Device and method for monitoring biocide dosing in a machine

• US 9,341,560 B2
• Filed: 01/21/2013
• Issued: 05/17/2016
• Est. Priority Date: 01/20/2012
• Status: Active Grant

• Current Assignee: Kemira Oyj
• Original Assignee: Kemira Oyj
• Inventors: Sirvio, Jukka-Pekka, Kolari, Marko, Suhonen, Tuija, Joensuu, Iiris
• Primary Examiner(s): FORTUNA, JOSE A
• Application Number:
  US14/373,236
• Publication Number:
  US 20150000853A1
• Time in Patent Office: 1,212 Days
• Field of Search: 162/198, 162/199, 162160-161, 162/252, 700127-129
• US Class Current: 1/1
• CPC Class Codes: D21H 21/04 Slime-control agents
• CPC Class Codes: D21H 21/36 Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents
• CPC Class Codes: D21H 23/20 Apparatus therefor
• CPC Class Codes: G01N 17/04 Corrosion probes
• CPC Class Codes: G01N 27/041 of a solid body

Abstract

Embodiments of the present disclosure include methods to control the quantity of vapor phase corrosion, devices, and the like.

Claims

1. A method for monitoring the vapor phase corrosion in a paper or board machine, comprising:

obtaining, using a modified electrical resistance (ER) probe equipped with an ER probe and a cooling unit disposed around the ER probe, information regarding the rate of vapor phase corrosion over a time period; and

using the information to determine how to adjust the dosing of an oxidizing biocide in a paper or board making process

and

adjusting the amount of the oxidizing biocide based on the information obtained regarding vapor phase corrosion.

2. The method of claim 1, wherein the information is obtained using a temperature measurement sensor to measure the temperature of one or more of the following:

the ER probe, the air around the ER probe, or the air outside of the ER probe.

3. The method of claim 2, further comprising:

controlling the temperature difference between the air outside of the modified ER probe and the surface of the ER probe.

4. The method of claim 1, further comprising:

adjusting the amount of the oxidizing biocide based on the information obtained regarding vapor phase corrosion.

5. The method of claim 1, wherein obtaining includes measuring an electrical resistance of an element in the modified ER probe.

6. The method of claim 5, wherein an increase in the electrical resistance of the element over a time period indicates that the element was undergone reduction, and wherein a rate of corrosion is determined from the reduction of the element over the time period.

7. A method of claim 1, wherein

obtaining information regarding the rate of vapor phase corrosion over a time period is by a computing device;

and

using the information to determine how to adjust the dosing of an oxidizing biocide in a paper or board making process is by a computing device.

8. The method of claim 7, further comprising:

adjusting, by the computing device, the amount of the oxidizing biocide based on the information obtained regarding vapor phase corrosion.

9. The method of claim 8, wherein obtaining includes measuring, by the computing device, an electrical resistance of an element in a modified ER probe.

10. The method of claim 8, further comprising:

controlling, by a computing device, the temperature difference between the air outside of a modified ER probe and a surface of an ER probe.