Cyclone separator with filter assembly for pneumatic conveyor

• US 5,163,786 A
• Filed: 07/06/1991
• Issued: 11/17/1992
• Est. Priority Date: 08/12/1987
• Status: Expired due to Fees

• Current Assignee: Christianson Systems, Inc.
• Original Assignee: Christianson Systems, Inc.
• Inventors: Christianson, Roy O.
• Primary Examiner(s): Stormer, Russell D.
• Assistant Examiner(s): KANNOFSKY, JAMES
• Application Number:
  US07/728,043
• Time in Patent Office: 500 Days
• Field of Search: 406/41,170-173, 406/168, 406/169, 406/109, 406/122, 406/175, 406/65, 406/67, 406/68, 406/181-183, 209/144, 55/312, 55/293, 55/294, 55/295, 55/337, 55/467, 55/325, 55/328, 55/413
• US Class Current: 406/41
• CPC Class Codes: B65G 53/60 Devices for separating the materials from propellant gas

Abstract

A cyclone separator (20) for a pneumatic grain conveyor (10) includes a filter assembly (60) mounted in the upper end thereof. The filter assembly (60) includes a cylindrical casing (62) extending into the separator (20) with a screen (70) therein and an adjustable accelerator plate (84) which cleans an adjacent portion of the screen and distributes the collected dust and foreign particles on the remainder of the screen. A second filter assembly (90) is preferably connected between the air outlet of the separator (20) and air inlet of the blower (52) for further dust and foreign particle removal.

Claims

1. A pneumatic grain conveyor, comprising:

a frame;

a cyclone separator mounted on said frame, said separator including a closed housing with a generally cylindrical upper side wall with a tangential material inlet and an air outlet in a top end wall, and a generally conical truncated lower side wall with a material outlet at a bottom end thereof;

a first filter assembly mounted in said air outlet of said separator, said first filter assembly comprising;

a generally cylindrical subhousing extending axially into the top end wall of the housing of said cyclone separator, said subhousing having an external top end and an internal bottom end;

a generally cylindrical screen with top and bottom ends disposed within said subhousing;

a first transverse baffle plate mounted inside said screen between the ends thereof, said first baffle plate defining a predetermined open annulus with said screen;

means for adjustably positioning said first baffle plate longitudinally within said screen;

means defining a radial air outlet adjacent said screen in the top end of said subhousing;

a second transverse baffle plate mounted between the bottom end of said subhousing and the material outlet of said cyclone separator;

a rotary valve including a material inlet connected to the material outlet of said cyclone separator, a material outlet, and an air inlet;

a blower including an air inlet connected to the air outlet in the top end wall of said cyclone separator, and an air outlet connected to the air inlet of said rotary valve means;

a second filter assembly connected between the air outlet of said separator and the air inlet of said blower; and

means for driving said blower.

2. A pneumatic grain conveyor, comprising:

a frame;

a cyclone separator mounted on said frame, said separator including a closed housing with a top end wall with an air outlet therein, a generally cylindrical upper side wall with a tangential material inlet therein, and a generally conical truncated lower side wall with a material outlet at a bottom end thereof;

a filter assembly comprising;

a filter means for collecting particulate material from an air stream, said filter means further comprising a generally cylindrical filter element mounted in the air outlet of said cyclone separator whereby the particulates are collected on an inner surface of said element, and means for selectively cleaning the collected particulates from said filter element while said pneumatic conveyor is in operation wherein said cleaning means comprises means for directing an accelerated airflow against selected portions of said inner surface of said element;

means for removably mounting said filter assembly in the air outlet of said cyclone separator;

a rotary valve including a material inlet connected to the material outlet of said cyclone separator, a material outlet, and an air inlet;

a blower including an air inlet connected to the air outlet in said cyclone separator, and an air outlet connected to the air inlet of said rotary valve; and

means for driving said blower.

3. A pneumatic grain conveyor, comprising:

a frame;

a cyclone separator mounted on said frame, said separator including a closed housing with a top end wall with an air outlet therein, a generally cylindrical upper side wall with a tangential material inlet therein, and a generally conical truncated lower side wall with a material outlet at a bottom end thereof;

a filter assembly comprising;

a filter means comprising a generally cylindrical filter element mounted in the air outlet of said cyclone separator for collecting particulate material from an air stream on an inner surface of said element, a baffle plate adjustably mounted along a central longitudinal axis of said filter element within said filter element and defining an annular opening between said plate and said inner surface of said element whereby an accelerated air flow is directed against selected portions of said inner surface to selectively clean the collected particulates while the pneumatic conveyor is in operation;

means for removably mounting said filter assembly in the air outlet of said cyclone separator;

a rotary valve including a material inlet connected to the material outlet of said cyclone separator, a material outlet, and an air inlet;

a blower including an air inlet connected to the air outlet in said cyclone separator, and an air outlet connected to the air inlet of said rotary valve; and

means for driving said blower.