US1801398A - Gas producer - Google Patents

Description

April 21, 1931.

F. H. TREAT GAS PRODUCER Filed Deo. 2l 1924 6 Sheets-Sheet l MMM APIil 21; 1931 F. H. 'TREAT 1,801,398

GAS PRODUCER Filed Dec. 2, 1924 6 Sheets-Sheet 2 April 21, 1931. F, H, TREAT 1,801,398

GAS PRODUCER Filed Dec. 2, 1924 6 Sheets-Sheet 3 INVENTOR 7W fis/.1-

. y u1 muy A April 21, 1931. y F. AH. TREAT GAS PRODUCER Filed D ec. 2 -1924 6 sheets-sheet 4 HAWNML April 21, 1931. F H' TREAT 1,801,398

= GAS PRODUCER Filedweo. 2, 1924 6 sheets-sheet 5 INVENTOR pril Zi, 1931. H, TREAT 1,801,398

GAS PRODUCER l Filed Dec. 2, 1924 6 Sheets-Sheet 6 INVENTOR Patented Apr. 21, 1931 FRANCES H. TREAT, OF BELLEVUE, OHIO, ASSIGNOR OF ONE-HALF TO DUFF 'PATENTS COMPJNY, ENC., Ol? TTSB'RCTH, PNNEZLTANA, f2. CORPORATGN 'QF PENNSYL- VAN 1A; GRCE E. TREAT illDlYIfltfiTR- -SID E. TREAT, BECEASED GAS PRODUCER Application filed December 2, 1924.*'Seria1 No. 753,433.

rllhe present invention relates to gas producers, and more particularly to gas producers of the type having vmechanical means for supplying fuel to the fuel bed and for YaGitatir-G the fuel bed.

H retifore, in the operation of gas producers in which the fuel is supplied to and distributed over the fuel bed mechanically, it has been the practice to supply the moisture for the blast in the form of steam generated exteriorly of the gas producer. The heat required for producing this steam amounted to about ten per cent of the total heat consumption in the operation of the gas producer. The water for cooling the agitators and the feeding and distributing means, as well as the water for the water seals at the top ofthe producer, when it became heated to such an extent that it was no longer effective for cooling, was allowed to run to waste.

By the present invention l provide a gas producer of the mechanically operated type having provision for supplying themoisture to the blast by drawing the air for the blast over the surface of the cooling water. This not only serves to maintain the tempera-ture 'of the cooling water low, and thereby reduce the wastage of water by increasing the time interval between changes of the cooling" ter, but also eliminates the necessity for producing steam by external heat and mixing such steam with the air supplied to the blast. This method of operation materially reduces the operating cost of the producer. ln the specific embodiment of the invention hereinafter described l provide an exhaust fan which draws the air in over the cooling water A,at the top of the gas producer and supplies it, laden with moisture, to the tuyres or grate members. Y

ln the drawings Figure 1 is a vertical sectional view through a gas producer embodying a preferred form ofthe present invention;

Figure 2 is a vertical sectional View of the gas producer taken on a plane approximately at right angles tothe plane of the section shown in Figure l;

Figure 3 is, a plan view, on a largerscale,

of the rotatable fuel feeding and agitating top of the producer;

Figure 4 is a plan view of the rotary distributor forming a part of said rotary top;

Figure 5 is a vertical section on the line V-V of Figure 4;

Figure 6 is a plan view of the rotary distributor with its cover plate removed;

Figure 7 is a view, partly in section and partly in elevation, of the parts shown in Figure 6;

Figure 8 is a detail view partly in section and partly in elevation, on a larger scale, of one of the agitators;

Figure 9 is a plan view of t ie scraper meinber and guard ring carried by the upper end of the fuel chute, and

Figures lO and 1l are, respectively, a plan view and side elevation of the motor and fan arrangement for sujjplying the blast.

