US1167841A - Steam-generator. - Google Patents

Description

J. H. ROSENTHAL &E. C. CARNT. STEAM GENERATOR.

APPLICATION FILED JULY 20,1911.

1,167,841 Patented Jan. 11, 1916.

2 SHEETS-SHEET l- .I. H. ROSENTHAL & E. C. CARNT.

STEAM GENERATOR. Arum/11101111120 JULY 20, 1911.

Patented Jan. 11, 1916.

2 SHEETS-SHEET 2.

SAMUEL WHITE & COMPANY, LIMITED, or EAST STEAM-GENERATOR.

Specification of Letters Patent. Patented Jan, 11, 1916,

Application filed July 20, 1911. Serial No. 639,477.

To all whom it may concern:

Be it known that We, JAMES HERMANN ROSENTHAL and EDWIN CHARLES CAnN'r, both subjects of the King of the Unlted Kingdom of Great Britain and Ireland, and residing at London, England, and East Cowes, Isle of Wight, England, respectively, have invented a certain new and useful I mprovement in Steam-Generators, of whlch the following is a specification.

This invention relates to improvements in superheaters applicable to water-tube steam generators having a common overhead steam and water drum connected by banks of tubes to separate water drums arranged on each side of the furnace'below and parallel to the overhead drum.

More particularly the invention contem plates an improved arrangement of the superheater in relation to the boiler tubes, and an improved arrangement of the tubes of the superheater in relation to the manifolds or boxes thereof, as hereinafter more fully described.

In the accompanying drawings Figure 1 is a longitudinal vertical section, Fig. 2 is a part elevation part vertical cross section,

and Fig. 3 is a plan showing by way of example a steam generator of the type referred to equipped with superheaters constructed and arranged in accordance with the invention; Figs. at, 5 and (3 show details of the superheater.

It will be seen that each orifice in each row is spaced from oneof the two adjacent orifices in the same row a distance exceeding the diameter of a U-tube; that each U-tube is spaced from the water tubes forming the upper wall of the oval chamber a distance exceeding the diameter of a U-tube and that the U-tube at each end of the chamber is spaced from the nearest drum a distance exceeding twice the radius of curvature of such U-tube, that is a distance exceeding the distance between the two limbs of the U-tube. It will also be seen that by properly selecting the zone in which the superheater is placed, that is to say, disposing the surface of the fireside of the superheater relative to the surface of the uptake side of the superheater as shown,

it is possible to maintain a constant in the. space between -E and the degree of superheat at whatever rate the boiler is being worked.

he superheater shown comprises juxtaposed manifolds or boxes A and B one side of each of which is provided with orifices to receive the ends of U-shaped tubes G expanded thereinto, and the opposite side of each of which manifolds or boxes A and B is provided with handholes D adapted to be closed by covers in a manner well understood. Some or all of the U-shaped tubes are arranged in pairs, the tubes of each pair being disposed in the same vertical plane and all the tubes being parallel to the axes of the overhead drum E and bottom drums F; one U-tube of each pair being fitted withthe legs of the other U- tube of that pair, so that the orifice into which the four upper ends or the four lower ends of two adjacent pairs of tubes are expanded are accessible through one handhole gn the opposite side of the corresponding In order to accommodate the superheaters, each of the banks of boiler tubes G (or, if a single superheater be used, one of the banks) is subdivided into two sub-banks or semibanks, the tubes of the two sub-banks being oppositely curved, that is, curved concavely relatively to each other, so as to afford between them a chamber H of substantially oval formation in cross section, the major axis of which lies in a plane considerably inclined to the vertical.

As shown, the superheater boxes are inclined to correspond with the inclination of the major axis of the oval chamber, and as the tubes fitted within said chamber lie in approximately vertical planes, it will be understood that an extensive staggering of the tube hole is provided and a considerable distance afforded between the holes for receiving the two ends of each U-tube, so as .to provide for a large radius of curvature at the bend of the U-tube. I

As shown, valved pipe connections I and J are interposed between the overhead drum superheater on the one hand, and between the superheater and the main steam supply pipe on the other hand.

. ing

drum, there being one of said ateach side. of the steam and watch drum,

. each direct path Having now described our invention what we claim and desire to secure by Letters Patent of the United States is 1. A steam generator, comprising a combustion chamber, an ofltake for the gases, a steam and water drum, a mud drum below the steam and water drum and at one side thereof, a plurality of sets of inclined water tubeswithin the combustion chamber and in thedirect path of the gases to the ofltake flue and connecting the steam and water drum to the mud drum, headers at one end of the generator, U-shaped superheater tubes connected to said headers, both legs of said tubes extending in a longitudinal direction between the sets of Water tubes and at approximately right angles to the water tubes, the arrangement being such that the gases in passing from the combustion chamber to the ofitake flue will pass transversely over one set of water tubes, the superheater tubes, and then the second set of water tubes with:

out changing the general course of gases; substantially as described.

