USRE12367E - Gas-producer - Google Patents

Description

REISSUED JULY 4, 1905.

A. B. DUFF. GAS PRDUGER.

APPLIOATION FILED Mu 15, 1905.

UNITED?. STATES Reissued July 4, 1905.

PATENT OFFICE.

GAS-PRODUCER.

SPECIFICATION forming part of Ressued Letters Patent No. 12,367, dated July 4, 1905.

Original No. 786,200, dated March 28, 1905. Application for reissue filed May 15. 1905. Serial No. 260,603.

To all whom, if; may concern:

Be it known that I, ALFRED BARKEE DUEE,

a subject of the King of Great Britain and Ireland, residing in the city of Pittsburg, in the county of Allegheny, State of Pennsylvania, have invented certain new and useful Improvements in Gas-Producers, of which the following is a specification.

Myinvention has for its object to improve the construction of gas-producers and increase their efiiciency by providing for the more regular and efcient distribution of air or of air and steam to the fuel being gasiiiedin the producer.

In gas-producers as hitherto generally constructedthe air (or air and steam) has either been distributed by means of gra-tings placed more or less vertically in a bottom casing or by means of a louvered cone or hood delivering the air either downwardly or more or less horizontally; but both these known forms of blowing arrangements are defectiveA when either is used alone in producers where the production of ammonia is desired, as in such producers a large amount of steam is used, and while the fuel must first get only sufcient air to enable it to be well ignited, yet the blast must not be delivered too much at one point or be too concentrated even if delivered at more than one point, as this would cause too high a temperature at such point or points and lead to the destruction of the ammonia produced.

According to my present invention I combine these two methods of introducing the air or air and steam to the producer, superimposing the louvered cone on a casing having more or less vertical gratings. IVith this improved combined construction greater rapidity of action is secured, while the fuel is more perfectly reduced to ashes, as while the combined blowers work simultaneously the streams of air or air and steam from the two blowers at the same time act consecutively upon the fuel as the latter moves downward, the upper conical blower delivering air to light up the `fuel to incandescence, while the lower grating causes the air to act upon the fuel with a finer distribution, completely reducing the remaining partly-gasified fuel to ashes, and both these actions taking place without raising the temperature at any one point high enough to destroy the ammonia produced.

In order that my invention and the manner of performing the same may be properly understood, I hereunto append a sheet of eX- planatory drawings, to be hereinafter referred to in describing the improvements.

In the drawings, Figure A1 is a sectional plan,Y and Fig. 2 a sectional elevation, of part of a gas-producer having my improvements applied thereto.

As shown in the drawings, the shell A of the producer, lined with fire-bricks, is circular in plan, the lower edges of the shell dipping, as usual, into the water in an ash-trough B, the water forming a gas-tight seal and the ashes or residues descending into the water seal being removed by means of rakes, as usual. f

In the center of the trough B there is built acasing C, upon which is superposed a ring of vertical gratings D, which, however, may be more or less inclined and which is preferably made up of sections bolted together, as shown in plan, Fig. 1. On the top of this ring of gratings D there is placed a conical louver-ring F, and on the top of the ring F a cover Gr is secured by bolts and distance-pieces H at intervals, so that an air-space J is left between the ring F and cover Gr, and the whole forms a louvered cone or hood having a closed top. Instead of there being only one louver-ring F there may be a number, these rings being secured in position by bolts and distance-pieces, so as to leave the air-spaces J between each and being in all cases surmounted by a cover G.

The air or air and steam for combustion or gasification of the fuel is supplied to the casing C through a duct K, communicating outside the producer-shell A with a blower-pipe L. The air (or air and steam) passes from the casing C into the producer both through the gratings D and the air-space (or spaces) .I and acts on the fuel in the improved manner hereinbefore described. The duct K is provided with a door M, through which a rake can be inserted to clean out any residues which may become deposited in the casing C. The duct K forms one of the supports for the producer- IOO shell A, other supports N of the usual form being a-lso provided'.

` It is to be'understood that the other parts (notshown)of thegas-produoer are Constructed and arranged in any suitable known manner and also that the producer-shell instead of being circular in plan may be squareor of other desired shape. In this ease the improved combined blower described will be shaped to suit the internal space in the producer-that is, it may be arranged to only oooupy the center of the producer, or it may be arranged to extend from one side of the producer-easing to the other side in the form of acasing, oarryiug a more or less vertical grating, with the cone part taking the form of an angular louvered hoodv or cover.

What I claiml as my invention is- In combination, a gas-producer, a watersealed ash-trough therefor, an air-receiving casing in the ash-trough, substantially vertioalgratings carried on the casing and distrib- `uted over a large area, a free spaee for the fall of ashes between the air-easing and producer-walls, a louvered' oouesuperimposed on the gratings, said cone consisting of a louvered ring above the casing, and a cover superimposed thereon so as to leave air-space in the wall of the cone, said air-spaces in the oone and grating being so proportioned that a sufoient quantity of air is made to act on the upper part of the fuel and light that part up to incandescence, While the lower grating causes the air to act upon such ignited fuel as it descends with a iner distribution and without raising the temperature at any point too high.

In testimony whereofIhave signed my name to this specification in the presence of two subsoribing witnesses.

ALFREDV BAKKER DUFF Witnesses:

JoHN ANDERSON BARKER, ROBERT HENRY HILL.

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