Referring to Figures l and 2, the gas producer constituting the illustrated embodiment of the present inventionY comprises a producer body in the form of a metal shell 2 having a suitable gas ofi-take 3, the body and olf-take having linings 4 and 5 of refractory material. The body is supported by means of columns 6 of which only one is shown, preferably of structural steel, one of said columns being illustrated in dot and dash lines in Figure 2.

Beneath 'the shell 2 is a stationary ash pan 7 into which a mantleor apron 8, forming an extension ofthe shell 2, depends to a distance below the water level of the pan suflicient to provide the usual water seal. Tuyeres or grate members 9 project inwardly through the depending mantle or apron and are removably seated in openings therein. These tuyres or grate members are uniformly spaced around the periphery of the base or shell 2 and project radially inwardly to near the axis of the shell. The construction and arrangement of the parts 7, 8 and 9 are preferably the same as shown and described in my Patent, No. 1,469,399, granted October 2, 1923.

The shell 2 projects a substantial distance above its lining 4 andhas an annular upwardly and inwardly sloping cover member 10 secured at its outer edge to the inner surface of the shell adjacent the top edge of the lining 4. This cover member has an annular vertical flange 11 at its inner edge, the upper edge of said flange being substantially in the .same plane with the upper edge of the shell 2. The cover member l0, flange 1.1 and the portion of the shell 2 which projects above the cover member forni an annular trough 12 adapted to be filled with water for coolingr the upper portions of (he gas producer and to provide a water seal between the body and top during relative rotation therebetween.

An outer meta-l shell 13 surrounds the shell 2 and projects a slight distance above the upper edge of the latter. The annular space between the shells 2 and 13 is closed at the bottom by an annular plate 14. secured to the lower edges of said shells. This annular space is divided into upper and lower annular compartments 15 and 1G by a horizontal partition 17 between the shells. The tuyeres or grate members 9 communicate with the lower compartment 16.

The outer shell 13 has a horizontal annular cover plate 18. This cover plate is supported at its outer edge upon the upper edge of the shell 13 and is supported intermediate its edges by hollow castings 19 carried by the cover member 10. These hollow castings provide a series of poke openings 2O which are normally closed during the operation of the producer by ball valves 21.

Projecting downwardly through t-he central opening in the cover member 10 is a combined water reservoir and fuel feeding distributor 22, and which form a head, shown in more detail in Figures 4, 5, G and 7. The distributor carries an annular depending flange or apron 23 which dips into the water seal in the trough 12. Two segmental cover plates 24 and 25 are mounted on the distributor and have their straight edges parallel and spaced equal distances from a vcrtical plane containing the vertical axis of the distributor, thereby providing a slot 25 between said edges. The peripheral edge portions of the cover plates overhang the peripheral wall of the distributor and have an annular angle 27 secured to the under surface thereof. The vertical flange of this angle engages the upper surface of a ring gear 28 which has a vertical flange constituting a bearing for said vertical flange of the angle. This ring gear is secured to the inner edge of the cover plate 18.

Mounted on the cover plate 24 is a motor 29 which drives a worm 30. This worm engages a worm wheel 31 mounted on a horizontal shaft 32 having its bearings in a bra cket 33 projecting upwardly from the cover plate. The shaft 32 has a bevel pinion 34 on its end meshing with a bevel. pinion 35 on a vertical shaft 36, the latter having a pinion 37 on its lower end meshing with ring gear 28, and a pinion 38 on its upper end meshing with a pinion 39 on a vertical stub shaft 40 carried by the bracket 33. Pinion 39 meshes with a pinion 41 on a second stub shaft 42 carried by the bracket, and pinion 4 meshes with a gear 43 journaled on the vcrtical water pipe 44, the latter being supported in a cylindrical portion 45 of the bracket 33.

