US758224A - Oil-burning system. - Google Patents

Description

PATENTED APR; 26, 1,9 04.

t. W. TUCKER & 0'. L. GRUNDBLL. OIL BURNING SYSTEM.

APPLICATION FILED JUNE 26, 1902. RENEWED SEPT. 19, 1903.

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OIL BURNING. SYSTEM.

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v UNITED. STATES Patented April 26, 1904.

PATENT OFFICE.

FJDVVIN W. TUCKER AND CHARLES L. GRUNDELL, OF SAN FRANCISCO,

/ CALIFORNIA.

OIL-BURNING SYSTEM.

SPECIFICATION formingpart of Letters :Patent No. 758,224, dated, April 26, 1904. I l

I Application filed June 26, 1902. Renewed-September 19, 1903. Serial No. 173,782. (No model.)

To all whom it may concern: Be it known that we, EDWIN W. TnoKnR and CHARLES L. GRUNDELL, citizens of the United States, residing at and whose post-office addresses are, respectively, 818 Page street and'1638 Hyde street, invthe city and in the county of San Francisco and State of California, have invented certain new and useful Improvements in Oil-Bu rning Systems; and we do hereby declare the following to be a full, clear, and exact description of said invention, such as will enable others skilled in the art to which it most nearly appertains to make, use, and practice the, same.

This invention relates to improvements in apparatus for burning fuel-oils, and relates particularly to the adaptation of such apparatus to steam-generating plants.

The invention consists, primarily, of the combinatlon, wlth a steam-generating holler, of an air-compressor and receiving-tank with 'means for maintaining a normal pressure therein, an oil and air heater with its contents under the pressure of the air-compressor and fed by an oil-pump, automatically maintaining a normal level in the said heater, strainers interposed in the pipe-line from the main,

storage-tank to, the heater, means for heating the oil in the heater, suitable piping from the heater to the furnaces of the boiler, special furnace-fronts consisting of a box-like structure normally flush with the face of the boilerfront and having interior chambers extending into and subjected to the heat of the furnace, cone-shaped openings through said fronts flaring inwardly to form flame-inlets for the burners and internally insulated from the extreme-heatthereof, the whole special furnace-front being either hinged or bolted to the front of the boiler, so'as to be readily swung free therefrom to facilitate access to theburners and to the furnaces, the air and oil supply to the burners fixed to the furnace-v front being swivel-jointed on the same axis and adapted to swing with the said front, the said air-supply being led through and superheated in the internal chambers of the said furnace-front before entering the burners, suitable valves, gages, and secondary mechanisms in connection with above main vertical cross-section through'the furnace and boiler, taken on the line .2 2-, Fig. 1. Fig. 3 is a front elevation of the special furnace- .front, showing form and mode of connecting air and fuel pipes to burners. Fig. 4: is a vertical cross-section of the special furnace-front on the line 2 .2, Fig. 2, lookingoutward, showing the outlines of the internal chambers therein. Fig. 5 is a detail view of the alarm mechanism. Fig. 6 is a detail view of the hingevalve B. r

In the drawings similar letters of reference refer to similar parts throughout the several views.

The invention will be described with particular reference to its application to marine conditions, wherein economy of water necessitates the use of air instead of steam as avehicle for atomizing the oil. The extra drain on the boilers in the use of steam as avehicle, as well as many advantages incident to the use of compressed air, commends the latter in a variety of instances.

The-steam generated inthe boiler A passes into the pipe A for distribution. led into the actuating-cylinder B of the aircompressor' through-the pipe B, which oper ates to compress the air in the cylinder B from which it passes to the receiving-tank'B The pressure of air is regulated by the auto matic pressure-governor B on the pipe B, set to the desired pressure and balanced by the opposing pressures of the steam and air through the pipe B and the compensatingspring of the governor. The pop-valve-B acts as a safety against excess of pressure. From the tank B the air passes through the pipe B to the distributing-pipe B and also through the check-valve B to the oil-heater O.

