Key Features
- Oxidation and Corrosion Resistance: The material must withstand the strong oxidizing properties of sodium hypochlorite to prevent pitting and cracking of the tank walls.
- Temperature Control: The recommended storage temperature is 0-40℃. High temperatures accelerate the decomposition of sodium hypochlorite, reducing the available chlorine content.
- Safety and Stability: The tank must be able to withstand negative pressure (to prevent the tank from collapsing during emptying). Large tanks require hydrostatic and airtightness tests.
Selection and Usage Considerations
- Define Solution Specifications: Available chlorine concentration, temperature, and whether it contains other impurities (such as alkali content). Higher concentrations place more stringent requirements on the material; higher temperatures accelerate decomposition.
- Determine the Installation Environment: Indoor/Outdoor? Above Ground/Underground? Highest/Lowest Ambient Temperature? This determines the material selection (UV resistance, pressure/external pressure resistance) and whether insulation is required.
- Avoid contamination sources: Acids, ammonium salts, organic matter, and heavy metal ions are strictly prohibited from mixing into the system.
- Upstream and downstream equipment such as dosing pumps and pipelines must also be material-compatible.
- Regular inspection and maintenance: Regularly test the available chlorine content and assess decomposition.
- Inspect the tank, breather valve, and seals for aging.
- Clean any small amounts of sediment (such as calcium carbonate) that may accumulate at the bottom of the tank.
Application areas
Water treatment plant chlorination
5–30 m³ HDPE tank + 316L magnetic pump + online dilution device, concentration 8% NaClO, stable operation for 8 years without leakage.
Hospital wastewater disinfection
2 × 1 m³ dual tanks alternating, equipped with PVC pipes and flow meters, achieving "one for use, one for backup," meeting GB 18466 requirements for medical institution wastewater discharge.
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