Garbage incineration denitration reaction dynamic control method and system based on big data technology

Abstract

The invention discloses a waste incineration denitration reaction dynamic control method based on a big data technology, and the method comprises the steps: collecting the working condition data of an incinerator through a special server, and carrying out the unified standardization processing of effective data in the working condition data; the special server identifies the working parameter of the optimal ammonia escape amount under each working condition, and replaces the working parameter of the original optimal ammonia escape amount with the working parameter of the smaller ammonia escape amount when the ammonia escape amount smaller than the optimal ammonia escape amount appears; the special server uploads the optimal working parameters to a universal server; and according to the temperature in the hearth and the escape amount of ammonia at the outlet when the incinerator operates in real time, the working parameters under the optimal ammonia escape amount are called, and according to the optimal working parameters, the working parameters of the nozzle, the types of reducing agents and the concentration of the reducing agents are adjusted, so that real-time dynamic control over the concentration of NOx and NH3 at the outlet of the garbage incinerator is achieved. According to the invention, up-to-standard emission of NOx and NH3 at an outlet is realized

Description

Technical field [0001] The invention relates to the technical field of SNCR flue gas denitration in waste incineration power plants, and in particular to a dynamic control method and system for waste incineration denitration reaction based on big data technology. Background technique [0002] Waste incineration power generation is currently the most effective way to treat waste, but NO will be produced during the incineration process. x Direct emission of harmful gases such as flue gases will cause secondary pollution to the atmospheric environment, so the flue gas needs to be denitrified. Selective Non-Catalytic Reduction (SNCR) does not require a catalyst and the denitrification device has a simple structure. Currently, this denitrification method is commonly used in newly built or renovated waste incineration power plants in China. [0003] The principle of SNCR denitrification is: spray a certain concentration of reducing agent solution (urea or ammonia) into the furnac...

AI Technical Summary

Problems solved by technology

This automatic control method has the characteristics of time lag, and it is difficult to adjust the flow rate of the reducing agent in time and accurately when the incineration working conditions change, resulting in NO x Concentration fluctuations are obvious, and NH 3 escape hazard

On the other hand, due to the large change of waste composition and unstable calorific value, the temperature changes at different positions of the furnace at different times are caused, so the optimal reaction temperature window also changes within a certain range of positions, which affects the denitrification efficiency.

The existing industry generally adjusts the working status of the nozzle manually according to the working conditions on site and combined with work experience. It may cause excessive NOx emissions if the operation is not timely, and it is a fixed nozzle that cannot adjust the direction.

For example, the monitoring method of waste incineration provided by Ni Jinfei et al. in the Chinese Invention Publication Patent "Monitoring Method and Device for Waste Incineration" can predict the amount of ammonia escape at the outlet according to the working conditions in the furnace, but there are still lags and delays question

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