Questions regarding process design: How to determine whether the wastewater treatment system requires insulation?
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Issues related to process design: How to determine whether insulation is needed for the wastewater treatment system? Sometimes insulation alone is not enough; it is also necessary to pass water through the heat exchanger to raise the temperature ； Sometimes insulation is not required, and a cold water tower is also needed for cooling. How are these determined? How do I calculate it?
It mainly depends on the process you use. Generally, the treatment process does not have strict requirements regarding temperature; of course, processes such as stripping and absorption do have higher requirements. However, biochemical treatment requires relatively high standards.
Generally, biochemical treatment in the north requires insulation and heating. Whether a cooling tower is necessary depends on the temperature of the incoming water; many industrial wastewater streams have extremely high temperatures, making it unsuitable to be sent directly into biological treatment processes. As for how to carry out the calculations, it’s simpler in the case of cooling towers – by taking into account the inlet and outlet water temperatures as well as the water volume, it’s possible to determine the specific parameters. As for heat retention and heating, factors such as the temperature difference between the inside and outside of the tank, heat loss from the tank walls and bottom, heat loss from the tank roof, and the impact of aeration on cooling the aerobic tank must be taken into consideration. However, even the modeling and calculations are quite complex, and the results obtained differ significantly from reality; it’s better to apply a higher safety factor.