Variable-pressure and variable-working-condition oil burning nozzle

Abstract

The invention provides a variable-pressure and variable-working-condition oil burning nozzle. The variable-pressure and variable-working-condition oil burning nozzle is a technical burning nozzle which is adapt to high-pressure environments, applicable to coal gasifiers, provided with igniting and burning capabilities in an operation process with random fixed pressure, variable pressure and continuous variable working conditions in a pressure range of 0-2.0MPaG, and used for igniting the coal gasifiers. The burning nozzle comprises body sleeves and a premix jet flow head. The body sleeves are in coaxial arrangement and include a liquid fuel outer sleeve, an atomizing agent outer sleeve and an oxidizing agent outer sleeve sequentially from inside to outside, and an annular space between each two sleeves form a medium passage. The premix jet flow head comprises inner and outer contraction type sonic or subsonic nozzles and two-level atomizing and mixing chambers and capable of realizing efficient atomizing and mixing of fuels and oxidizing agents and stable ignition and combustion. A double-layer closed annular passage cooling structure is arranged on the outermost layers of the head and the body of the burning nozzle, the burning nozzle is hermetically connected with a coal gasifier body through a mounting flange, and tightness and ablation avoidance of the burning nozzle under the furnace pressure of 0-8MPaG and at the furnace temperature of 1200-1700DEG C can be guaranteed.

Description

technical field [0001] The invention relates to an oil burner, in particular to a new type of start-up burner which is used in a gasification furnace and can adapt to variable pressure and variable working conditions in a high-pressure environment. Background technique [0002] Efficient and clean coal gasification technology is the mainstream of coal gasification technology development in my country today. The industrialized coal gasification technology mainly includes pulverized coal pressurization and coal-water slurry gasification. [0003] The gasifier is the key equipment for coal-water slurry gasification and pulverized coal pressurized gasification technology, and the start-up process of the gasifier is usually completed by the start-up burner. [0004] When the coal-water slurry gasifier is started, the start-up burner is under the condition of slight negative pressure and normal pressure. When the temperature in the furnace reaches the feeding temperature, the star...

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Problems solved by technology

[0004] When the coal-water slurry gasifier is started, the start-up burner is under the condition of slight negative pressure and normal pressure. When the temperature in the furnace reaches the feeding temperature, the start-up burner is removed, and the refractory brick and the start-up burner blind flange are installed at the same time. The gasifier can only be fed and started, and the ignition method is manual ignition. Therefore, the entire start-up and ignition process is cumbersome to operate, low in automation, easy to turn off and difficult to detect, labor-intensive for workers, and poor safety for on-site operators

[0005] When the pulverized coal pressurized gasifier is started, the start-up burner can realize variable pressure and variable working condition load adjustment within a certain pr

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