Cold state ignition under tiny oil, and steady burning burner in ultra low load

Abstract

The invention discloses the 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 and the oil combustor are 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 (2-5t / h) and its oil saving ration is above 95%; 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 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 modification of...

AI Technical Summary

Problems solved by technology

But there are following deficiencies in this technology: (1) small oil gun ignition cannot be used when the boiler cold furnace starts

(2) The ignition of the small oil gun still cannot solve the problem of using the electrostatic precipitator when the boiler is started

(3) When the boiler operates under ultra-low load conditions, the stable combustion capability of the small oil gun is insufficient

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