Automatic combustion stabilization system used for corner tangential boiler

Abstract

The invention belongs to the field of large power station boiler low-load combustion stabilization, and particularly relates to an automatic combustion stabilization system used for a corner tangential boiler. The problem that the combustion stabilization oil using amount is large when the corner tangential boiler runs under the ultralow load is solved. The automatic combustion stabilization system mainly comprises an oxygen heater, a window-shade pulverized coal burner, a high temperature oxygen generator assembly and the like; and boiler tail smoke and a medium-frequency induce coil are used, oxygen can be heated to about 1000 DEG C to the maximum degree, then high temperature oxygen is conveyed to the concentrated phase side of the window-shade pulverized coal burner, and high oxygen concentration, high pulverized coal concentration and high temperature three-high zones are formed for stabilizing pulverized coal combustion. According to the automatic combustion stabilization system, the high temperature oxygen parameter and the high temperature oxygen generator position are adjusted, the need of combustion stabilization of different coal qualities can be met, all-process oxygen putting and combustion stabilization can be achieved, safety in the boiler combustion stabilization process is greatly improved, and the working amount of running persons is reduced.

Description

technical field [0001] The invention belongs to the field of low-load stable combustion of large-scale power station boilers, and in particular relates to an automatic stable combustion system for four-corner tangential circle boilers. Background technique [0002] Power plant boilers often run at low load for a long time during deep peak shaving, and oil guns are needed to support combustion, which has caused a heavy economic burden to users. According to statistics, a 600MW large-scale utility boiler consumes an average of about 400 tons of oil per year for stable combustion. [0003] In response to this situation, my country has developed various fuel-saving and stable combustion technologies to solve this problem: [0004] The oil-free and stable combustion technology represented by plasma ignition and high-temperature air ignition technology has many patents, such as a plasma ignition device (CN1230659) for directly igniting a four-corner tangential boiler, a plasma ig...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of large oil consumption of four-corner tangential boilers in the process of low-load stable combustion, especially for boilers burning low-quality coal, the oil consumption is very large, and to provide a utility model with advanced principles and simple structure. The high-temperature oxygen stable combustion system for the four-corner tangential boiler uses high-temperature oxygen instead of fuel oil to achieve oil-free stable combustion and reduce the operating cost of the boiler under low-load conditions

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