Gas blanket management system and method

• US 20040046670A1
• Filed: 09/05/2002
• Published: 03/11/2004
• Est. Priority Date: 09/05/2002
• Status: Abandoned Application

• Current Assignee: Fisher Controls International LLC (Emerson Electric Company)
• Original Assignee: Fisher Controls International LLC (Emerson Electric Company)
• Inventors: Grumstrup, Bruce F., Adams, Paul R.
• Application Number:
  US10/235,470
• Publication Number:
  US 20040046670A1
• Time in Patent Office: Days
• US Class Current: 340/605
• CPC Class Codes: B65D 90/44 by use of inert gas for filling space above liquid or between contents
• CPC Class Codes: G05D 27/02 characterised by the use of electric means

Abstract

A storage tank monitoring system may include a stored media sensor adapted to sense a storage tank media parameter which may responsively generate a stored media signal, a blanket gas sensor adapted to sense a storage tank blanket gas parameter which may responsively generate a blanket gas signal, and a blanket gas flow sensor adapted to sense the flow of blanket gas which may responsively generate a blanket gas flow signal. The storage tank system may further include a controller unit adapted to receive at least one of the stored media signal and the blanket gas signal, and the blanket gas flow signal, and responsively generate a blanket gas leak indicator signal. As such, a blanket gas leak indicator includes at least one of a first and a second state wherein the first state is indicative of a blanket gas leak and the second state is indicative of no blanket gas leaks.

Claims

1. A storage tank monitoring system comprising:

a blanket gas flow control device adapted to control the flow of a blanket gas wherein the blanket gas flow control device includes a blanket gas flow sensor adapted to sense the flow of the blanket gas and responsively generate a blanket gas flow signal;

at least one of a stored media sensor and a blanket gas sensor adapted to sense one of a stored media and a blanket gas parameter and responsively generate one of a stored media and a blanket gas sensor signal; and

a controller unit adapted to receive the blanket gas flow signal and one of the stored media signal and the blanket gas signal and responsively generate a control device signal.

2. The storage tank monitoring system of claim 1, wherein the control device signal includes at least one of a first and a second state wherein the first state is indicative of a blanket gas leak and the second state is indicative of no blanket gas leaks.

3. The storage tank monitoring system of claim 1, wherein the stored media sensor is adapted to sense a tank level of a stored media in the storage tank.

4. The storage tank monitoring system of claim 1, wherein the stored media sensor comprises a pressure sensor.

5. The storage tank monitoring system of claim 1, wherein the stored media sensor comprises a float valve.

6. The storage tank monitoring system of claim 1, wherein the stored media sensor comprises an inflow sensor adapted to sense an inflow of media into the storage tank and an outflow sensor adapted to sense an outflow of media from the storage tank.

7. The storage tank monitoring system of claim 1, wherein the blanket gas sensor comprises an inlet pressure tap, an outlet pressure tap, and a travel sensor.

8. The storage tank monitoring system of claim 1, further including an alarm unit that is responsive to the control device signal.

9. The storage tank monitoring system of claim 1, wherein the blanket gas sensor is adapted to sense the outflow of the blanket gas into a blanket gas recovery system and responsively generate a second blanket gas sensor signal.

10. The storage tank monitoring system of claim 9, wherein the controller unit is adapted to further receive the second blanket gas signal and responsively generate a leak indicator signal.

11. The storage tank monitoring system of claim 1, further including a tank temperature sensor adapted to sense a tank temperature and generate a tank temperature sensor signal.

12. The storage tank monitoring system of claim 1, wherein the stored media signal is tagged with a unique storage tank specific tag.

13. The storage tank monitoring system of claim 1, wherein the blanket gas signal is tagged with a unique storage tank specific tag.

14. The storage tank monitoring system of claim 1, wherein the blanket gas flow signal is tagged with a unique storage tank specific tag.

15. The storage tank monitoring system of claim 1, wherein the controller unit is disposed in a location remote from the storage tank and is communicatively coupled to the blanket gas flow sensor and one of the stored media sensor and the blanket gas sensor via one of a hardline, a radio device and a transceiver.

16. The storage tank monitoring system of claim 1, wherein the controller unit is communicatively coupled to a central monitoring unit via one of a hardline, a radio device and a transceiver.

17. The storage tank monitoring system of claim 1, wherein the controller unit is communicatively coupled to a global network of computers.

18. The storage tank monitoring system of claim 17, wherein the global network of computers comprises the Internet.

19. The storage tank monitoring system of claim 1, further including a sensor for sensing heat tracing performance.

20. The storage tank monitoring system of claim 1, further including a local communication module for permitting the retrieval of sensor data locally.

