[특허]Level detector for measuring foam and aerated slurry level in a wet flue gas desulfurization absorber tower

Level detector for measuring foam and aerated slurry level in a wet flue gas desulfurization absorber tower 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01F-023/00
출원번호	US-0232249 (2011-09-14)
등록번호	US-8756992 (2014-06-24)
발명자 / 주소	Bogdanchik, Peter J.
출원인 / 주소	ALSTOM Technology Ltd
대리인 / 주소	Vacca, Rita D.
인용정보	피인용 횟수 : 0 인용 특허 : 31

초록 ▼

A level detector 100 includes a sleeve 210 mountable to a vessel and extendable through a wall 212 defined by the vessel 212A and into an interior area 214 defined by the vessel. The sleeve 210 is mountable at an angle A of less than forty-five degrees relative to the vessel wall 212. The level detector 100 includes a level sensing probe 230 extending into a bore defined by an inside surface 218 of the sleeve 210. The level sensing probe 230 is configured to measure a plurality of foam and aerated slurry levels in the vessel 212A. One or more connectors 232, 244 are positioned outside 212B of the vessel 212A to removably support the level sensing probe 230 within the bore. The level sensing probe 230 is in communication with the interior area 214 via one or more openings 254, 258 extending into the bore.

대표청구항 ▼

1. A foam and aerated slurry level detector comprising: a sleeve mountable to a vessel and extendable through a wall defined by the vessel into an interior area defined by the vessel, the sleeve being mountable at an angle of less than forty-five degrees relative to the wall defined by the vessel;a level sensing probe configured to measure a plurality of foam and aerated slurry levels in the vessel, to extend into a bore defined by an inside surface of the sleeve, and to communicate with the interior area via at least one opening in the sleeve which extends into the bore;at least one connector positioned outside of the vessel and configured to removably support the level sensing probe within the bore;a liquid level sensor mounted to the vessel and extended through the wall into the interior area of the vessel to measure liquid level; anda comparator module in communication with the liquid level sensor and the level sensing probe to determine a foam and aerated slurry level by subtracting a liquid level measured generated by the liquid level sensor, from another level measurement generated by the level sensing probe. 2. The level detector of claim 1, wherein the at least one connector and the level sensing probe are operable to enable the level sensing probe to be installed and removed from the sleeve from a position external to the vessel without requiring access to the interior area. 3. The level detector of claim 1, wherein the level sensing probe defines a stiffness such that the level sensing probe is spaced away from the inside surface of the sleeve. 4. The level detector of claim 1, wherein the level sensing probe is configured to operate in a wet flue gas desulfurization absorber tower at a temperature of about 135 to about 145 degrees Fahrenheit. 5. The level detector of claim 1, wherein the level sensing probe is about 7 to 20 feet in length. 6. The level detector of claim 1, wherein the level sensing probe includes a corrosion resistant coating disposed thereon. 7. The level detector of claim 1, wherein the level sensing probe is a radio frequency admittance probe. 8. The level detector of claim 7, wherein the radio frequency admittance probe is configured to employ a radio frequency signal and is configured to measure capacitance and resistance of material disposed between the radio frequency admittance probe and the wall. 9. The level detector of claim 1, wherein the at least one connector comprises a first flange secured to the sleeve and a second flange secured to the level sensing probe and wherein the first and second flanges are removably connected to one another. 10. The level detector of claim 1, wherein the sleeve is mountable at an angle of about 14 degrees to about 16 degrees, relative to the vessel wall. 11. The level detector of claim 1, wherein the level sensing probe is mountable and operable at an angle of about 14 degrees to about 16 degrees, relative to vessel wall. 12. The level detector of claim 1, wherein the sleeve and the level sensing probe extend from the wall towards a bottom portion of the vessel. 13. The level detector of claim 1, wherein the sleeve comprises a mounting portion secured to the wall and a measuring portion removably connected to the mounting portion inside the vessel, the mounting portion being a metallic material and the measuring portion being configured to allow slurry, aerated slurry and foam to come into contact with the level sensing probe. 14. The level detector of claim 13, wherein the measuring portion is manufactured from plastic or other non-metallic material. 15. The level detector of claim 13, wherein the measuring portion includes a plurality of passages extending therethrough. 16. The level detector of claim 1, wherein the comparator module includes an algorithm configured to generate a foam and aerated slurry level measurement by subtracting a liquid level measurement generated by the liquid level sensor, from another level measurement generated by the level sensing probe. 17. The level detector of claim 1, wherein the level sensing probe is spaced away from the inside surface of the sleeve and is positioned substantially concentric within the bore. 18. The level detector of claim 1, wherein the level sensing probe is a guided wave radar probe. 19. A method for detecting foam and aerated slurry in a vessel comprising: using a level sensing probe installed into a bore defined by an inside surface of a sleeve mounted to a vessel to extend through a wall defined by the vessel into an interior area of the vessel with the sleeve mounted at an angle of less than forty-five degrees relative to the wall defined by the vessel, to measure liquid, foam and aerated slurry level;using a liquid level sensor mounted to the vessel and extended through the wall into the interior area of the vessel, to measure liquid level; andusing a comparator module in communication with the liquid level sensor and the level sensing probe to determine a foam and aerated slurry level by subtracting a liquid level measurement generated by the liquid level sensor, from another level measurement generated by the level sensing probe.

