US2564683A - Distributor - Google Patents

Description

M. FRISCH DISTRIBUTOR Aug. 21, 1951 4 Sheets-Sheet 1 Filed Aug. 24, 1946 INVENTOR Em w A m. E B M M. FRISCH DISTRIBUTOR Aug. 21, 1951 4 Sheets-Sheet 2 Filed Aug. 24, 1946 INVENTOR MAET/A FIG/501% (5g BY W ATTORNEY DISTRIBUTOR Filed Aug. 24, 1946 4 Sheets-Sheet :5

M E E L LL 2 ,Y 1 507 29 30 7 24 30 22 T T f T A f 43 T 4/ 42 44 37 4 4745 f 38 o 1 o o LI 1 M ill 37 r 1 e I o o o a9 "44 39 48 T 49 r r 25 A T 7 f I 3 1 27 L7 4 23 BY 5 ATTORNEY Patented Aug. 21, 1951 DISTRIBUTOR Martin Frisch, New York, N. Y., assignor to Foster .Wheeler Corporation, New York, N. Y., a corporation of New York Application August 24, 1946, Serial No. 692,872

'13 Claims.

The present invention relates to distributors and more particularly to fiow distributors.

This invention provides a distributor for distributing a fluid stream, which stream flows within a conduit, substantially equally to a plurality of outlets for said stream the outlets being in communication with the conduit.

The invention will be disclosed as applied to the distribution of pulverized fuel flowing from a pulverizer in a stream of air to a plurality of burners so that each burner is supplied with an amount of fuel substantially equal to that supplied to the other burners.

The invention will be understood from the following description when considered in connection with the accompanying drawings in which:

Fig. l is a more or less diagrammatic view partly in elevation and partly in section of pulverized fuel burning apparatus embodying the present invention;

Fig. 2 is a view taken on the line 2-2 of Fig. 1;

Fig. 3 is an enlarged sectional view taken on the line 3-3 of Fig. 1;

Fig. 4 is a sectional view taken on the line 4- 3 of Fig. 3;

Fig. 5 is an enlarged horizontal sectional view taken on the line 55 of Fig. 1;

Fig. 6 is a diagrammatic view illustrating the operation of the distributor plates;

Fig. 7 is a vertical sectional view of another embodiment of the invention;

Fig. 8 is a transverse sectional View taken'on the line 1-1 of Fig. 7, and

Fig. 9 is a vertical sectional view taken on the line 99 of Fig. 7.

Like characters of reference refer to the same or similar parts throughout the several views.

The forms of the invention disclosed are arranged for use with the furnace of steam generating apparatus but it will be understood that the invention is not limited to this particular application.

Referring particularly to Figs. 1 and 2 of the drawings, the reference character I0 designates the setting of a steam generator having an upper drum H to which is connected a bank of steam generating tubes I2. The steam generator may be of any desired form. The pulverizing apparatus disclosed in these figures of the drawings reduces the fuel to a finely divided form which fuel is entrained in a current of air and delivered to burners in communication with the combustion chamber of the steam generator. The fuel, for example bituminous coal, is delivered to feed pipes l3 and is conducted throughthe fuel feed portions of a classifier M to a pulverizing mill [5 of any suitable type. As shown, the mill comprises a rotatable drum having pulverizing means such as a plurality of steel balls of varying diameters, not shown. Air, which is preferably preheated, is introduced into the mill through the air inlet l6 and sweeps entirely through the mill over the surface of the fuel being pulverized therein entraining reduced fuel and carrying it through the classifier i 4 wherein the fuel particles not sufiiciently pulverized are separated from the fuel and air stream and are returned to the mill I5. The air stream and entrained pulverized fuel then fiows through discharge pipe I? into an exhauster l8 which is driven by any suitable means such as an electric motor i9. A damper 2:) is hingedly mounted at 2G in the pipe I? and is movable in a counterclockwise direction on said hinge from the position shown in Fig. 2, in which position pipe I"! is fully opened and an opening 2| is completely closed, to a position in which the pipe I! is completely closed and the opening 2| is fully opened. Damper 20, which may be operated manually or automatically, is adapted to be retained in any position intermediate the two positions mentioned to thereby close or open the opening 2| in the pipe ii to varying degrees. Exhauster l8 delivers the fuel and air mixture into a distributing or hopper conduit 22 which has opposite end Walls 23 and 2t and opposite side walls Hand 26. As shown, the inlet end 21 of the hopper 22 is in communication with the outlet of the exhauster 18, while the outlet end 28 is covered by a plate 29 having a plurality of spaced outlets 30 therein. Delivery pipes 3i are connected into each of the outlets 30 at one end thereof, while the opposite end of the delivery pipes are in communication with a discharge nozzle 32. Each of the discharge nozzles 32 has a plurality of burner nozzles 33 at the discharge end thereof. The burner nozzles 33 discharge into the 001m bustion chamber of the vapor generator, air being supplied to said combustion chamber through air discharge ports 34 controlled by dampers 35 which are operated by damper control apparatus 36.

