A nitric acid flue gas absorption treatment method with high recovery rate

Abstract

The invention discloses a method for absorbing and treating nitric acid flue gas with a high recovery rate. The invention specifically includes the following steps: S1, connecting one end of the eighth connecting pipe with the inside of the storage tank for dilute nitric acid loading, and closing the inside of the eighth connecting pipe The first gas valve provided, the invention relates to the technical field of nitric acid fume absorption and treatment. In this nitric acid flue gas absorption treatment method with high recovery rate, the outlet end of the jet vacuum pump is connected with a diffuser tube, and one end of the diffuser tube is communicated with the interior of the absorption tank, and the interior of the absorption tank is communicated with a fifth connecting pipe, the fifth One end of the connecting pipe is connected to the third absorption pipe through an elbow, and one end of the third absorption pipe is connected to the gas-liquid separator, and the gas-liquid separator is connected to the return pipe, and one end of the return pipe is connected to the fifth connecting pipe. , can better solve the problem of direct discharge of nitric acid fumes, and has a high recovery rate, effectively reduces gas emissions, improves the working environment, and improves the ability to control concentrated nitric acid fumes.

Description

technical field [0001] The invention relates to the technical field of nitric acid flue gas absorption and treatment, in particular to a nitric acid flue gas absorption and treatment method with high recovery rate. Background technique [0002] Simultaneous desulfurization and denitrification of flue gas is one of the urgent problems to be solved in the field of environmental protection. At present, simultaneous desulfurization and denitrification technology is divided into three categories: (1) Selective catalytic reduction method, which is to use catalytic reducing agent to reduce SO2 to elemental sulfur and / or nitrogen reduction The oxide is N2, and the exhaust gas reaches the emission standard after being absorbed to achieve simultaneous desulfurization and denitrification; (2) The oxidation absorption method uses various strong oxidants such as NaClO2, ClO2, HClO3, KMnO4, etc., to oxidize the water-insoluble NO to form NO2, thereby At the same time, it is absorbed with ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a nitric acid fume absorption treatment method with a high recovery rate, which solves the problem that the nitric acid fume is directly discharged into the atmosphere without absorption treatment, which not only deteriorates the on-site operating environment, but also causes certain environmental pollution

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