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FAQ
  • What are the causes of the rise and fall of circulating water turbidity?

    Poor makeup water quality and increased suspended solids in raw water.

    Breeding of microorganisms and biological slime.

    Dust brought in from the surrounding environment of the cooling tower.

    Corrosion products and process medium leakage.

    Poor effect of the side filter.

  • What are the impacts of excessive iron ions in circulating water?
    The presence of 2.0mg/L iron ions in circulating water will increase the annual corrosion rate of carbon steel heat exchangers by 6-7 times and aggravate local corrosion. High iron ion concentration creates favorable conditions for the reproduction of iron bacteria. In addition, when polyphosphate is used as a corrosion inhibitor, iron ions will interfere with the corrosion inhibition effect of polyphosphate and may lead to hard ferric phosphate scale. Furthermore, a slow and continuous increase in iron ions in circulating cooling water indicates possible corrosion of equipment.
  • What are the impacts of excessive iron ions in circulating water?
    The presence of 2.0mg/L iron ions in circulating water will increase the annual corrosion rate of carbon steel heat exchangers by 6-7 times and aggravate local corrosion. High iron ion concentration creates favorable conditions for the reproduction of iron bacteria. In addition, when polyphosphate is used as a corrosion inhibitor, iron ions will interfere with the corrosion inhibition effect of polyphosphate and may lead to hard ferric phosphate scale. Furthermore, a slow and continuous increase in iron ions in circulating cooling water indicates possible corrosion of equipment.
  • What is the impact of high residual chlorine content in circulating water on alkalinity determination?
    If the residual chlorine in circulating water is high (>4ppm) during alkalinity determination, normal color development will not be possible, and the color of methyl orange will change from orange to colorless when titrated with hydrochloric acid.
  • What are the factors affecting residual chlorine in circulating water?
    Light and temperature: The higher the temperature, the lower the solubility of chlorine and the easier it is to volatilize; light also accelerates the decomposition of HClO.
    Reducing substances in water: Reducing substances such as ammonia nitrogen in water will consume the residual chlorine in circulating water.
  • Improvement suggestions for circulating water system during shutdown and maintenance?
    Slime stripping can be carried out before shutdown. The pool is drained during shutdown and maintenance to achieve rapid replacement. Meanwhile, the dirt stripped from slime can be discharged out of the system by physical flushing during maintenance. Physical flushing is recommended for heat exchangers with low flow rate. Pay attention to the changes of total iron and turbidity after startup, and strengthen replacement and backwashing of the side filter.