Hexagonal tangential boiler capable of regulating thermal power flexibility and regulation method for hexagonal tangential boiler

Abstract

The invention relates to a hexagonal tangential boiler capable of regulating the thermal power flexibility and a regulation method for the hexagonal tangential boiler, and particularly relates to the field of the hexagonal tangential boilers. The hexagonal tangential boiler is characterized in that combustors in the boiler include peak-shaving combustors and common combustors; each peak-shaving combustor is an internal combustion type combustor inside which coal powder can be ignited and combusted stably; each common combustor is an internal combustion type combustor or an external combustion type combustor, wherein all lower layer combustors (A) are peak-shaving combustors; at least two of the upper layer combustors (C) are peak-shaving combustors; the other upper layer combustors (C) and middle layer combustors (B) are common combustors; or any two lines, three lines or four lines of combustors are peak-shaving combustors and the other lines of combustors are common combustors. The hexagonal tangential boiler disclosed by the invention has the beneficial effects of being improved in thermal power running flexibility and fuel flexibility and remarkably improved in peak shaving capability, having a rapid climbing capability, and being started / shut down quickly.

Description

Technical field [0001] The invention relates to a hexagonal tangential circle boiler with thermal power flexibility adjustment function and an adjustment method thereof, in particular to the field of hexagonal tangential circle boilers. Background technique [0002] In recent years, my country's wind power and photovoltaic installed capacity has grown rapidly, and the installed capacity in service and under construction has ranked first in the world. On the one hand, new energy sources such as wind power and photovoltaics provide us with a large amount of clean power. On the other hand, the randomness and instability of its power generation also brings 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. Some areas have encountered serious probl...

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

Images