Grit chamber and a method for controlling the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-021/00
C02F-001/52
출원번호
US-0528918
(2008-02-15)
등록번호
US-8318026
(2012-11-27)
우선권정보
DK-2007 00242 (2007-02-15)
국제출원번호
PCT/EP2008/051856
(2008-02-15)
§371/§102 date
20090929
(20090929)
국제공개번호
WO2008/099004
(2008-08-21)
발명자
/ 주소
Hojsgaard, Soren Johannes
출원인 / 주소
Veolia Water Solutions & Technologies Support
대리인 / 주소
Coats & Bennett, P.L.L.C.
인용정보
피인용 횟수 :
0인용 특허 :
4
초록▼
A system for controlling the sedimentation of sand or grit particles suspended in waste water contained in a grit chamber by determining the temperature of water contained in the grit chamber and by operating a turbulence creating means on the basis of the water temperature. A method of controlling
A system for controlling the sedimentation of sand or grit particles suspended in waste water contained in a grit chamber by determining the temperature of water contained in the grit chamber and by operating a turbulence creating means on the basis of the water temperature. A method of controlling the sedimentation of sand and grit particles suspended in waste water contained in a grit chamber, by determining the temperature of water contained in the grit chamber and by operating a turbulence creating means on the basis of the water temperature.
대표청구항▼
1. A system for controlling the sedimentation of sand or grit particles in wastewater in a grit chamber, comprising: a reservoir for containing the wastewater and having an inlet and an outlet;a device for creating turbulence in the wastewater contained in the reservoir, the device for creating the
1. A system for controlling the sedimentation of sand or grit particles in wastewater in a grit chamber, comprising: a reservoir for containing the wastewater and having an inlet and an outlet;a device for creating turbulence in the wastewater contained in the reservoir, the device for creating the turbulence being configured to increase or decrease the turbulence in the wastewater;a water temperature sensor for determining the temperature of the wastewater; anda control unit operatively connected to the device for creating turbulence and operatively connected to the temperature sensor for controlling sedimentation in the grit chamber by increasing the turbulence of the wastewater in the reservoir in response to the temperature of the wastewater increasing and decreasing the turbulence of the wastewater in the reservoir in response to the temperature of the wastewater decreasing; wherein the device for creating turbulence is an air diffuser. 2. The system of claim 1, wherein the water temperature sensor is positioned in the area of the device for creating the turbulence and wherein the control unit is configured to control the device for creating turbulence based on the temperature of the wastewater in the area where the device for creating the turbulence is located. 3. The system of claim 1, wherein the control unit is operative to determine the viscosity of the wastewater from the determined temperature of the wastewater and wherein the control unit controls sedimentation in the grit chamber by controlling the operation of the device for creating turbulence based in part at least on the determined viscosity of the wastewater. 4. The system of claim 1, wherein controlling sedimentation in the grit chamber includes allowing sand, grit and other solid particles having a size greater than a threshold size to settle in the grit chamber while maintaining sand, grit and other solid particles having a size less than the threshold size to remain suspended in the wastewater. 5. The system of claim 1, further including a velocity sensor for sensing the velocity of the wastewater flowing in the grit chamber and wherein the velocity sensor is operatively connected to the control unit; and wherein the control unit controls the operation of the device for creating turbulence based in part at least on the velocity of the wastewater in the grit chamber. 6. The system of claim 1, wherein the air diffuser is operatively connected to an air blower, and wherein the system includes an air temperature sensor for sensing the temperature of air directed through the diffuser at a selected location; and wherein the control unit controls sedimentation in the grit chamber based in part at least on the temperature of the air. 7. The system of claim 1, wherein the air diffuser is adapted to generate air bubbles having a diameter of less than 3 mm. 8. The system of claim 1, wherein the air diffuser includes a plurality of spaced apart air diffusers located in the reservoir and wherein adjacent air diffusers are spaced apart less than 100 mm. 9. The system of claim 1, wherein the device for creating the turbulence includes one or more air diffusers having a length, and wherein the reservoir includes a length and wherein the length of the one or more diffusers is greater than eighty percent of the length of the reservoir. 10. The system of claim 1, wherein: controlling sedimentation in the grit chamber includes allowing sand, grit and other solid particles having a size greater than a threshold size to settle in the grit chamber while maintaining sand, grit and other solid particles having a size less than the threshold size suspended in the wastewater;the system including a velocity sensor for sensing the velocity of the wastewater flowing in the grit chamber and wherein the velocity sensor is operatively connected to the control unit, and wherein the control unit controls the operation of the device for creating the turbulence based in part at least on the velocity of the wastewater in the grit chamber; andwherein the air diffuser is operatively connected to an air blower having a frequency regulated motor. 11. The system of claim 1 wherein the control unit is adapted for controlling sedimentation in the grit chamber based upon one or more of wastewater flow velocity downstream of the reservoir and air temperature upstream of the device for creating turbulence. 12. The system of claim 1 further comprising a water flow sensor for determining downstream wastewater flow velocity wherein the control unit is operatively connected to the water flow sensor for controlling sedimentation in the grit chamber by decreasing turbulence in the wastewater in response to the downstream wastewater flow velocity increasing and increasing turbulence in the wastewater in response to the downstream wastewater flow velocity decreasing. 13. The system of claim 1 further comprising an air temperature sensor for determining air temperature upstream from the device for creating turbulence and operatively connected to the control unit for controlling sedimentation in the grit chamber by increasing the turbulence of the wastewater in response to the upstream air temperature increasing and decreasing the turbulence in the wastewater in response to the upstream air temperature decreasing. 14. The system of claim 1 wherein the device for creating turbulence comprises a motor-driven blower for directing an amount of air flow from the blower to the diffuser such that air bubbles are generated through nozzles of the diffuser to provide turbulence in the wastewater. 