The boiler accounting work must be carried out when carrying out the low nitrogen transformation. The specific needs include the following contents: the balance accounting between the boiler combustion system and the soda water system; The momentum of the boiler dynamic field and the influence index of the transformation process on the dynamic state of the burner. In short, it is necessary to reduce nitrous oxide emissions and maintain the boiler in an optimal stable state under the premise of completing the system transformation.
Before the installation of the burner, some preparatory work is essential. First, the control of the horizontal Angle of the burner should be strictly horizontal, the size of deflection Angle should be precisely measured, and the verification work should be completed. The determination of the nozzle size and the diameter of the tangential circle should be carried out in accordance with the standards to ensure that the design standards are met.
In the renovation of cold state acceptance, it is necessary to balance the circumferential acceptance of the burner, and it is also very necessary to calibrate and balance the wind speed, and the best value should be determined through strict experiments.
It is necessary to modify the original combustion mode after the low-nitrogen transformation of the burner to ensure that the adjusted scheme can meet the safety requirements and meet the relevant low-carbon emission standards. The specific is to control the nitrogen emissions in the safe concentration index.
1) Operation mode of burner. For the transformation of low nitrogen burners, the focus should be placed on how to enhance the temperature of the furnace and the stability of pulverized coal combustion, so as to avoid the sudden shutdown or insufficient power of the burner as far as possible.
2) Boiler secondary air distribution mode. The secondary air distribution mode of the boiler should meet certain basic needs to ensure that the surplus air coefficient in the main combustion area is within a reasonable range; When the burner needs to be out of service, the damper corresponding to it should be properly closed; After the completion of the first reconstruction project, the opening and closing degree of the damper is determined by its corresponding flow curve. In the process of boiler operation, it is necessary to ensure that the air pressure of the bellows is normal, which can meet the rigid demand of the air jet.
3) Boiler operating oxygen. To control the oxygen content of the boiler in a reasonable range, it is necessary to determine the optimal oxygen content of the boiler in combustion according to the actual combustion test results.
It is one of the key contents of the management to strengthen the coal blending and blending management of the boiler after the transformation of low nitrogen burners. It has special assessment standards, so it is strictly prohibited to buy residual mixed cinders in theory. The corresponding coal matching needs need to adopt the opinions of coal source suppliers. Once there is an abnormal phenomenon, it is necessary to make timely response and urgently formulate solutions. In the mixing process of coal burning, it is necessary to pay special attention to the effect of slagging on boiler performance.
EBICO will attend Thailand's Premier Power Generation & Electric Exhibition...
How a bowl of Baixiang good noodles is born? About 1.8 million years ago, humans learned to cook food with purposeful control of fire. The use of fire has made unprecedented progress in human health and life, and Darwin also called cooking the most important invention of mankind after language....
