Control principles for oxygen flow rate in premixed burners and pre-film burners.
Thread Content
I would like to ask about the control principles for the oxygen flow rate in premixed burners and pre-film burners used in water-coal slurry gasification.
The pre-coating type is used in the Sichuan University four-nozzle furnace, while the premixing type is used in the Texaco single-nozzle furnace. The four-nozzle furnace requires a large coal slurry atomization angle, mainly to ensure proper spraying. The single-nozzle atomized flame is long. They are mainly used to control the gap between the middle nozzles and the inner nozzles.
The pre-film type is primarily designed for four-nozzle gasification; taking into account the intensity of the spray and the dispersion of the coal slurry, it requires a large atomization angle and appropriate convective impact, as well as reduced erosion of the refractory bricks on the opposite side. The premixed type corresponds to top-mounted single burners, and it is designed to lengthen the flame thereby creating a larger region of backflow, which enhances the efficiency of gas utilization. The central oxygen helps to dilute and atomize the coal slurry, with a narrower atomization angle that prevents erosion of the bricks on the upper fire-facing side as well as damage to the burner caused by reverse airflow.
I agree with you; it would be best to specify the exact data for controlling the oxygen flow rate here.
Converting oxygen flow rates is complicated, as factors such as pressure and temperature need to be taken into account.