Oxygen-enriched burning device burning inferior coal

Abstract

The invention relates to an oxygen-enriched burning device burning inferior coal. The device comprises oxygen-enriched nozzles, an outer sleeve, a sliding device, oxygen-enriched channels, an inner sleeve and a burning part, wherein the burning part, the inner sleeve and the outer sleeve are distributed in a concentric circle way, and the burning part is arranged at the innermost layer. The oxygen-enriched channel consists of a heat-resisting pipe and a ceramic pipe, and the ceramic pipe is sleeved in the heat-resisting pipe; and the oxygen-enriched channels are nested and fixed in the sliding device and can slide radially between the inner and the outer sleeves. The sliding device is composed of a sliding block fixed on the heat-resisting pipe, an outer chute fixed on the outer sleeve and an inner chute fixed on the inner sleeve. More than two oxygen-enriched channels are uniformly distributed between the inner and the outer sleeves; and a group of oxygen-enriched nozzles are arranged on each oxygen-enriched channel. The oxygen-enriched nozzles are arranged at the outlets of the oxygen-enriched channels, and each oxygen-enriched nozzle has a 15-75-degree angle with the axis of the burning part. The device solves the problems of unstable burning, low burning intensity and narrow adaption range of coal when the inferior coal is used on a furnace and a kiln, thereby improving the burning efficiency of the inferior coal.

Description

technical field [0001] The invention relates to an oxygen-enriched combustion device for burning low-quality coal, and belongs to the field of low-quality fuel combustion equipment. Background technique [0002] At present, the fuels used by major furnaces and kilns in my country are mostly high-quality bituminous coal and lignite. However, due to factors such as uneven distribution, high transportation costs and rising prices, more manufacturers have turned their attention to the use of low-quality coal. Using the principle of oxygen enrichment to solve the problem of coal combustion is a relatively advanced and mature method at present. [0003] The high-temperature oxygen-enriched air ignition method and device for a pulverized coal boiler proposed in the publication number CN1752524A patent document proposes that the pulverized coal is divided into three strands: a small strand of pulverized coal enters the ignition chamber, meets and mixes with the oxygen-rich oxygen i...

AI Technical Summary

Problems solved by technology

This device can burn low-quality coal very well, but the oxygen-enriched channel is too single, which cannot ensure sufficient and uniform mixing with primary air and coal powder, and is not very adaptable to coal types

[0006] It can be seen from the above that the idea of ​​using oxygen-enriched coal to ignite and stabilize combustion is very mature, but the device needs to be further improved, and there are few studies on using oxygen-enriched coal to burn low-quality coal

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