US1481883A

US1481883A - Steam superheating system for marine boilers

Info

Publication number: US1481883A
Application number: US285028A
Authority: US
Inventors: John P Badenhausen
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-03-25
Filing date: 1919-03-25
Publication date: 1924-01-29
Anticipated expiration: 1941-01-29

Description

Jam

29, 1924. 1,481,883

J. P. BADENHAUSEN STEAM SUPERHEATING SYSTEM FOR MARINE BOILERS Filed March 25 1919 2 Sheets-Sheet l j INVENTOR WITNESS A TTORNEYS jam 2% m4; mawm J. P. BADENHAUSEN STEAM SUPERHE A' IiNG SYSTEM FOR MARINE BOILERS Fzgledflarch 25, 1919 2 sheets Sheea '2 Egg. c5,

WITNE$$ ATTORNEYS Patented an. 29, 1924.

uuirao STATES PATENT ornce.

JOHN P. BADENHAUSEN; F PHILADELPHIA, PENNSYLVANIA.

'STEAM-SUPERHEATING SYSTEM FOR MARINE BOILERS.

Application and Lima 25, 1919. Serial no. 285,028.

To all whom it mag concern:

Be it known that 1, JOHN P. BADEN HAUSEN, a citizen of the United States, residing in thecity of Philadelphia, county of Philadelphia, State of Pennsylvania,

have invented certain new and'useful Improvements in\ Steam-Superheating Systems for Marine Boilers, of which the following is a specification, reference being had to the accompanying drawings, form in a part hereof.

y invention relates to a superheatin system as applied to marine boilers an has for its main objectthe constructing and arranging of a superheati system whereby the heating units thereo i'nay be located in the hottest part of the'combustion chamber, rather than nested in the flue tubes, in order that a greater degree of superheat may be secured.

Anothervobject is to so construct arrange the system whereby steam shall at all times remain in the umts of the systems, notwithstanding that the throttle at times may be closed, with the effect of protecting the units from the burning and other destructive efiects of the hot gases acting upon the 'units.

Another object is to secure the safety 39: valve to the main steam line, leading from the superheating 'imits between the latter and the throttle in order that the safety valve shall act as a relief means for any possible excess ressure that may arise in 5; the heating unlts at the time when the throttle is .dlosed.

the superheatlng units within the chamber through which the hot gases from the fire box pass before they enter. the fire tubes and also to avoid the'disadvantages arising in the old form of superheating system wherein the superheating units are nested within the fire tubes of the boiler.

For the purpose of carrying out my invention I have shown in the accompanying drawing one embodiment thereof and referring to said drawing in which reference characters are used to designate correspondin parts in the vario'usfigures,

ig. 1 is a longitudinal sectional view through a conventional type of marine boiler, showing the adaptation of my im- 'provement thereto; v 55 Fig. 2 is a transverse sectionalview showing the disposition of the superheating units in the hot gas chamber, taken on line 22 of Fig. 1;

Fig. 3 is a horizontal sectional view taken on line 3- 3 of 1 including a top plan view of the superheating units.

Fig. 4 is a transverse sectional view taken on line 4--4 of Fig. 1 showing the superheating units in vertical elevation.

Referring now more particularly to the drawing I have shown thereon a usual form of marine boiler 1 the upper portion of which is provided with a plurality of fire or flue tubes 2 and in the lower portion of which are located the usual fire boxes 3 in which are included the usual grates 4 and the bridges 5. At the rear portion of the. Y boiler are also located the hot gas combustionchambers 6. Theisuperheating system, forming the subject-matter of-my invention, comprises conduits 7 leading from the upper interior portion of the boiler to compartments 8 in headers 9 located in the combustion chamber 6. From the compartments 8 of these headers 9 lead banks of tubes 10 in looped or iliverted U-shape or form extending to the upper portion of the chambers 6 and returnin to second headers 11 located adjacent to e first headers 9.. A second set of tubes'12 leads from these headers 11 to the second compartments 13 of the headers 9 from which finally lead conduits 14 to the outside of the boiler, the same passing through the thimbles 15 traversing the water leg 16 of the boiler 1. -By

v such means the steam in passing succes- It is the object of my invention to locate sively through these groups of tubes receives progressive superheat. The external end of the conduits '14 are provided with fittings 17 from which the steam lines 18 lead upwardly to a connecting fitting 17' and thence-by a steam line section 17" and I a cross fitting 19 secured to the top of the boiler 1. This cross fitting maybe surmounted by any suitable form of safety valve 20 and may be connected throng a lateral port thereof to the main stem ltine 21 leading to a throttle of any suitable cm.

As the gases'or volatile constituents pass from the fire box through the combustion chambers 6 at which time they are practically at their highest temflperature, heat will be more \readily and e ciently extracted therefrom, for heating the steam no through the loops or units 11 and 12, prior to the entry of the gases into the fire tubes 2 of the boiler.

