Ozonation process and equipment for oil-containing alkali wastewater

Abstract

The invention relates to a process for treating alkaline waste water with oil by using ozone, which comprises the steps: the industrial alkaline waste water with the oil and industrial acid water is taken as material and neutralized; the flow is calculated by PLC through a mathematical model and the flow calculation is accurate; the air flotation is used to carry out pre-treatment and the water after the pre-oxidization is discharged into an ozone pool; the ozonation gas is exposed in the ozone pool and the strong oxidizability of the ozone is used for resolving the oil in the water; then, the oil is treated by the depth treatment from a contact oxidation tank, thus reducing the pollutants discharge in the water and meeting the requirements of the water discharge. Index of the discharge water: the oil is equal or less than 5mg / l, the COD is equal or less than 70mg / l, the SS is equal to or less than 10mg / l; waste alkali neutralization is calculated through PLC by mathematical model andthe flow calculation is accurate; the oil is removed by the ozone, thus reducing consumption of the system; the contact oxidization tank is used as a depth treatment system, thus reducing the consumption of ore filler and being able to start and stop randomly; the system has high intellectualization and can be intervened manually based on the experience. The invention has advantages of low investment, low operation cost, wide resources, complete reaction, favorable treatment effect, compact structure and convenient management.

Description

technical field [0001] The invention relates to a purification treatment process and equipment for industrial oily alkaline wastewater. Background technique [0002] In the prior art, the oil-containing alkaline wastewater is pumped into the neutralization tank from the adjustment tank, and acid water is poured into the neutralization tank, and after neutralization, it is deoiled by air flotation, and then enters the degreasing filter for deep degreasing. [0003] The previous treatment method was pure physical and chemical treatment, and the oil content in the effluent was high, which could not meet the requirements of advanced treatment for a long time. The above energy consumption is large, not energy-saving itself, and consumes a lot of mineral filter materials, resulting in secondary pollution, which does not meet environmental protection requirements, and is not enough to realize the full automation of the system and ensure the long-term stable operation of the system....

AI Technical Summary

Problems solved by technology

[0003] The previous treatment method was pure physical and chemical treatment, and the oil content in the effluent was high, which could not meet the requirements of advanced treatment for a long time

The above energy consumption is large, it is not energy-saving itself, and consumes a lot of mineral filter materials, resulting in secondary pollution, which does not meet environmental protection requirements, and is not enough to realize the full automation of the system and ensure the long-term stable operation of the system

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