US2372316A - Dust collector - Google Patents

Description

H. W. CURTIS DUST COLLECTOR March 27, '1945.

Filed March 5, 1943 e a T T y MM Mar; 27, 1945 nUs'r coLLnc'roa Harold W. .Curtis, Stoughton, Mass, assignor B. F. Sturtevant Company, Boston, Mass.

"application March 5, Q1943, Serial No. 478,088

7 2 Claims.

This provision relates to dust collectors and has as an object the provision of a rugged, emcient collector which may be inserted at the inlet or an induced draft fan for removing dust entrained in the gas moved by the fan.

Cyclone type dust collectors are generally used for connection to the induced draft fans of, for

- example, steam power plants for removing cinaway, along the lines 2-2 of Fig. 1, and

Fig. 3 is an enlarged sectional view of one of the nozzles and its associated tubes of Fig. 1.

The casing 5 has extending upwardly therefrom, the gas inlet duct 8, and has the dust hopper 7 extending downwardly therefrom in alignment with the duct 6.

The outlet duct 6 extends the width and depth oi the casing, has its inner end connected thereunto and extends therefrom for connection at its outer end as to an induced draft tan.

At the connection of the inlet duct 6 to the casing l, the plate 9 extends therebetween and contains the plurality of converging nozzles I I. The cylindrical tubes ii are mounted in the casing 5 below and in alignment with the nozzles, the interiors of the tubes ll being substantially larger than the lower ends of the nozzles.

The plate #2 which supports the tubes Ii from the sides of the casing 5 and which separates the space within the casing around the tubes from the hopper, extends into the outlet duct 8 to overlap a portion'or the lower wall I 3 of the duct 8. forming a, recirculated air passage H in which is mounted the adjustable damper it.

As the gas and entrained dust from the inlet duct 6 passes through the nozzles Ill, the velocity is increased and although the larger portion of the gas is drawn from the nozzles and around the exteriors or the tubes ii, the dust particles are given suiilcient momentum to cause them to pass through the tubes ii into the hopper 1.

The dust free gas from the hopper is drawn therefrom through the passage it. the

damper II. The damper it is adjusted to provide suiiicient suction through the passage to provide a slight negative pressure therein for iacilitating the dust collection and for providing recirculation, yet lnsu'flicient to cause the dust particles from the hopper l to be drawn into the outlet duct.

While one embodiment of the invention has been described for the purpose of illustration, it should be understood that the invention is'not limited to the exact apparatus and arrangement of apparatus illustrated as modification therefrom may be suggested by those skilled in the art without departure from the essence'of the invention.

What is claimed is:

1. A dust collector comprising a casing, a plurality of spaced, substantially vertically extending tubes in said casing, a dust hopper attached to said casing below said tubes, at substantially horizontal plate extending across said casing above said tubes, means forming a plurality of relatively small nozzles in said plate aligned with said tubes, an outlet duct having a substantially horizontal lower wall attached to said hopper and having a substantially horizontal upper'wall attached to said plate, and a substantially horizontal partition extending across said casing above said lower wall of said duct, said partition having perforations therein through which said tubes extend, said partition and said lower wall forming a passage into said outlet duct for dust free gas from said hopper,

2. A dust collector comprising a casing, a plurality of spaced. substantially vertically extending tubes in said casing, a dust hopper attached to said casing below said tubes, a substantially horizontal plate extending across said casing above Said' tubes, means forming a plurality of relatively small nozzles in said plate aligned with said tubes, an outlet duct having a substantially I horizontal lower wall attached to said hopper and having a substantially horizontal upper wall attached to said plate, a substantially horizontal partition extending across said casing above said lower wall of said duct, said partition having perforations therein through which said tubes extend, said partition having a Portion extending into said duct overlapping said lower wall, and

a. damper between said portion of said partitionv and said lower wall, said partition and said lower wall forming a passage into said outlet duct dust free gas from said hopper.

HAROLD W. CURTIS.

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