Nitrogen oxide tail gas treatment process

Abstract

The invention belongs to the field of nitrogen oxide waste gas treatment, and discloses a nitrogen oxide tail gas treatment process which comprises the following steps: firstly, extracting nitrogen oxide tail gas generated by a gallium nitrate reaction kettle by using a centrifugal fan; the method comprises the following steps: recovering entrained liquid through a gas-liquid separator, mixing and reacting with water in a clear water bubbling absorption tank to generate HNO2 and HNO3, mixing with hydrogen peroxide in a bubbling absorption oxidation tank, quickly oxidizing NO into NO2, reacting with urea in a water jet vacuum unit to generate N2, CO2 and H2O, and effectively absorbing and purifying by alkali liquor in a spray packed tower. The flue gas in the workshop environment is further treated after the flue gas is finally absorbed by the flue gas adsorption tower, and the flue gas is uniformly discharged by a chimney after being treated to reach the standard. The process has the advantages of simple steps, flexible and convenient dosing and dosing, reduction of the labor intensity of personnel, reasonable utilization of energy, high treatment efficiency, and reduction of the operation cost and the production energy consumption.

Description

technical field [0001] The invention belongs to the field of nitrogen oxide waste gas treatment, and more specifically relates to a nitrogen oxide tail gas treatment process. Background technique [0002] Nitric oxide, nitrogen dioxide, laughing gas, nitrogen pentoxide, etc. are common components in tail gas containing nitrogen oxides. They are common air pollutants, and the main components are nitrogen monoxide and nitrogen dioxide. [0003] The treatment methods of nitrogen oxides include reduction method, plasma activation method, biochemical method, adsorption method and liquid absorption method. The liquid absorption method is a method of absorbing nitrogen oxides in the exhaust gas with water or an aqueous acid, alkali, or salt solution to purify the exhaust gas. At present, most of the nitrogen oxide tail gas treatment devices are large-scale alkali spray scrubber devices, which have problems such as large equipment, high operating costs, and poor mass transfer effec...

AI Technical Summary

Problems solved by technology

At present, most of the nitrogen oxide tail gas treatment devices are large-scale alkali spray scrubber devices, which have problems such as large equipment, high operating costs, and poor mass transfer effects.

And because of NaOH to NO 2 , The reaction and absorption of NO peroxynitride is limited, and the exhaust gas after treatment still has nitrogen oxides and sour taste, which cannot achieve the effect

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