2. A steam generator, comprising a combustion chamber, an odtake flue for the gases, a steam and water drum, a plurality of mud drums below the steam and. water a' plurality of sets of water tubes connecting mud drum with the steam" and 'water drum within the combustion chamber and in the direct path of the gases to the ofltake flue, headers at one end of the generators,

and U-shaped superheater tubes connected to said headers the legs of said tubes extendsets of water tubes and at approximately right angles to the water tubes on the opposite sides of the respective spaces, the arrangement being such that the gases in passing from the combustion chamber to the 0% take flue will pass approximately over the water tubes and the superheater tubes without changing the general course of the gases; substantially as described.

3.) A steam generator, comprising a steam and water drum, a mud drum below the steam and water drum and at one side thereof, a plurality of sets of inclined water tubes within the combustion chamber and in the of the gases of the ofitake flue connecting the steam and water drum to the mud drum, headers at one end of the generator, and U-shaped superheater tubes connected to said headers, both legs of said tubes extending in a longitudinal direction between the sets of water tubes and at approximately right angles to the Water tubes, the upper legs of the intermediate tubes being approximately central between both legs of an adjacent tube, while the lower legs of the intermediate tubes are approximately centrally located between the legs of an adj amud drums in a longitudinal direction between the met/ear cent tube at'the other side, the arrangement 4. A steam boiler, having a smgle combustion chamber extending from one side of the setting to the other, a central steam and water drum, two mud drums below the steam and water drum, there being one amid drum on "each side of the combustion chats her, two banks inclined tubes one on each side of'the setting bent to substantially the same radius Within the combustion chamher and in the direct pathof the gases to the ofltake and connecting the steam and waterdrum with the mud drums, each bank being-divided into two groups so as to form betwefen themian oval chamber having an ,inclinedmajor axis, a superheater in each chamber between the groups comprising parallel and contiguous header boxes in ap-' proately the same planeas the major axis of the chamber, and U these header boxes 1 u ng transversely across jlthe banks of water tubes within the oval chamber, one end of each U-tube being connected to one end to 'the other header box; substantially as described.

,5. A steam boiler, having a single combustion chamber extending rom one side of the setting to' the other, a central etc and water drum, two mud 'drums below the "steam and water drum, there being one mud drum 3n each side'ot the combustion chamber, two banks of inclined tubes 'one on each .side of the setting bent to substantially the same radius within the combustion chamber and in the direct path of the gases to the odtake flue and connecting the steam and water drum with the mud drums, each bank being divided into two groups so as to form be tween them an oval chamber having an nheader box and the other a. etubes connecting clinedw major axis, a superheater 1n each chamber between the groups comprising parallel and contiguous header boxes in approximately the same plane as the major axis of the chamber, and U-tubes connecting these header boxes extending transversely across the banks of water tubes within the oval chamber,"one end of each U- tube' being connected to one header box and the other end to the other header box, the upper header being divided into two parts, the steam entering one of the compartments of the upper box and then passing through the U-tubes to the other header, and from the last mentioned header to the steam od take through the other compartment of the first mentioned header; substantially as described.

6. A steam boiler, having a single combue ma same radius within the combustion chamber and in the direct path of the gases to the ofitake flue and connecting the steam and water drum with the mud drums, each bank being divided into two groups so as to form between them an oval chamber having an inclined major axis, a superheater in each chamber between the groups comprising parallel and contiguous header boxes in approximately the same plane as the major axis of the chamber, and U-tubes connecting these header boxes extending transversely across the banks of water tubes within the oval chamber, one end of. each U-tube being connected to one header box and the other end to the other header-box, the upper header being divided into two parts, the steam entering one of the compartments of the upper box and then passing through the U-tubes to the other header, and from the last mentioned header to the steam ofl'take through the other compartment of the first mentioned header, the arrangement being such that the entering steam flows in parallel through half of the U-tubes while the steam leaving the superheater flows in parallel through the other half of the U-tubes; substantially as described.

In testimony whereof we have signed our names-to this specification in the presence of two subscribing witnesses.

JAMES HERMANN ROSENTHAL.

' EDWIN CHARLES GARNT.

Witnesses: y

WALLACE ORANSTON FAIRWEATHER, J OHN MCCLEABY.

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