Carried by the gear 43 is a substantially circular' plate lli adapted to receive fuel from a hopper 47, into which the fuel is delivered by a conductor 48. The fuel is prevented from spilling over the peripheral edge of the plate 4G by means of a guard ring 49. This guard ring is located adjacent the peripheral edge ofthe plate and has an opening between its ends into which extends a scraper 50. Referring to Figure 9, it will be seen that the scraper and the guard ring are mounted on the upper end of a chute 51. This chute is carried by the cover plale 25 and delivers the fuel through an opening 52 in said cover plate to a distributing chute53 formed in the distributor 22. The chute 51 has a rotating poclieted fuel passing and gas sealing member 54 therein operatively connected to the shaft 32 by a flexible shaft lt will be apparent that as the distributor 22 and parts mounted thereon are rotated in one direction by the motor and gearing arrangement described, the plate 4G will be rotated in the opposite direction, whereby the fuel carried thereby will be rotated against the scraper 50 and transferred by the latter to the chute 51. This fuel will be delivered in measured quantities by the pocleted member to the distributing chute 53, which latter will distribute it uniformly to the fuel bed.

Supported by and depending from the top plates 56 of sleeves 57 is a pair of agitators 58. These agitators are hollow, approximately L-shaped members, the vertical legs of which have flanges at their upper ends bolted to the cover plates, shown more clearly in Figure 8, and the horizontal legs of which have each a series of depending hollow agitating lingers 59 which extend into the fuel bed and agitate the saine as the distributor rotates. Brackets (SO are carried by the top plates 56 and these brackets carry nuts 61 engaged by vertical lifting screws 62 which have a bearing at their lower ends in brackets 63 carried by the cover plates 24 and 25. The sleeves 57 are located in the slot 26 between the straight edges of the cover plates 24 and 25 and guided in their vertical movements by angles 64 secured to said straight edges. The agitators pass through radial openings G5 in the bottom of the distributor 22 and sleeves 66 project upwardly from the edges of these openings and telescope loosely within the sleeves 57. It will be apparent that by turning the screws 62 the agitators can be adjusted to any desired elevation, as

illustrated in Figure 2, without withdrawing the sleeves 57 from the water-seal in the distributor 22. Tl e combination of the agitator working over the radially arranged tuyeres provides particularly advantageous structure for controlling the fuel bed, the combustion zone and the ash conditions in the producer, as fully pointed out in my copending application Serial No. 1&7 ,9414, file-d Iovember 12, 1926, which constitutes a con tinuation of this application insofar as this arrangement is concerned.

Referring to Figure- s 1, 2, 3 and 8, a water supply pipe 67 is connected by a swivel 68 to the upper end of the vertical pipe di. To the lower end of this pipe is connected a short horizontal pipe 69 which has another pipe 7 O connected to its outer end and eiztending at right angles thereto. rIhe ends of the pipe 70 are connected by hose connections 71 to pipes 72 which extend into the hollow agitators. The cooling water ows through these pipe and hose connections into the agitators and after filling the same overflows through the openings 73 in the top plates 56. 'Ihese top plates are positioned below the upper edges of the sleeves 57 so that troughs 56 are formed above the plates, into which the water overflows from the agitators. 'Lach sleeve has a notch 74 (Figure 1) in its upper edge, through whichthe water from the troughs 56' overflows into the reservoir of the distributor 22. After substantially filling the distributor, the water overflows through openings 75 (Figures 5 and 7) in the peripheral wall of the distributor adjacent its upper edge. The wat-er Voverflowing through the-se openings fills the trough 12 above the cover member 10, and if not evaporated as fast as supplied thereto, spills over the upper edge of the shell 2 into the compartment 15.

Referring to Figures 2, 10 and 11, suitably supported adjacent the outer shell 13 is an exhaust fan 76 driven by a motor 77 through a belt 78. This fan is connected, through an exhaust pipe 79, with the upper compartment 15, and through a discharge pipe 80, with the lower compartment 16. rlhe fan draws the air for the blast through the openings 81 in the cover plates 24 and 25 (Figure 4). This air is drawn over the surface of the water filling the reservoir of the distributor 22 and then through the openings 7 5 and over the surface of the water in the trough 12. It absorbs the vapor rising from these bodies of water and, at the same time, retards the gradual rise in temperature of this water, whereby the cooling water does not have to be changed as often as in the usual method of operating gas producers. The air, laden with the moisture, is forced under pressure by the fan into the compartment 16 and thence to the tuyres or grate members 9.

