US407940A - Steam-generator - Google Patents

Description

(No Model.) 3 Sheets-Sheet 1 T. F. MORRIN.

STEAM GENERATOR.

No 407,940. Patented July 30, 1889.

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No. 407,940. Patented July 30, 1889.

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(No Model.) 7 a Sheets-Sheet 3 T. P. MORRIN.

STEAM GENERATOR.

No. 407,940.. Patented July 30, 1889.

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UNITED STATES PATENT QFFICE.

THOMAS F. MORRIN, OF JERSEY CITY, NE\V JERSEY.

STEAM-G EN ERATOR.

SPECIFICATION forming part of Letters Patent No. 407,940, dated July 30, 1889.

Serial No. 281,677. (No model.)

To all whom it may concern.-

Be it. known that I, THOMAS F. MoRRIN, a citizen of the United States, residing in Jersey City, Hudson county, New J ersey, have invented certain Improvements in Steam-Generators, of which the following is a specification.

My invention relates to steam-gen erators of the class illustrated and described in the patent granted to Morrin and Scott December 23, 188$, No. 309,727; and the object of my present invention is to improve the construction and operation of a generator of that general character.

My invention will be fully described here inafter, and its novel features carefully defined in the claims.

In the drawings, which serve to illustrate myinvention, Figure 1 is a sectional elevation designed to illustrate the invention. The left half shows the casing of the generator in elevation, except at the upper part, where a portion of it is broken away. The right half shows the casing and interior generating elements in vertical mid-section up to the waterlevel. Above the water-level these elements are in elevation. WVhere the casingis broken away at the left side the generating-cylinder at the water-level is shown in elevation and divested of the generating-tubes, and above this portion the left half of the generatingcylinder above the water-level is shown in vertical mid-section. Fig. 1v is a fragmentary sectional view of the generating-cylinders, taken in the plane indicated by dotted line 1 in Fig. 1. Fig. 2 is a vertical mid-section of a part of the generating cylinder and tubes below the water-level on a scale about four times that of Fig. 1. Fig. 3 is a similar sec tional view on a scale about one-half that of Fig. 2 of that portion of the generating cylinder and tubes above the water-level. Fig. 4 is a fragmentary sectional plan taken substantially on line A A in Fig. 1, showing the coil for heating the feed-water. Fig. 4c is an edge view of said coil. This coil is seen in transverse section at the right side in Fig. 1.

B is the generating-cylinder arranged vertically in the center of easing A.

O is the annular grate or fire-bed, and D the ash-box.

E is the circulation-cylinder set upright in the generating-cylinder, and open at the top but closed at its bottom. This cylinder E is of less diameter than cylinder B, and being set concentric therewith an annular space or chamber e is left between them. The cylinder E rests at its lower end on brackets e, as seen in Fig. 1, or on other like supports in cylinder B, and extends quite up to the water-level so of the generator.

F are the generating-tubes, which have the loop-like or horseshoeform illustrated in Fig. 4, when seen in plan. These tubes, where arranged below the water-level, open into the annular space 6 between the cylinders B and E and are expanded at both their upper and lower ends in the shell or plate of cylinderB;

but their upper ends are connected with the inner cylinder E by means of extension-thimbles g, which extend across the annular space 6 and enter said cylinder E. The flames and heated gases from the fire-bed pass up through and among the tubes F and escape at the chimney a.

I11 Patent No. 309,727, before referred to, the water flowed downward in the inner cylinder of the generator, outward from this cylinder into the generating-tubes, upward through said tubes, impelled by the heat, and back into the annular chamber or space between the outer and inner cylinders, while the current was upward in the outer cylinder. I find that this construction'of the generator tends to produce an unequal temperature of the water in the cylinders, the central column having a lower temperature than the outer column. In the present construction I have changed the extension-thimbles g from the lower to the upper endsof the generatingtubes F, thus compelling the water to flow from the annular chamber 6. out through the tubes and back into the inner cylinder E, in which cylinder the steam rises and escapes into a steam-space above the water-line.

