US641318A

US641318A - Feed-water heater.

Info

Publication number: US641318A
Application number: US70634399A
Authority: US
Inventors: Charles D Mosher
Original assignee: Individual
Current assignee: Individual
Priority date: 1899-02-21
Filing date: 1899-02-21
Publication date: 1900-01-16
Anticipated expiration: 1917-01-16

Description

No. 64I,3|8. Patented ian. i6, |900..

C. D. MOSHER.

FEED WATER HEATER.

(Application led Feb. 21, 1899.)

(No Model.)

MTM-:SEEE

nrrsnY STATES PATENT Qrrrcn.

CHARLES D. MOSHER, OF NEW YORK, N. Y.

FED-WATER HEATER.

SPECIFICATION forming part of Letters Patent N o. 641,318, dated January 16, 1900. Application filed February 21 1899. Serial No. 706,343. (No model.)

To ctZZ whom it 12u07/ conce/n.-

Be it known that I, CHARLES D. MosHER, of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Feed -Water Heaters, of which the following is a specification.

This invention relates to feed-water heaters; and it has for its object to provide a construction in which the feed-water may be subjected to successively-increasing degrees of temperature.

It also has for its object to 'provide a heater in which a portion of the exhaust from' each of the cylinders of a multiple-expansion steamengine may be utilized to heat the feed-water.

The invention further has for its object to provide a sectional feed-water heater in which provisions are made for maintaining a steamsupply at different pressures and temperatures in the dierent compartments or sections of the heater.

Other incidental objects of the invention will appear when the same is more fully explained hereinafter.

Of the accompanying drawings, forming a part of this specification, Figure 1 represents a top plan view showing a feed-water heater constructed in accordance with my invention, part being in section, and a quadruple-expansion steamengine connected with the heater. Fig. 2 represents a detail sectional view, on an enlarged scale, showing the construction at the point of passage of a tube through one of the tube-sheets. Fig. 3 represents a modification of the above.

The same reference characters indicate the same parts in all the figures.

Referring to the drawings, a designates an elongated cylindrical shell or casing having semispherical ends d2 cand a series of transverse partitions d d', dividing the heater into a number of intermediate sections or compartments 2 2 and two end compartments 3 3. The end compartment 3 at the left of the heater is provided with an inlet-pipe a3 for the reception of feed-water, and the compartment 3 at the right is provided with an outlet-pipe a4 for the delivery of the water. A series of tubes d5 a5 pass through the several partitions or tube-sheets a and connect the two end compartments 3 to each other, there'- by forming a continuous conduit for the feedwater which traverses the several intermediate compartmentsv 2. The spaces surrounding the tubes or pipes in the latter constitute independent chambers separated by the partitions a and adapted to receive different bodies of steam from suitable sources. For the purpose of deiiecting the steam in its passage through said chambers or compartments baies a6 a6 may be provided therein, each baffle extending transversely from the side wall and part way across its compartment.

as a8 represent branch pipes connected with the bottoms of the several compartments 2 and leading into a common longitudinal pipe d10. The several branch pipes are provided with traps a9 a9, and the whole arrangement serves to drain off the water of condensation from the heater. Adjoining compartments 2 are connected by means of pipes b4 b5 h6, in each of which is placed a reducing-valve d. The last compartment 2 at the left is provided with an outlet-pipe al, which may lead to a condenser.

@represents a quadruple-expansion steamengine having high, first and second intermediate, and low pressure cylinders o c2 c3 c4 and a main exhaust-pipe c5 for the low-pressure cylinder. The exhausts from the several cylinders of the engine are connected to the several steam-compartments of the feed-water heater by means of branch pipes b b b2 bs, the first pipe b taking steam from the exhaust of the high-pressure cylinder c' and conducting it to the rst heating-compartment 2 at the right, the pipe b connecting the exhaust of the first intermediate c2 with the second compartment 2, the pipe b2connecting the exhaust of the second intermediate c3 with the third compartment 2, and the pipe b3 connecting the main exhaust-pipe c5, which takes steam from the low-pressure cylinder c4, with the last compartment 2 at the left. To save piping, the branch pipes b b2 bare connected with the lefthand legs of the several looped pipes b4 b5 h6.

Figs. 2 and 3 represent two different methods of making the joint between the diaphragms or tube-sheets d andA the tubes a5. In Fig. 2 an externally-tapered bushing a12 is driven into the aperture in the tube-sheet through which the tube passes and in so doing slightly necks or contracts the tube, the bushing being longer than the thickness of the tube-sheet and being slightly tapered on the outside iinds the least resistance when it is driven through the aperture in the direction of the tube a5, so that bushing and tube become slightly contracted as the bushing is driven in, and as the bushing reaches the opposite side of the tube-sheet its diameter slightly increases because of the resistance offered by the tube and the removal of the resistance offered by the walls of the aperture in the tube-sheet, thus making a tight permanent joint. In Fig. 3 an expansible bushing am surrounds the pipe at the end of a tapped counterbore in the tube-sheet, and a gland am screws into said bore and against the bushing a, expanding the latter against the tube a5 and forming a tight joint.

