Apparatus for separating dust from gases

• US 4,756,729 A
• Filed: 05/28/1986
• Issued: 07/12/1988
• Est. Priority Date: 05/28/1985
• Status: Expired due to Term

• Current Assignee: Voest-Alpine Industrieanlagenbau GmbH (Voestalpine AG)
• Original Assignee: Voestalpine AG
• Inventors: Brunnmair, Erwin, Faltejsek, Karl
• Primary Examiner(s): Nozick, Bernard
• Application Number:
  US06/867,557
• Time in Patent Office: 776 Days
• Field of Search: 55/391, 55/392, 55/394, 55/395, 55/396, 55/338, 55/345, 55/458, 55/416, 55/459 R, 55/459 A, 55/459 B, 55/457
• US Class Current: 55/391
• CPC Class Codes: B01D 45/12 by centrifugal forces centrifuges B04B; cyclones B04C
• CPC Class Codes: B04C 5/103 Bodies or members, e.g. bulkheads, guides, in the vortex chamber cores B04C5/107
• CPC Class Codes: B04C 5/12 Construction of the overflow ducting, e.g. diffusing or spiral exits
• CPC Class Codes: B04C 5/14 Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations provided with a great number of slits or perforations B04C5/10
• CPC Class Codes: B04C 7/00 Apparatus not provided for in group B04C1/00, B04C3/00, or B04C5/00; Multiple arrangements not provided for in one of the groups B04C1/00, B04C3/00, or B04C5/00; Combinations of apparatus covered by two or more of the groups B04C1/00, B04C3/00, or B04C5/00

Abstract

In an apparatus for separating dust from gases, the gases are caused to flow in a rotating stream (3) within a substantially tubular and/or conical housing (1). A guiding body (9) extends in axial direction of the housing (1). Gas supply is effected via a supply slot (2) and the discharge opening (10) for pure gas is formed of a gap surrounding the guiding body (9), in particular by a tube (13) surrounding the guiding body (9) with formation of a gap. The dust discharge openings are designed as annular slots (7) located adjacent the inner wall (6) of the housing (1). A dust collecting bunker (5) is connected to the bottom of the housing.

Claims

1. Apparatus for separating dust from dust-laden gases comprising:

a substantially tubular housing having a side wall;

a tangential inlet to said housing for introducing dust-laden gases such that the gases are given a rotational downward movement within the housing;

a generally cylindrical guide body disposed axially within the housing;

generally radially disposed deflecting means within the housing for deflecting gases rotationally upward and forming with said side wall an annular dust discharge gap; and

a tube having an open end surrounding the guide body and forming therewith an annular dust-free gas outlet gap through which dust-free gas leaves the housing, said cylindrical guide being tubular and having an open end within said tube, and said tube including vanes downstream of said gap with respect to the direction of flow of gas through said gap, said vanes deflecting the gas into the open end of said guide body.

2. Apparatus for separating dust from dust-laden gas comprising:

a vertically disposed housing having a sidewall forming a cylindrical upper housing portion and forming a downwardly and inwardly tapered conical lower housing portion;

a tangential inlet to the upper housing portion for introducing dust-laden gas;

a generally cylindrical guide body disposed axially within the housing and extending the length of the housing;

a vertical tube having an open end surrounding the guide body at a location in the upper housing portion and forming with the guide body an annular gap through which dust-free gas passes from the housing;

a generally radial deflecting means surrounding the guide body at the lower end of the conical housing portion, said deflecting means forming with said housing side wall an annular gap for discharging dust, the arrangement of the inlet, side wall, guide body and deflecting means being such that dust-laden gas entering the housing are given a downwardly spiral movement along the side wall with the result that dust separates from the gas and passes through the dust discharge gap and such that dust-free gas is deflected radially inwardly by the deflecting means and moves upwardly along the outside of the guiding body to the dust-free discharge gap;

means for conducting the dust-free gas from said gap to a location outside the housing;

a whirl-free dust bunker connected to the lower end of the conical housing portion for receiving dust from the dust discharge gap; and

pressure relief bores extending through the deflecting means at locations near the guide member for preventing the occurrence of superatmospheric pressure within the dust bunker during operation of the apparatus.

3. Apparatus for separating dust from dust-laden gases comprising:

a substantially tubular vertical housing having a side wall, a cylindrical upper portion and a lower conical portion tapering inwardly and downwardly;

a tangential inlet to said housing for introducing dust-laden gases such that the gases are given a rotational downward movement within the housing;

a generally cylindrical guide body disposed axially within the housing and extending the whole length thereof;

generally radially disposed deflecting means within the housing for deflecting gases rotationally upward and forming with said side wall an annular dust discharge gap, said deflecting means being located at the lower end of said conical housing portion and being annular in shape and surrounding said guide body and said deflecting means having pressure relief openings therethrough at locations close to said guide body;

a tube having an open end surrounding the guide body and forming therewith an annular dust-free gas outlet gap through which dust-free gas passes from the housing; and

means for conducting the dust-free gas from said gap to a location outside the housing.