US2412856A - Steam generator - Google Patents

Description

17, 1946. .1. P. BADENHAUSEN I 2,412,856

STEAM GENERATOR Filed March 50, 1945 2 Sheets-Sheet 1 1 INVENTOR Jar/iv PH/u/Ps Bfloewunuszlv a rwmfi firm/2M7 Dec. 17, 1946. J. P. BADENHAUSEN ,8

STEAM GENERATOR Filed March 30, 1945,

2 Sheets-Sheet 2 I a 229mm INVENTOR' Jo HN PHILLIPS BAPENHA U'S-EN I B v 7mm; ATTORNEY i The steam generator as Patented Dec. 17, 1946 STEAM GENERATOR John Phillips Badenhausen,

signor of one-half to Philadelphia, Pa.

Philadelphia, Pa., as-

Bayard Badenhausen,

Application March 30, 1945, Serial No. 585,619 Claims. (01. 122-255) This invention relates to steam generators and more particularly to steam generators adapted for burning pulverized anthracite coal, anthracite culm and other fuels. It is the principal object of the present invention to provide a steam generator having improved means for introducing air for supporting combustion.

It is a further object of the present invention to provide improved apparatus for introducing air for the combustion of fuel for steam generation.

It is a further object' of the present invention to provide an improved arch construction with provisions for introducing air therethrough for supporting combustion.

It is a further object of the present invention to provide apparatus for burning fuel for steam generation which will be adequately protected from the high temperature of the combustion of the fuel.

Other objects of the from the specification and claims.

The nature and characteristic features of the invention will be more readily understood from the following description, taken in connection with the accompanying drawings forming part hereof, in which:

Figure 1 is a vertical transverse sectional View of a steam generator embodying the present invention taken approximately 011 the line I-I of Fig. 2;

Fig. 2 is a vertical central sectional view taken approximately on the line 2--2 of Fig. 1;

Fig. 3 is an enlarged fragmentary view partly in plan and partly in horizontal section illustrating a preferred arch construction in accordance with the present invention; and

Fig. 4 is an enlarged fragmentary sectional view taken approximately on the line 4-4 of Fig. 3.

It should of course be understood that the description and drawings herein are illustrative merely, and that various modifications and changes may be made in the structure. disclosed without departing from the spirit of the invention.

Referring more particularly to the drawings, a steam generator of a particular type is illustrated for purposes of explanation of the invention.

shown includes a vertical front wall Ill, a vertical rear wall I I, and vertical side walls I2 and I3. An upper horizontal steam and water drum I 4 is provided extending rearwardly from the front wall I0 with its longitudinal axis parallel to the side walls I2 and I3. At the lower invention will be apparent shaped block elements 3| part of the side wall I2 and I3, lower water headers I5 and I6 are provided extending from front to rear with their longitudinal axes parallel to the axis of the steam and water drum l4. Between the front wall I0 and the rear wall II an upwardly extending vertical wall or baffle I1 is provided preferably extending from the side wall I2 to the side wall I3. The upper ends of the side walls I2 and I3 are preferably connected to top wall sections I8 and I9 and a central top wall section 20, covering the drum I4, extends between the top wall sections I8 and I9.

The front wall I0 is preferably provided with a fuelinlet opening 2| for the introduction of fuel in any desired manner. The space to the rear of the front wall I 0 in front of the wall or baflle l1 and between the side walls I2 and I3 preferably constitutes a combustion chamber. A grate 22, extending rearwardly from the front wall ID to the wall or baflle I7, may be provided for retaining a bed of burning fuel at the lower part of the combustion chamber. The grate 22 preferably serves as a closed hearth and the space below the grate 22 is preferably closed and not provided with any air supply.

The side walls I2 and I3 of the combustion chamber are preferably lined with banks of steam generating riser tubes 23 which extend upwardly along the interior of the side walls I2 and I3 from the lower water headers I5 and I6 to the steam and water drum I 4.

A bank of spaced steam generating riser tubes 24 is provided, the tubes 24 extending upwardly from the headers I5 along the interior of the side wall I2 and then substantially horizontally and transversely across to the other side wall I3 then upwardly along the interior of the wall l3 and beneath the top wall section I9 to the steam and water drum I 4.

A bank of spaced steam generating riser tubes 25 is provided, the tubes 25 extending upwardly from the header I6 along the interior of the side wall I3 and then substantially horizontally and transversely across to the other side wall I2 then upwardly along the interior of the wall I2 and beneath a top wall section I8 to the steam and water drum I4.

The substantially horizontal portions of the tubes 24 and 25 serve as supports for an arch 30 illustrated in more detail in Figs. 3 and 4. The arch 30 preferably consists of a plurality of I- of refractory material.