A distributor is positioned in the hopper 22 intermediate the inlet and outlet ends thereof so that the pulverized fuel in the stream flowing through the hopper is distributed substantially equally among the delivery pipes 3|. The distributor comprises a shaft 37 mounted to rotate in bearings 38 positioned.onbrackets 39 which brackets are secured to cover plates 40 removably fastened by means of bolts 4| to opposite end walls 23 and 24 of the hopper. Cover plates 4|! close an opening 42 in the walls 23 and 24 which are of such diameter that the distributor may be removed from the hopper, as will hereinafter be more fully described. Shaft 31, as shown in Figs. 1 to 6, extends substantially horizontally between end walls 23 and '24 of. the hopper and intermediate the sidewalls 25 and 2Sthereof. Electric motor M, which is removably secured to a bracket 43, rotates the shaft on its longitudinal axis. A plurality of spaced plates 44 which, as shown are in the form of an elliptical-shaped disc and are positioned on the shaft so a'sf'to rotate 'the'rewith, the shaft 31 extending through the central portion of the plates 44. Flow paths 45 having an inlet 46 and an outlet 41 are therebyformedbetween adjacent plates 44. Plates 44 are positioned on the shaft at anangle other than a right angle to the axis of rotation of said shaft so that when the plates are rotated by the shaft they will oscillate on an axis, indicated at A, Fig. 6, extending in a plane transversely of the axis of rotation of shaft 31 so that flow paths 45 between adjacent plates 44 will oscillate on axis A between points R and points StFig. 6) causing the stream of air and entrained fuel to enter the inlets 46 of said flow paths from-the inlet end 2'! of the hopper in the area between-said points R and S and to be discharged from the outlets 41 of said flow paths into the discharge 'end28 of the hopper in the area of oscillation'of said'flow paths during rotation of theshaft '3l. The plates 44 are of a width less than the distance between the side walls 25 and 26' andthe'spaces between the periphery of the platesand said walls are closed by guide blocks 48 and 19' which are secured to walls 25 and 26, respectively; the blocks being adapted to guide the stream of air and entrained fuel into passages 45 fromthe 'inlet end 21 of the hopper.

In operation, a mixture of primary air and pulverized fuel entrainedtherein is withdrawn from the'mill l and after passing through the classifier |4 is withdrawn through pipe H by exhauster l8. The stream of primary air and entrained fuel is discharged from the exhauster l8 into the inlet end 21 'of the hopper 22. The stream flows in the hopper from the inlet end 2'! into the inlets 45 to enter flow paths 45 between adjacent plates 44. "Since the plates 44 are rotated by shaft 31 about the horizontal axis of said shaft, the plates will oscillate on the transverse axis A, Fig. 6', in a plane extending transversely of the axis of therotation'of shaft 31 so that the flow paths 45 between adjacent plates will oscillate through areas between points R and S causing the stream of air with entrained pulverized fuel upon discharge from the outlet 41 of flow paths 45 to be'distri'buted throughout the outlet end 28 of the hopper substantially equally to the outlets 30. The stream of air with pulverized fuel entrained therein distributed to the various outlets 30 flows through the delivery pipes 3| to the discharge nozzle 32. thence into the burner nozzles 33 whence it is introduced into the combustion chamber of the vapor generator.

As shown, the stream of fuel and air flowing in the discharge nozzle 32 is distributed to the burner nozzles 33 by apparatus similar to that used in distributing the stream of fuel and air to the delivery pipes 3|. A substantially horizontally extending shaft 48 extends transversely of the discharge nozzle 32 and is mounted to rotate in bearings 49.

Shaft 48 is rotated by electric motor M. A plurality of spaced plates 50 similar to plates 44 are positioned on the shaft 48 so as to rotate therewith. Plates 50, like plates 44, are positioned on the shaft at an angle other than a right angle to the axis of rotation of the shaft 48 so that when the plates are rotated by rotation of the shaft the plates will oscillate in a manner similar to the oscillation of plates 44, as hereinbefore described. The flow paths 5| between plates 5|! are thereby oscillated causing the stream of fuel and air flowing from the delivery pipes 30 to the burner nozzles 33 to be distributed to the burner nozzles 33 in substantially the same manner that the. stream of air and entrained fuel is distributed to the outlets 30 by the flow paths 45 between plates 44.