Each of the heating-compartments 2 of the feed-Water heater receives through its branch pipe b b', rbc., a small portion of the exhauststeam from one of the cylinders of the engine c. These bodies of steam naturally vary in pressure and temperature, and hence the feedwater which passes through the heater in the direction of the arrow shown in Fig. 1 from the inlet a3 to the outlet c4, filling the chambers 3 and the tubes a5, is subjected successively to increasing degrees of temperature in its passage from one end of the heat-er to the other. In passing through the irst chamber, which receives its steam from the low-pressure exhaust c5, the feed-Water is heated to, say, 130 Fahrenheit. In the second chamber, which receives its steam from the second intermediate cylinder, the water is heated to a somewhat higher temperature, and so on in each successive chamber or compartment until the water finally emerges from the heater at a sufliciently high temperature to pass with advantage directly into the boiler. The pressure-reducing valves dare set so as to maintain the proper pressure in each of the sections of the heater corresponding to but slightly lower than the pressure in the cylinder with which said chamber is connected, and said valves are also preferably regulated so as to produce a flow of the steam in the direction of the condenser-pipe a7. This iiow from the first branch pipe b into the heating-compartment 2 at the right and through the successive compartments past the several redu cing-valves is regulated by the said valves, so that in its passage through said valves the pressure and consequently the temperature of the steam are successively reduced. The inlowing steam from the several branch pipes b b', die., is deflected by the baffe-plates a, so as to come thoroughly into contact with the tubes a5 in the compartments 2.

It will be seen that the above-described construction and arrangement of lapparatus provides for a very economical use of steam and permits the feed-Water to be heated to a very high temperature before leaving the heater by steam that has already been used in one or more engines.

It will be understood that'the several compartments of the heater, or any ot' them, might be connected with the exhaust of auxiliary engines, pumps, or other apparatus using steam, and it will be further understood that the invention is not confined to the exact design here shown, as any number of separate and distinct heaters might be connected in series by pipes, so that the water to be heated may pass from one heater to the next and be successively heated by steam of increasing degrees of pressure and temperature.

I claimlr. A Vfeed-water-heating apparatus having provisions for subjecting the feed-water successively to diierentdegrees of temperature, in combination with a plurality of dierent heaters connected with said apparatus and adapted to `furnish heat thereto at said dierent temperatures, said heaters being respectively connected with the exhausts of a plurality of different-pressure steam-engine cyl: inders.

2. A feed-water-heating apparatus comprising a series of separate heaters, a feedwater conduit common to the several heaters, and a series of independent inlets to the several heater-s, connected respectively with the exhausts of a plurality of different-pressure steam-engine cylinders.

3. A feed-Water heater comprising a series of separate `heating sections or compartments, provisions for admitting steam thereto from the exhausts of a plurality of different-pressure steamengine cylinders, a feed-water conduit common to the several compartments, connections from one compartment to another, and pressure-reducing valves in said connections, whereby different steam pressures and temperatures are maintained in the several compartments andthe feed-Water is subjected successively to different degrees of temperature.

4. A feed-Water heater comprising a series of lsepa-rate heatingsections or compartments, a feed-water conduit common to the several compartments, a series-of independent steaminlets to the several compartments, adapted to be connected to a number of dierent sources of steam, connections from one compartment to another, and pressure-reducing valves in` said connections, whereby diierent steam-pressures and temperatures are maintained in the several compartments and the feed-Water is subjected successively to different degrees of temperature.

5. The combination with a multiple-expansion steam-engine, of a feed-water heater hav- `ing a series of separate heating sections or compartments, a feed-Water conduit common to the several compartments, and connections between the several compartments and the exhausts from the several cylinders of the engine, whereby steam at dierent degrees of pressure and temperature is admitted to the respective compartments, andthe feed-water is thereby subjected successively to different degrees of temperature.

6. The combination with a multiple-expansion steam-engine, of a feed-water heater having a series of separate heating sections or compartments, a feed-Water conduit common to the several compartments, connections between the several compartments and the exhausts from the several cylinders of the engine, whereby steam at different degrees of pressure and temperature is admitted to the respective compartments, connections from one compartment to another, and pressurereducing valves in said connections, whereby successively-decreasing pressures and temperatures are maintained in the several compartments and the feed-water is subjected to successively-increasing temperatures.

7. Afeed-water heater comprisinga casing, a series of three or more transverse partitions dividing said casing into a number of separate heating-compartments, and two watercompartments at the ends, said end compartments having respectively an inlet and an outlet for feed-water, a series of tubes connecting said end compartments and traversing the heating-compartments, and inlets to the several compartments for the admission of steam from the exhausts of a plurality of diEerent-pressure steam-engine` cylinders.

8. A feed-waterheater,comprisingacasing,

one or more transverse partitions dividing said casing into a number of separate heating-compartments, aseries of feed-water tubes traversing said compartments, an inlet to each compartment for the admission of steam from a number of independentsources, a pipe connection between each compartment and its neighbor, and a pressure-reducing valve in each of said connections, whereby different pressures and temperatures are maintained in the several compartments and the feed- Water in the tubes is thereby subjected successively to different degrees of temperature.

9. In apparatus of the character specified, the combination of a series of separate heating sections or compartments, a feed-water conduit common to the several compartments, a series of independent steam-inlets to the several compartments and connected with the exhausts of a plurality of different-pressure steam-engine cylinders, branch pipes connected with the bottoms of the several compartments and communicating with a drain-pipe common to all, and drain-traps in said branch pipes.

In testimony whereof I have aixed my signature in presence of two Witnesses.

CHARLES D. MOSHER.

Witnesses:

ROLLIN ABELL, C. F. BROWN.