Method capable of improving gasoline yield of catalytic cracking device

Abstract

The invention provides a method capable of improving the gasoline yield of a catalytic cracking device, belonging to the technical field of catalytic cracking of petroleum refining. The method is characterized in that a to-be-catalytically-cracked raw material, water and an emulsifier are mixed through a premixer, and then enter an emulsifying device for emulsifying; the mass ratio of the to-be-catalytically-cracked raw material to the water to the emulsifier is (88-89.7): (8.5-10): (1.8-2); emulsified oil obtained by emulsifying directly enters a catalytic device for a catalytic reaction; andthe conditions of emulsifying in the emulsifying device are as follows: shearing and stirring are performed at a rotating speed of 6000 r/min to 8000 r/min, and a pressure of 1.3 MPa to 1.4 MPa and atemperature of 180 DEG C to 195 DEG C are maintained in the emulsifying device at the same time. The method provided by the invention improves the dispersity and the fogging degree of a catalytic cracking feeding material, improves the depth of cracking, and enhances the motor octane number and the research octane number of catalytically cracked gasoline at the same time. Meanwhile, a calibrationtest is performed on an industrial device, so the distribution of a cracked product is improved, and the yield of gasoline is enhanced.

Description

technical field [0001] The invention discloses a method for increasing the gasoline yield of a catalytic cracking unit, which belongs to the technical field of catalytic cracking in petroleum refining. Background technique [0002] When the catalytic cracking unit implements the production of high-yield gasoline, it mainly improves the gasoline yield from the aspects of raw materials, catalysts, reaction depth, and product extraction. The method to improve the gasoline yield by improving the raw material composition is mainly to increase the content of light oil products (such as wax oil) in the raw material, and to reduce the residual oil rich in polycyclic aromatic hydrocarbons, colloids, asphaltenes and other components that are not easily cracked. The blending ratio of coker wax oil. At present, crude oil is becoming more and more inferior, and the oil to be processed by catalytic cracking units is also more difficult to process. This method cannot fundamentally solve t...

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Problems solved by technology

However, the existing technology is to emulsify the catalytic cracking feedstock at normal pressure and lower temperature (below 100°C). In the industrial production process, the preheating temperature of the catalytic cracking feedstock is usually high, reaching about 140°C~220°C. It is difficult to form a stable emulsified state at this temperature, and when the emulsified oil formed at normal pressure and low temperature enters the nozzle at the feed temperature of the catalytic device, it is easy to cause pressure fluctuations at the nozzle, which is not good for production

There is a lack of a technology that can greatly increase the gasoline yield of the catalytic device and simultaneously increase the octane number of the catalytic cracking gasoline motor method and the research method

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