[특허]Apparatus and method for de-watering of slurries

Genesis Fluid Solutions, Ltd

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특허 상세정보

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Apparatus and method for de-watering of slurries

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01D-033/72 B01D-033/80 B03D-003/06 B07B-001/28 B65G-053/26
미국특허분류(USC)	210/456; 210/221.2; 210/151; 210/710; 210/768; 210/800; 210/499; 210/806; 210/780; 210/328; 210/330; 210/416.1; 406/046; 406/089; 406/195; 209/005; 209/017; 209/269
출원번호	US-0676699 (2007-02-20)
등록번호	US-8678200 (2014-03-25)
발명자 / 주소	Hodges, Michael Kent Campbell, Larry D.
출원인 / 주소	Genesis Fluid Solutions, Ltd
대리인 / 주소	Morrison & Foerster LLP
인용정보	피인용 횟수 : 1 인용 특허 : 15

초록
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A system for dewatering a stream of slurry has a first and a second separator. The first separator removes objects above a first size, to produce a stream of primary treated slurry. The second separator removes objects above a second size from the primary treated stream, the second size being smaller than the first size. Optionally, a third separator removes objects above a yet smaller third size from the stream of secondary treated slurry. The first separator has a plurality of sieve mat supports alternately connected to a main support frame section and a movable support frame section so that the flexible sieve mat can be agitated by the movable support frame section, a collector being provided for collecting the primary treated slurry passing through the flexible sieve mat. In an optional step, water contained in the separated solids is removed.

