Product Information
A dosing system is a packaged setup used to feed chemicals precisely into a water treatment process. An integrated dosing system mounts the solution tank, metering pump, mixer, and control cabinet on one skid—compact, and ready to go once you hook up the piping and power. An acid and alkali dosing system is mainly for pH adjustment, and the materials are chosen to handle acid and base corrosion—PE tanks, PP piping, and corrosion-resistant pump heads. These systems are common in circulating water, wastewater, and water supply treatment.
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Working Principle
The chemical is first diluted with water in the solution tank, and the mixer blends it thoroughly. The metering pump draws the solution out at the set flow rate and sends it through piping to the dosing point. Flow can be adjusted by changing the pump stroke or using a VFD, and some systems adjust the dose automatically based on signals from an online pH meter or flow meter. The acid and alkali dosing system uses corrosion-resistant pump heads and piping to handle strong acids and bases. Most units come with level protection—if the tank runs low, the system shuts down and sounds an alarm.
Application Fields
1.Circulating cooling water: dosing corrosion and scale inhibitors, biocides, and algaecides to prevent scaling and biological growth.
2.Wastewater treatment: dosing flocculants and coagulant aids to improve settling.
3.Water supply treatment: dosing coagulants or disinfectants to ensure effluent quality.
4.PH adjustment: using an acid and alkali dosing system to adjust wastewater pH for discharge or downstream processes.
FAQ
Q1: How do you adjust the flow rate on a metering pump?
A: Two common ways. You can turn the stroke knob by hand to change the volume per stroke, or use a VFD to change motor speed. On an automatic dosing system, the pump flow adjusts on its own based on signals from online instruments like pH or flow meters—no manual input needed.
Q2: How do you choose materials for an acid and alkali dosing system?
A: It depends on how corrosive the chemical is. Dilute acids typically use PP or PVC tanks with PVDF or PTFE pump heads. Dilute bases can use PE or plastic-lined carbon steel. Concentrated sulfuric or nitric acid is tougher—piping and seals need special materials. Stainless steel generally isn't used for acid and alkali dosing unless the concentration and temperature are specific.
Q3: Does a dosing system need a mixer?
A: It depends on the chemical. Powders or hard-to-dissolve chemicals, like polyacrylamide, need a mixer to help them dissolve and prevent clumping. Liquid chemicals like sodium hypochlorite or dilute acid generally don't need continuous mixing—an occasional stir or a circulation pump is enough. The mixer doesn't need much power—just enough to do the job.