Combustion and denitration running comprehensive optimization system of coal-fired unit boiler

Abstract

The invention relates to a combustion and denitration running comprehensive optimization system of a coal-fired unit boiler. The system comprises a combustion unit load obtaining module, a NOx emission load calculation module, an optimal result output module, a combustion wind amount control module and a running oxygen amount control module; the combustion unit load obtaining module is used for receiving loads of a combustion unit to be optimized; the NOx emission load calculation module is used for calculating the corresponding NOx emission loads according to the loads of the combustion unit to be optimized and the set multiple sets of combustion wind amounts and running oxygen amounts, and a combustion parameter control table is formed; the optimal result output module is used for obtaining the lowest NOx emission loads under the current load and outputting the corresponding combustion wind amount and the corresponding running oxygen amount; the combustion wind amount control module is used for receiving the combustion wind amount output by the optimal result output module and generating a first control signal for controlling the opening degree of a combustion air door; the running oxygen amount control module is used for receiving the running oxygen amount output by the optimal result output module and generating a second control signal used for controlling the running oxygen amount entering the combustion unit; compared with the prior art, the system has the beneficial effects of reducing the emission loads of the NOx, reducing the denitration cost and the like.

Description

technical field [0001] The invention relates to combustion control technology of a thermal power plant, in particular to a comprehensive optimization system for boiler combustion and denitrification operation of a coal-fired unit. Background technique [0002] Ammonia escape problem of flue gas denitrification system With the development of my country's power industry, NOx emissions are increasing day by day, and the pollution and impact of NOx have attracted more and more attention. The existing denitrification technical scheme is generally as follows: two newly built units all adopt low-nitrogen burners, one unit is equipped with a denitrification device, and the other one is reserved for the installation of gelatin. Tier + 1 reserved tier consideration. But this method is costly. With the continuous improvement of the country's environmental protection requirements and the increase of fuel costs, thermal power plants must pay more attention to their own economic perform...

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