Nitric acid flue gas absorption treatment method with high recovery rate

A treatment method and recovery rate technology, applied in the direction of gas treatment, separation methods, chemical instruments and methods, etc., can solve the problems of deteriorating on-site operating environment, non-absorption treatment, environmental pollution, etc., and achieve simple and convenient operation, thorough absorption, The effect of reducing leakage

CN110227328AActive Publication Date: 2019-09-13HUBEI DONGFANG CHEM IND
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-09-13

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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.
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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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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] see Figure 1-5 , the embodiment of the present invention provides a technical solution: a nitric acid flue gas absorption treatment method with high recovery rate, specifically comprising the following steps:

[0031] S1. Connect one end of the eighth connecting pipe 24 with the interior of the storage tank for dilute nitric acid loading, close the first air valve 25 provided inside the eighth connecting pipe 24, and open the third connecting pipe 7 an...