Problems that should be addressed by increasing the slag incorporation ratio in the device
Thread Content
Increasing the slag injection ratio in the unit depends primarily on the thermal balance between the two heat exchangers in the unit; if the internal and external heat exchangers of the regenerator can remove the excess heat from it, it is possible to increase the slag injection ratio, thereby improving the economic efficiency of the unit. However, the excess heat in the regenerator cannot be resolved; one can only reduce the processing capacity of the unit, which is not worthwhile. If the lift pipe feed rate is too low, clogging is very likely to occur. 2. With a high slag inclusion ratio, it is necessary to increase the temperature at the exit of the lift pipe; this results in increased yields of coke and gas as well as a reduction in intermediate products. Therefore, the slag inclusion ratio in the plant should be kept as close as possible to the design value. 3. If it is necessary to increase the slag incorporation ratio of the unit, considering replacing it with a catalyst with stronger heavy oil conversion capability would be an option.
As the slag blending ratio increases, the amount of raw coke produced **increases**, and at the same time the volume of dry gas also rises. The catalyst regeneration temperature goes up, and the overall light oil yield follows a \"rising–falling\" pattern. Therefore, there must be an optimal slag blending ratio!