US1480912A - Feed-water heater - Google Patents

Description

Jan. 15, 1924. 1,480,912

J. MARTIN FEED WATER HEATER Filed Aug. 29. 1921 FEL.

Figl. q /a- Fig.3.-

Patented Jan. 15, 1924.

UNETED STATES JOSEPH MARTIN,'OF MUNICH, GERMANY.

FEED-WATER HEATER.

Application led August 29, 1921. Serial No. 496,736.

(GRANTED 'UNDER THE PROVISIONS OF THE ACT 0F MARCH 3, 1921, 41 STAT. L., 1313.)

T0 all whom it may concern.'

Be it known that I, JOSEPH MARTIN, a citizen oi the German Republic, residin at 40 Bauerstrasse, Munich, Bavaria, ermany, have invented certain new and useful mprovement-s in Feed-Water Heaters (for which I have filed applications in Germany Mar. 6, 1919, Patent No. 341,791; Germany July 21, 1919,`.-Patent No. 350,878; Italy June 30, 1920; Great Britain July 2, 1920, Patent No. 161,879; Belgium July 5, 1920, Patent No. 288,670; France July 9, 1920, Patent No. 520,126; Switzerland July 12, 1920, Patent No. 91,968; Netherlands July 21, 1920, Patent No. 8,003; Czechoslovalria Nov. 24, 1920), of which the Jfollowin is a specification.

(l/ly invention relates to feed-water heaters, and, in particular, to such feed-water heaters in which the feed-Water tubes are disposed vertically and are rolled into an.

elevated water-chamber, which-is subdivided into a plurality of cells for grouping the tubes and thereby regulating the circulation of the water.

It is an essential Jfeature of my invention to provide means for eliminatingy and re-y moving as far as possible the gases, such as air, carbon dioxide and the like, contained in thewater, which gases would cause a rusting of the iron parts, in particular, of the parts made of wrought iron, so that the whole feed-water heater may be made cheaply, ot-wrought iron.

A further objectof my invention is to provide for the purpose of subdividing the water-chambers for grouping the water tubes, a special cell frame, which may be inserted into the vwater chamber and again be removed therefrom. y

A further object of the present invention is to provide means, for allowing of easily shitting the cell frame on its support with,- out it being necessary to caulk the water l tubes which are rolled into the bottom .of

the chamber, and to level said tubes with said bottom.

A further object of the invention is to form the cell frame in the water chamber in such a manner, that a continuous gap is left between said vframe and the roof of the water chamber, through which gap the eliminated gases may pass 0E.

A further object of the present invention is to provide in those Water tubes in which in consequence of the heating, a lively liberation of gases already takes place, means which will have a centrifuging efiect on the water Howing through the tubes, and thereby effect an increased degasilication. v

A further object of the invention is to allow of constructing the whole feed-water heater of wrought iron'.

These and other objects and advantages of the present invention and its design will be fully disclosed in and by the following specification, reference being had to theaccompanying drawing, in which Fig. lis a part of a feed-water heater, shown partly in section;

Fig. 2 is a transverse section through the feed-water heater according to Fig. 1.

Fig. 3 is a plan view of the feed-water heater.

Fig. 4 shows, on a larger scale, a longitudinal section through a part of the water i chamber, the tube ends, the cell frame and the supporting plate for the latter,

In Aa feed-water .heater of the kind as shown in the drawing water-chambers are formed by the two attened tubes a; and b, into the bottoms of which U-shaped preheating tubes c and d are rolled, which alternately connectthe chambers a and b. Cellshaped frames, having no bottoms and covers and being composed of plates e and f. riveted together, are fitted into the chambers av and Z), subdividing these into cells, so

that always one cell of the chamber a is in communication with a cell of chamber b, the communication being made by a preheating tube. The walls of the frame cells are partly perforated, to ensure that the water flows in anpredetermined direction, for instance, through all preheating tubes, one after the other. These cell frames are not of the full height of the water chambers, so that a continuous gap g remains between their upper edgel and the vroof of the water chambers through which gap all cells communicate within one chamber. These cellframes arek separate units and can be inserted into and removed from the water chambers if the latter are provided with a suitable door. The water chambers could also be welded close, after the cell-frames have been fitted into them.y but it is of advantage to provide a scalable door, for inserting and removing the cell-frames in order to obtain sufficient clear space in the water chambers in case of repairs and for cleaning the heater. With the said cell-frames also the inner closures 7L which are provided in the covers of the water chambers opposite to the openings of the preheating tubes c and d, may be inserted and removed and placed aside.I For facilitating the moving of the said cell4frames within the water chambers, I' provide between theV bottom of the water chamber and the cell-frame a plate z', (Fig.

