US1793178A - High-pressure boiler - Google Patents

Description

Feb. 17, 1931. w. A. J. KREAGER HIGH PRESSURE BOILER Original Filed June 1, 1929 Patented Feb. 17, 1931 UNITED STATES PATENT OFFICE WILLIAM A. J. KREAGER, OF DENVER, COLORADO, ASSIGNOB, BY MESNE ASSIGN- MENTS, TO BARQUE ROYALTY, INCL, DENVER, COLORADO, A CORPORATION OF COLORADO IIIGH-PRE SSURE BOILER Application, filed June 1, 1929, Serial This invention relates to improvements in boilers oi the type employed for the production of steam under high pressure.

It is the object of this invention to produce '6 a high pressure steam boiler which is designed for use with gas or liquid fuel and which is so constructed that it will give a very high thermal efliciency.

This invention briefly described consists of two cylindrical boilers, which are located one above the other and which are interconnected near one end. The upper'boiler is provided with a cylindrical combustion chamber which is located substantially at its center or slight- 15 1y below the center and which is connected with one end of the boiler only. The inner end of the combustion chamber is provided with a header and the interior of this header is connected with an annular header located near the front end of the boiler, by means of fines. The lower boiler has its front end inwardly recessed and provided with a. large number of fines which extend rearwardly and communicate with the interior of a header 25 located a short distance from the rear end of the boiler. A. cover is provided for the recess in the front end of the lower boiler, and this is divided into two compartments by me ans of a transverse partition. The interior of the upper compartment is connected with the interior of the annular header and the lower compartment is connected with a pipe leading to the outside of the building in which the boiler is located.

Having thus briefly described the construction, the same will now be described in detail, and for this purpose reference will be had to the accompanying drawing in which the preferred embodiment ofthe invention has been illustrated, and in which:

Fig. l is a front elevation of the boiler;

Fig. 2 is avertical longitudinal section taken on line 22, Fig. 1; and V Fig. 3 is a transverse section taken on line 3-3, Fig. 2.

In the drawing numeral 1 represents the upper boiler and numeral 2 the lower boiler. The lower boiler is supported from the fioor by means of transverse bars 3 that extend between the vertical channels 4. These ver- No. 367,664. Renews-(1.31113 3, 1930.

tic-a1 channels are connected and held together by means o1 bolts 5; Straps 6 extend between the upper ends of the vertical channels and serve as supporting means for the upper boiler. The upper and lower boilers are both provided with flanged couplings 7. which affords communication between the in terior of the two boilers. The rear ends of the boilers are provided with bulged ends 9 that are riveted to the cylindrical portion in the usual manner. The front end of boiler 1 has secured to it an end plate 10, whose out er edge is riveted to the outwardly extend ing flange 11 of an angle iron, whose other flange 12 is connected to the cylindrical portion 1. Plate has a central opening through which the cylindrical combustion chamber 13 extends and is connected with the plate by being welded thereto. The

front end of member 10 is closed by means of n a plate 14 through which the burner 15 extends. The inner end of member 13 is provide-d with a header 16 from which flues 17 extend forwardly and are connected with the interior of the annular header 18 which, in this case, is formed integral with the plate 10. The lower boiler is provided with a boiler head 19 which is secured to the cylindrical portion of the boiler by means of rivet 20 in the manner described in connection with the upper boiler. The boiler head 19 is in wardly recessed as shown in Fig. 2 and is provided with a large number of openings in which are located flues 21. The other ends of these fiues communicate with the interior of the header 22. For the purpose of establishing communication between the annular header 18 and the lines 21, a conduit 23 has been provided. This conduit is welded from sheet steel and has a width somewhat less ihan the diameter of the boiler as shown in *ig. 1. flanges 24: which are perforated for the reception of bolts by means of which it is secured in place. An angle iron 25 extends transversely of the recessed boiler head 19 and when the conduit 23 is in place, it serves as a support for the latter and also as a partition wall. From Fig. 2, it will be seen that the interior of header 18 is in direct commu- This conduit is provided with nication with the lines 21 that are located above the partition 2. A pressed sheet steel member 26 is secured at its upper edge to the downwardly extending flange of the angle iron and has its edges secured to the boiler head 19 and serves to form a chamber 27 with which the lines below the angle 25 communicate. Chamber 27 is in communication with a flue outlet 28 through which the flue gases pass after they leave the boiler. The feed water enters the boiler through openings in the bottom and for this purpose openings 29 and 30 have been provided, either or both of which may be used for introducing water into the boiler. The steam or hot water leaves the boiler at the top through one of the openings 31.

The fuel is introduced under pressure and the gases of combustion after leaving the combustion chamber travel through the line 17 into the header l8 and pass thence downwardly through the conduit 23 and from thence through the lines 21 that are located above the angle 25, into the header 22 and from this header they pass through the fines 551 located below the angle 25 to the chamber 27 from which they are conducted to the outside of the building by means of a suitable pipe connected with 28. The water which is introduced at the bottom flows upwardly be tween the flues 21 and passes throu i the opening 32 into the upper boiler where it comes into contact with the hot surfaces of the combustion chamber a d the fines 11'. It is evident that as the flue gasespass downwardly from the combustion chamber to the discharge pipe 28, they will gradually decrease in temperature as they a c continually giving up their heat to the wet r with which they are surrounded. As the feed water is coldest where it enters the boile* its temperature will gradually increase as it flows upwardly and it moves upwar: it comes into contact with surfaces that are of increasingly greater temperatures, so that a substantizlly uniform temperature gradient 1s established between the water and the heated surfa 'es. W hen the boiler is in operation and the supply of feed water has been adjusted so as to correspond with the water evaporated, parts will soon reach a state in which the ten'i peratures at different parts of the boiler will remain substantially constant, and therefore there will be no sudden and drastic changes with corresponding expansions and contractions which up severe strains in the boiler.

