Rotational flow coal powder combustor having multiple coal rank adaptability

Abstract

The invention discloses a rotational flow coal powder combustor having multi-coal rank adaptability. The combustor mainly consists of a central wind pipe, a secondary wind pipe, a tertiary wind pipe, a secondary wind rotational flow blade, a central wind pipe flaring, a primary wind pipe flaring, a secondary wind pipe flaring, and the like. According to the rotational flow coal powder combustor disclosed by the invention, the reasonable design of the flaring of the combustor is matched with the reasonable design of wind distribution pipelines, and staged combustion is formed, so that a large and stable central reflowing region is formed at an outlet of the combustor, and more coal powder can be gathered at the borders of the reflowing region; besides, the coal powder of which the particle diameters are high can rotate and reflow at the outlet of the combustor, so that the staying time of the large-particle-diameter coal powder in a high-temperature region at the outlet of the combustor is prolonged, and the purposes that the coal powder is on fire in time and is stably combusted are guaranteed; the designed rotational flow coal powder combustor disclosed by the invention is simple in structure and convenient to reform; through adjusting air distribution, all kinds of bituminous coal and anthracite coal can be efficiently fueled; and the designed rotational flow coal powder combustor disclosed by the invention is suitable for combusting mixed coal, and can be widely applied to various kinds of coal powder fueled by an industrial boiler, and the multi-coal rank adaptability of the industrial boiler is improved.

Description

technical field [0001] The invention relates to the technical field of combustion of various types of coal and mixed coal in an industrial pulverized coal boiler, and relates to a swirl pulverized coal burner adaptable to multiple types of coal. Background technique [0002] my country's primary energy is mainly coal, and my country is one of the countries with the most abundant coal reserves in the world. At present, small and medium-sized coal-fired industrial boilers are the main coal-consuming equipment in my country except power plant boilers. There are nearly 600,000 coal-fired industrial boilers in use, with an annual coal consumption of 640 million tons. High boiler efficiency. Different types of coal have different combustion characteristics, but in general, the design of pulverized coal burners is only for the combustion of pulverized coal of a specific type of coal. When the type of coal is changed, the burner is prone to poor combustion. adverse effect on boiler...

AI Technical Summary

Problems solved by technology

However, when the type of coal to be burned is changed, because the burner and boiler are not modified in time (boiler modification is expensive and time-consuming, generally the boiler and burner are not modified), the boiler combustion is unstable, the thermal efficiency is reduced, and even combustion occurs. Burnout of the device, slagging in the furnace, etc.

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