Corner tangential boiler with thermal power flexibility adjusting function and adjusting method of corner tangential boiler

Abstract

The invention relates to a corner tangential boiler with a thermal power flexibility adjusting function and an adjusting method of the corner tangential boiler, in particular to the field of the corner tangential boiler. Combustors are divided into upper part combustors, middle part combustors and lower part combustors according to the mounting position levels, and are characterized in that the upper part combustors are combustors of a first layer and a second layer by counting from top to bottom of the boiler and the combustors of any one layer or two layers are peak-regulating combustors; the lower part combustors are combustors of a first layer and a second layer by counting from bottom to top of the boiler and the combustors of any one layer or two layers are peak-regulating combustors; the peak-regulating combustors are internal combustion type combustors; pulverized coal can be ignited in the combustors and can be combusted stably; other combustors are common combustors; and the common combustors are internal combustion type combustors or external combustion type combustors. The invention has the beneficial effects that thermal power operation flexibility and fuel flexibility of the boiler can be improved; the deep peak-regulating ability of the boiler is improved prominently; quick climbing ability is achieved; and the boiler can start / stop quickly.

Description

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

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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