Small Wave Flame Disturbance Extended Combustion Device

Abstract

The invention provides a small-wave flame disturbance extension combustion device, which comprises a main body and at least two grooves, wherein the main body is a hexahedron; the hexahedron comprises an upper surface, a lower surface, a front surface, a back surface and two side faces; the side faces are fixedly connected with the side wall of a chain furnace; the back surface is fixedly connected with the front arch surface or the back arch surface of the chain furnace; and the front end of the main body passes from the upper surface to the lower surface, so that the grooves are formed. Due to the adoption of the small-wave flame disturbance extension combustion device provided by the invention, the disturbance of flue gas is enhanced remarkably, the combustion of combustible matters in the flue gas is enhanced, the temperature of the flue gas is raised, thermal radiation on a coal bed is enhanced, the coal bed firing condition of the chain furnace can be improved remarkably, and the adaptability of the chain furnace to coal quality is enhanced. The small-wave flame disturbance extension combustion device is suitable for boiler design and technical reconstruction of the conventional boiler.

Description

technical field [0001] The invention relates to the technical field of suspension combustion of coal-fired boilers, in particular to a wavelet-type flame disturbance expansion combustion device which improves the ignition conditions of the coal-fired layer of chain boilers and strengthens the disturbance combustion of flue gas. Background technique [0002] The chain furnace belongs to the moving layer combustion, and its working method is that after the coal falls from one end of the grate onto the grate surface and enters the furnace, it gradually moves slowly from front to back with the grate, and the air required for combustion passes through the gap of the grate from bottom to top perpendicular to the moving coal seam. The ignition of coal mainly depends on the radiant heat of the furnace flame and arch, so the upper coal is ignited first, and then gradually burns downward. In the past, the rear arch design with simple upward inclination and arc-shaped exit was almost ...

AI Technical Summary

Problems solved by technology

The ignition of coal mainly depends on the radiant heat of the furnace flame and the arch, so the upper coal is ignited first, and then gradually burns downward. It is a single-sided ignition method, and the ignition conditions are poor, resulting in a small range of coal quality.

In the past, the rear arch design with simple upward inclination and arc-shaped exit was almost adopted at home and abroad, so that most of the high-temperature flue gas flows upward at the turn of the exit of the rear arch, which is not conducive to the formation of strong swirling airflow and is not conducive to the ignition of coal seams. effect

Similarly, there is an uneven distribution of air volume along the width of the grate

The inherent combustion characteristics of the above-mentioned chain furnace lead to poor coal seam ignition conditions in actual operation, poor adaptability of coal types, and low-quality coal are difficult to ignite

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