Method and system for monitoring and controlling a filtration process

• US 5,492,632 A
• Filed: 09/23/1994
• Issued: 02/20/1996
• Est. Priority Date: 09/23/1994
• Status: Expired due to Fees

• Current Assignee: William Reber LLC
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Reber, William L.
• Primary Examiner(s): Drodge, Joseph W.
• Application Number:
  US08/311,305
• Time in Patent Office: 515 Days
• Field of Search: 364/401, 364/406, 210/85, 210/87, 210/96.1, 210/97, 210/143, 210/400, 210/401, 210/739, 210/742, 210/770, 210/194, 210/196, 210/780, 210/783, 210/805
• US Class Current: 210/739
• CPC Class Codes: B01D 37/04 Controlling the filtration
• CPC Class Codes: B01D 37/043 by flow measuring
• CPC Class Codes: B01D 37/045 by level measuring

Abstract

A method and apparatus for creating a filtration knowledge base is used in a filtration process for separating a liquid component and a solid component from a slurry. The concentrations of the solid component in the slurry, and of the solid component in the separated liquid, are monitored and stored in a knowledge base along with a quantity relating to the amount of filtering. The knowledge base can be used for controlling the slurry-producing process, routing the separated liquid, automated billing and automated compliance reporting.

Claims

1. In a cross-flow filtration process receiving a slurry from a slurry-producing process having at least one parameter, the slurry having a liquid component and a solid component, the filtration process acting to separate the solid component of the slurry and the liquid component of the slurry, a method for creating a filtration knowledge base, the method comprising the steps of:

monitoring a concentration of the solid component in the slurry using a first sensor having an output;

generating a first signal based on the output of the first sensor;

monitoring a concentration of the solid component in the separated liquid component using a second sensor having an output;

generating a second signal based on the output of the second sensor;

monitoring a quantity relating to an amount of filtering performed using a third sensor;

generating a third signal based on the output of the third sensor;

storing values of the first signal, the second signal and the third signal in a knowledge base; and

automatically routing the separated liquid component based on the stored value of the second signal in the knowledge base.

2. The method of claim 1 wherein the step of storing includes recording the values of the first signal, the second signal and the third signal at a plurality of discrete times.

3. The method of claim 1 wherein the quantity relating to the amount of filtering performed is based on at least one of:

an amount of flow of slurry into the filtration process, an amount of flow of liquid component from the filtration process, and an amount of solid component separated from the filtration process.

4. The method of claim 1 further comprising the step of:

creating a record based on at one least value of the third signal stored in the knowledge base.

5. The method of claim 4 further comprising the step of:

transmitting the record to a station.

6. The method of claim 5 wherein the step of transmitting includes transmission of the record over a telephone line.

7. The method of claim 5 wherein the step of transmitting includes transmission of the record over an RF link.

8. The method of claim 1 further comprising the step of:

creating a compliance record by comparing the stored value of the second signal in the knowledge base to a compliance value.

9. The method of claim 8 further comprising the step of:

transmitting the compliance record to a central compliance station.

10. The method of claim 1 further comprising the step of:

generating a control record by comparing the stored value of the first signal to a control value.

11. The method of claim 10 further comprising the step of:

controlling at least one parameter of the slurry-producing process based on the control record.

12. The method of claim 1 wherein the step of routing includes routing the separated component for further filtration.

13. In a cross-flow filtration process receiving a slurry from a slurry-producing process having at least one parameter, the slurry having a liquid component and a solid component, the filtration process acting to separate the solid component of the slurry and the liquid component of the slurry, a system for filtering a slurry by cross-flow filtration while creating a filtration knowledge base, the system comprising:

means for separating a slurry by cross-flow filtration into a liquid component and a solid component;

a first sensor operable for monitoring a concentration of the solid component in the slurry and for generating a first signal based on the monitored concentration of the solid component in the slurry;

a second sensor operable for monitoring a concentration of the solid component in the separated liquid component and for generating a second signal based on the concentration of the solid component in the separated liquid component;

a third sensor operable for monitoring a quantity relating to an amount of filtering performed and for generating a third signal based on the monitored amount of filtering performed;

a knowledge base operable for storing values of the first signal, the second signal and the third signal; and

a router, coupled to the knowledge base, operable to automatically route the separated liquid component in response to the stored value of the second signal in the knowledge base.

14. The system of claim 13 wherein the knowledge base records the values of the first signal, the second signal and the third signal at a plurality of discrete times.

15. The system of claim 13 wherein the quantity relating to the amount of filtering performed is based on at least one of:

an amount of flow of slurry into the filtration process, an amount of flow of liquid component from the filtration process, and an amount of solid component separated from the filtration process.

16. The system of claim 13 further comprising:

means coupled to the knowledge base for creating a record based on at least one value of the third signal stored in the knowledge base.

17. The system of claim 16 wherein the means for creating a record further includes a transmitter for transmitting the record to a station.

18. The system of claim 17 wherein the transmitter transmits the record over a telephone line.

19. The system of claim 17 wherein the transmitter transmits the record over an RF link.

20. The system of claim 13 further comprising:

a compliance reporter, coupled to the knowledge base, for creating a compliance record based on a comparison of a stored value of the second signal in the knowledge base and a compliance value.

21. The system of claim 20 wherein the compliance reporter includes a transmitter for transmitting the compliance record to a central compliance station.

22. The system of claim 13 wherein the knowledge base includes means for generating a control record by comparing a stored value of the first signal to a control value.

23. The system of claim 22 further comprising:

a controller, coupled to the knowledge base, for controlling at least one parameter of the slurry-producing process based on the control record.

24. The system of claim 13 wherein the router routes the separated liquid for further filtration.