The oil-heater C is supplied from the main Steam is A oil-storage reservoir or settling-tank by. the duplex pump D through the pipe D and spring check-valve D. The pump'is actuated by steam from the pipe A The oil is pumped through the strainers D,arranged between the valves D on the oil-conduit D The strainers are arranged in two separate sets between valves, so that the oil may be diverted while one set is inoperative without interrupting its flow to the heater. The steam-pipe A enters the heater C and is coiled within the body thereof to heat the air and oil therein, passing thence to the condenser or hot well of the steam-plant to save the condensation resulting from radiation. The automatic action of the pump Dis controlled by the throttle D operated by the float D within the heater C. The lever D and its trunnion-pivot are hollow and open to the float D This permits seepage into the float to be drawn off through the pet-cock D screwed onto the end of the trunnion. For facility of access the lever D of the float is pivoted in the manhole-plate D covering the opening in the tank. By this arrangement the whole valve mechanism is readily accessible. The plate D has the graduated quadrant D affixed thereto to act in conjunction with'the exposed end of the lever D as an index to Show the oil-level in the tank (I. The ball:

float D is adapted to float upon the surface of the oil. To avoid collapsing of the ball by the air-pressure, a small hole is drilled in the top of'the ball to. admit the air. When the ball drops below the mean level, it opens the throttle Di admitting steam to the actuating-cyh inder of the pump D, which raises the level of the oil. Should the oil-level fall and the pump fail to operate, steam (through a by-pass in the throttle) would be admitted to the alarmwhistle D which would call attention to the failure of the pump. This effect would also be produced by an abnormal rise of the oillevel. The compressed air entering the heater C exerts a pressure on the oil therein, causing it to flow through the distributing-pipe D to the burners E. Any gases arising from the heated oil may be evacuated through the valve D thence forward through the distributingpipe B to the'burners E, absolutely removing all chances of explosion.

The type of burner shown formsthe subject of a separate application for patent, and consists of a fitting having an internal dividing-wall, an air-pipe forming the shell of the burner screwed into the fitting and terminating in a tip, an oil-tube centrally located in said shell and screwed into the dividing-wall of said fitting from behind in such a manner as to be readily withdrawn and replaced, a mixing-head screwed onto the end of the oiltube near the burner-tip and adapted to entirely fill the bore of the burner-shell and having an extension into the bore of the tip, spiral grooves cut into the periphery of the mixinghead to give the escaping air a cyclonic whirl as it picks up the globules of oil squirting from the holes in the mixing-head and spattering against the adjacent walls of the tip, means for controlling and regulating valves located on the respective supply-pipes adjacent the burner, and stop-valves adjacent the regulating-valves operated simultaneously by a throttle-lever.

From the distributing-pipe D the oil passes through the valves E E to the oil-conduits of the burners. The swivel-joint E located on the axis of the hinge F of the furnace-front F, permits the latter to swing upon its axis without oil-leakage. The joint also acts as a valve to shut off the oil-flow when the furnace-front is swung outward. From the distributing-pipe B the air is led through the swivel-joint 13 (similar in every respect of operation to E to the inlet F of the internal circulation-chambers F of the furnace-front F, aroundand through which it passes, absorbing the radiatedheat from the furnace before passing through the outlets F to the burners. From the outlets F the air passes through the valve E E to the air-conduit of the burners, combining with the oil and es caping in combustion in the furnaces. The valves E and E act as regulating-valves to control the proportions of oil and steam admitted to the burner. The valves E and E operated by the throttle E control the volume of combustion independent of the proportions thereof.

The special furnace-fronts F combine four radical improvements inthis artto wit, superheating the air or steam used in combustion, keeping the furnace-fronts cool by using the radiated heat formerly lost in fire-brick of fuel. 1

Under ordinary conditions the furnace-front may be cast in one integral piece, the internal chambers being suitably cored. It may be of any desired shape Or contour, as conditions may demand, and is hung upon the hinges F, set out from the face thereof, to allow a free swing and room for the swivel in the pipe connections. It is held snugly to the face of the boiler-front X by the bolts F compressing the non-combustible gask t F between, The flared burner-openings F ,'subjected to the extreme heat of the burners, are therefore lined with the graphite lining F held in place by the removable ring F. The bushing F through which the burner extends, is slightly larger than the burner to give a draft of air around same. The opening F covered by the swing-plate F gives a peep-hole view of the interior of the furnace. Should the air-supply for any reason fail, steam may be instantly substituted by burners can be graduated to any degree by opening the valve 13, leading from the dis- Io tributing-pipe, mixing the airdirect from the compressor with the superheated air issuing Should it be deg sired to cut out the superheating-chambers in from the furnace-fronts.

