Air channel ignition system and ignition burner under bed

Abstract

The invention discloses an ignition burner under a bed and an air channel ignition system. The disclosed ignition burner under the bed comprises an air replenishing channel, a burning air channel and an air distribution channel, the air replenishing channel is communicated with the burning air channel, the back end of the air distribution channel is communicated with the front end of the burning air channel, the ignition burner also comprises a burner body and an ignition device with an ignition end which stretches into the burner body; an internal combustion segment is formed in the burner body, the front end of the internal combustion segment is communicated with a pulverized coal channel, and the back end of the internal combustion part is communicated with the front end of the burningair channel. Compared with the prior art, in the ignition burner under the bed, bed material is heated by the heat which is generated by burning of pulverized coal, thereby realizing the start of a circulating fluidized bed boiler, and the fuel oil consumption during the start of the circulating fluidized bed boiler can be reduced.

Description

technical field [0001] The invention relates to a boiler ignition technology, in particular to an under-bed ignition burner, and an air duct ignition system including the under-bed ignition burner, which is used for starting a circulating fluidized bed boiler. Background technique [0002] At present, China is the country with the largest number of circulating fluidized bed (CFB) boiler generator sets, the largest total installed capacity and the fastest development speed in the world. At present, more than 3,600 circulating fluidized bed boiler generator sets have been put into use, with a maximum unit capacity of 600MW; the total installed capacity is about 70-80 million kilowatts. Among them, more than 200 circulating fluidized bed boiler generator sets of 135-150MW (440-480t / h) have been put into operation and are planned to be built; 300MW circulating fluidized bed generator sets have been put into operation and are planned to be built Also more than 60 units. [0003...

AI Technical Summary

Problems solved by technology

During the start-up and commissioning process of the circulating fluidized bed boiler, it is necessary to adjust the atomizing sheet several times to improve the atomization effect of the fuel oil, which makes the starting and debugging process of the circulating fluidized bed boiler very cumbersome; When the fuel atomization reliability is not high and the fuel atomization effect is not good, it is easy to cause oil droplets to fall into the combustion air duct 008, which not only causes fuel waste, but also affects the normal start-up of the circulating fluidized bed boiler

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