Online automatic cleaning device of pH electrode and control method

An automatic cleaning and electrode technology, which is applied in the direction of electrical program control, program control in sequence/logic controller, electrochemical variables of materials, etc., can solve the problems of short effective life of electrodes, impact, and large maintenance, and achieve reduction Effects of contaminated time, increased service life, and reduced maintenance workload and maintenance costs

Inactive Publication Date: 2013-09-18
SHENYANG ZKWELL CORROSION CONTROL TECH
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  • Description
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AI Technical Summary

Problems solved by technology

However, since the pollution of pH electrodes has become the main bottleneck for the effective promotion of pH online monitoring technology and closed-loop control technology, the sewage in the refining and chemical industry contains sulfide, salt, oil and other components that can pollute the electrodes. Uninterrupted contact results in a short effective life of the electrode and a large amount of maintenance, which seriously affects the promotion of pH online monitoring technology and closed-loop control technology

Method used

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  • Online automatic cleaning device of pH electrode and control method
  • Online automatic cleaning device of pH electrode and control method
  • Online automatic cleaning device of pH electrode and control method

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Embodiment Construction

[0029] pH electrode online automatic cleaning device, including pH electrode 1, electrode retractable carrier 2, cleaning chamber 3, interface 4, measured medium pipeline 5 and cylinder 6, between pH electrode 1 and electrode retractable carrier 2 is NPT pipe thread Fixed connection, the electrode telescopic carrier 2 is provided with 3 piston rod sealing rings 7, the rear part of the interface 4 is fixedly connected with the measured medium pipeline 5, and the front part of the interface 4 is fixedly connected with the rear part of the cleaning chamber 3. The front part of the cavity 3 is plugged with the electrode telescopic carrier 2, and the electrode telescopic carrier 2 can slide in the cleaning cavity 3. The cleaning cavity 3 is radially and vertically opened with two flushing ports 8. The two flushing ports 8 are in the maintenance state. Opposite to the radial opening of the carrier, a piston sealing ring 9 is installed on the outside of the cleaning chamber 3, and thr...

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Abstract

The invention relates to a method capable of controlling timing or separating a pH electrode from a measured medium in an online way under pressure without leakage at any time through a program and capable of automatically cleaning and maintaining. The pH electrode is enabled to be in contact with a measured medium only when the pH electrode needs to be measured, the pH electrode is automatically switched to a cleaning chamber for automatic cleaning and maintenance after the measurement is completed so as to shorten the contaminated time of the electrode, so that the electrode is in a maintenance state at most of the time, the service life of the pH electrode can be greatly prolonged, and meanwhile the labor maintenance amount is reduced. According to the method, on-site compressed air is adopted as an electrode expanding power source, a 36V direct current power supply is adopted as a control system power supply; a cleaning and control system is integrally mounted; control parameters can be remotely set; and the online automatic cleaning device is simple and practical, and is convenient for a user to use and maintain.

Description

technical field [0001] The invention relates to an on-line automatic cleaning technology of pH electrodes in the on-line monitoring technology of the pH value of sewage in the field of corrosion and protection of petrochemical industry, in particular to a method of automatic cleaning and withdrawing protection to extend the electrode during on-line monitoring of the pH value of sewage in petrochemical industry It is an electrode maintenance method that automatically cleans the electrode online without removing the electrode for manual maintenance. Background technique [0002] Controlling the stability of the pH value of the medium is a major measure for the anticorrosion of equipment in the petrochemical industry, especially in refining and chemical enterprises. By monitoring the change of the pH value of the medium, the acid in the medium is neutralized by injecting ammonia (or amine) and other technological means, so as to achieve the standard and stable pH value of the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/38G05B19/04
Inventor 唐汇云郑丽群麦郁穗李欣波王兴旭
Owner SHENYANG ZKWELL CORROSION CONTROL TECH
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