Should it be desired, the distributor may be removed from the hopper 22. Such removal is accomplished by removing bolts 4| and plates 46 which cover openings 42thence removing bolts securing motor M to bracket 43'. By moving the motor and shaft 3'1 to the right of Fig. 3, the distributor is withdrawn from the hopper 22, plates 44 passing through opening 42.

In the embodiment of the invention shown in Figs. 7 to 9, a single elliptical-shaped distributor disc 52 is mounted on a vertically extendin shaft 53 to rotate therewith on the longitudinal axis of said shaft. The disc 52 is positioned on the shaft 53 at an angle other than a right angle to the axis of rotation of the shaft. The shaft 53 is mounted in a distributor casing 54 adapted to be positioned on the discharge end of the exhauster IS. The outlet end 55 of the casing 54 is enclosed by a cap 56 having a plurality of outlets 51 therein which outlets are positioned adjacent the periphery of the cap. Shaft 53 extends through cap 55 in the central portion thereof and is connected to electric motor 58 mounted on brackets 59 attached to cap 55. The opposite end of shaft 53 is mounted in a bearin support 60 within the casing 54.

The inlet end 6| of the casing 54 is in the form of a truncated cone with the base thereof toward the exhauster l8. Above the inlet end 6| is a cylindrical throat portion 62 which is in communication with an outwardly flared or in" verted truncated one section 63 which is a part of the cylindrically shaped outlet end 54 of the casing. The disc 52 is so positioned on the shaft 53 that substantially half the disc is Within throat portion 62 and the other half adjacent the outwardly flared portion 63.

In operation, as the shaft 53 is rotated by the motor 58, the disc 52 rotates with said shaft on the longitudinal axis thereof. Rotation of the disc 52 on the longitudinal axis of the shaft causes an outlet opening to be formed around substantially of the throat 62 so that air and entrained fuel may pass from the inlet end SI of the casing 54 through substantially 180 of the throat 62 thence into substantially 180 of the outlet portion 64 of the casing. Continued rotation through one revolution of the disc 52 causes the disc to move from the position shown in full lines in Fig. '7 to the position shown in dot and dash lines so that a stream of air and entrained fuel will pass from the inlet portion 6| of the casing 54 through the throat 62 into the other half or 180 of the outlet por-- tion '34 of casing 54. Air and fuel, when the disc is in such position, will be prevented from entering the first-mentionedlSO" of the outlet portion 64 due to the close proximity of thedisc to 180 of the inside diameter of throat 62. It will be understood that the disc 52 is rotated at a relatively high speed so that the distribution of air and entrained fuel from one half of the outlet portion of casing 54 to the other half of said outlet portion occurs with great rapidity so that fuel and air are distributed substantially equally among outlets 57. As shown, outlets 51 are controlled by dampers 65.

While the invention has been disclosed as applied to the distribution of pulverized fuel flowing from a pulverizer in a stream of air to a plurality of burners for a vapor generator, it will be understood that this invention is not to be limited to such apparatus but is capable of use as a distributor for distributing a fluid stream which flows within a conduit substantially equally to a plurality of outlets for said conduit.

It will be understood that the forms of the invention disclosed are preferred forms and that changes may be made in the form, location and relative arrangement of the several parts of the apparatus disclosed Without departing from the principles of the invention. Accordingly, the invention is not to be limited excepting by the scope of the appended claims.

What is claimed is: Y

1. Apparatus for distributing a fluid stream having solid particles entrained therein, said apparatus comprising a conduit having an inlet end and an outlet end with an inlet chamber at said inlet end, an outlet chamber at the outlet end and an intermediate passage connecting said chambers, the outlet end having a plurality of outlet openings in communication with the outlet chamber, a distributor in the intermediate passage, the distributor comprising at least one plate member mounted to rotate on a fixed axis and extending diagonally of said axis and on opposite sides thereof, said distributor being disposed in the intermediate passage to extend diagonally thereof and in the path of said fluid stream flowing from the inlet chamber to the outlet chamber, and means for continuously rotating said at least one plate member on said fixed axis.

