Flame stratified combustion control method for natural gas combustor

Abstract

The invention discloses a flame stratified combustion control method for a natural gas combustor. The operation is simple, the field working condition is adapted, the method comprises the following steps: mounting a heating part, determining flame allowable length, determining an outer zone flame range formed by an outer-layer nozzle and an inner zone flame range formed by an inner-layer nozzle, then, adjusting the range of the flame by adjusting the positions of a porous flame stabilizing disc and a rotational flow fan, adjusting a rotating speed of a blower according to demands, and adjusting the extending distance of the outer-layer nozzle. The adjustment process is simple and convenient, normal operation of equipment is not affected, the content of produced nitric oxide is measured after adjustment is finished, sprayed flame reaches the preset flame allowable length through multiple times of adjustment, it can be guaranteed that little nitric oxide is produced, the whole control method is suitable for processing of chemical products such as asphalt, and the control method conforms to the field working condition in the implementation process.

Description

technical field [0001] The invention relates to a control method of a special burner for asphalt mixing, in particular to a control method for flame stratified combustion of a natural gas burner. Background technique [0002] There are three main sources of nitrogen oxides in the industrial furnace and boiler industry, namely, thermal type, fuel type, and rapid type. It is because our temperature is too high, the fuel itself comes with it, and the CH free radicals produced by the decomposition of hydrocarbons volatilized during fuel combustion react with nitrogen molecules in the air to produce CHN and N, which then react with oxygen to form. The use of fuels without nitrogen molecules, such as natural gas, can remove fuel-type nitrogen oxides; in the case of low oxygen concentration, increasing the residence time of combustibles in the flame front and reaction zone reduces the production of rapid nitrogen oxides. The treatment of thermal nitrogen oxides is the main directi...

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Problems solved by technology

Existing natural gas burners still use a single-structure pipe inside, and the flame temperature of the gas injection is too high, which will still produce a large amount of nitrogen oxides, which is not environmentally friendly. The adjustment affects the production of nitrogen oxides, so the flame stratification technology of natural gas burners appeared, but the existing flame stratification technology of natural gas burners cannot reasonably adapt to the working conditions when used, and its operation is inconvenient, which affects the use

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