W-type combustion boiler with thermal power flexibility adjusting function and adjusting method of boiler

Abstract

The invention relates to a W-type combustion boiler with a thermal power flexibility adjusting function and an adjusting method of the boiler. The boiler is characterized in that combustors can be divided into front arch combustors and rear arch combustors according to installation positions and types; the front arch combustors comprise front arch common combustors and front arch peak regulation combustors, and the rear arch combustors comprise rear arch common combustors and rear arch peak regulation combustors; one or two front arch peak regulation combustors are arranged in the front arch combustors every two or three front arch common combustors; one or two rear arch peak regulation combustors are arranged in the rear arch combustors every two or three one or two rear arch common combustors; the rear arch peak regulation combustors correspond to the front arch common combustors, and the rear arch common combustors correspond to the front arch peak regulation combustors. The combustion boiler has the advantages that thermal power operation flexibility and fuel flexibility of the boiler can be improved, the deep peak regulation capacity of the boiler is obviously improved, the quick gradeability is achieved, and the boiler can be quickly started and stopped.

Description

technical field [0001] The invention relates to a W-type combustion boiler with thermal power flexibility adjustment function and an adjustment method thereof, in particular to the field of W-type 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 o...

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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