Direct flow oil-saving burner faulty coal for combustion

Abstract

The invention discloses a bad fuel coal oil-saving direct current burner, comprising coal powder combustion chamber, where the front end of the coal powder combustion chamber is provided with an impact coal powder concentrator, a primary combustion chamber is arranged in the coal powder combustion chamber, plural oil combustion chambers are arranged outside the middle of the primary combustion chamber, a small-oil quantity oil combustor is arranged in the oil combustion chamber, the tail of the primary combustion chamber is connected with the secondary combustion chamber, and heat storage fireproof heat-insulating material is laid in a heat storage coal powder stable combustion chamber. The advantages are using less oil to ignite large amount of coal powder, and oil-saving above 95%; stable combustion function; good environmental protection; high efficiency.

Description

technical field [0001] The invention relates to a combustion device, in particular to a direct-flow oil-saving burner for burning low-quality coal (including low-quality bituminous coal, lean coal and anthracite). Background technique [0002] Large-scale power plants using low-quality coal boilers consume a huge amount of oil for ignition and ultra-low-load stable combustion. Generally, a 200MW boiler consumes about 150-200 tons of oil for one cold furnace raise, and a 300MW boiler consumes about 200-300 tons of oil. It is a newly built unit, generally a 300MW newly built boiler, which consumes 1500-2500 tons of oil during the commissioning stage. According to statistics, the fuel consumption of power plant boilers is about 1.8-2 million tons of fuel oil each year, equivalent to about 8-10 billion yuan. [0003] Oil is a scarce strategic resource in my country. The Department of Resource Conservation and Comprehensive Utilization of the State Economic and Trade Commission ...

AI Technical Summary

Problems solved by technology

[0004] Plasma oil-free ignition technology and low-oil ignition technology have been successfully developed in China, but these technologies are only used for high-volatile bituminous coal, and cannot be applied to low-quality bituminous coal, lean coal and anthracite coal

Moreover, the plasma oil-free ignition technology system is more complicated, the investment cost is high, and the reliability is not high; the pulverized coal combustion rate is low (about 50%) in the cold furnace ignition stage of the oil-less ignition burner, the fly ash combustibles are high, and the boiler efficiency is low. Low, it is easy to produce secondary combustion, which has a great impact on subsequent equipment such as economizers and dust collectors, and because the burner has no stable combustion function, it must be injected with oil to stabilize combustion when the load is generally lower than 60%, which also consumes a lot of energy. Combustion oil

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