Method for verifying addition amount of hydrogen peroxide for treating nitro-oxidant wastewater

Abstract

The invention discloses a method for verifying the addition amount of hydrogen peroxide for treating nitro-oxidant wastewater. The method comprises the following steps: preparing a plurality of groupsof nitro-oxidant wastewater solutions; calculating the theoretical volume addition amounts of calibrated H2O2, respectively adding H2O2 with the addition amount increased progressively in a gradientmanner into each group of solution, and setting a blank control group; measuring and calculating the concentration of nitrate nitrogen, the concentration of nitrite nitrogen and the concentration of nitrous acid in the six groups of wastewater before neutralization, and the concentration of nitrate nitrogen and the concentration of nitrite nitrogen in the neutralized wastewater by adopting a spectrophotometric method; drawing a corresponding curve graph according to measured data, and respectively calculating the ionization degree of nitrous acid in the six groups of wastewater before neutralization, the removal rate of nitrite (containing nitrous acid) and the conversion rate of nitrogen in N2O4 after neutralization; and determining the optimal addition amount of H2O2. According to the method, the addition amount of hydrogen peroxide for treating the nitro-oxidant wastewater is determined, and a theoretical basis is provided for realizing a maximum nitrogen element conversion rate anda maximum nitrite removal rate.

Description

technical field [0001] The invention relates to the technical field of nitro-oxidant wastewater treatment, in particular to a method for verifying the dosage of hydrogen peroxide used for treating nitro-oxidant wastewater. Background technique [0002] Nitrogen oxidants include dinitrogen tetroxide, green dinitrogen tetroxide and red fume nitric acid, etc., which are widely used in bicomponent liquid propellant systems due to their good energy properties. Nitro oxidants are strong oxidizing acids, and accidents of leakage and loss occur frequently in the process of production, storage, transportation or filling. When dealing with such accidents, a large amount of waste water will be generated. In addition, after completing the transfer task, the nitro A large amount of wastewater will also be generated during the decontamination of oxidant storage tanks, tank trucks, pump trucks and pipelines. This type of wastewater contains a large amount of dinitrogen tetroxide oxidant, ...

AI Technical Summary

Problems solved by technology

However, how to determine the dosage of hydrogen peroxide at the optimum ratio to achieve the maximum conversion rate of nitrogen and the removal rate of nitrite has not been disclosed in the prior art.

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