- The elements 3| preferably each have a horizontal top flange or section 32, with an upper exposed .ments M and from ,Wa-rdly through the openings lower wall portions also have transverse edge por tions 39 for engagement with corresponding edge portions 39 of adjoining block elements 3!.

The block elements 3| are-provided'with open ings 40 for the downward delivery ofair-from interior air compartments 4:. The number and sizes of the openings 40 maybevariedin accordance With the air requirements for the burning of the particular fuel employed, the openings/'48 being provided in sufiicient number and of suffi'cient. size toprovide all theair required .for the combustion of the fuel. on the grate 22. Air is supplied. to the compartmentstl by aid. ducts 52.

It. will. be noted that the block elements M, by reason or their. shape, may readily be positioned: on the horizontal tube portions of the banks of: tubes 241 and 25 with the edge portions 31-. restingon the horizontal portions of the tubes (and 25, and with the edge portions 3% and 39 respectively in engagement, to provide the arch construction. in accordance with, the present. invention;

The mode of operation clear from the foregoing will, it is thought,. be but it may benoted that fuel. is supplied through the fuel opening .21. and: delivered to, and distributed on the grate ZZsin any desired manner. Air is supplied for combustionthrough the ducts 42 to the compartthe compartments 4i downii); The air for combustion is thus directed onto the fuel on the grate-22. The fuel-burns on the grate 22 and the burning continues asfthe hot gases ofcombustion pass around the front of the arch'fiiiand across the top faces 33 thereof. leased by the combustion is effective for generatingsteam in the banks of wall tubes 23 and i the tubes of the banks of tubes 24: and 2.5. The steam rises-in the tubes 23, E i and 25' and is delivered by these tubes to the steam and water drum M. The airmoving in the compartments 4| prevents the overheating of thearchBfi-at the lower wall portions 35- thereof and prevents the overheating'of the top sections 32"thereof' as the hot gaseso-f combustion pass thereover.

The horizontal sections of the tubes 24 and 7 2'5, inaddition to their function of generating steam, also support thearch 3!! and aid in coolingthe top sections 32 of the arch 36, thereby preventing the same from becoming overheated.

I- claim:

1'. In a steam generator, a steam and water compartment, a combustion chamber below-said compartment having side walls and a bottom wallproviding a hearth, steam, generating-tubes:

connected to said steam and water compartment and having substantially horizontal portions, and arch blocks carried on said portions of saidtubes,

. said arch blocks being I.-shaped and having upperportions and lower portions, the spacesbel tween said upper and lower portions; of said blockscomprising air delivery compartments; and said lower portions of said blocks being provided with openings for the discharge of air to- The heat recompartment, a combustion chamber below said compartment having side walls and a closed bottom wall providing a hearth, steam generating tubes connected to said steam and water COIIl-f partment and. having substantially horizontal portions and arch blocks carried on said portions of said tubes, said arch block being I- shapedand having upper portions in engage- -merit with said portions of said tubes and lower portions, the: spaces between said upper and lower 'portionsot said blocks comprising air delivery-compartments, and said lower portions of I said, blocks-being provided with openings in communication with said air compartments for the discharge of air towardsaid hearth for the combustion of fuel thereon. $3. In a steam'generator, a.v steam andwater compartment, a combustion chamber. having: side walls anda bottom'wall providing", a hearth, steam generating tubes connected to said steam and: water compartment and having substantially horizontal portions, and arch blocks carried on the horizontal portions of said tubes; said arch blocks. being I-shaped andhaving upperv portions; lower portions and Webs extending between said portion of said blocks, the spaces between said upper and lower portions of said blocks. and. said webs comprising air delivery compartments, ,and said' lower portions of said blockslbeing provided with openings for the discharge of air toward said hearth. for the combustion of fuel thereon.

4;.In a steam generator, a steam and water compartment, a combustion chamber below said compartment having side walls and a closed bottom wall providing a hearth, steam generating tubes connected to said steam' and water compartment and having substantially horizontal portions, and, arch blocks carried onv the. horizontal portions of said tubes, said arch blocks being I-shaped and having upper portions in "engagement with said portions of said tubes, lower portions, and webs extending between said portions of saidblocks, the spaces between said upper and lower portions of said blocks and said flanges comprising air delivery compartments, and said lower portions of said blocks being pro.- videdwi'th openings for the discharge. of air toward said hearth for the. combustion of fuel thereon.

5.. In a: steam generator, a steam and water Y delivery compartments, the lower portions of said arch blocks beingv in edgewise engagement and provided with openings at the edges for the discharge of air toward said hearthfor the combustion of fuel thereon.

V JOHN PHILLIPS BADENHAUSEN.:,.

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