2. Apparatus for distributing a fluid stream having solid particles entrained therein, said apparatus comprising a conduit having an inlet end and an outlet end with an inlet chamber at said inlet end, an outlet chamber at the outlet end and an intermediate passage connecting said chambers, the outlet end having a plurality of outlet openings in communication with the outlet chamber, a distributor in the intermediate passage, the distributor comprising at least one flat plate member mounted to rotate on a fixed axis and extending diagonally of said axis and on opposite sides thereof, said distributor being disposed in the intermediate passage to extend diagonally thereof and in the path of said fluid stream flowing from the inlet chamber to the outletchamber, and means for continuously rotating said at least one flat plate member on said fixed axis.

3. Apparatus for distributing a fluid stream with pulverized fuel entrained therein comprising a conduit having an inlet end and an outlet end with an inlet chamber at said inlet end, an outlet chamber at the outlet end and an intermediate passage connecting said chambers, the outlet end having a plurality of outlet openings in communication with the outlet chamber, adistributor in the intermediate passage, the distributor comprising at least one disc mounted at the center thereof to rotate on a fixed axis and extending diagonally of said axis and on opposite sides thereof, said distributor being disposed in the inter mediate passage to extend diagonally thereof and in the path of said fluid stream flowing from the inlet chamber to the outlet chamber, and means for continuously rotating said at least one disc on said fixed axis.

4. Apparatus for distributing a fluid stream comprising a conduit having an inlet end and an outlet end with an inlet chamber at said inlet end, an outlet chamber at the outlet end and an intermediate passage connecting said chambers, the outlet end having a plurality of outlet openings in communication with the outlet chamber, a distributor in the intermediate passage, the distributor comprising a plurality of plate members mounted to rotate on a fixed axis extending transversely of the intermediate passage, the plate members being spaced from one another longitudinally of said axis from one side to the other of the intermediate passage and extending diagonally of said axis and on opposite sides thereof in the path of a fluid stream flowing from the inlet chamber to the outlet chamber, and means for rotating said plate members on said fixed axis.

5. Apparatus for distributing a fluid stream comprising a substantially vertically extending conduit having an inlet end and an outlet end with an inlet chamber at said inlet end, an out-- let chamber at the outlet end and an intermediate passage connecting said chambers, the outlet end having a plurality of outlet openings in communication with the outlet chamber, a distributor in the intermediate passage, the distribu-- tor comprising a plurality of plate members; mounted to rotate on a flxed axis extending horizontally and transversely of the intermediate passage, the plate members being spaced in parallel relationship to one another longitudinally of said axis from one side to the other of the intermediand on opposite sides thereof in the path of a fluid stream flowing from the inlet chamber to the outlet chamber, and means for simultaneously rotating all of said plate members on said fixed axis.

6. Apparatus for distributing an air stream having pulverized fuel entrained therein comprising a substantially vertically extending conduit having an inlet end and an outlet end with an inlet chamber at said inlet end, an outlet chamber at the outlet end and an intermediate passage connecting said chambers, the outlet end havin a plurality of outlet openings in communication with the outlet chamber, a distributor in the intermediate passage, the distributor comprising a shaft rotatably mounted in said intermediate passage and extending transversely thereof in a horizontal plane, a plurality of discs mounted on the shaft to rotate therewith, said shaft passing through the centers of said discs, the discs extending diagonally of the longitudinal axis of the shaft and spaced in parallel relationship to one another longitudinally of the shaft from one side to the other of the intermediate passage, and means for rotating said shaft.

- 7. Apparatus for distributing an air stream having pulverized fuel entrained therein comprising a substantially vertically extending conduit having an inlet end and an outlet end with an inlet chamber at said inlet end, an outlet chamber at the outlet end and an intermediate passage connecting said chambers, the outlet end having stereos a 'plurality of outlet openings in communication with the outlet chamber, a distributor'in the intermediate passage, the distributor comprising a shaft removably and rotatably mounted in said intermediate passage and extending transversely thereof in a horizontal plane, a plurality of discs mounted on the shaft to rotate therewith, said shaft passing through the centers of said discs, the discs extending diagonally of the longitudinal axis. of the shaft and spaced in parallel relationshipto one another longitudinally of the shaft from one side to the other of the intermediate passage, and meansfor rotating said shaft.

8. Apparatus for distributing a fluid stream comprising a substantially vertically extending conduit having an inlet end and an outlet end with an inlet chamber at saidinlet end, an out letchamber at the outlet end and an intermediate. passage connecting said chambers, the-outlet end having a plurality of outlet openings in communication with the outlet chamber, a dis-- tributor in the intermediate passage, the distributor comprising a rotatably' mounted shaft extending vertically through the intermediate passage, a single plate in the intermediate passage mounted on said shaft to rotate therewith, said plate extending diagonally of the longitudinal axisiof the shaft on opposite sides thereof and: diagonally of said intermediate passage, and meansfor rotating said shaft.

