Method and apparatus for continuous liquid stream blending
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01F-003/08
B01F-013/10
B01F-005/02
B01F-005/06
B01F-015/04
출원번호
US-0986569
(2007-11-21)
등록번호
US-8974111
(2015-03-10)
발명자
/ 주소
Phallen, Iver J.
출원인 / 주소
Oden Machinery, Inc.
대리인 / 주소
Thompson, John C.
인용정보
피인용 횟수 :
0인용 특허 :
2
초록▼
A method and apparatus for combining and mixing together a plurality of liquids to form a blend. The invention discloses reservoir supplied intermittently operated servo driven pumps, and optionally discrete liquid flow meters, and precise, encoded, fast-acting flow shut-off devices to create and de
A method and apparatus for combining and mixing together a plurality of liquids to form a blend. The invention discloses reservoir supplied intermittently operated servo driven pumps, and optionally discrete liquid flow meters, and precise, encoded, fast-acting flow shut-off devices to create and define repeated time synchronized ratio defined doses of the liquids. One or more liquids, designated secondary streams, are synchronously dosed into a secondary streams injection assembly which is located generally at the suction port of the primary liquid stream dosing pump. The primary stream pump, during its synchronized intermittent operation, withdraws ratio defined primary stream and secondary stream liquids from the injection assembly. The primary stream pump serves also to propel the combined liquids ratio dosed streams into and through mixing structure on the discharge of the primary stream pump. The mixed streams are then received by a final blend tank of desired capacity where blended liquids are available for use on a continuous stream or continuous flow basis, at any flow rate up to a defined maximum. The entire blender apparatus may be started at will and stopped at the completion of any given time synchronized streams ratio dose cycle.
대표청구항▼
1. A method for continuous liquid stream blending wherein two or more liquids are repeatedly synchronously ratio dosed together to form a batch or blend of desired mixture ratios or proportions, the method comprising the following: providing an encoded servo driven primary stream liquid ratio dosing
1. A method for continuous liquid stream blending wherein two or more liquids are repeatedly synchronously ratio dosed together to form a batch or blend of desired mixture ratios or proportions, the method comprising the following: providing an encoded servo driven primary stream liquid ratio dosing pump discretely and separately controllable and operable the primary stream liquid ratio dosing pump having an infeed port;providing a level controlled primary stream liquid reservoir having a bottom outfeed hydraulically connected to the infeed port of the primary stream liquid ratio dosing pump;providing one or more secondary stream liquid ratio dosing pumps, each having an encoded servo drive and an infeed port, each secondary stream dosing pump servo drive separately and discretely controllable and operable;providing a tubular hydraulic streams injector assembly hydraulically connecting the bottom outfeed to the infeed port of the primary stream ratio dosing pump, the injector assembly having liquid connections coupling an encoded secondary stream pump ratio dosing valve for each secondary stream ratio dosing pump;providing one or more level controlled secondary stream reservoirs, each having a bottom outfeed port closely connected to the infeed port of the one or more secondary stream liquid ratio dosing pump;providing a finished blended product tank having a level sensor signaling the synchronous running or stopping of all ratio dosing pumps, the finish blend product tank having sufficient capacity to receive all combined ratio doses in process when a level sensor stop signal occurs, and capable of providing a continuous outflow of ratio combined and blended liquids;providing an encoded primary stream dosing valve, mounted to the finished blended product tank and controlling the inflow of combined ratio doses from the primary stream liquid ratio dosing pump discharge into the finished blended product tank;operating the primary stream ratio dosing pump and primary stream pump ratio dosing valve simultaneously with one or more secondary ratio dosing pumps and secondary stream pump ratio dosing valves for an electronically predetermined synchronous run time to cause a liquid ratio dose from the primary stream liquid reservoir and liquid ratio doses from the secondary streams liquid reservoirs to simultaneously flow together in the streams injector assembly and then into the primary stream ratio dosing pump and to be displaced out of the primary stream ratio dosing pump and through a single inlet-single outlet liquid mixing device and then though the primary stream dosing valve and into the finished blended product tank; and defining a desired no flow off time between each successive synchronous run time. 2. The method for continuous liquid stream blending as set forth in claim 1 further characterized by the provision of sampling stations for each of the secondary streams and the primary stream whereby direct stream ratio dose sampling is possible because of the repeatable and stable back pressure produced by each stream, and because each stream back pressure is non-interactive with any other. 3. The method for continuous liquid stream blending as set forth in claim 1 wherein each ratio dosing pump can be separately and discretely controlled to establish a volumetric ratio dose. 4. The method for continuous liquid stream blending as set forth in claim 2 further characterized by the provision of a stream ratio dose sample valve associated with each sampling station. 5. The method for continuous liquid stream blending as set forth in claim 1 further characterized by the provision of one or more streams mixing means located within the streams injection assembly or downstream of the streams injection assembly but before the suction side port of the primary stream pump, the method further comprising the additional steps of operating the primary stream pump to cause flow through the streams mixing means. 6. The method for continuous liquid stream blending as set forth in claim 5 in which the operation of the streams mixing means may be established or altered independently of and without changing the operating secondary streams ratio doses. 