Heat pipe type SCR denitration reactor and low-temperature sulfur-containing flue gas denitration method thereof

Abstract

The invention relates to a heat pipe type SCR denitration reactor and a low-temperature sulfur-containing flue gas denitration method thereof. A flue and a heat source medium channel which are horizontally arranged up and down are arranged in a reactor body, a heat insulation layer is arranged between the flue and the heat source medium channel, a heat pipe array is vertically arranged in the reactor body, the middle portions of heat pipes penetrate through the heat insulation layer, a condensation section and an evaporation section of the heat pipe are located in the flue and the heat source medium channel respectively, and a denitration catalyst layer of a porous structure is arranged outside the condensation section of the heat pipe. During operation, the temperature of a heat source medium needs to be higher than the temperature of flue gas, the requirement for the working temperature of the catalyst is met, the catalyst in the flue is maintained in a high-activity and high-sulfur-resistance temperature window by means of the characteristics of fast heat transfer and good axial temperature uniformity of the heat pipe, stable low-temperature flue gas denitration can be achieved even if a traditional medium-temperature SCR catalyst is adopted, high energy consumption of a conventional process for overall reheating of low-temperature flue gas is avoided, and in-situ continuous regeneration of the catalyst can be achieved by increasing the operation temperature of a heat source medium channel after the catalyst is inactivated at low temperature.

Description

Technical field [0001] The present invention relates to a heat pipe type SCR denitrifact reactor and its use in a low temperature sulfur-containing flue gas denitration method, belonging to the field of flue gas treatment. Background technique [0002] Nitrogen oxides are one of the main atmospheric pollutants, causing acid rain, photochemical smoke, etc., affecting environmental quality, harming human health. Therefore, governance of nitrogen oxides is the focus of atmospheric pollution control. With the comprehensive popularity, coking, steel sintering, ceramics and glass firing, cement manufacturing, etc., have become an important component of fixed source emissions, causing more and more attention. Catalysts used in conventional selective catalytic reduction (SCR) denitration can be operated for a long time in 300 ° C. For the above sects, since the flue gas temperature is generally less than 250 ° C, there is a certain catalyst toxic, and the conventional catalyst uses two m...

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Problems solved by technology

[0005] The object of the present invention is to provide a heat pipe type SCR denitrification reactor with a long service life of the catalyst and convenient continuous regeneration in situ, so as to solve the problem of low SCR denitrification efficiency of low-temperature flue gas from industrial furnaces and kilns in the prior art. Vulnerable technical issues

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