Load and pressure of the gasification process

It should have an impact on the active gas components, and consumption will increase.

The residence time during low-load operation increases, resulting in a slight increase in the effective gas ratio. However, too low a load, including operation at half load, results in poor atomization of the burner, a low C conversion rate, and a high C content in the slag. A low burner pressure difference results in a shorter flame, which generates more radiant heat on the dome bricks and the burner, hindering long-term operation.

During the transformation catalyst sulfidation, gas is introduced from gasification, so both the operating load and pressure are much lower than the design values.

What method is used for catalyst sulfidation? What to add?

Under different loads, as long as the pressure and temperature are maintained, there will be no effect on the composition of the syngas. When operating for a long period at constant temperature and low pressure, the concentration of active gas components increases; at this time the system temperature also drops. Pay attention to fine-tuning the oxygen supply pressure in the oxygen pipeline and the pressure in the flash system. Also, under low-load and low-pressure conditions, whether the performance of valves, instruments, etc. meets the requirements. I have also been thinking about this issue recently, but I don’t have any good ideas. If the moderators have any good perspectives, I would like to discuss them.

1. If the pressure in the gasification furnace is lower than the corresponding design load pressure, the first thing to be affected is the atomization effect, which in turn affects the carbon conversion rate. The composition of the syngas is certainly affected as well, but since it is intended for sulfidation as mentioned by the original poster, this impact can be ignored for now； 2. Due to the low carbon conversion rate, the coarse slag will certainly be of poor quality. However, because the load is low, the amount of slag produced will not be very large. This could still lead to a decline in water quality in the system; therefore, it is necessary to monitor changes in water quality as well as the concentration of black water, and take measures to improve the water quality at appropriate times ； 3. Due to low load and low pressure, it is difficult to control the water volume in the system as well as the liquid level; moreover, the temperature of the syngas remains low. All these issues require close monitoring, and adjustments should be made promptly once problems arise. It is best to assign experienced personnel to operate the system ； 4. Due to low load and low pressure, the dark zone will definitely become shorter; the bricks at the crown of the structure will be affected, as well as the burners. It is necessary to monitor the temperature at the crown, and take appropriate measures to reduce the temperature if needed ； 5. To what extent is the pressure low, how does the flash evaporation system operate, and can water separation be carried out properly? These are also issues; therefore, the owner needs to make appropriate arrangements based on the actual conditions and processes. 6. Its operation mode is very unstable, and safety accidents can occur easily; therefore, all preparatory and inspection tasks must be carried out thoroughly. During operation, close observation is necessary, and strict safety precautions must be taken. Summary: Since it is mainly used for vulcanization, the operating time will not be very long; it’s a necessary situation. Therefore, the original poster need not worry too much about the refractory bricks and burners – just pay attention to points 2, 3, 5, and 6. For any other matters not covered, please feel free to add more information..............

Once the driving is stable, the load can be increased to 70% and then vented； Or, sulfur can be added directly to the gasification process for sulfidation.