Method for emulsification continuous feeding of heavy oil weight catalytic cracking raw material

Abstract

The invention relates to a method for emulsification continuous feeding of a heavy oil weight catalytic cracking raw material, comprising the following steps of: mixing and emulsifying the catalytic cracking raw material, a compound emulsifier and water; and directly introducing emulsified emulsifying oil into a catalytic device for catalytic reaction, wherein the emulsifying is carried out at normal pressure and the temperature of 50-95 DEG C, the water adding quantity accounts for 1-15% of the mass of the emulsifying oil, the adding quantity of the compound emulsifier accounts for 0.01-2% of the mass of the emulsifying oil, and the stirring speed is more than 15,000r / min. In the invention, the emulsified emulsifying oil as the catalytic raw material is directly introduced into the catalytic device for catalytic reaction without utilizing a buffer oil tank in the middle process, the dwell time after emulsification is short and the emulsion breaking problem is unavailable. After the heavy oil catalytic cracking raw material is emulsified, the dispersity and the atomization degree of the catalytic cracking feeding are improved, the atomization efficiency is enhanced, the particle diameter of feeding oil drop is greatly reduced, an oiling agent is ensured to be effectively contacted, the cracking depth is increased, and the purposes of enhancing the yield of light weight oil and the total liquid yield and reducing the yield of coke can be achieved.

Description

technical field [0001] The invention relates to a method for emulsifying continuous feeding of heavy catalytic cracking raw materials. Background technique [0002] The development of domestic catalytic cracking has been very mature, especially in recent years, the technological development of heavy oil catalytic cracking is quite rapid. The raw material is heavy, not suitable for atomization, and it is more difficult to completely vaporize, making the heavy oil catalytic cracking process a more complex gas-liquid-solid three-phase reaction system, which brings difficulties to the effective contact of the oil agent; The high content of asphaltene and asphaltenes and high carbon residue will significantly increase the coke yield and bring difficulties to the stripping and regeneration of the catalyst. The high content of metals such as nickel and vanadium in the residual oil directly affects the activity, selectivity and stability. Therefore, the catalytic cracking of heavy...

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Problems solved by technology

[0005] The above patents all use the method of emulsifying catalytic cracking raw materials to improve catalytic cracking efficiency, but the feeding method is discontinuous feeding, that is, the catalytic cracking raw materials are emulsified first, stored in the buffer tank, and injected into the riser through the raw material pump to react The device has high requirements on the stability of emulsified raw materials, and the storage time should not be too long, otherwise there will be demulsification and the purpose of improving product distribution cannot be achieved.

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