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1. A duct for use in an apparatus for separating suspended solids from a liquid, the duct comprising: an inlet for receiving an input flow of slurry comprising the suspended solids suspended in the liquid;an inlet portion for receiving the input flow of slurry from the inlet to produce an internal flow of slurry;an outlet portion for receiving the internal flow of slurry from the inlet portion to produce an output flow of slurry, wherein the maximum width of the outlet portion is greater than the maximum width of the inlet portion, both maximum widths determined in a direction normal to the internal flow of slurry;a duct section that connects the inlet and outlet portions, wherein the duct section comprises:an upper portion having a length to width aspect ratio of at least 40:1 in a plane normal to the internal flow of slurry; andat least one gas feed configured to introduce gas into the internal flow of slurry, wherein: the at least one gas feed comprises a gas-feed conduit having a plurality of apertures, wherein at least the plurality of apertures and a portion of the gas feed conduit are located in the duct section,the gas-feed conduit is connected to a gas-pressure control configured to increase a gas flow rate in order to purge the duct section of previously suspended solids that settle in the duct section, andthe at least one gas feed is configured to produce gas bubbles that break the surface at the outlet portion resulting in the output flow of slurry comprising the suspended solids suspended in the liquid. 2. The duct of claim 1, wherein: the plurality of gas feed apertures are located within the duct section at different distances from the inlet portion, the size of the apertures decreasing with increasing distance from the inlet portion. 3. The duct of claim 1, wherein: the gas conduit extends along at least part of the duct section. 4. The duct of claim 1, wherein: the at least one gas feed is a plurality of gas feeds located at different positions in the duct section. 5. An apparatus for de-watering a stream of slurry, comprising: a first separator for separating objects larger than a first size from the stream, producing a stream of primary treated slurry, the first separator comprising: a frame assembly with a main support frame section and a movable support frame section, the movable support frame section movably mounted on the main support frame section;a plurality of sieve mat supports spaced transversely along a length of the frame assembly;a sieve mat, comprising a flexible material, extending along the length of the frame assembly and connected to and supported by the plurality of sieve mat supports, the sieve mat supports being alternately connected to the main support frame section and the movable support frame section, anda collector located below the sieve mat for collecting primary treated slurry passing through the sieve mat;a second separator, in communication with the first separator to receive the primary treated slurry, for separating objects larger than a second size therefrom, the second size being smaller than the first size, to produce a stream of secondary treated slurry; anda third separator, in communication with the second separator to receive the secondary treated slurry, for separating objects larger than a third size therefrom, the third size being smaller than the second size, to produce a stream of tertiary treated slurry, the third separator comprising a duct according to claim 1. 6. The apparatus of claim 5, further comprising: an eccentric drive mechanism connected to the main frame support for applying a drive force thereto. 7. The apparatus of claim 5, further comprising: an agitator, arranged to animate the flexible material of the sieve mat. 8. The apparatus of claim 5, wherein: the sieve mat has upwardly curved lateral sides. 9. The apparatus of claim 8, wherein: the upwardly curved lateral sides provide a non-vertical, gradually curved shape to the sieve mat. 10. The apparatus of claim 5, wherein: the sieve mat is disposed at a declined orientation. 11. The apparatus of claim 5, wherein: the collector comprises a tank. 12. A method of feeding water having solids suspended therein for use in a method for separating the solid from the water, the method comprising the steps of: feeding water having solid suspended therein into the duct described in claim 1, wherein a gas is fed into the flow of water having solid suspended therein via the plurality of apertures. 13. A method of dewatering a stream of slurry, comprising the steps of: passing the stream of slurry through a first separator to separate solids larger than a first size from the stream, producing separated solids and a stream of primary treated slurry;passing the stream of primary-treated slurry through a second separator to separate solids larger than a second size, smaller than the first size, from the stream of primary treated slurry, producing separated solids and a stream of secondary-treated slurry; andpassing the stream of secondary treated slurry through the duct of claim 1 to separate solids larger than a third size, smaller than the second size, from the stream of secondary treated slurry, producing separated solids and a stream of tertiary-treated slurry;wherein the first separator comprises:a frame assembly having a main support frame section and a movable support frame section movably mounted on the main support frame section;a plurality of sieve mat supports spaced transversely along the length of the frame assembly;a flexible sieve mat extending along the length of the frame assembly, the sieve mat connected to and supported by the sieve mat supports, the sieve mat supports being alternately connected to the main support frame section and the movable support frame section, such that continuously agitating the movable support frame section imparts motion to parts of the flexible sieve mat connected to the movable support frame section; anda collector, below the flexible sieve mat, for receiving treated slurry passing therethrough. 14. The apparatus of claim 5, further comprising: an apparatus for supplying the stream of slurry to the first separator, the apparatus comprising:a water-borne vessel with first and second sections, the first section positioned above the second section, with a filter screen separating the respective sections, the filter screen selected to retain in the first section a portion of the solids contained in a slurry and to allow the water and remaining solids to pass therethrough as a treated slurry; anda pump assembly, an inlet thereof connected to the second section to reduce the pressure in the second section relative to the first section, and an outlet thereof communicated to the first separator for transferring the treated slurry thereto. 15. The duct of claim 1, further comprising: a second gas feed for introducing gas into the input flow of slurry at the inlet portion. 16. The duct of claim 1, wherein: the at least one gas feed is configured such that the gas introduced into the internal flow of slurry reduces the average density of the internal flow of slurry in the duct portion. 17. The duct of claim 1, wherein the duct section further comprises a base portion having a length to width aspect ratio from 1:1 to 4:1 in a plane normal to the internal flow of slurry. 18. The duct of claim 1, wherein the upper portion has a length to width aspect ratio between 40:1 and 100:1 in a plane normal to the internal flow of slurry. 19. The duct of claim 1, wherein: the duct section comprises at least two opposed diverging wall sections characterized by a reduction in hydrostatic pressure as distance from the inlet portion is increased, andthe plurality of gas feed apertures are located along the diverging wall sections of the duct section, the plurality of gas feed apertures configured to provide a gas feed rate that is substantially equal. 20. The duct of claim 1, wherein: the duct section includes two opposed diverging wall sections;the at least one gas feed comprises at least two gas-feed conduits, a first gas-feed conduit having a first set of apertures along one of the two opposed diverging wall sections, anda second gas-feed conduit having a second set of apertures along the other of the two opposed diverging wall sections,wherein,each of the at least two gas-feed conduits is connected to an independently controllable gas-pressure control;each of the gas-pressure controls is configured to increase the gas flow rate through the corresponding gas-feed conduit in order to purge the duct section of the previously suspended solids that settle in the duct section. 21. The duct of claim 1, wherein the at least one gas feed conduit is configured to produce gas bubbles having a diameter of approximately 1 cm. 22. The duct of claim 1, wherein the gas feed comprises: a pressure regulator valve to control the pressure of the gas in the gas-feed conduit.

이 특허에 인용된 특허 (15)

이 특허를 인용한 특허 피인용횟수: 1

Wu, Jie; Graham, Lachlan; Farrow, John; Nguyen, Bon. Method, system and device for reducing friction of viscous fluid flowing in a conduit. USP2016119488316.

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Apparatus and method for de-watering of slurries

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Apparatus and method for de-watering of slurries

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