US796975A - Water-tube boiler. - Google Patents

Description

PATENTED AUG. 8, 1905.

J. KENNEDY. WATER TUBE BOILER.

APPLICATION FILED AUG. 22, 1904.

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INVENTOR WITH ESSES c u m. 1 s m n s w w M w R a o n n w o n p 0 c m m c a w a a u N A PATENTED AUG. 8 1905.

J. KENNEDY.

WATER TUBE BOILER.

APPLICATION FILED AUG. 22, 1904.

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PATENTED AUG. 8, 1905.

J. KENNEDY. WATER TUBB BOILER.

APPLICATION FILED AUG. 22, 1904.

4 SHEETS-SHEET 3.

I I v I I I I I I I I I I 1 I I I I I INVENTOR MVII-IITN 55555 W No. 796,975. PATENTED AUG. 8, 1905.

- J. KENNEDY.

WATER TUBE BOILER.

APPLICATION FILED AUG 22 1904 o a z 21.. 5 1 7 5 o m y 4 MQE g E ll 6 NM 2 0 1 MAW i run: 0 4 :L: a 4 I Q? ":(VENTOR 5% WW 4 SHEETS-SHEET 4.

WITNESSES JULIAN KENNEDY, OF PITTSBURG, PENNSYLVANIA.

WATER-TUBE BOILER.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed August 22, 19Q4. Serial No. 221,596.

To aZ whom, it may concern:

Be it known that I, JULIAN KENNEDY, of Pittsburg, Allegheny county, Pennsylvania, have invented a new and useful Water-Tube Boiler, of which the following is a full, clear, and exact description, reference being bad to the accompanying drawings, forming part of this specification, in which Figure 1 is a sectional side elevation of my improved boiler. Fig. 2 is a transverse vertical section of the same. Fig. 3 is a front elevation, partly broken away. Fig. 4shows a modified construction, and Fig. 5 is a horizontal section on the line V V of Fig. 4.

My invention relates to the class of downdraft-boilers where the gases flow downwardly among water-tubes and then rise to the stack.

The object of the invention is to provide a boiler of this type which shall be simple, cheap of construction, economical, and easy of access.

In Figs. 1 to 3 of the drawings, 2 and 3 represent parallel longitudinal steam and water drums, and 4 and 5 represent parallel longitudinal mud-drums, these drums being connected by banks of tubes 6.

Each unit comprising the upper and lower drums connected by the bank of tubes is supported from the upper drum, the ends of which rest on the rear wall 6 of the setting or brickwork surrounding and supporting the boiler and the roof 7 of the flue 8, leading from the combustion-chamber 9. The upper drums are also supported upon side brackets, (shown at 10.) The upper opening 11, which leads from the combustion-chamber into the space around the upper part of the tubes is preferably of sufiicient width to cover two units, which are inclosed between the side walls 12 12. The lower drums are preferably not connected for water circulation, but "may be stayed by the bolts 13 between them. Each bank of water-tubes therefore has its own independent water circulation. The muddrums are preferably arranged in an enlarged chamber 14, which extends forwardly below the combustion-chamber, the latter being substantially at the ground-level, (indicated at the line a w.) Access is had to the chamber 14 through the stack 15 through a door 16, which leads to steps or ladder-rings 17. The attendant may thus have access to the lower drums for entering the manholes (indicated at 18) or for inspection. The gases enter the stack through the arched port 19. It will be noted that the front and rear walls 20 and 6 are close I preferably within the setting,so that they form part of the evaporating-surface. These drums are preferably connected by tubes 21 to an upper transverse steam-drum 22, which is external to the setting and from which the steam is taken through outlet 23. The steam and water drums preferably have their waterspaces connected by the front U-shaped pipe 24. The mud-drums are provided with suitable blow-off pipes 25, which lead to external valves 26. In building a battery of the boilers each boiler set of two units is preferably cut off from the next boiler by the common side wall between them, while the front wall 27 over the combustion-chamber is preferably continuous along the front of the battery.

In the operation of the boiler water is fed in through pipe 28 and circulates in the bank of tubes, the gases flowing downwardly through the bank in an opposite direction to the rising currents of heated water in the tubes.

