Low nitrogen combustion reformation and operation Optimization of boiler in thermal power plant

First,Boiler combustion transformation of thermal power plant

At present, China's technology and technology cannot achieve the full realization of nuclear power generation, so its main power generation mode is still thermal power plants. In order to solve its environmental pollution problem, it is necessary to apply the low-nitrogen combustion transformation technology accordingly, so that China's thermal power plants power generation on the road of sustainable development. The core of its low-nitrification combustion transformation is to upgrade the traditional combustion mode to the three-dimensional graded combustion mode by using the vertical pulverized coal super-concentration separation technology. In the actual transformation process, the burner in the original boiler needs to be re-improved and rearranged to be a low-nitrogen burner in an overall way, and its pulverized coal nozzles should be changed to an up-down swinging structure and separated vertically to achieve the purpose of improving the heat efficiency of the low-nitrogen burner and reducing NOx emission.

Second, low nitrogen combustion operation optimization of thermal power plant.

After replacing the traditional burner with a low-nitrogen burner, it is necessary to carry out corresponding optimization work, so as to ensure the normal operation of the boiler comprehensively and improve the power generation rate, expand the economic benefits of the thermal power plant, and reduce the gap between steam temperature and smoke temperature on both sides. At present, the commonly used operation optimization measures for low nitrogen combustion in thermal power plants can be roughly divided into adjusting pendulum Angle and burnout wind. Adjust the primary wind, secondary wind and boundary wind; Adjust the oxygen in the furnace; Adjust a few measures such as pulverized coal fineness.

Adjusting the pendulum Angle and burning-out air means that under the condition of high steam temperature, appropriately reducing the burner's pendulum Angle and optimizing the burning-out air can effectively reduce the oxygen content, appropriately increase the upper combustion rate, and significantly improve its low-nitrogen combustion efficiency.

Adjustment of primary air, secondary air and perimeter wind refers to the realization of low oxygen combustion in the main combustion area through the realization of secondary air combination, and the actual adjustment of corresponding parameters, and the more suitable adjustment of secondary air through the actual low-nitrogen combustion situation.

Adjusting the oxygen content in the furnace refers to controlling the oxygen content in the furnace between 2.5% and 3.5%, which can obviously reduce NOx emission and ensure that the boiler can maintain a good working efficiency for a long time.

To adjust the fineness of coal powder is to adjust the separator baffle appropriately, make it smaller, reduce the fineness of coal powder, and finally make the combustion of coal powder more sufficient, which can effectively prevent the overheating of the heating surface due to the low oxygen environment, and improve the safety and stability of its boiler operation.