Salt-containing wastewater treatment for flue gas desulfurization and denitration projects in catalytic devices?
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Due to environmental regulations that require catalytic devices to have desulfurization and denitrification systems, the treatment of saline wastewater has become a key issue to address in such projects. Investigations have shown that there are various methods used by different manufacturers for treating saline wastewater: some dilute the water before discharging it, some use evaporation and crystallization, while others employ membrane + MVR technology. I would like to ask all fellow sailors how saline wastewater is treated, and what problems exist at present? Are there any requirements regarding the salt content in saline wastewater discharge? (The chemical industrial park requires a level of <1600 ppm.) What type of waste heat is used as the heat source for evaporation crystallization? Thank you
The typical design temperature is around 200°, and low-pressure steam can be used.
The waste heat from catalytic units and gas separation plants can all be used as a heat source for multi-effect evaporation; temperatures between 140 and 150 degrees are suitable.