15. The system of claim 14 wherein the controller is adapted to determine a level of turbulence in the wastewater such that sand or grit particles of sizes smaller than a specified threshold size tend to remaining suspension while particles of sizes greater than the specified threshold tend to precipitate or settle out, and wherein the controller is further adapted to determine the required amount of air flow to be directed from the blower to the diffuser and to control the blower so as to provide the required amount of air flow to the diffuser to assure the determined level of turbulence in the wastewater. 16. A method of controlling sedimentation of sand or grit particles in wastewater, comprising: directing the wastewater into a reservoir;sensing and determining the temperature of the wastewater;creating turbulence in the wastewater such that the created turbulence causes at least some of the sand or grit particles to be suspended in the wastewater; andcontrolling the sedimentation of sand or grit particles in the reservoir with a control unit by increasing the turbulence of the wastewater in response to the temperature of the wastewater increasing and decreasing the turbulence of the wastewater in response to the temperature of the wastewater decreasing;wherein the turbulence is created by an air diffuser. 17. The method of claim 16, including sensing the temperature of the wastewater in the reservoir in the vicinity of the turbulence. 18. The method of claim 16, further including determining the viscosity of the wastewater and controlling the sedimentation of sand or grit particles in the reservoir with the control unit by controlling the turbulence created in the wastewater based in part at least on the determined viscosity. 19. The method of claim 16, including sensing and determining the velocity of the wastewater flowing into or out of the reservoir, and controlling the sedimentation of sand or grit particles in the reservoir with the control unit by controlling the turbulence in the wastewater based in part at least on the determined velocity of the wastewater. 20. The method of claim 16, wherein the air diffuser is operatively connected to an air blower and is utilized to create turbulence in the wastewater and wherein the method includes determining the temperature of air directed through the diffuser or induced into the air blower; and controlling the sedimentation of sand or grit particles in the reservoir with the control unit by controlling the turbulence created in the wastewater based in part at least on the temperature of the air passing through the air diffuser or the temperature of the air induced into the blower. 21. The method of claim 16, wherein controlling the sedimentation of grit or sand particles includes creating turbulent conditions in the wastewater that results in sand or grit particles of a threshold size or greater settling and sand or grit particles of a size less than the threshold size remaining in suspension. 22. The method of claim 16, wherein creating the turbulence in the wastewater includes directing air from a blower into the air diffuser disposed in the wastewater and directing air from the diffuser into the wastewater to cause the turbulence; and varying the flow of air from the blower to the diffuser based on the temperature of the wastewater including increasing the amount of air dispersed from the diffuser if the temperature of the wastewater increases and decreasing the amount of air dispersed from the diffuser if the temperature of the water decreases. 23. The method of claim 16, including varying the turbulence in the wastewater based on the temperature of the wastewater and including increasing the turbulence in the wastewater in response to the temperature of the wastewater increasing and decreasing the turbulence in the wastewater in response to the temperature of the wastewater decreasing. 24. A system for controlling the sedimentation of sand or grit particles in wastewater, comprising: a grit chamber having a reservoir for receiving wastewater, the grit chamber having an inlet and an outlet;an air diffuser disposed in the grit chamber for dispersing air into the wastewater and generating turbulence in the wastewater;an air blower operatively connected to the diffuser for directing air into and through the diffuser;a temperature sensor associated with the grit chamber for measuring the temperature of the wastewater;a velocity sensor associated with the grit chamber for sensing the velocity of wastewater passing through the grit chamber;a control unit operatively connected to the air blower for controlling the flow of air from the air blower to the diffuser;the control unit further being operatively connected to the temperature sensor and the velocity sensor for determining the temperature of the wastewater and the velocity of wastewater passing through the grit chamber;the control unit operative to control the sedimentation of the sand or grit particles in the wastewater by controlling the air blower and the amount of air directed from the air blower to the diffuser; andwherein the control unit controls the air flow from the air blower to the diffuser: (1) as a function of the temperature of the wastewater by increasing the air flow from the air blower to the diffuser in response to the temperature of the wastewater increasing and decreasing the air flow from the air blower to the diffuser in response to the temperature of the wastewater decreasing or (2) as a function of the velocity of wastewater passing through the grit chamber. 25. The control system of claim 24, wherein the control unit controls the flow of air from the blower to the diffuser as a function of the temperature of the wastewater. 26. The system of claim 24, wherein the control unit controls the sedimentation of the sand or grit particles by: increasing the amount of air dispersed from the diffuser if the temperature of the wastewater increases and vice versa, or decreasing the amount of air dispersed by the diffuser if the velocity of the wastewater in the grit chamber increases and vice versa. 27. The system of claim 24, wherein the control unit maintains sufficient turbulence in the wastewater such that fifty percent or more of the sand and grit particles having a size greater than a threshold size settle in the grit chamber. 28. The system of claim 27, wherein the threshold size of particles is approximately 0.1 to approximately 0.5 mm, and the control unit maintains sufficient turbulence in the wastewater such that fifty percent or more of the sand or grit particles having a size greater than the threshold size settle in the grit chamber. 29. The system of claim 24, wherein the air blower includes a frequency regulated motor that is controlled by the control unit such that by controlling the frequency regulated motor, the flow of air from the blower to the diffuser is varied.
Ferland Pierre (Jonquiere CAX) Tremblay Leopold (Chicoutimi CAX) Doucet Jean (Jonquiere CAX), Process and apparatus for controlling gravity settling system.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.