US1707803A - Method of soot removal - Google Patents

Description

April 2, 1929. s. F. FENNO 1,707,803

IETHOD OF SOOT REMOVAL Filed Aug. 4, 1926 2 oooooooooooooooo 3 006600000 000000 00 4 ooooooooooooooo oppooooooooooooooo q ooooooooooooooooo 0 O QOOOO0OOOOOOOOOO oooooooooooooooo W Gear-ye Fl e 17120 Patented Apr. 2, 1929.

UNITED STATES PATENT -m=|=i1-E.

GEORGE F. FENNO, OF SWARTHMORE, PENNSYLVANIA.

METHOD OF 800T REMOVAL.

Application filed August 4, 1926. Serial No. 127,165.

steam on the surfaces to be cleaned. In the case of boilers particularly, this requires a large number of pipes located in the path of the flue gases where they are subject to rapld deterioration due to the corrosive action of the gases and the high heat to which they are subjected. Furthermore, these distributing pipes have to be connected up with an elaborate system of outside piping for conveying the steam to them. The installation of this piping is becoming more and more difiicult due to the large size of modern boilers and to the presence of other apparatus on the boiler walls. Such soot blowers are further limited in their use by the steam pressure available, which frequently necessitates a large number of pipes for supplying the steam jets, and in a case of low. pressure boilers often there is not enough steam pressure available to adequately'remove the soot.

My invention practically eliminates pipes inside of the apparatus to be cleaned and also greatly reduces the outside piping complication and furthermore makes the operation of the soot blower independent of the pressure available.

Briefly, my invention makes use of the fact that large volumes of gases, at high pressure 40 if desired, can be generated by the explosion of suitable chemicals; According to my invention the high pressure is converted into velocity by means of correctly designed nozzles and these nozzles direct the high velocity gases across the heating surface to remove the soot, and furthermore are useful for diverting the normal flow of the flue gases into new channels forming vertexes and eddies which also assist in removal of thesoot. In this description the word explosion is used in i a very general sense and may be either a quick combination of the chemicals giving a sharp pufi', or a slower burning or chemical combination of the chemicals giving a more sustained or prolonged generation of larger volumes of gases; however, the explosion is controlled in respect to character, extent of vioplace of application;

A typical arrangement of my apparatus suitable for the practice of my invention is shown in the accompanvim drawings formlence, time of occurrence, and method and ing part hereof and in whi h Figure 1 is a typical cross section of a water tube boiler showing the arrangement of the water tubes, drums and the like. V

Figure 2 is a longitudinal elevation of the same boiler; and

Figures 3 and 4 are top or plan views of nozzles.

In the drawings pipes 1', 2, 3, 4, 5, and 6 are inserted through the boiler wall and terminate in suitable nozzles 13. These nozzles may be of the single type as shown in Figure 3 for projecting a single jet of the high velocity gases or they may be fan shaped as shown in Figure 4 for distributing the cleaning fluid over a Wider area. Pipesl, 2, 3, 4, 5, and 6 are connected to headers 10, 11 and 12.

In the practice of the invention by means of the described apparatus the header 10, for instance, is filled with an explosive mixture which can be detonated or fired producing a large volume of gas which is distribut 1 ed by the pipes l, 2, 3, 4, 5, and 6 to the nozzles and projected across the surface to be cleaned.

From the above description my method for removing soot will be understood; however, it should be understood that any arrangement of the projecting nozzles and exploding chamber can be used in the practice of the invention to meet the requirements of any particular case. It is immaterial the'number of jets that are used, their arrangement, or the method of connecting them to the header. In some applications the gases re- I sulting from the explosion may be simply mixed with the flue gases, the resulting increase in volume causing a sufficient increase 100 in velocity to remove the soot.

Examples of materials are suitable forms of explosive powder, suitable explosive admixtures of air and gas, and suitable chemicals'adapted to react with the evolution of gas.

It will be obvious to those skilled in the art that modifications may be. made in details of procedure and in matters of mere form without departing from the spirit of the invention Whichis not limited to such matters deflect the normal flow of flue gases producing. eddies and vortexes for the removal of soot.

' 2. The method of soot removal from the heating surfaces" of a chamber, which consists in generating a large volume of gas by firing an explosive mixture, and admixing 15 the same with the flue gas to increase the normal velocity of the gases passing through the a chamber.

8; The method of soot removal from heating surfaces which consists in producing 2 gaseous jets by the explosion of suitable materials, and applying the kinetic energy of the jets to'clean said surfaces by impinging said jets on said surfaces.

' GEo FENNO.

Images