the furnace-front, close the valves 13 E and :5 open B 1 This gives a direct flow from distributing-pipe to burners. To blow out the oil-distributing pipe D and burners E with steam or air, close valve '1) and open B. This is advisable when shutting down the 2 plant to prevent any oil from remaining in pipes or from running into the furnaces when the boiler is not under steam. Air is admitted through the damper-door X in the usual manner, except that the bridge-wall G, which has an upwardly-curved face, gives it an upward trend into the path of the flame to prevent any cold air from passing into the furnace, which would otherwise form a strata of cold air between the combustion and the bottom of the furnace. sets, so that under a slow bell alternate burners may be shut down and the remainder regulated. In this manner the heat is more evenly distributed than it could be where all the burden was placed upon a single burner. This arrangement of the burners in sets amounts to more than a double use, inasmuch as a new result is accomplished. By this arrangement it is possible to cut down combustion to one-half and keep all ignited burners operating at full capacity, insuring perfect combustion and an equal distribution of heat under the boilers. This is a very important item in stormy or foggy Weather, when it may 4 5 be necessary to run for days under half-speed. N0 burner can be expected to accomplish as perfect combustion under half capacity as under full blast. Further, only the forward portion of the boiler is operated upon by the 5 flame, resulting in an irregular generation of steam It is obvious that this system may be adapted to other circumstances than those specifically above described and that changes may be made in the location of certain valves, 620.,

without departing from the spirit of this invention.

' Therefore what we claim, and desire to secure by Letters Patent, is

1. In an oil-burn ing system the combination with a steam-generator of an air-compressor, a receiving-tank therefor, and means for automatically maintaining a given pressure in said tank; a heater heated by steam from said gener- The burners are arranged in ator, and adapted to contain fuel-oil under the 5 pressure of air from the air-compressor, means for pumping oil from the source of supply through strainers arranged in parallel, whereby the flow may be diverted without stoppage, and means whereby a given oil-level is automat- 7 ically maintained in the heater; distributingpipes leading from the heater below the oillevel and from the air-compressor to the burners under the steam-generator; and distributing-pipes leading from the heater above the oil-level to special furnace-fronts, containing internal superheatingchambers exposed to the radiated heat from the furnaces, from which the air is led to the burners: substantially as described. 30

2. In an oil-burning system the combination with a steam-generator, of an air-compressor,

areceiving-tank therefor, and means for maintaining a given pressure in said tank; a heater heated by steam from the said steam-genera- 5 tor, and adapted to contain fuel-oil under the pressure of the air from the air-compressor; a pump adapted to over balance a loaded checkvalve to supply the said heater from the source of the oil-supply; means for maintaining a given oil-level in the said heater, con sisting of a float pivoted in the manhole-plate resting upon the oil, and suitably connected with the throttle controlling the action of said pump and an alarm mechanism, whereby the failure of said pump to perform its func tion will divert the steam to the alarm; distributing-pipes leading from the heater below the oil-level to the burners under the steamgenerator; and distributingpipes leading from the said heater above the oil-level to the said burners; means for letting steam into the air-supply pipe; and means for letting steam or air into the oil-distributing pipes between the heater and the burners; substantially as described.

3. In an oil-burningsystem the combination of a steam-generator; an air-compressor; and an air and oil heater; with a furnace-front con sisting vof a front hinged to the boiler-front, and having internal chambers subjected to the radiated heat of the furnace, openings therethrough, having oil-burners fixed therein; oil

and air supply pipes swiveled on the axis of the'hinge of said furnace-front, the oil passing direct to the burner and the air passing into and through the internal chambers of said furnace-front before entering the burner; substantially as described.

4. In an oil-burning system, the combination with a steam-generator, an oil-supply apparatus, an air-supply apparatus,of afurnace-front having internal chambers exposed to the action of the heat, said front being hinged, an airpipe from the air-supply apparatus to said chambers and to the burners direct, an oil-'pipe from the oil-supply apparatus which connects with the burners, said chambers connecting with the burners to supply air, and hingevalves on said air and oil pipes whereby the supply of air and oil can be cut oil.

5. In an oil-burning system, the combination with a furn ace-front, burner-openings thereon, air-spaces in the furnace-front around said burner-openings, said spaces connected with the burners, of means whereby air under pressure is supplied to said burners through said spaces, means for supplying oil to said burners, means whereby said air is supplied directly to the burners, omitting the airspaces and means whereby steam is supplied to the air-pipe.

6. In combination with an oil-burning system, a furnace-front hinged to the boiler-front and having a plurality of burners projecting therethrough, internal chambers in the furnace-front being exposed to the heat of the furnace and through which air passes to the burners, of means for supplying oil to the burners, means for supplying air to the chambers, and valved hinges on said supply means whereby the supply of oil and air can be cut otf.

7. In combination with an oil-burning system, a heater, adapted to contain fuel-oil and having a manhole-plate near the oil-level; a float trunnioned in said manhole-plate,and having a hollow stem and trunnioned whereby the seepage into the float may be drawn ofi': substantially as described.

In testimony whereof we have hereunto set our hands this 16th day of June, 1902.

EDWIN W. TUCKER. CHARLES L. GRUNDELL. Witnesses:

G. F. HATToN, BALDWIN VALE.

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