It will be thus seen from the above that the steam flowing into the open inlet ends of the pipes 7 passes into the header 9 to the units or tubes 10 which extend uprightly in the combustion chamber 6 at points where the gases from the fire boxes are at about their highest temperature so that the steam is moreefiectively superheated than if the tubes were disposed within the fire tubes of the boiler. Furthermore, it will also be seen from the above by so arranging the tube units in the combustion chamber in the passage of the hot gases or volatile constituents as they issue from the fire boxes, rather than nesting the units within the fire tubes, that free and unimpeded passage of the hot gases through the fire tubes is permitted. This also permits the use of smaller fire tubes, whereby increased volume capacity of the boiler is obtained; In any form of super heating system where the heating units are disposed within the fire tubes it necessarily follows that to be of any utility it would re.- quire or necessitate making the fire tubes of appreciably larger diameter in order to enclose such units as well as to provide the requisite passage for the flue gases for the proper operation of the boiler. This obviously reduces the volume capacity of the boiler. Moreover. by heating the units within the fire tubes increased resistance is offered to the passages of the flue gases, a disadvantage absolutely avoided in the improvement herein described.

Therefore, by locating the superheating units in the chambers 6 all of the disadvantages mentioned are overcome and, a higher degree of superheat is also obtained than that available in the fire tubes.

In the event that the throttle is entirely closed the steam will still remain in the superheating system to protect the same from the destructive effects of the hot gases and in case that the pressure within the superheating units is increased considerably such pressure will be released by the safety valve, connected in the steam line, and permit the inflow of fresh steam into the superheating units, thereby continuing the protection thereof. The fitting 11 is merely secured to the top of the boiler and does not communicate therewith except through the superheating system.

In addition to the above a small connection 22 in which is'provided a hand valve 23 is adapted to establish connection from the fitting 17 to the water leg 16 of the boiler.

The-purpose of this attachment is that when first starting up the boiler the valve 23 may be initially opened to permit the water in the boiler to flow through the connectioh 22 into the fitting 17 to the pipe 14 and finally into menses closed.

While I have disclosed one embodiment of my invent-ion it is to be understood that the latter is not limited to the particular details herein described and shown but that it may comprehend other and equivalent structures as may come within the spirit of my invention and the scope of the appended claims.

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

1. In a steam generating system comprising a boiler having fire tubes, a fire box, a bridge, a combustion chamber, a water leg, and a crown sheet at the upper end ofsaid combustion chamber, the combination of a header located in said combustion chamber parallel and close to, and just belowthe top of said bridge, a second header provided with two chambers and arranged close and parallel to said first header, a conduit leading from the steam space in said boiler directly through said 'crown'sheet to one of said compartments of said second header, a series of tubes extending from said compartment upwardly in said combustion chamber to a point close to said crown sheet and thence downwardly past the open ends of said fire tubes to said first header, a second series of tubes leading from said first header upwardly past the open ends of said fire tubes to a point near said crown sheet and thence downwardly to the second compartment of said second header and a conduit leading from said second compartment rearwardly through the said water leg to the rear of the boiler and thence to the point of consumption.

2. In a steam generating system com rising a boiler having fireztubes, a fire ox,

a bridge, a combustion chamber, and-a crown sheet at the upper end of said combustion chamber, the combination of a header, located in said. combustion chamber parallel and close to, and just below the top of said bridge, a second header provided with two chambers and arranged close and parallel to said first header, a conduit leading from the steam space in said boiler directly through said crown sheet to one of said compartments of said second header, a-series of tubes extending from said compartment upwardly in said combustion chamber to a point close to said crown'sheet and thence downwardly past the open ends of said fire "tubes to said first header, a second series of tubes leading from said first header upwardly past the'open ends of said fire tubes.

' menses to a point near said crown sheetend thence downwardly to the second compartment of said second heeder,e conduit leading from said second compartment rearwardly to the outside of the boiler and thence to, the point of consumption, and means operative when the superheated steam is not being drawn ed for consumption and the temperature of the steam is high to cause a flow of steam from said boiler through said tubes.

3. In a steam generating system comprising a boiler having fire tubes, a fire box, a bridge, e combustion chamber, a water leg, and a crown sheet at the upper end of said combustion chamber, the combination of a header located in said combustion chamber parallel and close to, and just below the top of said bridge, a second header provided with two chambers and arranged close and parallel to said firstheadcr, e conduit leading from the steam space in said boiler directly through said crown. sheet to one of said compartments of said mcond header, a series of tubes extending from said compartment upwardly in said combustion chamber to a point close to said crown sheet end thence downwardly past the open ends rear of said boiler and thence to the point of consumption.

In witness whereof I hereunto set my hand this 24th day of March, 1919.

JUHN P. BADENHAUSEN.