IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0377810
(2006-03-15)
|
등록번호 |
US-7815810
(2010-11-08)
|
우선권정보 |
IN-2988/DEL/2005(2005-11-08) |
발명자
/ 주소 |
- Bhalchandra, Pandit A.
- Vinayak, Ranade V.
- Chandrashekar, Anil A.
- Shivram, Sawant S.
- Dandayudapani, Ilangovan
- Rajachandran, Madhan
- Krishnamurthy, Pilarisetty V.
|
출원인 / 주소 |
- Council of Scientific and Industrial Research
- Mumbai University Institute of Chemical Technology
|
대리인 / 주소 |
Edwards Angell Palmer & Dodge LLP
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
1 |
초록
▼
The invention disclosed provides an apparatus and method for disinfection of ship's ballast water, such as sea water, based on hydrodynamic cavitation. The apparatus comprises a cavitating chamber of cross section such as circular or non circular shape housing a single or multiple cavitating element
The invention disclosed provides an apparatus and method for disinfection of ship's ballast water, such as sea water, based on hydrodynamic cavitation. The apparatus comprises a cavitating chamber of cross section such as circular or non circular shape housing a single or multiple cavitating element(s) in the form of plates of metallic, ceramic, plastic materials of varying thicknesses placed perpendicular to the direction of flow of liquid and positioned at uniform or non-uniform spacing. The cavitating elements are provided with single or multiple orifices of different cross sections, circular or non-circular, with or without sharp edges and with a fraction of cross-sectional open area of the passage. The disinfected water may be re-circulated through the system for additional disinfection or released from the tank into the surrounding waterways. The disinfection of seawater/ship's ballast water is achieved by hydrodynamic cavitation and the method does not involve use of any chemicals or any chemical reaction. The invented apparatus and method is simple, eco-friendly and can be fitted on to existing intake and discharge systems of any ship with minor modifications. It poses no risk to the health of the ship's crew unlike chemical methods and requires no special skill or additional manpower for its operation. The apparatus and method is capable of effectively sterilizing hazardous organisms contained in ballast water stored in a ballast tank.
대표청구항
▼
We claim: 1. An apparatus for disinfection of sea water/ship's ballast water, which comprises a water intake means consisting of a ballast water intake source and a pump means connected in series through a pressure gauge and check valve(s) to an inlet port of a cavitation chamber, optionally throug
We claim: 1. An apparatus for disinfection of sea water/ship's ballast water, which comprises a water intake means consisting of a ballast water intake source and a pump means connected in series through a pressure gauge and check valve(s) to an inlet port of a cavitation chamber, optionally through a heat exchanger, characterized in that the said cavitation chamber essentially being provided with single or multiple cavitating elements placed perpendicular to the direction of flow of fluid, said cavitating elements being spaced at uniform or non-uniform spacing and each said cavitating element having a fractional open area in the form of single or multiple orifices, the output of the said cavitation chamber being passed through a quality check point and check valve(s) to a ballast tank, the output of the said ballast tank being connected to a discharge pump through check valve(s) to a discharge outlet. 2. The apparatus as claimed in claim 1, wherein the cavitation chamber has water intake means through which seawater enters from outside a vessel. 3. The apparatus as claimed in claim 1, wherein the pump means is one or a series of pumps such as, but not limited to a ballast pump. 4. The apparatus as claimed in claim 1, wherein the heat exchanger is connected to an energy source such as a standard source or method known in the art, or steam or engine exhaust gases from the ships engine. 5. The apparatus as claimed in claim 1, wherein the cavitating chamber is of cross section such as circular or non circular shape. 6. The apparatus as claimed in claim 1, wherein the cavitating chamber houses a single or multiple cavitating element(s) in the form of plates such as of metallic, ceramic, plastic materials of varying thicknesses placed perpendicular to the direction of flow of liquid in series or in parallel and positioned at uniform or non-uniform spacing mounted therein and held in place by means such as flanges. 7. The apparatus according to claim 1, wherein the spacing between subsequent cavitating elements is in the range of 4 to 100 times the holding chamber diameter, spaced at uniform or non-uniform spacing. 8. The apparatus as claimed in claim 1, wherein the cavitating element is having a fraction of open area in the range of 0.01 to 0.90 times the holding chamber cross sectional flow area. 9. The apparatus as claimed in claim 1, wherein the cavitating element(s) having a fractional open area in the form of single or multiple orifices are either circular or non-circular with or without sharp edges, wherein each hole is having a diameter in the range of 500 micrometers to few millimeters. 10. The apparatus as claimed in claim 1, wherein (i) the diameter of cavitation chamber; (ii) the number of cavitation elements; (iii) the spacing between cavitation elements; (iv) the fractional open area and number, diameter and distribution of orifices on each cavitation element; (v) the operating temperature; (vi) the operating flow rate/flow velocity; (vii) the number of re-circulations through cavitation chamber; are estimated and configured using computational fluid dynamics (CFD) based models and Rayleigh-Plesset equation for cavitation collapse, such as herein described. 11. The apparatus as claimed in claim 1, wherein quality check point is provided with known devices capable of monitoring the quality of treated water. 12. The apparatus as claimed in claim 1, wherein to enable re-circulation of the treated water or a portion thereof if required by the quality check point, the discharge outlet of the said discharge pump being connected through a pressure gauge and check valve(s), optionally through a heat exchanger, to an inlet port of a cavitation chamber having single or multiple cavitating elements and back to the said ballast tank through a quality check point and check valves. 13. A method for disinfection of sea water/ship's ballast water using the apparatus as claimed in claim 1, said method comprising subjecting the ballast water to be treated to hydrodynamic cavitation by pumping the water intake of sea water, optionally pre-heated, into an inlet port of a cavitation chamber having single or multiple cavitating elements, the treated ballast water being passed through a quality check point to a ballast tank, re-circulating the treated water or a portion thereof if required by the quality check, for further hydrodynamic cavitation. 14. The method as claimed in claim 13, wherein the ballast water to be treated is optionally pre-heated to a temperature in the range of 10 to 70° C. 15. The method as claimed in claim 13, wherein the water flow rate through the cavitating element is such that the liquid velocities are in the range of 2 to 150 m/s. 16. The method as claimed in claim 13, wherein the water pressure is in the range of 0.5 to 150 kg/cm2. 17. The method as claimed in claim 13, wherein the method for disinfection treatment of water using hydrodynamic cavitation is also suitable for a wide variety of water treatment applications including but not limited to wastewater management, agricultural applications, pool and space applications, oil and gas applications, and various disinfectant applications
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