Equipment and method for treating nondegradable wastewater by utilizing catalytic oxidation of ozone

Abstract

The invention provides equipment and a method for treating nondegradable wastewater by utilizing catalytic oxidation of ozone. The equipment comprises a feeding system, an ozone catalytic reaction tower and a spray absorbing tower; the feeding system comprises a wastewater pH regulation device, a wastewater feeding pipeline, a hydrogen peroxide aqueous solution feeding pipeline, an ozone feeding pipeline and a pH regulator feeding pipeline; the wastewater pH regulation device is communicated with the wastewater feeding pipeline and the pH regulator feeding pipeline respectively; the ozone feeding pipeline is communicated with the wastewater feeding pipeline; the ozone catalytic reaction tower is communicated with the wastewater feeding pipeline and the hydrogen peroxide aqueous solution feeding pipeline respectively so that wastewater undergoes once catalytic reaction in the presence of a first catalyst to generate a liquid flow and an ozone tail gas flow which are subjected to initial treatment; and the spray absorbing tower is communicated with a catalytic reaction system, is used for spraying at least one part of the liquid flow which is subjected to the initial treatment, and is contacted with the ozone tail gas flow in the presence of a second catalyst to undergo second catalytic reaction.

Description

technical field [0001] The invention relates to a device and a method for treating refractory waste water by catalytic oxidation of ozone. Background technique [0002] With the rapid growth of my country's total economic volume, the discharge of industrial water is also increasing year by year. In 2006, my country's industrial water consumption has reached 134.4 billion m 3 , close to 40% of the country's total water consumption, most of which need to be treated and discharged to meet standards. Industrial wastewater in chemical, printing and dyeing, coking, pharmaceutical and other industries contains a large amount of organic matter that is difficult to biodegrade. The operation requirements are relatively high, so it is generally discharged after dilution, resulting in a lot of waste of clean water resources, but the total discharge volume has not been reduced. Efficient, stable, and safe advanced processing technology needs to be studied. [0003] The use of ozone te...

AI Technical Summary

Problems solved by technology

However, the rotation speed of the high-gravity rotating packed bed is 200-2000rpm, the power consumption is high, and the structural strength of the reactor is high, there are problems of large one-time investment and high operation and maintenance costs, and the utilization rate of ozone is low

[0005] Application No. 200810236178.0 "A Method for Treating VC Wastewater by Catalytic Ozonation" uses a solid catalyst to deeply catalyze ozone oxidation of organic matter at a specific temperature, and utilizes the CO produced by the degradation of organic matter 2 with Ca 2+ Formation of calcium carbonate precipitates to remove Ca 2+ , use sodium thiosulfate to wash and remove the ozone in the tail gas, so the ozone in the tail gas is not further utilized, so the utilization rate of ozone is low, and the cost of washing the tail gas with sodium thiosulfate is higher

In addition, the CaCO produced by deep oxidation using this method 3 Precipitation will scale on the surface of the catalyst carrier, affecting the performance of the catalyst, requiring frequent regeneration or replacement

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