What parameters need to be analyzed before reusing treated water, and what parameters need to be monitored after it is put into use
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The shortage of water sources has made the necessity of recycled water use a priority. In petrochemical companies, in what areas is recycled water used? What needs to be analyzed when using cooling water for reuse?
Follow-up question: The conventional analysis parameters of reclaimed water are normal, but the coating suffers severe corrosion. What could be the reason? ? I would appreciate your advice.
The treatment principles for reusing reclaimed water are determined based on the requirements for its reuse. In general, when it comes to reclaimed water, there aren’t any particularly stringent indicators that serve as restrictions. If reclaimed water is only used for daily washing within a facility and for watering green plants in the environment, the treatment requirements are very low. As for the situation mentioned by the original poster, targeted measures need to be taken to ensure that the water quality meets the requirements specified for the materials used in your equipment. Regarding the corrosion of coated surfaces, conventional analysis methods may not be able to determine the types and concentrations of corrosive substances; therefore, targeted analytical tests are required, such as for chloride ions and other halide ions, oxidizing substances, and chelating substances.
By cooling water, do you mean the circulating cooling water used for heat exchange, the quenching water for reactions, or the water used for spray cooling of some spherical tanks during hot seasons? In extreme cases, water previously used for quenching coke can be water with a relatively high level of contamination; in some instances, wastewater doesn’t even need to be treated at all. Different occasions have different requirements for water quality.