21. A storage tank monitoring system comprising:

a blanket gas flow control device adapted to control the flow of a blanket gas wherein the blanket gas flow control device includes a blanket gas flow sensor adapted to sense the flow of the blanket gas and responsively generate a blanket gas flow signal;

a stored media sensor adapted to sense a level of a stored media in a storage tank and responsively generate a stored media sensor signal; and

a controller unit adapted to receive the stored media sensor signal and the blanket gas flow signal and responsively generate a control device signal.

22. A storage tank monitoring system comprising:

a blanket gas flow control device adapted to control the flow of a blanket gas wherein the blanket gas flow control device includes a blanket gas flow sensor adapted to sense the flow of the blanket gas and responsively generate a blanket gas flow signal;

at least one of a stored media sensor and a blanket gas sensor adapted to sense one of a stored media parameter and a blanket gas parameter and responsively generate one of a stored media sensor signal and a blanket gas sensor signal; and

a controller unit adapted to receive the blanket gas flow signal and one of the stored media signal and the blanket gas signal and responsively generate a control device signal, wherein the control device signal includes at least one of a first and a second state wherein the first state is indicative of a blanket gas leak and the second state is indicative of no blanket gas leaks.

23. A method of monitoring a storage tank, the method comprising:

providing a blanket gas flow control device adapted to control the flow of a blanket gas wherein the blanket gas flow control device includes a blanket gas flow sensor;

sensing a flow of blanket gas into a storage tank;

responsively generating a blanket gas flow sensor signal;

sensing one of a stored media parameter and blanket gas parameter;

responsively generating one of a stored media sensor signal and blanket gas sensor signal;

receiving the blanket gas flow sensor signal and one of the stored media sensor signal and the blanket gas sensor signal as inputs; and

responsively generating a control device signal.

24. The method of claim 23, wherein the control device signal includes one of a first and a second state wherein the first state is indicative of a blanket gas leak and the second state is indicative of no blanket gas leaks.

25. The method of claim 23, wherein sensing the storage tank media parameter further includes sensing a level of the stored media in the storage tank.

26. The method of claim 23, wherein sensing the storage tank media parameter further includes sensing an inflow of media into the storage tank and sensing an outflow of media from the storage tank.

27. The method of claim 24, further including generating an alarm when the gas device signal is placed in a first state.

28. The method of claim 23, wherein the blanket gas flow sensor signal is a first blanket gas sensor signal, and wherein the blanket gas parameter is an outflow of blanket gas into a blanket gas recovery system.

29. The method of claim 28, further including receiving the second blanket gas sensor signal and responsively generating the device signal.

30. The method of claim 23, further including sensing a tank temperature and generating a tank temperature sensor signal.

31. The method of claim 23, further including tagging the stored media sensor signal with a unique storage tank specific tag.

32. The method of claim 23, further including tagging the blanket gas sensor signal with a unique storage tank specific tag.

33. The method of claim 23, further including tagging the control device signal with a unique storage tank specific tag.

34. The method of claim 23, further including communicatively coupling the controller unit to the blanket gas flow sensor and one of the stored media sensor and the blanket gas sensor, via one of a hardline, a radio device and a transceiver.

35. The method of claim 23, further including communicatively coupling the controller unit to a global network of computers.

36. The method of claim 35, wherein the global network of computers comprises the Internet.

37. The method of claim 23, further including sensing heat tracing performance.

38. The method of claim 23, further including communicating the sensor data to a local communication module.

39. The method of claim 23, further providing a controller unit to receive the blanket gas flow sensor signal and one of the stored media sensor signal and the blanket gas sensor signal, and to generate the control device signal.

40. A blanket gas monitoring system for a plurality of storage tanks, the blanket gas monitoring system comprising:

a plurality of blanket gas flow control devices adapted to control the flow of a blanket gas wherein the blanket gas flow control devices include a blanket gas flow sensor adapted to sense the flow of the blanket gas and responsively generate a blanket gas flow signals;

one of a plurality of stored media sensors and a plurality of blanket gas sensors wherein each of the one of the plurality of stored media sensors and the plurality of blanket gas sensors is adapted to sense one of a stored media parameter and a blanket gas parameter of a respective storage tank; and

a controller unit adapted to receive the blanket gas flow signals and one of the plurality of stored media signals and blanket gas signals for each of the plurality of storage tanks and responsively generate a storage tank device signal for each of the plurality of storage tanks.