Compost curing system

• US 5,459,071 A
• Filed: 05/02/1994
• Issued: 10/17/1995
• Est. Priority Date: 05/02/1994
• Status: Expired due to Term

• Current Assignee: Bedminster International Limited
• Original Assignee: Bedminster Bioconversion Corporation
• Inventors: Finn, Larry J.
• Primary Examiner(s): Redding, David A.
• Application Number:
  US08/235,970
• Time in Patent Office: 533 Days
• Field of Search: 422/184, 435/305, 435/316, 366/345, 366/346
• US Class Current: 435/290.2
• CPC Class Codes: C05F 17/939 Means for mixing or moving with predetermined or fixed paths, e.g. rails or cables
• CPC Class Codes: Y02P 20/145 the feedstock being materials of biological origin
• CPC Class Codes: Y02W 30/40 Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse

Abstract

A compost curing system utilizing a compost turner of generally V-shaped configuration, one leg of the "V" being formed by counter-rotating ribbon augers and the other leg of the "V" being formed by pair of over-under conveyors, the lower conveyor being adjustably extendable to vary the throw of the conveyor system. The legs of the "V" are piviotally interconnected to permit their angular adjustment and are pivotally mounted on a frame structure for attachment to a motorized conveyance. The system includes means for injecting air into compost undergoing treatment and air collection and air treatment apparatus for controlling the temperature of process air emanating from the compost pile for reuse and for deodorizing the air prior to its release to the atmosphere.

Claims

1. A compost curing system comprising;

a bay containing compost to be cured, said bay having at least one longitudinally extending side wall, a floor and having off-loading and loading areas;

compost turning apparatus comprising a generally V-shaped mechanism one leg of the V consisting of a pair of counter-rotating augers and the other leg of the V consisting of a conveyor, and said legs being hinged at their common base position to permit their angular adjustment;

a bridging crane overlying compost within said bay, one end of the crane being supported on said side wall and the opposite end being supported on said floor by a wheel-footed beam;

a support carriage adapted for movement along said crane;

means pivotally interconnecting said compost turning apparatus to said carriage;

means for energizing said augers and conveyor and for moving said carrier means and attached apparatus along said crane and for positioning the augers in the off loading area in contact with edge portions of the compost pile whereby the compost is fragmented and conveyed down said auger and deposited onto said conveyor for transport into newly formed piles;

means for moving said crane in incremental steps along said side wall upon completion of each side-to-side traverse of said carrier means, the composite movements of said crane and carrier resulting in said turning apparatus traversing the entire body of compost within said bay; and

means for returning said apparatus to the off-loading area to permit repetition of the turning cycle.

2. A compost curing system comprising;

a bay containing compost to be cured, said bay including a pair of spaced longitudinally extending side walls and a floor and having off-loading and loading areas;

means for injecting air into said compost;

compost turning apparatus comprising a generally V-shaped mechanism one leg of the V consisting of a pair of counter-rotating ribbon augers and the other leg of the V consisting of a conveyor, said legs being hinged at their common base position to permit movement of the legs from their V-shaped orientation to a generally straight line orientation;

a bridge crane movably supported on said side walls;

carrier means movably mounted to said bridge crane;

means pivotally interconnecting said compost turning apparatus to said carrier means and for positioning the augers of said apparatus in contact with edge portions of the compost;

means for energizing said augers and conveyor and means for moving said carrier means and attached apparatus along said bridge crane from side wall to side wall whereby said augers rake off layers of the compost for movement down the blades of the augers onto said conveyor for transport into newly formed piles; and

means for moving said bridge crane in incremental steps along said side walls upon completion of each side-to-side traverse of said carrier means;

the composite movements of said bridge crane and said carrier means resulting in said turning apparatus traversing the entire body of compost within said bay.

3. The system set forth in claim 1 including means for elevating the legs of said apparatus to a substantially in-line position overlying the compost within said bay said apparatus completing its transverse of the compost within the bay;

means for returning said apparatus over said compost to the off-loading area; and

means for lowering said legs into their original V-shaped position to permit repetition of the turning cycle.

4. The system set for in claim 1 including means forming an enclosure covering said bay.

5. The system set forth in claim 4 including duct means within said enclosure and associated blower means for capturing air emanating from compost within said enclosure and means for circulating captured air through the enclosed compost.

6. The system set forth in claim 5 including heat transfer means for regulating the temperature of air undergoing recirculation and means for reintroducing heat-regulated air into compost within said enclosure.

7. The system set forth in claim 6 including valve means for directing captured air either for recirculation through compost within said enclosure and/or for release to the atmosphere.

8. The system set forth in claim 7 including means for deodorizing the air prior to its release to the atmosphere.

9. The system set forth in claim 8 wherein said deodorizing means comprises a biofilter.

10. A compost turner of generally V-shaped configuration, one leg of the "V" comprising a pair of counter-rotating ribbon augers and the other leg comprising conveyor means, said augers and conveyor means being pivotally interconnected at their common base position and to a motorized conveyance.

11. A compost turner as set forth in claim 10 including paddle wheels mounted to the base of each auger for rotation therewith.

12. A compost turner as set forth in claim 10 wherein said conveyor means consist of a pair of conveyors one of which is extendable relative to the other.