7. The method for continuous liquid stream blending as set forth in claim 1 further characterized by the additional step of discretely and independently changing the ratio flow dose flow rate or dose size or liquid rheology or discharge pressure or configuration or size of any secondary steam as required, without altering operation of any other secondary stream. 8. The method as set forth in claim 1 wherein the streams injection assembly is tubular in flow cross section, and wherein the liquid ratio dose streams are combined synchronously at ratio matched flows within the tubular cross section of the injector assembly. 9. The method as set forth in claim 1 wherein flow of all of the ratio defined and synchronized doses through the primary stream pump contributes to the dose combining and mixing due to the mixing action of the pump. 10. The method as set forth in claim 2 wherein priming with liquids is accomplished sequentially wherein: first, each respective liquid supply reservoir is charged with liquid to the indicated maximum level of the reservoir liquid level control;second, the primary stream is primed to a fully hydraulic condition to achieve flow into the finished blend tank and also from the discharge of the primary sampling station;third, each secondary stream is primed to a hydraulic condition based upon its lumen volume until a fully hydraulic condition is achieved allowing flow into the lumen of the injector assembly and also from the secondary stream sampling station;fourth, operating all functioning ratio streams synchronously to displace ratio blended flow from the primary stream sampling station thus allowing calibration of each stream and the finished blend liquid; andfifth, synchronously ratio dose operating all functioning streams to effect displacement of correctly blended liquid into the finished blend tank; this priming and charging sequence minimizing the consumption of all constituent liquids and minimizing the volume of unblended or incorrectly blended liquid entering the finished blend tank. 11. The method as set forth in claim 1 wherein the primary and secondary ratio dose pumps are dose operated simultaneously for a predetermined and common dose time at proportionately increased flow rates or at a proportionately increased dose time to increase the stream volume or mass dose of each synchronous ratio defined digital dose for the purpose of improving the stream ratio dose repeatability expressed as a plus or minus percentage of a ratio dose sample group mean. 12. The method for continuous liquid stream blending as set forth in claim 1 further characterized by providing volumetric liquid flow meters inserted into the pump discharge flow pathway of each secondary stream and in the discharge flow pathway of the primary stream ratio dosing pump whereby volumetric ratio dose operation can be achieved. 13. An apparatus for continuous liquid stream blending wherein two or more liquids are repeatedly synchronously ratio dosed together to form a batch or blend of desired mixture ratios or proportions, the apparatus comprising the following: an encoded servo driven primary stream liquid ratio dosing pump discretely and separately controllable and operable, the primary stream liquid ratio dosing pump having an infeed port;a level controlled primary stream liquid reservoir having a bottom outfeed hydraulically connected to the infeed port of a primary stream liquid ratio dosing pump;one or more secondary stream liquid ratio dosing pumps, each having an encoded servo drive and an infeed port, each secondary stream dosing pump servo drive separately and discretely controllable and operable;a tubular hydraulic streams injector assembly hydraulically connecting the bottom outfeed to the infeed port of the primary stream ratio dosing pump, the injector assembly having liquid connections coupling an encoded secondary stream pump ratio dosing valve for each secondary stream ratio dosing pump;one or more level controlled secondary stream reservoirs, each having a bottom outfeed port closely connected to the infeed port of the one or more secondary stream liquid ratio dosing pump;a finished blended product tank having a level sensor signaling the synchronous running or stopping of all ratio dosing pumps, the finished blend tank having sufficient capacity to receive all combined ratio doses in process when a level sensor stop signal occurs, and providing a continuous outflow of ratio combined and blended liquids;an encoded primary stream dosing valve, mounted to the finished blended product tank and controlling the inflow of combined ratio doses from the primary stream liquid ratio dosing pump discharge into the finished blended product tank;electronic control apparatus for operating the primary stream ratio dosing pump and primary stream pump ratio dosing valve simultaneously with one or more secondary ratio dosing pumps and secondary stream pump ratio dosing valves for an electronically predetermined synchronous run time to cause a liquid ratio dose from the primary stream liquid reservoir and liquid ratio doses from the secondary streams liquid reservoirs to simultaneously flow together in the streams injector assembly and then into the primary stream ratio dosing pump and to be displaced out of the primary stream ratio dosing pump and through a single inlet-single outlet liquid mixing device and then though the primary stream dosing valve and into the finished blended product tank;the control apparatus also defining a desired no flow off time between each successive synchronous run time. 14. The apparatus as set forth in claim 13 further including means to independently and selectively turn the ratio dose streams on and off as desired and in any combination to alter the ratio dosed constituent streams as desired. 15. The apparatus as set forth in claim 13 further including a sampling station for each of the secondary streams and the primary stream. 16. The apparatus as set forth in claim 13 further including liquid flow meters inserted into the pump discharge flow pathway of each stream. 17. The apparatus as set forth in claim 15 further including a stream sample valve associated with each sampling station, and further including a stream injection or ratio dose valve in each liquid ratio flow dose stream, each stream sample valve being essentially identical to the corresponding stream ratio dose valve. 