Full-size performance evaluating system for SCR denitration catalyst

Abstract

The invention discloses a full-size performance evaluating system for an SCR denitration catalyst. The full-size performance evaluating system for the SCR denitration catalyst is characterized by comprising a control system as well as a gas supply system, a water replenishing system, a SO3 generation system, a NO generation system, a gas distribution system, a heating system, a reacting system, ananalyzing system and a tail gas treatment system which are connected with the control system, the output end of the gas supply system is connected with the gas distributing system, the output end ofthe gas distributing system is connected with the heating system, the input end of the heating system is connected with the water replenishing system, the SO3 generation system and the NO generation system, the output end of the heating system is connected with a mixing system, a first input end of the reacting system is connected with the mixing system, a second input end of the reacting system is connected with the analyzing system, and the output end of the reacting system is connected with the tail gas treatment system. The selectivity and sulfur tolerance of the catalyst under various low-temperature smoke conditions can be tested in a simulated manner under the working condition of smoke. The full-size performance evaluating system for the SCR denitration catalyst is provided with the tail gas treatment system, therefore, polluted gas of the smoke can be treated effectively, and the environment is protected.

Description

technical field [0001] The invention relates to a performance evaluation device for a denitration catalyst, in particular to a full-scale performance evaluation system for an SCR denitration catalyst. Background technique [0002] At present, the traditional devices for evaluating SCR denitration catalysts are mainly powder evaluation devices and small honeycomb evaluation devices (the full-scale denitration catalyst unit is cut into small honeycombs with 3*3 holes or 4*4 holes, and the length is 200-300mm). The performance obtained cannot meet the needs of real working conditions, so there is an urgent need for a full-scale performance evaluation system for SCR denitration catalysts that is energy-saving, efficient, accurate and can meet the actual needs of different industries. [0003] Catalyst performance evaluation must consider the actual on-site reactor working conditions, including temperature, flow rate, NOx concentration (NO and NO 2 ), SO 2 Concentration, oxygen...

AI Technical Summary

Problems solved by technology

At the same time, the denitrification reaction is affected by external diffusion and internal diffusion. In the on-site denitrification reactor, within 200-300mm of the entrance of each layer of catalyst, the flue gas is in a turbulent state, and the external diffusion is very sufficient, which can ensure that the pollutant NO x and reducing agent NH 3 Fully in contact with the catalyst; after the back end of the inlet, the gas is mainly in the advection state, and the external diffusion efficiency is very slow, reducing the pollutant NO x and reducing agent NH 3 Catalyst contact speed, while the powder evaluation device and the small cell evaluation device are in a turbulent state throughout the reaction, the pollutant NO x and reducing agent NH 3 Able to fully contact the catalyst and not be affected by out-diffusion, so it cannot meet the conditions of on-site reactor conditions

Moreover, the powder and small honeycomb evaluation devices generally only pass through NO, O 2 , NH 3 and N 2 , a small part will join H 2 O and SO 2 , unable to meet the actual flue gas parameters, the overall evaluation results deviate from the actual performance of the catalyst, and there is a lack of performance evaluation on the potential, life, and reproducibility of the catalyst

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