Determination of the preheating temperature of the crude oil before entering the nozzle

The preheating temperature of the crude oil needs to be determined based on the specific properties of the crude oil and the conditions of the equipment. Generally, the preheating temperature should be above the softening point of the material, but not exceed its ignition point to avoid safety accidents. At the same time, the operating temperature range of the nozzle should also be taken into account to prevent damage to the nozzle due to excessive temperatures. Additionally, the preheating temperature of the crude oil should also be adjusted according to the desired atomization effect. If the preheating temperature is too high, it may cause the feed oil to evaporate prematurely, affecting the atomization effect ； If the preheating temperature is too low, it may result in the raw oil having excessive viscosity, making it difficult to be atomized by the nozzle. Therefore, it is necessary to determine the appropriate preheating temperature through experiments and practical operation experience to ensure good atomization of the feed oil. .

It depends on the properties of the raw materials, I guess

It is determined based on the properties of the raw materials. Is there any precise criterion for this? The available information talks about what level of control is needed for heavy oil catalysis and what level is required for wax oil catalysis. However, in the case of heavy oil catalysis, the raw materials can vary in terms of density, and the slag blending ratio also differs significantly; therefore, it’s not clear exactly what factors are used to determine the appropriate level of control.

What everyone has said above is correct. The preheating temperature needs to be determined based on the properties of the crude oil, but generally it ranges between 180–220°C. Either too low or too high a temperature can affect the atomization effect of the nozzle, which in turn impacts the yield of the plant.