While I have shown and described a pref erred embodiment of my invention, it will be understood that the invention is not limited tothis illustrated embodiment thereof, but may be otherwiseembodied within the scope of the'appended claims without departing from the spirit of the invention.

I claim:

1. In a gas producer of the mechanical type having a body portion and a top portion, one of which is rotatable relatively to the other, an agitator carried by the top portion with means for circulating the water throughv the agitator, an enclosed yannular water trough combined with the top and body portions and providing both a sealing and cooling medium therefor, the agitator being adapted to discharge water which has been circulated therefrom into saidenclosed annular water trough, and means for circulating air over the surface of said water and expelling it into the producer.

2. A producer of the mechanical type wherein there is a top and a body having an annular shoulder, one of which is rotatable with` respect to the other,having in combination means providing an annular water seal between the body and the top, a shell over-the annular shoulder of the body and extending down around the sides of the body of the producer, said shell being spaced from the body to provide an air circulating space, a partitiony in the shell betwecnthe top and bottom of the producer, tuyeres in communication with the space below the parti.- tion, and means for withdrawing ai-rfrom the space above thepartition and forcing it into the space below the partition, said top having an air intake opening in the top near itscenter so that air may enter the shell land circulate over water in saidA means providing a water seal.

3. A gas producerV as recited in claim 2 cliaracterized by the provision of a; water reservoir in the'top ofthe producer with an overlio-w adapted to deliver water into1 said means providing water sealn A 4;. A gas producer as recited in claim 2, provided with a water cooled agitator'in the said top and having a water reservoir in the top with an overflow adapted to deliver water to said means providing a water seal, the agitator being adapted to discharge water into the water reservoir, and the air inlet t0 the shell being over the top of the water holder.

5. In a gas producer, a body and a head, one of which is rotatable relatively to the other, an agitator carried by the head, an annular trough around the top of the body adapted to hold water to provide a water seal between the body and the head of the pro- Y ducer, means for supplying cooling Water to the agitator, means for discharging water from the agitator into said trough, an outer shell enclosing said trough and the sides of the body, said shell being spaced away from the body and trough, and a fan having an intake leading to the space formed between the shell and the body and having a dis- 5 charge passage leading into the bottom part of the producer for drawing air over thc water in the trough thence through the space between the shell and the body and discharging said air into the producer.

6. The combination with a gas producer of the type having a body portion and a fuel feeding head, one of which is rotatable relatively to the other, an annular trough around the top of the body adapted to receive Water for cooling the top of the producer and for forming a water seal between the fuel feeding head and body, of an outer shell surrounding the body and the trough, means for withdrawing air from the space between the shell and the producer and discharging it into the lower part of the producer, the space between the producer and the shell communicating to atmosphere through the fuel feeding head.

7. A gas producer comprising a body, a

head comprising a reservoir and a fuel distributor rotatably mounted on said body, agitators carried by said head, an annular Water trough around the top of said body, an outer shell embracing the walls of the body and the trough, a partition separating the space between the walls and the shell into an upper and a lower chamber, means for supplying water to said agitators, means for directing the water through the agitators, thence to the reservoir in the head from which it overflows into the annular reservoir and finally into the upper chamber between the walls of the head and the shell, means forming a water seal in the annular trough between said head and said body, said head having a restricted air opening in the top, and means for drawing air into said opening, over the water in the reservoir, the annular trough and the upper chamber and finally discharg in said air into the body of the producer.

n testimony whereof I have hereunto set my hand.

FRANCIS H. TREAT.

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