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Catalytic conversion method of double reactor and its device

A reactor and reaction technology, applied in the field of catalytic conversion methods and devices, can solve problems such as difficult implementation, complex devices, and large investment, and achieve the effects of low contact temperature, simplified devices, and reduced olefin content in gasoline

Inactive Publication Date: 2009-07-29
石宝珍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is still necessary to build a gasoline settler, the device is complicated, the investment is large, and it is not easy to implement

Method used

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  • Catalytic conversion method of double reactor and its device
  • Catalytic conversion method of double reactor and its device
  • Catalytic conversion method of double reactor and its device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1. The reaction materials are: pipeline transportation of heavy oil at atmospheric pressure, 100t / h heavy oil, gasoline feedstock is heavy oil reaction self-produced gasoline, with the main purpose of producing low olefin gasoline; heavy oil preheating 220°C, gasoline 40°C; gasoline reaction The reactor uses the patent application number 200510017986.4, and the heavy oil reactor is in the form of a riser; the gasoline and heavy oil reaction products are separated, and enter their respective fractionation towers through their respective oil and gas pipelines for product separation. The heavy oil enters the riser in four ways, and the gasoline enters the reactor in two ways; the reaction temperature of heavy oil is 500°C, the reaction time is 2.5s, the reaction temperature of gasoline is 430°C, and the reaction time is 3s; The temperature of the catalyst before the reaction in the vessel is 600°C; the regeneration temperature is 690°C.

[0035] For the apparatus u...

Embodiment 2

[0039] Example 2. The reaction materials are: Daqing atmospheric heavy oil, 100t / h heavy oil, gasoline feedstock is heavy oil to react self-produced gasoline; heavy oil is preheated at 220°C, gasoline is at 40°C; the heavy oil reactor is in the form of a riser, and the gasoline reactor is a riser gasification The heavy oil enters the riser in four ways, and the gasoline enters the reactor in two ways; the reaction temperature of heavy oil is 515°C, and the reaction time is 2.5s; the reaction temperature of gasoline is 525°C, and the reaction time is 4s. The residence time in the chemicalization section is 0.5s, and the residence time in the middle fast fluidized bed is 3.5s; the superficial flow velocity of oil and gas in the fluidized bed is 4.0m / s; The catalyst temperature is 620°C; the regeneration temperature is 690°C. For the device used see figure 1 , where the reactor part uses Figure 4 type shown.

[0040] Comparative example: The heavy oil reaction part is differ...

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PUM

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Abstract

The invention provides a catalytic cracking method, using double reactors, so that the raw material oil and gasoline react separately according to their respective requirements; the low-temperature catalyst after the gasoline reaction enters the pre-lifting section of the raw material oil reactor, continues to participate in the raw material oil reaction, and improves Catalyst-to-oil ratio; the low-temperature catalyst after the gasoline reaction is refluxed before the gasoline is fed, the temperature of the gasoline reaction catalyst is reduced, and the catalyst-to-oil ratio is improved; the catalytic cracking unit of the present invention uses a coupling reactor, and the gasoline reaction part and the heavy oil reaction part are arranged Catalyst delivery pipe, which directly sends the catalyst after gasoline reaction to the pre-lifting section of heavy oil reaction part from the gasoline reaction part. The gasoline reaction part itself is equipped with a catalyst return pipe to return the catalyst part after gasoline reaction to the front of gasoline feeding; The inventive catalytic cracking unit uses a settler, which can separate the crude oil reaction oil gas and gasoline reaction oil gas, and enter their respective fractionation towers to form a single settler double fractionation tower scheme to obtain pure gasoline modified products.

Description

technical field [0001] The invention belongs to the technical field of catalytic conversion of petroleum hydrocarbons, in particular to a catalytic conversion method and device capable of increasing catalytic cracking yield and improving product quality. Background technique [0002] Catalytic cracking is an important secondary processing method for petroleum heavy fractions. Especially in China, about 80% of gasoline comes from catalytic cracking units. How to increase the product yield of the catalytic cracking unit and improve the product quality are very important. Conventional catalytic cracking methods and devices use riser reactors, which have obvious deficiencies in the reaction process. First of all, the temperature of the regenerant is high, which limits the ratio of reactant to oil and the preheating temperature of heavy oil; it affects the product yield; in addition, the product quality of the catalytic cracking unit is not ideal, especially the olefin content ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G55/08
Inventor 石宝珍
Owner 石宝珍