US1786182A - Soot blower - Google Patents

Description

1930- c. WHITON. JR.I. ETAL 1,786,182

SOOT BLOWER Filed July 30, 1926 fps wane Zoo/SC C Hard/g 3513 G-Howwq LOUIS C. WHI'I'ON, JR., AND JE]? 'C." HARDIGG, OF NEW YORK, N. Y ASSIGNORS TO- Patented Dec. 23, 1930 UNITED STATES PATENT OFFICE FEAT-DANIEL CORPORATION, OF NEW YORK, N, Y., A CORPORATION OF NEW YORK SOOT BLOWER- Application filed July so;

This invention relates to cleaning tools which are adapted to blow away accumulations of soot, tar, pitch or other foreign matter such as chemicals, ash, dust and so forth, which accumulates in the cells or passages of various kinds of apparatus through which gases are passed. While not limited thereto, the invention is peculiarly well adapted for use in connection with heat exchangers or air preheaters. Air heaters or heat exchangers and similar apparatus frequently comprise a vast number of closely spaced steel plates between which streams of gas or air are passed. In certain known types of apparatus, plates approximately five feet high by ten feet long are placed side by side in parallel planes about one inch apart. The gas or other heating fluid passes through tne cells thus formed and in time the plates become covered with soot or other foreign matter. It is desirable to periodically clean the plates and this can'be effectively done by directing jets of steam, air or other fluid through the space between the plates. It is important, however, not to have the jet of steam or air impinge against the plates because injury to the plate follows when the jet forcibly strikes the plate. Such a jet of fluid striking the plate causes a reaction which quickly destroys the plate. For this reason, it is imperative that the steam or other fluid jets be directed very accurately to the center of the space between adjacent plates. This presents a practical difliculty, however, because the plates of these preheaters are not always accurately spaced. Certain tolerances are allowed in their construction, hence, if a blower pipe is merely drilled with equally spaced holes, when the same is put to use, it will be found that the holes will not line up with the centers of the spacers of the cells of the preheater. To overcome this difficulty we have devised the novel soot blower hereinafter more fully described which is provided with nozzles having outlet ports which can be accurately adjusted so as to center them with the spaces or cells to be cleaned.

The invention will be clearly apparent from the following description when read in 1 926. seen nofieas'oz,

connection with the accompanying drawings and the features of novelty will be pointed out with particularity in the appended claims.

In the drawings l v i Fig. 1 is a conventional representation of a known type of heat exchanger showing our improved soot blower combined therewith;

Fig. 2 is a plan view illustrating one form of the soot blower embodying our invention;

Fig. 3 is a sectional view on line 3 -3 of Fig. 2; r j

Fig. 4 is a sectional perspective view showing an alternative embodiment of the invention;

Fig. 5 is a detail View showing a slight modification of the construction shown in Fig. 4.

Fig. 6 is a detail showing a further alter-' native construction.

In the drawings 10 represents a conventional preheater or heat exchanger which is made up of a multiplicity of spaced plates 12 defining a great 0 number of air cells 14. Mounted in juxtaposition to'the cells is our improved soot blower indicated as a whole by numeral 16. As best shown in Figs. 2 and 3 the blower comprises a'pipe or conduit 18 which is provided with a plurality of openings 20 which may be screw threaded as shown. Fitted in the openings 20 are nozzles 22 each having an outlet port 2d which is eccentric to the opening 20. The nozzles shown in Figs. 2 and 3 are of polygonal form in plan indicated at 26 to permit of coaction with a suitable wrench. The spacing between the centers 0 of the openings in the pipe is approximately equal to the spacings of the cells 14 in the heat exchanger or preheater. The spacing of the openings in the pipe is preferably uniform though it isto'be understood that'where the space of the cells vary, the openings in the pipe 18 may be varied to suit. However it is clear that due to tolerances allower in setting up the-heat exchanger and also due to inaccuracies, for exa1nple, in erroneously prick-punching the pipe before drilling discrepancies will creep in so that the drilled openings in which the nozzles are journalled will not accurately align with centers of the cells in the heater. To correct this error so as to bring the outlet ports of the nozzles into accurate position with respect to the center of the cells 14 of the heater, it is merely necessary to turn the nozzles one way or the other so to secure ideal adjustment.

The nozzles may be of differ-em form from that shown in Figs. 2 and 3 the point being that the outlet port thereof is eccentric-to the longitudinal axis of the journal opening formed in the pipe 18. For example an alternative construction is shown in Fig. 4 wherein the nozzle 22 is in the form of a small pipe section having a portion 23 threaded into the opening 20 and having an outlet portion 25 offsettherefrom so that the outlet port 2 1- is eccentric to the ournal portion of the nozzle.

In the modification shown in Fig. 5, the nozzle 22 is quite similar to that shown in Fig. 4, it being formed with an obliquely inclined portion connected with the journalled portion 27 and with the outlet portion 29. In the form last illustrated the nozzle is not screw threaded into the pipe but is journalled in a drilled hole. It is to be understood that in the other figures the nozzles may be similarly secured. After the adjustment is made, the nozzles can, be located in place in various manners regardless of whether or not the same are screw threaded to the pipe. For eX- ample, a lock nut may be employed as shown at 21 in Fig. 4. Or after the desired adjustment is secured, the nozzles may be keyed, spot welded or by staking the nozzles to the pipe by means of a priclnpunch or other suitable tool.

Fig. 6 illustrates a modified construction in which the rectangular block 30 is secured to the pipe 18 and screwed into an opening 32 in the block is a nozzle 34 having a port 36 therein which is eccentric to the opening 32 formed in the block.

The blower pipe 18 if desired may be fixedly secured in juxtaposition to the heater or as shown in Fig. 1 may be mounted in bearings 19 arranged to permit the pipe to be turned on its longitudinal axis so as to turn the nozzles away from the position shown. Alternatively. the blower pipe 18 may be mounted to swing radially on an axis at an angle to the longitudinal axis of the pipe.

lVhile we have described quite precisely the specific details of certain embodiments of the invention illustrated, it is not to be construed that we are limited thereto since various modifications may be made without departure from the invention as defined in the appended claims.

hat we claim is 1. The combination with a heat exchanger having a multiplicity of spaced cells, of a blower comprising a pipe having a number of substantially circular openings therein in approximate alignment with said cells, and adjustable nozzles journalled in said openings and having outlet ports eccentric thereto so that said ports can be accurately aligned with said cells by partially rotating the nozzles relatively to said pipe.

2. A blower of the class described comprising a pipe having a transversely ext-ending circular nozzle adjustably seated in said pipe, said nozzle consisting of a member having a single port of uniform sectional area through out its length, said port terminating in a single outlet orifice eccentric to the part of the nozzle seated in said pipe.

In witness whereof, we have hereunto signed our names.

LOUIS C. VVHITON, JR. JEP C. HARDIGG.

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