A gasification nozzle

Abstract

A gasification nozzle, which comprises a central oxygen nozzle, a coal-water slurry nozzle and an epoxy nozzle that are concentrically arranged from the inside to the outside, wherein the end section of the central oxygen nozzle is relative to the inner diameter of the end section of the coal-water slurry nozzle. The shrinkage is 20mm-100mm; the inclination angle of the epoxy nozzle is 20°-50°; the inclination angle of the outer side of the coal-water slurry nozzle is 30°-70°, and the inclination angle of the inner side is 30°-80°; the center The outside inclination angle of the oxygen nozzle is 30°-70°; a first locator is arranged in the epoxy channel, and a second locator is arranged in the coal-water slurry channel, and the top of the first locator is in the shape of a swirl sheet, so The included angle between the top and the feeding direction of oxygen is 20°-60°. When the gasification nozzle of the invention is used for gasification, the gasification effect of the coal-water slurry is better, the maximum production load of the gasification nozzle is increased, and the service life of the gasification nozzle is longer.

Description

technical field [0001] The invention relates to a gasification nozzle, in particular to a gasification nozzle used in a coal-water slurry gasification furnace. Background technique [0002] With the rise of global oil prices, the preparation of chemical raw materials from coal has attracted more and more attention from various countries. Among them, coal gasification, as an important part of clean coal technology, has a leading position. It converts cheap coal into clean gas that can be used to produce chemicals. Coal gasification technology is one of the key technologies of coal chemical industry. At present, most of the gasifiers operated by domestic coal chemical enterprises use coal water slurry as raw material to prepare syngas. Coal water slurry is made of coal with a certain particle size (about 65%), water (34%) and a small amount of chemical additives. It is a slurry fuel that can be pumped, atomized, stored and stably burned like oil. The value is equivalent to ...

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Problems solved by technology

[0003] The activity of lignite is relatively good, which is beneficial to the gasification of the gasifier and can reduce the residual carbon content of the slag. However, lignite is a coal with a low degree of metamorphism. , when the coal water slurry gasifier is used to gasify lignite, due to the poor slurryability of lignite, the concentration of the prepared coal water slurry is usually lower than 60wt%, and the viscosity of the coal water slurry is relatively high, resulting in the use of existing There are the following problems when the gasification nozzle is used to gasify lignite with low metamorphism degree to produce synthesis gas: (1) the atomization effect of the gasification process nozzle is not good, the content of active components in the synthesis gas is low, and the carbon conversion rate is low; (2) ) The load of the gasifier is low; (3) The service life is short

Chinese patent No. 95111750.5 discloses a three-passage coal-water slurry gasification nozzle with a swirler, but the gasification nozzle disclosed according to the invention is only used for the coal-water slurry fuel with a concentration of 58-80wt%. Get a good gasification effect

Especially under the condition of the same concentration, the viscosity of coal water slurry made from coal with low degree of metamorphism is relatively high, so the existing gasification nozzle cannot obtain better gasification effect

Therefore, it is necessary to develop a gasification nozzle suitable for gasification of low metamorphic coal to overcome the defect that the existing gasification nozzle is not suitable for low metamorphic coal

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