Ignition method of boiling furnace

Abstract

The invention relates to an ignition method of a boiling furnace. The method comprises the following steps of: laying hot furnace slag on an air distribution plate; laying bamboo charcoal on the hot furnace slag, and igniting the bamboo charcoal to form a charcoal fire layer; forming a micro negative pressure of minus 10 to 50Pa in a hearth; starting an air blower, so as to enable the charcoal fire layer to slightly jump and not to be buried by the furnace slag; uniformly spreading slack coal on the charcoal fire layer, and gradually increasing air quantity so as to raise the temperature of a material layer; when air output reaches the minimum air speed during normal operation, maintaining the temperature-rise speed of the material layer according to the quantity of the spread slack coal; when the temperature of the material layer reaches 600 to 700 DEG C, increasing the quantity of the slack coal and the air output to enable the air speed to exceed the minimum air speed within 5s; when the temperature of the material layer reaches 750 to 800 DEG C, remaining the addition amount of the slack coal and the air output unchanged so as to steadily raise the temperature; when the temperature of the material layer reaches 800 to 850 DEG C, starting a coal feeder to normally feed coal, remaining the air output unchanged, and adjusting a combustion situation until a flame is stabilized to be golden yellow. According to the ignition method, the ignition time is short and the one-time ignition success rate is high.

Description

technical field [0001] The invention relates to the technical field of combustion, in particular to an ignition method for a fluidized fluidized furnace. Background technique [0002] Fluidized bed furnace is a fluidized bed coal-fired hot air stove (abbreviated as fluidized bed furnace). Its combustion method is that the coal is broken into particles below 10mm, and sent to the furnace fluidized bed at a uniform speed by the coal feeder. The high-pressure air of the blower passes through the equal pressure The bellows are shot into the furnace from the small holes in the air distribution plate, and the wind scattered from all sides aggregates into an "air cushion" to hold up the coal particles and make the furnace charge boil and burn in a fluidized state. Coal particles and cinders jump up and down at high temperature, rub against each other, collide and crack, from small to large until they are burnt; this kind of combustion has the characteristics of large contact area b...

AI Technical Summary

Problems solved by technology

[0004] The above is the basic ignition process of the fluidized fluidized furnace. In the specific implementation process, we often encounter various problems such as failure to ignite, rapid coking, material bed penetration, and extremely unstable combustion state of the furnace, which makes the above tedious ignition process All previous efforts have been wasted, and it is necessary to start all over again, especially to clean the material bed after coking. will take a lot of time