이 특허에 인용된 특허 (31)

Maltby Frederick L. (Jenkintown PA) Kramer Jonathan (Warminster PA) Loewenstern Kenneth M. (Warminster PA), Admittance measuring system for monitoring the condition of materials.
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Maltby Frederick L. (Jenkintown PA) Kramer L. Jonathan (Warminster PA), Admittance sensing probe having multiple sensing elements.
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Brenner Raul ; Esin Alex J. ; Jones Lawrence J. ; Rosselson Boris, Capacitance level sensor.
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Winkens,Frank; Frank,Wolfgang, Capacitance sensor for detecting the fill level of a medium in a container.
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Fasching George E. (Morgantown WV) Utt Carroll E. (Morgantown WV), Capacitance-level/density monitor for fluidized-bed combustor.
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Kemp William H. (Clayton CAX) Shideler Victor J. (Carleton CAX), Carrier frequency sensing of fluids in vessels.
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Ishikawa Yoichi (Tokyo JPX), Detection of the surface of a liquid or foam including moisture inhibiting.
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Maltby Frederick L. (Jenkintown PA) Kramer L. Jonathan (Warminster PA), Fail-safe instrument system.
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Bond ; Jr. Charles R. (2241 Boston ; SE. Grand Rapids MI 49506), Fluid level indicating apparatus.
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Mouch Richard J. (Batavia IL) Lin Mei-Jan L. (Naperville IL), Fly ash utilization in flue gas desulfurization.
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Park Kyong M. ; Nguyen Nhan, High-sensitivity capacitive oil deterioration and level sensor.
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Wright William S. (Dublin PA) Loewenstern Kenneth M. (Warminster PA), Level measuring system using admittance sensing.
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Zatler Andrej (Askerceva 24 ; 62000 Maribor SIX) Eferl Franc (Pri sli 45 ; 62351 Kamnica SIX), Level switch.
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Sasaki,Hisashi; Motomura,Masayuki, Liquid level detection apparatus.
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Stehman, Nathan A.; Snyder, Jr., Andrew K.; Doyle, Shawn P., Liquid level sensing device.
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Aldrich Joe L. (Kingwood TX), Material level detector and control.
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Kurt C. Diede, Measurement of process product dielectric constant using a low power radar level transmitter.
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Fleckenstein Phillip P. (Port Huron MI), Method of manufacturing capacitance-type material level indicator probe.
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Hammer, Erling, Methods and devices for measuring interface levels between fluids, and uses thereof.
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McEwan Thomas E., Micropower RF material proximity sensor.
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Diede Kurt C. ; Richter Brian E., Multiple process product interface detection for a low power radar level transmitter.
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Russell Craig A. (Elburn IL), Radio frequency capacitance probe system for material detection.
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Maltby Frederick (Jenkintown PA) Hall Richard G. (Warminster PA) Kramer Jonathan L. (Warminster PA) Hoopes Howard S. (Hatfield PA) Petersen Steven R. (Ambler PA), Remotely calibratable instrument system.
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Maltby Frederick L. (Jenkintown PA) Hall Richard G. (Warminster PA) Kramer Jonathan L. (Warminster PA) Hoopes Howard S. (Hatfield PA) Petersen Steven R. (Ambler PA), Remotely calibratable instrument system.
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Edvardsson,Olov, Two-mode radar level gauge system.
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Spillman, Jr., William Bert; Massimo, Maurizio, Volume measurement system and method for volume element counting.
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Level detector for measuring foam and aerated slurry level in a wet flue gas desulfurization absorber tower 원문보기

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