Nitric acid flue gas absorption treatment method with high recovery rate

Abstract

The invention discloses a nitric acid flue gas absorption treatment method with high recovery rate. The method specifically comprises the following step: S1, one end of an eighth connecting pipe is communicated with the inside of a storage tank for dilute nitric acid truck-loading, and a first air valve arranged inside the eight connecting pipe is closed. The invention relates to the field of a nitric acid flue gas absorption treatment technology. According to the nitric acid flue gas absorption treatment method with high recovery rate, an outlet end of an ejector vacuum pump is communicated with a diffuser pipe, one end of which is communicated with the inside of an absorption tank; the inside of the adsorption tank is communicated with a fifth connecting pipe, one end of which is communicated with a third absorption pipe through a bend; one end of the third adsorption pipe is communicated with a gas-liquid separator, the inside of which is communicated with a return pipe; and one endof the return pipe is communicated with the inside of the fifth connecting pipe. The direct emission problem of nitric acid fume can be greatly solved. In addition, recovery rate is high, gas emission is effectively reduced, working environment is improved, and concentrated nitric acid fume treatment capability is enhanced.

Description

technical field [0001] The invention relates to the technical field of nitric acid fume absorption and treatment, in particular to a nitric acid fume absorption and treatment method with high recovery rate. Background technique [0002] Simultaneous flue gas desulfurization and denitrification is one of the urgent problems in the field of environmental protection. At present, simultaneous desulfurization and denitrification technologies are divided into three categories: (1) Selective catalytic reduction method, which is to use catalytic reducing agent to reduce SO2 to elemental sulfur and / or reduce nitrogen The oxide is N2, and the tail gas reaches the emission standard after absorption, realizing simultaneous desulfurization and denitrification; (2) oxidation absorption method, using various strong oxidants such as NaClO2, ClO2, HClO3, KMnO4, etc., to oxidize the insoluble NO into NO2, thereby Simultaneously absorbed with SO2 in the lye in the later stage to achieve the pu...

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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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