Cyclone combustion device, combustion equipment and combustion method

Abstract

A cyclone combustion apparatus, a combustion device, and a combustion method. The cyclone combustion apparatus comprises a cyclone cylinder (1), a primary air pipe (2), a secondary air pipe (3), and a flue gas discharging pipe (5). The cyclone cylinder (1) is vertically arranged and is provided with a cyclone combustion chamber, a primary air nozzle, a secondary air nozzle, a flue gas outlet, and a slag capturing port (4). The primary air nozzle and the secondary air nozzle are both located on the upper part of the cyclone cylinder (1), and the flue gas outlet is located in the top of the cyclone cylinder (1). The combustion device comprises the cyclone combustion apparatus and a supplementary combustion apparatus located in the downstream of the cyclone combustion apparatus. The supplementary combustion apparatus comprises a supplementary combustion chamber (6). The supplementary combustion chamber (6) is provided with a flue gas inlet a supplementary air nozzle (7). The other end of the flue gas discharging pipe (5) of the cyclone combustion apparatus opposite to the bottom end communicates with the flue gas inlet. The combustion method comprises: introducing primary air containing fuel powder to a cyclone combustion chamber through a primary air nozzle, introducing secondary air to the cyclone combustion chamber through a secondary air nozzle, introducing flue gas generated when the fuel powder is combusted in the cyclone combustion chamber, into a supplementary combustion chamber (6), and introducing supplementary air to the supplementary combustion chamber (6) through a supplementary air nozzle (7), so as to enable combustible matter in the flue gas to be completely combusted.

Description

technical field [0001] The invention relates to the technical field of fuel combustion, in particular to a cyclone combustion device, combustion equipment and a combustion method. Background technique [0002] my country is a country rich in coal, poor in oil, and low in gas. Although the proportion of coal in primary energy has declined in recent years, my country's energy production and consumption structure will continue to grow for a long period of time in the future. Mainly coal. [0003] The proportion of lignite in my country's coal resources is about 13%. Lignite is often used in pyrolysis to obtain pyrolysis gas, tar and semi-coke. Lignite semi-coke is the solid product remaining after low-temperature pyrolysis of lignite. Due to the large scale of pyrolysis of lignite, lignite semi-coke can replace raw coal as fuel for power generation, heating, and coal for various industrial boilers. Compared with raw coal, the ash content of semi-coke has increased, moisture ...

AI Technical Summary

Problems solved by technology

However, the existing cyclone furnaces generally deliver fuel from the upper part and discharge flue gas from the bottom. If this structure does not increase the axial length of the cyclone furnace, it is not completely suitable for slow combustion rates including lignite semi-coke. , Combustion of fuel with a long burn-out time

On the other hand, due to the high heat load in the cyclone furnace, the NOx emission is high when the fuel is burned in the cyclone furnace

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