Opposed firing boiler with thermal power flexibility regulating function and regulating method thereof

Abstract

The invention relates to a boiler with a thermal power flexibility regulating function and a regulating method thereof, in particular to the field of opposed firing boilers. The boiler is characterized in that upper burners are burners located on the first layer and the second layer from the top of the boiler; in the upper burners, the front wall and the back wall which are located on the same layer are both provided with the burners, and the burners located on the uppermost layer are set to be peak regulating burners; lower burners are burners located on the first layer from the bottom of the boiler; in the lower burners, any burners on the front wall and/or the back wall are peak regulating burners; the peak regulating burners are internal burning type burners, coal powder can be ignited in the peak regulating burners, and stable burning can be achieved; and the other burners are ordinary burners which are internal burning type burners or external burning type burners. The boiler with the thermal power flexibility regulating function has the beneficial effects that the thermal power operation flexibility and the fuel flexibility of the boiler can be improved, the deep peak regulating capacity of the boiler is remarkably improved, the rapid climbing capacity is achieved, and the boiler can be rapidly started or stopped.

Description

technical field [0001] The invention relates to a boiler with thermal power flexibility adjustment function and an adjustment method thereof, in particular to the field of opposing combustion boilers. Background technique [0002] In recent years, my country's wind power and photovoltaic installed capacity has grown rapidly, and the installed capacity both in service and under construction has ranked first in the world. On the one hand, new energy sources such as wind power and photovoltaics have provided us with a large amount of clean electricity; on the other hand, the randomness and instability of their power generation output have also brought great challenges to the safe operation of the power system and the guarantee of power supply. [0003] Judging from the current situation, the regulation capacity of my country's power system is difficult to fully meet the requirements of large-scale development and consumption of new energy, and serious problems of abandoning win...

AI Technical Summary

Problems solved by technology

[0007] 1) The peak shaving capacity is generally maintained at the design value of 40%-50% of the rated load, and the deep peak shaving below 40% of the rated load cannot be carried out, or during the deep peak shaving process, the furnace temperature drops, the pulverized coal is difficult to ignite, and the flame is stable Poor performance, easy to extinguish the fire, there is a major accident hidden danger of fire extinguishing and blasting in the furnace;

[0008] 2) During the low-load peak-shaving process, the flue gas temperature does not meet the requirements of the denitrification system, which reduces the denitrification effect, and then adopts the method of opening or installing an economizer bypass to make the flue gas temperature meet the requirements, thus sacrificing the boiler efficiency;

[0010] 4) During the low-load peak-shaving process, the combustion in the furnace is unstable and cannot adapt to fuel changes, which may easily cause serious fluctuations in the positive and negative pressures in the furnace

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