For convenience in constructing and mounting the inner cylinder E, I construct it of sections, (see Fig. 2,) each of which is perforated to receive a tier of eXtension-thimbles g, and these sections are furnished with suitable angle-pieces b b, which serve as stops or shoulderswhen the sections are fitted together. It is not essential that the joints of the inner cylinder shall be steam-tight, and it greatly facilitates the setting up of this cylinder in the construction of the generator to make it in sections, which need not be fastened together. That part of the cylinder below the tubes may be made in a single section.

Above the water-level of the generator, and, consequently, above the inner tube E, the space Within the cylinder B forms the steamspace, and the tubes F above the water-line are utilized as drying and superheating tubes for the steam.

A little way above the water-level in the cylinder B is arranged a conical deflector 0, against which the saturated steam strikes in rising into the steam-space from cylinder E. This causes the steam to give up the water held in suspension, and the steam thus partially dried flows through the tier of tubeapertures next below said deflector, "passes up through that tier of tubes, and enters the chamber again above the deflector. .Above the deflector c the steam-space in the cylinder B is divided into a number of chambers by partitions or diaphragins d d, the upper ends of one tier of generator-tubes discharging into each chamber at its upper part and the lower ends of another tier taking steam from the lower part of said chamber and carrying it up to the next chamber above. Finally, the steam enters the steam-dome G at the top of the cylinder B, from which a steamsupply pipe K leads it to the engine or other point where it is required. The course of the steam through the several tiers of drying and superheating tubes F is clearly illustrated in Fig. 3, in which View only a few of the tubes of each tier are shown in place in order to render the illustration more clear.

Just above and preferably resting on the upper tier of radial superheating-tubes is the feed-water coil L, which is arranged in a flat spiral coil, with the spirals set quite close together, so that the coil acts as a baffle to the descent of the hot gases on their way to the chimney or flue. The water enters the coil at the inlet Z, flows round and round through the spiral, which embraces the cylinder B, thence out through the radial branch 1*, down through the vertical branch Z, and enters the base of the cylinder B at 1 I arrange the branch Z' to deliver the feed-water to the cylinder B below the fire-bed in order that the feed-pipe may be convenient of 'access; but the feed-pipe might pass through the shell of the cylinder B at the upper end of the latter and then pass down inside of said cylinder to some point below the waterline. This change of position of the feedpipe will be obvious to any skilled workman.

Having thus described my invention, I claim- 1. A steam-generator having an upright cylindrical generator, provided with tiers of double-branched radial obliquely-arranged generating-tubes, both branches of which enter the said generator, the upper ends extending farther into the interior of said cylinder than the lower ends, and said tubes being arranged about the whole periphery of the cylinder, whereby an upward current is established atthe axis of the latter, as set forth.

2. In a steam-generator, the combination, with the upright generator-cylinder and the lesser inner cylinder E, closed at its bottom, of the double-branched generating-tubes arranged below the water-level, the lower branches of which enter the generator-cylinder, and the upper branches of which connect with the said inner cylinder, substantially as described and shown, and for the purposes set forth.

3. In a steam-generator, the combination, with the upright generator-cylinder and the double branched generating tubes, of the inner cylinder E, constructed of sections provided with angle-pieces, as b, at their ends, whereby said. cylinder may be conveniently built up within the generator-cylinder.

4. In a steam-generator, the combination, with the generator-cylinder, provided with diaphragms or partitions arranged above the Water-level, of the double-branched radial steam drying and superheating tubes arranged about the entire periphery of the cylinder, the lower ends of the tubes tapping said cylinder below one of said partitions and the upper ends tapping it above the same, as set forth.

5. The combination, with the upright generator-cylinder and the radial tubes connecting therewith, of the feed-water-supply pipe arranged in the form of a fiat coil about the upper part of said cylinder above said radial tubes and communicating at one end with said cylinder, substantially as set forth, whereby it forms a baihe and is exposed to the heat of the ascending gases.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

THOMAS Fl MORRIN.

Witnesses:

HENRY GoNNE'rT, J D. OAPLINGER.

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