IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0869706
(1997-06-05)
|
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발명자
/ 주소 |
|
| 대리인 / 주소 |
Jones, Day, Reavis & Pogue
|
| 인용정보 |
피인용 횟수 :
33 인용 특허 :
6 |
초록
▼
A system and process for continuously separating and recoveringmaterials from a heterogeneous mixture of particulate solids, from a solid waste or waste stream source, which uses a plurality of liquid media of different specific gravity to effect the separations, the solids having a plurality of dif
A system and process for continuously separating and recoveringmaterials from a heterogeneous mixture of particulate solids, from a solid waste or waste stream source, which uses a plurality of liquid media of different specific gravity to effect the separations, the solids having a plurality of different specific gravities and the recovered fractions each having a different specific gravity, wherein a first separation vessel receives the heterogeneous mixture, contacts the material with a first liquid medium having a first specific gravity of about 1.0, thereby causing a first part of the mixture to rise in the liquid medium as float particles, the remaining part to settle as sink particles, removing the separated float particles and sink particles without intermixture, then providing a second separation vessel, which receives the sink part from the first separation vessel contacts the material with a second liquid medium having a second specific gravity different from that of the first liquid medium, thereby causing a first particle of the material to rise in the liquid medium as float particles, the remaining part to settle as sink particles, and removing the separated float particles as a substantially organic particulate mixture, and the separated sink particles as a substantially inorganic particulate mixture, without intermixture between the product streams.
대표청구항
▼
[ I claim:] [1.] A separation process for continuously separating a heterogeneous mixture of particulate solids, said solids having a plurality of different specific gravities, using a plurality of liquid media of different specific gravity, said heterogeneous mixture being separated into a pluralit
[ I claim:] [1.] A separation process for continuously separating a heterogeneous mixture of particulate solids, said solids having a plurality of different specific gravities, using a plurality of liquid media of different specific gravity, said heterogeneous mixture being separated into a plurality of fractions, each of different specific gravity, said process comprising:(a) a first separation stage, further comprising introducing said heterogeneous mixture into a first separation vessel, containing a first liquid medium having a first specific gravity of about 1.0, such that said heterogeneous mixture contacts said first liquid medium, a first part of said mixture rising in the liquid medium as float particles, the remaining part settling in the liquid medium as sink particles,whereby porous materials present in said heterogeneous mixture having a specific gravity of less than about 1.0 are substantially separated as said float particles;(b) removing said float particles from said first vessel, to recover a porous product material;(c) removing said sink particles from said first vessel;(d) classifying a portion of said sink particles to isolate a waste-derived solid particulate suspension media fraction comprising substantially no organic material or clay;(e) a second separation stage, further comprising introducing the portion of said sink material removed from said first separation vessel and not classified, into a second separation vessel containing a second liquid medium having a second specific gravity, different from the specific gravity of said first liquid medium, said liquid medium including a waste-derived particulate suspension media component present in a quantity sufficient to attain said second specific gravity, such that said remaining sink particles contact said second liquid medium, a first part of said particles rising in the liquid to form float particles, the remaining part settling in the liquid medium as sink particles,whereby organic materials present in said remaining sink particles fraction from said first separation stage are substantially separated as float particles;(f) removing said organic float particles from said second vessel as a substantially organic particulate mixture;(g) removing said sink particles from said second vessel as a substantially inorganic particulate mixture;(h) recovering and recycling said waste-derived particulate suspension media component into said second separation stage;(i) performing at least one additional separation upon said substantially organic particulate mixture, comprising a third separation stage using a third separation vessel containing a third liquid medium having a third specific gravity, different from the specific gravity of each of said first and second liquid mediums, said liquid medium including a waste-derived particulate suspension media component present in a quantity sufficient to attain said third specific gravity, to obtain at least one organic product material; and(j) performing at least one additional separation upon said substantially inorganic particulate mixture, comprising a fourth separation stage using a fourth separation vessel containing a fourth liquid medium having a fourth specific gravity, different from the specific gravity of each of said first, second and third liquid mediums, said liquid medium including a non waste-derived particulate suspension media component present in a quantity sufficient to attain said fourth specific gravity, to obtain at least one inorganic product material.
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