Low-load stable burning pulverized coal external heating smoke heating type turbulent burner and heating method

Abstract

The invention relates to a low-load stable burning pulverized coal external heating smoke heating type turbulent burner and a heating method. The boiler side in the prior art has the main problems that under low loads, the coal burning quantity in a boiler is low, the hearth temperature is low, and instable burning happens. The burner comprises a turbulent burner body, the turbulent burner body comprises a center air channel (1), a primary air channel (2) is arranged on the outer layer of the center air channel, stable burning teeth (13) are arranged at the position, close to a spray opening,of the left end of the primary air channel, the right end of the primary air channel is connected with a primary air supply pipeline, a heating casing pipe (4) and an air box (5) are sequentially arranged on the outer layer of the right half segment of the primary air channel, the left end of the heating casing pipe is blocked by a heating casing pipe end baffle (9), the upper side of the right end of the heating casing pipe is connected with a heating casing pipe smoke inlet (3), and the lower side of the right end of the heating casing pipe is connected with a heating casing pipe smoke outlet (15). The low-load stable burning pulverized coal external heating smoke heating type turbulent burner is achieved.

Description

Technical field: [0001] The invention relates to the technical field of power station boiler combustion equipment, in particular to a smoke-heated swirl burner and a heating method for external heating of low-load stable combustion of pulverized coal. Background technique: [0002] With the rapid development of clean energy such as wind power and photovoltaics, and the rapid growth of installed capacity, clean energy such as wind power and photovoltaics provides a large amount of clean power, but also has intermittent, volatility, randomness, and reactive power supply performance. Low, short-term short-circuit current capability is weak, etc., which cannot be completely absorbed by my country's power system, which brings huge challenges to the safety and stability of the power system; [0003] The National Energy Administration requires flexible transformation of thermal power units to release their potential deep peak shaving capabilities to improve the regulation capacity of China...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of clean energy such as wind power and photovoltaics, and the rapid growth of installed capacity, while clean energy such as wind power and photovoltaics provides a large amount of clean power, there are intermittent, fluctuating, random, and reactive power supply performances. The characteristics of low and short-term short-circuit current supply capacity are weak, which cannot be completely absorbed by my country's power system, which brings a huge challenge to the safety and stability of the power system;

[0003] The National Energy Administration requires flexible transformation of thermal power units to release their potential deep peak-shaving capabilities, so as to improve the regulation capacity of my country's power system and promote the consumption of renewable energy. However, when coal-fired units perform deep peak-shaving, Since the unit is in a low-load operation state with a huge difference from the design load, many problems will occur. The main problem on the boiler side of the prior art is that under low load, the amount of coal burned in the furnace is low, and the furnace temperature is low, resulting in unstable combustion. Case

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