pH Monitoring and Control System
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pH Monitoring and Control System
The pH monitoring and control system comprises three key components: an online pH monitoring system, an automatic pH electrode cleaning system, and an intelligent injection control system. The online pH monitoring system operates on the principle of potentiometric measurement, enabling real-time pH detection and data display. To address the issues of easy contamination and short lifespan of pH electrodes commonly encountered in industries such as refining and petrochemicals, we have developed an automatic pH electrode cleaning device. This device automatically cleans and maintains the pH electrode after each measurement, thereby significantly extending its service life. Building upon the pH monitoring and automatic electrode-cleaning systems, we have also developed an intelligent injection control system specifically tailored for oil refining and ethylene plants. This system can automatically adjust the injection dosage, ensuring that the pH value of corrosive media remains within the desired range and effectively controlling corrosion.
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pH monitoring and control system
- Product Description
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Three Measurement Methods for pH Monitoring Systems
● The method of directly installing a pH electrode on process pipelines for measurement
● A method in which the branch pipeline diverts the medium for measurement and performs online cleaning of the pH electrode.
● Employing process handling technology, the medium is automatically extracted into a sampler for processing and measurement, after which the extracted medium is discharged via intelligent measurement methods to low-pressure pipelines, floor drains, sealed drainage systems, or the original pipelines.
Product Category
Name Online pH Monitoring System Automatic pH Electrode Cleaning System Injection Intelligent Control System Function applicable Monitor the pH value during the process, enabling real-time pH measurement and data display. The pH electrode can automatically undergo cleaning and maintenance after measurement is completed. The injection dosage can be automatically adjusted to keep the pH value within the expected range, thereby effectively controlling corrosion. Main components pH Data Collector pH Data Collector pH Data Collector pH electrode pH electrode pH electrode / Automatic Cleaning Device for pH Electrodes Automatic pH dosing controller Technical Parameters
pH Data Collector Function The pH data collector is the data acquisition and storage unit of an online pH monitoring system, also known as a pH data acquisition transmitter. Its function is to store and transmit the data measured by the pH probe, ultimately enabling the display and analysis of numerical values on the terminal device. Model ZK6810 pH measurement range 0–14 Applicable ambient temperature -20℃ to +55℃ Applicable relative humidity ≤93% Transport/Storage Temperature -40℃ to 70℃ Operating voltage DC 18–36V Instrument power consumption 0.3W Explosion-proof type Intrinsically safe, flameproof Data transmission method RS485, 4-20mA pH electrode Function In pH online monitoring and control systems, the pH electrode is an important sensing element. For different process media environments, it is essential to select an appropriate pH electrode for monitoring. Model ZK6200 ZK6201 ZK6205 ZK6215 ZK6220 Measurement range 1~14 pH Temperature 4~70℃ 0~130℃ 0~120℃ ≤130℃ ≤105℃ Withstand voltage <0.7 MPa <0.8 MPa <0.7 MPa <2Mpa <0.7 MPa Measurement resolution 0.001 Automatic Cleaning Device for pH Electrodes Model ZK6C83 Size 1250*800*400mm (height * width * thickness) Measurement range 0-14pH Measurement resolution Auto / 0.001 / 0.01 / 0.1 / 1 (optional) Medium particles Booster pump ≤ 10 μM; diaphragm pump ≤ 1700 μM Medium temperature T ≤ 80℃ (For temperatures above 80℃, a custom-installed heat exchanger is required.) Washing water temperature 0℃ ≤ T ≤ 80℃ (50℃ is ideal) Medium pipeline pressure 0.15 MPa ≤ P ≤ 1.6 MPa (A pressure-reducing valve must be added for pressures above 1.2 MPa.) Waste liquid recovery pipeline pressure Booster pump P ≤ 1 MPa / Diaphragm pump P ≤ 0.3 MPa Instrument air 0.6 MPa ≤ P / Air consumption: 0.8 m³ 3/min-3m3 /min/ The duct diameter shall not be less than Φ8. Clean the pipeline pressure. 0.3 MPa ≤ P ≤ 1.2 MPa (softened water/desalinated water/deoxygenated water/circulating water/municipal water) Installation method Bypass installation Wastewater discharge destination Floor drains, other low-pressure pipelines, and original medium pipelines Medium dosage <1.1 L/cycle Water consumption for cleaning <3.3 L/cycle Winter heating temperature 70℃ ≤ T ≤ 100℃ (with built-in ceramic tube heating provided by the enclosure) Working power DC36V Communication method RS485 Wiring RVVP_2*1.5 + 3*0.5 (or other multi-screen total cable) Flange connection DN25 CL300 (customizable upon request) Intelligent Control System for Additive Injection in Refining Units Model ZK5800 ZK5810 ZK5820 Scope of application Single-channel injection control Dual-path injection control Three-way injection control Control accuracy 0.3pH Ambient temperature -20℃ to +55℃ Relative humidity ≤85% Operating voltage AC 220V Intelligent Control System for Emergency Coolant Injection in Ethylene Plants Model ZK5400 ZK5410 Scope of application Single-channel control Multi-channel control Frequency range 0–50 Hz Ambient temperature -20℃ to +55℃ Relative humidity ≤95%, no condensation Working power AC 220V System Architecture
Name Options System part Monitoring machine/server Required Display Required Industrial control cabinet Required Electrode section Electrode Required Electrode cable Required Electrode calibration solution Optional Power and Communication Conversion Section Power and Communication Conversion Module Required Spare parts section Flange connection Optional Relief valve Optional Heat exchanger Optional Gas-liquid booster pump Required Electrode lead-out pH short circuit Required Host section Data collector Required Open-Loop Automatic Cleaning Controller Required Style-taking automatic cleaning controller Required Automatic injection controller Required
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