Device with annular cold air low-heat-storage quick start ignition and combustion system

Abstract

The invention relates to a device with an annular cold air low-heat-storage quick start ignition and combustion system. The device is characterized in that an ignition and combustion device is composed of a combustor body and an ignition device of which an ignition end extends into the combustor body, wherein the ignition and combustion device is arranged in a combustion air duct; the combustion air duct is connected with an air supplementing duct and an air distribution duct; the air supplementing duct is provided with an adjusting damper; a communicating chamber is provided with an expansion joint; a thermal fire-proof layer is arranged outside the device with the annular cold air low-heat-storage quick start ignition and combustion system. In an ignition starting process of a boiler, primary hot air volumes of the air supplementing duct and the air distribution duct are adjusted through the adjusting damper, so that hot air and fuel are fully mixed and combusted and the combustion efficiency is improved; the purposes of low oil consumption and quick start of a circulating fluidized bed boiler are reached by reducing the lengths of the ducts, reducing the using amount of the thermal fire-proof material and reducing the heat storage capacity of the ducts.

Description

technical field [0001] The invention relates to a primary air ignition combustion system device of a circulating fluidized bed boiler, in particular to an ignition combustion system device with a ring cooling air, low heat storage and quick start. Background technique [0002] The circulating fluidized bed boiler generator set uses the circulating fluidized bed boiler as the power to generate electricity. When starting the circulating fluidized bed boiler, the combined start-up mode of bed and under-bed oil guns is generally adopted, and the under-bed start-up ignition is the main method. In order to achieve under-bed ignition, the circulating fluidized bed boiler is equipped with a primary air ignition combustion system, which includes a combustion air duct, a supplementary air duct, an air distribution duct, and an under-bed ignition burner. During the start-up process, the circulating fluidized bed boiler will consume a large amount of fuel oil every time it is started a...

AI Technical Summary

Problems solved by technology

During the start-up and commissioning process of the circulating fluidized bed boiler, it is necessary to adjust the atomizing sheet several times to improve the atomization effect of the fuel oil, which makes the starting and debugging process of the circulating fluidized bed boiler very cumbersome; When the fuel atomization reliability is not high and the fuel atomization effect is not good, it is easy to cause oil droplets to fall into the combustion air duct, which not only causes fuel waste, but also affects the normal start-up of the circulating fluidized bed boiler

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