US1506227A - Suction gas producer for gasifying sawdust and like fuels - Google Patents

Description

2 Sheets-Sheet l INVENTOR Hlld ,00F/mnd r ATTORNEY Aug. 26, 1924.

H. DORMAND SUCTION GAS PRODUCER FOR'GASIFYING SAWDUST AND LIKE, FUELS Filed July 17. 1925 Aug., 26, w24., i 1,506,227

H. DORE/HAND SUGTION GAS PRODUCER FOR GASIFYING SAWDUST AND LIKE FUELS Filed July 17, 1923 2 Sheets-Shee 2 4 INVENTOR H45 ATTORNEY .eective means of retreated am. ze, i924.

intern earner carica.

HARROLD DORMAND, 0F BAYONN, NEW JERSEY.

SUCTION GAS PRQDUCER FOR GASIFYNG: SA'WDUST AND LME FUELS.

Application filed July 17, 1923. Serial No. 652,044.

To all whom t may concern:

Be it known that l, HARROLD DORMAND, a subject-of Great Britain, now residing in Bayonne, county of Hudson, and State of New Jersey, have invented certainnew andl useful improvements in Suction Gas Producers for Gasifying Sawdust and Lilie Fuels, of which the following vis a specification.

rlhis invention comprises certain improvements in suction gas producers, suitable for generating power gas by suction, and is particularly applicable to producers in which the gas is generated by sawdust or other like refuse.

The invention provides simple and edsctive means for insuring a uniform, automatic and continuous feed of such delicate fuel into the combustionv chamber. without any choking in the feed, evenly distributes the fuel into the combustion chamber, there- Aby doing away with all poking" and inter- :tering with the combustion whilst the producer is'operating, also provides simple an fully maintaining the zones of combustion, thereby enriching the quality of the gas produced, prevents heavy I distillation and allows the producer to suc# on line 2-2, Figi cessfully operate with a minimum depth of fuel bed.

The invention will be understood by rererence to the accompanying drawings, in which-- Fig. l is a sectional elevation of a gas producer embodyingv the invention, an

Fig. 2 is a sectional plan view of the saine Fig. 3 is a sectional feed gas producer embodying the invention,

and

Fig. d is a sectional plan'l view of the' same on line @-4, Fig. 3.

ln a convenient embodiment of this invention, the producer is constructed with outer steel casing l and irebrick lining 16, fire grate 3 with ash pit'chamber .7c below, all sealed from the atmosphere. One or more feed bells 4 extend into the combus- 4 tion chamber. the reason for plural feeds,

being, if used, to increase the suction area without materially increasing the height of the producer. rli`he feed bell or bells 4 are so designed as to cause the fuel preferably sawdust to be evenly distributed over the suction area, by means of a plurality ot fuel in the combustion the chamber. elevation of a doublefeed apertures 4e", at, or near, the lower extremity .of each feed, of rectangular or other suitable shape, and lof sizes to meet existing requirements. rll`hel height of the ,l chamber is therefore regulated by the height of the apertures in the feed bell or bells. l have indicated the normal surface of the fuel by the dotted lines a, and it is this surface which ll-term suction area, having reference to the suction of the engine or pump withdrawing the gas through the outlets 7. The feed `'bells may be slightly conical in shape towards the lower part, 'or in other Awords dared, to allow for the swelling of moist 4fuel, but not suliiciently so @te interfere with the efficient working of the apertures.

The storage hopper 5 being always maintained full, the gravitation of this column or fuel causes the saine to be forced through the apertures on to the suction area, feeding the centre of combustion at the same time, and to prevent'too heavy a dowd ing of uel, yafter the apertures have done their work, a vacuum chamber 6 is positioned at the lower part of the storage hopper, which .stays the movement, momentarily, at that point, and stops unnecessary fuel being dumped into the chamber.

lt will be noted that located adjacent the combustion chamber av suitable distance above the grate 3 is an annular vaporizer chamber 8, exposed to the maximum heat of the combustion zone. rl`his vaporizer chamber is connected with an inlet 9 and a tan 10 is provided tor forcing air into rli`lie chamber 8 also is connected with water eed pipes ll so that water may be delivered in suitable quantities.' The vapor produced within the chamber 8 is drawn into the combustion zone, where the chemical actionl ot gas making is goinP on, via vapor conduits i2 which lead irom the chamber to points in the ash it. 'lhus means are provided whereby t e zones of combustion can be maintained, and too high a temperature reduced at will, (hirh temperatures being detrimental to the eilicient working of the producer) by the introduction of water vapor, mixed with the air necessary for the gasmaking, and which is 'sucked into the burning mass.

An overflow pipe the va.-

whilst being used, for the zones of combustion to porizer, not being vaporized, therefore not necessary, on account of reduced temperature.

The admission of water vapor into the combustion zone is only necessary, when there is not sufiicient moisture 1n the fuel will help to scrub out the all poking or interfering with the combus tion Whilst operating in the following man- Y ner:

IVhenthe suction stroke causes a suction in Athe upper part of the combustion chamber, this suction area is immediately filled with gas, and at the Sametime the whole body of fuel'in combustion, being so light in weight, is lifted, and immediately after falls again. After each fall the apertures replenish the suction area with fresh fuel, the action of the vacuum chamber of the feed hopper arresting too heavy a fall of fuel, and this continues in automatic motion with each suction stroke.

It will be noted that an insulating chamber 14 surrounds the entire combustion chamber and extends to the horizontal upper wall 15 which supports the feed bell or bells 4. 'A vitreous lining 16 is disposed intermediate the insulating chamber and the combustion chamber and is outwardly fiaring above the vaporizer chamber to restrict the combustion chamber at and belo-w the normal surface line of greatest combustion which I-have indicated by the dotted line I). yThe vitreous lining 16 coacts with the vaporizer chamber to restrict the combustion chamber below the flaring section of the latter.

What I claim is:

A suction gas producer for gasifying sawdust and like fuels comprising a cas-- ino', a fire gra-te separating combustion and as pit chambers, a feed pipe projecting into the combustion vchamber and formed with lateral apertures, for the vpassage of the fuel, a horizontal wall closing the top ofthe combustion chamber and affording a support for the feed pipe, an insulating lining surrounding the combustion chamber and extending upwardly to` said horizontal wall, an annular vaporizer surrounding the combustion chamber, means for admitting air and moist-ure to said vaporizer and for leading vapor therefrom to the combustion chamber, anda vitreous lining intermediate the' insulating lining and the combustion chamber and outwardly flaring to enlarge the combustion chamber above said vaporizer and coacting with the vaporizer to restrict the combustion chamber below the A Haring section. Y

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

HARROLD DORMAND.

Witnesses:

. W. LEE HELMS, p F. H. LOGAN.

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