9.. Apparatus for distributing a fluid stream comprising a conduitwith an inlet end and an outletend, the outlet end having a plurality of spaced outlet openings. in communication with said conduit, a distributor positioned in said con-- duit adjacentv to and: in spaced-relationship with said outlet end and said: openings suchdistance asztdprovide an outlet chamber between-saidoutletend. and the distributor, the distributor' also being so positioned in: the conduit in spaced relationship with. the inlet end. such distanceas toprovide an inlet chamber betweensa'id inlet end andzthe distributor,.the distributor comprisingat.

least one plate member mounted to rotateona fixed. axis and extending diagonally of: said axis and on opposite sides thereof,saiddistributor-being disposed in theiconduit. to extenddiagonally' of the longitudinal axis thereof and in the path.

of: saidfluid stream flowingfrom; the: inletchambar to the outlet. chamber of said conduit, and

means for continuously rotating-said at least one plate member on said fixedaxis.

ldhpparatus for distributing a. fluid. stream comprising a eonduitwith an inlet end and an outlet end, the outlet endhaving, a& plurality of. spaced outlet openings in communicationwith: saidconduit, a distributor positioned in said conduit adjacent to and in spacedrelationship with said outlet end and said openings". such. distance as to provide an outlet chamberJbetWeensaid'outlet end and the distributor, the. distributoralso being so positioned in the conduit in spacedzrelationship with the inlet end such distance as to provide an inlet chamber betweensaidJ-inlet end and the distributor, the-distributor comprisingat least one disc mounted at 'thecenter: thereof to rotate on a fixed axis and extending: diagonally of said axis and on opposite sides. thcreof,,said

distributor being disposed-in the conduit to extend: diagonally of the longitudinal. axis thereof and in the path of said fluid stream flowing from the inlet chamber to the-outlet chamber of: said conduit, and means for continuously rotating; said at leastonedisc' on said fixed. axis.

11. Apparatus for distributing a fluid stream comprising a conduit with an inlet end and an outlet end, the outlet end having a plurality of spaced outlet openings in communication with said conduit, a distributor adjacent to and in spaced relationship with said outlet end and said openings, the distributor comprising a plurality of plate members mounted to rotate on a fixed axis extending transversely of the longitudinal axis of the conduit, the plate members being spaced from one another longitudinally of said fixed axis from one side to the other of the conduit and extending diagonally of said fixed axis and on opposite sides thereof in the path of a fluid stream with solid particles entrained therein flowing from the inlet end to the outlet end ofsaid conduit, and means for rotating said plate members on said fixed axis.

12. Apparatus for distributing a fluid stream comprising a vertically extending conduit with an inlet end and an outlet end, the outlet end having a pluraltiy of spaced outlet openings in communication with said conduit, a distributor positioned in said conduit adjacent to and in spaced relationship with said outlet end and said openings such distance as to provide an outlet chamber between said outlet end and the distributor, the distributor also being so positioned in the conduit in spaced relationship with the inlet end such distance as to provide an inlet chamberv between said inlet end and the distributor, the distributor comprising a rotatably mounted shaft extending vertically in the conduit, a single plate in the conduit mounted on said shaft to rotate therewith, said plate extending diagonally of the longitudinal axis of the shaft on opposite sicles thereof and diagonally of saidconduit in the path of said fluid stream flowing from the inlet chamber to the outlet chamber of said conduit, and means for rotating said shaft.

13. Apparatus for distributing a stream of air having pulverized fuelentrained therein, said-apparatus comprising a substantially vertically extending conduit having an inlet end and an outlet end with an inlet chamber at said inlet end, an. outlet chamber at the outlet end and an intermediate passage connecting said chambers, the outlet end having a plurality of outlet openings in communication with the outlet chamber, a distributor. in the intermediate passage, the distributor comprising a rotatably mounted shaft extending vertically through the intermediate passagaa single plate in the intermediate passage mounted on said shaft to rotate therewith, said plate extendingdiagonally ofthe longitudinal axis of the'shafton opposite sides thereof and diagonally of said conduit throughout substantiallythe entire inside diameter thereof, and means for rotating said shaft.

MARTIN FRISCH.

- REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date R'e.=21,878 Frisch Aug. 19, 1941 898,818 'Aiken' Sept. 15, I908 1,641,470 Bell Sept. 6, 1927 1,8313066 Gleason Nov. 10, 1931 2,400,703: Messinger May 21, 1946

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