US1310917A - Classifier - Google Patents

Description

E. F. McCOOL.

CLASSIFIER.

'APPLlCATlON FILED OCT. 9. 1912.

1,3 1 0,9 1 7 Patented July 22, 1915).

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CLASSIFIER.

APPLICATION FILED OCT. 9,1917. 1,3 10,9]. 7.- Patented July 22, 1919.

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CLASSIFIER.

Specification of Letters Patent. Patnted July 2 2, 1919.

Application filed October 9, 1917. Serial No. 195,512.

Victor, county of Teller, and State of 0010- rado, have invented certain new and useful Improvements in Classifiers; and I do declare the following to be a full, clear, and exact description of the invention, such aS will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to. the characters of reference marked thereon, which form a part of this specification.

My invention relates to improvements in classifying means, my object being to provide a device of this characterwhich shall prevent any pulverulent material beyond a predetermined size, from passing from the pulverizer through a conduit in which the classifier is interposed.

While the invention is capable of employment in many diflerent relations, the coning coal and passing the same from the pulverizer through a conduit to the fur nace or. furnaces or fire boxes in which fuel is to be consumed.

In constructions of this kind the pulverulent coal is delivered to the fire box through the medium of air pressure preferably by the use of a blower surrounding grindin disks through the instrumentallty of whic the coal is pulverized, the blower consisting of fan blades located in a chamber surrounding the pulverizing chamber or that where the inding disks are located.

-My improvef classifier consists of a casing arranged in suitable proxlmity to the blower of the pulverizer and in such relation thereto that the chamber of the casing is inclined to such a degree that the coarser particles which are 1'6]G0l38d by the classifier, may 'return by gravity and by way of a separate by-pass, to the pulverizer for retreatment. In the chamber of the classifier casing and directly in front of the discharge nozzle leading from the blower is an adjustable bafltle plate, while above this bailie entering the chamber of the casing, provid 1 ing it is'sufliciently fine to rise into the path of the upper compartment, in which event the air current produced by the blower will carry this finely pulverized material through the conduit into the furnace or fire box where it is to be used. The baflie within I the classifying chamber may be located more or less in the rearof the inlet extremlty of the upper compartment through whlch the finely pulverized comminuted 'material must pass. The finer the material must be 'before it passes to the furnace, the

greater will be the distance between the baflie plate andthe inlet extremity of the pulverulent fuel compartment of the classifier, since the farther the baflle-plate. is located forward of the inlet extremity of the pulverulent compartment of the classifier, the more difficult will it be for the pulverized materlal to escape from the chamber of the classifier, since, after this material is discharged upon the baflle plate, there is a re'- bound or recoil action, and only the very fine material or that in the form of dust will riseand get into alinement with the upper compartment of the classifying chamber; while the coarser particles will fall to the bottom of the inclined chamber and slide downwardly into and through a special conduit or bypass and return to the pulverizer, as heretofore stated.

Having briefly outlined the invention, I

reference being drawing, 1n w Figure 1' is an elevation of my improved classifier shown in connection with a conduit partially in section, through which the pulverulent material may pass from the pulverizer which is shown in end elevation, to the fire box of a furnace whose front wall is shown in vertical section.

Fig. 2 is a sectional view of. the classifier, shown in detail and on a somewhat larger scale.

Fig. 3 is a top plan view illustrating my improvement in duplex form, two pulverizers being shown, the'conduit being bifurcated at both extremities, the two members at the discharge endcommunicating with a corresponding number of doors of a single fire box or of two fire boxes as may be desired.

Fig. 4 is asection taken on the line 44, Fig. 5.

the pulverizer having an inlet conduit 7 for the material to be ulverized and an outlet conduit or disc arge nozzle 8 for the pulverized materialf This discharge nozzle projects into the chamber 9. of a casing 10 which is inclined from its outer extremity downwardly, its lower extremity having an.

exit port 12 for particles of solid material, the said port reglstering with a return conduit 13 which communicates with the feed conduit 7, whereby'the solid or too coarsely pulverized particles are returned to the grinder for retreatment. The casing 10 inclosing the chamber 9 is virtually divided into two compartments 14 and 15, the compartment 14 being provided with an adjustable baflie plate 16 which is equipped with a stem 17 protruding exteriorly from the chamber and adjustable to regulate the space between the discharge extremity of the nozzle 8 and the baffle plate. The compartment 15 within the chamber 9 consists of an open-ended tubular member 18 whose outer extremity telescopes in the adjacent extremity of a conduit member 19 which projects into the chamber 9a short distance and also extends beyond the same. The inner extremity of the tubular member 18 is equipped with a yoke 20 with which is con-' nected as shown at 21 a rod or stem 22 which is slidable freely in a perforation 23 formed in the adjacent extremity of the casing 10.