18. The apparatus as set forth in claim 13 wherein each reservoir is level controlled, each reservoir being proximate to each stream ratio dosing pump. 19. The apparatus as set forth in claim 18 wherein each stream liquid supply reservoir is provided with a liquid level control allowing liquid level within the reservoir to be maintained at a defined and known liquid level or within a defined and known liquid level range, thus establishing a definite and known stable liquid feed or supply pressure or pressure range to each stream pump, thus helping to assure accurate and stable operation of the apparatus for continuous liquid stream blending. 20. The apparatus as set forth in claim 13 wherein each reservoir is maintained at atmospheric pressure. 21. The apparatus as set forth in claim 13 wherein one or more streams mixing means can be located within the streams injection assembly or downstream of the streams injection assembly, but before the suction side infeed port of the primary stream ratio dose pump. 22. The apparatus as set forth in claim 13 wherein the streams injection assembly is located between the liquid supply reservoir of the primary stream and attached directly to the infeed port of the primary stream pump. 23. The apparatus as set forth in claim 13 further including a single electronic control apparatus which serves to operate and synchronize the ratio matched dose flows of all functioning streams within the apparatus for continuous liquid stream blending. 24. The apparatus as set forth in claim 13 in which a suitably sized densitometer is fitted between the outfeed port of the primary stream liquid supply reservoir before the streams injection assembly, such that all secondary stream points of injection are down-flow from the densitometer, thus allowing the density of the primary stream liquid flowing into the primary stream ratio dosing pump to be known. 25. The apparatus as set forth in claim 13 in which a liquid flow meter is located between the outflow port of the primary stream liquid supply reservoir and the streams injection assembly to allow the volume or mass ratio dose of the primary stream liquid flowing into the primary stream ratio dosing pump to be known directly with each blender synchronous ratio dose cycle. 26. The apparatus as set forth in claim 13 further characterized by the provision of a suitable densitometer located in the discharge flow pathway of the primary stream pump, distal to all streams mixing elements or apparatus, whereby the density of the blended streams can be directly measured. 27. The apparatus as set forth in claim 13 further characterized by the provision of a suitable volumetric or mass liquid flow meter located in the discharge pathway of the primary stream pump, distal to all streams mixing elements or apparatus, whereby the volume or mass of the blended streams ratio doses can be directly measured. 28. The apparatus as set forth in claim 13 further characterized by the provision of a suitable densitometer located in the flow pathway of each secondary stream pump, whereby the density of the secondary stream liquids can be directly measured. 29. The apparatus as set forth in claim 13 further characterized by the provision of a suitable volumetric or mass liquid flow meter located in the discharge pathway of each secondary stream pump, whereby the volume or mass of the secondary stream ratio doses can be directly measured. 30. The apparatus as set forth in claim 13 further characterized by the provision of a secondary stream sample valve whereby the density of a secondary flow stream liquid can be determined by weighing a known volume ratio dose collected from the secondary stream sample valve. 31. The apparatus set forth in claim 13 wherein a Coriolis mass flow meter is located in the primary stream pump discharge and distal to a streams mixing apparatus, wherein the Coriolis mass flow meter can define the total primary stream synchronous dose, and also measure, without the need for any additional apparatus, the completeness and efficacy of liquid streams blending and mixing by measuring the magnitude of density changes of the combined streams flowing through the Coriolis mass flow meter during synchronous digital flow. 32. The apparatus set forth in claim 13 further characterized by the provision of means capable of detecting air or gas inclusions in a liquid stream, generally referred to as slug flow, and means to immediately inhibit blender operation and to alarm the existence of such conditions, thereby preventing inaccurate ratio blending of constituent liquid streams. 33. The apparatus set forth in claim 13 further characterized by the provision of means to prevent operation whenever the volumetric or mass sum of the operating secondary streams ratios is equal to or greater than 100% of the blended liquids ratio formula, thus preventing the possibility of flow of secondary stream liquids into the primary stream liquid supply. 34. The apparatus as set forth in claim 16 wherein the liquid flow meters are volumetric liquid flow meters whereby volumetric ratio dose operation can be achieved. 35. The apparatus as set forth in claim 16 wherein the liquid flow meters are mass liquid flow meters whereby mass ratio dose operation can be achieved. 36. The apparatus as set forth in claim 13 further including mass liquid flow meters inserted into the pump discharge flow pathway of each secondary stream and between the outfeed port of the primary stream ratio dose liquid supply reservoir and the streams injection assembly whereby mass ratio dose operation can be achieved. 37. The apparatus as set forth in claim 13 further including volumetric liquid flow meters inserted into the pump discharge flow pathway of each secondary stream and between the outfeed port of the primary stream ratio dose liquid supply reservoir and the streams injection assembly whereby volumetric ratio dose operation can be achieved.
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이 특허에 인용된 특허 (2)
Phallen Iver J. ; Jezuit ; Jr. Richard J. ; Millett ; Jr. Peter B., Continuous liquid stream digital blending system.
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