From Feedback Method to the Establishment of Feedforward Method
The water quality of the water source shows a trend of complex pollution, and there is a demand for advanced and strict chlorine treatment and management in water purification processes. The traditional feedback method, which seeks appropriate values after chlorine injection, has posed health and economic issues. Therefore, it is desirable to establish a feed-forward method that captures the chlorine demand of raw water in advance and processes it. From sampling to measurement, all substances in raw water, such as ammonia nitrogen, iron, manganese, and organic matter, will be continuously and fully automatically measured for their chlorine demand in a short time. It can be used as a monitor for surveillance and, in combination with chlorine injection equipment, for accurate chlorine injection control as an automatic proportional injection system. 【Features of the CD-12MF model】 - Improved rotating platinum electrode for residual chlorine detection - No pre-treatment by filtration required even for high turbidity samples - Continuous measurement of chlorine demand in raw water - Follows rapid changes in raw water quality - Expanded screen size for improved visibility - Easy operation via touch panel - Equipped with USB functionality
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basic information
Measurement target: Chlorine demand of raw water Measurement method: Ultraviolet accelerated continuous electric titration method Measurement range: 0–10 / 0–20 mg/L (ppm) automatic two-stage switching (or 0–15 / 0–30 mg/L (ppm)) Output signal: DC 4–20 mA Response speed: Within 15 minutes (90% response time for a step input of 0→8 mg/L) Ambient temperature: 0–35 °C Ambient humidity: 0–85% Sample water collection rate: 6 mL/min Reagent flow rate: 2 mL/min Reagent: 2.5 mol/L sodium chloride solution (50L in reagent tank) Detection electrode: Rotating platinum electrode (2Φ spot type) Reference electrode: Silver electrode (10Φ×4mm) Reaction acceleration: Ultraviolet irradiation method Required water volume: 5 L/min, below 0.2 MPa (approximately 2 kg/cm²) Required power supply: AC 100V, 50Hz/60Hz, 5A Power consumption: Below 500 VA Connection pipe diameter: Water supply inlet VP20A×1, Drain outlet VP25A×3 Operating weight: Approximately 200 kg Installation method: Indoor floor anchor bolt type (4 bolts)
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Applications/Examples of results
Water purification treatment
Detailed information
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- Schematic Diagram Continuously sample the test water, mix it with chlorine water obtained by electrolyzing a reagent (saltwater), and perform ultraviolet irradiation to promote the chlorine consumption reaction of the raw water (reaction tank). Detect the residual chlorine at the outlet of the reaction tank and control the electrolysis current of the chlorine generator so that a certain amount of free residual chlorine remains, allowing the chlorine generation to follow the changes in chlorine demand of the test water. Calibrate the zero point using distilled water as the test water and the span using a standard chlorine demand solution, then measure the chlorine demand of the unknown test water.
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| Model number | overview |
|---|---|
| C00008301 | Chlorine Demand Meter CD-12MF Type |
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Company information
Since our establishment in 1967, we have been dedicated to the development and dissemination of water quality measurement devices that anyone can use quickly, easily, and with high precision. In today's world, where the effective use of water, a limited resource, is required alongside environmental conservation, we aim to be a total solution provider that responds to all water environments by utilizing our water quality measurement devices, technology, and services. Furthermore, leveraging the latest technology and years of know-how, we are committed to delivering user-friendly and reliable water quality measurement devices more affordably, quickly, and widely.
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