This tubular member 18 forming the com-- partment 15 is readily adjustable within the casing 10, whereby its inlet extremity 24:

may 'be spaced a greater or less distance from the baflie plate 16.

The conduit member 19, is preferably equipped with a damper 25 .controlled by an'exposed handle 2.

It will be noted that two pulverizing members 5 are shown and a corresponding number of classifiers each composed of a casing 10,; an adjustable bafile 16 and anadjustable open-ended tubular member 18-, as heretofore explained. The two conduit members 19- are connected with a crotchshaped conduit member 26 which is connected at its forward extremity with a central single conduit member 27 the forward extremity of the latter communicating with.

a second crotch-shaped member 28, the forward extremities of the latter communicating respectively with two conduit members 29 which are in communication withfeed j openings 30 of a fire box 31 by means of discharge nozzles 32. The inlet openings 30 are each equipped with a thimble 33 con- 'm0re pulverizers 5 an which may be designated in its entirety by the numeral 35. Each of the parts of the crotch-shaped conduit member 28 is preferably equipped with a damper 36 of substantially the same construction as the.

dampers 25 of the conduit members 19.

From the foregoing description the use and operation of my improved classifier will be readily understood. -The material to be fed to the furnace'is. ulverized in one or d discharged through the medium of a blower 6 and a discharge nozzle 8 into the chamber 9 of the casing 10, in which chamber it first strikes the bailie plate 16. The very finely comminuted material, being reduced to a fine or dust-like form or an impalpable powder, will rise after striking the bafiie plate and enter the inner open end 24 of the tubular member 5 of the classifier and pass thence under the influence of the air current from the blower,

through the conduit structure into the furnace or fire box; while the coarser ma- 9 and slide down through the port 12 and conduit 13 and return thence to the pulverizer for retreatment. referring to Figs. 1 and 2 of the drawing that the discharge nozzle 8 protrudes a considerable distance into the-chamber 9 and forwardly or inwardly beyond the escape port 12 for the solid particles of matter. In this way the said solid particles are allowed to settle beyond the path of the draft from the blower, and returnto the pulverizer through the route'heretofore explained.

Having thus described my invention, what I claim is,

1. A classifier comprising an impervious casing having an inlet opening at one end and a discharge opening at the opposite end,

the two openings being wholly out of aline- -ment, a bafile arranged in the casing forward of and spaced from the inlet opening, and an open-ended conduit member mounted in the casing in the rear of and in communication with the discharge opening, the rear end of the said conduit member being in communication with thechamber of the casing, the saidbafiie being adjustable flatwise toward and away from said inlet opening.

It will be noted by end of the said conduit'inember being in communication the chamber of the casing, the said conduit member being adjustably mounted in the casing, and said bafiie being adjustable flatwise toward and away from said inlet opening.

3. A classifier comprising an impervious casin occupying a position downwardly incline from its forward extremity, said casing having outlet and inlet openings respectively formed in its front and rear walls, said openings being arranged wholly out of alinement with each other, a bafile plate arranged in front of but at some distance from the inlet opening, a conduit member passing through the inlet opening and projecting some distance into the chamber of the casing, the latter having a relatively small outlet opening formed in its rear wall for the escape of the relatively coarse particles of the material under treatment.

4 A classifier comprising an impervious caslng havlng a downwardly lncllned lower wall, an outlet opening arranged in' its front,

wall and an inlet opening in its rear wall, said openings being arranged wholly out of alinement with each other, a baflie plate arranged opposite said inlet opening and casing having a downwardly inclined lower v wall, an outlet opening arranged in its front wall and an inlet opening in its rear wall, said openings being arranged wholly out of alinement with each other, a baflie plate arranged opposite said inlet opening and parallel to said rear wall, a conduit extending into said casing from said inlet opening and directed toward said bafl'le plate, the baffle plate, being adjustable flatwise toward and from said conduit, a conduit extending into the casing from the outlet opening and being longitudinally adjustable to vary the distance of its mouth from the rear wall.

In testimony whereof I aflix my signature, in presence of two witnesses.

EDWARD F. MoCOOL.

Witnesses:

GRACE HUs'roN, A. EBERT OBRIEN.

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