Product Information
An automatic dosing system is a packaged unit that replaces manual chemical feeding in water treatment. The automatic circulating water dosing machine is built specifically for cooling and chilled water systems. It uses online water quality monitoring to adjust the chemical feed rate automatically. Smart dosing equipment goes a step further, adding a human-machine interface and data processing, so it can tweak parameters in real time based on changes in flow or water quality—cutting down on chemical waste. These units are usually skid-mounted, compact, and require very little day-to-day attention.
Get a QuoteAutomatic Dosing System | Automatic Circulating Water Dosing Machine | Smart Dosing Equipment
Working Principle
The chemical is diluted and mixed in a dissolving tank, then drawn out by a metering pump at a set flow rate. The system uses online sensors—like pH meters, conductivity meters, chlorine analyzers, or flow meters—to collect real-time data and send it to the PLC controller. The controller compares the actual readings against the setpoints and automatically adjusts the pump stroke or VFD frequency to keep the dose precise. Smart dosing equipment can also log operational data and generate reports; some models support remote communication to tie into a central control room. If the chemical tank level gets too low, the system automatically shuts down and alarms to prevent the pump from running dry.
Application Fields
1.Circulating cooling water: dosing scale and corrosion inhibitors and biocides to prevent scaling and biofouling.
2.Wastewater treatment plants: precise dosing of flocculants (PAC/PAM) or phosphorus removal agents to improve settling.
3.Boiler water treatment: automatic dosing of oxygen scavengers and phosphates to protect boiler piping.
4.Water reuse: dosing disinfectants or stabilizers to keep reused water consistently within standards.
FAQ
Q1: What materials are typically used for an automatic dosing system?
A: Solution tanks are commonly made of PE, PVC, or FRP to resist acids and bases. Piping is selected based on the chemical—UPVC, PP, or PVDF. Pump heads are usually PVC, PVDF, or PTFE. For oxidizing chemicals like sodium hypochlorite, the tank also needs to be protected from light, or made with a UV-resistant coating.
Q2: How does an automatic circulating water dosing machine determine the dosage?
A: Usually in one of two ways. One is flow-proportional, dosing according to makeup or circulating water volume. The other is closed-loop control, using online conductivity, pH, or chlorine analyzers to monitor water quality in real time, with the PLC calculating and adjusting the dose automatically. The right choice depends on system control requirements and the type of chemical.
Q3: What functions does the control system of smart dosing equipment offer?
A: It usually has a touch screen showing real-time water parameters, pump status, and dosing rates. It includes data storage and trending so historical records can be exported. Advanced models support Ethernet or 4G communication to connect with the plant's central control room, and come with fault alarms and low-level shutdown protection.