US743769A - Heater. - Google Patents

Description

PATENTED Nov. 10, 1903; H. c. TABRETT & W. LEWIN.

HEATER.

APPLIGATION FILED APR. 8. 1903.

Q SEBBTSSHEET 2.

NO' MODEL.

IV] TNESSES w: mains awns cc. wuTu-uwn vn a-mm'rm u c UNITED STATES Patented November 10, 1903.

PATENT OFFICEe HENRY C. TABRETT AND WALTER LEWIN, OF SAN FRANCISCO, CALIFORNIA.

HEATER.

SPECIFICATION forming part of Letters Patent No. 743,769, dated November 10, 1903.

Application filed April 8, 1903. Eerial No. 151,670. (No d l.).)

To all whom it may concern:

Be it known that we, HENRY C. TABRETT, residing at 3847 Twenty-first street, and WAL- TER. LEWIN, residing at1227 Page street, in

the city of San Francisco, county of San Francisco, and State of California, have invented certain newandusefnl Improvementsin Evaporators or Heaters; and we do hereby declare the following to he 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. 4

This invention relates to improvements in evaporators or heaters for utilizing the waste heat in smoke-stacks, breechings, uptakes, or the like; and it consists of the novel construction and arrangement of the parts.

The objects sought to be accomplished are to evaporate salt sea-water or foul water, whereby fresh pure water may be obtained, or to provide an economical means for heating any liquid or fluid, such as steam, air, or other gases.

Broadly,'the invention consists of an initial or precipitation drum connected'by tubes (exposed to the waste heat) with a larger drum or reservoir provided with a separator and water-gage, pop-valve, draw-off valves,

and precipitation-legs suitably combined therewith.

In the drawings, Figure 1 is a front elevation of a heater constructed in accordance with this invention disposed in the uptake of a battery of boilers, which are indicated in dotted outline, the invention being broken away in parts to better disclose its construction. Fig. 2 is a side elevation of the same.

In detail the construction consists of the receiving-drum A, in to which the salt sea-water, for instance, is pumped through the inletvalve A. The receiving-drum is-connected by the heat absorbing tubes B, disposed across the uptake and terminating in the shell of the seconddrum O, the ends of the tubes beingexpanded and beaded over at each end, where they join the respective drums. The quantity of water in the heater is indicated by the gageglass D, set on the side of the drum 0, and provided with the tube D, leading back to the drum A, to balance the pressure in the glass D. The separator consists of the outer shell E, set in the annular pillar E, riveted to the upper dome'of the drum 0. The shell E is capped by the top E", to which the flanged T E? is attached to lead the dry vapor to a suitable condenser. (Not shown.) The separator is provided with the reliefvalve E to blow otfi excess pressure. The vapors arising from the surface of the water in the drum C escape through the perforations w of pipe E upward into the separator and are released under the cap E having the downwardly-extending wall E', which forms the annular spaces E E through which the vapor must circulate before escaping from the separator. The condensation or a gulp of water within the separator drains back into the drum A through the pipe E The drums and tubes are accessible for replacement, cleaning, 850., through the door A in the drum A and through the manhole G in the drum 0. In the process of evaporation the specific gravity of the-water in the drum A becomes greater, and it sinks into the precipitation leg A from whence it is led to the bilge or sea.

The drum A can be of cast-iron and is preferably set lower than the drum 0 to give a free rise to the hot water. It is obvious, however, that the construction could be variously disposed without departing from the spirit of this invention.

In operation the drum-A is pumped full until the water rises to a point above the level of the exits of tubes B, as indicated in the gage-glass. Under the influence of the heat absorbed by the tubes the water evaporates, precipitating the heavier impurities into the drum A, the purified vapors rising into the separator and escaping dry to the condenser. After a few hours running, during which the drum 0 has been relieved of the first filling of salt water through the petcock G the drum O'should not prime, which confines all deposits to the drum A, from which they are readily removable. A mean water-level is preserved in the heater by an automatic feed to the drum A and an automatic blow-0E on the leg A at A.

Having thus described this invention, what is clai1ned,and desired to be secured by Letters- Patent, is

. 1. The combination with the smoke-passage of a boiler of a heater consisting of a receiving-drum having an inlet above and an outlet below the center thereof, and a precipitation-leg connected to the bottom thereof; and tubes leading from the receiving-drum across the smoke-passage to a second drum communicating with a separator, consisting of a series of vertical annular passages, with intercommunication between alternating top and bottom; a suitable outlet-drain and safetyvalve on said separator; and a water-gage communicating with both drums; and a door in said receiving-drum in line with the conmeeting-tubes.

2. The combination with the smoke-passage of a boiler, of a heater-consisting of a receiving-drum having suitable inlets and outlets and tubes leading from the receiving-drum across the smoke-passage to a second drum; a separator connected to said second drum, and consisting of a series of vertical annular passages intercommunicating alternately top and bottom; and a suitable outlet from said separator, and a water-gage communicating with both drums.

3. A heater such as described, consisting of a plurality of drums connected by heat-absorbing tubes; and having a suitable vaporseparator; a safety-valve; water-gage communicating with both drums, and precipitation-leg, suitably combined therewith.

4. A heater such as described, comprising a plurality of drums connected by heat-absorbing tubes, a suitable vapor-separator, a perforated pipe communicating with said separator and extending into one of said drums, a safety-valve, a water-gage communicating with both of said drums, and a precipitationleg leading from one of said drums.

In testimony whereof we have hereunto set our hands this 26th day of March, 1903.

HENRY C. TABRETT. WALTER LEWIN.

Witnesses:

BALDWIN VALE, A. J. HENRY.

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