Flue gas denitration flow field simulation checking method and system

Abstract

The invention provides a flue gas denitration flow field simulation checking method and system. The method comprises the following steps of: establishing a flow field model based on field working conditions, meteorological data of a site where equipment is located and the structure size of target denitration SCR equipment; according to preset pre-simulation basic data, the flow field model and a simulation equipment operation result, obtaining current simulation data; comparing the similarity between the current simulation data and an actual operation result with a similarity threshold value; if the similarity accords with the similarity threshold value, outputting the pre-simulation basic data corresponding to the simulation result, the actual operation result and the current simulation data to obtain a check result; if the similarity does not accord with the similarity threshold value, calculating optimal pre-simulation basic data according to a threshold value deviation result, simulating an equipment operation result again after performing updating, so as to generate a new current simulation database, and repeating the comparison of the similarity with the similarity threshold value until obtaining a new check result. The method is reasonable in scheme, rapid in simulation, and accurate in checking and can facilitate subsequent data optimization and structural design.

Description

technical field [0001] The invention relates to the technical field of flue gas denitrification, in particular to a method and system for simulating and checking a denitrification flow field. Background technique [0002] The SCR denitrification technology is currently widely used in the environmental protection devices of thermal power units. The reducing agent ammonia injected through the ammonia injection grid reacts with the nitrogen oxides in the flue gas under the action of the catalyst, thereby realizing the removal of nitrogen oxides in the flue gas. Therefore, the mixing of ammonia gas and main flue gas is very important for the stable operation of SCR equipment. In addition, after the ultra-low emission transformation of domestic units, the denitrification efficiency index has been further improved, and the transformation route such as precise ammonia injection has been proposed, and higher requirements have been placed on the main flue gas flow field and the unifo...

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Problems solved by technology

However, this method does not involve the calibration calculation process, and there is still room for improvement in the accuracy of the simulation results

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