US2588310A - Boiler - Google Patents

Description

March 4, 1952 H. VEYSSIERE 2,588,310

BOILER Filed April 6, 1949 Y 2 SHEETS-SI-IEET l fie].

INVENTOR HENRI VEYSSIERE BY HIS ATTORNEYS M MWW March 4, 1952 H. VEYSSIERE 2,538,310

BOILER Filed April 6, 1949 2 SI-1EETSSI-IEET 2 INVENTOR HENRI VEYSSIERE Y l-us ATTORNEYS MMJM Patented Mar. 4, 1952 UNITED STATES PATENT OFFICE BOILER Application April 6, 1949, Serial No. 85,837

In France April 8, 1948 3 Claims. 1

This invention relates to steam-generating boilers of the type including an upper waterand-steam-drum having a number of secondary collectors, herein called headers, openin into it, said, headers having connected therewith the nests of boiler tubes lining the front and rear walls of the boiler.

More specifically, my invention relates to an improvement in such steam-generators primarily with the object of minimizing the harmful effects generally accompanying the formation of waterand-steam emulsion or foam therein.

It is an object of the invention to provide for a continuous escape of any foam-like emulsion that may tend to form in a header of the boiler.

It is a related object to prevent the projection of any such foam or emulsion into the steamtakeoff outlet of the boiler drum.

Another object is to provide means for controlling the supply to the upper boiler headers of water coming directly from the boiler drum. thereby to prevent the occurrence of condensation and water-hammer eifects in said headers.

With the above and related objects in view, my invention provides an arrangement which essentially consists in the provision, at the points at which the headers connect with the upper boiler-drum, of cup-like elements open upwardly along a plane substantially parallel with and slightly above the normal water-plane in the boiler drum, said cup-like elements being each preferably formed with small apertures in the immersed bottom thereof, so as to insure a condition of static hydraulic equilibrium between the body of water contained in said elements and that contained in said drum.

One exemplary embodiment of my invention will now be described for a purpose of illustration and not of limitation, in connection with the accompanying drawings, in which:

Figure 1 shows in longitudinal, section part of the upper boiler drum adjacent the point of connection of a header therewith embodying the improvements of my invention;

Figure 2 is a section on line 2-2 of Fig. 1;

Figure 3 is a diagrammatic general view of a steam-generator embodying the improvements of my invention.

In the drawings, a designates the upper, steamand-water boiler drum of a steam-generator of the type described, having a header b opening into it. vaporizing tubes are connected with the header. The letter d indicates a water downcoming tube, and e is the steam-collector.

The device of the invention essentially comprises a cup-like deflector element 1 arranged in front of the mouth of the header b so as to direct any boiler-foam or emulsion tendin to pass therefrom into the drum, onto and over the surface of the water in said drum. The cup-like element f is provided with a single top outlet in a plane parallel with the normal water-surface in the boiler and slightly above that surface. A hole of small diameter ii is formed near the bottom of the element f to insure that a static balance obtains in the hydraulic system thus produced. To complete the device. screens of expanded metal or the like 9 are arranged to prevent direct entrainment of foam into the steam takeofi outlet or into the tubes leading to the steam-collector or header e as shown.

What I claim is:

1. In a steam generating boiler, an upper boiler drum having water at a level to partially fill said drum, a header opening into said drum at said water level and partially filled with water, and

a plurality of vaporizing tubes connecting with said header below said water level, the provision of an upwardly open cup-like element in said drum across the junction of said header with said drum, the top of said element being open along a plane parallel with and slightly above the water surface in said drum and the zone over said top being unimpeded, said cup-shaped element having a surface positioned relative to the outlet from the header and to the surface of the drum above the cup-like member to direct the water-steam emulsion from the header over the surface of the water in the drum and whereby the flow of said emulsion from the header into the drum is held steady.

2. In a steam generating boiler as claimed in claim 1 wherein said element has an aperture adjacent the bottom thereof to insure static hydraulic balance.

3. In a steam generating boiler as. claimed in claim 1 having a vertical perforated screen memher in said drum adjacent said cup-like element and between said cup-like element and the steam outlet whereby the entrainment of foam from said emulsion into the steam outlet is prevented.

HENRI VEYSSIERE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 544,168 Hallowell Aug. 6, 1895 1,981,865 Jones Nov. 27, 1934 2,290,882 Keenan, Jr July 28, 1942 2,378,429 Place June 19, 1945 2,395,873 Jones et a1. Mar. 5, 1946

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