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Boiler boiler water dosing is generally conducted by laboratory personnel after on-site sampling and analysis, followed by manual control. It is impossible to monitor water quality changes in real time, resulting in reduced boiler and turbine efficiency, scaling or corrosion of heat exchange tubes and turbine blades, and in severe cases, pipe bursts and other accidents, causing prolonged shutdowns of main equipment. After long-term experimental research, online monitoring instruments are used to monitor boiler water quality, accurately dosing and discharging based on boiler water quality, ensuring optimal boiler water quality and improving equipment operating efficiency.
System composition
Sampling system: The sampling system continuously and automatically samples boiler system water, steam, feedwater, condensate, softened water, and other components. The sampling system treats water samples with constant temperature, constant flow, constant pressure, and filtration.
Online monitoring instruments
After water samples are processed by the sampling system, the online instrument automatically samples and monitors water quality. According to customer requirements, data such as hardness, alkalinity, phosphate, silicon dioxide, sodium ions, conductivity, pH, chloride, dissolved oxygen, hydrazine, turbidity, and other data can be monitored online and uploaded to the control room.
Control system
Based on online instrument monitoring data, the system automatically controls dosing time and boiler discharge volume, achieving automatic dosing and sewage discharge of boiler water, ensuring optimal boiler water quality.
Instrument configuration
Monitoring sources | Monitoring indicators | Optional indicators |
Demineralized water softens water | Hardness, pH, conductivity | Total iron and turbidity |
Condensate water | Hardness, pH, conductivity | Dissolved oxygen, total iron, turbidity |
Boiler feedwater | Hardness, pH, conductivity, dissolved oxygen, turbidity | Total iron and chloride ions |
Boiler water | Total basicity, phosphate levels, conductivity, pH | Turbidity |
Saturated steam | pH, conductivity | Silicon dioxide, sodium ions |
Superheated steam | pH, conductivity | Silicon dioxide, sodium ions |
Technical Specifications
Measurement indicators | Methodological basis | Implement standards | Measurement range | Accuracy | Measurement cycle |
Hardness | Titration method | GB/T6909-2008 | 0.00~30.00mg/L | ±5% | ≤15min |
Total alkalinity | Titration method | GB/T 14419-93 | 0.00~10.00mmol/L | ±5% | ≤15min |
Phosphate group | Phosphomolybdenum blue spectrophotometry | GB/T11893-89 | 0.00~150.00mg/L | ±5% | ≤20min |
General iron | Ortho-phenophrin-spectrophotometry | HJT 345—2007 | 0.00~50.00mg/L | ±5% | ≤30min |
Chloride ions | Titration method | GB11896-89 HJ/T343-2007 | 0.00~8000.00mg/L | ±5% | ≤50min |
Silicon dioxide | Silico-Molybdenum Blue Spectrophotometry | GB/T 12149-2017 | 10.00~1000.0ug/L | ±5% | ≤30min |
The range can be customized and adjusted according to the water quality on site | |||||
Calibration cycle | Regular manual calibration or automatic calibration | ||||
Maintenance cycle | 3 months | ||||
Output signal | RS232、RS485、TCP/IP、4～20mA | ||||
Power supply adaptability | AC220V ± 10% frequency 50±1% Hz | ||||
Environmental adaptability | Temperature: 5~40°C, relative humidity ≤90% (non-condensing) | ||||
Solving problems
Based on online instrument monitoring data, the system automatically controls dosing time and boiler discharge volume, achieving automatic dosing and discharge of boiler water, ensuring optimal boiler water quality.
Product features
Modular, automated, precise control, and central control management.
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Address：No. 267, 2nd Floor, East District, Zhimao City, Honghe Road, Jinghe Street, Tengzhou City, Zaozhuang City, Shandong Province
Email：mzd18363281129@163.com
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