 1, means for regulating the supply of air de'- livered to eac area.

5. In a furnace, a perforated fuel carrier leading thereinto, an air jacket surrounding said carrier, means for supplying fuel to the receiving end of said carrier, means for dividing the air jacket into longitudinally and transversely extending Lcompartments, means for leading air thru'the jacket compartments into said carrier, and means for controlling the supply ofv air delivered to each jacket compartment.

6. In a furnace as defined in claim 1,' means for dividing the air vjacket to limit the area of air supply-circumferentially.

7. A furnace for the combustion .-of fuel comprising a perforated carrier extending into the furnace, a jacket surrounding ythe carrier, means forrotating thejcarrier, fuel 4 feeding means at the receiving end of the carrier, an ash receiver at the other end thereof, a combustion chamber, and means for leading a current of air through the jacket and carrier and dischargingthe air from the carrier into the combustion chamber.

comprising a multi-chambered perforated carrier extending into the furnace, means for feeding fuel to the receiving end of said carrier, means for rtating said carrier, an

ash receiver at the discharge end of said carrier, a jacket surroundlng sald carrler, a

8. A furnace for the combustion of fuelI combustion chamber, means for leading af current of air through said jacket and into' said carrler, and discharging the air from the carrier into said combustion' chamber, and means for regulating the supply of air delivered to each compartment o the carner.

. In testimony whereof I aix mly si ature. J I SUN.

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