How can high-concentration NHD wastewater be recovered through distillation and extraction?

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1) The filter flushing fluid contains coal ash carried in the water gas generated by vaporization, as well as catalyst powder produced during the operation of the system. Together with rust resulting from equipment corrosion, these substances can easily lead to an increase in resistance in the desulfurization towers over time. Sediment tends to accumulate on the packing, as well as on the equipment and pipes. Therefore, the solution system requires online filtering, with regular backwashing of the solution filters. 2) Condensate from desulfurization flash vapor and condensate from regenerated gas: When the system’s production load is adjusted, it becomes difficult to maintain the horizontal balance in the desulfurization system, which can lead to disruptions; as a result, the amount of recycled water either falls short or exceeds the required levels. In other words, the water content in the desulfurization solution exceeds the specified limits, forcing some of the recycled water to be discharged outside the system. I would like to ask how to proceed specifically. Wastewater may contain other impurities; how can these be detected? I want to recycle and reuse the NHD!