water, such as air, carbon dioxide and the like, which gases would particularly favor such rusting. These means consist of strips of sheet metal, which are helically twisted and which after being inserted into the preheating tubes, cause a whirling of the water fiowing rapidly throughv the tubes. These whirls have the effect that the gas particles are driven away from'- the wallsr of the :tubes towards the' center, where they rise along the said twisted sheet metal strips. I may employlsuchtwisted strips in all feed water tubes, but this would produce a rather great resistance for the water, so that the pressure of the feed water would have to be very high. I therefore provide such twisted strips only in those tubes, which, in consequence of their high temperature, already have a considerable elimination of gases. In theV feed water heater shown, such twisted strips are fitted into the tubes le, Z and m, in the assumption that these tubes show the greatest elimination of gas owing to their raised temperature. These twisted strips n are provided with narrow, rectangular slots 0 extending longitudinally, which slots serve to collect the gas bubbles when the water is still, and to offer them a possibility of adhesion, so that the walls of the tubes remain as free as possible of gas bubbles, even when the water is quiet andnot moving. By such an arrangement of the twisted strips it is attained that, without any uneconomic raising of` the water pressure, the elimination of gas is soV complete, that rusting will not take place even in those tubesin which the strips are net-4arra. n"get l. ,y The gases' eliminated rise' in the' tubes 7a', l, m, etc., collect above the cellframes in the chambers a and b in the continuous small air passage g, whence they are allowed to pass olf.

The water chamber may also be composed of more than two flattened tubes, as shown, each tube containing its cell frame, and the individual cells of the several chamber tubes being alternately connected by the pre'heating tubes;

By this arrangementI obtain a feed. water heater which is light and may be cheaply constructed of. wrought iron, and kwhich is, in all parts, readily and quickly accessible for the purpose of cleaning and making repairs, and in which the danger of rusting is reduced to a minimum.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is: 1

1. In a feed-water heater an elevated water chamber, a removable; cell frame in said water chamber, a small air passage connecting all cells being provided between thevcell frameY and the roof of the chamber, and the cells being connected in pairs by preheating tubes.

2. In a feed-water heater an elevated water i chamber, a removable vcell frame in said water chamber, a perforated plate between" the cell frame and the bottom of thechamber, the cells being connected in pairs by preheating tubes, andthe ends ofV said prehe'atVF ing tubes entering the holesv in saidper forated plate. l

3. In a feed-water heaterk an elevated water chamber, a cell frame in said water cham- .e

ber, a continuous smallair'passage' between the cell frame and ythe'eover of the'chamb'er, the cells being' connected in pairs by preheating tubes, and twisted stripsV of sheet metal being arranged in the preheatin'g tubes.

4. In a feed-water heater an elevated water chamber, a cell frame in saidwater chamber, a continuous small air passagebetween the cell frame and the cover of the chamber, the cells being connected in pairs by preheating tubes, twisted strips of sheet metal in said preheating tubes, and longitudinal, rectangular slots in thelsaid sheet metal strips.

5; In a feed-water heater an elevated water,

chamber, a cell frame in saidywater chamber, a continuoussmall air passage between the cell frame and the cover of the chamber, the cells being connected in pairs by preheating tubes, twisted strips of sheet metal in those preheating tubes, in which, in consequence of their high temperature a high elimination of gases appears, .and longitudinal, rectangular slots in said sheet. metal strips.

6. In a feed-water vheater a plurality of.

wrought iron liattened tubes, a removable cell frame in each tube, a ,continuous small air passage between thecell frame an'drf of the tube, a perforated plate between cell frame and bottom of the attenedtube, each cell in the one flattened tube communicating through a preheating tube with a cell in 5 another attened tube, the ends of said preheating tubes entering into the holes in said perforated plate, twisted strips of sheet metal in those preheating tubes in which,

owing to their high temperature a high elimination of gas occurs, and longitudinal, l0

rectangular slots in said sheet metal strips. In testimony whereof I aix my signature.

JOSEPH MARTIN.

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