Deposit detection in a paper making system via vibration analysis

Patent metadata

Field	Value
Publication number	US-11041271-B2
Application number	US-201816169513-A
Country	US
Kind code	B2
Filing date	Oct 24, 2018
Priority date	Oct 24, 2017
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

Vibration sensors can be used in paper making systems and methods to determine various aspects of the paper making operation. Vibration sensors, for example, positioned on cleaning blades configured to clean various deposits off of rollers in a paper making system can output vibration data that can be indicative of the vibration of the blade. The vibration data can be analyzed in order to characterize the cause of the vibration and/or the location of the vibration within a paper making system. If the vibration data satisfies a predetermined condition, a corrective action can be initiated. Different corrective actions can be initiated based on the characterized cause and/or location of the vibration in order to effectively improve the operation of the system while minimizing costly system shut downs and major maintenance.

First claim

The invention claimed is:

1. A paper making system comprising:
a plurality of guide rollers including a first guide roller;
a carrier forming a continuous surface contacting the plurality of guide rollers, the carrier having a paper side and a back side and being configured to travel in a first direction around the plurality of guide rollers during a paper making process;
a paper stock source configured to provide a paper stock to the paper side of the carrier;
a cleaning blade arranged to clean the first guide roller;
an accelerometer configured to detect vibration of the cleaning blade; and
a controller in communication with the accelerometer and configured to:
receive vibration data from the accelerometer;
analyze the received vibration data to determine a character of the vibration of the cleaning blade as indicated by the vibration data;
differentiate between a plurality of causes of the vibration of the cleaning blade based on the determined character to determine a cause of the vibration of the cleaning blade; and
if the vibration data satisfies a predetermined condition, initiate a corrective action based on the cause of the vibration of the cleaning blade.

2. The system of claim 1 , wherein:
analyzing the received vibration data comprises determining an amount of deposit on the first guide roller associated with the cleaning blade; and
the controller is configured to initiate the corrective action if the determined amount of deposit satisfies a predetermined condition.

3. The system of claim 2 , wherein the determined amount of deposit comprises a determined amount of stickies deposited on the first guide roller from the carrier.

4. The system of claim 1 , further comprising:
a second guide roller in the plurality of guide rollers;
a second cleaning blade arranged to clean the second guide roller; and
a second accelerometer in communication with the controller and configured to detect vibration of the second cleaning blade;
wherein the controller is further configured to:
receive second vibration data from the second accelerometer; and
analyze the second vibration data from the second accelerometer,
wherein the initiated corrective action is based on both the analyzed vibration data and the analyzed second vibration data.

5. The system of claim 1 , wherein the first guide roller is positioned such that, the carrier travels, in the first direction, (i) from the paper stock source to a first interface where the paper stock is transferred from the carrier to an interfacing component such that the carrier is substantially free of the paper stock as it encounters the first guide roller, (ii) from the first interface to the first guide roller, and (iii) from the first guide roller to the paper stock source.

6. The system of claim 1 , wherein the carrier comprises a felt material.

7. The system of claim 1 , further comprising a first chemical source in communication with the controller and wherein initiating the corrective action comprises changing an amount of a chemical dispensed from the first chemical source.

8. The system of claim 7 , wherein the chemical comprises one or more from the group consisting of:
water, fixitives, dispersants, surfactants, coagulants, solvents, release agents, and detackifiers.

9. The system of claim 1 , wherein initiating the corrective action comprises alerting a user of the detected vibration.

10. The system of claim 1 , wherein initiating the corrective action comprises changing the makeup of the paper stock provided by the paper stock source.

11. The system of claim 1 , further comprising:
a second cleaning blade associated with and arranged to clean a second guide roller; and
a second accelerometer coupled to and configured to detect vibration of the second cleaning blade; wherein
the controller is in communication with the second accelerometer and is configured to:
receive vibration data from the second accelerometer representative of the vibration of the second cleaning blade;
analyze the vibration data received from the second accelerometer; and
if the vibration data from the second accelerometer satisfies a predetermined condition, initiate a second corrective action.

12. The system of claim 1 , wherein analyzing the received vibration data comprises analyzing the frequency content of the received vibration data.

13. The system of claim 12 , wherein analyzing the frequency content of the received vibration data comprises determining an amount of vibration present in a plurality of frequency bands; and
the initiated corrective action is selected from a plurality of possible corrective actions based on the frequency content of the vibration data.

14. A method for addressing deposits in a paper making system comprising:
receiving vibration data from one or more accelerometers arranged to sense the vibration of a cleaning blade for cleaning a surface of a roller in the paper making system;
analyzing the received vibration data to determine a character of the vibration of the cleaning blade as indicated by the vibration data;
differentiating between a plurality of causes of the vibration of the cleaning blade based on the determined character to determine a cause of the vibration of the cleaning blade; and
if the vibration data satisfies a predetermined condition, initiating a corrective action based on the cause of the vibration of the cleaning blade.

15. The method of claim 14 , wherein analyzing the received vibration data comprises analyzing the frequency content of the received vibration data and determining an amount of vibration present in a plurality of frequency bands, and wherein the initiated corrective action is selected from a plurality of possible corrective actions based on the frequency content of the vibration data.

16. The method of claim 14 , wherein the roller is in a wet end of the paper making system.

17. The method of claim 14 , wherein initiating the corrective action comprises adjusting an amount of at least one chemical provided to the system, and wherein the at least one chemical comprises one selected from the group consisting of:
water, fixitives, dispersants, surfactants, coagulants, solvents, release agents, and detackifiers.

18. A paper making system comprising:
a plurality of rollers engaging a carrier for transporting paper stock through the system;
a cleaning blade positioned proximate a first roller in the plurality of rollers, the cleaning blade being configured to contact a surface of the first roller so that, as the first roller rotates, the surface of the first roller scrapes against the cleaning blade;
an accelerometer positioned relative to the cleaning blade so that the accelerometer detects vibrations of the cleaning blade as the cleaning blade contacts the surface of the first roller; and
a controller in communication with the accelerometer, the controller being configured to:
receive vibration data from the accelerometer;
differentiate between a plurality of causes of the vibration of the cleaning blade based on a character of the vibration of the cleaning blade, as indicated by the vibration data, to determine a cause of the vibration of the cleaning blade; and
if the received vibration data from the accelerometer satisfies a predetermined condition, initiating a corrective action based on the cause of the vibration of the cleaning blade.

19. The paper making system of claim 18 , wherein the accelerometer is positioned on the cleaning blade or a cleaning blade holder configured to support the

Assignees

• Ecolab Usa Inc

Inventors

• Luneau Dominic
• Moukannas Fouad M
• Furman Gary S
• Weinstein David I
• Von Drasek William

Classifications

• D21G3/005

  Doctor knifes · CPC title

• D21G9/0027

  controlling the forming section · CPC title

• D21F1/32 Primary

  Washing wire-cloths or felts · CPC title

• G01N33/343 Primary

  Paper pulp · CPC title

• D21G3/04

  for drying cylinders · CPC title