Determination method and combustion control method of upward swing angle value of burner nozzle of pulverized coal boiler

Abstract

A pulverized-coal boiler burner nozzle up-swing angle value determination method and a pulverized-coal boiler combustion control method, the determination method includes: for each coal type and each combustion condition, respectively setting the corresponding burner nozzle up-swing angle value, At least two burner nozzle up-swing angle values ​​are different from each other, and the boiler combustion adjustment test is carried out according to each coal type and the corresponding burner nozzle up-swing angle value, and the thermal deviation between the left and right sides of the reheater and the reheat steam temperature are detected Deviation; determine whether the heat deviation on the left and right sides of the reheater and the reheat steam temperature deviation are less than the preset side heat deviation threshold and the preset steam temperature deviation threshold respectively; if not, return to set the corresponding up-swing angle value of each burner nozzle; if , determine the current upward swing angle value of each burner nozzle as the upward swing angle value of each burner nozzle of the boiler corresponding to the current coal type and combustion working condition. The invention makes there be deviation values ​​among the up-swing angle values, thereby improving the operation efficiency, economy and boiler operation safety of the unit.

Description

technical field [0001] The invention relates to the technical field of pulverized coal combustion, in particular to a method for determining the upswing angle value of a burner nozzle of a pulverized coal boiler and a combustion control method for a pulverized coal boiler. Background technique [0002] With the rapid development of my country's national economy, the demand for electricity continues to grow. In order to use energy more effectively, thermal power generating units are constantly developing towards higher parameters and larger capacity. Most of the pulverized coal power plant boilers of large thermal power units in service are arranged in four corners and fired in a tangential circle. The most important feature of this tangential combustion method is that the airflow in the furnace rotates, and the fuel, air and flue gas are strongly mixed to form good combustion conditions. At the same time, due to the rotation of the air flow, the flame ignites the adjacent ...

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Problems solved by technology

However, the effect of this method on reducing the thermal deviation has a lot to do with the setting of the anti-cut air flow. If the momentum and angle of the anti-cut air flow are not properly selected, not only will the smoke temperature deviation not be reduced, but it will also cause confusion of the air flow in the furnace. Exacerbate the deviation of smoke temperature

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