Catalysing is one of the important ways to achieve secondary processing. Its rationale is more complex, five of which are most common, namely, fracture response, isomerization response, aromatic hydrocarbons reaction, hydrogen transfer response and supersizing indentation response. The overall reaction is a heat-absorption trend. The catalytic process can be divided into reaction, fractionalization and stability. The response process requires two components, i. E. Reactor and regenerator. The role of the reactor is to crack and separate the post-fissile product from the catalyst. Fresh raw materials (pressure-reducing fraction oils) were mixed with recalcitrant oil after a series of heat-releases, preheating to about 370°c in the heating furnace, sprayed by raw oil nozzles into the lower of the lifting tube reactor in a misty state, direct entry of the oil into the lifting tube without heating, contact with and immediate vapourization of the high temperature catalyst from the regenerator (approximately 650°c ~ 700°c), together with the aerosol vapour and pre-upgrading steam, with catalysts passing through the lifting tube at a high speed of 7 m ~ 8 m/s, most of the catalysts were separated from the fast-separators, and the oil gas was transported to the distillation system with a small amount of catalysts separated from the secondary cyclone separators. In order for the catalyst to function, a regenerative agent is required because of the failure of the catalyst as a result of the burning of the focal mass on its surface. Catalysts containing coke enter the gas section below them from the sink, using thermal vapour to remove a small amount of gas adsorbing on the surface of the catalyst. Catalysts after regeneration are returned to the lifting tube reactor for recycling through flooding pipes, regenerative tilts and regenerative single slide valves. The role of the distillation system is to separate the products of the reaction process and to obtain steps for some products and semi-finished products. High-temperature gas from the reaction process enters the lower of the catalytic distillation tower, then enters the fraction after deheating, and after distillation receives gas, gas, coarse gasoline, light diesel, heavy diesel, refining oil and oil. Gas-rich and crude gasoline will later enter the absorption system; light and heavy diesel oil will be the finished oil, and the refined oil will be returned to respond — recycled systems. A portion of the oil is returned to the reaction system for refining and another part is recycled to the distillation tower. The gas derived from the oil and gas diggers of the distillation towers contained gasoline components, while the crude gasoline dissolved c3, c4 and even c2 components. The function of the absorption system is to separate gas-rich and crude gasoline from dry gas (≤c2), liquefied gas (c3, c4) and steam pressure-qualified stable gasoline using absorption and distillation methods。
