Tail gas absorption device for detecting performance of SCR (Selective Catalytic reduction) denitration catalyst and tail gas absorption method of tail gas absorption device

Abstract

The invention relates to a tail gas absorption device for detecting the performance of an SCR (Selective Catalytic reduction) denitration catalyst and a tail gas absorption method of the tail gas absorption device and belongs to the field of detection and evaluation of the performance of the SCR denitration catalyst. The tail gas absorption device comprises an absorption solution preparation and storage system, a tail gas absorption and control system and a waste solution storage and conveying system; a NaOH solution is used for simulating as a tail gas absorption solution for simulating fluegas; two absorption tanks and one control cabinet are arranged and are combined with signals including liquid levels of the absorption tanks and, the pH (Potential of Hydrogen) value and the like; supplementation of an absorption solution, emission of a waste solution in the absorption tanks and switching of the absorption tanks are realized by adopting a switching valuve control manner. Tail gasentering the absorption tanks is in sufficient contact with the absorption solution to react through an absorption tank bubbling device and an air flow disturbance mechanism; the tail gas absorption device is mainly used for absorbing pollutants including SO2, SO3 and, NO2 and the like in the tail gas, has the advantages that the stability of a system is strong, manual control and automatic control are combined to use, continuous operation can be realized, the pollutants including the SO2, the SO3 and, the NO2 and the like can be completely absorbed and the like, and has a relatively good application prospect.

Description

technical field [0001] The invention relates to the field of performance detection and evaluation of SCR denitrification catalysts, in particular to a tail gas absorption device and a tail gas absorption method for performance detection of SCR denitration catalysts. Background technique [0002] Domestic performance testing and evaluation of SCR denitrification catalysts mainly use pilot test benches or full-scale test benches. In order to truly reflect the situation of SCR denitrification flue gas in power plants, simulated flue gas is used, and its components include N 2 , O 2 , NO, NH 3 , SO 2 and water vapor, the contents of each component are distributed according to the actual flue gas conditions, such as the Chinese patent application number 201810050140.8. The remaining polluting gases in the tail gas after the denitrification reaction are NO, NO 2 , NH 3 , SO 2 and SO 3 , where NO, NO 2 , NH 3 and SO 3 content is low, SO 2 The content is relatively high, ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to aim at the tail gas absorption of current SCR denitrification catalyst performance detection test simulation flue gas and exist absorption device too simple, SO 2 , SO 3 , NO 2 In order to solve the problems of poor absorption effect of pollutants, low utilization rate of absorption liquid, and improper disposal of waste liquid, a tail gas absorption device and its tail gas absorption method for SCR denitrification catalyst performance testing are proposed, as follows:

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