Technology for processing desulfurization wastewater

Abstract

The invention discloses a novel comprehensive processing technology of desulfurization wastewater. The technology comprises the following steps: introducing wastewater from a desulfurization system to a wastewater buffer tank (4) through an inlet pipe (1); lifting the wastewater in the wastewater buffer tank (4) to a neutralizing tank (9) through a lifting pump (3), adding a lime solution into the inlet end of the neutralizing tank (9) through a lime feeding pump (7) to adjust the pH value of the wastewater to around 9.0; and the input end of the lime feeding pump (7) is connected to a lime solution dosing tank (6). The system is provided with a two-stage clarifying device, each stage clarifying device can be individually designed according to the water quality of the inlet water, the surface loading of the two-stage clarifying device can be increased by 20 to 30%, so the two-stage clarifying device is more efficient than that of the conventional single-stage clarifying device.

Description

technical field [0001] The invention relates to a waste water treatment process, in particular to a desulfurization waste water treatment process. Background technique [0002] Desulfurization wastewater is produced in the wet flue gas desulfurization system. The water quality is weakly acidic and contains a large amount of salts and heavy metal ions. The desulfurization wastewater treatment device mainly targets heavy metal ions, fluoride and suspended solids. At present, neutralization tanks, settling tanks and coagulation tanks (commonly known as triple tanks) are generally used for pH adjustment, heavy metal ion reaction and coagulation. Enter the clarification concentrator for clarification treatment, the treated clean water is discharged, and the generated sludge is sent to the dehydration system for dehydration treatment. The treatment efficiency of this kind of technology is not high, the adaptability to the change of influent water quality is poor, and the qual...

AI Technical Summary

Problems solved by technology

The treatment efficiency of this kind of technology is not high, the adaptability to the change of influent water quality is poor, and the quality of effluent water is unstable. Among them, the indicators such as heavy metal ion content, COD, turbidity and other indicators are difficult to meet the standards, because the interaction between heavy metal ion remover and coagulant The chemical reaction causes a large consumption of chemicals, and the filler in the clarifier concentrator is easily damaged due to excessive load

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