The advantages of my invention result from a simple, convenient, and cheap construction.

N o riveted joints are exposed to the flame and gases. The steam-drying drum is external. The boiler is su pported by the upper drums and is free to expand without injury, the lower drums hanging upon tubes. Large storagespace is supplied for the heated water. The mud-drums are protected fromhigh temperature. No baffle-walls are required, and circulation is strong and certain,being upward in the hotter tubes and downward in the cooler tubes of each bank. No cleaning-doors or thin partitions are employed, and the brickwork is solid and not provided with openings which are liable to start cracks in the setting. The tubes are substantially straight and vertical and all parts subject to pressure are cylindrical or spherical in form.

In the modification shown in Fig. 4 the upper drums 2 3 and the lower drums 4 5 are arranged transversely of the boiler-setting, so that the products of combustion instead of passing through the bank of tubes in the direction of their length pass downwardly and across the bank of tubes.

Variations may be made in the form and arrangement of the parts without departing from my invention, since I claim- 1. A downdraft-boiler having a plurality of units, each consisting of a steam and water drum connected by a bank of tubes to a parallel mud-drum, said units being arranged side by side within the setting, a combustionchamber having an opening into the banks of tubes across their front upper portions, and an outlet for the gases below the mud-drums; substantially as described.

2. A downdraft-boiler having a plurality of units, each consisting of a steam and water drum connected by a bank of tubes to a parallel mud-drum, said units being arranged side by side within the setting, a combustionchamber having an opening into the banks of tubes across their front upper portions, and a rear outlet for the gases below the mud-drums on the side opposite to the inlet for gases; substantially as described.

3. A downdraft-boiler having a plurality of units, each consisting of a steam and water drum connected by a bank of tubes to a parallel mud-drum, said units being arranged side by side within a downdraft chamber common to all, a combustion-chamber having an opening into the banks of tubes across their front upper portions, and a rear outlet for the gases below the mud-drums on the side opposite to the inlet for gases; substantially as described.

4. A downdraft-boiler having a series of units, each consisting of a longitudinal cylindrical steam and water drum connected by a bank of tubes to a parallel cylindrical muddrum, said units being arranged side by side within the setting, a combustion-chamber having an opening into the banks of tubes across their front upper portions, and a rear outlet for the gases below the mud-drums on the side opposite to the inlet for gases; substantially as described.

5. A water-tube boiler consisting of a series of units each composed of parallel longitudinal cylindrical upper and lower drums con nected by a bank of tubes, said units being arranged side by side, and each unit being suspended from the upper drum, a combustionchamber having an upper opening leading into the front upper part of the banks of tubes, an enlarged chamber surrounding the lower part of the banks and the mud-drums, and an outlet-flue leading from the rear of said lower chamber to the stack; substantially as described.

6. A water-tube boiler having upper and lower cylindrical drums connected by banks of tubes, said drums extending longitudinally of the setting, a combustion-chamber substantially at the ground-level and having an upwardly-extending fine leading into the front upper parts of the banks, a lower chamber surrounding the banks and extending under the combustion-chamber, and an outlet-flue at the rear of the lower chamber; substantially as described.

7 Adowndraft-boiler consisting of a series of units, each unit having all parts within the setting of cylindrical or spherical form, and consisting of an upper and a lower longitudinal drum connected by a bank of vertical tubes, the weight of the unit being hung from the upper drum, a combustion-chamber having an opening into the upper part of the bank of tubes, and an enlarged chamber surrounding the lower drums and having a rear outletflue and a door giving access to the flue and lower chamber; substantially as described.

8. A downdraft-boiler having two cylindrical longitudinal steam and water drums, each connected by a bank of vertical tubes to a separate cylindrical mud-drum, an external steam-drum connected to the upper drum, an external water connection between said drums, a furnace having an opening into the banks of tubes across their upper front portions and a lower offtake-flue for the gases; substantially as described.

In testimony whereof I have hereunto set my hand.

JULIAN KENNEDY WVitnesses:

GEO. B. BLEMING, JOHN MILLER.

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