Boiler large-chamfer four-corner tangential firing technology and furnace arrangement method

Abstract

The invention relates to a boiler large-chamfer four-corner tangential firing technology and a furnace arrangement method. The boiler large-chamfer four-corner tangential firing technology and the furnace arrangement method are characterized in that a whole furnace is sequentially divided into a cold ash bucket area, a lower furnace area and an upper furnace area from bottom to top, the lower furnace area is divided into a lower burner area and an upper burner area from bottom to top, the lower burner area and the cold ash bucket area are both provided with a first transition area, the lower furnace area and the upper furnace area are both provided with a second transition area, and four burners are arranged on four wider furnace corner chamfer surfaces in the lower furnace area in a four-corner tangential manner. By adopting large chamfers in furnace corner areas, wall surface areas for arranging the burners are increased substantially, the distance between a water wall of each furnace corner area and an outer edge surface of a rotating burning flame is shortened to a greater degree, jet distance of each burner is decreased, and part of burner energy consumption is saved. Moreover, thermal loads subjected by the water walls in the furnace corner areas are more approximate to an average thermal load, and uneven heating of the water walls in the furnace width or depth direction is improved to a greater degree.

Description

technical field [0001] The invention relates to a combustion technology and a furnace layout method using a boiler with large cut corners and four corner cut circles. Background technique [0002] my country is a country where coal is the main energy source. Coal-fired boilers in power stations consume nearly 530 million tons of coal each year, accounting for about 80% of the country's coal consumption. At the same time, my country's thermal power industry accounts for more than 70% of the total installed capacity in the power structure. How to further improve the efficiency of coal power generation has very positive significance for building an energy-saving society and fulfilling my country's commitment to reduce greenhouse gas emissions. In order to save energy and reduce environmental pollution, circulating fluidized bed (CFBC), pressurized fluidized bed combined cycle (PFBC), integrated gasification combined cycle (IGCC), supercritical (SC) and ultra-supercritical ( ...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a furnace layout method that adopts the boiler large-cut corner and four-corner tangential combustion technology to reduce the influence of uneven heating of the furnace

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