Cold static ignition under meagre coal and tiny oil, and steady burning burner in ultra low load

Abstract

The invention discloses the lean coal micro-oil cold ignition and super-low load stable combustor. It comprises the coal powder pipe with the primary powder combustion chamber and the secondary powder combustion chamber connected with in; the oil combustion chamber is obliquely equipped at the front end of the primary powder combustion chamber; the secondary powder combustion chamber and one end of the coal powder pipe connect the third grade powder combustion chamber; the cooling air intake pipe is outside of the powder pipe and the third grade powder combustion chamber; the multiple circumferential welded air films are between the third powder combustion chamber and the cooling air intake tube; the other end of the powder pipe has the coal powder strong concentrator. The invention uses 50-70kg / h oil through energy level amplifying principle to light large amount of coal powder and its oil saving ration is above 90%; it has the low load stable combustion function and can be used to electric dusting as soon as the boiler ignition; the ignition system is reliable and the investment is low.

Description

technical field [0001] The invention relates to a combustion device, in particular to a low-coal and micro-oil cold-state ignition and ultra-low-load stable combustion burner. Background technique [0002] Large-scale power plant boilers consume a lot of oil for ignition and low-load stable combustion. A 200MW boiler consumes about 50-70 tons of oil per cold furnace lift, a 300MW boiler consumes about 80-100 tons of oil, and a 600MW boiler About 200-250 tons of oil will be consumed. According to statistical data, about 1.5-1.8 million tons of fuel oil is needed to raise and ignite the boiler each year, equivalent to RMB 4.5-5.4 billion. In terms of low-load combustion-supporting oil, as the capacity of the power grid increases, the peak-to-valley difference in the power grid intensifies, and many units operate under low-load and ultra-low-load conditions during the evening power consumption valley, although with the development of combustion technology, After the burner mo...

AI Technical Summary

Problems solved by technology

For coal-fired boilers with low volatile content such as lean coal, cold furnace ignition and ultra-low-load stable combustion have not yet been realized, and these fuel-saving technologies themselves have considerable defects that have not been resolved.

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