The boiler constructed in the manner above described can be covered with heat insulating material so as to reduce the neat los es due to radiation, anc since the combusti n chamber and the lines are entirely surrounded by water, the transfer of heat from the fines to the water is very complete and therefore a high thermal efficiency is obtained. Due to the fact that the line gases pass downwardly and emerge from the boiler below the combustion chamber, the feed water can be admitted close to the point where the flue gases escape and therefore as the water increases in temperature and rises, it will continually come into contact with surf res that are hotter and in this manner a more eiiicient heat transfer is obtained than if the flue gases left the boiler near its top in the usual manner.

Having thus describet the invention what is claimed as new is:

1. A high pressure steam generator com prising two cylindrical members located above each other, means for connecting the interiors of the members, a cylindrical combustion chamber located in the upper member, the inner end of the comlmstion chamber terminating in a header, a header enclosing the front end of the combustion chamber, flues connecting the headers. a header near each end of the lower cylindrical member, a plurality of fines connecting the interiors of the last named headers, the front header in the lower cylindrical member having two compartments, means for connecting one of said compartments with the interior of the header enclosing the front end of the combustion chamber and means for connecting the other compartment with the atmosphere.

2. A high pressure steam generator comprising two cylindrical boilers, means for supporting them in superposed relation, mean? for connecting the interiors of the boilers, a cylindrical member extending inwardly through tne front end of the upper member and terminating adjacent the rear end thereof, said last named member forming a combustion chamber, a header carried by the inner end of the last named cylindrical member,aheader surrounding the combustion chamber near the front end thereof, a plurality of fines connecting the headers, the front end of the lower boiler having a recess, a cover for the recess, means for dividing the recess into two compartments, means for connecting one of the compartments with the interior of the header surrounding the front end of the combustion chamber, means for connecting the interior of the other compartment with the atmosphere, a header located in the lower boiler adjacent the rear end thereof and a plurality of flues connecting the interiors of the two compartments with the last named header.

3. A high pressure steam generator consisting of two cylindrical boilers located one above the other, means for supporting the boilers, means for connecting the interiors of the boilers, a cylindrical member of smaller diameter than the upper boiler extending inwardly from one end thereof, said member forming a combustion chamber, a header secured to the inner end of the combustion chamber, another header located near the front end of the combustion chamber, fines kill connecting the two headers, aplurality of fines extending inwardly from the front end of the lower boiler, a header in the rear end of the lower boiler, the flues having their rear ends connected with the last named header, a cover for the front end of the lower boiler, said cover when in place forming a chamber, means for dividing the chamber into two compartments, means for connecting one of said compartments with the header near the front end of the combustion chamber and means for connecting the other compartment with the atmosphere.

4. A high pressure steam generator comprising two boilers adjacent each other, means for connecting the interiors of the boilers, a hollow member forming a combustion chamber located in one of said boilers, the rear end of the combustion chamber terminating in a header, a header enclosing the front end of the combustion chamber, fines con necting the headers, a header near each end of the other boiler, a plurality of fines connecting the interior of the last named headers, the front header in the last named boiler having two compartments, means for connecting one of said compartments with the interior of the header enclosing the front end of the combustion chamber and means for connecting the other compartment with the atmosphere.

5. A high pressure steam generator comprising two boilers, means for interconnecting the interiors of the boilers at two spaced points, a hollow member extending inwardly through the front end of one of the boilers and terminating adjacent the rear end thereof, said last named member forming a combustion chamber, a header carried by the inner end of the combustion chamber, a header enclosing thecombustion chamber near its front end, a plurality of fiues connecting the headers, the front end of the other boiler having a recess, a cover for the recess, means for dividing the recess into two compartments, means for connecting one of the compartments with the interior of the header near the front end of the combustion chamber, means for connecting the interior of the other compartment with the'atmosphere, a header located in the second boiler adjacent the end opposite from the recess, and a plurality of flues connecting the interiors of the two compartments of the recess with the last named header.

6. A high pressure steam generator consisting of two boilers located adjacent each other, means for supporting the boilers, means for connecting the interiors of the boilers, a hollow member extending inwardly from the front end of one of the boilers, said member forming a combustion chamber, a header secured to the inner end of the hollow member and in communication with the coinbustion chamber, another header located near the front end of the combustion chamber, fines connecting the two headers, a plurality of fiues extending inwardly from the front end of the other boiler, a header in the rear end of the lastnamed boiler, the flues having their rear ends connected with the last named header, a cover for the front end of the last named boiler, said cover when in place forming a chamber, means for dividing the chamher into two compartments, means for connecting one of said compartments with the header near the front end of the combustion chamber and means for connecting the other compartment with the atmosphere.

In testimony whereof I afiix my signature.

WILLIAM A. KREAGER.

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