Industrial pilot test performance testing device and industrial pilot test performance testing method for SCR (selective catalytic reduction) denitration catalyst

Abstract

The invention relates to an industrial pilot test performance testing device and an industrial pilot test performance testing method for an SCR (selective catalytic reduction) denitration catalyst, aiming to solve the problem that an existing denitration catalyst testing device is incapable of simulating influences of load change on a catalyst during actual running. The industrial pilot test performance testing device comprises a testing device body comprising a gas distribution portion, a reaction portion and a measurement portion, wherein the gas distribution portion is communicated with a gas outlet of a coal economizer, and the reaction portion is communicated with a gas outlet of an air preheater. The testing device body achieves gas distribution and reaction of boiler tail gas through the gas distribution portion and the reaction portion, and the measurement portion is used for collecting and analyzing sample gas. The testing device body is arranged in a boiler tail gas system during actual industrial production, and the boiler tail gas serving as test gas of the testing device body enables flue gas for testing to have physicochemical and process properties of actual flue gas to produce influencing substances, so that reaction between the catalyst in the reaction portion with the flue gas for testing is guaranteed, and accurate and reliable test data are provided for research on running of the existing catalyst under the conditions of different temperatures and flue gas components.

Description

technical field [0001] The invention relates to the field of thermal power generation, in particular to the test of a desulfurization catalyst. Background technique [0002] With the planning and implementation of the national "West-to-East Power Transmission" project and the application of ultra-high-voltage power transmission technology in the power grid, the proportion of purchased electricity has increased significantly, and the load rate of thermal power units has decreased. In addition, after the ultra-low emission transformation of coal power units, the most stringent pollutant emission standards have been proposed. Whether the denitrification system can be put into operation at full load has become a key issue for whether the emission of nitrogen oxides can meet the standards. On the one hand, the SCR (Selective Catalytic Reduction Reactor) denitrification system designed at the original load will reduce the denitrification efficiency due to changes in various parame...

AI Technical Summary

Problems solved by technology

On the one hand, the SCR (Selective Catalytic Reduction Reactor) denitrification system designed at the original load will reduce the denitrification efficiency due to changes in various parameters of the flue gas at low loads, and even cause the SCR The system is out of operation, and it is difficult to meet the predetermined denitrification requirements; on the other hand, temperature changes and flue gas composition changes cause damage to the SCR catalyst originally designed for the load, resulting in a sharp reduction in catalyst life, thereby increasing the operating cost of the SCR system

How to make the denitrification system run at full load has become a worldwide problem, so it is necessary to study the operation status of existing catalysts at different temperatures and flue gas components, while domestic conventional denitrification catalyst test devices use natural gas Or gas distribution to simulate coal-fired flue gas for testing, and the test device can only conduct a small test on the small-sized catalyst after cutting, and cannot accurately reflect the actual working status of the full-scale catalyst. The test device with this structure is suitable for specific standards. Under certain conditions, the performance test of the catalyst when it leaves the factory and during operation cannot simulate the impact on the catalyst due to load changes during actual operation, nor can it simulate the actual flue gas humidity, heavy metals, alkaline earth metals, and halogen ions produced during coal combustion. The influence on the physicochemical and process characteristics of the catalyst brings inconvenience to the research

Images