A kind of ultra-low nitrogen combustion method of coal-fired generating set

Abstract

The invention relates to a ultra-low-nitrogen combustion method of a coal-fired power generating set. The ultra-low nitrogen combustion method is characterized by comprising the following steps that acoal-fired boiler coal powder controllable high-temperature pre-pyrolysis device is arranged; a pyrolysis air powder gas-solid separation device is arranged, a coal-fired boiler coal powder controllable high-temperature pre-pyrolysis temperature control system is arranged and a coal-fired boiler ultra-low nitrogen combustion control system is arranged; and the technical bottleneck that NOx emission of an existing coal-fired boiler cannot be greatly reduced is broken through, and stable, reliable and safe work of different coal types, different output forces and different working conditions can be met. The method is scientific and reasonable, strong in applicability and good in effect, the pollution of the coal-fired power generator set to the environment can be reduced, and the clean andefficient utilization of coal is realized.

Description

technical field [0001] The invention relates to a coal-fired generating set, and relates to an ultra-low-nitrogen combustion method for a coal-fired generating set. Background technique [0002] Coal resources are still the main energy source in the world today, and coal-fired power generation units will still occupy the main position in the power generation system for a long period of time in the future due to their advantages of controllability, stability and safety. The main problem brought by coal-fired power generation units is the emission of pollutants during the combustion process, the main pollutant of which is NO x . Coal-fired generator set NO x The amount of emissions depends to a large extent on the combustion method of the boiler, so coal-fired generating units urgently need to achieve ultra-low nitrogen combustion. [0003] At present, it is difficult to achieve low NO with the low nitrogen combustion method of most coal-fired generating units x At the sam...

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Problems solved by technology

[0003] At present, it is difficult to achieve low NO with the low nitrogen combustion method of most coal-fired generating units x At the same time, higher requirements are put forward for boiler combustion coal, combustion process control, combustion load, etc. In addition, some low-nitrogen combustion methods are relatively complicated and difficult to achieve engineering applications

For the ultra-low nitrogen combustion of coal-fired generating units, there is no complete, effective and general method

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