[특허]System and methods for monitoring leaks in underground storage tanks

System and methods for monitoring leaks in underground storage tanks 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01N-001/40 G01M-003/20 G01N-030/12 G01N-027/16
출원번호	US-0084267 (2016-03-29)
등록번호	US-9841344 (2017-12-12)
발명자 / 주소	Rabb, David M. Huey, Kenneth H.
출원인 / 주소	LEAK DETECTION TECHNOLOGIES, INC.
대리인 / 주소	Hayes Soloway P.C.
인용정보	피인용 횟수 : 0 인용 특허 : 58

초록 ▼

Leak detection system and method for monitoring leaks in underground and aboveground storage tanks, pipelines or other containments, including single, double or triple wall containments are provided. A leak detection apparatus includes an oxidation chamber, a chemical marker concentrator, a mass spectrometer (MS) ion trap and a scroll vacuum pump. Vapor samples carrying marker chemicals introduced into a tank, pipeline, or other containment are injected at sample injection point into an oxidation chamber. Oxygen from an oxygen source is fed into oxidation chamber to destroy or oxidize contaminates such as hydrocarbons in the vapor without destroying or oxidizing the chemical markers. Effluent from the oxidation chamber is passed to an elongate conduit with a metal foil or screen suspended within the conduit. The marker chemicals are attracted by a chemical coating on the foil/screen and released by heating the metal. The released marker chemicals are fed into a mass spec ion trap for leakage analysis and results.

대표청구항 ▼

1. A method for monitoring leaks in underground or aboveground containments, the method comprising: receiving at an oxidation chamber vapor samples taken from the area surrounding an underground or aboveground containment or from an air collection pipe positioned in a vicinity of underground tanks or containments, wherein said vapor sample may contain hydrocarbon and other contaminates and marker chemicals added within the underground or aboveground containment;feeding oxygen into the oxidation chamber to create an oxygen atmosphere to absorb or destroy contaminates within the vapor samples;passing effluent from the oxidation chamber to a chemical marker concentrator with a metal foil or metal screen suspended within an elongate conduit of chemical marker concentrator, the metal foil having a chemical coating to attract and hold the marker chemicals;heating the metal foil to release the marker compound attracted on the foil; andfeeding the released marker chemicals into a mass spectrometer (MS) ion trap to analyze for the presence of the marker chemicals and output a leakage analysis result. 2. The method of claim 1 wherein the oxidation chamber further comprises a dry chemical to absorb or destroy the hydrocarbon contaminates or other products leaked from the containment. 3. The method of claim 2 wherein the dry chemical is selected from the group consisting of palladium, platinum and rhodium. 4. The method of claim 2 wherein the chemical coating is selected from the group consisting of carbon molecular sieve, graphitized carbon black, spherical graphitized polymer carbon, graphitized carbon black, and carbon black material. 5. The method of claim 1 wherein the oxidation chamber is heated to a predetermined temperature by a heating element. 6. The method of claim 1 wherein the metal foil or metal screen is made of steel. 7. The method of claim 1 wherein the marker chemicals are halogenated compounds. 8. The method of claim 1 wherein the chemical marker concentrator is coupled to a vacuum pump to maintain low atmosphere environment. 9. The method of claim 1 wherein the vacuum pump is a scroll vacuum pump. 10. An apparatus for monitoring leaks in aboveground and underground storage tanks and pipeline containments, the apparatus comprising: an oxidation chamber to receive vapor samples taken from an area surrounding the containment or samples taken from an air collection pipe positioned in vicinity of the containment, wherein the vapor sample may contain hydrocarbon or other contaminates and marker chemicals added to the containment, the hydrocarbons being absorbed or destroyed within the vapor samples;a chemical marker concentrator to receive effluent from the oxidation chamber, the chemical marker concentrator comprising an elongate conduit with a metal foil suspended within the conduit, the metal foil having a chemical coating to attract the marker chemicals, the metal foil being heated to periodically release the marker chemicals attracted on the foil; anda mass spectrometer (MS) ion trap to receive the released marker chemicals to analyze for the presence of the marker chemicals by measuring for their molecular weight for each chemical marker and to determine an amount of the marker chemicals and output an leakage analysis result. 11. The apparatus of claim 10 wherein the oxidation chamber further comprises a dry chemical to absorb or destroy hydrocarbons. 12. The apparatus of claim 10 wherein the dry chemical is selected from the group consisting of palladium, rhodium and platinum. 13. The apparatus of claim 10 wherein the oxidation chamber further comprises a heating element to a predetermined temperature. 14. The apparatus of claim 10 wherein the chemical marker concentrator is a metal foil or metal screen. 15. The apparatus of claim 10 wherein the marker chemicals are halogenated compounds. 16. The apparatus of claim 10 wherein the chemical marker concentrator is coupled to a vacuum pump to maintain a vacuum operation environment. 17. The apparatus of claim 16 wherein the vacuum pump is a scroll vacuum pump. 18. A non-transitory computer-readable medium or media comprising one or more sequences of instructions which, when executed by one or more microprocessors, causes the steps to be performed comprising: receiving at an oxidation chamber vapor samples taken from an air collection pipe positioned in vicinity of an underground or aboveground containment, wherein the vapor sample may contain hydrocarbon and other contaminates and marker chemicals added to the containment;feeding oxygen into the oxidation chamber at a predetermined flow rate to create an oxygen atmosphere and heating the oxidation chamber at a predetermined temperature to absorb or destroy the hydrocarbon contaminates within the vapor samples;passing effluent from the oxidation chamber to a chemical marker concentrator with a metal foil or metal screen suspended within an elongate conduit of chemical marker concentrator, the metal foil having a chemical coating to attract and hold the marker chemicals and being heated to periodically release the marker compound attracted on the foil with a predetermined period; andreceiving the released marker chemicals at a mass spectrometer (MS) ion trap to analyze for the presence of the marker chemicals by measuring for their molecular weight for each chemical marker output an leakage analysis result. 19. The non-transitory computer-readable medium or media of claim 18 wherein the oxidation chamber comprises a dry chemical to absorb or destroy the hydrocarbons. 20. The non-transitory computer-readable medium or media of claim 18 wherein the chemical marker concentrator is coupled to a vacuum pump to maintain a predetermined vacuum degree.

이 특허에 인용된 특허 (58)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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System and methods for monitoring leaks in underground storage tanks 원문보기

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System and methods for monitoring leaks in underground storage tanks 원문보기

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