Liquid Collection Tank

In the production, concentration, purification, and transportation pipelines of phosphoric acid and its derivatives (such as wet-process phosphoric acid, thermal phosphoric acid, and phosphates), the liquid collection tank is a proactively designed safety and resource recovery system. It is specifically designed to systematically and preventively collect process media leaks (such as phosphoric acid, phosphoric acid slurries, reaction intermediates, etc.) that may occur from equipment, pipelines, valves, and other connections, as well as related flushing water and cooling water.

Core Functions

Primary Function: Process Safety and Plant Protection
Hazard Control: Immediately isolate and divert corrosive and irritating liquids to prevent chemical burns to personnel.
Infrastructure Protection: Prevent phosphoric acid leaks from corroding concrete foundations, steel structures, and underground pipe networks, avoiding catastrophic foundation failure and production shutdowns for major repairs.
Preventing Escalation to Major Accidents: Through rapid collection, prevent the spread of leaks that could trigger secondary reactions, slips, or contamination of other systems.
Core Function: Environmental Protection and Regulatory Compliance
Achieving "Zero Leakage": Meets the legal requirements of strict global environmental regulations (such as China's "Water Pollution Prevention and Control Law" and the EU SEVESO Directive) for controlling uncontrolled emissions of hazardous liquids.

Protecting Soil and Groundwater: Phosphoric acid and its contained fluorides and heavy metals can cause long-term ecological damage if leaked.
Value-Added Function: Resource Recovery and Cost Control
Recovering High-Value Materials: Collected concentrated phosphoric acid or high-concentration materials can be directly returned to the production process, reducing raw material losses.
Reducing Waste Treatment Burden: The cost of treating concentrated waste liquid collected centrally is far lower than treating wastewater or soil contaminated by large-scale dilution.

Operation and Maintenance

Rinse with clean water once a week to prevent Na₂HPO₄·12H₂O crystallization; if white scaling is found, circulate with 40℃, 5% citric acid for 15 minutes.
Inspect for liner bulging and weld leaks quarterly; local damage to PPH or PO can be repaired with hot air welding rods of the same material; for graphite or metal tanks, focus on thickness measurement and record the corrosion rate.

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